发明名称 |
METHOD OF STAMPING AND PIERCING A TUBE |
摘要 |
<p>A method for piercing a tube during liquid impact forming or hydroforming to form a hole with minimal deformation in the material surrounding the hole. T he method includes the steps of: (1) filling the tube with liquid; (2) stamping the tu be thereby increasing the pressure of the liquid within the tube; (3) piercing the tube while the pressure is elevated with a tapered punch whereby the material around the pierced hole is pushed back toward the die wall due to the elevated internal pressure of the tube; and (4) retracti ng the tapered punch from the tube with the face of the punch catching on the tube wall to pull t he material back toward the die wall.</p> |
申请公布号 |
CA2452168(A1) |
申请公布日期 |
2003.12.24 |
申请号 |
CA20022452168 |
申请日期 |
2002.10.03 |
申请人 |
GREENVILLE TOOL & DIE COMPANY |
发明人 |
ASH, STANLEY P.;BUSH, THEODORE L.;HARTWAY, DALE A. |
分类号 |
B21D26/035;B21D28/28;(IPC1-7):B21D28/28;B21D26/02 |
主分类号 |
B21D26/035 |
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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