EP0059038A2 - Procédé de fabrication d'objets lourds - Google Patents

Procédé de fabrication d'objets lourds Download PDF

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Publication number
EP0059038A2
EP0059038A2 EP82300597A EP82300597A EP0059038A2 EP 0059038 A2 EP0059038 A2 EP 0059038A2 EP 82300597 A EP82300597 A EP 82300597A EP 82300597 A EP82300597 A EP 82300597A EP 0059038 A2 EP0059038 A2 EP 0059038A2
Authority
EP
European Patent Office
Prior art keywords
blank
forging
press
toolset
shape
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Withdrawn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
EP82300597A
Other languages
German (de)
English (en)
Other versions
EP0059038A3 (fr
Inventor
John Arthur Richard Brookes
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.)
GKN Forgings Ltd
Original Assignee
GKN Forgings Ltd
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 GKN Forgings Ltd filed Critical GKN Forgings Ltd
Publication of EP0059038A2 publication Critical patent/EP0059038A2/fr
Publication of EP0059038A3 publication Critical patent/EP0059038A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
    • 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
    • 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

  • This invention relates to the production of heavy forged articles such as for example the front axle beams of heavy goods vehicles.
  • the nett weight of a heavy goods vehicle front axle beam may typically be in the range of 80 to 110 Kgs. dependent on the size of vehicle whilst the front axle beam of a medium van may be of the order of 20 Kgs. nett weight..
  • Such medium or heavy beams may be, and are conventionally, produced in a drop hammer forge from a steel billet but it is recognised that such drop forging has the disadvantages of poor reproducability of forging pressures, poor tolerances in the final product and the related production of excessive flash.
  • Press forging can minimise the disadvantages associated with drop forging but a press forge installation is an extremely expensive piece of equipment.
  • front axle beams can be produced on a press forge installation it is normally necessary to provide an 8,000 tonne press to produce a 20 to 45 Kg. nett weight axle beam whilst to produce a heavy goods vehicle axle beam of the order of 80 to 110 Kgs. nett weight it would be necessary to utilise a 14,000 tonne press.
  • a method of forging a steel article in a press forge wherein the forging pressure which would be necessary to deform the metal from a starting blank to the desired final shape in a single toolset of the press is greater than the rated maximum forging pressure of the press comprising the steps of taking a starting blank which has been partially shaped, subjecting the blank to a first pressing operation between closed dies of a first toolset wherein the dies act on only part of the blank to forge it to substantially its final shape and act on the remainder of the blank to forge it only to an intermediate shape and then subjecting the part-shaped blank to a second pressing operation between closed dies of a second toolset wherein the dies act on the substantially final shaped parts of the blank and the intermediate shaped parts of the blank to forge the blank to its desired final shape; the pressure exerted during each individual pressing operation being less than said rated maximum forging pressure of the press.
  • the starting blank is conveniently partially shaped from a billet by rolling and then by bending to the shape in which it is receivable in the first toolset of the press.
  • the article to be forged comprises an axle beam having, in its desired final shape, a centre section, a pair of spring pads, a pair of arms and a pair of king pin bosses; each of said pads, arms and bosses being positioned at each end of said centre section; the pressing steps comprising forging the pads, arms and bosses to substantially their final shape whilst forging the centre section to an intermediate shape in said first toolset and then forging the whole of the axle beam to its desired final shape in said second toolset.
  • a forging press having a certain rated maximum forging pressure may be utilised not only for the production of a weight of article for which the press is designed but also for the production of weights of articles which would normally be above those capable of being produced on such a press.
  • the invention permits, for example, an 8000 tonne forging press to be utilised for the production of a range of articles such as vehicle front axle beams through the 20 Kg. nett weight up to 110 Kgs.
  • the example of the use of the invention as described herein is with respect to the production of a heavy goods vehicle front axle beam, typically within a nett weight range of 80 Kgs. to 110 Kgs. on a forging press having a rated maximum forging pressure typically of 8000 tonnes and which is nominally designed for the production of press forged axle beams not exceeding 20 to 45 Kgs. nett weight.
  • the 80 Kg. to 110 Kgs. axle beam 10 is to be produced to the configuration illustrated in Figures 1 to 4 of the drawings having a maximum overall length of approximately 1800 mms. and a maximum overall depth approximating 100 mms.
  • the shape of the axle beam 10 is of course quite conventional and comprises a centre section 12 having, disposed at each end thereof, a spring pad 14, an arm 16 and a king pin boss 18.
  • an appropriately sized steel billet is first rolled to the preliminary starting blank shape 10a illustrated in Figure 5.
  • the amount of metal deformation occuring during the rolling operation is optimised to relate to the forging pressures necessary to be utilised . in the forging press during the final shaping operations and, as will be seen-from Figure 5, the rolling operation produces the preliminarily shaped blank 10a wherein more metal is present at those respective areas of the blank which are to be forged into the pads, arms and bosses than is present in the centre section.
  • This preliminary starting blank 10a is then introduced to the forging press and bent under a relatively light pressure to the starting blank shape 10b illustrated in Figures 6 and 7 of the drawings.
  • the metal is deformed during the bending operation to define the basic shaping of the spring pad, arm and king pin boss areas and this shape is such as to enable this starting blank to be receivable within the dies of the first toolset proper of the press.
  • the bottom die 20 of the first toolset is illustrated in Figure 8, the upper die being similarly and correspondingly shaped, and this toolset configuration is such as to enable substantially the final shape of the pads, arms and bosses to be forged during a first pressing operation whilst the centre section is forged only to an intermediate shape.
  • the metal deformation from the starting blank shape 10b to the part-shaped blank produced after the first pressing operation in the first toolset is achievable utilising a maximum of 85% of the rated maximum forging pressure of the press.
  • the part-shaped blank is then transferred to the second toolset, whose bottom die 22 is illustrated in Figure 9 of the drawings, and a second pressing operation is carried out to shape the spring pads 14 and the centre section 12 to their final shape whilst the flash gap in the areas which have been fully formed, i.e. the king pin bosses 18 and the arms 16, is increased in the second toolset to reduce to a minimum any additional pressure whilst the spring pads 14 and the centre section 12 are being fully formed; the forging pressure utilised during this second pressing operation also being less than the rated maximum forging pressure of the press.
EP82300597A 1981-02-24 1982-02-08 Procédé de fabrication d'objets lourds Withdrawn EP0059038A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8105768 1981-02-24
GB8105768A GB2094195B (en) 1981-02-24 1981-02-24 Forging heavy articles

Publications (2)

Publication Number Publication Date
EP0059038A2 true EP0059038A2 (fr) 1982-09-01
EP0059038A3 EP0059038A3 (fr) 1983-06-22

Family

ID=10519916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82300597A Withdrawn EP0059038A3 (fr) 1981-02-24 1982-02-08 Procédé de fabrication d'objets lourds

Country Status (4)

Country Link
EP (1) EP0059038A3 (fr)
JP (1) JPS57159231A (fr)
ES (1) ES8303140A1 (fr)
GB (1) GB2094195B (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002076652A1 (fr) * 2001-03-23 2002-10-03 Volvo Lastvagnar Ab Element de construction creux et son procede de production
WO2004108326A1 (fr) * 2003-06-06 2004-12-16 Volvo Lastvagnar Ab Procede de production d'elements de construction creux
US7726027B2 (en) 2003-06-06 2010-06-01 Volvo Lastvagnar Ab Method of manufacturing hollow structural elements
CN102699265A (zh) * 2011-04-15 2012-10-03 大连大高阀门股份有限公司 反作用杆接头生产模具及工艺
CN103100625A (zh) * 2011-11-09 2013-05-15 上海瑞尔实业有限公司 一种汽车底盘悬架系统扭转接头零件的精密锻造工艺
CN106623742A (zh) * 2016-06-17 2017-05-10 湖北三环车桥有限公司 一种高效的汽车镂空前轴锻造方法
CN106623741A (zh) * 2016-06-17 2017-05-10 湖北三环车桥有限公司 一种镂空汽车前轴的锻造方法
CN107282840A (zh) * 2017-06-21 2017-10-24 桂林福达重工锻造有限公司 一种能实现前轴锻件切边和双向精整形的模具
CN110494233A (zh) * 2017-04-05 2019-11-22 日本制铁株式会社 前桥梁及其制造方法
CN110545933A (zh) * 2017-04-05 2019-12-06 日本制铁株式会社 前桥梁及其制造方法
CN112001082A (zh) * 2020-08-25 2020-11-27 上海理工大学 一种工字梁前桥轻量化方法
CN112846029A (zh) * 2020-12-18 2021-05-28 桂林福达重工锻造有限公司 一种采用u形展宽预成形结构的前轴压弯预成形工艺
CN113617999A (zh) * 2021-03-02 2021-11-09 天津重型装备工程研究有限公司 一种饼类锻件的体外锻造方法
US11479060B2 (en) * 2018-03-07 2022-10-25 Isuzu Motors Limited Axle beam

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0647137B2 (ja) * 1989-02-14 1994-06-22 株式会社月星製作所 ト−ションバ−の製造方法
CN104959503B (zh) * 2015-05-23 2016-08-24 锦州捷通铁路机械制造有限公司 现代轨道低地板动车大型整体锻造轴桥的制备工艺

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB111090A (en) * 1916-11-01 1918-07-11 George Crompton Gordon Improvements in Methods of Making Counterbalanced Crank-shafts.
GB772724A (en) * 1953-10-19 1957-04-17 Benjamin Edward Hood Improvements in methods of forging railway axles

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB111090A (en) * 1916-11-01 1918-07-11 George Crompton Gordon Improvements in Methods of Making Counterbalanced Crank-shafts.
GB772724A (en) * 1953-10-19 1957-04-17 Benjamin Edward Hood Improvements in methods of forging railway axles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WERKSTATT UND BETRIEB, vol. 107, no. 10, 1974, pages 595-598, Carl Hanser Verlag, M}nchen (DE); *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002076652A1 (fr) * 2001-03-23 2002-10-03 Volvo Lastvagnar Ab Element de construction creux et son procede de production
WO2004108326A1 (fr) * 2003-06-06 2004-12-16 Volvo Lastvagnar Ab Procede de production d'elements de construction creux
US7726027B2 (en) 2003-06-06 2010-06-01 Volvo Lastvagnar Ab Method of manufacturing hollow structural elements
CN102699265A (zh) * 2011-04-15 2012-10-03 大连大高阀门股份有限公司 反作用杆接头生产模具及工艺
CN103100625A (zh) * 2011-11-09 2013-05-15 上海瑞尔实业有限公司 一种汽车底盘悬架系统扭转接头零件的精密锻造工艺
CN103100625B (zh) * 2011-11-09 2015-03-11 上海瑞尔实业有限公司 一种汽车底盘悬架系统扭转接头零件的精密锻造工艺
CN106623742A (zh) * 2016-06-17 2017-05-10 湖北三环车桥有限公司 一种高效的汽车镂空前轴锻造方法
CN106623741A (zh) * 2016-06-17 2017-05-10 湖北三环车桥有限公司 一种镂空汽车前轴的锻造方法
CN110545933A (zh) * 2017-04-05 2019-12-06 日本制铁株式会社 前桥梁及其制造方法
CN110494233A (zh) * 2017-04-05 2019-11-22 日本制铁株式会社 前桥梁及其制造方法
CN107282840A (zh) * 2017-06-21 2017-10-24 桂林福达重工锻造有限公司 一种能实现前轴锻件切边和双向精整形的模具
US11479060B2 (en) * 2018-03-07 2022-10-25 Isuzu Motors Limited Axle beam
CN112001082A (zh) * 2020-08-25 2020-11-27 上海理工大学 一种工字梁前桥轻量化方法
CN112001082B (zh) * 2020-08-25 2021-04-16 上海理工大学 一种工字梁前桥轻量化方法
CN112846029A (zh) * 2020-12-18 2021-05-28 桂林福达重工锻造有限公司 一种采用u形展宽预成形结构的前轴压弯预成形工艺
CN113617999A (zh) * 2021-03-02 2021-11-09 天津重型装备工程研究有限公司 一种饼类锻件的体外锻造方法
CN113617999B (zh) * 2021-03-02 2023-06-20 天津重型装备工程研究有限公司 一种饼类锻件的体外锻造方法

Also Published As

Publication number Publication date
GB2094195B (en) 1984-08-22
GB2094195A (en) 1982-09-15
ES509824A0 (es) 1983-02-01
EP0059038A3 (fr) 1983-06-22
JPS57159231A (en) 1982-10-01
ES8303140A1 (es) 1983-02-01

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Owner name: GKN FORGINGS LIMITED

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Inventor name: BROOKES, JOHN ARTHUR RICHARD