Fastener manufacturing method

Details Fastener manufacturing method Fastener manufacturing method

1975-03-03

1976-08-03

Larson, Lowell A.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With electromagnetic and/or electrostatic removal of...

10 10P, 118624, 219 76, B21H 302, B23G 900, B23K 904

Patent

active

039720845

ABSTRACT:
A method of manufacturing a threaded fastener of the self-tapping type is described, where the fastener has the conventional head, shank, and pilot end. The shank includes a helically wound thread member impregnated with a carbide or other, harder substance than the metal from which the fastener is made. A method of making a thread-cutting fastener having its pilot tip end impregnated, is also described. A method utilizing a thread-rolling machine with a unique impregnating electrode is disclosed. The electrode is shown to engage the fastener selectively during the thread-rolling operation itself.

REFERENCES:
patent: 3033705 (1962-05-01), Hanink et al.
patent: 3098150 (1963-07-01), Inoue
patent: 3129504 (1964-04-01), Ivan et al.
patent: 3524956 (1970-08-01), Rocklin
patent: 3552467 (1971-01-01), Bergere
patent: 3619545 (1971-11-01), Borden
patent: 3643722 (1972-02-01), Oestereicher
patent: 3743815 (1973-07-01), Woods
patent: 3763343 (1973-10-01), Rocklin

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