EP2797703B1 - Matrice d'outils pour une unité d'outil - Google Patents

Matrice d'outils pour une unité d'outil Download PDF

Info

Publication number
EP2797703B1
EP2797703B1 EP12812606.7A EP12812606A EP2797703B1 EP 2797703 B1 EP2797703 B1 EP 2797703B1 EP 12812606 A EP12812606 A EP 12812606A EP 2797703 B1 EP2797703 B1 EP 2797703B1
Authority
EP
European Patent Office
Prior art keywords
tool
face
cutting edge
die
recess
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.)
Not-in-force
Application number
EP12812606.7A
Other languages
German (de)
English (en)
Other versions
EP2797703A1 (fr
Inventor
Rainer Hank
Peter Bytow
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.)
Trumpf Werkzeugmaschinen SE and Co KG
Original Assignee
Trumpf Werkzeugmaschinen SE and Co KG
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 Trumpf Werkzeugmaschinen SE and Co KG filed Critical Trumpf Werkzeugmaschinen SE and Co KG
Priority to EP12812606.7A priority Critical patent/EP2797703B1/fr
Publication of EP2797703A1 publication Critical patent/EP2797703A1/fr
Application granted granted Critical
Publication of EP2797703B1 publication Critical patent/EP2797703B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/16—Shoulder or burr prevention, e.g. fine-blanking
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/14—Dies
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/34—Perforating tools; Die holders

Definitions

  • the invention relates to a tool die for a tool unit for shearing and / or punching workpieces, in particular sheets.
  • Conventional tool units for shearing and / or punching workpieces, in particular sheets, comprise a tool die with a tool opening and a punch with a punch.
  • the punching tool is moved toward the tool die, so that the punching punch engages with the tool opening in order to punch out a waste part or a good part from the workpiece carrier therebetween.
  • This waste part or good part falls through the tool die down through the tool opening.
  • Such conventional horrtrizen adjacent an end face of the tool die at a right angle to the tool opening to form a circumferential cutting edge.
  • a tool die for a tool unit for preventing such burr formation in which a cutting edge of the tool die is surrounded by a circumferential recess, which is formed by a rake face, which is inclined relative to a front side, on which the tool body rests, and drops constantly.
  • a connecting line is provided, which leads directly to the front side, whereby a step-shaped return from the edge of the cutting edge opposite the cutting edge is given to the end face.
  • a tool die which adjacent to the tool opening and opposite to the end face of the tool body proposes an increase, which is increased in the direction of the punching tool relative to the end face.
  • the forming cutting burr is moved into an opening of the workpiece, in that a groove formed opposite the underside of the workpiece toward the workpiece center is formed, from which the cutting burr in turn extends to the underside of the workpiece.
  • Such an embodiment of the Werk Swissmatrize is also from the JP 63101029 A .
  • this tool die has the disadvantage that an increase relative to the end face of the die is provided, which is disadvantageous when moving the workpiece and that burr formation still remains, even if it does not protrude from the bottom of the workpiece.
  • the invention has for its object to provide a tool die for a tool unit, by which a further reduction of the burr formation while maintaining a shift of the burr formation in the workpiece opening is made possible to the burr freedom of a cutting edge.
  • the burr formation is reduced or even avoided.
  • the burr does not protrude downwardly from a bottom surface of the workpiece but is displaced inwardly into the blanking opening in the workpiece.
  • the integration of the rake face in the recess has the advantage that a force profile can be determined by the cutting surface with a rake face at a predetermined angle, which changes when cutting by overbending. As a result, an improved design of the cutting edge on the workpiece can be achieved.
  • the depression is semicircular or elliptical.
  • the recesses can be selected accordingly, wherein the geometry of the recess is significantly adapted to the rake face to form a predetermined rake angle of the cutting edge.
  • An alternative embodiment of the invention has an egg-shaped or teardrop-shaped depression, in which preferably the greatest depth is provided away from the cutting edge.
  • the alternative embodiments also allow for reduced burr formation.
  • a plateau level is provided between the cutting edge and the rake face which merges into the recess.
  • the plateau level preferably lies in the plane of the end face of the workpiece body.
  • the cutting edge lies in the plane of the end face of the tool body.
  • a further preferred embodiment of the invention provides that the cutting edge is formed recessed towards the end face of the tool body to the center of the tool body, whereby also a simplified production and a disability-free workpiece movement are possible.
  • the tool opening preferably has a conical surface section adjoining the cutting edge, forming a clearance angle of the cutting edge.
  • the punching or shearing work can be further refined to reduce or prevent the formation of burrs.
  • an adaptation of the rake angle and the clearance angle to the material thickness and / or the material of the material to be machined of the workpiece, in order to achieve an optimization up to the burr freedom.
  • FIG. 1 perspective view of a tool die 11 according to the invention is shown.
  • This tool die 11 is part of a schematic in FIG. 2 illustrated tool unit 12, which comprises a punching tool 14 with a punch 15 and the tool die 11.
  • the punching tool 14 may include a punch guide 16 for guiding the punch 15.
  • the tool die 11 comprises an end face 21 on which an underside 22 of the workpiece 17 rests during machining.
  • a tool opening 24 is provided, which is surrounded by a cutting edge 33.
  • the workpiece 17 is positioned for machining.
  • the punch 18 engages in the tool opening 24.
  • a waste part 30 or a good part is formed, which is brought out via a lower side on the tool die 11.
  • an enlarged recess 28 may be provided on the underside of the tool die 11, which adjoins the tool opening 24.
  • FIG. 4a shows an enlarged detail D according to FIG. 3
  • the cutting edge 33 is according to this embodiment preferably in the plane of the end face 21 of the tool die 11 and limits the tool opening 24. Between the cutting edge 33 and the end face 21 of the tool die 11, the recess 32 is formed, which remote from the tool opening 24 back into the end face 21 passes.
  • a rake surface 34 is formed, which comprises, for example, a width of the surface according to the illustrated double-headed arrow. This rake face 34 is below a predetermined rake angle 35 arranged to form and determine a cutting geometry of the cutting edge 33.
  • a base surface 37 of the recess 32 Adjacent to the clamping surface 34, a base surface 37 of the recess 32 is provided which, for example, comprises a planar surface section 39 and subsequently opens into the front side 21 by means of a curvature or a curved surface 40.
  • recess 32 is designed drop-shaped, wherein the tip portion of the drop is aligned with the cutting edge 33.
  • the recess 32 may also be formed egg-shaped.
  • the base 37 may also be reduced so that only a lowest point is formed.
  • the cutting edge geometry can be determined by a clearance angle 41.
  • the clearance angle is 0 °. This can also include several degrees.
  • a determination of the rake angle 35 and the clearance angle 41 can take place as a function of the material to be processed, thereby defining the wedge angle of the cutting edge 33.
  • FIG. 4b is an alternative embodiment to FIG. 4a an enlarged detail D according to FIG. 3 shown.
  • This embodiment deviates from that in FIG. 4a illustrated embodiment to the effect that between the cutting edge 33 and the rake face 34, a plateau level 36 is provided.
  • This plateau level 36 is preferably located in the plane of the end face 21 of the tool body 26 and may also be arranged offset in relation to the end face 21 of the tool body 26 in the tool opening 24.
  • depression 32 is, for example, teardrop-shaped or egg-shaped or elliptical.
  • a base 37 may be provided in the deepest region, which comprises a flat surface section or the surface section may also be reduced to a lowest point.
  • the depressions 32 according to the FIGS. 4a and 4b may have a consistently curved surface, so that starting from the rake surface 34 via a deepest Point in the recess up to the extension in the front side 41 a step-free recess 32 is formed.
  • This embodiment of the recess 32 which is free of edges, steps or sudden transitions, allows a special reduction in burr formation and can lead to burr freedom.
  • This embodiment according to the invention of the cutting edge 33 with a recess 32 immediately adjacent thereto with respect to the end face 21 makes it possible for a force profile to be changed during the cutting by an overbending of the cutting edge 33.
  • This cutting edge 42 of the workpiece opening 43 of the workpiece 17 comprises a considerably reduced burr formation, in which a burr 44 is displaced towards a bottom side 45 of the workpiece 17 in the direction of the workpiece center or comprises a ridge reduction 45.
  • the ridge 44 does not protrude from the underside 55 of the workpiece 17.
  • the ridge 44 includes only a minimum ridge width 46 bounded by a plateau portion 47 defined by a trough entrance angle 48.
  • This sectional view according to FIG. 5 shows that adjoining a Kanteneinzugsbreite 49 a smooth cutting height 50 and this in turn is offset back a fracture surface height 52 is given, which ends by the formation of the ridge 44.
  • the ridge tip relative to the bottom 55 as well as against the blade cutting height 50 is displaced in each case inward, so that there is no impairment in the further processing at a minimally remaining ridge 44 is given.
  • the plateau level 36 of the tool die 11 defines a plateau portion 47 of the workpiece 17.
  • the rake angle 35 of the rake surface 34 of the tool die 11 determines the trough entrance angle 48 of the ridge 44 with respect to a portion between the bottom 55 and in the plateau portion 47 of the workpiece 17.
  • the plateau level 36 on the tool body 26 is smaller than the clamping surface 34 adjacent thereto.
  • FIG. 6 is an alternative embodiment of the recess 32 to the embodiment according to the FIGS. 1 to 4 shown.
  • the recess 32 has a semicircular cross-section.
  • a plateau level 36 may be provided between the cutting edge 33 of the rake face 34.
  • the geometry of the recess 32 is determined in a region adjacent to the cutting edge 33 by the width and the angular arrangement of the rake face 34. Subsequent thereto, that is to say in the further course with respect to the base surface 37, the recess 32 can comprise different contours.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Punching Or Piercing (AREA)

Claims (8)

  1. Matrice-outil pour une unité-outil (12) destinée au découpage et/ou au cisaillement de pièces à usiner (17), en particulier de tôles, avec un corps d'outil (26) qui comprend une ouverture d'outil (24) traversant le corps d'outil (26) et dans laquelle s'engage un poinçon de découpe (15) d'un outil de découpe (14), et avec une face frontale (21) qui est prévue sur le corps d'outil (26) et qui sert de support à une pièce à usiner (17), et avec une arête de coupe (33) qui entoure l'ouverture d'outil (24), l'arête de coupe (33) étant entourée d'un creux circonférentiel (32) qui se transforme en la face frontale (21) et l'arête de coupe (33) étant formée par une surface de dégagement (34) qui est inclinée selon un angle de dégagement (35) par rapport à la face frontale (21), caractérisée en ce que la surface de dégagement (34) se transforme insensiblement en une surface de base (37) ou en un point le plus bas du creux (32) et en ce que le creux (32) s'étend à partir de là jusqu'à la face frontale en formant une surface incurvée (40).
  2. Matrice-outil selon la revendication 1, caractérisée en ce que le creux (32) présente une section semi-circulaire ou elliptique.
  3. Matrice-outil selon la revendication 1, caractérisée en ce que le creux (32) comprend un creux de forme ovoïde ou en forme de goutte dont la profondeur la plus grande est prévue de préférence loin de l'arête de coupe (33).
  4. Matrice-outil selon la revendication 1, caractérisée en ce qu'un palier (36) est prévu entre l'arête de coupe (33) et la surface de dégagement (34).
  5. Matrice-outil selon la revendication 4, caractérisée en ce que le palier (36) se situe dans le plan de la face frontale (21) du corps d'outil (26) ou se situe en retrait par rapport au plan de la face frontale (21) du corps d'outil (26), et ce vers le centre dudit corps d'outil (26).
  6. Matrice-outil selon la revendication 1, caractérisée en ce que l'arête de coupe (33) se situe dans le plan de la face frontale (21) du corps d'outil (26).
  7. Matrice-outil selon l'une quelconque des revendications 1 à 5, caractérisée en ce que l'arête de coupe (33) est disposée, par rapport à la face frontale (21) du corps d'outil (26), à un niveau plus bas vers le centre dudit corps d'outil (26).
  8. Matrice-outil selon l'une quelconque des revendications précédentes, caractérisée en ce que l'ouverture d'outil (24) présente une partie de surface conique, contiguë à l'arête de coupe (33) pour former un angle de dépouille (41).
EP12812606.7A 2011-12-28 2012-12-19 Matrice d'outils pour une unité d'outil Not-in-force EP2797703B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12812606.7A EP2797703B1 (fr) 2011-12-28 2012-12-19 Matrice d'outils pour une unité d'outil

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11195900.3A EP2610019A1 (fr) 2011-12-28 2011-12-28 Matrice d'outils pour une unité d'outil
PCT/EP2012/076157 WO2013098154A1 (fr) 2011-12-28 2012-12-19 Matrice-outil pour une unité outil
EP12812606.7A EP2797703B1 (fr) 2011-12-28 2012-12-19 Matrice d'outils pour une unité d'outil

Publications (2)

Publication Number Publication Date
EP2797703A1 EP2797703A1 (fr) 2014-11-05
EP2797703B1 true EP2797703B1 (fr) 2016-07-06

Family

ID=47520952

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11195900.3A Withdrawn EP2610019A1 (fr) 2011-12-28 2011-12-28 Matrice d'outils pour une unité d'outil
EP12812606.7A Not-in-force EP2797703B1 (fr) 2011-12-28 2012-12-19 Matrice d'outils pour une unité d'outil

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP11195900.3A Withdrawn EP2610019A1 (fr) 2011-12-28 2011-12-28 Matrice d'outils pour une unité d'outil

Country Status (2)

Country Link
EP (2) EP2610019A1 (fr)
WO (1) WO2013098154A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240238862A1 (en) * 2014-12-10 2024-07-18 Nippon Steel Corporation Blank, formed article, die assembly, and method for producing blank

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI583456B (zh) * 2013-11-05 2017-05-21 王正平 溝槽型精密下料裝置
CN107413952A (zh) * 2017-07-05 2017-12-01 芜湖市成冉精密模具有限公司 一种下料卷圆一体结构

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2212886A (en) * 1938-07-01 1940-08-27 Fred F Ruland Cutting tool
JPS63101029A (ja) 1986-10-17 1988-05-06 Takiron Co Ltd パンチングプレ−トの製造法
JPH03275224A (ja) * 1990-03-23 1991-12-05 Hitachi Cable Ltd 順送金型によるリードフレームの打抜き加工方法
JPH0569055A (ja) * 1991-09-09 1993-03-23 Nissan Motor Co Ltd 板状ワークのバリ低減切断装置
JPH08267158A (ja) 1995-03-28 1996-10-15 Amada Metrecs Co Ltd ダイ金型
JPH08332529A (ja) * 1995-06-09 1996-12-17 Mitsubishi Motors Corp ピアス孔加工用金型とピアス孔の加工方法
JP2909714B2 (ja) * 1995-08-04 1999-06-23 純宏 後藤 穴あけ用のダイス
JP4287562B2 (ja) * 1999-12-27 2009-07-01 日立機材株式会社 フロアパネル及びその製造方法
JP5141093B2 (ja) * 2007-05-22 2013-02-13 株式会社ワンズ 薄板金属孔明け用のダイス及びこのダイスを具備した薄板金属用孔明け装置
JP2009202272A (ja) * 2008-02-27 2009-09-10 Toyota Motor Corp ダイス、工具セット、及びプレス加工方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240238862A1 (en) * 2014-12-10 2024-07-18 Nippon Steel Corporation Blank, formed article, die assembly, and method for producing blank

Also Published As

Publication number Publication date
EP2610019A1 (fr) 2013-07-03
EP2797703A1 (fr) 2014-11-05
WO2013098154A1 (fr) 2013-07-04

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