Browse Prior Art Database

Torsional Lock of Self Punch Sequence Swaged Apparatus

IP.com Disclosure Number: IPCOM000078026D
Original Publication Date: 1972-Oct-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Klaus, GF: AUTHOR [+2]

Abstract

The torsional rigidity of parts secured by the punch and clutch technique of U. S. Patent 3,571,903 may be enhanced by brazing or mechanically locking, either of which may be accomplished during the one step assembly taught in the patent.

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Torsional Lock of Self Punch Sequence Swaged Apparatus

The torsional rigidity of parts secured by the punch and clutch technique of
U. S. Patent 3,571,903 may be enhanced by brazing or mechanically locking, either of which may be accomplished during the one step assembly taught in the patent.

Brazing may be effected by copper plating surfaces 5 and 6, which will interface with the sheet stock 7 in the assembled condition. Copper plating the entire part 8 is particularly effective, where the assembly is subsequently to be case hardened and part 8 is to remain soft. Another method is to place paste- type brazing material in the annular recess defined by surface 6. A further alternative is to place a strip of copper film material 9 between part surface 10 and the sheet material 7. The annular ring of film material formed by the consecutive punching actions of edges 11 and 12 provides the brazing material. In each instance, the brazing action is completed by raising the completed assembly to a brazing temperature.

A mechanical lock can be imparted by offsetting the axis of cylindrical surface 5 from the common axis of the leading cylindrical portion 17 and part body 8. This offset, as shown by the distance between lines 15 and 16, cannot exceed half the difference in the diameters of cylindrical surface 5 and cylindrical surface
17.

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