US20070157696A1 - Fine-blanking device - Google Patents

Fine-blanking device Download PDF

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Publication number
US20070157696A1
US20070157696A1 US10/581,517 US58151704A US2007157696A1 US 20070157696 A1 US20070157696 A1 US 20070157696A1 US 58151704 A US58151704 A US 58151704A US 2007157696 A1 US2007157696 A1 US 2007157696A1
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US
United States
Prior art keywords
blanking
fine
strip
transverse
transverse elements
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.)
Abandoned
Application number
US10/581,517
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English (en)
Inventor
Lucas Henricus Prinsen
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of US20070157696A1 publication Critical patent/US20070157696A1/en
Abandoned 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
    • B21D28/06—Making more than one part out of the same blank; Scrapless working
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G5/00—V-belts, i.e. belts of tapered cross-section
    • F16G5/16—V-belts, i.e. belts of tapered cross-section consisting of several parts

Definitions

  • the present invention relates to a fine-blanking device for the fine blanking of transverse elements for a type of drive belt known as a push belt for a continuously variable transmission.
  • the push belt which is known per se, is provided with at least one endless pulling element, which generally comprises a set of nested flat metal rings, the transverse elements being incorporated in the push belt in such a manner that they can move along the periphery of the pulling element.
  • a push belt of this type is generally known, for example from European Patent publication EP-A-0278545 in the name of the present Applicant which, however, describes a conventional blanking process and device in which the products are blanked without a blank holder and with a relatively large amount of play between die and cutter and in which the product drops directly out of the die after it has been cut out by the cutter, and in which the strip of starting material is provided with centring holes through which, during blanking, centring pins of the blanking device are guided in order to correctly orient the strip and the cutter with respect to one another.
  • this blanking method has proven insufficiently appropriate for the blanking of high-quality transverse elements with very accurate dimensions for the push belt.
  • the known fine-blanking process makes use of a relatively narrow strip of starting material with a width of approximately one and a half times or at least less than double the height dimension of a transverse element, which starting material is therefore for the most part used to obtain transverse elements.
  • This is realized with the aid of four strip-related blanking positions for the transverse elements, with the relatively wide radially innermost parts of a transverse element being located at a side of the strip in each blanking position and the relatively narrow, radially outermost parts, which taper to a point, i.e. the head parts of the respective transverse elements, located in the middle of the strip in each blanking position.
  • the blanking positions are in this case located alternately on opposite sides of the strip, at a certain distance from one another in the longitudinal direction thereof, which distance approximately corresponds to half the width dimension of the transverse elements. Therefore, two successive blanking positions are located diagonally opposite one another, as seen in the longitudinal direction of the strip.
  • This arrangement has the significant advantage that maximum utilization of the starting material is achieved by making use of the peripheral shape of the transverse elements.
  • the known method achieves a relatively high capacity for the fine-blanking device, on account of the fact that four transverse elements are punched out simultaneously for each so-called blanking stroke at the location of the four blanking positions. After each blanking stroke, the strip is advanced through the fine-blanking device, in its longitudinal direction, through a distance of slightly more than double the width dimension of the transverse elements.
  • a comparable device but with just two blanking positions located diagonally opposite one another and with a relatively wide strip, or at least a strip which is a good deal wider than double, at least approximately triple, the height dimension of the transverse elements, is also known from the European patent publication EP-A-1128088.
  • This publication also illustrates the problem, which is likewise known, that to maximize the quality of the blanked product, the position of the strip in the fine-blanking device, in particular with respect to the cutters thereof, has to be determined and fixed with a high level of accuracy.
  • the fine-blanking device uses a strip of starting material with a width of approximately or at least only slightly greater than double the height dimension of the transverse elements that are to be formed. Furthermore, the device comprises at least two blanking positions which are located in pairs in mirror-image form with respect to one another in the transverse direction of the strip, i.e. the point of the respective head parts of the two transverse elements that are to be formed at the location of these blanking positions face one another, with the points located at a short distance from one another in the vicinity of the centre of the strip.
  • FIG. 1 diagrammatically depicts, in the form of a cross section, a fine-blanking process and the tool parts involved;
  • FIG. 2 shows the known method on the basis of a plan view of a strip of material which is to be blanked
  • FIG. 3 shows the method according to the invention in a similar view to FIG. 2 .
  • FIG. 1 diagrammatically depicts a so-called fine-blanking process and device used to cut a blanked product 51 that is to be formed, in this case the transverse element 51 for a push belt for a continuously variable transmission, out of starting material 52 in strip form.
  • the known fine-blanking device comprises a die 45 and a guide plate 35 , between which the strip of starting material 52 is clamped.
  • the device also comprises a cutter 30 and, in line with the latter, a support member, known as the blank holder 40 .
  • the periphery of both the cutter 30 and the blank holder 40 substantially corresponds to the periphery of the transverse elements 51 that are to be blanked.
  • a movement of the cutter 30 with respect to the die 45 as indicated by arrow P causes the stamped product 51 to be cut out, with the blank holder 40 exerting a counter-force but at the same time also following the movement of the cutter 30 .
  • a free space or play is defined perpendicular to the outer periphery of the cutter 30 and the inner periphery of the die 45 .
  • the degree of play is generally relatively small, and in the case of the fine-blanking process is approximately 1 to 5 percent of a thickness dimension of the starting material 52 .
  • FIG. 2 illustrates the known set-up of the fine-blanking device for transverse elements 51 on the basis of the strip of starting material 52 .
  • the dark areas 10 use the contours of the transverse element 51 that is to be formed to indicate four blanking positions 10 where the blanked products 51 are formed simultaneously in one so-called blanking stroke.
  • the outlined contours 11 indicate positions where transverse elements 51 have already been blanked out of the strip 52 .
  • the strip 52 is guided through the fine-blanking device in its longitudinal direction as indicated by arrow M. After each blanking stroke, the strip 52 is conveyed two blanking positions 10 through the device, in the direction indicated by arrow M, which virtually corresponds to double the width dimension of the transverse elements 51 .
  • the front blanking position 10 i.e. the blanking position located furthest to the right in the figure
  • the blanking position 10 immediately behind the front blanking position is surrounded by three contours 11 which have been cut out
  • the following blanking position 10 is surrounded by one contour which has already been cut out
  • the rear blanking position 10 located furthest to the left, does not adjoin a contour 11 which has already been cut out but rather is completely surrounded by the starting material 52 .
  • the blanked products 51 produced by the four different blanking positions 10 may differ from one another at least slightly in particular with regard to their dimensional accuracy, which is probably caused by the above-described difference in the material surrounding the respective blanking positions 10 .
  • the blanked products 51 are then assembled with one another to form an end product, as is the case for the transverse elements 51 in the push belt, relatively minor deviations in the dimensional accuracy of this nature may nevertheless give rise to considerable deviations in the end product.
  • the cutters 30 and/or the dies 45 for each of the four blanking positions 10 may wear in different ways, and consequently they need to be replaced at different times or are replaced simultaneously at the time when the tool part 30 , 45 which wears most quickly wears out.
  • FIG. 3 illustrates the set-up of the fine-blanking device according to the present invention.
  • two blanking positions 10 are arranged opposite one another in pairs in the transverse direction of the strip 52 , with arrowhead-shaped head parts 8 of the two transverse elements 51 that are to be formed at the location of these blanking positions 10 facing towards one another.
  • the two transverse forces associated with the separate blanking positions 10 compensate for one another, or at least the dimensional accuracy of the blanked product 51 is improved.
  • the cutters 30 of the two blanking positions 10 may as a result be placed relatively close together, so that in the fine-blanking device according to the invention it is advantageously possible to use a strip of starting material 52 with a width of approximately or at least only slightly greater than double the height dimension of the transverse elements 51 that are to be formed.
  • a further, additional advantage of the fine-blanking device according to the invention is that the above-described difference in the material surrounding the respective blanking positions 10 does not occur, but rather the material surrounding the blanking positions is correspondingly and substantially symmetrical for both blanking positions 10 . This fact also has a positive influence on the dimensional accuracy of the respective blanked products 51 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Punching Or Piercing (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US10/581,517 2003-12-05 2004-11-30 Fine-blanking device Abandoned US20070157696A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1024957A NL1024957C2 (nl) 2003-12-05 2003-12-05 Fijnstansinrichting.
NL1024957 2003-12-05
PCT/NL2004/000829 WO2005054709A1 (en) 2003-12-05 2004-11-30 Fine-blanking device

Publications (1)

Publication Number Publication Date
US20070157696A1 true US20070157696A1 (en) 2007-07-12

Family

ID=34651562

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/581,517 Abandoned US20070157696A1 (en) 2003-12-05 2004-11-30 Fine-blanking device

Country Status (6)

Country Link
US (1) US20070157696A1 (ja)
EP (1) EP1692414B1 (ja)
JP (1) JP4809776B2 (ja)
AT (1) ATE519966T1 (ja)
NL (1) NL1024957C2 (ja)
WO (1) WO2005054709A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113260469A (zh) * 2018-12-24 2021-08-13 罗伯特·博世有限公司 精密冲裁工艺

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1030702C2 (nl) * 2005-12-19 2007-06-20 Bosch Gmbh Robert Werkwijze voor het vervaardigen van een dwarselement dat bestemd is om deel uit te maken van een duwband voor een continu variabele transmissie.
JP5391636B2 (ja) * 2008-10-08 2014-01-15 アイシン・エィ・ダブリュ株式会社 Ｃｖｔベルト用エレメントの打ち抜き加工方法
JP5243400B2 (ja) * 2009-12-24 2013-07-24 本田技研工業株式会社 無段変速機用エレメントの製造方法
EP2399690B1 (de) 2010-06-24 2013-06-05 Feintool Intellectual Property AG Verfahren zum Herstellen von Schubgliedern eines Schubgliederbandes
NL1040584C2 (en) * 2014-01-02 2015-07-06 Bosch Gmbh Robert Fine-blanking device.
JP6774187B2 (ja) * 2016-02-16 2020-10-21 株式会社三井ハイテック 積層鉄心の製造方法及び積層鉄心の製造装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4894049A (en) * 1987-01-23 1990-01-16 Van Doorne's Transmissie B.V. Transmission belt, cross element for a transmission belt and method and device for the production thereof
US5640874A (en) * 1995-06-02 1997-06-24 United States Surgical Corporation Progressive die/carrier apparatus and method of forming surgical needles and/or incision members
US6453716B2 (en) * 2000-03-06 2002-09-24 Honda Giken Kogyo Kabushiki Kaisha Method of blanking elements of belt for continuously variable transmission
US6526798B2 (en) * 2000-05-26 2003-03-04 Honda Giken Kogyo Kabushiki Kaisha Method of blanking element for belt for continuously variable transmission
US20040029670A1 (en) * 2002-06-12 2004-02-12 Aida Engineering Co., Ltd. Method for making elements of a continuously variable transmission belt
US7076986B2 (en) * 2001-12-21 2006-07-18 Van Doorne's Transmissie B.V. Process for forming a linking element for a push belt for a continuously variable transmission

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001038429A (ja) * 1999-07-27 2001-02-13 Alps Electric Co Ltd プレス加工方法
JP2001303354A (ja) * 2000-02-16 2001-10-31 Mitsubishi Rayon Co Ltd プラスチックファイバの紡糸装置および紡糸方法
JP3701537B2 (ja) * 2000-02-21 2005-09-28 本田技研工業株式会社 ワークの打抜き加工方法及びその装置
DE60102958T2 (de) 2000-02-21 2005-04-07 Honda Giken Kogyo K.K. Verfahren und Vorrichtung zum Stanzen von Teilen von einem Riemen für stufenlos regelbares Getriebe
JP3707393B2 (ja) * 2001-04-06 2005-10-19 日産自動車株式会社 無段変速機用ｖベルト
JP2002361348A (ja) * 2001-06-11 2002-12-17 Topy Ind Ltd 無限軌道帯用リンクの製造方法
JP2004141887A (ja) * 2002-10-22 2004-05-20 Mitsui High Tec Inc 無段変速機用ベルトのエレメントの製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4894049A (en) * 1987-01-23 1990-01-16 Van Doorne's Transmissie B.V. Transmission belt, cross element for a transmission belt and method and device for the production thereof
US5640874A (en) * 1995-06-02 1997-06-24 United States Surgical Corporation Progressive die/carrier apparatus and method of forming surgical needles and/or incision members
US6453716B2 (en) * 2000-03-06 2002-09-24 Honda Giken Kogyo Kabushiki Kaisha Method of blanking elements of belt for continuously variable transmission
US6526798B2 (en) * 2000-05-26 2003-03-04 Honda Giken Kogyo Kabushiki Kaisha Method of blanking element for belt for continuously variable transmission
US7076986B2 (en) * 2001-12-21 2006-07-18 Van Doorne's Transmissie B.V. Process for forming a linking element for a push belt for a continuously variable transmission
US20040029670A1 (en) * 2002-06-12 2004-02-12 Aida Engineering Co., Ltd. Method for making elements of a continuously variable transmission belt

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113260469A (zh) * 2018-12-24 2021-08-13 罗伯特·博世有限公司 精密冲裁工艺

Also Published As

Publication number Publication date
EP1692414B1 (en) 2011-08-10
JP2007516084A (ja) 2007-06-21
NL1024957C2 (nl) 2005-06-07
JP4809776B2 (ja) 2011-11-09
WO2005054709A1 (en) 2005-06-16
ATE519966T1 (de) 2011-08-15
EP1692414A1 (en) 2006-08-23

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