B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
113/66
B21D 22/20 (2006.01) B21D 37/00 (2006.01) B21J 5/12 (2006.01) B21J 13/02 (2006.01) B21K 1/76 (2006.01)
Patent
CA 1062089
ABSTRACT OF DISCLOSURE Apparatus is described for cold forming cylindrical metal blanks into parts having a central body and radial extensions, such as universal joint spiders and constant velocity universal joint tripod members. Die sectors of shortened axial height in their radial forming and extru- sion zone are mounted for quick fastening and release, for example by dovetail connections to die carriers which are in turn mounted on rams displaceable along inclined converging slideways. Guide bushes are provided at the entrance to the through cavity corresponding to the central body and guide a cylindrical blank along the axes of coaxial punches fixed respectively to the plunger and column on the table for restraining plastic flow of blank metal towards the central cavity and then to the radial cavities.
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