Method of manufacturing scroll members for use in a rotary compressor
AssigneeKabushiki Kaisha Komatsu Seisakusho
InventorsHiroyuki Ando, Isamu Matsumoto
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Abstract
A method of manufacturing a scroll member for use in a rotary compressor has the steps of heating a material which has been preformed into a substantially frusta-conical body consisting of a flat upper surface portion provided with a cylindrical projection integrally formed in the center portion thereof and a lower surface portion having a conical surface and a flat projecting surface, and forging the material by a forging apparatus. The heating step compriss a first heating at a temperature in the range from 100.degree. to 200.degree. C. and a second heating at a temperature of 440.degree. C. which is carried out after coating the material with graphite, the coating being applied to the material between the first and the second heatings.
Claims5
A method of manufacturing a scroll member for use in a rotary compressor, comprising the steps of:
- heating a material which has been preformed into substantially frusta-conical body consisting of a flat upper surface portion having a cylindrical projection formed in the center portion thereof and consisting of a lower surface portion having a conical surface and a flat projecting bottom surface;
- and
- forging the material by a forging apparatus to apply a backward and forward extrusion to the material.
Dependencies are inferred from the claim text.