Broach pulling mechanism
AssigneeThe Babcock & Wilcox Company
InventorJames W. Dopp
Life of this patent
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Abstract
A broach pulling mechanism is provided utilizing puller jaws which engage with a significantly larger circumferential groove at the end of the broach to pull the broach through a workpiece without any vertical drop of the broach in the puller mechanism during any part of the broaching operation. To accomplish this a piston assembly is mounted at the bottom of the broach pulling mechanism to allow the end of the broach to bottom thereon. The piston assembly is controllably pressurized to lock a wall of the groove of the broach end between the puller jaws and the piston assembly thereby preventing any movement or dropping of the broach due to a loose fit of the jaws with respect to the groove throughout the entire broaching operation.
Claims6
A puller mechanism for pulling a broach through a workpiece comprising:
- a support for mounting a workpiece thereon;
- a broach having a circumferential groove near the end thereof mounted with respect to said support to be movable through the workpiece;
- and
- broach pulling means movably mounted with respect to said support including a series of movable puller jaws and further including piston means located in said broach pulling means and axially spaced from said puller jaws to support said broach in a position which aligns the circumferential groove of said broach with respect to the puller jaws when said broach is initially inserted into said broach pulling means and means for actuating said piston means axially toward said jaws to clamp the end of said broach between said puller jaws and said piston means whenever said jaws are moved into said circumferential groove of the broach to allow the broach to be pulled through the workpiece without any drop of the broach with respect to the broach pulling means during any part of the movement of the broach through the workpiece.
Dependencies are inferred from the claim text.