Research on multi-position cold forging process and die design for shaftsChinese Full Text
Xia Juchen;Jin Junsong;Deng Lei;Wang Xinyun;Xia Hanguan;Dong Yi;Wang Yaozu;State Key Lab of Material Process and Die ＆ Mold Technology,Huazhong University of Science and Technology;Pacific Precision Forging Co.,Ltd.;
Abstract: According to the shape characteristics of shafts,a multi-position process of combination of cold shrink extrusion and semiclosed upsetting was proposed,relatively,the process optimization method and six principles of die design were put forward. A five-position-cold forging process and relative dies were designed for a car driving shaft. After the hardness ≤140 150 HBS of rod blanks through ball annealing,cleaning up oxide coating and phosphating treatment,the multi-position process experiments were carried out by using both single-station die on Y28- 400 /400 double action hydraulic press and multi-station die on YK34J- 1600 five-station hydraulic press. The results show that the forgings obtained by the process have fine dimensional accuracy and quality,the material utilization reaches 90% ~95%,and the surface roughness reaches Ra0. 4- 0. 8 μm. The designed die has long service life and is reasonable for manufacturing,fixing and repairing.
Keywords：
shaft; multi-position cold forging; die; cold shrink ironing extrusion; semi-closed upsetting;
- DOI：
10.13330/j.issn.1000-3940.2014.10.011
- Series：
- Subject：
- Classification Code：
TG316
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