CA2080881C - Bending-shaping machine having multiple working levels - Google Patents
Bending-shaping machine having multiple working levels Download PDFInfo
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- CA2080881C CA2080881C CA002080881A CA2080881A CA2080881C CA 2080881 C CA2080881 C CA 2080881C CA 002080881 A CA002080881 A CA 002080881A CA 2080881 A CA2080881 A CA 2080881A CA 2080881 C CA2080881 C CA 2080881C
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- bending
- unit
- downstream
- section
- sections
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- 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
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
- B21D11/12—Bending specially adapted to produce specific articles, e.g. leaf springs the articles being reinforcements for concrete
Abstract
Bending-shaping machine for sections with a bending unit (12) located downstream of an assembly (14) that draws and/or straightens sections (15), a shearing unit (11) being interposed, in which machine a drawing unit (13) is comprised downstream of the bending unit (12) and on the same axis as the section (15) and has a first normal working position (13N) and a second downwardly retracted position (13S), the bending unit (12) being movable between a first normal working position level with the working positron of the drawing position and a second retracted position below this working position, and having a third raised working position (12A) with a section (15) positioned above the assembly (14) that draws and/or straightens sections (15).
Description
1 "BENDING-SHAPING MACHINE HAVING MULTIPLE WORKING LEVELS"
2 *****
3 This invention concerns a bending-shaping machine having 4 multiple working levels.
The bending-shaping machine of this invention is applied 6 properly to the field of processing sections for reinforced 7 concrete, whet=her those sections are obtained from straight bars 8 or wound rolls and whether the sections have a round, square, 9 polygonal or other cross section.
The bending-shaping machine to which the invention is 11 applied has a vertical or almost vertical or, in any event, 12 inclined working surface, and the working surface can often be 13 oriented from the horizontal to the veertical.
14 To be more exact, the bending-shaping machine according to the invention performs the bending of steel bars for building 16 work and is especially suitable to bend long steel bars or 17 complex stirrups.
18 Considerable difficulties are encountered in bending complex 19 stirrups and steel bars of a great length with bending-shaping machines.
21 In fact with the bending-shaping machines of the state of 22 the art it is impossible to bend the trailing end of complex 23 stirrups without these complex stirrups coming into contact 24 during processing with the shearing unit or with the drawing and/or straightening assembly located upstream of the bending 26 unit.
27 In the same way it is impossible to make certain bends in 28 the trailing ends of long steel bars since the bars c ome into 29 contact with the shearing unit or with the drawing and/or straightening assembly located upstream of the bending unit of 31 the bending-shaping machine.
32 This fact restricts the production capacity of the bending-33 shaping machines of the state of the art considerably.
1 Canadian Patent Application CA 2,007,984 laid open on July 2 18, 1990 discloses a bending-shaping machine with a shearing unit 3 which can be retracted below the working surface, so that bends 4 can also be made in complex stirrups and long steel bars. This movement of retraction of the shearing unit can be achieved with 6 complex mechanisms which require burdensome maintenance work and 7 difficulties in installation and setting-up and relatively long 8 cycle times.
9 Canadian Patent Application CA 2,05?,783 laid open on June 18, 1992 discloses a bending-shaping machine which is the basis 11 of this invention. This bending-shaping machine entails the 12 drawback that the bends in the trailing ends of sections have to 13 have a modest length.
14 The present applicants have designed, tested and embodied this invention to obviate the shortcomings of the state of the 16 art and to achieve further advantages.
17 This invention consists in providing a bending-shaping 18 machine wherein the bending unit has two working levels and one 19 non-working level, which enable steel bars for building work to be produced with any shape and length and without these steel 21 bars coming into contact, during the bending steps, with the 22 shearing unit or with the drawing andjor straightening assembly.
23 In particular, this invention enables bends to be made in 24 the trailing end of complex stirrups and long steel bars without the stirrups and bars coming into contact with the shearing unit 26 or with the drawing and/or straightening assembly of the bending-2? shaping machine.
28 Moreover, the bending-shaping machine of this invention 29 makes possible less care by the machine operator, operating facility and therefore shorter cycle times.
31 According to a first embodiment of the invention the _2080881 1 bending unit has a first normal working position at the 2 level of the working surface, a possible second position of 3 total or partial retraction below the working surface and a 9 third raised position above the working surface.
As is known, the bending unit makes the bend in its first 6 normal working position, whereas the second downwardly 7 retracted position is necessary to be able to carry out 8 inversion of the bend (from anticlockwise to clockwise or 9 viceversa).
The third raised working position enables bends to be made 11 in the trailing ends of long steel bars or complex stirrups 12 without the long bars or complex stirrups coming into 13 contact with the shearing unit or the drawing and/or 14 straightening assembly located immediately upstream of the bending unit.
16 When the bending unit is in its third raised position, the 17 downstream drawing unit is located in its first normal 18 working position at the level of the working surface, while 19 the steel bar being processed bends owing to its flexibility and cooperates with the drawing unit downstream.
21 According to a variant the downstream drawing unit has a 22 third position raised above the working surface at a level 23 which corresponds advantageously with the level of the third 24 raised position of the bending unit.
In this way, when the bending unit is in its third raised 26 position, the drawing unit too is in its third raised 27 position, so that the steel bar cooperates in a linear 28 manner with the drawing unit and bending unit. This variant 29 is especially suitable for bars of a great diameter which are not very flexible.
31 The positioning of the drawing unit and bending unit can 32 be accomplished either with a three-positional jack or with 33 a threaded bolt or with other means suitable for the - q - 2080881 1 purpose.
2 According to a second embodiment of the invention the 3 bending-shaping machine according to the invention comprises 9 gripping and guide elements located downstream of the bending unit and on the same axis as the section being 6 processed.
7 These gripping and guide elements have a second normal 8 working position at the level of the working surface, a 9 first downwardly retracted position and a third position raised above the working surface.
11 The gripping and guide elements have a first position for 12 clamping the section and a second position for semiclamping 13 the section, with the section able to slide axially and 14 being guided by the gripping and guide elements.
The main purpose of these gripping and guide elements is 16 to raise the section above the shearing unit and above the 17 drawing and/or straightening assembly positioned upstream of 18 the bending unit.
19 Thus, the bending unit takes up its third raised position and can make bends in the trailing end of the section 21 without causing contact with the shearing unit and the 22 drawing and/or straightening assembly.
23 During the bending step the gripping and guide elements 29 can stay in their third raised position or be placed in their second normal working position.
26 According to a variant the bending-shaping machine 27 according to the invention comprises suitable supporting and 28 guide means to support the section and convey it in the 29 right direction in cooperation with the drawing unit downstream.
31 These supporting and guide means too have a first normal 32 working position, a second downwardly retracted position and 33 a third position raised above the working surface.
_ 5 1 The attached figures, which are given as a non-restrictive 2 example, show two embodiments of the invention as follows:-3 Figs.l to 7 are diagrams of a bending cycle according to a 4 f ir;~t embodiment of the invention, in which the Figs .
"a" show a front view of a bending-shaping machine 6 according to the invention, whereas the Figs. "b" show 7 the relative cross sections;
8 Fig.5c shows a variant of the lay-out of Fig.5b;
9 Figs.8 to 14 are diagrams of a bending cycle according to a second embodiment of the invention, in which the Figs.
11 "a" show a front view of a bending-shaping machine 12 according to the invention, whereas the Figs. "b" show 13 the relative cross sections.
14 A bending-shaping machine 10 of this invention comprises a shearing unit 11, a bending unit 12, a drawing and/or 16 straightening assembly 14 positioned upstream of the bending unit 17 12, and a drawing unit 13 positioned downstream of the bending 18 unit 12.
19 In this case the bending unit 12 comprises a bending disk 19 to which an abutment roll 17 and bending pin 18 are secured; the 21 bending unit .L2 is normally located downstream of and near to the 22 shearing unit 11.
23 The shearing unit 11 is connected laterally by a curved 24 surface to a working surface 16.
The shearing unit 11 and the drawing and/or straightening 26 assembly 14 are positioned within a protective cover 20 of a 27 known type.
28 The bending unit 12 according to the invention has a first 29 normal working position 12N level with the working surface 16, a second retracted position 12S below the working surface 16 and a 31 third raised position 12A above the working surface 16.
32 In this example the drawing unit :13 has three 1 positions, namely a first normal working position 13N level 2 with the working surface 16, a second downwardly retracted 3 position 13S and a third raised position 13A.
4 The shearing unit 11 according to the invention advantageously has only one single working position.
6 In Figs.1 the drawing and/or straightening assembly 19 7 positions a section 15 in a required position and the 8 bending unit 12 makes a first bend in the leading end of the 9 section 15, while the downstream drawing unit 13 is in its second retracted position 13S so as not to come into contact 11 with the section 15 while the latter is being bent and is 12 being fed fowards by the drawing and/or straightening 13 assembly 14.
14 Thereafter the drawing and/or straightening assembly 14 displaces the section 15 containing its first bend forwards 16 by a desired length.
17 Next, the bending unit 12 is displaced to its second 18 retracted position 12S (not shown), in which it is moved 19 sideways in a known manner to enable the abutment roll 17 to be positioned on the other side of the section 15 so as to 21 make an inverted bend.
22 The bending unit 12 is then re-positioned (Figs.2) in its 23 first normal working position 12N and makes the second bend, 24 an anticlockwise bend in this case, in the leading end of the section 15.
26 Figs.3 show the drawing and/or straightening assembly 14, 27 which feeds the section 15 forwards by a required length;
28 next, the downstream drawing unit 13 takes up its first 29 normal working position 13N and grips the section 15 (Fig.3b).
31 The bending-shaping machine 10 according to the invention 32 comprises also a supporting channel 23 to support the 33 section 15. This supporting channel 23 can take up a first 1 normal working position 23N, a second downwardly retracted 2 position 235, and a third raised position 23A.
3 While the bends are made in the leading end of the section 4 15, the supporting channel 23 lies in its second retracted position 23S so as not to come into contact with the section 6 15 being processed.
7 In this step of the disclosed bending cycle the supporting 8 channel 23 (Figs.3) is moved from its second retracted 9 position 23S to its first normal working position 23N.
Next, the shearing unit 11 shears the section 15 to size, 11 the section 15 being gripped by the downstream drawing unit 12 13.
13 After the section 15 has been sheared to size, the 14 downstream drawing unit 13 feeds the sheared section 15 forwards by a desired length so as to prevent contact with 16 the shearing unit 11 (Figs.4).
17 Next, the downstream drawing unit 13 is positioned in its 18 third raised position 13A (Fig.4b) and the bending unit 12 19 is positioned in its third raised position 12A (Fig.5b).
According to the variant of Fig.Sc the downstream drawing 21 unit 13 has only two positions, namely a first normal 22 working position 13N level with the working surface 16 and a 23 second downwardly retracted position 135. In such a case 24 the section 15 being processed cooperates with the bending unit 12 in the third raised position 12A of the latter 12 26 and with the drawing unit 13 in the first normal working 27 position 13N of the latter 13 owing to the flexibility of 28 the section 15. This variant is especially suitable for 29 sections 15 having a small cross section.
In continuation of the description of the bending cycle 31 according to the invention, the downstream drawing unit 13 32 displaces the section 15 upstream by a desired length.
33 The bending unit 12 now makes the first bend in the 1 trailing end of the section 15 without the section 15 coming 2 into contact with the shearing unit 11 and drawing and/or 3 straightening assembly 14 (Figs.6).
4 Thereafter the downstream drawing unit 13 displaces the section 15 upstream again by a desired length without the 6 section 15 coming into contact with the units or assemblies 7 upstream of the bending unit 12.
8 Next, the bending unit 12 in its raised position 12A
9 makes the second bend in the trailing end of the section 15 without the section 15 coming into contact with the shearing 11 unit 11 and the drawing and/or straightening assembly 14 12 (Figs.7).
13 Figs.B to 14 show a second embodiment of the invention.
19 Figs.8 show a step in which, after the section 15 has been fed forwards by a required length by the drawing and/or 16 straightening assembly 14, the bending unit 12 makes a first 17 bend, a clockwise bend in this case, in the leading end of 18 the section 15.
19 In this step the downstream drawing unit 13 is in its second retracted position 13S, while the bending unit 12 is 21 in its first normal working position 12N.
22 According to this second embodiment the bending-shaping 23 machine 10 comprises a gripping and guide element 21, which 29 can take up a second normal working position 21N, a first downwardly retracted position 21S and a third raised 26 position 21A.
27 In this example a supporting switch 22 and a supporting 28 channel 23 are also comprised and can take up first normal 29 working positions 22N-23N and second downwardly retracted positions 22S-23S.
31 During the making of the first bend in the leading end of 32 the section 15 (Figs.8) the gripping and guide element 21, 33 the supporting switch 22 and the supporting channel 23 are _ g 1 in their respective retracted positions 21S-22S and 23S so as not 2 to hinder the making of the first bend in the leading end of the 3 section 15.
4 Next, the drawing and/or straightening assembly 14 feeds the section 15 forward by the required ler:~gth.
6 The bending unit 12, after having taken up its second 7 retracted position 12S (not shown) so as to enable the abutment 8 roll 17 to be transferred sideways, takes up its first normal 9 working position 12N to make the second bend in the leading end of the section 15.
11 Figs.9 show the section 15, which has undergone the second 12 bend in its leading end, an anticlockwise bend in this case.
13 During this step the downstream drawing unit :13 is in its 14 second retracted position 135; the gripping and guide element 21, the supporting switch 22 and the supporting channel 23 are also 16 in their respective retracted positions 21S-22S--23S so as not to 17 hinder the making of the second bend. in the leading end of the 18 section 15.
19 After the making of these two bends, each one of which may consist of one or more bends, in its leading end the section 15 21 is fed forwards by a desired length by the drawing and/or 22 straightening assembly 14, while the downstream drawing unit 13 23 and the gripping and guide element 21 are in their retracted 24 positions 13S-21S and the supporting switch 22 is in its normal working position 22N so as to support the section 15.
26 The section 15, when it has been fed forwards by the desired 27 length, cooperates with the downstream drawing unit 13, which has 28 taken up its :First normal working position 13N (Figs.l0).
29 The supporting channel 23, after it has been surpassed by the bent leading portion of the section 15, can take up its 31 normal working position 23N so as to support the section 15.
- 1~ - 2080881 1 The gripping and guide element 21 now takes up its second 2 normal working position 21N and grips the section 15 3 (Figs.ll); the section 15 is then sheared to size.
4 The section 15 is then fed forwards by the downstream drawing unit 13 by a required length suitable to prevent 6 contact with the shearing unit 11 during the next step 7 (Figs.l2), 8 The gripping and guide element 21 now takes up its third 9 raised position 21A (Fig.l2b) and compels the section 15 to be raised above the upstream protective cover 20 to a 11 position beyond the shearing unit 11.
12 Thereafter the downstream drawing unit 13 is actuated and 13 displaces the section 15 upstream by a desired length, while 14 the gripping and guide element 21 is in its raised but not clamping position 21A so as to enable the section 15 to 16 slide; next, the bending unit 12 is displaced to its raised 17 position 12A, while the gripping and guide element 21 takes 18 up its normal working position 21N and clamps the section 19 15, thus ensuring that the section 15 is positioned on the bending unit 12 and also maintaining a position of contact 21 with the working surface 16 (Figs.l3).
22 The bending unit 12 is then actuated and makes a bend, a 23 clockwise bend in this case, in the trailing end of the 29 section 15 Without the section 15 coming into contact with the shearing unit 11 or with the drawing and/or 26 straightening assembly 14.
27 The bending unit 12 takes up again its first normal 28 working position and the gripping and guideelement 12N, 21 29 takes up its raised to assist position 21A so as disengagement of section 15 from the abutment the roll 17 31 and bending pin and then takes up again a position 32 suitable for a further the section upstream displacement of 33 15 by the downstreamdrawing unit 13 (Figs.l4).
~ososs~
1 The downstream drawing unit 13 and the gripping and guide 2 element 21, after all the bends in the trailing end of the 3 section 15 have been made, take up their relative retracted 9 positions 13S and 215.
According to a variant which is not shown the supporting 6 switch 22 can take up a third raised position 22A so as to 7 support the section 15 also in steps in which the gripping 8 and guide element 21 is in its raised position 21A and the 9 downstream drawing unit 13 is displacing the section 15.
The bending-shaping machine of this invention is applied 6 properly to the field of processing sections for reinforced 7 concrete, whet=her those sections are obtained from straight bars 8 or wound rolls and whether the sections have a round, square, 9 polygonal or other cross section.
The bending-shaping machine to which the invention is 11 applied has a vertical or almost vertical or, in any event, 12 inclined working surface, and the working surface can often be 13 oriented from the horizontal to the veertical.
14 To be more exact, the bending-shaping machine according to the invention performs the bending of steel bars for building 16 work and is especially suitable to bend long steel bars or 17 complex stirrups.
18 Considerable difficulties are encountered in bending complex 19 stirrups and steel bars of a great length with bending-shaping machines.
21 In fact with the bending-shaping machines of the state of 22 the art it is impossible to bend the trailing end of complex 23 stirrups without these complex stirrups coming into contact 24 during processing with the shearing unit or with the drawing and/or straightening assembly located upstream of the bending 26 unit.
27 In the same way it is impossible to make certain bends in 28 the trailing ends of long steel bars since the bars c ome into 29 contact with the shearing unit or with the drawing and/or straightening assembly located upstream of the bending unit of 31 the bending-shaping machine.
32 This fact restricts the production capacity of the bending-33 shaping machines of the state of the art considerably.
1 Canadian Patent Application CA 2,007,984 laid open on July 2 18, 1990 discloses a bending-shaping machine with a shearing unit 3 which can be retracted below the working surface, so that bends 4 can also be made in complex stirrups and long steel bars. This movement of retraction of the shearing unit can be achieved with 6 complex mechanisms which require burdensome maintenance work and 7 difficulties in installation and setting-up and relatively long 8 cycle times.
9 Canadian Patent Application CA 2,05?,783 laid open on June 18, 1992 discloses a bending-shaping machine which is the basis 11 of this invention. This bending-shaping machine entails the 12 drawback that the bends in the trailing ends of sections have to 13 have a modest length.
14 The present applicants have designed, tested and embodied this invention to obviate the shortcomings of the state of the 16 art and to achieve further advantages.
17 This invention consists in providing a bending-shaping 18 machine wherein the bending unit has two working levels and one 19 non-working level, which enable steel bars for building work to be produced with any shape and length and without these steel 21 bars coming into contact, during the bending steps, with the 22 shearing unit or with the drawing andjor straightening assembly.
23 In particular, this invention enables bends to be made in 24 the trailing end of complex stirrups and long steel bars without the stirrups and bars coming into contact with the shearing unit 26 or with the drawing and/or straightening assembly of the bending-2? shaping machine.
28 Moreover, the bending-shaping machine of this invention 29 makes possible less care by the machine operator, operating facility and therefore shorter cycle times.
31 According to a first embodiment of the invention the _2080881 1 bending unit has a first normal working position at the 2 level of the working surface, a possible second position of 3 total or partial retraction below the working surface and a 9 third raised position above the working surface.
As is known, the bending unit makes the bend in its first 6 normal working position, whereas the second downwardly 7 retracted position is necessary to be able to carry out 8 inversion of the bend (from anticlockwise to clockwise or 9 viceversa).
The third raised working position enables bends to be made 11 in the trailing ends of long steel bars or complex stirrups 12 without the long bars or complex stirrups coming into 13 contact with the shearing unit or the drawing and/or 14 straightening assembly located immediately upstream of the bending unit.
16 When the bending unit is in its third raised position, the 17 downstream drawing unit is located in its first normal 18 working position at the level of the working surface, while 19 the steel bar being processed bends owing to its flexibility and cooperates with the drawing unit downstream.
21 According to a variant the downstream drawing unit has a 22 third position raised above the working surface at a level 23 which corresponds advantageously with the level of the third 24 raised position of the bending unit.
In this way, when the bending unit is in its third raised 26 position, the drawing unit too is in its third raised 27 position, so that the steel bar cooperates in a linear 28 manner with the drawing unit and bending unit. This variant 29 is especially suitable for bars of a great diameter which are not very flexible.
31 The positioning of the drawing unit and bending unit can 32 be accomplished either with a three-positional jack or with 33 a threaded bolt or with other means suitable for the - q - 2080881 1 purpose.
2 According to a second embodiment of the invention the 3 bending-shaping machine according to the invention comprises 9 gripping and guide elements located downstream of the bending unit and on the same axis as the section being 6 processed.
7 These gripping and guide elements have a second normal 8 working position at the level of the working surface, a 9 first downwardly retracted position and a third position raised above the working surface.
11 The gripping and guide elements have a first position for 12 clamping the section and a second position for semiclamping 13 the section, with the section able to slide axially and 14 being guided by the gripping and guide elements.
The main purpose of these gripping and guide elements is 16 to raise the section above the shearing unit and above the 17 drawing and/or straightening assembly positioned upstream of 18 the bending unit.
19 Thus, the bending unit takes up its third raised position and can make bends in the trailing end of the section 21 without causing contact with the shearing unit and the 22 drawing and/or straightening assembly.
23 During the bending step the gripping and guide elements 29 can stay in their third raised position or be placed in their second normal working position.
26 According to a variant the bending-shaping machine 27 according to the invention comprises suitable supporting and 28 guide means to support the section and convey it in the 29 right direction in cooperation with the drawing unit downstream.
31 These supporting and guide means too have a first normal 32 working position, a second downwardly retracted position and 33 a third position raised above the working surface.
_ 5 1 The attached figures, which are given as a non-restrictive 2 example, show two embodiments of the invention as follows:-3 Figs.l to 7 are diagrams of a bending cycle according to a 4 f ir;~t embodiment of the invention, in which the Figs .
"a" show a front view of a bending-shaping machine 6 according to the invention, whereas the Figs. "b" show 7 the relative cross sections;
8 Fig.5c shows a variant of the lay-out of Fig.5b;
9 Figs.8 to 14 are diagrams of a bending cycle according to a second embodiment of the invention, in which the Figs.
11 "a" show a front view of a bending-shaping machine 12 according to the invention, whereas the Figs. "b" show 13 the relative cross sections.
14 A bending-shaping machine 10 of this invention comprises a shearing unit 11, a bending unit 12, a drawing and/or 16 straightening assembly 14 positioned upstream of the bending unit 17 12, and a drawing unit 13 positioned downstream of the bending 18 unit 12.
19 In this case the bending unit 12 comprises a bending disk 19 to which an abutment roll 17 and bending pin 18 are secured; the 21 bending unit .L2 is normally located downstream of and near to the 22 shearing unit 11.
23 The shearing unit 11 is connected laterally by a curved 24 surface to a working surface 16.
The shearing unit 11 and the drawing and/or straightening 26 assembly 14 are positioned within a protective cover 20 of a 27 known type.
28 The bending unit 12 according to the invention has a first 29 normal working position 12N level with the working surface 16, a second retracted position 12S below the working surface 16 and a 31 third raised position 12A above the working surface 16.
32 In this example the drawing unit :13 has three 1 positions, namely a first normal working position 13N level 2 with the working surface 16, a second downwardly retracted 3 position 13S and a third raised position 13A.
4 The shearing unit 11 according to the invention advantageously has only one single working position.
6 In Figs.1 the drawing and/or straightening assembly 19 7 positions a section 15 in a required position and the 8 bending unit 12 makes a first bend in the leading end of the 9 section 15, while the downstream drawing unit 13 is in its second retracted position 13S so as not to come into contact 11 with the section 15 while the latter is being bent and is 12 being fed fowards by the drawing and/or straightening 13 assembly 14.
14 Thereafter the drawing and/or straightening assembly 14 displaces the section 15 containing its first bend forwards 16 by a desired length.
17 Next, the bending unit 12 is displaced to its second 18 retracted position 12S (not shown), in which it is moved 19 sideways in a known manner to enable the abutment roll 17 to be positioned on the other side of the section 15 so as to 21 make an inverted bend.
22 The bending unit 12 is then re-positioned (Figs.2) in its 23 first normal working position 12N and makes the second bend, 24 an anticlockwise bend in this case, in the leading end of the section 15.
26 Figs.3 show the drawing and/or straightening assembly 14, 27 which feeds the section 15 forwards by a required length;
28 next, the downstream drawing unit 13 takes up its first 29 normal working position 13N and grips the section 15 (Fig.3b).
31 The bending-shaping machine 10 according to the invention 32 comprises also a supporting channel 23 to support the 33 section 15. This supporting channel 23 can take up a first 1 normal working position 23N, a second downwardly retracted 2 position 235, and a third raised position 23A.
3 While the bends are made in the leading end of the section 4 15, the supporting channel 23 lies in its second retracted position 23S so as not to come into contact with the section 6 15 being processed.
7 In this step of the disclosed bending cycle the supporting 8 channel 23 (Figs.3) is moved from its second retracted 9 position 23S to its first normal working position 23N.
Next, the shearing unit 11 shears the section 15 to size, 11 the section 15 being gripped by the downstream drawing unit 12 13.
13 After the section 15 has been sheared to size, the 14 downstream drawing unit 13 feeds the sheared section 15 forwards by a desired length so as to prevent contact with 16 the shearing unit 11 (Figs.4).
17 Next, the downstream drawing unit 13 is positioned in its 18 third raised position 13A (Fig.4b) and the bending unit 12 19 is positioned in its third raised position 12A (Fig.5b).
According to the variant of Fig.Sc the downstream drawing 21 unit 13 has only two positions, namely a first normal 22 working position 13N level with the working surface 16 and a 23 second downwardly retracted position 135. In such a case 24 the section 15 being processed cooperates with the bending unit 12 in the third raised position 12A of the latter 12 26 and with the drawing unit 13 in the first normal working 27 position 13N of the latter 13 owing to the flexibility of 28 the section 15. This variant is especially suitable for 29 sections 15 having a small cross section.
In continuation of the description of the bending cycle 31 according to the invention, the downstream drawing unit 13 32 displaces the section 15 upstream by a desired length.
33 The bending unit 12 now makes the first bend in the 1 trailing end of the section 15 without the section 15 coming 2 into contact with the shearing unit 11 and drawing and/or 3 straightening assembly 14 (Figs.6).
4 Thereafter the downstream drawing unit 13 displaces the section 15 upstream again by a desired length without the 6 section 15 coming into contact with the units or assemblies 7 upstream of the bending unit 12.
8 Next, the bending unit 12 in its raised position 12A
9 makes the second bend in the trailing end of the section 15 without the section 15 coming into contact with the shearing 11 unit 11 and the drawing and/or straightening assembly 14 12 (Figs.7).
13 Figs.B to 14 show a second embodiment of the invention.
19 Figs.8 show a step in which, after the section 15 has been fed forwards by a required length by the drawing and/or 16 straightening assembly 14, the bending unit 12 makes a first 17 bend, a clockwise bend in this case, in the leading end of 18 the section 15.
19 In this step the downstream drawing unit 13 is in its second retracted position 13S, while the bending unit 12 is 21 in its first normal working position 12N.
22 According to this second embodiment the bending-shaping 23 machine 10 comprises a gripping and guide element 21, which 29 can take up a second normal working position 21N, a first downwardly retracted position 21S and a third raised 26 position 21A.
27 In this example a supporting switch 22 and a supporting 28 channel 23 are also comprised and can take up first normal 29 working positions 22N-23N and second downwardly retracted positions 22S-23S.
31 During the making of the first bend in the leading end of 32 the section 15 (Figs.8) the gripping and guide element 21, 33 the supporting switch 22 and the supporting channel 23 are _ g 1 in their respective retracted positions 21S-22S and 23S so as not 2 to hinder the making of the first bend in the leading end of the 3 section 15.
4 Next, the drawing and/or straightening assembly 14 feeds the section 15 forward by the required ler:~gth.
6 The bending unit 12, after having taken up its second 7 retracted position 12S (not shown) so as to enable the abutment 8 roll 17 to be transferred sideways, takes up its first normal 9 working position 12N to make the second bend in the leading end of the section 15.
11 Figs.9 show the section 15, which has undergone the second 12 bend in its leading end, an anticlockwise bend in this case.
13 During this step the downstream drawing unit :13 is in its 14 second retracted position 135; the gripping and guide element 21, the supporting switch 22 and the supporting channel 23 are also 16 in their respective retracted positions 21S-22S--23S so as not to 17 hinder the making of the second bend. in the leading end of the 18 section 15.
19 After the making of these two bends, each one of which may consist of one or more bends, in its leading end the section 15 21 is fed forwards by a desired length by the drawing and/or 22 straightening assembly 14, while the downstream drawing unit 13 23 and the gripping and guide element 21 are in their retracted 24 positions 13S-21S and the supporting switch 22 is in its normal working position 22N so as to support the section 15.
26 The section 15, when it has been fed forwards by the desired 27 length, cooperates with the downstream drawing unit 13, which has 28 taken up its :First normal working position 13N (Figs.l0).
29 The supporting channel 23, after it has been surpassed by the bent leading portion of the section 15, can take up its 31 normal working position 23N so as to support the section 15.
- 1~ - 2080881 1 The gripping and guide element 21 now takes up its second 2 normal working position 21N and grips the section 15 3 (Figs.ll); the section 15 is then sheared to size.
4 The section 15 is then fed forwards by the downstream drawing unit 13 by a required length suitable to prevent 6 contact with the shearing unit 11 during the next step 7 (Figs.l2), 8 The gripping and guide element 21 now takes up its third 9 raised position 21A (Fig.l2b) and compels the section 15 to be raised above the upstream protective cover 20 to a 11 position beyond the shearing unit 11.
12 Thereafter the downstream drawing unit 13 is actuated and 13 displaces the section 15 upstream by a desired length, while 14 the gripping and guide element 21 is in its raised but not clamping position 21A so as to enable the section 15 to 16 slide; next, the bending unit 12 is displaced to its raised 17 position 12A, while the gripping and guide element 21 takes 18 up its normal working position 21N and clamps the section 19 15, thus ensuring that the section 15 is positioned on the bending unit 12 and also maintaining a position of contact 21 with the working surface 16 (Figs.l3).
22 The bending unit 12 is then actuated and makes a bend, a 23 clockwise bend in this case, in the trailing end of the 29 section 15 Without the section 15 coming into contact with the shearing unit 11 or with the drawing and/or 26 straightening assembly 14.
27 The bending unit 12 takes up again its first normal 28 working position and the gripping and guideelement 12N, 21 29 takes up its raised to assist position 21A so as disengagement of section 15 from the abutment the roll 17 31 and bending pin and then takes up again a position 32 suitable for a further the section upstream displacement of 33 15 by the downstreamdrawing unit 13 (Figs.l4).
~ososs~
1 The downstream drawing unit 13 and the gripping and guide 2 element 21, after all the bends in the trailing end of the 3 section 15 have been made, take up their relative retracted 9 positions 13S and 215.
According to a variant which is not shown the supporting 6 switch 22 can take up a third raised position 22A so as to 7 support the section 15 also in steps in which the gripping 8 and guide element 21 is in its raised position 21A and the 9 downstream drawing unit 13 is displacing the section 15.
Claims (4)
1 - Bending-shaping machine having a working surface for bending sections passing therethrough from an upstream end to a downstream end, comprising:
an assembly that draws and straightens the sections;
an intermittently operated bending unit, provided downstream of said assembly, for bending the sections;
a shearing unit provided between said assembly and said bending unit, for shearing the sections;
a downstream drawing unit, provided downstream of said bending unit, for drawing the sections, said downstream unit having a first normal working position level with said working surface and a second retracted position below said working surface, said first normal working position permitting drawing of the sections by said drawing unit away from said bending unit and said second retracted position allowing for movement of the sections over said downstream drawing unit without interference therebetween;
wherein said bending unit is movable between a first normal working position level with said working surface, a second retracted position below said working surface and a third raised working position above said working surface for raising the sections above a level of said assembly and said shearing unit facilitating bending of the sections without intereference with said assembly and said shearing unit, said second retracted position permitting movement of the sections over said bending unit without contact thereto.
an assembly that draws and straightens the sections;
an intermittently operated bending unit, provided downstream of said assembly, for bending the sections;
a shearing unit provided between said assembly and said bending unit, for shearing the sections;
a downstream drawing unit, provided downstream of said bending unit, for drawing the sections, said downstream unit having a first normal working position level with said working surface and a second retracted position below said working surface, said first normal working position permitting drawing of the sections by said drawing unit away from said bending unit and said second retracted position allowing for movement of the sections over said downstream drawing unit without interference therebetween;
wherein said bending unit is movable between a first normal working position level with said working surface, a second retracted position below said working surface and a third raised working position above said working surface for raising the sections above a level of said assembly and said shearing unit facilitating bending of the sections without intereference with said assembly and said shearing unit, said second retracted position permitting movement of the sections over said bending unit without contact thereto.
2 - The bending-shaping machine as claimed in Claim 1, in which the downstream drawing unit (13) has a third raised working position (13A) coordinated with the third raised working position (12A) of the bending unit (12).
3 - The bending-shaping machine as claimed in any one of Claims 1 and 2, which comprises between the bending unit (12) and the downstream drawing unit (13) at least one gripping and guide element (21), which has a second normal working position (21N), a first downwardly retracted position (21S) and a third raised position (21A).
4 - The bending-shaping machine as claimed in Claim 3, in which the gripping and guide element (21) at least in either its second normal working position (21N) or its third raised position (21A) has a first position of clamping the section (15) and a second position of semiclamping the section (15) so as to permit axial sliding of the section (15).
- The bending-shaping machine as claimed in any one of Claims 1 to 4, which comprises upstream of the downstream drawing unit (13) supporting and guide means(22) having a first normal working position (22N), and a second downwardly retracted position (22S).
6 - The bending-shaping machine according to any one of Claims 1 to 4, which comprises upstream of the downstream drawing unit (13) supporting and guide means(22) having a first normal working position (22N), and a second downwardly retracted position (22S) and a third raised position (22A).
7 - The bending-shaping machine as claimed in any one of Claims 1 to 6, which comprises downstream of the downstream drawing unit (13) supporting means (23) having a first normal working position (23N), a second downwardly retracted position (23S), and a third raised position (23A).
- The bending-shaping machine as claimed in any one of Claims 1 to 4, which comprises upstream of the downstream drawing unit (13) supporting and guide means(22) having a first normal working position (22N), and a second downwardly retracted position (22S).
6 - The bending-shaping machine according to any one of Claims 1 to 4, which comprises upstream of the downstream drawing unit (13) supporting and guide means(22) having a first normal working position (22N), and a second downwardly retracted position (22S) and a third raised position (22A).
7 - The bending-shaping machine as claimed in any one of Claims 1 to 6, which comprises downstream of the downstream drawing unit (13) supporting means (23) having a first normal working position (23N), a second downwardly retracted position (23S), and a third raised position (23A).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITUD910174A IT1252984B (en) | 1991-10-21 | 1991-10-21 | MULTIPLE OPERATING LEVEL BENDING MACHINE |
| ITUD91A000174 | 1991-10-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2080881A1 CA2080881A1 (en) | 1993-04-22 |
| CA2080881C true CA2080881C (en) | 2004-12-28 |
Family
ID=11420931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002080881A Expired - Lifetime CA2080881C (en) | 1991-10-21 | 1992-10-19 | Bending-shaping machine having multiple working levels |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5285671A (en) |
| EP (1) | EP0538595B1 (en) |
| JP (1) | JP3263149B2 (en) |
| AT (1) | ATE122940T1 (en) |
| CA (1) | CA2080881C (en) |
| DE (1) | DE69202679T2 (en) |
| DK (1) | DK0538595T3 (en) |
| ES (1) | ES2072674T3 (en) |
| IT (1) | IT1252984B (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5355708A (en) * | 1993-12-20 | 1994-10-18 | Kauffman Kenneth A | Straight rod stock processor |
| US5632175A (en) * | 1995-10-27 | 1997-05-27 | Green; Paul O. | Rebar fabricating apparatus |
| IT1292692B1 (en) | 1997-03-20 | 1999-02-11 | Schnell Spa | PROCEDURE AND MACHINE FOR AUTOMATIC BENDING OF PROFILES AND SIMILAR. |
| IT1295107B1 (en) * | 1997-04-29 | 1999-04-30 | Piegatrici Macch Elettr | BENDING SYSTEM PERFECTED FOR BENDING MACHINES |
| IT1299921B1 (en) * | 1998-03-20 | 2000-04-04 | Schnell Spa | PROCEDURE FOR THE AUTOMATIC BENDING OF METAL AND SIMILAR PROFILES AND MACHINE TO IMPLEMENT THIS PROCEDURE. |
| ITBO20010209A1 (en) * | 2001-04-06 | 2002-10-06 | Me Sa Di Terenzi Gianfranco | METHOD FOR BENDING METAL PROFILES IN BARS AND MACHINE TO IMPLEMENT THIS METHOD |
| ITBO20010208A1 (en) * | 2001-04-06 | 2002-10-06 | Me Sa Di Terenzi Gianfranco | METHOD FOR BENDING METAL PROFILES IN BARS AND MACHINES TO IMPLEMENT THIS METHOD |
| ITUD20010126A1 (en) | 2001-07-19 | 2003-01-19 | Piegatrici Macch Elettr | BENDING MACHINE FOR PROFILES AND RELATED BENDING PROCEDURE |
| ITUD20010197A1 (en) * | 2001-11-30 | 2003-05-30 | Piegatrici Macch Elettr | BENDING MACHINE FOR PROFILES, SUCH AS ROUND ARMOR OR SIMILAR |
| ITUD20020013A1 (en) * | 2002-01-24 | 2003-07-24 | Piegatrici Macch Elettr | EJECTOR DEVICE FOR BARS OR BARS |
| ITUD20020226A1 (en) * | 2002-10-28 | 2004-04-29 | Piegatrici Macch Elettr | BENDING MACHINE FOR BARS AND RELATED BENDING PROCEDURE |
| ITUD20040032A1 (en) * | 2004-02-25 | 2004-05-25 | Omes Ohg Srl | BAR FOLDING DEVICE |
| ITUD20060073A1 (en) | 2006-03-22 | 2007-09-23 | Awm Spa | "AUTOMATIC GROUP OF BENDING AND INSERTING OF REINFORCEMENT BARS IN THE METAL REINFORCED CAGES ALREADY PREFORMED" |
| JP5967449B2 (en) * | 2010-07-28 | 2016-08-10 | シュネル エス．ピー．エー． | Method for manufacturing reinforced steel bars for reinforced concrete, and apparatus for bending the steel bars |
| ITUD20110061A1 (en) * | 2011-04-18 | 2012-10-19 | Piegatrici Macch Elettr | BENDING MACHINE FOR METALLIC BARS, AS ROUNDS FOR ARMOR OR SIMILAR |
| CN102862054B (en) * | 2012-09-27 | 2015-05-13 | 浙江大学 | Full-automatic slotting bending machine |
| CN103447822B (en) * | 2013-08-26 | 2015-09-02 | 上虞通风机有限公司 | A kind of air inlet frame forming machine of tank type ventilator |
| CN105127338A (en) * | 2015-07-29 | 2015-12-09 | 张省平 | Anchor bolt production line |
| CN105195651B (en) * | 2015-10-29 | 2017-08-08 | 安溪县大富山家庭农场 | The novel forming method of foundation bolt |
| CN107774820A (en) * | 2017-09-27 | 2018-03-09 | 宝鸡市永盛泰钛业有限公司 | A kind of automatic feed mechanism of titanium or titanium alloy plate plate shearing machine |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3777531A (en) * | 1972-05-25 | 1973-12-11 | Engel Ind Inc | Double-spindled elevating multi-station roll former machine and power drive therefor |
| IT1024224B (en) * | 1974-11-15 | 1978-06-20 | Del Fabbro Remigio | MAOCHINA CONTINUOUS SUPPLY SUPPLY BRACKET WITH MATERIAL RECOVERY AND RELEVANT ME TODO OF OBERARE FOR THE QUSTRUTION OF THE SAID BRACKETS |
| IT1125327B (en) * | 1979-02-28 | 1986-05-14 | Piegatrici Macch Elettr | STAPLING MACHINE |
| DE3316917A1 (en) * | 1983-05-09 | 1984-11-22 | Werner 8904 Friedberg Lutzke | Apparatus for meander-shaped bending of material in rod form |
| US4660399A (en) * | 1985-06-03 | 1987-04-28 | Suter Frank L | Mobile roll-forming machine |
| IT1235177B (en) * | 1989-01-18 | 1992-06-23 | Piegatrici Macch Elettr | DOWNSTREAM DRIVER GROUP FOLDER GROUP AND TAIL BENDING PROCEDURE. |
| IT1235176B (en) * | 1989-01-18 | 1992-06-23 | Piegatrici Macch Elettr | UPRIGHT MOBILE SHEAR, FOLDING GROUP AND TAIL BENDING PROCEDURE. |
| IT1236462B (en) * | 1989-12-29 | 1993-03-09 | Fabro Giorgio Del | SATELLITE BENDING GROUP |
| IT1242690B (en) * | 1990-12-17 | 1994-05-17 | Piegatrici Macch Elettr | SHAPING BENDING MACHINE FOR PROFILES AND PROFILE BENDING PROCESS. |
-
1991
- 1991-10-21 IT ITUD910174A patent/IT1252984B/en active IP Right Grant
-
1992
- 1992-09-01 DE DE69202679T patent/DE69202679T2/en not_active Expired - Lifetime
- 1992-09-01 EP EP92114885A patent/EP0538595B1/en not_active Expired - Lifetime
- 1992-09-01 AT AT92114885T patent/ATE122940T1/en active
- 1992-09-01 DK DK92114885.4T patent/DK0538595T3/en active
- 1992-09-01 ES ES92114885T patent/ES2072674T3/en not_active Expired - Lifetime
- 1992-09-17 US US07/945,888 patent/US5285671A/en not_active Expired - Lifetime
- 1992-10-19 CA CA002080881A patent/CA2080881C/en not_active Expired - Lifetime
- 1992-10-21 JP JP28311492A patent/JP3263149B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP3263149B2 (en) | 2002-03-04 |
| EP0538595B1 (en) | 1995-05-24 |
| IT1252984B (en) | 1995-07-10 |
| ITUD910174A1 (en) | 1993-04-21 |
| DK0538595T3 (en) | 1995-07-24 |
| ES2072674T3 (en) | 1995-07-16 |
| DE69202679D1 (en) | 1995-06-29 |
| ATE122940T1 (en) | 1995-06-15 |
| US5285671A (en) | 1994-02-15 |
| DE69202679T2 (en) | 1996-01-25 |
| JPH05208220A (en) | 1993-08-20 |
| EP0538595A1 (en) | 1993-04-28 |
| ITUD910174A0 (en) | 1991-10-21 |
| CA2080881A1 (en) | 1993-04-22 |
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| Date | Code | Title | Description |
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| EEER | Examination request | ||
| MKEX | Expiry | ||
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Effective date: 20121019 |