Patent ID: 9713837
Date: 2017-07-25
CPC Classifications: B22C,B22D

Claim:
1. A water spot cooling device of a bottom mold for wheel hub casting, comprising: an annular spot cooling upper cover plate which comprises a clearance boss, a through hole located in the clearance boss, and a through hole used for bolt fastening; an annular spot cooling lower supporting plate, which is assembled with the annular spot cooling upper cover plate and comprises a backwater crossing, a backwater annular passage in fluid communication with the backwater crossing, a backwater opening in fluid communication with the backwater annular passage, an irregular-shaped through hole in fluid communication with the backwater crossing, and a stepped through hole used for bolt fastening; a water pipe in fluid communication with the irregular-shaped through hole; a backwater pipe in fluid communication with the backwater annular passage; and a water inlet branch pipe, which is sleeved on a linear through hole portion of the irregular-shaped through hole, penetrates through the through hole and is in fluid communication with the water pipe; and the irregular-shaped through hole has semi-cylindrical through hole portion and the linear through hole portion perpendicular to the curved surface of the semi-cylindrical through hole portion; the spot cooling upper cover plate and the spot cooling lower supporting plate are assembled by aligning the through hole with the stepped through hole through welding and fastening of a gasket and a screw, and in the assembled state, the through hole and the backwater crossing are in fluid communication; and the irregular-shaped through hole and the through hole are aligned.