COMPRESSOR HOUSING FOR SUPERCHARGER AND PRODUCTION METHOD FOR SAME

摘要

A compressor housing 1 is provided with a scroll piece 2 that includes a cylindrical intake port forming section 21 that forms an intake port 11, a scroll wall surface forming section 22 that forms an air-intake side wall surface of a discharge scroll chamber 12, and a scroll outer circumferential section 23 that covers an outer circumferential side of the discharge scroll chamber 12; a shroud piece 3 that includes a cylindrical shroud press fitted section 31 press fitted into the intake port forming section 21, and a shroud wall surface forming section 32 that forms an inner circumferential side wall surface of the discharge scroll chamber 12 and also forms a shroud surface 321 that opposes an impeller 5 and a diffuser surface 322; and an outer circumferential annular piece 4 that includes an outer circumferential annular press fitted section 41 that is press fitted inside the scroll outer circumferential section 23, and an outer circumferential annular wall surface forming section 42 that forms an outer circumferential side wall surface of the discharge scroll chamber 12.