With the involute spline on the adjustment pole of the Liebao Mitsubishi auto chair as an example,the cold extruding process for forming the involute splines was stated.

• 以猎豹三菱汽车座椅调节杆上的渐开线花键为研制对象,阐述了渐开线花键的冷挤压成形工艺,冷挤压模制造工艺采用线切割成形。