EP1252947B1 - Verfahren zur Herstellung eines Achselementes für Kraftfahrzeuge - Google Patents

Verfahren zur Herstellung eines Achselementes für Kraftfahrzeuge Download PDF

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Publication number
EP1252947B1
EP1252947B1 EP02008689A EP02008689A EP1252947B1 EP 1252947 B1 EP1252947 B1 EP 1252947B1 EP 02008689 A EP02008689 A EP 02008689A EP 02008689 A EP02008689 A EP 02008689A EP 1252947 B1 EP1252947 B1 EP 1252947B1
Authority
EP
European Patent Office
Prior art keywords
punch
semi
forging
finished product
semifinished product
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.)
Expired - Lifetime
Application number
EP02008689A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1252947A3 (de
EP1252947A2 (de
Inventor
Michael Dr. Heussen
Bernard Comte
Vincent von Niederhäusern
Andreas Baak
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.)
Benteler Automobiltechnik GmbH
Original Assignee
Benteler Automobiltechnik 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
Application filed by Benteler Automobiltechnik GmbH filed Critical Benteler Automobiltechnik GmbH
Publication of EP1252947A2 publication Critical patent/EP1252947A2/de
Publication of EP1252947A3 publication Critical patent/EP1252947A3/de
Application granted granted Critical
Publication of EP1252947B1 publication Critical patent/EP1252947B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08—Upsetting
    • 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
    • B21K1/12—Making machine elements axles or shafts of specially-shaped cross-section

Definitions

  • the invention relates to a method for producing a pivot bearing for motor vehicles.
  • Axle elements of motor vehicles are relatively complex, cast or forged one-piece components, which are made of a cast steel material or aluminum. At Schwenklagern attack considerable forces, which is why these components are usually made of a solid material. For reasons of weight saving, light metals such as aluminum are increasingly being used.
  • the JP-A-06 315734 discloses a method for producing a pivot bearing, a motor vehicle, in which a curved rod-shaped semi-finished Heated aluminum and compressed in an engraving of a forming tool.
  • the engraving has three different branches corresponding to the rough contour of the pivot bearing.
  • the three branches are each at an angle to each other.
  • the cooperating stamp compress the bar-shaped semifinished product together in such a way that in the third branch a leg is formed, so that a Vorschmiede institutions arises, which can be finally final molded.
  • the invention is therefore based on the object of demonstrating an improved method for producing a pivot bearing for motor vehicles from a rod-shaped semi-finished aluminum, in which the amount of energy to be supplied for forming is reduced and production-related material losses are reduced.
  • the solution according to the invention lies in a method for producing a pivot bearing for motor vehicles, according to claim 1.
  • the uniform mass distribution of the rod-shaped semifinished product in particular a round material, is changed with respect to the axle element to be manufactured so that more material is provided in areas with larger mass accumulations in a preliminary stage of the actual forging process, as in other areas and
  • a mass distribution is achieved similar to that of the axle to be manufactured.
  • the forming tool has an engraving, which allows a thickening of the material in discrete areas.
  • the first end can be pushed up directly by the stamp.
  • it can also be provided a recess of the engraving at a distance from the first end of the semifinished product, in which results in the upsetting process accumulation of material by compressed material.
  • the geometric shape of the engraving is determined taking into account specific diameter / compression ratio. To avoid puckering on the surface, the compression length should not exceed a fivefold of the diameter of the semifinished product.
  • the first punch is moved up to the semifinished product and then moves at a speed of up to 150 mm / s to the specified compression length.
  • a second punch acts on the second end of the semifinished product and presses it into the engraving.
  • the compressed material flows backwards into a branch of the engraving, which is at an angle to the central longitudinal axis of the rod-shaped semi-finished product.
  • the pressed material is formed into a leg.
  • the branch can be formed halfway upset length.
  • the engraving is designed such that a neutral fiber is formed in the region of the central longitudinal plane of the formed leg. This ensures that in the subsequent finished forging in the die this neutral fiber flows into the ridge and thus a perfect directional microstructure in the component is made possible.
  • the neutral fiber is influenced by the parameters of punch speed, temperature of the forming tool and the semifinished product, geometry of the engraving and friction on the surface of the engraving in their recrystallization behavior. By optimizing these parameters, recrystallization can be reduced to a minimum.
  • the semifinished product thus formed into a pre-forged piece is subsequently finally shaped in a forging process.
  • the second end of the semifinished product is pressed against the holding force of the first stamp in the engraving. This means that after the Aufstauchvorgang the first punch this acts as a counter-holder and without loss of time or implementation of the workpiece, the extrusion process can be initiated by the second punch. Conversely, the second punch also serves as an anvil during the upsetting process.
  • the first end of the preformed semi-finished product is further compressed before the forging process in a second forming tool.
  • This can be particularly advantageous if the forces applied by the first stamp for upsetting must not exceed a certain level, so that material does not flow uncontrollably into the branch of the engraving, but is introduced controlled by the extrusion process by the second punch in the branch , A second forming tool thus enables even more near-contour contouring of the pre-forging.
  • the above-described method is suitable for the production of differently configured shaft elements, but in particular for the production of pivot bearings.
  • FIG. 1 shows a rod-shaped semi-finished product 1 made of aluminum, concretely an extruded round material. This semifinished product 1 is heated in a production step, not shown, to a temperature of 450 ° C and then formed in two steps.
  • the first production step is an upsetting of the first end 2 of the semifinished product 1 to a diameter D2, which is approximately twice as large as the diameter D1 of the semifinished product 1.
  • the remaining uncompressed length L2 of the semifinished product 1 is slightly more than half of the initial length L1 of the uncompressed semifinished product 1.
  • the upsetting of the semifinished product 1 takes place in a forming tool 3 according to FIG. 5 ,
  • the semifinished product 1 is inserted into an engraving 4 of the forming tool 3 and enclosed by the forming tool 3.
  • a first punch 5 acts on the first end 2 of the semifinished product 1 and upsets it in accordance with the contouring of the engraving 4 of the forming tool 3.
  • the first punch 5 serves as an anvil, while the second punch 8 presses the second end 9 of the semifinished product 1 into the engraving 4.
  • the pressed material is fed to an end open branch 10 of the engraving 4, wherein a leg 11 is formed at the second end 9 of the semifinished product 1, as shown in the pre-forging 12 produced from the semifinished product 1 FIG. 3 can be seen.
  • the leg 11 is formed according to the contour of the branch 10 so that the extrusion results in a favorable fiber flow in the pre-forging, that is, the branch 10 and the leg 11 is provided in the transition to the semifinished product 1 longitudinal engraving with radii , so that a smooth transition results.
  • the semi-finished product 1 formed into the pre-forged piece 12 is removed from the forming tool 3 and heated to a forging temperature of about 520 ° C. Subsequently, the in FIG. 3 shown forge piece 12 to the pivot bearing shown in Figure 4 forging final.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Braking Arrangements (AREA)
EP02008689A 2001-04-23 2002-04-18 Verfahren zur Herstellung eines Achselementes für Kraftfahrzeuge Expired - Lifetime EP1252947B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10119839A DE10119839C2 (de) 2001-04-23 2001-04-23 Verfahren zur Herstellung eines Achselements für Kraftfahrzeuge
DE10119839 2001-04-23

Publications (3)

Publication Number Publication Date
EP1252947A2 EP1252947A2 (de) 2002-10-30
EP1252947A3 EP1252947A3 (de) 2003-01-15
EP1252947B1 true EP1252947B1 (de) 2008-05-28

Family

ID=7682393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02008689A Expired - Lifetime EP1252947B1 (de) 2001-04-23 2002-04-18 Verfahren zur Herstellung eines Achselementes für Kraftfahrzeuge

Country Status (5)

Country Link
US (1) US6735996B2 (cs)
EP (1) EP1252947B1 (cs)
AT (1) ATE396809T1 (cs)
CZ (1) CZ301111B6 (cs)
DE (2) DE10119839C2 (cs)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10303184B3 (de) * 2003-01-28 2004-04-08 Benteler Automobiltechnik Gmbh Verfahren und Vorrichtung zur Herstellung von einer in ihrer Dicke mindestens in einem Bereich variierenden Platine
DE10324244A1 (de) * 2003-05-28 2004-12-30 Bayerische Motoren Werke Ag Verfahren zur Herstellung individualisierter Außenhautblechteile aus in Serienfertigung hergestellten Serienaußenhautblechteilen für Fahrzeuge sowie nach diesem Verfahren hergestellte Außenhautblechteile
US7661282B2 (en) * 2008-03-21 2010-02-16 Gm Global Technology Operations, Inc. Hot forming process for metal alloy sheets
DE102011105244A1 (de) * 2011-02-04 2012-08-09 Sms Meer Gmbh Verwendung eines Warmstauchverfahrens, Verwendung eines Umformwerkzeuges, Verfahren zum Erzeugen einer Schmiedevorform und Umformvorrichtung oder Warmstauchvorrichtung
CN102240688B (zh) * 2011-05-13 2013-07-03 北京机电研究所 后桥整体车轴快捷挤压成形的方法
WO2015031118A1 (en) * 2013-08-29 2015-03-05 Eaton Corporation Bearing pin upset method to retain high hardness pins
GB2522024B (en) * 2014-01-09 2017-05-10 Rolls Royce Plc A Forging Apparatus
WO2016100675A2 (en) 2014-12-17 2016-06-23 American Axle & Manufacturing, Inc. Method of manufacturing a tube and a machine for use therein
JP6537151B1 (ja) * 2018-05-31 2019-07-03 株式会社関プレス 突起部形成方法、突起部形成システム、及び突起部を有する金属部品の製造方法
CN113070438B (zh) * 2021-04-06 2024-06-18 江阴雷特斯钻具有限公司 双臂钻杆内钻杆的加厚模具及加厚方法
CN115415745B (zh) * 2022-09-09 2024-01-26 江苏双环齿轮有限公司 含孔轴系多台阶类精密模锻件的生产工艺

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1050460A (en) * 1911-12-20 1913-01-14 Reinhold G Housdorfer Die for forming axles.
JPS56119640A (en) * 1980-02-27 1981-09-19 Diesel Kiki Co Ltd Method for heating blank material forming plural projections along axial direction of cam shaft or the like
JPS59166338A (ja) * 1983-03-10 1984-09-19 Toyota Motor Corp トリポ−ドの製造方法
JPH0663677A (ja) * 1992-08-11 1994-03-08 Showa Denko Kk アルミニウム部品の製造方法および装置
JPH06292936A (ja) * 1993-04-12 1994-10-21 Suzuhide Kogyo Kk ホース用中間金具の成形方法
JPH06315734A (ja) * 1993-05-07 1994-11-15 Japan Steel Works Ltd:The 鍛造品の製造方法

Also Published As

Publication number Publication date
CZ301111B6 (cs) 2009-11-11
ATE396809T1 (de) 2008-06-15
DE10119839C2 (de) 2003-09-11
DE50212309D1 (de) 2008-07-10
EP1252947A3 (de) 2003-01-15
US6735996B2 (en) 2004-05-18
US20020157444A1 (en) 2002-10-31
DE10119839A1 (de) 2002-10-31
EP1252947A2 (de) 2002-10-30

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