Unitized drill steel and method of manufacturing

Details Unitized drill steel and method of manufacturing Unitized drill steel and method of manufacturing

1983-02-22

1984-06-12

Shedd, Wayne L.

Metal working

Method of mechanical manufacture

Assembling or joining

403279, 403282, B21D 3900, B23P 1100

Patent

active

044538545

ABSTRACT:
A drill steel and method of making a drill steel with an insert which provides a male insertion segment to form a joint with the female end of a drill steel. The insert is formed with a reduced end having an annular lip and can be utilized in a die forming process which forms the end of a drill steel around the insert in a one-step forming operation while at the same time enlarging the drill steel end to form a shoulder abutment.

REFERENCES:
patent: 1169642 (1916-01-01), Heeter et al.
patent: 2795039 (1957-06-01), Hutchins
patent: 4214358 (1980-07-01), Clerc
patent: 4299510 (1981-11-01), Emmerich et al.

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