EP0882529A1 - Bending method with mobile bending assembly and relative shaping machine - Google Patents
Bending method with mobile bending assembly and relative shaping machine Download PDFInfo
- Publication number
- EP0882529A1 EP0882529A1 EP98109427A EP98109427A EP0882529A1 EP 0882529 A1 EP0882529 A1 EP 0882529A1 EP 98109427 A EP98109427 A EP 98109427A EP 98109427 A EP98109427 A EP 98109427A EP 0882529 A1 EP0882529 A1 EP 0882529A1
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- EP
- European Patent Office
- Prior art keywords
- bending
- assembly
- round piece
- round
- shaping machine
- 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.)
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F1/00—Bending wire other than coiling; Straightening wire
Definitions
- This invention concerns a bending method with a mobile bending assembly and the relative shaping machine as set forth in the respective main claims.
- the invention is employed preferentially, but not exclusively, to shape round pieces used for reinforcement purposes in the building trade, but it may be employed equally well to bend pipes, full-section or hollow bars or other shapes in general.
- round piece' shall include all other sections which can be used to make bars and/or brackets for reinforcement purposes.
- 'Round piece' shall also be taken to include bundles of superimposed round pieces shaped at the same time.
- the state of the art includes bending/shaping machines used to make rods and/or brackets for reinforcement purposes in the building trade. These machines are equipped with bending assemblies consisting substantially of a rotary disk including a central contrasting pin and a peripheral contrasting pin.
- the round piece which is to be bent is inserted between the two pins and is shaped by rotating the disk with the desired angle and in the desired direction according to the geometry of the shape to be obtained.
- Bending/shaping machines known to the state of the art may have the work plane inclined to the horizontal, which improves the functioning of the machine and the operational characteristics, particularly during the discharge of the finished products.
- Bending/shaping machines which have two bending stations are often preferred to those which have only one bending station due to their greater speed; on the other hand, however, machines with two bending stations are much more costly.
- the shaping of the round piece is achieved by making the round piece advance and/or retreat with respect to the stationary bender(s), according to the planned design of the shaped product; as the round piece is gradually moved, it is sequentially shaped by the bending assembly along a segment of a desired length.
- DE-A-39 19 607 describes a bending method which uses a bending trolley movable along the bar which is to be bent; the bars are bent by displacing the bending trolley with respect to the attachment device which is preset to clamp the bars during bending.
- EP-A-715 907 describes a device including a bending station attached to the machine and a bending station which is movable lengthwise to the machine; each of the two bending stations includes its own bending organ and its own clamping organ.
- a first end of the bar is inserted into the stationary bending station and the second end of the bar is inserted into the movable bending station.
- the movable bending station is first used to position the first end of the bar lengthwise so that it can be bent by the stationary bending station, then it is used to bend the second end of the bar and then to move the bar lengthwise with respect to the stationary bending station in order to make the bends in the correct positions.
- This device needs two different bending stations with the relative drive and movement organs.
- DE 94 06 880 also describes a bending machine with two bending stations which are movable lengthwise; it includes a clamping device, which is also movable lengthwise, at an intermediate position between the two stations.
- the position of the clamping device with respect to the bending stations is regulated by a command device during the bending cycle.
- the present applicant has designed and embodied this invention in order to achieve a versatile bending method for simple and functional bending machines with a bending assembly and to obtain further advantages.
- the purpose of the invention is to obtain a method to bend round pieces for reinforcement purposes, pipes, full-section or hollow bars or other shapes in general, which will be reliable, versatile and functional regardless of the diameter of the round piece to be shaped and/or the type of bend to be performed.
- a further purpose of the invention is to provide a shaping machine characterised by high productivity and reliability.
- the shaping machine according to the invention includes a bending assembly upstream of which there is at least an assembly to feed the round piece and an assembly to shear to size.
- the bending assembly can be moved lengthwise with respect to the round piece to be shaped.
- the bending assembly can have at least a first position, wherein bending is started, at least a second position, wherein bending is finished, and a plurality of intermediate positions between the said first and second positions coherent with the position of the bends to be made.
- the bending assembly may be of any type whatsoever, for example including a rotary bending disk supporting at least a bending pin and one or more contrasting pins.
- the bending assembly cooperates with retaining means which temporally clamp and guide the round piece which is to be shaped, when the bending assembly moves lengthwise with respect to the round piece to position itself according to the bends which are to be made.
- the retaining means comprise two retaining assemblies of which at least one is solid with the bending assembly.
- the bending assembly moves within a sliding seating and its journey is determined by the length thereof.
- the sliding seating cooperates with closing means whose function is to at least partially close the sliding seating when the bending assembly is in the start-of-bending position in close proximity with the feeding assembly and the shearing assembly.
- the round piece to be shaped is fed to the bending assembly which performs sequentially the desired shaping of the leading end.
- the round piece is made to advance for a desired segment then sheared to size by the shearing assembly and kept stationary in this advanced position by the retaining means.
- the relative closing means are taken to the closed position, defining a work plane which facilitates the advance of the round piece and prevents it stopping accidentally or jamming in the sliding seating.
- the closing means of the sliding seating are taken to a position of non-contact so as to allow the lengthwise movement of the bending assembly in the sliding seating with respect to the round piece, which is held stationary.
- the bending assembly gradually advances, it stops in the pre-determined positions in order to perform the desired shaping on the round piece sequentially, starting from the trailing end and moving towards the leading end of the round piece which has already been shaped.
- a retaining assembly solid with the bending assembly clamps the round piece every time the bending assembly makes a bend.
- the shaped round piece is discharged by the machine, the bending assembly is returned to its start-of-bending position and the closing means returned to the closed position of the sliding seating; it is thus possible to begin a new bending cycle.
- the bending assembly or part thereof, can be moved at a right angle to the plane of the machine so that it can be temporarily positioned in such a way that both left-hand and right-hand bends can be accomplished.
- the shaping machine 10 according to the invention for round pieces 16 for reinforcement purposes shown in Fig. 1 is of the type which has an inclined work plane 11 cooperating with a bending assembly 12.
- the bending assembly 12 consists of a rotary disk 13 on the periphery of which a bending pin 18 is solidly associated.
- a central contrasting pin 19 cooperates with the rotary disk 13 and the bending pin 18.
- a drawing assembly 14 Upstream of the bending assembly 12 there is a drawing assembly 14, in this case of the pinch roll type, which also has the function of partially straightening the round piece 16 fed, for example, from a reel.
- a shearing assembly 15 in this case, a shears.
- the first retaining assembly 17a is solid with the bending assembly 12 and moves therewith, whereas the second retaining assembly 17b is solid with the work plane 11 and therefore stationary with respect to the bending assembly 12.
- Both the retaining assemblies 17a, 17b may be temporally excluded with respect to the work plane 11, for example withdrawing vertically to allow the round piece 16 to advance even when its leading ends are shaped.
- the bending assembly 12 can be moved lengthwise to the round piece 16 which is to be shaped.
- the bending assembly 12 can also be moved transversely with respect to the round piece 16 which is to be shaped; this allows the bending assembly 12 to be pre-arranged to perform both left-hand and right-hand bends.
- the bending assembly 12 is associated with a trolley 23 suitable to slide along mating guides 24.
- the sliding seating 20 cooperates with a cover element 21 which is arranged in a closed position when the bending assembly 12 is in the start-of-bending position 12a.
- the bending assembly 12 is at the beginning of the sliding seating 20 near the shearing assembly 15 and the drawing assembly 14.
- the cover element 21 can assume a closed position 21a which defines a sliding plane on which the round piece 16 can advance without any danger of stopping or jamming against the sliding seating 20.
- the cover element 21 on the contrary assumes a position of non-contact 21b, shown as a line of dashes, so as to free the sliding seating 20 and allow the bending assembly 12 to be displaced therein.
- the cover element 21 travels from the closed position 21a to the position of non-contact 21b and vice versa oscillating around a pin element 25.
- the cover element 21 is made on a trolley 123 which can be moved perpendicularly to the direction of feed of the round piece 16 and is suitable to travel to a position of non-contact (shown by a line of dashes in Fig. 5) as the trolley 23 advances, the position being contained inside the machine 10.
- the guide element 22 can be retracted below the work plane 11; according to another variant, the guide element 22 can be moved at least transversely with respect to the work plane 11.
- the cover element 21 and the guide element 22 cooperate at the upper part with a movable limiting element, for example shaped like a plate, which makes it possible to keep the bends of the round piece 16 resting on the cover element 21, or more generally on the work plane 11, thus preventing the round piece 16 from twisting as it advances towards the second retaining assembly 17b.
- a movable limiting element for example shaped like a plate
- Figs. 3a-3f show in diagram form some steps in the bending cycle according to the invention.
- the shaping machine 10 has the bending assembly 12 in the start-of-bending position 12a and the segment of the sliding seating 20 located downstream of the bending assembly 12 is closed by the cover element 21 arranged in the closed position 21a.
- the round piece 16 is made to advance so that the bending assembly 12 can perform the desired shaping of the leading end sequentially.
- the bending assembly 12 While the leading end is being shaped, the bending assembly 12 is held stationary in the start-of-bending position 12a.
- the round piece 16 is first fed forwards by a desired segment, then stopped and held in position both by the first 17a and also by the second 17b retaining assembly and then sheared to size by the shearing assembly 15 (Fig. 3c).
- the second retaining assembly 17b is stationary; according to a variant it can be moved at least lengthwise with respect to the work plane 11 depending on the length of the segment of the round piece 16 which is to be shaped.
- the retaining assembly 17b consists of a gripper which is anchored stationary to the work plane 11 and which acts on the round piece 16 from above.
- both the first 17a and the second 17b retaining assemblies are of the type which can be retracted and temporally excluded; this makes it possible to take them to a position of non-contact with the bends of the leading ends of the round piece 16 as the latter advances on the work plane 11.
- the bending assembly 12 moves inside the sliding seating 20, and gradually stops in the necessary positions so as to progressively carry out the intermediate bends on the round piece 16.
- the first bend is made with the bending assembly 12 in the start-of-bending position 12a (Fig. 3d)
- the second bend is made with the bending assembly 12 in the intermediate position 12b arranged in the first half of the sliding seating 20 (Fig. 3e)
- the last bend is made with the bending assembly 12 in the end-of-bending position 12c arranged in the second half of the sliding seating 20 (Fig. 3f).
- the first retaining assembly 17a during bending, is made to close on the round piece 16 so as to function as a contrast to the bending and, when the bending assembly 12 is moved, the first retaining assembly 17a is opened.
- the retaining assemblies 17a, 17b are opened and the shaped round piece 16 is discharged from the shaping machine 10.
- the bending assembly 12 is then taken back to the start-of-bending position 12a and the sliding seating 20 is closed by the cover element 21.
- the shaping machine 10 therefore again assumes its initial configuration as shown in Fig. 3a, ready to begin a new cycle of bending.
Abstract
Bending method for machines to shape metallic shapes,
particularly but not exclusively round pieces (16) used for
reinforcement purposes in the building trade, the machine
including a work plane (11) on which there is a bending
assembly (12), a drawing and possibly straightening assembly
(14) arranged upstream of the bending assembly (12) and a
shearing assembly (15) arranged between the drawing assembly
(14) and the bending assembly (12), there also being
included at least an assembly (17b) to retain the round
piece (16) which can be temporally excluded, the system
providing that, when bending is started, the round piece
(16) is positioned by the drawing assembly (14) in
cooperation with the bending assembly (12) in order to bend
the leading end, then the round piece (16) is made to
advance by a desired segment and then sheared to size by the
shearing assembly (15) so that the trailing end of the round
piece (16) is positioned in cooperation with the bending
assembly (12), the round piece (16) then being held in
position by the at least one retaining assembly (17b), the
bending assembly (12) then being displaced progressively
from the trailing end of the round piece (16) towards the
leading end and stopped in correspondence with the position
of the intermediate bends to be made on the round piece
(16).
Shaping machine which achieves the method as described
above.
Description
This invention concerns a bending method with a mobile
bending assembly and the relative shaping machine as set
forth in the respective main claims.
The invention is employed preferentially, but not
exclusively, to shape round pieces used for reinforcement
purposes in the building trade, but it may be employed
equally well to bend pipes, full-section or hollow bars or
other shapes in general.
For reasons of practicality, we shall refer hereinafter to
a specific use of the invention for round pieces used for
reinforcement purposes, and therefore the term 'round piece'
shall include all other sections which can be used to make
bars and/or brackets for reinforcement purposes.
'Round piece' shall also be taken to include bundles of
superimposed round pieces shaped at the same time.
The state of the art includes bending/shaping machines
used to make rods and/or brackets for reinforcement purposes
in the building trade. These machines are equipped with
bending assemblies consisting substantially of a rotary disk
including a central contrasting pin and a peripheral
contrasting pin.
The round piece which is to be bent is inserted between
the two pins and is shaped by rotating the disk with the
desired angle and in the desired direction according to the
geometry of the shape to be obtained.
There are also bending assemblies known to the state of
the art which, as an alternative to the contrasting pin,
have other contrasting elements, for example of the winged
type, comprising a lengthwise containing hollow through
which the round piece to be bent passes.
Upstream of the bending/shaping machines known to the
state of the art, whether they have one or more bending
stations, there are usually assemblies to feed the round
piece, possibly straightening assemblies and assemblies to
shear to size.
Downstream of the bending/shaping machines, there may be
assemblies to discharge and collect the shaped round piece.
Bending/shaping machines known to the state of the art may
have the work plane inclined to the horizontal, which
improves the functioning of the machine and the operational
characteristics, particularly during the discharge of the
finished products.
Bending/shaping machines which have two bending stations
are often preferred to those which have only one bending
station due to their greater speed; on the other hand,
however, machines with two bending stations are much more
costly.
In bending/shaping machines known to the state of the art,
the shaping of the round piece is achieved by making the
round piece advance and/or retreat with respect to the
stationary bender(s), according to the planned design of the
shaped product; as the round piece is gradually moved, it is
sequentially shaped by the bending assembly along a segment
of a desired length.
On the other hand, there are also bending machines wherein
it is the bending assemblies which are displaced lengthwise
to the round piece so as to achieve the bends at the desired
points.
For example, DE-A-39 19 607 describes a bending method
which uses a bending trolley movable along the bar which is
to be bent; the bars are bent by displacing the bending
trolley with respect to the attachment device which is preset
to clamp the bars during bending.
EP-A-715 907 describes a device including a bending
station attached to the machine and a bending station which
is movable lengthwise to the machine; each of the two
bending stations includes its own bending organ and its own
clamping organ.
In this device, a first end of the bar is inserted into
the stationary bending station and the second end of the bar
is inserted into the movable bending station.
The movable bending station is first used to position the
first end of the bar lengthwise so that it can be bent by
the stationary bending station, then it is used to bend the
second end of the bar and then to move the bar lengthwise
with respect to the stationary bending station in order to
make the bends in the correct positions.
This device needs two different bending stations with the
relative drive and movement organs.
DE 94 06 880 also describes a bending machine with two
bending stations which are movable lengthwise; it includes a
clamping device, which is also movable lengthwise, at an
intermediate position between the two stations. The position
of the clamping device with respect to the bending stations
is regulated by a command device during the bending cycle.
The present applicant has designed and embodied this
invention in order to achieve a versatile bending method for
simple and functional bending machines with a bending
assembly and to obtain further advantages.
The invention is set forth and characterised in the
respective main claims while the dependent claims describe
variants of the idea of the main embodiment.
The purpose of the invention is to obtain a method to bend
round pieces for reinforcement purposes, pipes, full-section
or hollow bars or other shapes in general, which will be
reliable, versatile and functional regardless of the
diameter of the round piece to be shaped and/or the type of
bend to be performed.
A further purpose of the invention is to provide a shaping
machine characterised by high productivity and reliability.
The shaping machine according to the invention includes a
bending assembly upstream of which there is at least an
assembly to feed the round piece and an assembly to shear to
size.
According to the invention, the bending assembly can be
moved lengthwise with respect to the round piece to be
shaped.
According to one possible embodiment, the bending assembly
can have at least a first position, wherein bending is
started, at least a second position, wherein bending is
finished, and a plurality of intermediate positions between
the said first and second positions coherent with the
position of the bends to be made.
The bending assembly may be of any type whatsoever, for
example including a rotary bending disk supporting at least
a bending pin and one or more contrasting pins.
However, it is possible to use bending assemblies of other
types.
According to the invention, the bending assembly
cooperates with retaining means which temporally clamp and
guide the round piece which is to be shaped, when the
bending assembly moves lengthwise with respect to the round
piece to position itself according to the bends which are to
be made.
According to a variant, the retaining means comprise two
retaining assemblies of which at least one is solid with the
bending assembly.
According to one embodiment of the invention, the bending
assembly moves within a sliding seating and its journey is
determined by the length thereof.
According to a variant, the sliding seating cooperates
with closing means whose function is to at least partially
close the sliding seating when the bending assembly is in
the start-of-bending position in close proximity with the
feeding assembly and the shearing assembly.
According to the invention, when the bending assembly is
in the start-of-bending position, the round piece to be
shaped is fed to the bending assembly which performs
sequentially the desired shaping of the leading end.
Once the shaping of the leading end has been accomplished,
the round piece is made to advance for a desired segment
then sheared to size by the shearing assembly and kept
stationary in this advanced position by the retaining means.
According to the invention, if there is a sliding seating
for the bending assembly, during the step when the round
piece advances, the relative closing means are taken to the
closed position, defining a work plane which facilitates the
advance of the round piece and prevents it stopping
accidentally or jamming in the sliding seating.
When the round piece has finished advancing, the closing
means of the sliding seating are taken to a position of non-contact
so as to allow the lengthwise movement of the
bending assembly in the sliding seating with respect to the
round piece, which is held stationary.
As the bending assembly gradually advances, it stops in
the pre-determined positions in order to perform the desired
shaping on the round piece sequentially, starting from the
trailing end and moving towards the leading end of the round
piece which has already been shaped.
According to a variant, a retaining assembly solid with
the bending assembly clamps the round piece every time the
bending assembly makes a bend.
When the bending is concluded, the shaped round piece is
discharged by the machine, the bending assembly is returned
to its start-of-bending position and the closing means
returned to the closed position of the sliding seating; it
is thus possible to begin a new bending cycle.
According to a variant, the bending assembly, or part
thereof, can be moved at a right angle to the plane of the
machine so that it can be temporarily positioned in such a
way that both left-hand and right-hand bends can be
accomplished.
The attached Figures are given as a non-restrictive
example, and show some preferential embodiments of the
invention as follows:
- Fig. 1
- shows a three-dimensional view of a possible embodiment of a shaping machine using the bending method according to the invention;
- Fig. 2
- shows an enlarged cross-section from A to A of Fig. 1;
- Figs. 3a-3f
- show in diagram form a bending cycle of the machine shown in Fig. 1;
- Fig. 4
- shows a part view of a variant of Fig. 1;
- Fig. 5
- shows a side view of Fig. 4.
The shaping machine 10 according to the invention for
round pieces 16 for reinforcement purposes shown in Fig. 1
is of the type which has an inclined work plane 11
cooperating with a bending assembly 12.
In this case, the bending assembly 12 consists of a rotary
disk 13 on the periphery of which a bending pin 18 is
solidly associated.
A central contrasting pin 19 cooperates with the rotary
disk 13 and the bending pin 18.
It is however possible to use other types of bending
assemblies 12, for example of the type which includes
contrasting means of the winged type with a lengthwise
containing hollow through which the round piece 16 transits,
or of any other type.
Upstream of the bending assembly 12 there is a drawing
assembly 14, in this case of the pinch roll type, which also
has the function of partially straightening the round piece
16 fed, for example, from a reel.
Between the bending assembly 12 and the drawing assembly
14 there is a shearing assembly 15, in this case, a shears.
Downstream of the bending assembly 12, in the embodiment
shown here, there are two assemblies to retain the round
piece 16, respectively the first retaining assembly 17a and
the second retaining assembly 17b, in this case of the
gripper type.
In the embodiment shown here, the first retaining assembly
17a is solid with the bending assembly 12 and moves
therewith, whereas the second retaining assembly 17b is
solid with the work plane 11 and therefore stationary with
respect to the bending assembly 12.
Both the retaining assemblies 17a, 17b may be temporally
excluded with respect to the work plane 11, for example
withdrawing vertically to allow the round piece 16 to
advance even when its leading ends are shaped.
According to the invention, the bending assembly 12 can be
moved lengthwise to the round piece 16 which is to be
shaped.
According to a variant, which is not shown here, the
bending assembly 12 can also be moved transversely with
respect to the round piece 16 which is to be shaped; this
allows the bending assembly 12 to be pre-arranged to perform
both left-hand and right-hand bends.
In this case, the lengthwise movements of the bending
assembly 12 occur within the appropriate sliding seating 20.
In this case, the bending assembly 12 is associated with a
trolley 23 suitable to slide along mating guides 24.
According to the invention, the sliding seating 20
cooperates with a cover element 21 which is arranged in a
closed position when the bending assembly 12 is in the
start-of-bending position 12a.
In this start-of-bending position 12a, the bending
assembly 12 is at the beginning of the sliding seating 20
near the shearing assembly 15 and the drawing assembly 14.
To be more exact, as shown in Fig. 2, the cover element 21
can assume a closed position 21a which defines a sliding
plane on which the round piece 16 can advance without any
danger of stopping or jamming against the sliding seating
20.
The cover element 21 on the contrary assumes a position of
non-contact 21b, shown as a line of dashes, so as to free
the sliding seating 20 and allow the bending assembly 12 to
be displaced therein.
In the case of Fig. 2, the cover element 21 travels from
the closed position 21a to the position of non-contact 21b
and vice versa oscillating around a pin element 25.
According to a variant shown in Figs. 4 and 5, the cover
element 21 is made on a trolley 123 which can be moved
perpendicularly to the direction of feed of the round piece
16 and is suitable to travel to a position of non-contact
(shown by a line of dashes in Fig. 5) as the trolley 23
advances, the position being contained inside the machine
10.
On the lower part of the contact surface between the cover
element 21 and the round piece 16 there is a guide element
22 which prevents any downward deflection of the round piece
16.
According to a variant, the guide element 22 can be
retracted below the work plane 11; according to another
variant, the guide element 22 can be moved at least
transversely with respect to the work plane 11.
According to another variant which is not shown here, the
cover element 21 and the guide element 22 cooperate at the
upper part with a movable limiting element, for example
shaped like a plate, which makes it possible to keep the
bends of the round piece 16 resting on the cover element 21,
or more generally on the work plane 11, thus preventing the
round piece 16 from twisting as it advances towards the
second retaining assembly 17b.
Figs. 3a-3f show in diagram form some steps in the bending
cycle according to the invention.
At the beginning of the cycle (Figs. 1, 3a), the shaping
machine 10 has the bending assembly 12 in the start-of-bending
position 12a and the segment of the sliding seating
20 located downstream of the bending assembly 12 is closed
by the cover element 21 arranged in the closed position 21a.
Subsequently, as shown in Fig. 3b, the round piece 16 is
made to advance so that the bending assembly 12 can perform
the desired shaping of the leading end sequentially.
While the leading end is being shaped, the bending
assembly 12 is held stationary in the start-of-bending
position 12a.
When the leading end has been shaped, the round piece 16
is first fed forwards by a desired segment, then stopped and
held in position both by the first 17a and also by the
second 17b retaining assembly and then sheared to size by
the shearing assembly 15 (Fig. 3c).
In this case, the second retaining assembly 17b is
stationary; according to a variant it can be moved at least
lengthwise with respect to the work plane 11 depending on
the length of the segment of the round piece 16 which is to
be shaped.
According to another variant which is not shown here, the
retaining assembly 17b consists of a gripper which is
anchored stationary to the work plane 11 and which acts on
the round piece 16 from above.
In this case, moreover, both the first 17a and the second
17b retaining assemblies are of the type which can be
retracted and temporally excluded; this makes it possible to
take them to a position of non-contact with the bends of the
leading ends of the round piece 16 as the latter advances on
the work plane 11.
After the round piece 16 has been sheared to size, the
bending assembly 12 moves inside the sliding seating 20, and
gradually stops in the necessary positions so as to
progressively carry out the intermediate bends on the round
piece 16.
As shown in Fig. 3d, during this step the sliding seating
20 is released, and carries the cover element 21 to a
position of non-contact 21b.
In this case, three successive bends are made on the round
piece 16; the first bend is made with the bending assembly
12 in the start-of-bending position 12a (Fig. 3d), the
second bend is made with the bending assembly 12 in the
intermediate position 12b arranged in the first half of the
sliding seating 20 (Fig. 3e) and the last bend is made with
the bending assembly 12 in the end-of-bending position 12c
arranged in the second half of the sliding seating 20 (Fig.
3f).
It is therefore obvious that there may be a plurality of
intermediate positions 12b depending on the geometry of the
finished product to be obtained, and that the end-of-bending
position 12c may coincide or not with the end of the sliding
seating 20.
According to the invention, the first retaining assembly
17a, during bending, is made to close on the round piece 16
so as to function as a contrast to the bending and, when the
bending assembly 12 is moved, the first retaining assembly
17a is opened.
When the bending process is concluded, the retaining
assemblies 17a, 17b are opened and the shaped round piece 16
is discharged from the shaping machine 10.
The bending assembly 12 is then taken back to the start-of-bending
position 12a and the sliding seating 20 is closed
by the cover element 21.
The shaping machine 10 therefore again assumes its initial
configuration as shown in Fig. 3a, ready to begin a new
cycle of bending.
Claims (13)
- Bending method for machines to shape metallic shapes, particularly but not exclusively round pieces (16) used for reinforcement purposes in the building trade, the machine including a work plane (11) on which there is a bending assembly (12), a drawing and possibly straightening assembly (14) arranged upstream of the bending assembly (12) and a shearing assembly (15) arranged between the drawing assembly (14) and the bending assembly (12), there also being included at least an assembly to retain the round piece (16) which can be temporally excluded, the system being characterised in that, when bending is started, the round piece (16) is positioned by the drawing assembly (14) in cooperation with the bending assembly (12) in order to bend the leading end, then the round piece (16) is made to advance by a desired segment and then sheared to size by the shearing assembly (15) so that the trailing end of the round piece (16) is positioned in cooperation with the bending assembly (12), the round piece (16) then being held in position by the at least one retaining assembly (17b), the bending assembly (12) then being displaced progressively from the trailing end of the round piece (16) towards the leading end and stopped in correspondence with the position of the intermediate bends to be made on the round piece (16).
- Method as in Claim 1, in which the bending assembly (12) assumes at least a lengthwise position at the start of bending (12a) cooperating with the leading end of the round piece (16), at least an end-of-bending position (12c) cooperating substantially with the trailing end of the round piece (16) and a plurality of intermediate positions (12b) lengthwise to the round piece (16) depending on the number and position of the intermediate bends to be made.
- Method as in Claim 2, in which, after the finished shaped product has been discharged from the machine (10), from the end-of-bending position (12c) the bending assembly is returned to the start-of-bending position (12a).
- Method as in any claim hereinbefore, in which the bending assembly (12), in its lengthwise movements, is made to cooperate with a sliding seating (20) made below the work plane (11) and cooperating with temporal cover means (21).
- Shaping machine to bend metallic shapes, particularly but not exclusively round pieces (16) used for reinforcement purposes in the building trade, the machine including a work plane (11) on which there is a bending assembly (12), a drawing and possibly straightening assembly (14) arranged upstream of the bending assembly (12) and a shearing assembly (15) arranged between the drawing assembly (14) and the bending assembly (12), there also being included at least an assembly (17b) to retain the round piece (16) which can be temporally excluded, the machine being characterised in that the bending assembly (12) is movable lengthwise with respect to the round piece (16) so as to assume at least a position (12a) wherein bending is started, at least a position (12c) wherein bending is finished, and a plurality of intermediate positions (12b) between the said start-of-bending (12a) and end-of-bending (12c) positions, the intermediate positions (12b) being coherent with the number and position of the bends to be made on the round piece (16) according to the planned design of the shaped product to be obtained.
- Shaping machine as in Claim 5, in which the bending assembly (12) is associated with a trolley (23) able to slide inside a sliding seating (20) located below the work plane (11).
- Shaping machine as in Claim 6, in which the sliding seating (20) cooperates with a cover element (21).
- Shaping machine as in Claim 7, in which the cover element (21) includes a first closed position (21a) wherein it closes the sliding seating (20) while the round piece (16) is being fed, and a second position (21b) wherein it frees the sliding seating (20) while the round piece (16) is displaced lengthwise.
- Shaping machine as in Claim 8, in which the cover element (21) oscillates with respect to the work plane (11).
- Shaping machine as in Claim 8, in which the cover element (21) can be translated backwards with respect to the work plane (11).
- Shaping machine as in any claim from 5 to 10 inclusive, which includes at least a retaining assembly (17b) solid with the work plane (11) and acting on the round piece (16) at least during the lengthwise displacement of the bending assembly (12).
- Shaping machine as in any claim from 5 to 11 inclusive, which includes at least a retaining assembly (17a) associated with the bending assembly (12) and acting on the round piece (16) while the round piece (16) is being bent.
- Shaping machine as in Claims 11 and 12, in which the retaining assemblies (17a, 17b) can be temporally excluded with respect to the work plane (11).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITUS970100 | 1997-05-29 | ||
ITUD970100A ITUD970100A0 (en) | 1997-05-29 | 1997-05-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0882529A1 true EP0882529A1 (en) | 1998-12-09 |
Family
ID=11422401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98109427A Withdrawn EP0882529A1 (en) | 1997-05-29 | 1998-05-25 | Bending method with mobile bending assembly and relative shaping machine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0882529A1 (en) |
IT (2) | ITUD970100A0 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003024640A1 (en) * | 2001-09-14 | 2003-03-27 | M.E.P. Macchine Elettroniche Piegatrici Spa | Bending machine for profiles, such as reinforcement round pieces or similar |
WO2003045603A1 (en) * | 2001-11-30 | 2003-06-05 | M.E.P. Macchine Elettroniche Piegatrici Spa | Bending machine for profiles such as reinforcement round pieces or similar |
EP1952905A1 (en) * | 2007-02-05 | 2008-08-06 | Galanos S.A. | Machine for cutting and bending of iron rods by use of mobile heads and displaceable per section holding guides of straight rod. |
WO2012013729A1 (en) * | 2010-07-28 | 2012-02-02 | Schnell S.P.A. | Method for making reinforcement irons |
JP2017516663A (en) * | 2014-06-06 | 2017-06-22 | エム・イー・ピー・マシーネ・エレトロニーチェ・ピエガトリーチ・エス・ピー・エイM.E.P. Macchine Elettroniche Piegatrici Societa Per Azioni | Completed bending machine and corresponding method |
CN108188307A (en) * | 2017-12-11 | 2018-06-22 | 江门市新会区国正机电设备有限公司 | Full-automatic bending butt welding machine and its processing method |
CN109926518A (en) * | 2019-04-01 | 2019-06-25 | 湖南广播电视大学 | A kind of automatic charging bending machine |
Citations (5)
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JPS58209424A (en) * | 1982-05-31 | 1983-12-06 | Mitsui Eng & Shipbuild Co Ltd | Automatic bending apparatus for steel bar |
DE3919607A1 (en) * | 1989-06-15 | 1991-01-03 | Heinz Ruhl | METHOD AND DEVICE FOR BENDING ROD-SHAPED MATERIAL |
DE9406880U1 (en) * | 1993-05-07 | 1994-07-07 | Progress Ag | Bending machine for bars |
EP0715907A1 (en) * | 1994-12-07 | 1996-06-12 | Peddinghaus, Carl Ullrich, Dr. | Method of bending steel bars, in particular for bending of concrete reinforcement bars to form reinforcement stirrups |
DE19517041A1 (en) * | 1995-03-24 | 1996-09-26 | Muhr & Bender | Transfer system for machine tool |
-
1997
- 1997-05-29 IT ITUD970100A patent/ITUD970100A0/it active IP Right Grant
- 1997-05-29 IT IT97UD000100D patent/IT1295561B1/en active IP Right Grant
-
1998
- 1998-05-25 EP EP98109427A patent/EP0882529A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS58209424A (en) * | 1982-05-31 | 1983-12-06 | Mitsui Eng & Shipbuild Co Ltd | Automatic bending apparatus for steel bar |
DE3919607A1 (en) * | 1989-06-15 | 1991-01-03 | Heinz Ruhl | METHOD AND DEVICE FOR BENDING ROD-SHAPED MATERIAL |
DE9406880U1 (en) * | 1993-05-07 | 1994-07-07 | Progress Ag | Bending machine for bars |
EP0715907A1 (en) * | 1994-12-07 | 1996-06-12 | Peddinghaus, Carl Ullrich, Dr. | Method of bending steel bars, in particular for bending of concrete reinforcement bars to form reinforcement stirrups |
DE19517041A1 (en) * | 1995-03-24 | 1996-09-26 | Muhr & Bender | Transfer system for machine tool |
Non-Patent Citations (1)
Title |
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PATENT ABSTRACTS OF JAPAN vol. 008, no. 057 (M - 283) 15 March 1984 (1984-03-15) * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003024640A1 (en) * | 2001-09-14 | 2003-03-27 | M.E.P. Macchine Elettroniche Piegatrici Spa | Bending machine for profiles, such as reinforcement round pieces or similar |
US7004003B2 (en) | 2001-09-14 | 2006-02-28 | M.E.P. Macchine Elettroniche Piegatrici Spa | Bending machine for profiles |
WO2003045603A1 (en) * | 2001-11-30 | 2003-06-05 | M.E.P. Macchine Elettroniche Piegatrici Spa | Bending machine for profiles such as reinforcement round pieces or similar |
US7104102B2 (en) | 2001-11-30 | 2006-09-12 | M.E.P. Macchine Elettroniche Piegatrici Spa | Bending machine for profiles such as reinforcement round pieces or similar |
EP1952905A1 (en) * | 2007-02-05 | 2008-08-06 | Galanos S.A. | Machine for cutting and bending of iron rods by use of mobile heads and displaceable per section holding guides of straight rod. |
WO2012013729A1 (en) * | 2010-07-28 | 2012-02-02 | Schnell S.P.A. | Method for making reinforcement irons |
JP2017516663A (en) * | 2014-06-06 | 2017-06-22 | エム・イー・ピー・マシーネ・エレトロニーチェ・ピエガトリーチ・エス・ピー・エイM.E.P. Macchine Elettroniche Piegatrici Societa Per Azioni | Completed bending machine and corresponding method |
CN108188307A (en) * | 2017-12-11 | 2018-06-22 | 江门市新会区国正机电设备有限公司 | Full-automatic bending butt welding machine and its processing method |
CN109926518A (en) * | 2019-04-01 | 2019-06-25 | 湖南广播电视大学 | A kind of automatic charging bending machine |
Also Published As
Publication number | Publication date |
---|---|
ITUD970100A0 (en) | 1997-05-29 |
ITUD970100A1 (en) | 1998-11-29 |
IT1295561B1 (en) | 1999-05-13 |
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