ELECTROMAGNETIC CLUTCH, COMPRESSOR, AND MANUFACTURING METHOD FOR ELECTROMAGNETIC CLUTCH

摘要

When grooves (44, 45A, 45B) of an armature (42) and a rotor (43) are formed by laser machining, a metal oxide layer (100) is formed on a wall surface which defines the grooves (44, 45A, 45B). The metal oxide layer (100) is brought into sliding contact with a first contact surface (A1) to a fourth contact surface (A4) during use of the electromagnetic clutch, so that a part of the metal oxide layer (100) is ground or separated whereby particles composed of a metal oxide are generated. The particles enter a contact surface between the armature (42) and the rotor (43), so that the friction force therebetween is increased to thereby prevent slippage. As a result, the torque transmission capability of the electromagnetic clutch (M) is enhanced and the increase of the torque of a scroll compressor is achieved.