锻压技术

直齿轮温挤压工艺参数分析及凹模磨损数值模拟

英文标题：Analysis on warm extrusion processing parameters of spur gear and numerical simulation of die wear

作者：施卫兵刘子利孙正茂徐祥龙

单位：江苏森威精锻有限公司技术中心南京航空航天大学合肥工业大学江苏森威精锻有限公司技术中心江苏大丰224100南京航空航天大学江苏南京210016 江苏南京210016 安徽合肥230009 江苏大丰224100

关键词：直齿轮工艺参数数值模拟磨损

分类号：TG376

出版年,卷(期):页码：2007,32(6):105-108

摘要：

采用刚粘塑性有限元法对直齿轮温挤压成形进行热力耦合分析。以成形时所需载荷为评价指标,就影响成形工艺的模具设计参数、齿轮特征参数,摩擦条件和工艺条件进行分组建模分析。分析结果表明:凹模半锥角越小,载荷越小;模数越小,齿数越少,载荷越小,且模数影响显著;摩擦系数越小,载荷越小;坯料加热温度、模具预热温度越高,载荷越小,且坯料加热温度影响显著;而挤压速度对载荷的影响不明显。基于Archard模型模拟了凹模的磨损状况,发现磨损主要集中在凹模成形区,齿腔顶端磨损最为严重。

Rigid-viscoplastic finite element method was used to analyze the warm extrusion processing parameters of spur gear in thermal-mechanical coupled way.Some groups of numerical models were built with different design param- eters of die,geometric parameters of gear,friction conditions or processing conditions,and the service loads were in- vestigated.From the investigation,the conclusions are drawn as follows:reducing the half-cone-angle of female die, the load becomes smaller;reducing modulus of gear and number of teeth,the load falls down,and the influence of modulus on the load is remarkable.Reducing the friction coefficient,the load is less)with the initial temperature of workpiece and die being increased,the load falls down,and the influence of initial temperature of workpiece on the load is notable.While the extrusion speeding has no obvious influence on the load.Based on the Archard model,the wear condition of female die was simulated.The results show that wear is centralized on deformation zone and wear on the top end of gear shaped die is serious.

基金项目：

参考文献：

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