Method for forming scroll members used in a scroll type fluid ma

Details Method for forming scroll members used in a scroll type fluid ma Method for forming scroll members used in a scroll type fluid ma

1986-02-26

1987-09-29

Goldberg, Howard N.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

291568B, 29557, 29DIG26, B23P 1500

Patent

active

046960848

ABSTRACT:
A scroll type fluid machine comprising a pair of mutually engaged scroll members each including a side plate and a spiral lap uprightly disposed on an inside surface of the side plate; when the scroll members are relatively revolved in solar motion relationship, a fluid volume in sealed chambers defined by the pair of engaged scroll members being varied, so that a pressure of the fluid in the sealed chambers is thereby varied in order to discharge a gas therefrom, characterized by constituting so that stress may not concentrate at stress concentration portions of the scroll members, i.e., at corners of inner end base portions of the laps and the inside surfaces of the side plates in an eddy center section of the scroll members; and a method for forming the scroll members which permit improving productivity, characterized by forming, at the stress concentration portion of each scroll member, a round having a relatively large curvature radius which is enough to provide it with fatigue strength, and then finishing a relatively small round by means of a cutter for finish working.

REFERENCES:
patent: 4512066 (1985-04-01), McCullough
patent: 4566166 (1986-01-01), Donelson
patent: 4609334 (1986-09-01), Muir et al.
patent: 4615091 (1986-10-01), Niwz et al.
Mechanical Engineering Manual, Publishing House of the Chinese Mechanical Industry; pp. 19-156 to 157 and pp. 20-47 to 49.

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