| 摘要 |
<p>A method for producing a fully dense powder metal helical gear including placing powder metal in a perform die (10) wherein it can be compacted axially by punches (14, 15) to create a gear preform (40), having various gear profiles such as a helical profile, sintering the preform, and inserting the sintered preform into a hot forming die wherein it is impacted axially by punches to fully densify the gear preform. The densified gear can be inserted in a burnishing die where a more precise gear profile can be imparted resulting in more precise dimensions. Finishing treatments such as rolling, shaving, heat treating, machining to length and inner diameter sizing can be subsequently performed.</p> |
