EP4486524A1 - Matrize für eine biege- oder abkantvorrichtung sowie eine biege- oder abkantvorrichtung - Google Patents
Matrize für eine biege- oder abkantvorrichtung sowie eine biege- oder abkantvorrichtungInfo
- Publication number
- EP4486524A1 EP4486524A1 EP23715001.6A EP23715001A EP4486524A1 EP 4486524 A1 EP4486524 A1 EP 4486524A1 EP 23715001 A EP23715001 A EP 23715001A EP 4486524 A1 EP4486524 A1 EP 4486524A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bending
- die
- section
- workpiece
- sliding
- 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
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
- B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
- B21D5/0209—Tools therefor
- B21D5/0263—Die with two oscillating halves
Definitions
- the invention relates to a die for a bending or edging device, and to a bending or edging device with such a die.
- the return of the sliding elements is accomplished by spring elements or an elastic design of a portion of the sliding elements, which exert a prestressing force to move the sliding elements parallel to the bearing surface on the bending cheeks in a mutual separation direction, but still allow them to move in a mutual approach direction to move toward the pivotable member against the biasing force along with the stretching of the workpiece during the bending process.
- the movable plates are secured to the pivoting elements by locking elements, heads of the locking elements being positioned outside the movable plates and serving as stop means to limit the pivoting elements in their initial position under the biasing force.
- a similar construction is also disclosed in US 2017259316 A1. If the spring elements are omitted or broken, the sliding element would be able to move without forces, but it would have to be pushed back to the starting position manually or by an additional device after each bending process.
- DE 19840563 CI discloses a device for die bending, for free bending or for embossing-bending, with a die having a notch and a punch for pressing in a workpiece to be bent that lies over the notch.
- the device has intermediate plates which engage over the edges of the notch, which have a shielding effect on the workpiece and can each be pivoted about axes running parallel to the edges of the notch.
- the intermediate plates keep the work piece away from the notch edges and thereby prevent damage to the work piece by the notch edges or mutual entanglement and falsification of the deformation.
- These intermediate plates can be pivoted or displaced without pivoting and without force in the form of sliding elements, specifically in the sense that they can at least partially and essentially follow the movement and deformation of the workpiece during bending.
- the object of the present invention was a device which, with increased functional reliability and a simple structure, enables the effective and material-friendly processing of workpieces.
- another aim of the invention is an advantageous shape for this.
- the device according to the invention is based on a die for a bending or folding device, comprising a base body; at least one pair of bending cheeks, which are mounted symmetrically to a central plane of the die about axes parallel to this central plane and are passively pivotable in the base body, and which form a flat support surface in the basic position and form a V-shaped die in the base body in the folded position; at least one restoring element for each bending beam, which applies a force to the bending beam towards the basic position; at least one sliding element for each bending beam, with two sliding elements in the basic position lying symmetrically to the central plane on the bending beams and with level support sections forming a level, preferably closed support surface for a workpiece parallel to the support surface of the bending beams, and which are arranged so that they during of the bending process can slide parallel to the support surface and transversely to the axis with a workpiece to be machined on the support surface of the bending beam, with a widened edge portion of each
- the die is characterized by a support section that is rigidly arranged on the sliding element, in the basic position of the bending beam and the sliding element rests against a stationary support point on the base body during the bending process and is free of forces and lifted from the support point in the bending position.
- spring elements or resilient sections of the sliding elements can be avoided, which both represent an increased structural effort and can break or cause other disruptions that can lead to disruptions in the process flow and/or damage to the workpiece.
- the support section is preferably offset outside the plane of the bearing section of the sliding element in the direction of the base body and offset parallel to the bearing section from the outermost edge of the bearing section of the sliding element to the central plane.
- a structurally simple solution to give the sliding element sufficient mobility is an embodiment according to the invention in which at least one connecting section, preferably concave in the direction of the base body, extends between the outermost edge of the bearing section of the sliding element and the support section. This shape of the outer section of the sliding element allows it to slide into the die with the workpiece without prematurely striking the bending cheeks or components connected thereto.
- An advantageous embodiment with a support section which is formed by an edge strip of the connecting section arranged perpendicularly to the support section, results in a large-area contact area between the sliding element and the support section, which ensures a low surface load and thus prevents damage to the sections of the sliding elements that come into contact and the Support points can be significantly reduced or prevented entirely.
- a further embodiment of a die according to the invention is characterized in that a preferably adjustable limiting element is arranged in the area of the articulation of the restoring element on the bending beam, which limits the outermost position of the Sliding element defined on the bending beam.
- the sliding elements are thus limited in their displaceability away from the center plane of the device, and the starting position for the start of the machining process is always the same and can be reproduced.
- the sliding elements are preferably fastened to the bending cheeks in a detachable manner.
- a further advantageous embodiment of the invention provides that at least one mushroom-shaped fixing element is arranged in the area of the articulation of the restoring element on the bending beam, and that at least one keyhole-shaped recess is arranged in the area of the support section of the sliding element, which fits and interacts with the fixing element.
- a simple retrofitting of existing devices is the advantage of a further embodiment of a die in which at least one retaining clip is used in the area of the articulation of the restoring element on the bending beam, to which the limiting element and/or the fixing element is attached or can be attached.
- the retaining clip includes a first section that has a receptacle for the delimiting element or the fixing element.
- This receptacle is preferably a threaded hole into which a screw can be inserted, which acts as a limiting element or fixing element.
- the first section preferably runs parallel to the support section of the sliding element.
- the retaining clip also has a second section with a connection s structure with the bending beam, preferably its spring anchor.
- a particularly quick and easy assembly of the retaining clip is possible with an embodiment in which the second section of the retaining clip has an opening through which the spring anchor of the bending beam can be passed, the second section running essentially transversely to the first section.
- the second section of the holding clip preferably lies between the bending beam and a transverse bore for hanging in the restoring element in the position of use. Fixing by means of the restoring element suspended in the transverse bore is preferably provided, as a result of which additional fixing devices can be avoided.
- the subject matter of the present invention is also a complete bending or edging device, comprising at least one die with a base body and at least one pair of bending cheeks, which bending cheeks are passively pivotably mounted in the base body symmetrically to a center plane of the die about axes parallel to this center plane, and which form a flat support surface in the basic position and form a V-shaped die in the base body in the folded position; at least one restoring element for each bending beam, which restoring element applies a force to the bending beam towards the basic position; at least one sliding element for each bending beam, with two sliding elements in the basic position lying symmetrically to the central plane on the bending beams and with level support sections forming a level, preferably closed support surface for a workpiece parallel to the support surface of the bending beams, and which are arranged so that they during parallel to the support surface and transverse to the axis with a workpiece to be machined on the support surface of the bending beam, with a widened edge section of each
- several matrices can also be arranged in a row in a longitudinal direction with a common central plane, for bending a workpiece that is longer than a single matrix.
- at least one sliding element is longer than a single matrix, preferably the same length or longer than the workpiece.
- FIG. 2 shows the upper area of a die according to a preferred embodiment of the invention, with an attached sliding element, in a perspective view;
- FIG. 3 shows a vertical cross-section through the die of FIG. 2, perpendicular to the median plane, on the right-hand side with a retaining clip for the sliding element according to a preferred embodiment
- FIG. 4 shows a view according to FIG. 2 of a die with secured sliding elements on both bending cheeks as a support surface;
- FIG. 5 shows a vertical cross-section according to FIG. 3 of a bending or edging device with a die according to FIG. 4, in a position at the start of the deformation process;
- FIG. 6 shows a vertical cross-section through a device according to FIG. 5, in a position at the end of the deformation process.
- the die 1 for a bending or edging device comprises a base body 2 in which at least one pair of bending cheeks 3 are held.
- the bending cheeks 3 are mounted passively pivotably in the base body 2 symmetrically to a center plane M of the die 1 about axes B lying parallel to this center plane.
- Fig. 1 - form a flat support surface 4 for the workpiece W to be machined
- Fig. 5 and Fig. 6 - form a V-shaped die in the base body 2.
- At least one restoring element 5, preferably in the form of a tension spring, is provided for each bending beam 3.
- restoring elements 5 that act on one and the same bending beam 3, with the region of the articulation of the restoring element 5 on the bending beam 3, for example, as a pin-shaped Spring anchor 3a is designed with a transverse bore for hanging the tension spring used as a restoring element 5.
- the restoring element 5 acts on the bending beam 3 with a force which is able to return the bending beam 3 from any position rotated about the axis B from the basic position back into the basic position if no other forces are acting on the bending beam 3 .
- each two sliding elements 6 are also arranged symmetrically to the center plane M in the basic position.
- a broadened edge section 8 of each sliding element 6 protrudes beyond the outer edge of the bending beam 3, which is remote from the center plane M of the die 1, further away from the center plane M to the outside.
- Each sliding element 6 also has at least one support section 9, which is arranged rigidly on the sliding element 6, preferably in one piece with the sliding element 6 as an edge strip arranged perpendicular to its support section 7.
- the support section 9 lies outside the plane of the bearing section 7 of the sliding element 6 and is additionally arranged offset in the direction of the base body 2 or in the direction of the central plane M from the outermost edge of the bearing section 7 of the sliding element 6 to the central plane M.
- the support section 9 is preferably offset inwards from the edge section 8, in particular from its inner region.
- the edge of the bearing section 7 of the Sliding element 6 inwards towards the base body 2 and towards the support section 9 at least one connecting section 10.
- the connecting section 10 is preferably concavely curved in the direction of the base body 2 so that it can nestle against the outside of the bending beam 3.
- the connection s from section 10 then merges into the support section 9, which thus forms the edge strip of the connection section 10.
- a support point 11 that is stationary at every stage of the machining process of the workpiece is provided.
- This support point 11, which is stationary at least during the machining process of the workpiece, is preferably arranged on the base body 2 of the die 1 and is formed in particular by its outer side surface, possibly also by projections, strips, bulges or similar structures.
- the support section 9 is force-free and lifted from the support point 11.
- a preferably adjustable limiting element 12 is advantageously arranged in the region of the articulation of the restoring element 5 on the bending beam 3 .
- This limiting element 12 forms a stop for the sliding element 6 when it moves outwards, away from the central plane M of the die 1 , and thus defines the outermost position that the sliding element 6 can assume on the bending beam 3 .
- the limiting element 12 embodied, for example, as a screw or rivet with a narrower shank 13 and a widened or mushroom-shaped head 14 can also serve as a fastening for the sliding element 6 .
- the sliding elements 6 are preferably fastened to the bending cheeks 3 so that they can be removed.
- a particularly simple and therefore preferred arrangement for removable temporary fixing of the sliding elements 6 on the bending cheeks 3 comprises a fixing element which is widened mushroom-shaped at the outer end, with the limiting element 12 also taking on the function of the fixing element in the exemplary embodiment shown. If it is designed as a separate element, the fixing element is also positioned in the area of the articulation of the restoring element 5 on the bending beam 3 .
- At least one keyhole-shaped recess 15 is preferably arranged in the region of the support section 9 of the sliding element 6, which fits and interacts with each limiting element 12 or fixing element.
- This recess 15 has a section whose width is slightly larger than the widened part of the fixing element, for example larger than the diameter of the head 14 of a screw.
- the recess 15 also has a narrower section, the width of which is smaller than the diameter of the head 14, but slightly larger than the diameter of the shank 13 of the screw or each fixing element or limiting element 12.
- a simple solution for attaching the delimiting element 12 or fixing element, which is also well suited for retrofitting existing devices, can be seen very well in FIG. 3, but also in FIGS. 5 and 6.
- At least one retaining clip 16 is used in the area where the restoring element 5 is articulated on the bending beam 3 .
- a first section of the retaining clip 16 has a receptacle for the delimiting element 12 or the fixing element and preferably runs parallel to the support section 9 of the sliding element 6. In the basic position of the die 1, this first section of the retaining clip 16 is preferably also parallel to the side surface of the base body 2 of the Die 1 and does not protrude beyond the base body 2 at any point.
- An opening with an internal thread is preferably provided as a receptacle, into which a screw can be screwed as a limiting element 12 . Depending on how deep the screw is screwed into the opening, the lateral limit for the sliding element 6 can be adjusted.
- a second section of the retaining clip 16 has a connection structure with the bending beam 3 .
- the spring anchor 3 a whereby additional components to be attached or a more complicated shaping of the bending beam 3 can be avoided.
- an opening is preferably made with a width such that the pin-shaped spring anchor 3a of the bending cheek 3 fits through and the retaining clip 16 can thus be pushed onto the spring anchor 3a.
- the angle between the first and the second section of the retaining clip 16 is designed. Typically, these sections run at an angle of between 60° and 90°, preferably between 75° and 90°, resulting in a retaining clip 16 which is hook-shaped in longitudinal section.
- the second section of the retaining clip 16 is arranged in the use position between the bending beam 3 and a transverse bore in the spring anchor 3a for hanging the restoring element 5.
- the thickness of the second section of the retaining clip 16 is to be selected such that this positioning is possible.
- a bending or edging device comprises at least one upper tool or at least one punch 17, which is arranged movably along the central plane M, in one of the embodiments described so far.
- this stamp 17 as can be seen in the snapshots of FIG. 5 and FIG 3 and the sliding elements 6 rests.
- the sliding elements 6 are still parallel to one another and are in their position furthest outwards, away from the center line M. This also applies after the first, slight deformation of the workpiece W, with the bending cheeks 3 still rotating slightly about the axes B.
- the bending cheeks 3 are made to pivot further and finally form a V-shaped die in the die 1, into which the workpiece W is pressed by the punch 17 and bent along a bending line lying in the center plane M or bevelled.
- the sliding elements 6 With the deformation of Workpiece W, ie with increasing immersion depth of the punch 17, the sliding elements 6 are carried along due to the friction between the workpiece W and the sliding element 6 and slide along on the contact surfaces 4 of the bending cheeks 3 in the direction of the center plane M.
- there is little or no relative movement between the workpiece W and the sliding elements 6 there is little or no relative movement between the workpiece W and the sliding elements 6 .
- the support sections 9 thus also move away from the underside of the widened section of the delimiting element 12 and approach the side of the bending beam 3 and the side of the base body 2 of the die 1 .
- the sliding elements 6 can move in an optimal manner adapted to the deformation of the workpiece W. Disturbances in the movement sequence, blocking of the sliding elements 6 on the bending beams 3 and damage to the workpiece W caused thereby, as well as damage to the device due to broken additional components can thus be reliably avoided.
- an advantageous embodiment provides a device in which at least one sliding element 6 is longer than a single die 1, preferably the same length or longer than the workpiece W.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA50137/2022A AT525933B1 (de) | 2022-03-02 | 2022-03-02 | Matrize für eine Biege- oder Abkantvorrichtung sowie eine Biege- oder Abkantvorrichtung |
| PCT/AT2023/060056 WO2023164735A1 (de) | 2022-03-02 | 2023-03-01 | Matrize für eine biege- oder abkantvorrichtung sowie eine biege- oder abkantvorrichtung |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4486524A1 true EP4486524A1 (de) | 2025-01-08 |
| EP4486524B1 EP4486524B1 (de) | 2026-02-04 |
| EP4486524C0 EP4486524C0 (de) | 2026-02-04 |
Family
ID=85873632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23715001.6A Active EP4486524B1 (de) | 2022-03-02 | 2023-03-01 | Matrize für eine biege- oder abkantvorrichtung sowie eine biege- oder abkantvorrichtung |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250196211A1 (de) |
| EP (1) | EP4486524B1 (de) |
| AT (1) | AT525933B1 (de) |
| WO (1) | WO2023164735A1 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5058041U (de) * | 1973-10-03 | 1975-05-30 | ||
| JPH0314010U (de) | 1990-07-09 | 1991-02-13 | ||
| US5365766A (en) * | 1993-05-18 | 1994-11-22 | Amada Engineering & Service Co., Inc. | Die assembly having means for automatically controlling in the angular orientation of the lower die plate members |
| DE19840563C1 (de) * | 1998-09-05 | 1999-12-09 | Eht Werkzeugmaschinen Gmbh | Vorrichtung zum Gesenkbiegen, zum freien Biegen oder zum Präge-Biegen mit einer eine Kerbe aufweisenden Matrize und mit einem Stempel |
| FR2796320B1 (fr) * | 1999-07-13 | 2001-10-05 | Amada Europ Sa | Presse plieuse a precision amelioree |
| JP6211755B2 (ja) * | 2011-11-04 | 2017-10-11 | 株式会社アマダホールディングス | 板材の加工装置、押圧金型および金型設置体 |
| US10207304B2 (en) * | 2014-03-31 | 2019-02-19 | Tokyo Seimitsu Hatsujo Co., Ltd. | Bending device for metallic plate |
| JP6460695B2 (ja) * | 2014-03-31 | 2019-01-30 | 東京精密発條株式会社 | 金属板の曲げ加工装置 |
-
2022
- 2022-03-02 AT ATA50137/2022A patent/AT525933B1/de active
-
2023
- 2023-03-01 WO PCT/AT2023/060056 patent/WO2023164735A1/de not_active Ceased
- 2023-03-01 EP EP23715001.6A patent/EP4486524B1/de active Active
- 2023-03-01 US US18/842,889 patent/US20250196211A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20250196211A1 (en) | 2025-06-19 |
| EP4486524B1 (de) | 2026-02-04 |
| AT525933A1 (de) | 2023-09-15 |
| WO2023164735A1 (de) | 2023-09-07 |
| EP4486524C0 (de) | 2026-02-04 |
| AT525933B1 (de) | 2024-02-15 |
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