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公开(公告)号:US5379626A
公开(公告)日:1995-01-10
申请号:US127807
申请日:1993-09-28
申请人: Nobuo Hara , Makoto Nagaya
发明人: Nobuo Hara , Makoto Nagaya
CPC分类号: F01L1/143 , F01L2103/00 , F02B2275/18 , Y10T29/49304
摘要: To manufacture an Al alloy tappet in an internal combustion engine, an intermediate which has a circular upper wall and a cylindrical skirt is formed in the first forging step. In the second forging step, a recess is formed on the lower surface of the upper wall. Relatively large-sized metallic structure in the first forging step is finally collapsed, thereby increasing strength and rigidity of the upper wall around the recess.
摘要翻译: 为了在内燃机中制造Al合金挺杆,在第一锻造步骤中形成具有圆形上壁和圆筒形裙部的中间体。 在第二锻造工序中,在上壁的下表面形成有凹部。 在第一锻造步骤中相对大的金属结构最终被折叠,从而增加了围绕凹槽的上壁的强度和刚性。