| 摘要 |
A method and apparatus for manufacturing gears from a hollow blank wherein the blank is fed into an extrusion die having internal teeth, and wherein an extrusion force is applied to the blank by means of a sleeve surrounding a mandrel, the sleeve being adapted to apply an extrusion force to the blank thereby advancing the blank partially through the extrusion die, a final extrusion action being accomplished by the extrusion force transmitted to the blank by a following blank inserted into the die as the extrusion process is repeated.
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