Metal deforming – Tool and/or tool holder – Having unitary tool-face
Patent
1986-10-27
1988-04-19
Spruill, Robert L.
Metal deforming
Tool and/or tool holder
Having unitary tool-face
72462, 279 41R, 279 93, 279 46R, B21D 3704
Patent
active
047381302
ABSTRACT:
A structure for mounting mandrels in a tube expanding apparatus comprising a horizontal mounting plate fixed to the underside of a vertically movable slide and having a plurality of passage holes through which the mandrels suspendingly extend. The structure comprising a cylindrical holder non-fixedly provided on the mounting plate above each passage hole and having an internal gripping space for holding an upper region of each mandrel. The holder comprising a pair of cylinder halves movable toward and away from each other. A contractive rubber ring being fitted around the holder to force the cylinder halves toward each other into a joined state. The upper region of the mandrel being provided with a diametrically reduced, eccentric portion surrounded by an engaging groove. With one of the cylinder halves being internally formed with an arcuate projection which is selectively engageable with and disengageable from the engaging groove in response to the rotation of the mandrel relative to the holder.
REFERENCES:
patent: 2219907 (1940-10-01), Ross
patent: 3384386 (1968-05-01), Ward et al.
patent: 3916758 (1975-11-01), Ashbrook
patent: 4669742 (1987-06-01), Broszukat
Jones David B.
Kyoshin Kogyo Kabushiki Kaisha
Spruill Robert L.
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