发明名称 |
METHOD AND APPARATUS FOR TUBE GROOVING |
摘要 |
PROBLEM TO BE SOLVED: To easily and precisely form a groove in axial direction of a tube. SOLUTION: A mandrel is inserted into at least a section to be worked of a tube, and the tube and the mandrel are held so that they do not move relatively. The tube and a die are relatively moved in the axial direction so that the tube is inserted into the die. A plastic flow is caused in tube material by a protrusion part 7 protruded from the die 5 to form a groove in the axial direction of the tube on the surface of the tube. A working face 10 of a front edge of the protrusion part 7 is inclined to have a sweepback angle for a relative advancing direction as well as is formed to a projecting curved face in the relative advancing direction, the plastic flow of material is promoted in the center direction and peripheral direction of the tube.
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申请公布号 |
JP2001232423(A) |
申请公布日期 |
2001.08.28 |
申请号 |
JP20000046863 |
申请日期 |
2000.02.24 |
申请人 |
SANGO CO LTD |
发明人 |
WATABE TETSUYA;IRIE TORU;MORIKAWA AKINOBU |
分类号 |
B23P13/00;B21D17/00;(IPC1-7):B21D17/00 |
主分类号 |
B23P13/00 |
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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