Thread forming of sintered porous metal shapes

Details Thread forming of sintered porous metal shapes Thread forming of sintered porous metal shapes

B - Operations, Transporting

21

H

13/1, 75/162, 75

B21H 3/02 (2006.01) B22F 3/18 (2006.01) B22F 5/06 (2006.01)

Patent

CA 1165514

ABSTRACT OF THE DISCLOSURE A method of thread rolling a cylindrical sintered P/M blank is provided comprising, forming a sintered cylindrical powder metal P/M) blank of density ranging from about 75% to 32% of the actual density of said metal blank having a selected diameter larger than the final pitch diameter of a predetermined roll threaded product produced therefrom and not substantially exceeding the outside diameter of said predetermined roll threaded product. The P/M blank diameter selected is substan- tially inversely related to the density of the blank, the P/M diameter selected being correlated to produce a substantially full thread. The sintered P/M blank is then thread rolled using a threading die corresponding to the gage of the predeter- mined roll threaded product to be produced.

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