Forming engagement grooves in a tool shank

Details Forming engagement grooves in a tool shank Forming engagement grooves in a tool shank

1981-04-23

1983-06-28

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

72358, 72401, B21D 2200

Patent

active

043898700

ABSTRACT:
In the formation of engagement grooves in the shank of a tool for use in a hammer drill or chipping hammer, a matrix or die is divided along a junction plane into two matrix halves. A bore for holding the tool to be punched is formed along the junction plane so that the plane divides the bore in half in its axial direction. Guide openings are formed in the opposite sides of the matrix extending into the bore for receiving punching dies. The matrix halves combine to form these guide openings which are located in the junction plane so that the punching pressure is applied in this plane. The closing pressure for holding the matrix halves together is applied at right angles to the junction plane.

REFERENCES:
patent: 2006283 (1935-06-01), Staempfle
patent: 2302115 (1942-11-01), Gazey
patent: 3637225 (1972-01-01), Schmuck

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