摘要
采用模具应力分析模块模拟分析了某一斜齿轮冷精锻模具的弹性变形,获得了模具应力分布;结合齿形凹模型腔几何特点,得出不同位置的型腔齿廓弹性变形量及弹性变形规律;根据所获得的齿形弹性变形量,采用反补偿法对齿轮凹模型腔齿形部分进行修正,并再次进行数值模拟和分析,比较了修正前后齿形弹性变形量。研究表明,不同高度齿形型腔曲线的弹性变形量变化趋势一致,但各齿形曲线的齿根、渐开线和齿顶3部分变形量不同,从齿顶到齿根和从齿形型腔上端面至下端面,其弹性变形量逐渐减少,凹模型腔齿形修正后可减小成形齿轮弹性变形量,从而为提高斜齿轮成形精度提供了方法。
The mold elastic deformation in cold precision forging of helical gear was analyzed by mold stress analysis module,and the distribution of die stress was obtained. The amount of elastic deformation and the elastic deformation regularity of the tooth cavity profile at the different positions were carried out combining with the characteristics of tooth die cavity geometry. According to the elastic deformation of tooth cavity profile,the die cavity of tooth was modified by reverse compensation method,and numerical simulation and analysis were conducted again. Furthermore,elastic deformations of tooth before and after correction were compared. Studies are shown that the trends of elastic deformation of the tooth cavity profile at different heights are consistent,but the amounts of elastic deformation in the dedendum,involute and addendum of tooth cavity profile curves are different respectively,which decrease gradually from addendum to dedendum and from the top end face to the lower end face. Thus,the amount of springback of tooth cavity profile reduces after modification,and a method is provided to improve the forming accuracy of helical gear.
出处
《锻压技术》
CAS
CSCD
北大核心
2016年第8期127-131,共5页
Forging & Stamping Technology
基金
国家自然科学基金资助项目(51475344)
湖北省自然科学基金资助项目(2014CFB855)
关键词
斜齿轮
冷精锻
弹性变形
齿形修正
模具
helical gear
cold precision forging
elastic deformation
tooth modification
mold
