Method and device for forming blanks for bearing rings

Details Method and device for forming blanks for bearing rings Method and device for forming blanks for bearing rings

B - Operations, Transporting

21

D

B21D 53/10 (2006.01) B21K 1/04 (2006.01)

Patent

CA 2263929

A separating/punching device which can simultaneously separate an outer and inner cylindrical portion of a cylindrical piece from each other and remove a bottom from the inner cylindrical portion by punching as a single step. A fixed die assembly includes a die having a setting hole, and a tubular fixed punch for separation having its tip inserted in the setting hole of the die. A movable die assembly movable toward and away from the fixed die assembly includes a tubular movable punch for separation which can fit around the tip of the fixed punch, and a punch mounted coaxially in the movable punch for punching out the bottom. With the cylindrical piece set in the setting hole so that the tip of the fixed punch is inserted in the outer cylindrical portion of the cylindrical piece, the movable die assembly is moved toward the fixed die assembly to separate the outer and inner cylindrical portion from each other with the fixed punch and the movable punch and simultaneously remove the bottom of the inner cylindrical portion with the punch.

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