Metal working – Method of mechanical manufacture – Gear making
Patent
1998-05-04
2000-04-04
Echols, P. W.
Metal working
Method of mechanical manufacture
Gear making
72377, B21H 104
Patent
active
060445556
ABSTRACT:
A method for producing a fully dense powdered metal helical gear can include the steps of placing powdered metal in a preform die wherein it can be compacted axially by rotating punches to create a helical gear preform. Next the preform can be sintered. The preform can then be heated to an appropriate temperature and inserted into a hot forming die wherein it can be impacted axially by a rotating punches to fully densify the helical gear preform. Next the densified helical gear can be inserted in a burnishing die where it can be forced through a helical profiled die cavity to impart more precise external dimensions. Process temperatures and impact forces can vary depending on the properties of the powdered metal and desired characteristics of the finished part. Secondary treatments, such as rolling, shaving, heat treating, chining to length and inner diameter sizing can be subsequently performed.
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Jacob Nedward A.
Muroski Jerome E.
Echols P. W.
Keystone Powered Metal Company
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