Apparatus for producing threaded self-tapping stainless steel sc

Details Apparatus for producing threaded self-tapping stainless steel sc Apparatus for producing threaded self-tapping stainless steel sc

1979-01-08

1981-09-15

Combs, Ervin M.

Metal deforming

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

10 2, 72 88, 72342, 72700, B21H 306, B21K 156

Patent

active

042890063

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: 3314261 (1967-04-01), Grohoski et al.
patent: 3357868 (1967-12-01), Tanczyn
patent: 3376780 (1968-04-01), Tanczyn
patent: 3517402 (1970-06-01), Cohen
patent: 3528270 (1970-09-01), Byam
patent: 3924508 (1975-12-01), DeCaro
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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