Process for producing connecting member shanks, such as hinges f

Details Process for producing connecting member shanks, such as hinges f Process for producing connecting member shanks, such as hinges f

1980-09-23

1983-07-19

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

72103, B21H 302

Patent

active

043936768

ABSTRACT:
A process of producing a threaded shank, particularly for hinges, characterized by comprising in a succession the following steps of: cutting from a continuous wire a stock or cylindrical starting piece substantially having the same volume as the self-threading shank to be obtained; pressing said cylindrical piece at high pressure, to form a blank composed of a possible head section which will remain smooth, and at least two successive cylindrical sections of different diameter, each of which corresponding to the average diameter of the screw thread to be obtained and interconnected by a "frusto-conical" section having a thread pattern; and threading by rolling said blank with the thread connecting section constituting a guide means and continuity thread between the sections of different diameter.

REFERENCES:
patent: 2232337 (1941-02-01), Meersteiner
patent: 2382019 (1945-08-01), Miller
patent: 2760388 (1956-08-01), Seibert
patent: 3520343 (1970-07-01), Evans
patent: 3538525 (1970-11-01), Dupont

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