冷成形直齿锥齿轮齿形回弹分析及凹模修正  

Tooth shape springback rule and die modification of cold forging straight bevel gear

作　　者：胡建军[1] 凌文凯[1] 张卫青[2] 侯天凤 

机构地区：[1]重庆理工大学材料科学与工程学院,重庆400054 [2]汽车零部件先进制造技术教育部重点实验室,重庆400054

出　　处：《锻压技术》2013年第5期20-23,共4页Forging & Stamping Technology

基　　金：重庆市科委资助项目(cstc2012gg-yyjs70019;cstc2012jjB70002)

摘　　要：针对直齿锥齿轮冷成形工艺,采用塑性有限元法,对成形过程进行数值模拟,分析了各阶段坯料流动情况及产品卸载后的回弹规律。结果显示,在齿高方向,最小回弹在最大齿厚0.02mm处,沿齿顶或齿根逐渐增大,接近齿顶处回弹值达到最大为0.14mm。选用反补偿修正法对齿形凹模二次修正,获得满足所需精度的目标齿轮,最大偏差值为-0.025mm。研究表明,通过数值模拟回弹分析与修正,可以获得较高齿形精度的直齿锥齿轮产品,缩短了模具制造周期,降低了成本。The plastic finite element method was adopted on cold forging straight bevel gear. The material flow and product springback were analyzed by numerical simulation. According to the simulation result, in the direction of tooth height, the minimum rebound appeared at drum, which was 0.02 mm, and was increasing gradually from tooth point to tooth root. Maximum springback was 0.14 mm at tooth crest. The tooth profile concave die was modified twice by re- verse compensation method and required accuracy was gained with maximum deviation value of -0. 025 ram. Research shows that by the springbaek analysis and modification with numerical simulation, the higher profile accuracy gear product can be obtained, the die manufacturing cycle is shortened and cost is reduced.

关 键 词：直齿锥齿轮 冷成形 回弹 模具 修正 

分 类 号：TH132.41[机械工程—机械制造及自动化]