Throw away thread rolling die

Details Throw away thread rolling die Throw away thread rolling die

1994-11-14

1996-04-16

Crane, Daniel C.

Metal deforming

Tool and/or tool holder

Tool-comprising die plate having ribs and/or grooves

72 88, 761071, B21H 306

Patent

active

055071694

ABSTRACT:
A throw away thread rolling die comprising a thin sheet of high carbon steel with the upper and lower surfaces in a rectangular configuration and with short parallel side edges and long parallel upper and lower edges, the length of the upper and lower edges being greater than the length of the side edges; a plurality of parallel grooves, corresponding in size and shape to the screw threads or any other configuration to be formed, shaped into the upper surface of the rectangular sheet, the rectangular sheet having a thickness which is greater than the depth of the grooves, the grooves being formed parallel or angular from a longitudinal center line parallel with and midpoint of the upper and lower edges; two trapezoidal and two rectangular side pieces formed integral with the upper, lower and side edges of the rectangular sheet, the side pieces being bent downwardly away from the upper surface at an obtuse angle to form a generally trapezoidal open box-like member; and a solid blank of a low carbon steel material, the blank having a trapezoidal shape with an upper and side surfaces to receive in contact therewith the lower surface of the sheet and the side pieces.

REFERENCES:
patent: 2416094 (1947-02-01), Gray
patent: 3327569 (1967-06-01), Prutton
patent: 3558409 (1971-01-01), Querreiro
patent: 3650144 (1972-03-01), James

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