METHOD AND TOOL FOR MANUFACTURING MASTER CYLINDER FOR BRAKE SYSTEM AND CYLINDER MANUFACTURED BY THEM

摘要

PROBLEM TO BE SOLVED: To manufacture a master cylinder for a brake system by cold forging. SOLUTION: In a method for manufacturing a master cylinder for a brake system, comprising a cylindrical main body, at least one flange integrally connected therewith, and a bore, extending in the cylindrical main body and through at least the flange, the master cylinder is manufactured by cold forging. Preferably, the flange is cold forged by upsetting. Subsequently, the cylindrical main body is provided with a bore. The bore is realized in a series of forging step, wherein at least the portion where the bore pierces the flange is executed in a separate step. COPYRIGHT: (C)2004,JPO