Title:
DEVICE FOR COLD ROLLING GEAR WITHOUT CORE
Document Type and Number:
Japanese Patent JPS52156154
Kind Code:
A
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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Inventors:
OREGU JINBAA
Application Number:
JP435577A
Publication Date:
December 26, 1977
Filing Date:
January 17, 1977
Export Citation:
Assignee:
SOUTHWESTERN IND INC
International Classes:
B21H5/00; B21H5/02; (IPC1-7): B21H5/02