Machines for centerless cold rolling of gears

Details Machines for centerless cold rolling of gears Machines for centerless cold rolling of gears

B - Operations, Transporting

21

H

80/28

B21H 5/02 (2006.01)

Patent

CA 1057089

Abstract A centerless gear forming tool for cold rolling teeth on a gear blank in which the blank is inserted between a pair of gear forming rolls which are movable toward and away from each other. The rolls are urged toward each other by a spring, clamping the blank between them and are caused to rotate synchronously in the same direction. The gear rollers have lugs forming opposing surfaces which engage the blank when the gear rolls are rotated to an initial position. A latch initially holds the rolls apart so that the blank can be inserted between the rolls and clamped in position by rotating the opposing lugs into engagement with the blank. The latch is then released causing the blank to be also clamped between the rolls. Subsequent rotation of the rolls in the direction to move the lugs away from the blank operates to cold form the teeth in the blank under the pressure of the spring.

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