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本发明是关于自行车脚闸后轴的制造方法,有关自行车脚闸已在美国专利№3252551号专利中作了介绍,其加工方法可采用圆钢车削、也可采用浇铸或冷挤等工艺成形,这些工艺生产的轴皮均需要各种金加工来加工弹道、锥形的离合部分和制动面,金加工不仅会导致原材料浪费,工时耗费量大,同时还需要花费用于质量控制,来保证零部件的公差。本发明是采用节材的分段加工方式,最
BACKGROUND OF THE INVENTION The present invention relates to a method for manufacturing a bicycle rear brake shaft. The bicycle brake has been described in U.S. Patent No. 3252551. The processing method may be a round steel turning or a cast or cold extrusion process, The shaft barks produced by these processes all require a variety of gold working processes for ballistic and conical clutch parts and braking surfaces. Gold working not only results in the waste of raw materials but also the laborious and time-consuming operation, as well as the cost for quality control Tolerance of components. The invention adopts the staged processing method of the material, most of them