汽车发动机螺旋伞齿轮热锻模具设计

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中图分类号：U464.13 文献标识码：A 文章编号：1003-8639（2025）06-0117-03

Design of HotForging Diesfor Spiral Bevel Gearsof Automotive Engi

WangYanxia，Lian Yingying，MengHua

（Shangqiu Instituteof Technology，School of Mechanical Engineering，Shangqiu 476ooo，China）

【Abstract】Based on the analysisof the designtheoryof spiral bevel gears forautomotive enginesand in combinationwith theactualrequirementsofcloseddieforgingprocesses，thisarticleselects thecompoundclosed die forming scheme.According tothemechanical propertiesof 45stelandthe materialpropertiesof hotworkingdie steel （4Cr5MoSiV1），The working condition parameters such as the preheating of the hot forging die （temperature 250‰ ）， the forging speed of the moving die（ 70mm/s ），and the friction coefficient（O.3）are proposed.The manufacturing of helical bevel gearsisachievedbydesigning thecompounddie structure（floating diecore，inner/outerringsof thetooth die）toincrease fluidityand improve molding accuracy，combining the use of pressure pads to reduce compressive stress and gray irondieseats to lower the manufacturing costofthe die，aplying thecompound ejection structure to solve the problemofdiejammingofforgings，andadoptingthecombineddieandspringreturntosolvetheflashproblem.It provides a reliable design theory and manufacturing basis for its high productivityand high surface quality offorgings.

【Key words】 spiral bevel gear；hot forging dies；closed die forging；compound ejection mechanism

近几十年来，中国汽车行业取得了飞跃式的发展，“一带一路”政策的实施和新能源汽车的普及，使得我国汽车产业的发展更加强劲，未来几十年，将会迎来一个更加繁荣昌盛的时代。（剩余3502字）