EP0894032A1 - Dispositif pour le faconnage de pieces - Google Patents

Dispositif pour le faconnage de pieces

Info

Publication number
EP0894032A1
EP0894032A1 EP96933377A EP96933377A EP0894032A1 EP 0894032 A1 EP0894032 A1 EP 0894032A1 EP 96933377 A EP96933377 A EP 96933377A EP 96933377 A EP96933377 A EP 96933377A EP 0894032 A1 EP0894032 A1 EP 0894032A1
Authority
EP
European Patent Office
Prior art keywords
tool
workpiece
workpieces
shaped
plate
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.)
Granted
Application number
EP96933377A
Other languages
German (de)
English (en)
Other versions
EP0894032B1 (fr
Inventor
Engelbert Haslinger
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.)
ACF Engineering and Automation GmbH
Original Assignee
GFI Fertigungstechnik GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7791110&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0894032(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by GFI Fertigungstechnik GmbH filed Critical GFI Fertigungstechnik GmbH
Publication of EP0894032A1 publication Critical patent/EP0894032A1/fr
Application granted granted Critical
Publication of EP0894032B1 publication Critical patent/EP0894032B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work

Definitions

  • the invention relates to a device for deforming workpieces according to the preamble of claim 1.
  • the workpieces to be deformed are usually plates, sheets or foils which are arranged between the two tools so that the part to be deformed is not covered by the tools .
  • a deformation process e.g. Bending work, performed.
  • Devices which carry out deformation work (bending work) on workpieces which are clamped between two worktops.
  • the clamping is usually done mechanically, e.g. by means of screw clamps or press jaws, which are arranged to be hydraulically movable relative to one another.
  • the shape that is to be achieved by the bending work is usually performed by dies or dies.
  • a so-called "free bending” is carried out for the shaping of less complex structures, as are required for profiles or bends. Free bending, however, only allows complex forms to be formed to a certain degree.
  • a device for performing such a method is known from DE 40 09 466.
  • the method described there offers the possibility of producing a very specific type of corner using a specific sheet after a specific tool setting.
  • the presetting of the tools must already be taken into account during the manufacture of the tools, since later modifications which are caused by a different choice of workpiece (workpiece thickness, shelf height, material parameters) cannot be carried out.
  • ERSATZBU ⁇ (RULE 26) This patent also discloses a device for bending and profiling corners, a tool for holding down the workpiece being used for fixing workpieces. This hold-down is rectangular in its basic shape so that it completely covers the area of the corner of the workpiece to be deformed. Due to the complete covering of the corner area, however, the material in this area is prevented from being stretched, so that cracks can arise in the corner area which are not acceptable both for aesthetic and safety reasons.
  • the object of the invention is to provide a device for deforming workpieces, which enables a modification of the tool geometries with respect to the workpieces to be deformed and a reliable, high-quality corner profile.
  • the second tool Since the second tool is equipped with a longitudinal displacement device (hydraulics or pneumatics) and only a displacement in the intended direction is desired, the second tool has a device that allows the second tool to be rotated or displaced in a direction that is not provided shifting device by the longitudinal displacement mechanism, prevented.
  • a longitudinal displacement device hydraulics or pneumatics
  • the device for deforming workpieces on the second tool has a contour that allows workpieces to be clamped without the workpiece material being damaged, but the underside of the second tool can also be designed to be flat if the workpiece material
  • SPARE BLADE (RULE 26) rial is very hard.
  • a flat underside is also advantageous if the workpiece to be deformed has a low hardness, since in these cases a plastic coating on the underside prevents damage to the surface.
  • Another advantage of the device according to the invention is the surface formed in the vicinity of the mold edge, as a result of which a certain area of the workpiece is released from the clamping force, so that the area not covered can be deformed by the hourglass-shaped roller in accordance with the applied force.
  • the device according to the invention has the particular advantage that deformation work, especially corner profiles, can be carried out with high precision and speed.
  • Another advantage of the device according to the invention is the possibility of dimension X, which corresponds to the lateral horizontal distance between the two vertical surfaces of the two tools that are closest to the hourglass-shaped roller, according to different material characteristics such as Workpiece thickness, shelf height, grain size, etc. to vary in order to achieve a reliable high deformation quality.
  • REPLACEMENT BUTT (RULE 26) larger lateral distance, the area of the sheet to be deformed escapes upwards and causes a curvature that is not desired.
  • the rim height ie the length of the area of the workpiece protruding beyond the first tool
  • the assessment and adjustment of the lateral distance is decisive for the assessment and adjustment of the lateral distance, since this area of the workpiece is subjected to a high mechanical load during the deformation, which can cause a curvature.
  • Table 1 shows an example of an assignment of S (workpiece thickness) and X (distance between mold edge and tool) of the device according to the invention in order to achieve a high deformation quality of workpieces.
  • a metallic material such as steel or a steel alloy, is particularly suitable for the design of the hold-down device, but it is also possible to coat the underside of the hold-down device with plastic, which has the advantage that workpieces made of softer materials such as B. aluminum is not accidentally deformed by the plastic coating on its surface, as would be the case with a metal hard surface.
  • very hard or tough workpieces to provide the underside of the hold-down with a very hard metallic layer over the entire surface or to harden it as such (e.g. nitriding, laser surface hardening, case hardening, etc.).
  • the device is used in bending processes whose processing temperature is below the recrystallization temperature of the workpiece material due to the workpiece characteristics, so that the deformation is a cold deformation.
  • Figure 1 is a partially sectioned view of the device with the two tools used for clamping and the deforming tool in the form of a roller.
  • FIG. 2 shows a side view of the second tool with an integrated adjustment possibility for the lateral distance X, the holding surface being made of a metallic material;
  • FIG. 2a shows a side view of the second tool with an integrated adjustment facility for the lateral distance X, the holding surface being coated with a plastic;
  • Fig. 4 is a plan view of the top of the second tool without
  • the holding surface being made of a metallic material.
  • Fig. 5 is a plan view of the top of the second tool
  • the lateral distance can be adjusted, the holding surface being made of a metallic or artificial material.
  • REPLACEMENT BUTT (RULE 26) 1 shows a second tool 2 with a contour in the area 5 and a first tool 1 as well as a workpiece 10 arranged above it, the area to be deformed protruding beyond a shaped edge 3a which closes off the side surface 3 at the top.
  • Another tool 6 is designed as an hourglass-shaped roller that is moved along the side surface 3 during the bending process, so as to deform the workpiece 10 according to the contour of the shaped edge 3a or the side surface 3.
  • the distance X which is decisive for the quality of the deformation, is achieved by an adjustment device (see Fig. 2; 2a) attached to the hold-down device.
  • the second tool 2 is accommodated and moved by a cylindrical device 8, preferably of a hydraulic type (a pneumatic device or a device controlled by toothed linkages can also be used). Due to the one-point bearing of the second tool 2, a device is necessary which guides the tool in such a way that only the desired degree of freedom - displacement in one direction - is retained. 1 with a cylinder 7 arranged parallel to the cylinder 8, which runs in a guide 9.
  • FIG. 2 shows a schematic cross section through a second tool consisting of two parts, the device for adjusting the distance X being integrated in the tool head of the second tool.
  • the adjustability is achieved by means of an elongated hole 13 located in the top of the tool 2 in connection with threaded blind holes 14 arranged underneath, in the actual holding tool 2, in that the screws guided through the elongated hole 13 have a play in the guides 12, that allows to move the lower part of the second tool 2 perpendicular to the screw axes.
  • the screws located in the blind holes 14 are loosened and the lower region of the second tool is adjusted according to the values as can be seen in Table 1.
  • FIG. 2 shows the basic arrangement of the bearings of the force-applying cylinder 8 and of the twisting and displacement device 9 secured by a thread. The detail provided with K is shown enlarged in FIG. 3.
  • FIG. 2a shows the structure, which is identical in principle to that of FIG. 2, with the difference that the underside 5a of the second tool 2 is designed to be flat.
  • the underside 5a can be coated by a material such as. B. consist of plastic or metal, a massive formation of the tool from a material is possible, so that the underside as in Fig. 2 consists of the base material of the second tool, but the underside is flat.
  • the bottom 5a of the second tool z. B. hardened by nitriding, laser surface hardening or case hardening.
  • FIG. 3 shows the detail K according to FIG. 2, the dimension Z being the distance of the second tool 2 from the workpiece surface.
  • the distance Z prevents the second tool 2 from penetrating into the surface of the workpiece 10, since the force that is applied to the workpiece also decreases due to the runout of the holding surface 5, so that no traces of embossing remain on the surface of the workpiece 10 .
  • this precaution is only necessary if the material hardness of the workpiece is below the material hardness of the tool or if the contact pressure is very high.
  • a flat plastic or metal surface can also be used.
  • FIG. 4 shows a top view of an exemplary embodiment of the second tool 2, the second tool 2 having no adjusting device.
  • the surface area A is largely responsible for the deformation quality, since the size of the surface area A or the corresponding surface 11 of the tool does not cover an area of the workpiece to be deformed and thus it is not exposed to a force. This freedom from stress enables the workpiece to flow in this area in accordance with the force exerted by the third tool and form the desired corner.
  • the holding surface 5 shown in dashed lines extends like a frame along the corner to be formed and into the rear region of the second tool 2, a distance being present between its free end sections. However, the two end sections can also be connected to one another.
  • FIG. 5 shows a top view of the second tool as in FIG. 4 with the difference that the underside (FIG. 2a) is flat and the tool has an adjusting device 13.
  • the adjusting device 13 is realized by an elongated hole with bores in the top of the tool 2, into which set screws (not shown) can engage. Due to the symmetrical arrangement of the elongated hole along the bisector of the corner angle, the two parts forming the tool 2 can be laterally displaced relative to one another in both horizontal directions in order to set the dimension X. The amount to be set is shown in Table 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

L'invention a pour objet un dispositif pour le façonnage de pièces en forme de plaques utilisant, comme outil de cintrage, un rouleau en forme générale de sablier, chacune de ces pièces étant montée serrée entre un premier et un deuxième outil. Le deuxième outil présente un surface presse-tôle au niveau de laquelle les surfaces latérales verticales superposées des outils sont décalées mutuellement d'une grandeur horizontale X correspondant au maximum à cinq fois l'épaisseur de la pièce en forme de plaque. Le deuxième outil présentant la surface presse-tôle est chanfreiné pour former une autre surface verticale dans la zone A, dans laquelle la pièce en forme de plaque est façonnée de manière à prendre la forme d'un coin et où l'outil ne recouvre pas la pièce.
EP96933377A 1996-04-12 1996-09-24 Dispositif pour le faconnage de pieces Expired - Lifetime EP0894032B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19614517 1996-04-12
DE19614517A DE19614517A1 (de) 1996-04-12 1996-04-12 Vorrichtung zum Verformen von Werkstücken
PCT/EP1996/004176 WO1997038806A1 (fr) 1996-04-12 1996-09-24 Dispositif pour le façonnage de pieces

Publications (2)

Publication Number Publication Date
EP0894032A1 true EP0894032A1 (fr) 1999-02-03
EP0894032B1 EP0894032B1 (fr) 2000-07-12

Family

ID=7791110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96933377A Expired - Lifetime EP0894032B1 (fr) 1996-04-12 1996-09-24 Dispositif pour le faconnage de pieces

Country Status (5)

Country Link
US (1) US6047585A (fr)
EP (1) EP0894032B1 (fr)
AT (2) ATE194519T1 (fr)
DE (1) DE19614517A1 (fr)
WO (1) WO1997038806A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT410289B (de) * 2000-01-26 2003-03-25 Acf Engineering & Automation G Verfahren und vorrichtung zur bildung einer dreiseitig begrenzten ecke aus einem ebenflächigen, plattenförmigen material
EP1202825B1 (fr) 1999-05-17 2003-10-15 "ACF" Engineering & Automation GmbH Procede et dispositif pour la formation d'un coin limite sur trois cotes a partir d'un materiau en forme de plaque et a surface plane
US7043952B2 (en) * 2003-11-14 2006-05-16 Rsm. At Kraus & Pleniger Oeg Method and apparatus for forming flange corners
US10478884B2 (en) 2015-07-15 2019-11-19 Heinrich Daniel Dechamps Method and device for forming from a flat sheet material a corner bounded by three sides
CN110465600B (zh) * 2019-09-03 2024-07-02 湖北天佳环保科技有限公司 一种自动提环折弯机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2476596A (en) * 1949-07-19 Bending and anvil die for fmgmt
US2175679A (en) * 1937-06-07 1939-10-10 Beatty Machine & Mfg Co Flanging machine
DE4009466C2 (de) * 1990-03-23 1994-07-14 Gfi Ges Fuer Ingenieurtechnik Vorrichtung zum Bilden einer dreiseitig begrenzten Ecke eines Blechs
JPH0576940A (ja) * 1991-09-24 1993-03-30 Hitachi Ltd 板ばねの成形方法
IT1266190B1 (it) * 1994-07-29 1996-12-23 Sapim Amada Spa Pressa piegatrice per lamiere.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9738806A1 *

Also Published As

Publication number Publication date
ATE194519T1 (de) 2000-07-15
US6047585A (en) 2000-04-11
WO1997038806A1 (fr) 1997-10-23
AT3251U2 (de) 1999-12-27
DE19614517A1 (de) 1997-10-16
EP0894032B1 (fr) 2000-07-12

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