发明授权
- 专利标题： Apparatus for continuous production of spiral pipe
- 专利标题（中）： 连续生产螺旋管的设备
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申请号： US3776448D申请日： 1973-03-26
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公开(公告)号： US3776448A公开(公告)日： 1973-12-04
- 发明人: FAY J
- 申请人： FAY J
- 专利权人： J Fay
- 当前专利权人： J Fay
- 优先权： US10774871 1971-01-19; US34460773 1973-03-26
- 主分类号： B21C37/12
- IPC分类号： B21C37/12 ; B23K11/08 ; B23K33/00 ; B23K29/00
摘要：
A method and apparatus for continuously producing spiral pipe from sheet material including feeding a strip of the sheet material into a spiral pipe forming machine, continuously deforming a portion of the longitudinal edges of the sheet material so as to bend the edge downwardly toward the axis of the formed pipe and out of the normal plane of the sheet material, forming the sheet material into a spiral tube and bringing the deformed edges into parallel face to face abutting relationship, welding the edges into a seam, and reforming the deformed portion of the sheet material to provide a smooth forged weld.
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