EP0566938A1 - Verfahren und Biegemaschine zum Herstellen eines gebogenen Draht- oder Rohrstücks mit einem Stauchteil - Google Patents

Verfahren und Biegemaschine zum Herstellen eines gebogenen Draht- oder Rohrstücks mit einem Stauchteil Download PDF

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Publication number
EP0566938A1
EP0566938A1 EP93105856A EP93105856A EP0566938A1 EP 0566938 A1 EP0566938 A1 EP 0566938A1 EP 93105856 A EP93105856 A EP 93105856A EP 93105856 A EP93105856 A EP 93105856A EP 0566938 A1 EP0566938 A1 EP 0566938A1
Authority
EP
European Patent Office
Prior art keywords
bending machine
wire
clamping jaws
upsetting
head
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.)
Withdrawn
Application number
EP93105856A
Other languages
German (de)
English (en)
French (fr)
Inventor
Friedhelm Post
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FRIEDHELM POST SONDERMASCHINEN
Original Assignee
FRIEDHELM POST SONDERMASCHINEN
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by FRIEDHELM POST SONDERMASCHINEN filed Critical FRIEDHELM POST SONDERMASCHINEN
Priority to CA002094682A priority Critical patent/CA2094682A1/en
Priority to JP5096207A priority patent/JPH06142813A/ja
Publication of EP0566938A1 publication Critical patent/EP0566938A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/12—Riveting machines with tools or tool parts having a movement additional to the feed movement, e.g. spin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F5/00—Upsetting wire or pressing operations affecting the wire cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/025—Special design or construction with rolling or wobbling dies

Definitions

  • the invention relates to a method according to the preamble of claim 1 and to a bending machine for performing the method according to the preamble of claim 2.
  • the bending of wire or pipe pieces in bending machines is generally known (DE-B-37 12 110 and DE-B-38 25 393).
  • the wire or tube is drawn off a coil, straightened and introduced into the bending machine by means of a feed device.
  • Drivable benders introduce predetermined bends into the incrementally advancing wire or tube before a severer cuts the bent piece of wire or pipe that is ejected.
  • a compression part within the piece of wire or pipe or at least at one end thereof.
  • One example is the mounting of a silencer pot on the chassis of an automobile. A first bent wire or pipe piece is welded to the chassis, while a second bent wire or pipe piece is welded to the silencer pot.
  • the two free ends of the wire or tube pieces are connected by a rubber element that has insertion openings for the ends of both wire or tube pieces.
  • the upsetting parts are intended to prevent the ends of the two wire or tube pieces from coming loose automatically from the openings of the rubber element.
  • a chamfer on the free end which may be molded on, facilitates insertion. While the bending of wire or pipe pieces in the bending machine has already reached a high degree of automation, the shaping of the upsetting parts becomes later in specially designed machines. This requires additional steps and space and is time and labor intensive, which is particularly undesirable for inexpensive mass production.
  • the object is achieved in connection with the preamble features of claim 2 according to the invention in that in the feed direction behind the feed device a clamping device which can be moved transversely to the feed axis and has at least one compression tool behind the jaws, and that the compression tool and / or the clamping device is or are arranged to be movable in the direction of the feed axis in the bending machine.
  • a compression part such as a bead within the length of the piece and / or a head and / or a chamfer at the end of the pipe or wire piece within the bending machine, specifically before, during or after bending.
  • the feed devices provided for bending operations can be used to transfer the piece of wire or pipe to the deformation device consisting of the clamping jaws and the upsetting tool.
  • the wire or pipe pieces are already determined in the bending machine with the at least one molded compression part. On the one hand, this enables economical mass production, but on the other hand it is inexpensive even with small batch sizes.
  • a wobble rivet head is provided as the upsetting tool, the projecting free end of the pipe or wire piece is riveted against the outside of the clamping jaws. Since the piece of wire or pipe lies in the parting plane of the clamping jaws, the finished workpiece can be easily removed from the mold despite the head being moved apart.
  • the clamping jaws are provided with a counter shoulder, which is surrounded by an edge, and have opposite projections on their clamping surfaces.
  • the free end of the wire or pipe piece is riveted against the counter shoulder in order to achieve a defined head shape.
  • the frustoconical edge leaves room for the wobble head to be attached.
  • the projections result in a particularly high specific contact pressure, as a result of which the forces to be applied to the clamping jaws can be kept comparatively low. A particularly good, form-fitting hold can be achieved with the projections.
  • the upsetting tool is a head pressure stamp. This essentially only needs to be adjusted in the direction of the feed axis, to shape the head on the jaws.
  • the compression tool is a plunger with a chamfer-shaped cavity.
  • the chamfer necessary at the end of the piece of wire or pipe is formed by linear pressing, a bulge not necessarily being formed at the same time.
  • the upsetting tool is a pressure ram with a bead-upsetting end face and a cylindrical mold cavity. With the upsetting tool, a bead is formed within the length of the piece by essentially linear pressing, the clamping jaws acting as counterholders.
  • the upsetting tool is a pressing die with a cylindrical mold cavity, a bead-upsetting end face and an internal chamfer pressing section.
  • a bead is formed on the clamping jaws with a linear pressing movement.
  • a chamfer is formed with the chamfer pressing section at the free end. The free end of the pipe or wire piece is supported in the cylindrical mold cavity during the deformation.
  • the upsetting tool is formed by further clamping jaws which can be moved together transversely to the feed axis.
  • the further clamping jaws grip the free end projecting beyond the clamping jaws and form a bulge within the length of the piece between them and the clamping jaws by means of a feed movement in the direction of the clamping jaws. If the length of the protruding end is significantly greater than the width of the other jaws, the other can Jaws projecting free end can also be compressed against the other jaws of a head or a chamfer. This is particularly simple if, in a further embodiment, the further clamping jaws are provided between the clamping device and the head pressure ram or the wobble rivet head or the bevel pressure ram.
  • the further clamping jaws can be moved in the direction of the feed axis, either by means of a separate drive or in a floating bearing by means of the head pressure plunger moved by a drive. If the other clamping jaws can be moved individually, the bead can be deformed regardless of the shape of the chamfer or the head. If, on the other hand, the other clamping jaws are floating, the head pressure stamp must form both the bead and the head or the chamfer. These deformation processes can take place simultaneously or in succession.
  • the clamping jaws are expediently each connected to a hydraulic actuator.
  • the clamping force can be easily adjusted via the hydraulic pressure and the clamping jaws can be adjusted in the desired manner.
  • the actuator carrying the wobble head is a rotatably mounted shaft which can be set in rotation by an electric motor and can be adjusted by the hydraulic actuator. By simultaneously rotating and advancing the shaft, the free end of the wire or Pipe piece deformed against the jaws.
  • the production of a piece of wire or pipe with at least one integrally molded upsetting part can be further simplified in that a control device is provided which automatically switches on the hydraulic actuators and the other drives after the clamping jaws have been closed, in order to form the upsetting part or parts to form the head by means of the wobble rivet head.
  • upsetting parts can be easily formed in the desired shape at both free ends or within the length of the piece, which may be desirable in some applications.
  • wire or a tube C is fed to the bending machine 1, which is or is drawn off by a reel 6 in the feed direction S.
  • the wire or the tube C passes through the individual areas of the bending machine 1 in a predetermined manner and is finally ejected as a separated and completely bent piece of wire or tube 5 with at least one one-piece upsetting part T (FIG. 4).
  • a deformation device 4 designed as a riveting device in the bending machine 1.
  • This comprises a housing 7, on which clamp jaws 8, 9, which can be advanced transversely to the feed direction S, are provided, which are driven, for example, by hydraulic cylinders 10, 11 and which are supported in the direction of the feed axis on the housing 7 or the chassis of the bending machine 1 are.
  • a wobble riveting device 12 is arranged behind the clamping jaws 8, 9. This includes, as an upsetting tool W, a wobble rivet head 13 with a tool insert 14 inserted at an angle.
  • the wobble rivet head 13 is fastened at the end of a shaft 16 which can be rotatably mounted in two housing supports 15.
  • a gear is rotatably but slidably in the axial direction of the shaft 16.
  • the gearwheel 17 is held in position by the housing supports 15 and is prevented from moving with the shaft 16.
  • a pinion 18 of an asynchronous motor 19 is provided parallel to the gear 17 and drives the shaft 16, for example via a toothed belt or a chain 20 or a gear.
  • a bearing unit 21 is provided which has a mounting receptacle 22 for a piston rod 23 of a hydraulic cylinder 24.
  • the mounting receptacle 22 is rotatably mounted relative to the shaft 16. With the hydraulic cylinder 24, the shaft 16 can be pushed back and forth in the direction of the double arrow in FIG. 2.
  • a control device 25 is provided, to which the hydraulic cylinders 10, 11 and 24 or their control valves (not shown) and the asynchronous motor 19 are connected.
  • a similar control device is also provided for the embodiments of FIGS. 5 through 12 to operate the movable components.
  • Fig. 3 the jaws 8, 9 are moved together, they hold the wire or pipe piece 5 in such a way that a free end 26 protrudes in the feed direction S from the jaws 8, 9.
  • the clamping surfaces of the jaws 8, 9 have projections 27 which dig into the surface of the wire or tube. Following the projections 27, a counter shoulder 28 facing the wobble rivet head 13 is provided, which is surrounded by a frustoconical edge.
  • the free end 26 is moved between the clamping jaws 8, 9 with a feed device, not shown, until the free end 26 protrudes.
  • the free end 26 is so long that its volume corresponds approximately to the volume of the head 29 to be molded.
  • the control device 25 causes the hydraulic cylinder 24 and the asynchronous motor 19 to operate.
  • the asynchronous motor 19 rotates the shaft 16 and the wobble head 13.
  • the hydraulic cylinder 24 pushes the shaft 16 in the direction D (FIG. 3) onto the free end 26.
  • the inclined tool insert 14 forms the free end 26 into the head 29.
  • the force applied by the wobble rivet head 13 is absorbed by the housing 7 or the chassis of the bending machine, which supports the clamping jaws 8, 9.
  • the shape of the head 29 is determined by the counter shoulder 28 and the inclined tool insert 14.
  • the control device 25 causes the asynchronous motor 19 to be switched off and the hydraulic cylinder 24 to be switched over so that the shaft 16 is withdrawn. Then the jaws 8, 9 are opened, after which the wire or pipe section 5 of the others Processing is fed or, if already bent and separated, is ejected.
  • the head 29 forming the upsetting part T is produced by a head pressure ram 30 which has, for example, a truncated cone-shaped, open mold cavity and in direction D against the closed clamping jaws 8, 9 holding the pipe or wire piece 5 is pressed.
  • the undeformed, initially protruding end is indicated by dashed lines.
  • the pipe or wire piece 5 optionally consists of solid material at 5a or of pipe material at 5b, expediently of metallic material.
  • the clamping jaws 8, 9 are adjusted in the direction D 'instead of the head pressing die 30 in order to form the head 29. Then the head press ram 30 is supported.
  • the compression part T to be formed is a, for example, conical chamfer 33 on the free end of the pipe or wire piece 5.
  • the clamping jaws 8, 9 hold the pipe or wire piece 5 in such a way that a predetermined piece of the free one End protrudes beyond the jaws 8, 9.
  • the upsetting tool W is a chamfering plunger 32 with a conical mold cavity 34 which, for example, continues into a blind bore 35.
  • the punch 32 is moved in the direction of an arrow D against the closed jaws 8, 9. It is also conceivable to move the clamping jaws 8, 9 relative to one another or both when the punch 32 is stationary.
  • the chamfer pressing die 32 has an end face 36 which can be used to form a compression part.
  • the compression part T could be a bead 38, which is either formed in front of the chamfer 33 between the end face 36 and the flat surfaces of the clamping jaws 8, 9, or which is in a mold cavity 37 (indicated by dashed lines) either in the clamping jaws 8, 9 or could also be formed in the end face 36 of the stamp 32.
  • the compression part T is a bead 38 within the length of the piece.
  • a plunger 39 with a cylindrical mold cavity 40 is pushed in the direction D over the free end 26 compresses it, so that the bead 38 is formed between the jaws 8, 9 and the end face 42 of the plunger 39.
  • the inlet into the mold cavity 40 could be hollowed out as a negative shape (indicated at 41) for the bead 38.
  • Either the punch 39 and / or the clamping jaws 8, 9 are adjusted as a whole along the feed axis.
  • An indicated abutment G represents either the support of the clamping jaws 8, 9 in the bending machine or a drive part with which the clamping jaws 8, 9 can be adjusted against the punch 39.
  • a bead 38 is formed within the length of the piece.
  • the wire or pipe piece 5 is fixed between the jaws 8, 9 and then gripped at a distance in front of the jaws 8, 9 by further jaws 8 ', 9', which is adjusted in the direction D against the jaws 8, 9 will.
  • Form cavities 37 are expediently provided in the end faces of both pairs of jaws 8, 9, 8 ', 9' in order to form the bead 38 cleanly.
  • the free end 26 of the wire or tube piece 5 projects beyond the further clamping jaws 8 ', 9' and can - if necessary - additionally be provided with a head 29 or a chamfer 33 if this is necessary. It is also indicated in FIG. 8 that either the jaws 8, 9 or / and the further jaws 8 ', 9' are adjustable along the feed axis.
  • two upsetting parts T are integrally formed on the wire or tube piece 5, namely a bead 38 within the piece length and a head 29 at the free end.
  • the wire or tube piece 5 is first fixed with the jaws 8, 9. Then the other jaws 8 ', 9' engage at a distance from the jaws 8, 9 at the free end 26. The free end 26 also extends beyond the further clamping jaws 8 ', 9'.
  • the head press stamp 30 is then attached to this projecting end.
  • the bead 38 can be formed by adjusting the further clamping jaws 8 ', 9' in the direction of the clamping jaws 8, 9.
  • the head 29 is then formed by adjusting the stamp 30 in the D direction.
  • two spaced upsetting parts are formed, namely a bead 38 and a chamfer 33 at the free end.
  • the jaws 8, 9 hold the pipe and wire piece 5.
  • the punch 43 is adjusted in the direction D, which has a mold cavity 44 with a conical chamfer-shaped section 44 '.
  • a mold cavity 37 for the bead 38 is formed in the front end 36 of the punch 43.
  • the length of the projecting free end 26 is dimensioned such that the chamfer 33 is first formed in the section 44 ', and only then, if necessary, is the bead 38 formed until the end face 36 bears against the clamping jaws 8, 9.
  • two upsetting parts T are formed on the wire or tube piece 5, namely a bead 38 and a head 29.
  • the bead 38 is formed by the further clamping jaws 8 ', 9' in cooperation with the clamping jaws 8, 9 manufactured in the manner already explained.
  • the free end 26 of the wire or tube piece 5 projects beyond the further jaws 8 ', 9' so that the wobble rivet head 13 can form the head 29.
  • the head 29 can be shaped before or after the bead 38 is formed. It would also be conceivable here to hold the further clamping jaws 8 ', 9' and to adjust the clamping jaws 8, 9 in the feed direction, while at the same time the wobble head 13 forms the head.
  • two Upsetting parts T are formed on the wire or tube piece 5, namely a bead 38 and a chamfer 33.
  • the chamfer -Druckstempel 32 with its mold cavity 34 used independently of the other jaws 8 ', 9', which form the bead 38 with the jaws 8, 9.
  • the further clamping jaws 8 ', 9' which can be moved back and forth in the direction of the feed axis, could alternately serve as the upsetting tools for shaping the bead 38 and a head 29, specifically when the distance between the head 29 and bead 38 is larger than the width of the further clamping jaws 8 ', 9'.
  • the further clamping jaws 8 ', 9' are initially fixed at the free end and then adjusted against the feed direction in order to form the bead 38. Then the further clamping jaws 8 ', 9' are opened again and set back so far that they have the correct position for forming the head 29. Then the further clamping jaws 8 ', 9' are closed again in order to hold the free end in place before the punch 30 or 32 begins to deform the projecting free end.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Wire Processing (AREA)
EP93105856A 1992-04-22 1993-04-08 Verfahren und Biegemaschine zum Herstellen eines gebogenen Draht- oder Rohrstücks mit einem Stauchteil Withdrawn EP0566938A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002094682A CA2094682A1 (en) 1992-04-22 1993-04-22 Method and bending machine for making a piece of bent wire or tube including an upset part
JP5096207A JPH06142813A (ja) 1992-04-22 1993-04-22 アプセット部の成型方法並びに曲げ装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19924213228 DE4213228C1 (da) 1992-04-22 1992-04-22
DE4213228 1992-04-22

Publications (1)

Publication Number Publication Date
EP0566938A1 true EP0566938A1 (de) 1993-10-27

Family

ID=6457244

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93105856A Withdrawn EP0566938A1 (de) 1992-04-22 1993-04-08 Verfahren und Biegemaschine zum Herstellen eines gebogenen Draht- oder Rohrstücks mit einem Stauchteil

Country Status (2)

Country Link
EP (1) EP0566938A1 (da)
DE (1) DE4213228C1 (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1010358C2 (nl) * 1998-10-20 2000-04-25 Brink Bv Van Den Emmerbeugelmachine.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1009215C1 (nl) * 1998-05-19 1999-11-22 Ashworth Jonge Poerink Bv Werkwijze voor het assembleren van een transportband en vloeidoorn.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3247200A1 (de) * 1982-12-21 1984-07-05 Emil Wolff, Maschinenfabrik Und Eisengiesserei Gmbh, 4300 Essen Verfahren und biegepresse zum biegen eines geraden rohres zu einem rohrbogen mit angeschlossenen geraden schenkeln
CA1272402A (en) * 1984-10-24 1990-08-07 Commander Electrical Materials, Inc. Staple for electrical cable
EP0407657A1 (de) * 1989-07-08 1991-01-16 WAFIOS MASCHINENFABRIK GmbH & Co. KOMMANDITGESELLSCHAFT Staucheinrichtung zum Stauchen der Enden länglicher Werkstücke wie Drahtstücke und Verwendung einer solchen Einrichtung in einer drahtverarbeitenden Stiftpresse

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3247200A1 (de) * 1982-12-21 1984-07-05 Emil Wolff, Maschinenfabrik Und Eisengiesserei Gmbh, 4300 Essen Verfahren und biegepresse zum biegen eines geraden rohres zu einem rohrbogen mit angeschlossenen geraden schenkeln
CA1272402A (en) * 1984-10-24 1990-08-07 Commander Electrical Materials, Inc. Staple for electrical cable
EP0407657A1 (de) * 1989-07-08 1991-01-16 WAFIOS MASCHINENFABRIK GmbH & Co. KOMMANDITGESELLSCHAFT Staucheinrichtung zum Stauchen der Enden länglicher Werkstücke wie Drahtstücke und Verwendung einer solchen Einrichtung in einer drahtverarbeitenden Stiftpresse

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1010358C2 (nl) * 1998-10-20 2000-04-25 Brink Bv Van Den Emmerbeugelmachine.
EP1002733A1 (en) * 1998-10-20 2000-05-24 van den Brink B.V. Bucket handle machine

Also Published As

Publication number Publication date
DE4213228C1 (da) 1993-05-13

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