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全自动洗衣机的渐开线花键轴,模数为0.8,齿数为12,分度圆压力角为30°,分度圆弧齿厚为1.257Sd2(_(-0.10)~(-0.05)),材料为奥氏体不锈钢(1Cr18Ni9Ti),要求2级精度。国外采用冷挤压工艺加工,国内尚无先例。我们在研制国外进口同类型全自动洗衣机中,率先采用了冷挤压加工这种小模数渐开线花键轴。花键成形属于反挤压工艺,其工艺特点是在模具中只有凸模无凹模,而毛坯直径在冷挤前略小于渐开
The involute spline shaft of the fully automatic washing machine has modulus of 0.8, number of teeth of 12, pressure angle of indexing circle of 30 °, tooth profile of 1.257Sd2 (_ (- 0.10) ~ (-0.05)) , The material is austenitic stainless steel (1Cr18Ni9Ti), requires 2 precision. Foreign use of cold extrusion process, there is no precedent. We developed the same type of automatic washing machine imported from abroad, the first to adopt a cold extrusion processing of this small modulus involute spline shaft. Spline forming is anti-extrusion process, the process is characterized by the mold in the only punch without die, while the rough diameter slightly less than before the cold extrusion