JPS558302A - Manufacture of rotor pulley included in electro-magnetic clutch brake - Google Patents

Abstract

PURPOSE: To shorten the process for manufacturing the rotor pulley and to reduce the material consumption, by plastically working the outermost ring type wall of the ring type body provided with concentric ring type walls formed by plastic working, to form the V-groove in one body with the rotor's main body.

CONSTITUTION: By forging and annealing the round steel bar, the ring type wall 15, in which the concentric ring type walls 16, 17, 18, are connected at the bottom 19 into one body, is formed. The inner bottom plane 21a of the ring type groove 21 between the ring type walls 17, 18, is inclined correspondingly to the groove angle of the pulley. The root of the ring type wall 18 is pressed tight against the inner bottom plane 21a of the ring type groove 21 using the thread rolling roller, etc., upon the ring type wall 18; hereby, the V-groove is formed. This V-groove is finished by the thread rolling roller and the drawing die into the V-groove of the specified breadth. Next, a long hole 11 is bored in the bottom 19 facing to the ring type groove 20 by the press work; after that, the cutting of the inner circumferential plane 16a of the ring type wall 16, the cutting of the end parts of the ring type walls 16, 17, and the grinding of the outer surface of the bottom plane 19, are successively worked resulting in the finished product, rotor pulley 28.

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