Method of making lobular internally and externally threaded...

Details Method of making lobular internally and externally threaded... Method of making lobular internally and externally threaded...

B - Operations, Transporting

21

D

10/22

B21D 53/24 (2006.01) B21H 3/04 (2006.01) B21H 3/08 (2006.01)

Patent

CA 1085109

Method of Making Lobular Intern- ally and Externally Threaded Insert ABSTRACT OF THE DISCLOSURE The present invention relates to an improved method for economically manufacturing lobular internally and ex- ternally threaded self-tapping inserts. The method is characterized by the novel application of a conventional roll forming apparatus of the type including two cylindrical driven thread forming dies in combination with a specially configured lobular elongated stock material, resulting in the provision of a multiplicity of longitudinally spaced- apart, externally threaded increments which may thereafter sequentially be drilled, tapped and severed from the stock material.

325435

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