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Abstract：
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The existing questions of mould wear and the protruding head of spur gear during the warm extrusion are discussed and the reason and aftereffect are analyzed.In order to reduce the cost and make smooth production,the cold technology is adopted to carry out the technical experiment.The experiment studies the matters of gear related parameters,the extrusion force estimation,the process procedure and the mould structure optimization.Therefore,the spur gears are successfully made by cold extrusion technology.Through analysis and comparison,it is found that the surface quality of gear made by cold extrusion technology is better than that made by warm extrusion technology and there is no mould wear phenomenon.The experiment results show that the cold extrusion technology is available and it can increase the mould life, improve the quality of gear surface and cut down the cost.
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Funds：
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河南省教育科研基金资助项目(200460009)
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AuthorIntro：
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Reference：
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[3]李更新,杨永顺.直齿圆柱齿轮热挤压工艺[J].机械制造,2004,(3):62 63.
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