Methods and apparatuses for forming by frictional heat and press

Details Methods and apparatuses for forming by frictional heat and press Methods and apparatuses for forming by frictional heat and press

1978-01-24

1979-11-27

Larson, Lowell A.

Metal deforming

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

With cutting of work or product

408130, 72443, B21D 2836

Patent

active

041754131

ABSTRACT:
A method of and an apparatus for forming by frictional heat and pressure a bossed hole in a metal plate or a tube wall with the aid of a rapidly rotating piercing tool, of which the axial feed is controlled, in such a manner, that during a predetermined time from the point of time, at which the tool comes into contact with the plate or tube wall the axial movement of the tool is slower and after that time said movement is faster than a movement of given speed.

REFERENCES:
patent: 2991551 (1961-07-01), Fogle et al.
patent: 3283618 (1966-11-01), Schatzman
patent: 3336821 (1967-08-01), Firth

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