发明名称 |
Method and apparatus for cold-working annular workpieces |
摘要 |
Disclosed is a method and apparatus for cold-working annular workpieces by applying thereto an internal fluid pressure to cause an enlargement of the diameter thereof through plastic deformation, in which the openings at opposite ends of an annular workpiece are closed by a pair of presser plates through packings which are radially expansible along with the annular workpiece. The contacting surface pressure of the packings and presser plates are controlled to a predetermined value by an arithmetic unit operating on detected values of a main pressure acting internally on the annular workpiece, an auxiliary pressure pressingly holding the presser plates against the respective packings and varitions in the shape of the annular workpiece undergoing the plastic deformation.
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申请公布号 |
US4364251(A) |
申请公布日期 |
1982.12.21 |
申请号 |
US19810224023 |
申请日期 |
1981.01.12 |
申请人 |
KOBE STEEL, LIMITED |
发明人 |
NISHIHARA, MASAO;FUKUI, YOSHINORI;KITAMURA, YOSHIO;KAMIKAWA, YOSHIYUKI;AZUMA, HARUKI |
分类号 |
B21D26/02;B21D26/041;(IPC1-7):B21D22/10 |
主分类号 |
B21D26/02 |
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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