EP2610019A1 - Matrice d'outils pour une unité d'outil - Google Patents

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

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Publication number
EP2610019A1
EP2610019A1 EP11195900.3A EP11195900A EP2610019A1 EP 2610019 A1 EP2610019 A1 EP 2610019A1 EP 11195900 A EP11195900 A EP 11195900A EP 2610019 A1 EP2610019 A1 EP 2610019A1
Authority
EP
European Patent Office
Prior art keywords
tool
cutting edge
face
workpiece
tool body
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Withdrawn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
EP11195900.3A
Other languages
German (de)
English (en)
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 EP11195900.3A priority Critical patent/EP2610019A1/fr
Priority to PCT/EP2012/076157 priority patent/WO2013098154A1/fr
Priority to EP12812606.7A priority patent/EP2797703B1/fr
Publication of EP2610019A1 publication Critical patent/EP2610019A1/fr
Withdrawn legal-status Critical Current

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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 lying therebetween.
  • This waste part or good part falls through the tool die down through the tool opening.
  • one end face of the tool die abuts at a right angle to the tool opening to form a circumferential cutting edge.
  • burr formation occurs during the punching of workpieces at the cutting edge, with the burr projecting downwardly from an underside of the workpiece.
  • Such a projecting burr leads to damage during further processing. Therefore, post-processing to remove the burr is required.
  • the forming cutting burr B is moved into an opening 43 of the workpiece W by forming a groove M offset from the underside of the workpiece towards the center of the workpiece, from which the cutting burr B in turn extends to the underside of the workpiece.
  • Such an embodiment of Workpiece die is also from the JP 63101029 A known.
  • this tool die has the disadvantage of providing an increase relative to the face of the die which is detrimental to 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.
  • a rake angle of the cutting edge can be determined in order to significantly reduce or avoid burr formation.
  • the burr does not protrude downwardly from a bottom surface of the workpiece but is displaced inwardly into the blanking opening in the workpiece.
  • An advantageous embodiment of the invention provides that the cutting edge is formed by a rake face with a predetermined rake angle, which merges fluently in a base of the recess. As a result, flowing transitions can be created, whereby increased punching and / or shear forces are absorbed.
  • This refinement also makes it possible for the rake surface to be able to be formed together with various rake angles, while still providing a smooth transition. Due to the design of the cutting surface with a rake face and a predetermined angle, a force curve can be determined for the cutting edge, which changes when cutting by overbending. As a result, an improved design of the cutting edge on the workpiece can be achieved.
  • 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.
  • 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.
  • FIG. 1 FIG. 2 a schematic sectional view of a punching process with a tool unit known from the prior art
  • FIG. 2 a schematic sectional view of a workpiece with a burr, which according to the punching operation with the tool unit according to FIG. 1 is made,
  • FIG. 3 a perspective view of a tool die according to the invention for a tool unit
  • FIG. 4 a schematic view of a punching operation with the tool according to the invention mold according to FIG. 3 .
  • FIG. 5 a schematic sectional view of the horrinum .
  • FIG. 6a a schematically enlarged detail view D according to FIG. 5 .
  • FIG. 6b a schematically enlarged detail view D of an alternative embodiment according to FIG. 5 .
  • FIG. 7 a schematically enlarged view of a cutting area of one with the horrinum according to FIG. 3 manufactured workpiece
  • FIG. 8 a schematic sectional view of an alternative embodiment of the workpiece die according to the FIGS. 3 to 6 .
  • FIG. 3 perspective view of a tool die 11 according to the invention is shown.
  • This tool die 11 is part of a schematic in FIG. 4 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.
  • FIGS. 5 and 6 To further discuss the inventive design of a cutting edge 33 which abuts a recess 32 which surrounds the tool opening 24, reference is made to the following FIGS. 5 and 6 further referred to.
  • FIG. 6a shows an enlarged detail D according to FIG. 5 ,
  • the cutting edge 33 lies according to this embodiment preferably in the plane of the end face 21 of the tool die 11 and limits the tool opening 24.
  • the recess 32 is formed, which passes away from the tool opening 24 again in the end face 21 .
  • a rake surface 34 is formed, which comprises, for example, a width of the surface according to the illustrated double-headed arrow. This rake surface 34 is disposed at a predetermined rake angle 35 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 comprises a flat surface portion 39 and then opens by means of a curvature 40 in the end face 21.
  • 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 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. 6b is an alternative embodiment to FIG. 6a an enlarged detail D according to FIG. 5 shown.
  • This embodiment deviates from that in FIG. 6a 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.
  • 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. 7 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 the plateau portion 47 of the workpiece 17.
  • the plateau level 36 on the tool body 26 is smaller than the rake face 34 adjacent thereto.
  • FIG. 8 is an alternative embodiment of the recess 32 to the embodiment according to the FIGS. 3 to 6 shown.
  • the recess 32 has a semicircular Cross-section on.
  • 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)
EP11195900.3A 2011-12-28 2011-12-28 Matrice d'outils pour une unité d'outil Withdrawn EP2610019A1 (fr)

Priority Applications (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

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
EP2610019A1 true EP2610019A1 (fr) 2013-07-03

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 After (1)

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

Country Status (2)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2868402A1 (fr) * 2013-11-05 2015-05-06 Cheng-Ping Wang Dispositif de découpage fin
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
US10625325B2 (en) 2014-12-10 2020-04-21 Nippon Steel Corporation Blank, formed article, die assembly, and method for producing blank

Citations (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
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
JPH0947828A (ja) * 1995-08-04 1997-02-18 Sumihiro Gotou 穴あけ用のポンチとダイス
EP0734799B1 (fr) 1995-03-28 2001-06-13 Amada Metrecs Company, Limited Unité de poinçonnage pour opérations de poinçonnage
JP2001182303A (ja) * 1999-12-27 2001-07-06 Hitachi Metals Techno Ltd フロアパネル及びその製造方法
US20090211327A1 (en) * 2008-02-27 2009-08-27 Toyota Jidosha Kabushiki Kaisha Die, tool set, and press-forming method
EP2153915A1 (fr) * 2007-05-22 2010-02-17 Ones CO., LTD. Matrice de perforation de métal en plaque mince et appareil de perforation de métal en plaque mince pourvu de la matrice

Patent Citations (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
EP0734799B1 (fr) 1995-03-28 2001-06-13 Amada Metrecs Company, Limited Unité de poinçonnage pour opérations de poinçonnage
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
JPH0947828A (ja) * 1995-08-04 1997-02-18 Sumihiro Gotou 穴あけ用のポンチとダイス
JP2001182303A (ja) * 1999-12-27 2001-07-06 Hitachi Metals Techno Ltd フロアパネル及びその製造方法
EP2153915A1 (fr) * 2007-05-22 2010-02-17 Ones CO., LTD. Matrice de perforation de métal en plaque mince et appareil de perforation de métal en plaque mince pourvu de la matrice
US20090211327A1 (en) * 2008-02-27 2009-08-27 Toyota Jidosha Kabushiki Kaisha Die, tool set, and press-forming method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2868402A1 (fr) * 2013-11-05 2015-05-06 Cheng-Ping Wang Dispositif de découpage fin
CN104607528A (zh) * 2013-11-05 2015-05-13 王正平 沟槽型精密下料装置
TWI583456B (zh) * 2013-11-05 2017-05-21 王正平 溝槽型精密下料裝置
US9676020B2 (en) 2013-11-05 2017-06-13 Cheng-Ping Wang Trough-form fine blanking device
US10625325B2 (en) 2014-12-10 2020-04-21 Nippon Steel Corporation Blank, formed article, die assembly, and method for producing blank
US11904374B2 (en) 2014-12-10 2024-02-20 Nippon Steel Corporation Blank, formed article, die assembly, and method for producing blank
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

Also Published As

Publication number Publication date
WO2013098154A1 (fr) 2013-07-04
EP2797703B1 (fr) 2016-07-06
EP2797703A1 (fr) 2014-11-05

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