EP0536167B1 - Bending machines - Google Patents
Bending machines Download PDFInfo
- Publication number
- EP0536167B1 EP0536167B1 EP91910345A EP91910345A EP0536167B1 EP 0536167 B1 EP0536167 B1 EP 0536167B1 EP 91910345 A EP91910345 A EP 91910345A EP 91910345 A EP91910345 A EP 91910345A EP 0536167 B1 EP0536167 B1 EP 0536167B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lever
- wire
- bending
- slot
- rod
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F23/00—Feeding wire in wire-working machines or apparatus
- B21F23/005—Feeding discrete lengths of wire or rod
-
- 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
-
- 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
- B21F1/008—Bending wire other than coiling; Straightening wire in 3D with means to rotate the wire about its axis
Definitions
- This invention concerns a wire bending machine comprising a bending head having a slot for receiving at least one length of wire and a retaining device movable into a retention position so as to close the open end of the slot, so that during bending the wire is retained in the slot, as for example known from GB-A-2072552.
- Bending machines are known in which the wire to be bent is inserted laterally into a bank of bending heads in each of which at least one length of wire is retained by a device such as a ball catch. This insertion operation is usually manually performed by the machine operator; and it has been found, particularly where a long length of wire is to be bent, that difficulties are frequently experienced by the operator in correctly inserting the wire.
- the retaining device comprises a pivotal lever movable by a ram into a forward position, and a hold-back device engages with a central part of the lever to cause pivoting of the lever into a retention position, in which it is substantially perpendicular to the slot in the bending head.
- FIG. 1 there is shown the general outline of a wire bending machine.
- a coil of wire is fed from a decoiling unit 2, to a straightening unit 4 comprising two sets of opposed rollers, one set having rollers rotatable about horizontal axes while the other set has rollers rotatable about vertical axes.
- Beneath the transfer unit are mounted two banks 12 of bending heads.
- Each bank 12 comprising four bending heads slidable under computer control along a horizontal slide.
- a rotatable clamp 14 Between the two banks of bending heads is a rotatable clamp 14.
- a hydraulic cylinder or ram 22 mounted from a frame 24 of the bending head on which the bending head is individually slidable, as above-mentioned.
- actuating rod 26 Projecting from the cylinder 22 is an actuating rod 26 slidable in a journal bearing 28 forming part of the frame 24.
- a block 30 Fixedly mounted on the rod 26 between the cylinder 22 and the journal bearing 28 is a block 30 in which is slidably carried a smaller rod 32, also slidable in the bearing 28. Pinned to the rod 32 is a further block 34 through which the actuating rod 26 is slidable, a compression spring 3G being located around the rod 26 between the blocks 30 and 34, to urge the block 34 into a forward position.
- an abutment 38 which on forward movement of the rod 26 abuts with an adjustable screw 40 secured to the bearing 28.
- an end block 41 Pinned to the forward end of the smaller rod 32 is an end block 41 through which the forward end of the actuating rod 26 is also slidable.
- a finger or lever 42 Pivoted about the forward end of the actuating rod 26 is a finger or lever 42 to the middle of which is also pivoted a link 44 pivotal about the end block 41.
- the hydraulic cylinder 22 is actuated, causing the actuating rod 26 and the smaller rod 32 to extend forwards, ie to the left as viewed in Figure 2. Both rods continue to be extended until the abutment 38 meets the screw 40, which arrests movement of the smaller rod 32.
- the block 30 slides along the smaller rod 32 until the block 30 meets the abutment block 34.
- the right hand pivot of the link 44 is stationary so that the outward movement of the rod 26 causes clockwise rotation of the lever 42 until it is in an upright position, as shown chain dotted. In this position the free end of the lever 42 is positioned adjacent the slot 18 in the bending head so that it pushes the wire 20 into the slot and retains it therein.
- the device described enables the wires to be more easily set up in the bending heads, and additionally retains the wires in the slots in a more positive manner.
Abstract
Description
- This invention concerns a wire bending machine comprising a bending head having a slot for receiving at least one length of wire and a retaining device movable into a retention position so as to close the open end of the slot, so that during bending the wire is retained in the slot, as for example known from GB-A-2072552.
- Bending machines are known in which the wire to be bent is inserted laterally into a bank of bending heads in each of which at least one length of wire is retained by a device such as a ball catch. This insertion operation is usually manually performed by the machine operator; and it has been found, particularly where a long length of wire is to be bent, that difficulties are frequently experienced by the operator in correctly inserting the wire.
- According to the present invention there is provided a wire bending machine according to claim 1.
- By this means the wire can more rapidly be set up in the bending head and is also more positively located in the slot.
- Where the bending head is movable relative to the remainder of the machine in a direction along the length of the wire (before bending), the retaining device may form part of the bending head.
- The retaining device comprises a pivotal lever movable by a ram into a forward position, and a hold-back device engages with a central part of the lever to cause pivoting of the lever into a retention position, in which it is substantially perpendicular to the slot in the bending head.
- An example of the invention will now be described, with reference to the accompanying drawings, in which:
- Figure 1 is a side view of a bending machine embodying the invention; and
- Figure 2 is a detail of the head of the bending machine.
- Referring first to Figure 1 there is shown the general outline of a wire bending machine. A coil of wire is fed from a decoiling
unit 2, to a straightening unit 4 comprising two sets of opposed rollers, one set having rollers rotatable about horizontal axes while the other set has rollers rotatable about vertical axes. - To the right of the straightening unit the wire is fed to a cropping or shearing unit 6. The severed length of wire is now held by three transfer units, and to the right of the transfer unit is an end trimmer adapted to trim the leading end of the wire.
- Beneath the transfer unit are mounted two
banks 12 of bending heads. Eachbank 12 comprising four bending heads slidable under computer control along a horizontal slide. Between the two banks of bending heads is arotatable clamp 14. - Referring now to Figure 2, there is shown one
bending head 16 rotatable about a horizontal axis and formed with aslot 18 in which a plurality ofwires 20, in this case three wires, are receivable. - Inboard of the
bending head 16, to the right as viewed in Figure 2, is a hydraulic cylinder orram 22 mounted from aframe 24 of the bending head on which the bending head is individually slidable, as above-mentioned. - Projecting from the
cylinder 22 is an actuatingrod 26 slidable in a journal bearing 28 forming part of theframe 24. - Fixedly mounted on the
rod 26 between thecylinder 22 and the journal bearing 28 is ablock 30 in which is slidably carried asmaller rod 32, also slidable in thebearing 28. Pinned to therod 32 is afurther block 34 through which the actuatingrod 26 is slidable, a compression spring 3G being located around therod 26 between theblocks block 34 into a forward position. - At the front end of the
block 34 is anabutment 38 which on forward movement of therod 26 abuts with anadjustable screw 40 secured to thebearing 28. - Pinned to the forward end of the
smaller rod 32 is anend block 41 through which the forward end of the actuatingrod 26 is also slidable. - Pivoted about the forward end of the actuating
rod 26 is a finger or lever 42 to the middle of which is also pivoted alink 44 pivotal about theend block 41. - The operation of the device will now be described.
- Starting with the
actuating rod 26 in its withdrawn position, as shown in solid lines, thehydraulic cylinder 22 is actuated, causing the actuatingrod 26 and thesmaller rod 32 to extend forwards, ie to the left as viewed in Figure 2. Both rods continue to be extended until theabutment 38 meets thescrew 40, which arrests movement of thesmaller rod 32. During further movement of therod 26 against the pressure of thecompression spring 36, theblock 30 slides along thesmaller rod 32 until theblock 30 meets theabutment block 34. During this movement the right hand pivot of thelink 44 is stationary so that the outward movement of therod 26 causes clockwise rotation of thelever 42 until it is in an upright position, as shown chain dotted. In this position the free end of thelever 42 is positioned adjacent theslot 18 in the bending head so that it pushes thewire 20 into the slot and retains it therein. - It will be appreciated that the device described enables the wires to be more easily set up in the bending heads, and additionally retains the wires in the slots in a more positive manner.
Claims (5)
- A wire bending machine comprising a bending head (16) having a slot (18) for receiving at least one length of wire (20) and a retaining device movable into a retention position so as to close the open end of the slot (18), so that during bending the wire (20) is retained in the slot (18), wherein the retaining device comprises a pivotal lever (42) movable by a ram into an extended position, and a hold-back device (44) engageable with a central part of the lever (42) to cause pivoting of the lever (42) into said retention position in which the lever (42) is substantially perpendicular to the slot (18) in the bending head (16).
- A machine according to claim 1 in which the bending head (16) is movable relative to the remainder of the machine in a direction along the length of the wire (20) (before bending), the retaining device forming part of the bending head (16).
- A machine according to claim 2 in which the ram comprises an actuating rod (26), the lever (42) being pivoted to the free end of the rod (26).
- A machine according to claim 3 in which the hold-back device comprises a link (44) pivoted between the central part of the lever (42) and a block (41) movable with the rod.
- A machine according to claim 4 in which the hold-back device further comprises an adjustable abutment (38,40) secured to a fixed part (28) of the machine, the block (41) being slidable on the rod (26) when the block (41) is arrested by the abutment (38,40).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB909014109A GB9014109D0 (en) | 1990-06-25 | 1990-06-25 | Bending machines |
GB9014109 | 1990-06-25 | ||
PCT/GB1991/000851 WO1992000155A1 (en) | 1990-06-25 | 1991-05-29 | Bending machines |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0536167A1 EP0536167A1 (en) | 1993-04-14 |
EP0536167B1 true EP0536167B1 (en) | 1994-07-27 |
Family
ID=10678162
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91910345A Expired - Lifetime EP0536167B1 (en) | 1990-06-25 | 1991-05-29 | Bending machines |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0536167B1 (en) |
DE (1) | DE69103149D1 (en) |
GB (1) | GB9014109D0 (en) |
WO (1) | WO1992000155A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2778124B1 (en) * | 1998-04-17 | 2000-06-23 | Macsoft | METHOD AND DEVICE FOR BENDING WIRE, TUBE OR LARGE PROFILE WITH AUTOMATED DIGITAL CONTROL |
CN112935136B (en) * | 2021-01-19 | 2023-05-05 | 广东竣崑建设有限公司 | Reinforcing bar fixing device that bends based on environmental protection of building engineering |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE524554A (en) * | ||||
AT310531B (en) * | 1970-08-17 | 1973-10-10 | Peddinghaus Paul Ferd Fa | Process for multiple bending of bars and bending system for carrying out the process |
IT1130393B (en) * | 1980-03-31 | 1986-06-11 | Montorfano Off Mecc Snc | CLAMPING AND ROTATION UNIT OF PIPES AND BARS WIRES AND ITS USE IN BENDING MACHINES |
FR2610852B1 (en) * | 1987-02-17 | 1993-07-02 | Picot Sa | TUBE BENDING MACHINE HAVING TWO BENDING HEADS |
-
1990
- 1990-06-25 GB GB909014109A patent/GB9014109D0/en active Pending
-
1991
- 1991-05-29 WO PCT/GB1991/000851 patent/WO1992000155A1/en active IP Right Grant
- 1991-05-29 DE DE69103149T patent/DE69103149D1/en not_active Expired - Lifetime
- 1991-05-29 EP EP91910345A patent/EP0536167B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB9014109D0 (en) | 1990-08-15 |
WO1992000155A1 (en) | 1992-01-09 |
EP0536167A1 (en) | 1993-04-14 |
DE69103149D1 (en) | 1994-09-01 |
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