EP2509724B1 - Method for forming the body of a press brake, and a press brake - Google Patents
Method for forming the body of a press brake, and a press brake Download PDFInfo
- Publication number
- EP2509724B1 EP2509724B1 EP10835550.4A EP10835550A EP2509724B1 EP 2509724 B1 EP2509724 B1 EP 2509724B1 EP 10835550 A EP10835550 A EP 10835550A EP 2509724 B1 EP2509724 B1 EP 2509724B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- press brake
- reaction
- plate
- press
- lever
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/04—Frames; Guides
- B30B15/048—Laminated frame structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
- B21D5/0272—Deflection compensating means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/04—Frames; Guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
Definitions
- the invention relates to the method defined in the preamble of claim 1. Furthermore, the invention relates to the press brake defined in the preamble of claim 2.
- press brakes such as press brakes having a press force greater than 600tn and those which are very large in size
- Oversize transports have been necessary to deliver the items.
- the sheet dimensions are special dimensions, and there are only few manufacturers therefor, so parts for press brakes become expensive and the delivery time months.
- An objective of the invention is to eliminate the drawbacks referred to above.
- an objective of the invention is to disclose a method and a press brake that make it possible to avoid or at least reduce the amount of welding necessary for assembling, and reduce the size and mass of individual pieces, in which case their handling, storage, packing for transportation, transportation to installation site and assembling at the installation site become easier and the costs are reduced.
- the method according to the invention is characterized by what has been presented in claim 1.
- the press brake according to the invention is characterized by what has been presented in claim 2.
- the faces, the lower beam and the upper beam are assembled in the method from separate plate, plate pile and/or bar parts including tensile elements mainly receiving tensile load, press elements receiving press loads, and transmission elements between tensile elements and press elements in order to transmit forces therebetween.
- the tensile elements, the press elements and the transmission elements are connected to each other by mechanical connection elements without welding.
- the faces, the lower beam and the upper beam are each assembled from separate plate, plate pile and/or bar parts including tensile elements receiving tensile loads, press elements receiving press loads and transmission elements between tensile elements and press elements in order to transmit forces therebetween.
- the tensile elements, the press elements and the transmission elements are connected to each other by mechanical connection elements without welded connections.
- the mechanical connection elements are clip connections, mortise and tenon connections, locking piece connections and/or screw connections.
- a locking piece connection includes a rectangular aperture on the plate, plate pile and/or bar part and an elongated parallelepiped piece having a rectangular cross section and fitted in the aperture.
- the length of any plate, plate pile and/or bar part included in the body of the press brake is smaller than the length of the largest standard freight container.
- the length of any plate, plate pile and/or bar part included in the body of the press brake is smaller than 45FT h/c - the length of a freight container (13.56m).
- the press brake has a press force on the order of 600tn or more.
- the face includes a vertical tensile bar fitted as close to the lower beam and the upper beam as possible in order to receive the tensional loads during edging. Furthermore, the face includes a vertical back post spaced apart from the tensile bar and adapted to receive the press loads during edging. In addition, the face includes an upper lever connected to the upper end of the tensile bar and the back post in order to transmit forces between the tensile bar and the back post. Additionally, the face includes a lower lever connected to the lower end of the tensile bar and the back post in order to transmit forces between the tensile bar and the back post.
- the tensile bar is assembled from a pile of steel sheets disposed one on the other.
- the tensile bar may also be a bar formed by one monolithic material.
- the tensile bar includes upper clip connection elements at the upper end of the tensile bar on opposed sides of the tensile bar and lower clip connection elements at the lower end of the tensile bar on opposed sides of the tensile bar.
- the upper lever is formed by two identical upper lever plate halves on opposed sides of the tensile bar, each upper lever plate half including first apertures adapted to receive the upper clip connection elements therein.
- the lower lever is formed by two identical lower lever plate halves on opposed sides of the tensile bar, each lower lever plate half including second apertures adapted to receive the lower clip connection elements therein.
- the face includes a pair of side plates provided on both sides of the back post and mounted to the back post, the tensile bar and the lower lever for sideward support of the back post.
- the side plates also act as covers in order to hide the back post, the tensile bar and the lower and upper lever.
- the face includes a body element that is supported against a base.
- the body element includes a vertical column to which a mounting element is mounted.
- the mounting element includes a first tenon part that extends from the column horizontally in a first direction and can be fitted in a hole at the lower end of the tensile bar, and a second tenon part that extends from the column horizontally in a second direction opposed relative to the first direction, on which second tenon part the lower beam can be supported.
- the lower beam includes a pair of lower frame plates, each having an upper edge and a lower edge in parallel to each other with holes being disposed in the vicinity of the ends of the lower frame plates in order to receive the second tenon part in the holes.
- the lower beam includes a table mounted on the upper edges of the lower frame plates, so that the lower edging tool can be supported on the table.
- the lower beam includes a pair of lower oblique reaction bars in an upwards opening V-shape to each other, both being pivotally bearing-mounted at the upper end on the second tenon part.
- the lower beam includes a lower reaction lever, the ends of which are rigidly connected by locking piece connections to the lower ends of the lower oblique reaction bars in order to couple the lower ends of the oblique reaction bars to each other, wherein the lower reaction lever is formed by two planar lower reaction lever halves, the lower ends of the lower oblique reaction bars being fitted therebetween.
- the lower beam includes two vertical reaction levers supported on the upper edge of the lower reaction lever halves at a distance from each other and from the holes.
- the lower beam includes wedge pieces which can be disposed between the vertical reaction levers and the lower edges of the lower frame plates. The bend compensation of the lower beam may be provided by prestressing the lower beam by the wedge pieces of a suitable size to an arc which is straightened by the effect of edging force.
- the lower beam includes two crowning cylinders supported on the upper edge of the lower reaction lever halves at a distance from each other and from the holes, in which case the bend compensation of the lower beam can be provided by prestressing the lower beam by the crowning cylinders.
- the upper beam includes an upper frame plate having a long upper edge and a long lower edge in parallel to each other, the upper edging tool being mountable on the lower edge and mounting tenons being disposed in the vicinity of the ends of the upper frame plate and protruding from the upper frame plate on both sides thereof.
- the upper beam includes an upper reaction plate on the upper edge of the upper frame plate.
- the upper beam includes a pair of upper oblique reaction bars in a downwards opening V-shape to each other, both being pivotally bearing-mounted at the lower end to the mounting tenons, wherein the oblique reaction bars are formed by two planar upper reaction bar halves.
- the upper beam includes an upper reaction lever rigidly mounted by locking piece connections to the upper ends of the oblique reaction bars in order to couple the upper ends of the oblique reaction bars to each other.
- the upper beam includes two hydraulic crowning cylinders in order to provide the bend compensation of the upper beam, the cylinders being provided between the upper reaction plate and the upper reaction lever at a distance from each other and from the mounting tenons of the upper frame plate.
- the bend compensation of the upper beam can be provided by stressing the upper beam by the crowning cylinders to an arc which is straightened by the effect of edging force.
- the upper beam includes two vertical reaction levers supported between the upper reaction plate and the upper reaction lever at a distance from each other and from the mounting tenons of the upper frame plate.
- Wedge pieces can be disposed between the upper edge of the upper reaction plate of the vertical reaction levers, in which case the bend compensation of the upper beam can be provided by prestressing the upper beam with the wedge pieces of a suitable size to an arc which is straightened by the effect of edging force.
- Fig. 1 shows an example of a large-sized press brake wherein the bodywork can preferably be implemented by the manner according to the invention.
- the figure presents a press brake having a press force of 1200tn wherein the dimensions include the height of the faces of approximately 6m and the length of the lower and the upper beam of approximately 10.
- the longest individual plate parts are found on the lower and the upper beam and they have a length of approximately 10m, so they fit in a 40 feet freight container and are then transportable as standard size cargo.
- the measures are presented herein as examples only to elucidate the large size of the press brake, and the invention is not bound thereto in any manner. If cargo acceptability is considered as a limiting factor in dimensioning the press brake, then the largest parts may be as long as to still fit in a 45FT h/c freight container.
- the body of the press brake includes a pair of faces 1 at the ends of the press brake, a lower beam 2 supported to be stationary on the faces, and an upper beam 3 supported on the faces to be moved by hydraulic cylinders S vertically relative to the lower beam 2.
- the faces 1, the lower beam 2 and the upper beam 3 are each assembled from separate plate, plate pile and/or bar parts including tensile elements 4, 25, 36 receiving tensional loads, press elements 5, 20, 24, 31 receiving press loads, and transmission elements 6, 7, 26, 28, 29, 35, 37 between tensile elements and press elements in order to transmit forces therebetween.
- the tensile elements, the press elements and the transmission elements are connected to each other by mechanical connection elements 8, 9, 10, 11, 19, 23, 27, 34, 38 without welded connections.
- the mechanical connection elements for connecting the parts of the body to each other may be for example clip connections 8, 9, 10, 11, mortise and tenon connections 19, 23, 34, locking piece connections 27, 38 and/or screw connections.
- a locking piece connection 27, 38 includes a rectangular aperture on the plate, plate pile and/or bar part and an elongated parallelepiped piece having a rectangular cross section and fitted in the aperture.
- Fig. 2 to 4 present the face 1.
- the face 1 includes a vertical tensile bar 4 fitted as close to the lower beam 2 and the upper beam 3 as possible.
- the purpose of the tensile bar 4 is to receive the tensional loads during edging.
- a vertical back post 5 is spaced apart from the tensile bar 4 and adapted to receive the press loads during edging, as illustrated by arrows in Fig. 3 .
- the face has an upper lever 6 connected to the upper end of the tensile bar and the back post in order to transmit forces between the tensile bar 4 and the back post 5 and a lower lever 7 connected to the end of the back post 5 of the tensile bar 4 in order to transmit forces between the tensile bar and the back post.
- Fig. 4 shows that the tensile bar 4 is assembled from a pile of elongated steel sheets 4 1 ...4 4 disposed one on the other.
- the tensile bar 4 includes upper clip connection elements 8 at the upper end of the tensile bar on opposed sides of the tensile bar and lower clip connection elements 9 at the lower end of the tensile bar on opposed sides of the tensile bar.
- Fig. 4 shows further that the upper lever 6 is formed by two identical upper lever plate halves 6 1 , 6 2 on opposed sides of the tensile bar 4, each upper lever plate half including first apertures 10 adapted to receive the upper clip connection elements 8 therein.
- the lower lever 7 is formed by two identical lower lever plate halves 7 1 , 7 2 on opposed sides of the tensile bar 4, each lower lever plate half including second apertures 11 adapted to receive the lower clip connection elements 9 therein.
- the face 1 additionally includes a pair of side plates 12, 13 provided on both sides of the back post 5 for sideward support of the back post.
- the side plates 12, 13 are mounted on the back post 5, the tensile bar 4 and the lower lever 7 for sideward support of the back post.
- the side plates 12, 13 also act as cover plates in order to hide the structures therebetween.
- the face 1 also includes a body element 14 to be supported against a base.
- the body element 14 includes a vertical column 15 on which a mounting element 16 is mounted, the mounting element including a first tenon part 17 that extends from the column 15 horizontally in a first direction and can be fitted in a hole 18 at the lower end of the tensile bar 4.
- the mounting element additionally includes a second tenon part 19 that extends from the column 15 horizontally in a second direction opposed to the first direction, on which second tenon part the lower beam 2 can be supported as shown in Fig. 1a and 6 .
- Fig. 5 and 6 show the lower beam 2 including a pair of lower frame plates 20, each having an upper edge 21 and a lower edge 22 in parallel to each other. Holes 23 have been disposed in the vicinity of the ends of the lower frame plates in order to receive the second tenon part 19 in the holes.
- a table 24 is mounted on the upper edges 21 of the lower frame plates 20. The lower edging tool can be installed on the table 24.
- the lower beam 2 has a pair of lower oblique reaction bars 25 in an upwards opening V-shape to each other.
- Each oblique reaction bar 25 is pivotally bearing-mounted at the upper end to the second tenon part 19.
- the lower beam includes a lower reaction lever 26, the ends of which are rigidly connected by locking piece connections 27 to the lower ends of the lower oblique reaction bars 25 in order to connect the lower edges of the oblique reaction bars to each other.
- the lower reaction lever 26 is formed by two planar lower reaction lever halves 26 1 , 26 2 , the lower ends of the oblique reaction bars 25 being fitted therebetween.
- Fig. 5 and 6 has two vertical reaction levers 28 supported on the upper edge of the lower reaction lever halves 26 1 , 26 2 at a distance from each other and from the holes 23.
- Wedge pieces 29 can be disposed between the vertical reaction levers 28 and the lower edges 22 of the lower frame plates, in which case the bend compensation of the lower beam can be provided by prestressing the lower beam by the wedge pieces 29 of a suitable size to an arc which is straightened by the effect of edging force.
- the upper beam 3 includes an upper frame plate 31 having a long upper edge 32 and a long lower edge 33 in parallel to each other.
- the upper edging tool is mountable on the lower edge 33.
- Mounting tenons 34 are disposed in the vicinity of the ends of the upper frame plate 31 and protrude from the upper frame plate on both sides thereof.
- An upper reaction plate 35 is disposed on the upper edge 32 of the upper frame plate.
- a pair of upper oblique reaction bars 36 is disposed in a downwards opening V-shape to each other. Each oblique reaction bar 36 is pivotally bearing-mounted at the lower end to the mounting tenons 34.
- the oblique reaction bars 36 are formed by two planar upper reaction bar halves 36 1 , 36 2 .
- An upper reaction lever 37 is rigidly mounted by locking piece connections 38 to the upper ends of the oblique reaction bars 36 in order to couple the upper ends of the oblique reaction bars 36 to each other.
- the upper reaction lever 37 is also formed by a number of uniform plate parts.
- Two hydraulic crowning cylinders 39 are provided between the upper reaction plate 35 and the upper reaction lever 37 at a distance from each other and from the mounting tenons 34 of the upper frame plate. The crowning cylinders 39 also apply pressure on the oblique reaction bars 35. By the crowning cylinders it is possible to provide the bend compensation of the upper beam during edging.
- the upper frame plate 31 tends vertically to bend to an arc, in which case the bending applies a tensional force on the oblique reaction bars 36, via which the force is transmitted via the crowning cylinders 39 and the upper reaction lever 37 to the upper frame plate 31, providing a force that tends to straighten the bend.
- the upper frame plate 31 and the upper edging tool mounted on the lower edge thereof can be made to remain straight.
- Fig. 7a the crowning cylinders 39 have been replaced by vertical reaction levers 40 and wedge pieces 41.
- Two vertical reaction levers 40 are supported between the upper reaction plate 35 and the upper reaction lever 37 at a distance from each other and from the mounting tenons 34 of the upper frame plate.
- Wedge pieces 41 can be disposed between the vertical reaction levers 40 and the upper edge of the upper reaction plate 35, in which case the bend compensation of the upper beam can be provided by prestressing the upper beam with the wedge pieces of a suitable size to an arc which is straightened by the effect of edging force.
Description
- The invention relates to the method defined in the preamble of claim 1. Furthermore, the invention relates to the press brake defined in the preamble of
claim 2. - It is known from the prior art, see
US 7 415 857 B1 , that generally the bodywork, ie. the upper beam, the lower beam and the faces, of a press brake are each conventionally made as a monolithic structure welded from steel sheets. - Especially in the case of very large press brakes, such as press brakes having a press force greater than 600tn and those which are very large in size, it becomes problematic that the welded seams are large, and the large and heavy pieces are difficult to handle and transport. Oversize transports have been necessary to deliver the items. The sheet dimensions are special dimensions, and there are only few manufacturers therefor, so parts for press brakes become expensive and the delivery time months.
- An objective of the invention is to eliminate the drawbacks referred to above.
- Especially, an objective of the invention is to disclose a method and a press brake that make it possible to avoid or at least reduce the amount of welding necessary for assembling, and reduce the size and mass of individual pieces, in which case their handling, storage, packing for transportation, transportation to installation site and assembling at the installation site become easier and the costs are reduced.
- The method according to the invention is characterized by what has been presented in claim 1. The press brake according to the invention is characterized by what has been presented in
claim 2. - According to the invention the faces, the lower beam and the upper beam are assembled in the method from separate plate, plate pile and/or bar parts including tensile elements mainly receiving tensile load, press elements receiving press loads, and transmission elements between tensile elements and press elements in order to transmit forces therebetween. The tensile elements, the press elements and the transmission elements are connected to each other by mechanical connection elements without welding.
- Respectively, according to the invention, it is characteristic of the press brake that the faces, the lower beam and the upper beam are each assembled from separate plate, plate pile and/or bar parts including tensile elements receiving tensile loads, press elements receiving press loads and transmission elements between tensile elements and press elements in order to transmit forces therebetween. The tensile elements, the press elements and the transmission elements are connected to each other by mechanical connection elements without welded connections.
- In one embodiment of the press brake the mechanical connection elements are clip connections, mortise and tenon connections, locking piece connections and/or screw connections.
- In one embodiment of the press brake a locking piece connection includes a rectangular aperture on the plate, plate pile and/or bar part and an elongated parallelepiped piece having a rectangular cross section and fitted in the aperture.
- In one embodiment of the press brake the length of any plate, plate pile and/or bar part included in the body of the press brake is smaller than the length of the largest standard freight container.
- In one embodiment of the press brake the length of any plate, plate pile and/or bar part included in the body of the press brake is smaller than 45FT h/c - the length of a freight container (13.56m).
- In one embodiment of the press brake the press brake has a press force on the order of 600tn or more.
- In one embodiment of the press brake the face includes a vertical tensile bar fitted as close to the lower beam and the upper beam as possible in order to receive the tensional loads during edging. Furthermore, the face includes a vertical back post spaced apart from the tensile bar and adapted to receive the press loads during edging. In addition, the face includes an upper lever connected to the upper end of the tensile bar and the back post in order to transmit forces between the tensile bar and the back post. Additionally, the face includes a lower lever connected to the lower end of the tensile bar and the back post in order to transmit forces between the tensile bar and the back post.
- In one embodiment of the press brake the tensile bar is assembled from a pile of steel sheets disposed one on the other. The tensile bar may also be a bar formed by one monolithic material.
- In one embodiment of the press brake the tensile bar includes upper clip connection elements at the upper end of the tensile bar on opposed sides of the tensile bar and lower clip connection elements at the lower end of the tensile bar on opposed sides of the tensile bar.
- In one embodiment of the press brake the upper lever is formed by two identical upper lever plate halves on opposed sides of the tensile bar, each upper lever plate half including first apertures adapted to receive the upper clip connection elements therein.
- In one embodiment of the press brake the lower lever is formed by two identical lower lever plate halves on opposed sides of the tensile bar, each lower lever plate half including second apertures adapted to receive the lower clip connection elements therein.
- In one embodiment of the press brake the face includes a pair of side plates provided on both sides of the back post and mounted to the back post, the tensile bar and the lower lever for sideward support of the back post. The side plates also act as covers in order to hide the back post, the tensile bar and the lower and upper lever.
- In one embodiment of the press brake the face includes a body element that is supported against a base. The body element includes a vertical column to which a mounting element is mounted. The mounting element includes a first tenon part that extends from the column horizontally in a first direction and can be fitted in a hole at the lower end of the tensile bar, and a second tenon part that extends from the column horizontally in a second direction opposed relative to the first direction, on which second tenon part the lower beam can be supported.
- In one embodiment of the press brake the lower beam includes a pair of lower frame plates, each having an upper edge and a lower edge in parallel to each other with holes being disposed in the vicinity of the ends of the lower frame plates in order to receive the second tenon part in the holes. Furthermore, the lower beam includes a table mounted on the upper edges of the lower frame plates, so that the lower edging tool can be supported on the table. In addition, the lower beam includes a pair of lower oblique reaction bars in an upwards opening V-shape to each other, both being pivotally bearing-mounted at the upper end on the second tenon part. Furthermore, the lower beam includes a lower reaction lever, the ends of which are rigidly connected by locking piece connections to the lower ends of the lower oblique reaction bars in order to couple the lower ends of the oblique reaction bars to each other, wherein the lower reaction lever is formed by two planar lower reaction lever halves, the lower ends of the lower oblique reaction bars being fitted therebetween.
- In one embodiment of the press brake the lower beam includes two vertical reaction levers supported on the upper edge of the lower reaction lever halves at a distance from each other and from the holes. In addition, the lower beam includes wedge pieces which can be disposed between the vertical reaction levers and the lower edges of the lower frame plates. The bend compensation of the lower beam may be provided by prestressing the lower beam by the wedge pieces of a suitable size to an arc which is straightened by the effect of edging force.
- In one embodiment of the press brake the lower beam includes two crowning cylinders supported on the upper edge of the lower reaction lever halves at a distance from each other and from the holes, in which case the bend compensation of the lower beam can be provided by prestressing the lower beam by the crowning cylinders.
- In one embodiment of the press brake the upper beam includes an upper frame plate having a long upper edge and a long lower edge in parallel to each other, the upper edging tool being mountable on the lower edge and mounting tenons being disposed in the vicinity of the ends of the upper frame plate and protruding from the upper frame plate on both sides thereof. Furthermore, the upper beam includes an upper reaction plate on the upper edge of the upper frame plate. In addition, the upper beam includes a pair of upper oblique reaction bars in a downwards opening V-shape to each other, both being pivotally bearing-mounted at the lower end to the mounting tenons, wherein the oblique reaction bars are formed by two planar upper reaction bar halves. Additionally, the upper beam includes an upper reaction lever rigidly mounted by locking piece connections to the upper ends of the oblique reaction bars in order to couple the upper ends of the oblique reaction bars to each other.
- In one embodiment of the press brake the upper beam includes two hydraulic crowning cylinders in order to provide the bend compensation of the upper beam, the cylinders being provided between the upper reaction plate and the upper reaction lever at a distance from each other and from the mounting tenons of the upper frame plate. The bend compensation of the upper beam can be provided by stressing the upper beam by the crowning cylinders to an arc which is straightened by the effect of edging force.
- In one embodiment of the press brake the upper beam includes two vertical reaction levers supported between the upper reaction plate and the upper reaction lever at a distance from each other and from the mounting tenons of the upper frame plate. Wedge pieces can be disposed between the upper edge of the upper reaction plate of the vertical reaction levers, in which case the bend compensation of the upper beam can be provided by prestressing the upper beam with the wedge pieces of a suitable size to an arc which is straightened by the effect of edging force.
- In the following the invention will be described in detail by means of exemplifying embodiments, with reference to the accompanying drawing in which
-
Fig. 1 and 1a axonometrically present a front view of a first embodiment of the press brake according to the invention as seen obliquely from above, assembled inFig. 1 and the lower beam and the upper beam detached from the faces inFig. 1a , -
Fig. 2 axonometrically presents a front view of the face of the press brake according to the invention as seen obliquely from above, -
Fig. 3 schematically presents operation of the parts of the face in the press brake during edging, -
Fig. 4 presents an exploded view of the face ofFig. 2 , -
Fig. 5 axonometrically presents a front view of the lower beam of the press brake according to the invention as seen obliquely from above, -
Fig. 5a presents a modification of the lower beam ofFig. 5 where the vertical reaction levers and the wedges ofFig. 5 have been replaced by crowning cylinders, -
Fig. 6 presents an exploded view of the lower beam ofFig. 5 , -
Fig. 7 axonometrically presents a front view of the upper beam of the press brake according to the invention as seen obliquely from above, -
Fig. 7a presents a modification of the upper beam ofFig. 7 where the crowning cylinders ofFig. 7 have been replaced by vertical reaction levers and wedges, and -
Fig. 8 presents an exploded view of the upper beam ofFig. 7 . -
Fig. 1 shows an example of a large-sized press brake wherein the bodywork can preferably be implemented by the manner according to the invention. The figure presents a press brake having a press force of 1200tn wherein the dimensions include the height of the faces of approximately 6m and the length of the lower and the upper beam of approximately 10. The longest individual plate parts are found on the lower and the upper beam and they have a length of approximately 10m, so they fit in a 40 feet freight container and are then transportable as standard size cargo. The measures are presented herein as examples only to elucidate the large size of the press brake, and the invention is not bound thereto in any manner. If cargo acceptability is considered as a limiting factor in dimensioning the press brake, then the largest parts may be as long as to still fit in a 45FT h/c freight container. - The body of the press brake includes a pair of faces 1 at the ends of the press brake, a
lower beam 2 supported to be stationary on the faces, and anupper beam 3 supported on the faces to be moved by hydraulic cylinders S vertically relative to thelower beam 2. - As described with reference to
Fig. 2 to 8 , the faces 1, thelower beam 2 and theupper beam 3 are each assembled from separate plate, plate pile and/or bar parts includingtensile elements press elements transmission elements mechanical connection elements example clip connections tenon connections piece connections piece connection -
Fig. 2 to 4 present the face 1. The face 1 includes a verticaltensile bar 4 fitted as close to thelower beam 2 and theupper beam 3 as possible. The purpose of thetensile bar 4 is to receive the tensional loads during edging. Avertical back post 5 is spaced apart from thetensile bar 4 and adapted to receive the press loads during edging, as illustrated by arrows inFig. 3 . The face has anupper lever 6 connected to the upper end of the tensile bar and the back post in order to transmit forces between thetensile bar 4 and theback post 5 and alower lever 7 connected to the end of theback post 5 of thetensile bar 4 in order to transmit forces between the tensile bar and the back post. -
Fig. 4 shows that thetensile bar 4 is assembled from a pile ofelongated steel sheets 41...44 disposed one on the other. Thetensile bar 4 includes upper clip connection elements 8 at the upper end of the tensile bar on opposed sides of the tensile bar and lowerclip connection elements 9 at the lower end of the tensile bar on opposed sides of the tensile bar. -
Fig. 4 shows further that theupper lever 6 is formed by two identical upper lever plate halves 61, 62 on opposed sides of thetensile bar 4, each upper lever plate half includingfirst apertures 10 adapted to receive the upper clip connection elements 8 therein. - The
lower lever 7 is formed by two identical lower lever plate halves 71, 72 on opposed sides of thetensile bar 4, each lower lever plate half includingsecond apertures 11 adapted to receive the lowerclip connection elements 9 therein. - The face 1 additionally includes a pair of
side plates 12, 13 provided on both sides of theback post 5 for sideward support of the back post. Theside plates 12, 13 are mounted on theback post 5, thetensile bar 4 and thelower lever 7 for sideward support of the back post. Theside plates 12, 13 also act as cover plates in order to hide the structures therebetween. - The face 1 also includes a
body element 14 to be supported against a base. Thebody element 14 includes avertical column 15 on which a mountingelement 16 is mounted, the mounting element including a first tenon part 17 that extends from thecolumn 15 horizontally in a first direction and can be fitted in ahole 18 at the lower end of thetensile bar 4. The mounting element additionally includes asecond tenon part 19 that extends from thecolumn 15 horizontally in a second direction opposed to the first direction, on which second tenon part thelower beam 2 can be supported as shown inFig. 1a and6 . -
Fig. 5 and 6 show thelower beam 2 including a pair oflower frame plates 20, each having anupper edge 21 and alower edge 22 in parallel to each other.Holes 23 have been disposed in the vicinity of the ends of the lower frame plates in order to receive thesecond tenon part 19 in the holes. A table 24 is mounted on theupper edges 21 of thelower frame plates 20. The lower edging tool can be installed on the table 24. - In addition, the
lower beam 2 has a pair of lower oblique reaction bars 25 in an upwards opening V-shape to each other. Eachoblique reaction bar 25 is pivotally bearing-mounted at the upper end to thesecond tenon part 19. - Furthermore, the lower beam includes a
lower reaction lever 26, the ends of which are rigidly connected by lockingpiece connections 27 to the lower ends of the lower oblique reaction bars 25 in order to connect the lower edges of the oblique reaction bars to each other. Thelower reaction lever 26 is formed by two planar lower reaction lever halves 261, 262, the lower ends of the oblique reaction bars 25 being fitted therebetween. - The embodiment of
Fig. 5 and 6 has two vertical reaction levers 28 supported on the upper edge of the lower reaction lever halves 261, 262 at a distance from each other and from theholes 23.Wedge pieces 29 can be disposed between the vertical reaction levers 28 and thelower edges 22 of the lower frame plates, in which case the bend compensation of the lower beam can be provided by prestressing the lower beam by thewedge pieces 29 of a suitable size to an arc which is straightened by the effect of edging force. - In the embodiment of
Fig. 5a the vertical reaction levers 28 and thewedge pieces 29 ofFig. 5 have been replaced by crowningcylinders 30 supported on the upper edge of the lower reaction lever halves 261, 262 at a distance from each other and from theholes 23, in which case the bend compensation of the lower beam can be provided by prestressing the lower beam by the crowning cylinders. -
Fig. 7 and 8 present theupper beam 3. Theupper beam 3 includes anupper frame plate 31 having a longupper edge 32 and a longlower edge 33 in parallel to each other. The upper edging tool is mountable on thelower edge 33. Mountingtenons 34 are disposed in the vicinity of the ends of theupper frame plate 31 and protrude from the upper frame plate on both sides thereof. Anupper reaction plate 35 is disposed on theupper edge 32 of the upper frame plate. A pair of upper oblique reaction bars 36 is disposed in a downwards opening V-shape to each other. Eachoblique reaction bar 36 is pivotally bearing-mounted at the lower end to the mounting tenons 34. The oblique reaction bars 36 are formed by two planar upper reaction bar halves 361, 362. Anupper reaction lever 37 is rigidly mounted by lockingpiece connections 38 to the upper ends of the oblique reaction bars 36 in order to couple the upper ends of the oblique reaction bars 36 to each other. Theupper reaction lever 37 is also formed by a number of uniform plate parts. Two hydrauliccrowning cylinders 39 are provided between theupper reaction plate 35 and theupper reaction lever 37 at a distance from each other and from the mountingtenons 34 of the upper frame plate. The crowningcylinders 39 also apply pressure on the oblique reaction bars 35. By the crowning cylinders it is possible to provide the bend compensation of the upper beam during edging. During edging, as the hydraulic cylinders press on the ends of theupper frame plate 31, theupper frame plate 31 tends vertically to bend to an arc, in which case the bending applies a tensional force on the oblique reaction bars 36, via which the force is transmitted via the crowningcylinders 39 and theupper reaction lever 37 to theupper frame plate 31, providing a force that tends to straighten the bend. This way, theupper frame plate 31 and the upper edging tool mounted on the lower edge thereof can be made to remain straight. - In the embodiment of
Fig. 7a the crowningcylinders 39 have been replaced by vertical reaction levers 40 andwedge pieces 41. Two vertical reaction levers 40 are supported between theupper reaction plate 35 and theupper reaction lever 37 at a distance from each other and from the mountingtenons 34 of the upper frame plate.Wedge pieces 41 can be disposed between the vertical reaction levers 40 and the upper edge of theupper reaction plate 35, in which case the bend compensation of the upper beam can be provided by prestressing the upper beam with the wedge pieces of a suitable size to an arc which is straightened by the effect of edging force. - The invention is not limited merely to the exemplifying embodiments referred to above; instead, many variations are possible within the scope of the inventive idea defined by the claims.
Claims (20)
- A method for forming the body of a press brake, the method comprising- forming a pair of faces (1)- forming a lower beam (2)- forming an upper beam (3)- supporting the lower beam (2) on the faces (1) to be stationary, and- supporting the upper beam (3) on the faces (1) to be moved vertically relative to the lower beam,
c h a r a c t e r i z e d in that- the faces (1), the lower beam (2) and the upper beam (3) are assembled from separate plate, plate pile and/or bar parts including tensile elements (4, 25, 36) mainly receiving tensional load, press elements (5, 20, 24, 31) receiving press loads, and transmission elements (6, 7, 26, 28, 29, 35, 37) between tensile elements and press elements in order to transmit forces therebetween, and- the tensile elements, the press elements and the transmission elements are connected to each other by mechanical connection elements (8, 9, 10, 11, 19, 23, 27, 34, 38) without welding. - A press brake, including- a pair of faces (1) at the ends of the press brake,- a lower beam (2) supported on the faces to be stationary,- an upper beam (3) supported on the faces to be moved vertically relative to the lower beam, characterized in that the faces (1), the lower beam (2) and the upper beam (3) are each assembled from separate plate, plate pile and/or bar parts including tensile elements (4, 25, 36) receiving tensional loads, press elements (5, 20, 24, 31) receiving press loads, and transmission elements (6, 7, 26, 28, 29, 35, 37) between tensile elements and press elements in order to transmit forces therebetween, the tensile elements, the press elements and the transmission elements being connected to each other by mechanical connection elements (8, 9, 10, 11, 19, 23, 27, 34, 38) without welded connections.
- The press brake according to claim 2, characterized in that the mechanical connection elements are clip connections (8, 9, 10, 11), mortise and tenon connections (19, 23, 34), locking piece connections (27, 38) and/or screw connections.
- The press brake according to claim 3, characterized in that a locking piece connection (27, 38) includes a rectangular aperture on the plate, plate pile and/or bar part and an elongated parallelepiped piece having a rectangular cross section that is fitted in the aperture.
- The press brake according to any one of claims 2 to 4, characterized in that the length of any plate, plate pile and/or bar part included in the body of the press brake is smaller than the length of the largest standard freight container.
- The press brake according to claim 5, characterized in that the length of any plate, plate pile and/or bar part included in the body of the press brake is smaller than the length of a 45FT h/c freight container (13.56m).
- The press brake according to any one of claims 2 to 6, characterized in that the press brake has a press force on the order of 600tn or more.
- The press brake according to any one of claims 2 to 7, characterized in that the face (1) includes- a vertical tensile bar (4) fitted as close to the lower beam (2) and the upper beam (3) as possible in order to receive the tensional loads during edging,- a vertical back post (5) spaced apart from the tensile bar and adapted to receive the press loads during edging,- an upper lever (6) connected to the upper end of the tensile bar and the back post in order to transmit forces between the tensile bar and the back post, and- a lower lever (7) connected to the lower end of the tensile bar and the back post in order to transmit forces between the tensile bar and the back post.
- The press brake according to claim 8, characterized in that the tensile bar (4) is assembled from a pile of steel sheets (41...44) disposed one on the other.
- The press brake according to claim 8 or 9, characterized in that the tensile bar (4) includes upper clip connection elements (8) at the upper end of the tensile bar on opposed sides of the tensile bar, and
lower clip connection elements (9) at the lower end of the tensile bar on opposed sides of the tensile bar.. - The press brake according to claim 10, characterized in that the upper lever (6) is formed by two identical upper lever plate halves (61, 62) on opposed sides of the tensile bar (4), each upper lever plate half including first apertures (10) adapted to receive the upper clip connection elements (8) therein.
- The press brake according to claim 10 or 11, characterized in that the lower lever (7) is formed by two identical lower lever plate halves (71, 72) on opposed sides of the tensile bar (4), each lower lever plate half including second apertures (11) adapted to receive the lower clip connection elements (9) therein.
- The press brake according to any one of claims 8 to 12, characterized in that the face (1) includes a pair of side plates (12, 13) provided on each side of the back post (5) and mounted to the back post, the tensile bar (4) and the lower lever (7) for sideward support of the back post.
- The press brake according to any one of claims 8 to 13, characterized in that the face (1) includes a body element (14) to be supported against a base, including a vertical column (15) on which a mounting element (16) is mounted, the mounting element including
a first tenon part (17) that extends from the column (15) horizontally in a first direction and can be fitted in a hole (18) at the lower end of the tensile bar (4), and
a second tenon part (19) that extends from the column (15) horizontally in a second direction opposed relative to the first direction, wherein the lower beam (2) can be supported on the second tenon part. - The press brake according to claim 14, characterized in that the lower beam (2) includes- a pair of lower frame plates (20), each having an upper edge (21) and a lower edge (22) in parallel to each other, with holes (23) being disposed in the vicinity of the ends of the lower frame plates in order to receive the second tenon part (19) in the holes,- a table (24) mounted on the upper edges (21) of the lower frame plates, wherein the lower edging tool may be supported on the table,- a pair of lower oblique reaction bars (25) in an upwards opening V-shape to each other, both being pivotally bearing-mounted at the upper end to the second tenon part (19), and- a lower reaction lever (26), the ends of which have been rigidly connected by locking piece connections (27) to the lower ends of the lower oblique reaction bars (25) in order to couple the lower ends of the oblique reaction bars to each other, wherein the lower reaction lever is formed by two planar lower reaction lever halves (261, 262), the lower ends of the lower oblique reaction bars being fitted therebetween.
- The press brake according to claim 15, characterized in that the lower beam (2) includes- two vertical reaction levers (28) supported on the upper edge of the lower reaction lever halves (261, 262) at a distance from each other and from the holes (23), and- wedge pieces (29) that can be disposed between the vertical reaction levers (28) and the lower edges (22) of the lower frame plates, in which case the bend compensation of the lower beam may be provided by prestressing the lower beam by the wedge pieces of a suitable size to an arc which is straightened by the effect of edging force.
- The press brake according to claim 15, characterized in that the lower beam (2) includes two crowning cylinders (30) supported on the upper edge of the lower reaction lever halves (261, 262) at a distance from each other and from the holes (23), in which case the bend compensation of the lower beam can be provided by prestressing the lower beam by the crowning cylinders.
- The press brake according to any one of claims 2 to 15, characterized in that the upper beam (3) includes- an upper frame plate (31) having a long upper edge (32) and a long lower edge (33) in parallel to each other, the upper edging tool being mountable on the lower edge and mounting tenons (34) being disposed in the vicinity of the ends of the upper frame plate and protruding from the upper frame plate on both sides thereof,- an upper reaction plate (35) on the upper edge (32) of the upper frame plate, and- a pair of upper oblique reaction bars (36) in a downwards opening V-shape to each other, both being pivotally bearing-mounted at the lower end to the mounting tenons (34), wherein the oblique reaction bars are formed by two planar upper reaction bar halves (361, 362), and- an upper reaction lever (37) rigidly mounted by locking piece connections (38) to the upper ends of the oblique reaction bars (36) in order to couple the upper ends of the oblique reaction bars to each other.
- The press brake according to claim 18, characterized in that the upper beam (3) includes two hydraulic crowning cylinders (39) in order to provide the bend compensation of the upper beam, the cylinders being provided between the upper reaction plate (35) and the upper reaction lever (37) at a distance from each other and from the mounting tenons (34) of the upper frame plate.
- The press brake according to claim 18, characterized in that the upper beam (3) includes- two vertical reaction levers (40) supported between the upper reaction plate (35) and the upper reaction lever (37) at a distance from each other and from the mounting tenons (34) of the upper frame plate, and- wedge pieces (41) which can be disposed between the vertical reaction levers (40) and the upper edge of the upper reaction plate (35), in which case the bend compensation of the upper beam can be provided by prestressing the upper beam with the wedge pieces of a suitable size to an arc which is straightened by the effect of edging force.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20096314A FI125471B (en) | 2009-12-11 | 2009-12-11 | A method of forming a press press body and a press press |
PCT/FI2010/050971 WO2011070232A1 (en) | 2009-12-11 | 2010-11-29 | Method for forming the body of a press brake, and a press brake |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2509724A1 EP2509724A1 (en) | 2012-10-17 |
EP2509724A4 EP2509724A4 (en) | 2014-05-28 |
EP2509724B1 true EP2509724B1 (en) | 2015-11-04 |
Family
ID=41462778
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10835550.4A Not-in-force EP2509724B1 (en) | 2009-12-11 | 2010-11-29 | Method for forming the body of a press brake, and a press brake |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2509724B1 (en) |
FI (2) | FI125471B (en) |
RU (1) | RU2552615C2 (en) |
WO (1) | WO2011070232A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112059457A (en) * | 2020-09-07 | 2020-12-11 | 中国船舶重工集团柴油机有限公司 | Welding method and manufacturing process of press body |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT516493B1 (en) * | 2015-02-25 | 2016-06-15 | Trumpf Maschinen Austria Gmbh & Co Kg | press brake |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7415857B1 (en) * | 2005-06-24 | 2008-08-26 | Davor Petricio Yaksic | Plate bending machines and methods |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3418922A (en) * | 1967-01-03 | 1968-12-31 | Barogenics Inc | Load-bearing frame structure |
DE2218419C2 (en) * | 1972-04-13 | 1973-10-25 | Mannesmann-Meer Ag, 4050 Moenchengladbach | Bending press, especially for a plant for the production of large pipes |
US5027638A (en) * | 1990-06-22 | 1991-07-02 | Friestad Roland W | Force-resisting structure |
AT504640B1 (en) * | 2007-06-20 | 2008-07-15 | Trumpf Maschinen Austria Gmbh | Bending machine i.e. folding press, has control element drive-connected to beam by connecting element, and another control element drive-connected to frame or to table in or below horizontal reference plane running through support surface |
-
2009
- 2009-12-11 FI FI20096314A patent/FI125471B/en not_active IP Right Cessation
-
2010
- 2010-05-27 FI FI20105601A patent/FI20105601A/en not_active Application Discontinuation
- 2010-11-29 EP EP10835550.4A patent/EP2509724B1/en not_active Not-in-force
- 2010-11-29 WO PCT/FI2010/050971 patent/WO2011070232A1/en active Application Filing
- 2010-11-29 RU RU2012126405/02A patent/RU2552615C2/en not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7415857B1 (en) * | 2005-06-24 | 2008-08-26 | Davor Petricio Yaksic | Plate bending machines and methods |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112059457A (en) * | 2020-09-07 | 2020-12-11 | 中国船舶重工集团柴油机有限公司 | Welding method and manufacturing process of press body |
Also Published As
Publication number | Publication date |
---|---|
FI20096314A (en) | 2011-06-12 |
EP2509724A4 (en) | 2014-05-28 |
RU2552615C2 (en) | 2015-06-10 |
WO2011070232A1 (en) | 2011-06-16 |
FI20105601A0 (en) | 2010-05-27 |
FI20096314A0 (en) | 2009-12-11 |
FI125471B (en) | 2015-10-15 |
RU2012126405A (en) | 2014-01-20 |
FI20105601A (en) | 2011-06-12 |
EP2509724A1 (en) | 2012-10-17 |
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