Warm Press Shaving of Gear Parts
Warm press shaving has been proposed here to obtain smooth cut products from thick steel sheet, where a near net shape blank is heated upto an appropriate temperature around 800°C and then shaved by press. The allowable depth of cut in shaving is enlarged very much as compared to that in the conventional cold shaving at room temperature and precision machine parts, which can not be produced by fine blanking, can be manufactured from the thicker steel sheet and wider range of steel. It was confirmed in the laboratory experiment that the thick gear part(module 3mm) of 0. 45$ carbon steel with 10 mm thickness could be successfully produced by this press shaving. Technical problems accompanying the shaving process such as the preparation of near net shaped blank from sheet or forged steel and the setting alignment of the blank could be solved by the adoption of “double-stage dies”, which makes blanking and shaving process possible in single stroke.
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