Method of processing screw rotor

Details Method of processing screw rotor Method of processing screw rotor

1996-10-07

1998-09-15

Cuda, Irene

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

295274, B23P 1500

Patent

active

058061827

ABSTRACT:
A cast screw rotor has an opened lightening or reduced weight hole formed inside each thread portion. The opened hole is formed along torsion of the thread portion, and a shaft is inserted into an axial hole. The screw rotor is manufactured by a method in which each of the thread portions and the axial hole are formed on the basis of the reduced weight hole.

REFERENCES:
patent: 4109362 (1978-08-01), Ingalls
patent: 4909337 (1990-03-01), Kochnev
patent: 5377407 (1995-01-01), Takahashi et al.
patent: 5638600 (1997-06-01), Rao et al.

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