US20070277579A1 - Method And Tool For Closed Die Forging - Google Patents

Method And Tool For Closed Die Forging Download PDF

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Publication number
US20070277579A1
US20070277579A1 US10/588,977 US58897705A US2007277579A1 US 20070277579 A1 US20070277579 A1 US 20070277579A1 US 58897705 A US58897705 A US 58897705A US 2007277579 A1 US2007277579 A1 US 2007277579A1
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United States
Prior art keywords
blank
members
tool
side members
centre
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Abandoned
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US10/588,977
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English (en)
Inventor
Trygve Ruste
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Raufoss Technology AS
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Individual
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Assigned to RAUFOSS TECHNOLOGY AS reassignment RAUFOSS TECHNOLOGY AS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RUSTE, TRYGVE
Publication of US20070277579A1 publication Critical patent/US20070277579A1/en
Abandoned legal-status Critical Current

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    • 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

Definitions

  • the present invention relates to closed die forging in general and in particular the forging of wheel suspension safety elements in aluminium, for the automobile industry.
  • the common method for closed die forging aluminium is inherited from classical steel forging.
  • Two dies are mounted in a press, and are pressed vertically against each other impressing their form on a blank that lies there between.
  • Each die includes a negative half imprint of the form of the finished product milled into the die material; the dimension of the imprint being corrected for the temperature of the blank and die tool.
  • a brake surface is milled along the rim of each half form. When the die tools are pressed against each other to the end position, these brake surfaces form a gap or gutter of minimum 3 mm.
  • the forge process is “kneading” the material, and properly executed it will provide a high strength aluminium alloy with very high endurance strength.
  • forging is particularly suited for highly stressed components, e.g. in the wheel suspension of a car.
  • the press force requirements are large. At the end of the press stroke, a large total working area (the surface of the product in addition to the area of the gutters) must be put under sufficient pressure to get the material flowing out of the gap between the dies.
  • Another object is to provide a method and tool for closed die forging which requires less press force.
  • Still another object is to provide a closed die forging method and tool in which large horizontal flow of material is avoided, thus making the requirements on lubrication less stringent.
  • Yet still another object is to provide a method and tool for closed die forging in which the blank is more or less self centring in the press.
  • the method includes closed die forging a product from a preform blank of a forgeable material by placing the blank in a press tool, said press tool including a number of centre and side members surrounding the blank, closing the press tool upon the blank, and forging the blank with short horizontal and vertical movements of the tool avoiding large horizontal movements in the material.
  • the tool for forging a blank into a product according to the method in claim 1 includes a number of upper ( 21 ) and lower ( 22 ) centre members, and first ( 23 , 24 ) and second ( 25 , 26 ) side members, said first ( 23 , 24 ) and second ( 25 , 26 ) side members enclosing said upper ( 21 ) and lower ( 22 ) centre members defining a closed cavity with the form of product.
  • FIG. 1 is an illustration of a classical forge process according to prior art, shown in four subsequent steps,
  • FIG. 2 is an illustration of the inventive forge process, shown in three individual steps,
  • FIG. 3A -C shows details of the inventive forge process
  • FIG. 4 shows a detail of the corresponding process of forging components of large width
  • FIG. 5 shows typical cross sections of components manufactured with the new process and the prior art process.
  • FIG. 1 The classical prior art forging process is illustrated in FIG. 1 .
  • a preform blank is placed between the dies of a press.
  • FIG. 1B When force is applied, FIG. 1B , the material in the blank will start to fill the form of the dies. Some material will flow horizontally out of the die tool.
  • FIG. 1C shows how this process continues as the die tool closes.
  • FIG. 1D At the end of the press stroke, FIG. 1D , the material of the blank fills the die form completely, with a rim of superfluous material protruding out of the gutter. In a subsequent step, this rim is removed.
  • the amount of material that must be removed can be equal to the weight of the finished article, i.e. 50% of the material in the preform blank is wasted.
  • a redesigned forge tool is used.
  • the tool includes an upper 21 and lower 22 centre member, and first 23 , 24 and second 25 , 26 side members.
  • Each side member consists of an upper part 23 , 25 and a lower part 24 , 26 .
  • the side members are equipped with a sloping outer surface.
  • Two press members 27 and 28 having mating sloping surfaces are acting on the side members. When moving the press members vertically, their movement is translated into a corresponding horizontal movement of the side members. In the horizontal plane, the forms of the inner surface of each side member will closely follow the forms of the upper and lower centre members. Thus, when the side members are brought completely together, the tool will form a closed unit. The whole assembly rests on a table 29 .
  • the blank 20 is placed between the centre members 21 , 22 clamping the blank in position. Then, the side members 23 , 24 and 25 , 26 are closed upon the blank.
  • the press members 27 , 28 are forced downwards until they butt against the table 29 . This results in a horizontal movement of the side members, which will upset the ends of the blank. The side members will close against the centre members. The material in the blank is pressed horizontally from the ends into the die form, which will become about 2 ⁇ 3 filled.
  • the centre members are forced together squeezing until the material has filled the rest of the form. This step is illustrated in FIG. 2C . Due to the small width of the centre members, a relatively small press force is required compared with the prior art forge method.
  • a small fixed brake gap may be employed, in the range of 0.5-1.0 mm.
  • the brake gap is mainly included in order to allow the form to be filled completely, while taking care of small differences in the volume of the blank.
  • the amount of waste material is negligible.
  • an additional step is needed for removing the rim of waste material.
  • the brake gap is dispensed with altogether.
  • the figures show only a detail of the tool.
  • FIG. 3A the tool has just been closed.
  • the side member includes no gutter, and is shaped like a blunt wedge. When force is applied this blunt wedge will engage the blank; the blank will become upset at the rim and start filling the cavity in a proper way, as illustrated in FIG. 3B .
  • FIG. 3B the horizontal movements have been completed.
  • the material in the blank has been upset at the rim, and now partially fills the cavity formed by the side members.
  • the upsetting action could start at any point along the blank, e.g. in the middle, preventing the material filling the cavity as it should.
  • FIG. 3C also the vertical movements have been completed.
  • the material from the blank now nearly completely fills the cavity. Only small interstices remain. Tolerances as to the volume of the blank will be taken care of by these voids.
  • the centre members In case the width of the product exceeds about 30 mm, the centre members must be divided into several sub-members, as illustrated in FIG. 4 .
  • the central part of the product will form ribs or a honeycomb pattern in order to achieve sufficient “kneading” without large horizontal movements of material during the second step of the forging process.
  • the figure shows a detail of the finished product.
  • FIG. 5 is shown typical sections from a broad component forged according to the classical method (right; rim of waste material removed), and according to the new inventive method (left).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Catalysts (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
US10/588,977 2004-02-12 2005-02-14 Method And Tool For Closed Die Forging Abandoned US20070277579A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO20040634 2004-02-12
NO20040634A NO324165B1 (no) 2004-02-12 2004-02-12 En smiprosess
PCT/NO2005/000054 WO2005077565A1 (en) 2004-02-12 2005-02-14 A method and tool for closed die forging

Publications (1)

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US20070277579A1 true US20070277579A1 (en) 2007-12-06

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US10/588,977 Abandoned US20070277579A1 (en) 2004-02-12 2005-02-14 Method And Tool For Closed Die Forging

Country Status (4)

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US (1) US20070277579A1 (de)
DE (1) DE112005000334T5 (de)
NO (1) NO324165B1 (de)
WO (1) WO2005077565A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102513486A (zh) * 2011-12-16 2012-06-27 陕西宏远航空锻造有限责任公司 一种钛合金锻件的模锻方法
US20130283877A1 (en) * 2012-04-26 2013-10-31 Kung Ying LAW Method and apparatus for progressively forging a hard disk drive base plate
US9522446B2 (en) 2014-08-27 2016-12-20 Cheung Woh Technologies Ltd. Method and apparatus for forming a hard disk drive base plate with an extended height
US10525522B2 (en) * 2017-07-28 2020-01-07 Nsk Ltd. Molding device for manufacturing cylindrical rolling body, manufacturing method for cylindrical rolling body, manufacturing method for rolling bearing, manufacturing method for vehicle, and manufacturing method for mechanical apparatus

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* Cited by examiner, † Cited by third party
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EP1900452B1 (de) * 2006-09-13 2012-05-30 Feintool Intellectual Property AG Verfahren zum Verstärken eines Wandbereichs von einem dreidmensionalen Beschlag
BRPI0701396B1 (pt) * 2007-02-06 2020-12-01 Dana Spicer Indústria E Comércio De Autopeças Ltda. matriz fechada para forjar peças irregulares
DE102017101570A1 (de) 2017-01-26 2018-07-26 Hirschvogel Umformtechnik Gmbh Geschmiedetes Flachprodukt
CN110328315B (zh) * 2019-08-19 2021-01-08 中北大学 无各向异性镁合金棒料的均匀镦粗方法
CN112756538B (zh) * 2021-02-26 2024-05-07 辽宁北祥重工机械制造有限公司 一种精钢石压力设备铰链梁锻造近净成型模具及成型方法

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US221372A (en) * 1879-11-04 Improvement in dies for thrashing-machine spikes
US1560135A (en) * 1919-03-07 1925-11-03 Edgewater Steel Forging die
US2744426A (en) * 1949-12-28 1956-05-08 Lyon George Albert Apparatus for coining metal parts
US2787828A (en) * 1951-08-28 1957-04-09 Ex Corp Method for producing finished articles directly from material blanks
US3680381A (en) * 1969-12-19 1972-08-01 Forges De Bologne Sa Method of and apparatus for forming parts with re-entrant surfaces
US3750450A (en) * 1970-06-26 1973-08-07 Gkn Sankey Ltd Manufacture of articles
US3825648A (en) * 1972-07-06 1974-07-23 Itt Forging of rigid crystalline plastics
US3845651A (en) * 1971-12-13 1974-11-05 J Vau Method and device for the precision shaping of a metal part
US4074559A (en) * 1975-11-25 1978-02-21 United Technologies Corporation Forging method
US4407056A (en) * 1978-04-07 1983-10-04 Nippon Steel Corporation Method and apparatus for manufacturing metal sections
JPS6330142A (ja) * 1986-07-22 1988-02-08 Musashi Seimitsu Ind Co Ltd ボ−ルスタツドの製造方法
JPS63199040A (ja) * 1987-02-13 1988-08-17 Mitsubishi Motors Corp 等速自在継手の内輪のプレス成形法
US5746085A (en) * 1995-06-30 1998-05-05 Hitachi, Ltd. Gear forming method
US5950481A (en) * 1993-12-17 1999-09-14 Wyman-Gordon Company, Inc. Stepped, segmented, closed-die forging
US6427326B1 (en) * 1999-06-17 2002-08-06 Honda Giken Kogyo Kabushiki Kaisha Method of manufacturing connecting rod

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH617368A5 (en) * 1977-05-06 1980-05-30 Supervis Ets Method for the production of a workpiece by extrusion, application of the method and an apparatus for carrying out the method

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US221372A (en) * 1879-11-04 Improvement in dies for thrashing-machine spikes
US1560135A (en) * 1919-03-07 1925-11-03 Edgewater Steel Forging die
US2744426A (en) * 1949-12-28 1956-05-08 Lyon George Albert Apparatus for coining metal parts
US2787828A (en) * 1951-08-28 1957-04-09 Ex Corp Method for producing finished articles directly from material blanks
US3680381A (en) * 1969-12-19 1972-08-01 Forges De Bologne Sa Method of and apparatus for forming parts with re-entrant surfaces
US3750450A (en) * 1970-06-26 1973-08-07 Gkn Sankey Ltd Manufacture of articles
US3845651A (en) * 1971-12-13 1974-11-05 J Vau Method and device for the precision shaping of a metal part
US3825648A (en) * 1972-07-06 1974-07-23 Itt Forging of rigid crystalline plastics
US4074559A (en) * 1975-11-25 1978-02-21 United Technologies Corporation Forging method
US4407056A (en) * 1978-04-07 1983-10-04 Nippon Steel Corporation Method and apparatus for manufacturing metal sections
JPS6330142A (ja) * 1986-07-22 1988-02-08 Musashi Seimitsu Ind Co Ltd ボ−ルスタツドの製造方法
JPS63199040A (ja) * 1987-02-13 1988-08-17 Mitsubishi Motors Corp 等速自在継手の内輪のプレス成形法
US5950481A (en) * 1993-12-17 1999-09-14 Wyman-Gordon Company, Inc. Stepped, segmented, closed-die forging
US5746085A (en) * 1995-06-30 1998-05-05 Hitachi, Ltd. Gear forming method
US6427326B1 (en) * 1999-06-17 2002-08-06 Honda Giken Kogyo Kabushiki Kaisha Method of manufacturing connecting rod

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102513486A (zh) * 2011-12-16 2012-06-27 陕西宏远航空锻造有限责任公司 一种钛合金锻件的模锻方法
US20130283877A1 (en) * 2012-04-26 2013-10-31 Kung Ying LAW Method and apparatus for progressively forging a hard disk drive base plate
US9481932B2 (en) * 2012-04-26 2016-11-01 Cheung Woh Technologies Ltd. Method and apparatus for progressively forging a hard disk drive base plate
US9522446B2 (en) 2014-08-27 2016-12-20 Cheung Woh Technologies Ltd. Method and apparatus for forming a hard disk drive base plate with an extended height
US10022826B2 (en) 2014-08-27 2018-07-17 Cheung Woh Technologies Ltd. Method and apparatus for forming a hard disk drive base plate with an extended height
US10525522B2 (en) * 2017-07-28 2020-01-07 Nsk Ltd. Molding device for manufacturing cylindrical rolling body, manufacturing method for cylindrical rolling body, manufacturing method for rolling bearing, manufacturing method for vehicle, and manufacturing method for mechanical apparatus

Also Published As

Publication number Publication date
NO324165B1 (no) 2007-09-03
DE112005000334T5 (de) 2007-01-18
NO20040634L (no) 2005-08-15
NO20040634D0 (no) 2004-02-12
WO2005077565A1 (en) 2005-08-25

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Owner name: RAUFOSS TECHNOLOGY AS, NORWAY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:RUSTE, TRYGVE;REEL/FRAME:019576/0052

Effective date: 20070329

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION