摘要
通过建立电动注塑机用滚珠丝杠副接触角等结构参数以及速度和加速度的动态受力模型,利用螺母和丝杠的速度关系,得到二者之间加速度的关系。应用赫兹应力公式推导出螺母侧和丝杠侧的接触应力公式,并进一步分析了接触角等结构参数以及速度和加速度对丝杠副接触应力的影响。结果表明,对于电动注塑机用滚珠丝杠副,速度的增大会造成接触应力的明显增加,加速度的增加也会造成接触应力的增加。
A dynamic force model of the ball screw used for electric operated injection molding machine was established using contact angle, velocity, acceleration, and others as structure parameters. Relationship between the velocity and acceleration of nut and screw was obtained. The contact stress at the nut and screw sides was described in terms of Hertz stress formula, and the effect of the structure and motion parameters on the contact stress of ball screw was further analyzed. It showed that, for a ball screw, increase in either velocity or acceleration could cause increase in contact stress significantly.
出处
《中国塑料》
CAS
CSCD
北大核心
2012年第3期103-107,共5页
China Plastics
关键词
滚珠丝杠副
电动注塑机
动态受力模型
加速度
离心力
赫兹接触应力
ball screw
injection molding machine
dynamic force model
acceleration
centrifugal force
Hertz contact stress
