Deep-drawing tool for forming an orifice with a truncated end in

Details Deep-drawing tool for forming an orifice with a truncated end in Deep-drawing tool for forming an orifice with a truncated end in

1998-05-15

1999-07-27

Crane, Daniel C.

Metal deforming

With cutting

By shearing tool-couple

72470, B21D 2834

Patent

active

059271370

ABSTRACT:
A tool for shaping, by deep drawing, a truncatedly ending round orifice in a metallic strip material, viz. for manufacturing a faceplate for a locking fitting or the like, includes both a punch and a die. The punch includes a cylindrical portion forming the extension of a truncated portion, whereas the die includes a bore with a cross-section adjusted to that of the cylindrical portion of the punch, this bore having, at the level of its wall, at least a groove ending at the upper face of this die, in front of the strip material to be shaped, into this or these grooves escaping the material during deep drawing of the truncated end.

REFERENCES:
patent: 3108371 (1963-10-01), Munse
patent: 3245465 (1966-04-01), Young
patent: 3878950 (1975-04-01), Quinn

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