Method for machining spherical recess in compresser piston

Details Method for machining spherical recess in compresser piston Method for machining spherical recess in compresser piston

1998-02-09

2000-04-25

Howell, Daniel W.

Turning

Process of turning

2988804, 409132, 409143, B23B 300

Patent

active

060530812

ABSTRACT:
A method for machining a variable displacement compressor piston. The piston is connected to a swash plate by a pair of semi-spherical shoes. One end of the piston has a slot for receiving the swash plate. The slot includes a pair of opposed walls. Each wall has a concave spherical recess for supporting one of the shoes. When forming the recesses, a tool having an asymmetrical spherical cutter is placed between the slot walls in the piston. Then, the piston is rotated about a machining axis that is perpendicular to the axis of the piston and intersects the midpoint between the walls. Then, the tool is moved such that the center of the cutter is located on the rotation axis of the piston. This forms the recesses on the walls such that the recesses conform to a single sphere, the center of which is located on the axis of the piston.

REFERENCES:
patent: 3212405 (1965-10-01), Smith
patent: 3608407 (1971-09-01), Hitzemann
patent: 4116110 (1978-09-01), Dines
patent: 4625377 (1986-12-01), Kavthekar
patent: 5630353 (1997-05-01), Mittlefehldt et al.
patent: 5823721 (1998-10-01), Wagenseil

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