发明名称 |
METHOD FOR PRODUCING A HOLLOW ENGINE VALVE |
摘要 |
The present invention provides a method for producing a hollow engine valve, with which the production process can be simplified and the processing precision can be improved. To this end, the present invention provides a method for producing a hollow engine valve (1) which is provided with a valve main body (10) in which a hollow hole (10c) is formed along a valve umbrella part (10a) and a hollow shaft part (10b), wherein a solid round bar (11) forming the material of the valve main body (10) is moulded to a semi-finished article (12) by means of a single hot-forging process, the semi-finished article (12) is subjected to rotary swaging whereby the semi-finished article (12) is moulded into a semi-finished article (13), the semi-finished article (13) is subjected to necking whereby the semi-finished article (13) is moulded into the valve main body (10), and a shaft end sealing member (20) is joined to the end part of the hollow shaft part (10b) of the valve main body (10) . |
申请公布号 |
EP2811126(A1) |
申请公布日期 |
2014.12.10 |
申请号 |
EP20130742918 |
申请日期 |
2013.01.21 |
申请人 |
MITSUBISHI HEAVY INDUSTRIES, LTD.;YOSHIMURA COMPANY |
发明人 |
MORII, HIROKAZU;HIRAO, KENICHIRO;NAKAMURA, KATSUMI;YOSHIMURA, HYOJI |
分类号 |
F01L3/14;B21K1/22;B23P15/00;F01L3/12;F01L3/20 |
主分类号 |
F01L3/14 |
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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