EP2344289B1 - Verfahren zur herstellung eines mit einem durchgehenden loch versehenen formteils und vorrichtung zur durchführung des verfahrens - Google Patents

Verfahren zur herstellung eines mit einem durchgehenden loch versehenen formteils und vorrichtung zur durchführung des verfahrens Download PDF

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Publication number
EP2344289B1
EP2344289B1 EP09775793A EP09775793A EP2344289B1 EP 2344289 B1 EP2344289 B1 EP 2344289B1 EP 09775793 A EP09775793 A EP 09775793A EP 09775793 A EP09775793 A EP 09775793A EP 2344289 B1 EP2344289 B1 EP 2344289B1
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EP
European Patent Office
Prior art keywords
blank
die
disc
guide
force
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.)
Active
Application number
EP09775793A
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German (de)
English (en)
French (fr)
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EP2344289A1 (de
Inventor
Andreas Matt
Mihai Vulcan
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.)
Hatebur Umformmaschinen AG
Original Assignee
Hatebur Umformmaschinen AG
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Publication of EP2344289A1 publication Critical patent/EP2344289A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
    • B21K1/761—Making machine elements elements not mentioned in one of the preceding groups rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/04—Making machine elements ball-races or sliding bearing races
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs

Definitions

  • the invention relates to a method for producing a molding provided with a through hole according to the preamble of claim 1 and to an apparatus for carrying out the method according to the preamble of independent claim 12.
  • Such a method is for example from the DE 31 47 897 A1 known.
  • the serial production of identical annular metal parts starting from a metallic, rod-shaped blank by compression and thereby causing deformation of an end portion of the blank into a disc and then axial puncture of the disc by means of a stamp of the same cross-sectional shape as the (uncompressed) blank and separating takes place of the disc punctured disc core from the disc.
  • the integral with the uncompressed blank section blank core together with the latter forms the starting point for another cycle of the process until the remaining blank remnant is no longer sufficient for the formation of other moldings and is lost as waste.
  • the invention has for its object to improve a method of the type mentioned in such a way that the moldings produced therewith require no or at least a much lower post-processing.
  • the molded parts in the region of their generated through hole should have no significant fracture phenomena, burrs or other deformations.
  • bar material is understood as meaning any material form having pronounced longitudinal extent and any cross-section which is constant over the longitudinal extent.
  • bars, bars and wires of any dimensions fall under this definition.
  • Circular cross sections are the rule, but the invention is not limited thereto.
  • the term "bar-shaped” is to be understood analogously.
  • Disc in the present context is understood to mean any body shape widened in relation to the blank in the cross-sectional dimensions. Flat discs with a particular circular outer contour are the rule, but the invention is not limited thereto.
  • the essence of the invention consists in the following: In a method for producing a molded part provided with a through hole, in a feed step, a rod-shaped blank is moved in its longitudinal direction through a Guide the same cross-sectional shape as the blank by a defined length in a die whose inner peripheral wall defines the outer circumference of the molded part to be produced, advanced and then held. In at least one forming step, the end region of the blank located outside the guide on the die side is axially compressed by means of a die and thereby formed into a disk limited in the circumference by the die.
  • the disk located in the die is penetrated by means of a coaxial stamp for the same cross-sectional shape as the guide, while a piece integral with the undeformed part of the blank disk core of the same cross-sectional shape pushed out of the disk, pushed into the guide and together with in the Guide located undeformed part of the blank moved back against the feed direction of the blank.
  • a separation step the pierced disc is separated from the disc core and finally in a removal step, the finished molding is removed from the die.
  • the disc located in the die is acted upon by a sleeve-shaped, holding the punch movable, relative to the punch movable hold-down organ of the die with an axial compressive force in Scheibenkernausstosscardi and the blank with an axial counterforce against the Scheibenkernausstossutter, the outer contour of the hold-down organ in the Substantially corresponds to the inner contour of the die.
  • an axial compressive force in the disc core ejection direction is exerted on the disc located in the female part.
  • the blank is retained during the forming step, the piercing step and the separating step by means of a clamping arrangement acting on its circumference.
  • the counterforce is preferably introduced into the blank with the aid of the clamping arrangement acting on the outer circumference of the blank.
  • the counterforce can either be applied to the clamping arrangement and transmitted from there to the blank, or the counterforce is generated by the frictional force acting on the blank by the clamping arrangement
  • the axial compressive force and the opposing force acting against it are preferably dimensioned so that a stress state is achieved in the disc by superposition of compressive stress, which at least compensates for the shear and tensile stresses acting in the disc during penetration. As a result, fractures, burrs or other deformations are optimally avoided at the peripheral edge of the generated through hole.
  • the pane core is not ejected completely from the pane, but preferably only up to about 98-99% of its height or the thickness of the pane.
  • the blank with the integral with him disc core while retaining the said axial pressure force on the disc located in the die axially withdrawn or axially moved away from the disc located in the die until the disc core is separated from the remaining disc ring.
  • the formation of undesirable deformations on the inner edge of the molded part is avoided and also prevents the punch strikes the inner edge of the die.
  • the blank is held and moves the die with the disc located in it from the blank.
  • the blank is held between two dies, which cause the advance of the blank and the compression of the same. This is the length of the blank and thus the Number of limited producible with a blank moldings and the unusable residual pieces of blanks are lost as waste.
  • this problem is avoided by using a clamping arrangement which acts on the circumference of the blank to support the blank and fix it in position during the forming step and preferably also during the piercing step and during the separating step.
  • This clamping arrangement can be arranged, for example, in the feed direction shortly before the guide. In this way, the length of the blanks is not limited by a second die, so that even long rods or quasi-endless blank material, which is for example wound on coils, can be processed and accordingly virtually no appreciable waste arises
  • the blank is produced in a reduction step by cross-sectional tapering of a rod material of larger cross-sectional dimensions.
  • the starting material used is a rod material which has larger cross-sectional dimensions than the blank required for the production of the shaped parts, and this rod material is tapered to the cross-sectional dimensions required for the blank or the molded parts to be produced therefrom.
  • the taper can e.g. in a conventional manner by means of a superior Reduziermatrize done by which the bar material during the advance of the blank in the feed step or in an upstream forming step is pressed and / or pulled. In this way, the dimensions of the rod material do not have to match those of the blank and mold parts of different dimensions can be produced with one and the same rod material. This simplifies u.a. the procurement and storage of the bar material considerably.
  • a suitable device for carrying out the inventive method comprises a guide for a blank, a die, a movable die with a punch for axial compression and deformation of an end portion of the blank, feed means for the blank and retaining means for the blank.
  • the die comprises a sleeve-shaped holding-down member which surrounds the punch and is movable relative to the punch, by means of which an axial pressure force can be applied to a disk located in the die, the outer contour of the hold-down member substantially corresponding to the inner contour of the die, and the retaining means comprise one on the periphery of the blank engaging clamping assembly, which is formed separately from the guide and the die and for introducing an axial counterforce in the blank.
  • the clamping arrangement is adjustable in the longitudinal direction of the blank.
  • the device has a Querterrorismsreduzieran Aunt for forming the blank of a bar material of larger cross-sectional dimensions. This allows the production of differently sized moldings from a limited set of different bar materials.
  • the method according to the invention and the device according to the invention can be used in cold to hot forming over the entire temperature range.
  • FIGS 1-6 illustrate a first embodiment of the invention, wherein only the essential parts for understanding the invention of the device are shown. It can be seen a guide 1, a die arranged above 2, a die 3 and a clamping arrangement 4 and only symbolized by an arrow feed means 5 and 50 for a rod-shaped blank R with a circular cross-section, for the clamping arrangement 4 and for the die 3.
  • Die Guide 1, the die 2, the die 3 and the clamping assembly 4 are aligned coaxially with each other.
  • the die 3 comprises a punch 31 and a substantially sleeve-shaped or ring-shaped hold-down member 32 enclosing it.
  • the guide 1 and the die 2 are stationary while the die 3 and the clamping assembly 4 are arranged to be axially movable.
  • the guide 1, the die 2, the die 3, the clamping arrangement 4 and the Feeding means 5, 50 are parts of a forming machine, which in a conventional manner drive means for the realization of the movements of the mentioned device parts to be described as well as for the generation of the required forces.
  • the expert requires no further explanation.
  • the stationary guide 1 has a continuous, in this example cylindrical guide opening 11 with substantially the same cross-sectional shape as the blank R used.
  • the likewise stationary die 2 has a cylindrical inner space 21 whose diameter is greater than the diameter of the blank R or
  • the punch 31 of the die 3 is formed cylindrically and has substantially the same cross-sectional shape as the blank R.
  • the hold-down member 32 of the die 3 has the shape of a cylindrical tube, wherein its outer diameter substantially corresponds to the inner diameter of the die 2.
  • the punch 31 and the hold-down member 32 here have planar end faces 31a and 32a.
  • the clamping arrangement 4 has, for example, two opposing clamping jaws 41 and 42, which are adapted to the outer shape of the blank R.
  • the method according to the invention runs in a repetitive cycle.
  • the blank R is advanced by means of the provided with a feed means 5 clamping assembly 4 through the guide 1 and the die 2 in its longitudinal direction until the required volume of material for the conversion is available.
  • the punch 31 is advanced until its end surface 31 a in Fig. 1 shown position of Umformbeginns achieved.
  • the portion of the blank extending from the guide 1 to the die 3 is referred to below as the end region.
  • the clamping arrangement 4 acted upon by a clamping force F K is held stationary and the blank R is fixed axially.
  • the die 3 as a whole is pressed axially against the end region of the blank R, wherein the punch 31 and the hold-down member 32 with a punch force F st and a hold-down force F NH are applied.
  • the end portion of the blank is compressed and - in the die into - transformed, initially a bead-like deformation W is formed, which in particular does not yet fill the corner regions of the die 2 ( Fig. 2 ).
  • the bead-like deformation W is formed into a disc S, which fills the die 2 and has the definite external shape of the molded part to be produced ( Fig. 3 ).
  • the outer shape of the molded part to be produced is already reached after these two process steps. Now follows an enforcing step, in which the central ring opening of the molded part to be produced is generated.
  • the punch 31 of the die 3 is pressed axially by the application of an axial punching force F st through the slice S.
  • the blank R still held in the clamping arrangement 4 is moved away from the guide 1 together with it, counter to a defined counterforce F G acting axially on the clamping arrangement 4.
  • a one-piece with the blank disc nucleus K s is forced out of the disc S and moved to the guide 1 by the punch 31 ( Fig. 4 ).
  • the hold down member 32 holds the disc S in the die 2 and urges it with an axial pressing force F NH .
  • the described counterforce F G acts axially on the blank and the disc S.
  • the axial compressive force F NH and the axial counterforce F G generate a compressive stress in the disc S, which superimposed on the shear and tensile stresses occurring when passing through the disc and compensated or even overcompensated.
  • the described penetration process is terminated before the disk core K s is completely pushed through. In practice, this means that the disk core K s is pushed through to about 98-99% or is within the disk S with about 1-2% of its height, which corresponds to the thickness of the disk S.
  • the enlarged detail of the Fig. 4a clarifies this.
  • the hold-down member 32 holds the disc S in the die 2 and urges it with an axial pressing force F NH .
  • the still held in the clamping arrangement 4 blank R is in this step together with the clamping assembly 4 under the action of a release force F L against the feed direction of the blank by a short distance from the stationary guide 1 and the stationary die 2 moved away in the Fig. 5 So down.
  • the integral with the blank disk core K s is thereby separated from the disc S, whereby the disc S now has a continuous central hole and thus finished molded part has the desired shape.
  • the opposing force F G acting on the blank can also be generated by friction according to an alternative method variant.
  • the clamping assembly 4 is kept stationary and the clamping force F K set slightly lower so that the blank R can move against the frictional resistance generated by the clamping action by the clamping arrangement 4.
  • the frictional resistance corresponds to the said counterforce.
  • the separating step can also be carried out so that the blank is not moved away from the die but the blank R is held in the clamping arrangement 4 and the die 2 with the slice S located in it, possibly together with the guide 1 , is moved away from the blank.
  • the required for this, acting on the die 2 and the guide 1 release force is in Fig. 5 symbolized by the arrow F La .
  • the finished molded part located after these process steps in the die 2 is designated FT and is now removed in a removal step from the device, wherein this is preferably done by ejecting the molding FT with an ejector not shown here.
  • the die 3 in the in Fig. 6 shown position while at the same time retracted the punch 31 in the hold-down member 32 until their faces are again in a plane.
  • a gripping device 6 symbolized only by an arrow grips the finished molded part FT and leads it eg to a collection container, not shown, or to another processing station.
  • the die 3 and the clamping arrangement 4 are again in their in Fig. 1 shown starting positions, and another cycle of the process can begin.
  • the Figures 7-12 illustrate a second embodiment of the invention, which differs from the embodiment according to the Figures 1-6 essentially only differs in that in the feed direction of the blank R before the clamping arrangement 4 is arranged coaxially to this a Queritessreduzieran Aunt in the form of a Reduziermatrize 7.
  • the Reduziermatrize 7 is arranged at a fixed distance to the clamping arrangement and mitbewegbar with the latter.
  • a rod material R A is used as the starting material, which has larger cross-sectional dimensions than the actual blank R required for the production of the moldings, and the actual blank R is formed from this thicker rod material R A in a Reduzier suits.
  • the cross-sectional dimensions of the blank R are reduced to the desired or required dimension before reaching the clamping arrangement 4 or the guide 1.
  • This cross-sectional or thickness tapering is advantageously carried out in the context of the advancing step of the method, but can also take place in an upstream step. Due to the cross-sectional taper in the course of the rest of the procedure, the dimensions of the rod material do not have to match those of the blank and it can be made with one and the same rod material moldings of different dimensions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
EP09775793A 2008-10-10 2009-10-02 Verfahren zur herstellung eines mit einem durchgehenden loch versehenen formteils und vorrichtung zur durchführung des verfahrens Active EP2344289B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01607/08A CH699706A1 (de) 2008-10-10 2008-10-10 Verfahren zur Herstellung eines mit einem durchgehenden Loch versehenen Formteils.
PCT/CH2009/000316 WO2010040238A1 (de) 2008-10-10 2009-10-02 Verfahren zur herstellung eines mit einem durchgehenden loch versehenen formteils

Publications (2)

Publication Number Publication Date
EP2344289A1 EP2344289A1 (de) 2011-07-20
EP2344289B1 true EP2344289B1 (de) 2012-08-15

Family

ID=40459743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09775793A Active EP2344289B1 (de) 2008-10-10 2009-10-02 Verfahren zur herstellung eines mit einem durchgehenden loch versehenen formteils und vorrichtung zur durchführung des verfahrens

Country Status (10)

Country Link
US (1) US9120142B2 (zh)
EP (1) EP2344289B1 (zh)
JP (1) JP5421996B2 (zh)
KR (1) KR101343157B1 (zh)
CN (1) CN102216000B (zh)
CH (1) CH699706A1 (zh)
EA (1) EA019548B1 (zh)
ES (1) ES2391710T3 (zh)
UA (1) UA98890C2 (zh)
WO (1) WO2010040238A1 (zh)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH703639B1 (de) * 2010-08-24 2014-04-15 Hatebur Umformmaschinen Ag Verfahren zur Umformung eines vorlaufenden Endabschnitts eines Stangenmaterials.
CN103402468A (zh) 2012-03-01 2013-11-20 爱乐康株式会社 伤口处理用品
WO2013149270A1 (de) * 2012-04-03 2013-10-10 Thyssenkrup Presta Aktiengesellschaft VERFAHREN ZUR HERSTELLUNG EINES FLIEßGEPRESSTEN LAGERZAPFENS
CN103433746B (zh) * 2013-08-19 2016-02-17 宁波中斌紧固件制造有限公司 一种无废料垫圈成型设备
JP6461654B2 (ja) 2015-03-10 2019-01-30 トヨタ紡織株式会社 ヘッドレストステーの製造方法
CH711646A1 (de) * 2015-10-14 2017-04-28 Hatebur Umformmaschinen Ag Verfahren und Vorrichtung zur Herstellung eines ringförmigen Formteils.
CH712716A1 (de) * 2016-07-19 2018-01-31 Hatebur Umformmaschinen Ag Verfahren und Vorrichtung zum Abscheren von Stangenmaterial.
CN108436005A (zh) * 2018-05-10 2018-08-24 马鞍山钢铁股份有限公司 一种毛坯冲孔方法

Family Cites Families (17)

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Publication number Priority date Publication date Assignee Title
FR661584A (fr) * 1928-10-06 1929-07-26 Procédé de forgeage par action hydraulique
JPS5134440Y2 (zh) 1972-11-10 1976-08-25
JPS4986250A (zh) * 1972-12-21 1974-08-19
JPS5870935A (ja) * 1981-10-26 1983-04-27 Nissan Motor Co Ltd リングの製造方法
US4435973A (en) * 1981-11-25 1984-03-13 Nissan Motor Co., Ltd. Method of producing ring-shaped metal parts
DE3147897A1 (de) * 1981-12-03 1983-06-09 Nissan Motor Co., Ltd., Yokohama, Kanagawa Verfahren zum herstellen von ringfoermigen metallteilen
JPS5950945A (ja) * 1982-09-14 1984-03-24 Tanaka Kikinzoku Kogyo Kk 継ぎ目無し金属環の製造装置
JPS6284849A (ja) * 1985-10-11 1987-04-18 Mitsubishi Metal Corp リングの製造方法
JPS6422434A (en) 1987-07-17 1989-01-25 Toyota Motor Corp Punching method simultaneously with forming
US4932251A (en) * 1987-12-22 1990-06-12 Miyamatool Kabushikikaisha Method of producing a core for a fuel injector
JPH0362637A (ja) 1989-07-31 1991-03-18 Fujitsu Ten Ltd 赤外線通信方式
US5259819A (en) * 1991-10-07 1993-11-09 Lee Wen Yuan Method of manufacturing a washer
JP3062637B2 (ja) 1991-12-19 2000-07-12 伊勢電子工業株式会社 蛍光表示管の製造方法
JPH06284849A (ja) 1993-03-31 1994-10-11 Bridgestone Corp 貝類の付着を防止した汚濁防止膜
JPH0986250A (ja) 1995-09-20 1997-03-31 Nhk Spring Co Ltd 自動車用シートのヘッドレストステー
JP3062637U (ja) * 1999-03-31 1999-10-08 株式会社阪村機械製作所 圧造成形機の素材供給装置
WO2008111119A1 (ja) 2007-03-12 2008-09-18 Kanemitsu Corporation リング状部材の製造方法

Also Published As

Publication number Publication date
CN102216000A (zh) 2011-10-12
UA98890C2 (ru) 2012-06-25
US9120142B2 (en) 2015-09-01
EP2344289A1 (de) 2011-07-20
CN102216000B (zh) 2015-12-09
WO2010040238A1 (de) 2010-04-15
KR101343157B1 (ko) 2013-12-19
KR20110067032A (ko) 2011-06-20
US20110193257A1 (en) 2011-08-11
JP2012505078A (ja) 2012-03-01
CH699706A1 (de) 2010-04-15
JP5421996B2 (ja) 2014-02-19
EA201100591A1 (ru) 2011-10-31
EA019548B1 (ru) 2014-04-30
ES2391710T3 (es) 2012-11-29

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