Metal deforming – By pulling workpiece through closed periphery die – Utilizing plural metal-deforming tools
Patent
1982-09-17
1985-05-07
Crane, Daniel C.
Metal deforming
By pulling workpiece through closed periphery die
Utilizing plural metal-deforming tools
72274, B21C 100, B21C 300
Patent
active
045150001
ABSTRACT:
A method is disclosed for preparing consumable insert rings for use in welding of conduit and the like, which utilizes a drawing operation. Particularly, a ring having a multiple gauge configuration is drawn by a process whereby the first drawing pass achieves 80 to 90% preparation of the final cross-sectional configuration. The drawing operation may be conducted at speeds of about 1' per minute, and final dimensions and shape of the inserts may be achieved by as few as two drawing passes. Surface uniformity is achieved and work hardening of the insert during formation is minimal. Starting stock utilized in the present method may be of lesser diameter than that used in conventional processes.
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patent: 3955390 (1976-05-01), Geary
Adam, Alastair T., Wire-Drawing and the Cold Working of Steel, Witherby, H.F. & G., London, 1925, pp. 55, 56.
Van Vlack, Lawrence H., Elements of Materials Science, Addison-Wesley Publishing Co., Reading, Mass., 1967, p. 411, Appendix C.
Bobis Daniel H.
Crane Daniel C.
Jackson David A.
Robvon Backing Ring Company
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