发明名称 |
METAL FORGED PRODUCT UPPER OR LOWER ARM PREFORM OF THE ARM PRODUCTION METHOD FOR THE METAL FORGED PRODUCT FORGING DIE AND METAL FORGED PRODUCT PRODUCTION SYSTEM |
摘要 |
A method for producing a metal forged product having a plurality of branches includes a preliminary forging step of forming a preform by closed forging from a cylindrical material having a surface layer (302) on a circumferential surface thereof such that the surface layer is contained in a surface region of the preform; an intermediate forging step of subjecting the preform to forging to thereby extrude the surface layer in the form of flash outside a periphery of a forged product corresponding to a target product; a final forging step of forging the forged product into a product assuming a target product shape; and a flash removal step of removing the flash containing the surface layer from the product assuming a target product shape to thereby produce a target forged product. The forged product is enhanced in mechanical characteristics and has no flash removal mark.
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申请公布号 |
WO2004073903(A8) |
申请公布日期 |
2005.01.13 |
申请号 |
WO2004JP01837 |
申请日期 |
2004.02.18 |
申请人 |
SHOWA DENKO K.K.;NAKAHARA, TAKAFUMI;AKIYAMA, MITSUHARU |
发明人 |
NAKAHARA, TAKAFUMI;AKIYAMA, MITSUHARU |
分类号 |
B21J5/02;B21K1/12;B21K1/74;B21K1/76;B21K3/00;(IPC1-7):B21J5/02;B21J13/02;B21K1/14 |
主分类号 |
B21J5/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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