EP2036631A1 - Procédé et dispositif destinés à la fabrication de pièces découpées dotées de surfaces de fonction agrandies - Google Patents

Procédé et dispositif destinés à la fabrication de pièces découpées dotées de surfaces de fonction agrandies Download PDF

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Publication number
EP2036631A1
EP2036631A1 EP07018139A EP07018139A EP2036631A1 EP 2036631 A1 EP2036631 A1 EP 2036631A1 EP 07018139 A EP07018139 A EP 07018139A EP 07018139 A EP07018139 A EP 07018139A EP 2036631 A1 EP2036631 A1 EP 2036631A1
Authority
EP
European Patent Office
Prior art keywords
cutting
ejector
preforming
tape strip
guide 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
EP07018139A
Other languages
German (de)
English (en)
Other versions
EP2036631B1 (fr
Inventor
Andreas Marti
Ulrich Dipl.-Ing. Schlatter
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.)
Feintool Intellectual Property AG
Original Assignee
Feintool Intellectual Property AG
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 Feintool Intellectual Property AG filed Critical Feintool Intellectual Property AG
Priority to DE502007005770T priority Critical patent/DE502007005770D1/de
Priority to AT07018139T priority patent/ATE489181T1/de
Priority to EP07018139A priority patent/EP2036631B1/fr
Priority to MX2008011613A priority patent/MX2008011613A/es
Priority to CA2639455A priority patent/CA2639455C/fr
Priority to JP2008234889A priority patent/JP2009066662A/ja
Priority to KR20080090304A priority patent/KR101488019B1/ko
Priority to US12/283,705 priority patent/US9027379B2/en
Priority to CN2008102135830A priority patent/CN101386045B/zh
Publication of EP2036631A1 publication Critical patent/EP2036631A1/fr
Application granted granted Critical
Publication of EP2036631B1 publication Critical patent/EP2036631B1/fr
Active 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
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor

Definitions

  • the invention relates to a method for producing a stamped part with an enlarged functional surface, in particular fine cutting a workpiece from a tape strip, in which the tape strip between a top of a cutting punch, a guide plate for the cutting punch, arranged on the guide plate ring teeth and an ejector shell and a clamped from the cutting plate and ejector existing lower part when closing and the ring point is pressed into the tape strip.
  • the invention further relates to devices for producing a stamped part with an enlarged functional surface, in particular fine cutting a workpiece from a strip of tape, with a two-part tool, the At least one cutting punch, a guide plate for the cutting punch, arranged on the guide plate ring prong, a pusher, a cutting plate and an ejector, wherein the tape strip between the guide plate and cutting plate is clamped and the ring prong is pressed into the tape strip.
  • Typical features of fine cut parts are the edge indent and the cutting edge.
  • the feeder which increases with decreasing the corner radius and increasing sheet thickness.
  • the insertion depth can be approx. 30% and the feed width is about 40% of the sheet thickness or more (see DIN 3345, fineblanking, Aug. 1980).
  • the feeder is thus dependent on material thickness and quality, so that its control is limited and often a limitation of the part function, For example, by a lack of sharp edges of the corners in teeth or by the induced change in the functional length of the parts, brings with it.
  • the punch pull therefore reduces the parting function and forces the manufacturer to use a thicker stock.
  • the workpiece is machined in a single-stage arrangement in at least two successive successive successive step sequences in different cutting directions, in a first cutting operation in the vertical direction cut a tailored to the workpiece geometry semi-finished product with a small indentation and cut in at least one other cutting operation in the opposite direction the part becomes.
  • the entry of the first step is to be replenished at least in the corner area.
  • predominantly the projecting punching burr is avoided.
  • the feeder is ultimately not eliminated and material volume is displaced along the cutting line, which is accompanied by an increased risk of cracking.
  • the present invention seeks to avoid the edge feed targeted by generating a volume corresponding intake within the part geometry while maintaining the functional surfaces of thinner fine cutting parts while saving material, without the material is moved along the cutting line ,
  • the solution according to the invention is characterized in that it is possible for the first time to economically apply the fine blanking process to parts, for example toothed parts of medium and greater thickness with sharp edges without post-processing and material displacement along the cutting line.
  • the process parameters for preforming are determined by a virtual forming simulation as a function of the material type, shape and geometry of the workpiece. This leads to a fast practical design of the preform elements, in particular the determination of the preform angles on the preform elements.
  • the process parameters for the preforming can be iteratively determined by measuring on actually produced fine-cut parts, without departing from the invention.
  • the method according to the invention can be used variably. Thus preforming can be carried out in a separate preliminary stage within a tool as a follow-up cut. However, it is also feasible without problems in the complete section, if the ejector is also used as a preform element, the complete section by the method according to the invention is particularly advantageous for thinner parts applicable.
  • the inventive method thus covers the fine blanking of parts in a wide dimensional range, for example, parts up to average thicknesses and smaller to medium Dimensions in the complete section and parts up to large thicknesses and dimensions in the subsequent cut, from.
  • the devices according to the invention have a simple and robust construction.
  • the cutting stage upstream punch for negative preforming adapted to the expected edge feed volume of material on the feed side is provided, the die has on its active side a contour or a preforming angle, or which corresponds to the geometry of the expected edge indent plus an addition.
  • At least one ejector which counteracts the cutting direction and is assigned to the cutting stage, is provided for negative preforming of a material volume adapted to the expected edge feed on the feed side, wherein the ejector has on its active side a contour or a preform angle which or of the geometry the expected edge indentation plus an addition is adjusted, wherein the ejector supports the preformed area during cutting.
  • the preforming angles for the embossing punch in the case of a subsequent cut and the ejector in the case of the complete cut are approximately between 20 ° and 40 °.
  • Fig. 1 a schematic representation of the device according to the invention with a separate precursor for preforming the Einzugsgeometrie when clamped between the upper and lower part tape strip in the closed tool
  • Fig. 2 a simplified schematic representation of the inventive device according to Fig. 1 on the cut tape strip in the closed tool
  • Fig. 3 an enlarged view of the stamping die with preforming angle
  • Fig. 4a and 4b a schematic representation of the geometry of the edge feed of a prior art and after the preforming according to the invention
  • Fig. 5 a schematic representation of the vote between die and the preformed portion of the tape strip
  • Fig. 6 an example of a produced by the process according to the invention gear part with and without preforming.
  • the Fig. 1 shows the basic structure of the device according to the invention, comprising an upper part 1 and a lower part 2.
  • the upper part 1 includes a Ring sprocket 3 having guide plate 4, a cutting punch 5, which is guided in the guide plate 4, and a Ausstosser 6.
  • the lower part 3 is formed of a cutting plate 7 and an ejector 9.
  • the strip strip 10 of alloyed stainless steel with a thickness of 4, 5 mm, from the method according to the invention, a gear part 11 with teeth 12 to be manufactured is clamped according to the shown positional condition of the tool between the guide plate 4 and cutting plate 7 and the ring teeth 3 has already penetrated into the tape strip 10, whereby the material due the acting ring-tooth force is prevented from re-flowing during cutting.
  • the precursor is formed by a guided in the lower part 2 as a preforming element V embossing die 13, which has on its active side 14 previously determined by a virtual forming simulation preforming angle ⁇ and is provided with a contour 15, the geometry of the expected collection with an empirical values resulting addition corresponds.
  • the pre-forming of the clamped between upper and part 1 and 2 tape strip is carried out by the stamper 13, the effective direction is opposite to the cutting direction SR of the cutting punch 5.
  • the embossing punch 13 deforms during its advancing movement the tape strip 10 so far that moves the contour 15 of the active side 14 of the embossing stamp with its preforming angle ⁇ in the material of the tape strip by an adapted to the geometry of the feeder amount and a deformation of the tape strip 10 on the feed side which corresponds to the volume of the expected intake.
  • Fig. 3 shows an example of a stamping die 13 with a corresponding contour 15 on its active side. It can be seen that this contour corresponds exactly to the geometry of the feeder.
  • the process parameters for preforming such as the geometry, i. the pull-in height and pull-in width, and the material volume, i. Feeding volume is determined by a virtual forming simulation, depending on the material type, shape and geometry of the workpiece, in which the flow of material in the forming process is shown, strains and reference stresses are analyzed to determine whether the deformation can be made and the loads borne by the tool elements.
  • the process parameters for the preforming can also be determined on the real fineblanking part by individual measurement of the pull-in height, pull-in width and determination of the feed volume. This requires a series of tests and their evaluation in order to be able to interpret the embossing die 13 accordingly on this basis.
  • the ejector 9 as a preforming element for preforming the clamped tape strip in accordance with the expected geometry of the edge feed.
  • FIG. 4a shows the forming indentation on a fine blank, which made without application of the invention has been.
  • this entry E is defined by the edge retraction height h and edge retraction width b and the resulting burr by cutting burr height and cutting burr width. It is certain that the burr volume is many times smaller than the catch volume V. So to speak, volume has been lost. On the one hand, this volume migrates significantly behind the outer contour of the part and, on the other hand, a small amount is lost due to the solidification of the material.
  • the dimensions and the volume V of the expected edge indentation are determined. This can be done as described in section [0028] either by a forming simulation or by a direct measurement on the real part.
  • Fig. 4b schematically illustrates that the thus determined edge retraction E is imaged in the opposite direction in mirrored form on the feed side. This is done by a corresponding preforming with the embossing punch 13, which is provided with an adapted to the geometric conditions of the expected edge retraction E contour 15 with preforming angle ⁇ . From the Fig. 5 is the particularly good match between the Contour 15 on the die 13 and the preformed portion of the tape strip 10 can be seen.
  • Fig. 6 shows the example of a manufactured by the process according to the invention gear 11, in which a measured at the tooth tip reduction of the insertion depth was achieved by 36%.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Punching Or Piercing (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Forging (AREA)
EP07018139A 2007-09-14 2007-09-14 Procédé et dispositif destinés à la fabrication de pièces découpées dotées de surfaces de fonction agrandies Active EP2036631B1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
DE502007005770T DE502007005770D1 (de) 2007-09-14 2007-09-14 Verfahren und Vorrichtung zum Herstellen von Stanzteilen mit vergrösserter Funktionsfläche
AT07018139T ATE489181T1 (de) 2007-09-14 2007-09-14 Verfahren und vorrichtung zum herstellen von stanzteilen mit vergrösserter funktionsfläche
EP07018139A EP2036631B1 (fr) 2007-09-14 2007-09-14 Procédé et dispositif destinés à la fabrication de pièces découpées dotées de surfaces de fonction agrandies
MX2008011613A MX2008011613A (es) 2007-09-14 2008-09-10 Metodo y dispositivo para producir piezas estampadas con superficie funcional agrandada.
CA2639455A CA2639455C (fr) 2007-09-14 2008-09-11 Procede et dispositif de realisation d'un poinconnage avec surface fonctionnelle agrandie
JP2008234889A JP2009066662A (ja) 2007-09-14 2008-09-12 拡大した機能面を有する打ち抜き部品を製造するための方法と装置
KR20080090304A KR101488019B1 (ko) 2007-09-14 2008-09-12 확대된 작용면을 가지는 스탬핑 제조를 위한 장치 및 방법
US12/283,705 US9027379B2 (en) 2007-09-14 2008-09-15 Method and device for the production of a stamping with enlarged functional surface
CN2008102135830A CN101386045B (zh) 2007-09-14 2008-09-16 用于制造具有增大的功能面的冲压件的方法和装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07018139A EP2036631B1 (fr) 2007-09-14 2007-09-14 Procédé et dispositif destinés à la fabrication de pièces découpées dotées de surfaces de fonction agrandies

Publications (2)

Publication Number Publication Date
EP2036631A1 true EP2036631A1 (fr) 2009-03-18
EP2036631B1 EP2036631B1 (fr) 2010-11-24

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EP07018139A Active EP2036631B1 (fr) 2007-09-14 2007-09-14 Procédé et dispositif destinés à la fabrication de pièces découpées dotées de surfaces de fonction agrandies

Country Status (9)

Country Link
US (1) US9027379B2 (fr)
EP (1) EP2036631B1 (fr)
JP (1) JP2009066662A (fr)
KR (1) KR101488019B1 (fr)
CN (1) CN101386045B (fr)
AT (1) ATE489181T1 (fr)
CA (1) CA2639455C (fr)
DE (1) DE502007005770D1 (fr)
MX (1) MX2008011613A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2420977A1 (fr) * 2010-08-17 2012-02-22 Feintool Intellectual Property AG Procédé de prévision ou de détermination de l'introduction dans une pièce découpée
EP2508274A1 (fr) * 2011-04-05 2012-10-10 Feintool Intellectual Property AG Procédé et dispositif d'augmentation de la surface de portée d'une pièce obtenue par découpage fin ayant une dent, partie dentée ou analogue
CN102806264A (zh) * 2012-08-09 2012-12-05 河南星光机械制造有限公司 一种双向精冲模具及双向精冲零件加工方法
US8826540B2 (en) 2010-02-10 2014-09-09 Feintool Intellectual Property Ag Method and device for influencing the cut and functional face on fine-blanked finished parts
EP2868402A1 (fr) * 2013-11-05 2015-05-06 Cheng-Ping Wang Dispositif de découpage fin
CN105290219A (zh) * 2015-10-29 2016-02-03 湖北三江航天红阳机电有限公司 一种拉伸成形冲孔复合模具
CN105396951A (zh) * 2015-12-14 2016-03-16 苏州源硕精密模具有限公司 一种倒装式落料冲孔复合模
DE102009029756B4 (de) * 2009-06-18 2018-02-01 Atf Auer Teilefertigung Gmbh Verfahren zur Herstellung von Stanzteilen, insbesondere von Synchronringen, Kupplungskörpern oder Kupplungsscheiben

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2400763B1 (es) * 2010-07-01 2014-04-28 Yield Force, S.L. Un utillaje de estampacion de precision
JP5754324B2 (ja) * 2011-09-24 2015-07-29 アイシン精機株式会社 回転電機のロータおよびロータの形成方法
CN104338823B (zh) * 2013-08-07 2016-04-27 江苏博俊工业科技股份有限公司 厚钢板局部精冲齿形产品用冲压连续模
JP5954371B2 (ja) * 2014-08-05 2016-07-20 三菱マテリアル株式会社 パワーモジュール用基板及びその製造方法
CN104552461A (zh) * 2014-12-23 2015-04-29 苏州源德福科技有限公司 一种可调模切厚度的模切刀
WO2017174215A1 (fr) * 2016-04-05 2017-10-12 Robert Bosch Gmbh Procédé pour le découpage à la presse de pièces métalliques
CN112642919B (zh) * 2020-12-29 2023-01-17 常州工利精机科技有限公司 电机叠片铁芯的加工方法

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US2508758A (en) * 1946-09-20 1950-05-23 Hayes Ind Inc Method of punching out metal
CH665367A5 (en) * 1984-09-17 1988-05-13 Feintool Ag Eliminating material burr at edges of press-cut component - by at least one corrective cutting step on step-wise moving metal strip
EP0418779A1 (fr) * 1989-09-20 1991-03-27 Feintool International Holding Méthode pour manufacture de pièces d'oeuvre par découpage, en particulier dans un outil à contre découpage à précision
US5163223A (en) * 1991-08-21 1992-11-17 Custom Stamping, Inc. Process for making an electrical connector pin having fully rounded contact surfaces
WO2002081116A1 (fr) * 2001-04-06 2002-10-17 Adval Tech Holding Ag Procede pour decouper des toles sans bavures
US20050050935A1 (en) * 2002-11-20 2005-03-10 Hideyuki Miyahara Shearing method for thin plate
EP1815922A1 (fr) * 2006-02-03 2007-08-08 Feintool Intellectual Property AG Procédé et outil pour le découpage fin de pièces ayant des petits rayons de coin et une profondeur fortement reduite en un seule étape

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JP2669035B2 (ja) * 1989-03-16 1997-10-27 富士通株式会社 プレス打抜き加工方法
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DE19738636A1 (de) 1996-07-25 1999-03-11 Zoltan Berger Verfahren zum Herstellen eines Verzehrgutes
JP3497122B2 (ja) * 2000-08-01 2004-02-16 株式会社ヤマナカゴーキン 打抜き装置
CN100333852C (zh) * 2002-06-06 2007-08-29 武汉华夏精冲技术有限公司 圆形、扇形齿轮精密冲压成形加工方法
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Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508758A (en) * 1946-09-20 1950-05-23 Hayes Ind Inc Method of punching out metal
CH665367A5 (en) * 1984-09-17 1988-05-13 Feintool Ag Eliminating material burr at edges of press-cut component - by at least one corrective cutting step on step-wise moving metal strip
EP0418779A1 (fr) * 1989-09-20 1991-03-27 Feintool International Holding Méthode pour manufacture de pièces d'oeuvre par découpage, en particulier dans un outil à contre découpage à précision
US5163223A (en) * 1991-08-21 1992-11-17 Custom Stamping, Inc. Process for making an electrical connector pin having fully rounded contact surfaces
WO2002081116A1 (fr) * 2001-04-06 2002-10-17 Adval Tech Holding Ag Procede pour decouper des toles sans bavures
US20050050935A1 (en) * 2002-11-20 2005-03-10 Hideyuki Miyahara Shearing method for thin plate
EP1815922A1 (fr) * 2006-02-03 2007-08-08 Feintool Intellectual Property AG Procédé et outil pour le découpage fin de pièces ayant des petits rayons de coin et une profondeur fortement reduite en un seule étape

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009029756B4 (de) * 2009-06-18 2018-02-01 Atf Auer Teilefertigung Gmbh Verfahren zur Herstellung von Stanzteilen, insbesondere von Synchronringen, Kupplungskörpern oder Kupplungsscheiben
US8826540B2 (en) 2010-02-10 2014-09-09 Feintool Intellectual Property Ag Method and device for influencing the cut and functional face on fine-blanked finished parts
EP2420977A1 (fr) * 2010-08-17 2012-02-22 Feintool Intellectual Property AG Procédé de prévision ou de détermination de l'introduction dans une pièce découpée
EP2508274A1 (fr) * 2011-04-05 2012-10-10 Feintool Intellectual Property AG Procédé et dispositif d'augmentation de la surface de portée d'une pièce obtenue par découpage fin ayant une dent, partie dentée ou analogue
CN102806264A (zh) * 2012-08-09 2012-12-05 河南星光机械制造有限公司 一种双向精冲模具及双向精冲零件加工方法
CN102806264B (zh) * 2012-08-09 2015-01-14 河南星光机械制造有限公司 一种双向精冲模具及双向精冲零件加工方法
EP2868402A1 (fr) * 2013-11-05 2015-05-06 Cheng-Ping Wang Dispositif de découpage fin
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
CN105290219A (zh) * 2015-10-29 2016-02-03 湖北三江航天红阳机电有限公司 一种拉伸成形冲孔复合模具
CN105396951A (zh) * 2015-12-14 2016-03-16 苏州源硕精密模具有限公司 一种倒装式落料冲孔复合模

Also Published As

Publication number Publication date
US9027379B2 (en) 2015-05-12
CN101386045B (zh) 2012-11-21
ATE489181T1 (de) 2010-12-15
EP2036631B1 (fr) 2010-11-24
KR20090028465A (ko) 2009-03-18
CA2639455C (fr) 2015-12-29
DE502007005770D1 (de) 2011-01-05
CA2639455A1 (fr) 2009-03-14
KR101488019B1 (ko) 2015-01-29
US20090173129A1 (en) 2009-07-09
JP2009066662A (ja) 2009-04-02
CN101386045A (zh) 2009-03-18
MX2008011613A (es) 2009-04-15

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