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滚轧轮运动方式对减速机蜗杆滚轧成形的影响
英文标题:Influence of roller motion modes on rolling forming of reducer worm
作者:苑文婧  邢子文 曹建文 张琦 田浩彬 
单位:西安交通大学 苏州通润驱动设备股份有限公司 
关键词:蜗杆 滚轧成形 热压缩实验 热力耦合数值模拟 滚轧轮运动方式 
分类号:TG335.6
出版年,卷(期):页码:2017,42(10):106-112
摘要:

研究了减速机蜗杆零件滚轧成形过程中滚轧轮运动方式对成形的影响。首先根据蜗杆零件特点,设计了轴线平行的两滚轧轮滚轧方式,并确定了滚轧轮的具体结构参数。然后进行了蜗杆材料20CrMnTi钢的热压缩实验,在应变速率分别为0.1,1,10和30 s-1,实验温度分别为800,900和1000 ℃的情况下,得到了材料的应力-应变曲线。最后通过数值模拟研究了蜗杆滚轧过程中两种滚轧轮运动方式的成形结果,并进行了实验验证。结果表明:当两个滚轧轮顺时针单向旋转时,数值模拟中工件轴向位移达到6.48 mm,实验件达到2.66 mm;当两个滚轧轮先顺时针、再逆时针往复旋转时,工件的轴向位移矢量和接近零。滚轧轮往复旋转的滚轧方式能够有效避免蜗杆工件轴线位移严重的问题,保证了滚轧的顺利进行。

The influences of roller motion modes on rolling forming was studied for reducer worm parts. Firstly, the rolling method of two rollers with parallel axes was designed, and the parameters of roller were determined according to characteristics of the worm part. Then, the thermal compression test of worm material 20CrMnTi steel was carried out under test temperatures of 800, 900 and 1000 ℃ and strain rates of 0.1, 1, 10 and 30 s-1, the stress-strain curves of this material were obtained. Finally, the forming results of two kinds of roller motion modes in the worm rolling process were studied by numerical simulation and verified by experiments. The results show that when two rollers rotate clockwise in a single direction, the axial displacement of workpiece reaches 6.48 mm in the simulation and the axial displacement of experiment workpiece reaches 2.66 mm, and when two rollers rotate clockwise and counterclockwise, the axial displacement vector of workpiece is close to zero. The reciprocating rotation of rollers is benefit to avoid the axial displacement deviation of warm workpiece and ensure rolling successfully.

基金项目:
上海第二工业大学2017年度校青年教师培养科研资助项目(2017003)
作者简介:
作者简介:苑文婧(1979-),女,博士,讲师,E-mail:wjyuan@sspu.edu.cn
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