Self-tapping stainless steel screw and method for producing same

Details Self-tapping stainless steel screw and method for producing same Self-tapping stainless steel screw and method for producing same

1979-01-08

1981-10-20

Combs, Ervin M.

Metal deforming

With exposure of work to gas, vapor, mist, or modified...

10 10R, 72 88, 72364, 72700, 148125, 411411, B21H 306, B21K 156

Patent

active

042953510

ABSTRACT:
A process for producing self-tapping screws from an austenitic 300 series stainless steel material wherein a blank of such material is chilled prior to a thread rolling operation so that the threads are formed while the blank is in a chilled condition. A preferred apparatus for practicing such a method utilizes an insulated tunnel surrounding the feed track which leads to the thread roller. Fluid refrigerant is fed to the interior of the tunnel to chill the blanks immediately prior to the thread rolling operation.

REFERENCES:
patent: 3357868 (1967-12-01), Tanczyn
patent: 3376780 (1968-04-01), Tanczyn
patent: 3517402 (1970-06-01), Cohen
patent: 3924508 (1975-12-01), De Caro
patent: 4042421 (1977-08-01), Van den Sype et al.
patent: 4042423 (1977-08-01), Van den Sype et al.
patent: 4083220 (1978-04-01), Kobayashi et al.

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