Process for setting a threaded torque-limited collar and pin joi

Details Process for setting a threaded torque-limited collar and pin joi Process for setting a threaded torque-limited collar and pin joi

1988-09-15

1989-11-21

Moon, Charlie T.

Metal working

Method of mechanical manufacture

Assembling or joining

29517, 29240, 292835, B21D 3900, B23P 1100

Patent

active

048813168

ABSTRACT:
Axially-extending troughs in a bark of an internally threaded collar receive setting balls of a driver that apply a torque to the collar through the balls bearing on the walls of the troughs. At a predetermined preload, the balls fail the bark and plow through it to develop circumferential furrows, and the torgue application on the collar ends. A second torquing which balls at a different axial position fails the bark again at the same pre-load to compensate for any relaxation after the first torque application.

REFERENCES:
patent: 3603132 (1971-09-01), Holmes
patent: 3842878 (1974-10-01), Duer
patent: 4215600 (1980-08-01), Kesselman
patent: 4260005 (1981-04-01), Stencel
patent: 4408936 (1983-11-01), Williamson
patent: 4601623 (1986-07-01), Wallace
patent: 4682520 (1987-07-01), Gray

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