Flow drill for the provision of holes in sheet material

Details Flow drill for the provision of holes in sheet material Flow drill for the provision of holes in sheet material

1982-02-19

1984-06-19

Larson, Lowell A.

Metal deforming

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

With cutting of work or product

72325, B21D 2836

Patent

active

044547412

ABSTRACT:
A flow drill having a cross sectional contour defined by a complex harmonic curve symmetrical in the rotation direction permitting reverse of drill rotation.

REFERENCES:
patent: 3939683 (1976-02-01), van Geffen

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