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原来向心球轴承和圆锥滚子轴承内圈采用模锻工艺,产品质量差,废品率高,工具消耗大,劳动强度大,不安全。现采用压力机反挤压工艺,以后扩孔。共推广了31种锻件。质量有所提高,废品率降低50％,效率也有提高,例如:7909/02.原工艺班产300件,现工艺班产2,000件以上309/02原工艺班产2,000件,现工艺班产3,500件以上。
The original radial ball bearings and tapered roller bearing inner ring using forging process, poor product quality, high rejection rate, tool consumption, labor-intensive, unsafe. Are using the press anti-extrusion process, reaming later. A total of 31 kinds of forgings were promoted. Such as: 7909/02. The original process class production 300 pieces, the current production process is more than 2,000 pieces 309/02 The original production process production 2,000 pieces, the current production process class is 3,500 Pieces or more.