Apparatus and method for milling a trochoidal rotor

Details Apparatus and method for milling a trochoidal rotor Apparatus and method for milling a trochoidal rotor

1989-03-14

1990-03-27

Abrams, Neil

Turning

Pattern section

82 111, 409132, 409240, B23B 524, B23B 4104

Patent

active

049110438

ABSTRACT:
A device and method for milling a trochoidal rotor having a predetermined trochoidal configuration. The trochoidal rotor is used in a trochoidal rotary device in which working chambers are defined between the rotor and a housing. The rotor device has inlet and outlet ports for passing a fluid or gas. The rotor is made by first planetating a rotor blank having a predetermined width and having an edge region about a predetermined axis. The cutting blade is provided which has a predetermined geometry and which is located at a predetermined fixed distance from the axis. The cutting blade is engaged with at least a portion of the edge region of the rotor blank. The cutting blade traverses the edge region of the rotor blank to cut the edge region into a predetermined trochoidal configuration. When the cutting blade is a helical flute, the engagement of the cutting blade with a portion of the edge region results in cutting at a predetermined location within the portion of the edge region. This cutting location continuously sweeps back and forth in an axial direction across the portion of the edge region as a rotor blank rotates.

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F. J. Robinson et al., "Machining Trochoidal Profiles by Numerical Control", School of Engineering, Lakehead University, Thunder Bay, Ontario, Canada.

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