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EP1542819A1 - Procede et dispositif de production d'une piece tubulaire, en particulier d'une tige de piston d'amortisseur, et piece correspondante - Google Patents

Procede et dispositif de production d'une piece tubulaire, en particulier d'une tige de piston d'amortisseur, et piece correspondante

Info

Publication number
EP1542819A1
EP1542819A1 EP03769317A EP03769317A EP1542819A1 EP 1542819 A1 EP1542819 A1 EP 1542819A1 EP 03769317 A EP03769317 A EP 03769317A EP 03769317 A EP03769317 A EP 03769317A EP 1542819 A1 EP1542819 A1 EP 1542819A1
Authority
EP
European Patent Office
Prior art keywords
workpiece
tubular
shoulder
starting
starting workpiece
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Withdrawn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
EP03769317A
Other languages
German (de)
English (en)
Inventor
Frank Grau
Detlef Moss
Marco Schreiner
Sergius Friesen
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.)
Felss GmbH
Original Assignee
Felss GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=31724850&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1542819(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Felss GmbH filed Critical Felss GmbH
Publication of EP1542819A1 publication Critical patent/EP1542819A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B21K1/06—Making machine elements axles or shafts
    • B21K1/10—Making machine elements axles or shafts of cylindrical form
    • 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
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/12—Shaping end portions of hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/025—Special design or construction with rolling or wobbling dies
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3221—Constructional features of piston rods
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2226/00—Manufacturing; Treatments

Definitions

  • the invention relates to a method for producing a tubular workpiece, in particular a shock absorber piston rod, in which, in a first method step, a first partial area of the starting workpiece is reduced from a tubular starting workpiece by means of a radial forming process, and an oblique to the longitudinal axis, to reduce its outside diameter of the tubular starting workpiece, a transition region is formed which connects the first partial region of the starting workpiece, which is reduced in its outer diameter, to a non-reduced second partial region which adjoins the transition region, and also a such a workpiece and a device for producing such a workpiece.
  • shock absorber piston rod Such a method is known and is used to cold-formed workpieces such.
  • shock absorber piston rods are used in particular in certain front axle constructions of motor vehicles in which the shock absorber also has to perform a wheel control task. For this reason, the shock absorber piston rod must have a larger diameter, in which case the piston rods are made of pipe and are made hollow in this way for reasons of weight saving.
  • a substantially rectangular shoulder is provided for the purpose of fastening the shock absorber of the vehicle.
  • the shoulder is formed in such a way that the body-side part of the outlet pipe is first reduced and the transition to the non-round-kneaded part of the pipe, which then has the outlet diameter of the outlet workpiece, is carried out at 45 °. This is necessary in order to keep the wall thickness of the output tube of the shock absorber piston rod essentially constant, and thereby to avoid weakening the wall of the workpiece.
  • This object is achieved according to the invention in that, in a second method step following the first method step, the transition region of the starting workpiece is set up to a rectangular shoulder of the workpiece by means of a shaping process.
  • the measures according to the invention advantageously ensure that a tubular workpiece with an essentially rectangular shoulder, in particular a shock absorber piston rod, can be produced in a simple manner from a tubular starting workpiece only by means of cold-forming process steps. It is therefore no longer necessary in the case of a workpiece produced by the method according to the invention, owing to the right-angled shoulder which can be produced directly by the method according to the invention, to use an adapter sleeve which is expensive to manufacture and assemble, thereby advantageously reducing the overall manufacturing costs.
  • the cold forming of the starting workpiece into the now one-piece end product advantageously has the advantage that there is no or only a slight weakening of the wall of the starting workpiece.
  • the forming process of the second method step is a wobble pressing, in particular by means of a Circular movement, a tilting movement or a multi-leaf movement, or an axial pressing.
  • FIG. 2 shows the workpiece of FIG. 1 after the second method step
  • a tubular starting workpiece 3 is first in its upper region by means of a known and therefore no longer described Cold forming process, such as. B. kneading, reduced so that this first portion 3a of the tubular starting workpiece 3 has a smaller outer diameter than the non-reduced second part 3b.
  • a transition region 3c between the first and the second partial regions 3a and 3b is preferably formed as a circumferential inclined surface with an inclination of approximately 45 ° with respect to the longitudinal axis A of the starting workpiece 3.
  • a shaping process in particular a wobble press or an axial press.
  • wobble pressing a wobble process with a circular movement, a tilting movement or a multi-leaf movement of the corresponding tool can advantageously be used.
  • Such forming processes are known to the person skilled in the art and therefore do not have to be described in more detail.
  • the method is advantageously suitable in particular for producing a shock-absorbing piston rod with a right-angled shoulder.
  • a shock absorber piston rod it is also possible, in addition to such a shock absorber piston rod, to produce other pieces of value, which must have a rectangular shoulder, in one piece from a tubular starting piece.
  • FIGS. 3 and 4 now show an exemplary embodiment of a device, generally designated 10, for producing the workpiece 1 with an essentially rectangular shoulder 2.
  • the device 10 has a reducing unit 11, which in the case shown here is a circular kneading tool with several Round kneading jaws 12 is formed.
  • the round kneading jaws 12 act on the starting workpiece 3 in the radial direction R.
  • Each round kneading jaw 12 has a shaping bevel 13, the inclination of which in turn is approximately 45 ° with respect to the longitudinal axis A of the starting workpiece 3, that is to say essentially corresponds to the inclination of the inclined surface of the transition region 3c to be produced.
  • the starting workpiece 3 becomes a further forming unit from the above-described reduction unit 11 of the device 10 for carrying out the second method step of the device 10, which in the case described here is designed as an orbital forming unit 15.
  • This orbital forming unit 15 has a wobble tool 16, which carries out a wobbling movement about the longitudinal axis A and acts with its working surface 17 on the transition region 3c of the starting workpiece 3 until the essentially rectangular shoulder 2 is formed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Forging (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

L'invention concerne un procédé permettant de produire une pièce tubulaire, en particulier une tige de piston d'amortisseur. La première étape de ce procédé consiste à réduire une première zone partielle (3a) d'une pièce de départ tubulaire (3) au moyen d'une opération de formage radial pour diminuer les dimensions de son diamètre extérieur, puis à former une zone de transition (3c) qui s'étend transversalement à l'axe longitudinal (A) de la pièce de départ tubulaire (3) et relie la première zone partielle (3a) de la pièce de départ (3) présentant un diamètre extérieur réduit à une deuxième zone partielle (3b) non réduite, adjacente à ladite zone de transition (3c). Selon l'invention, la deuxième étape subséquente dudit procédé consiste à aplatir ladite zone de transition (3c) de la pièce de départ (3) au moyen d'une opération de formage pour conférer à la pièce (1) une épaule (2) présentant une angle sensiblement droit.
EP03769317A 2002-09-26 2003-09-25 Procede et dispositif de production d'une piece tubulaire, en particulier d'une tige de piston d'amortisseur, et piece correspondante Withdrawn EP1542819A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10245570 2002-09-26
DE10245570A DE10245570B3 (de) 2002-09-26 2002-09-26 Verfahren zur Herstellung eines rohrförmigen Werkstücks, insbesondere einer Stoßdämpfer-Kolbenstange, sowie ein derartiges Werkstück
PCT/EP2003/010655 WO2004030847A1 (fr) 2002-09-26 2003-09-25 Procede et dispositif de production d'une piece tubulaire, en particulier d'une tige de piston d'amortisseur, et piece correspondante

Publications (1)

Publication Number Publication Date
EP1542819A1 true EP1542819A1 (fr) 2005-06-22

Family

ID=31724850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03769317A Withdrawn EP1542819A1 (fr) 2002-09-26 2003-09-25 Procede et dispositif de production d'une piece tubulaire, en particulier d'une tige de piston d'amortisseur, et piece correspondante

Country Status (9)

Country Link
US (1) US20060042343A1 (fr)
EP (1) EP1542819A1 (fr)
JP (1) JP2006500222A (fr)
KR (1) KR20050044932A (fr)
CN (1) CN1684783A (fr)
AU (1) AU2003277898A1 (fr)
CA (1) CA2501080A1 (fr)
DE (1) DE10245570B3 (fr)
WO (1) WO2004030847A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008037549B3 (de) * 2008-11-12 2009-12-03 Heinrich Müller Maschinenfabrik GmbH Verfahren und Vorrichtung zur Herstellung eines rohrförmigen Werkstücks
CN100591944C (zh) * 2008-11-24 2010-02-24 南阳淅减汽车减振器有限公司 汽车减振器活塞杆生产工艺方法
CN102581153A (zh) * 2012-01-06 2012-07-18 昌河飞机工业（集团）有限责任公司 一种收口拉杆加工方法
CN102581211B (zh) * 2012-02-02 2014-08-06 哈尔滨飞机工业集团有限责任公司 航空器整体式铝合金拉杆冷成形方法
CN103831581B (zh) * 2012-11-23 2016-02-24 亚柏士气动工具股份有限公司 气动工具的冲击轴的制造方法及气动工具的冲击轴
US20170356483A1 (en) * 2016-06-14 2017-12-14 Lippert Components, Inc. Cold-worked riveted piston/rod assembly and method of making same
CN106964748B (zh) * 2017-03-24 2019-04-23 常州永茂特种紧固件有限公司 活塞杆的加工方法及其加工工装
KR102417271B1 (ko) * 2020-01-29 2022-07-06 대성코리아(주) 쇽 업소버용 피스톤 로드 제조방법
KR102411985B1 (ko) * 2020-02-17 2022-06-22 양희수 쇽업소버의 피스톤로드 제조방법
CN112170773A (zh) * 2020-08-25 2021-01-05 福建龙溪轴承(集团)股份有限公司 轻合金非回转体异型整体式拉杆精锻近净成型技术
DE102021103689B3 (de) * 2021-02-17 2022-05-19 GFU - Maschinenbau GmbH Gesellschaft für Umformung und Maschinenbau Verfahren zum Herstellen einer stufenförmigen Querschnittsverjüngung an einem einteiligen, rohrförmigen Werkstück aus Metall, damit hergestelltes einteiliges, rohrförmiges Werkstück und Vorrichtung zur Durchführung des Verfahrens
CN114210901A (zh) * 2021-10-26 2022-03-22 陕西钛博飞特航空制造股份有限公司 一种航空发动机用钛合金连杆体积成型专用模具

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868842A (en) * 1971-10-12 1975-03-04 William Edward Anthony Method of making lap pin
GB1472860A (en) * 1974-12-02 1977-05-11 Stevens Bullivant Ltd Metal-forming
DE3313273A1 (de) * 1983-04-13 1984-10-18 Gebrüder Felss, 7535 Königsbach-Stein Verfahren zur reduzierung von rohrenden zu druckdichten zapfen
FR2596481B1 (fr) * 1986-03-27 1989-10-27 Allinquant Sa Tige de piston pour appareil telescopique tel qu'amortisseur et ressort pneumatique
DE69304432T2 (de) * 1992-06-12 1997-02-20 Agency Ind Science Techn Verfahren zum Formen eines ringförmigen Elementes
US6247346B1 (en) * 1996-12-18 2001-06-19 Alcoa Inc. Method of forming a drive shaft
WO1999008820A1 (fr) * 1997-08-13 1999-02-25 Hirschvogel Umformtechnik Gmbh Procede pour la fabrication d'un pignon de changement de vitesses, dispositif pour la mise en oeuvre de ce procede et pignon de changement de vitesses realise selon ce procede
US6230540B1 (en) * 1999-10-19 2001-05-15 Meritor Heavy Vehicle Systems Llc Method and apparatus for forming an integral bearing shoulder in a tubular axle
US6792782B2 (en) * 1999-11-30 2004-09-21 Parker Hannifin Sa Method for deforming a tube near one of its ends and tool used in this method
FR2801522B1 (fr) * 1999-11-30 2002-02-01 Parker Hannifin Sa Procede de deformation d'un tube a proximite de l'une de ses extremites et outil mis en oeuvre dans ce procede

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004030847A1 *

Also Published As

Publication number Publication date
DE10245570B3 (de) 2004-03-18
US20060042343A1 (en) 2006-03-02
WO2004030847A1 (fr) 2004-04-15
KR20050044932A (ko) 2005-05-13
AU2003277898A1 (en) 2004-04-23
CN1684783A (zh) 2005-10-19
JP2006500222A (ja) 2006-01-05
CA2501080A1 (fr) 2004-04-15
WO2004030847A9 (fr) 2004-08-19

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