Method and apparatus for manufacturing a constant velocity joint

Details Method and apparatus for manufacturing a constant velocity joint Method and apparatus for manufacturing a constant velocity joint

1988-09-09

1991-03-26

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

With stripping or ejecting from tool

723534, B21J 1302

Patent

active

050019201

ABSTRACT:
A method and apparatus for manufacturing a product such as a constant velocity joint having a recess whose opening has a lesser diameter than its interior, by ironing a workpiece supplied to working parts of punches which workpiece is pre-formed into a hollow structure whose opening has an excess of metal required to be ironed. A group of punches are mounted in a loop around a punch guide for relative axial movement. The group of punches includes a set of first punches and a set of second punches, disposed alternately. Each punch has a working part at an upper end thereof and the working parts are closely assembled in a closed loop at the time of the forming process. Each punch is formed with a groove in a side which is slidable along the punch guide. The grooves in the first punches are different in length from those in the second punches. After the workpiece is supplied to the working parts of the punches and ironed to narrow the diameter of the opening relative to the interior of the recess, the punches are moved upwardly relative to the punch guide to narrow firstly the outer diameter of the working parts of the set of first punches and secondly the outer diameter of the working parts of the set of second punches and pull up the formed workpiece from the punches.

REFERENCES:
patent: 4610155 (1986-09-01), Langford et al.

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