摘要
滚珠丝杠在进给过程中由于摩擦产热导致变形,从而影响机床加工精度。为减小热变形常采用热平衡、热对称设计。通过分析轴承摩擦生热与丝杠温度升高之间的数学关系,得到的滚珠丝杠热模型符合一阶系统。调整一阶系统参数便可控制丝杠的温升速率和热平衡时间,为机床设计阶段散热、热平衡、热对称相关的设计提供了新方法,对提高机床加工精度有非常重要的意义。为验证此结论,搭建了滚珠丝杠系统热特性试验台,在不同转速下进行了滚珠丝杠的温度测试,测试结果验证了模型的正确性。
Ball screws are deformed due to frictional heat during the feed process,which affects themachining accuracy of the machine tool. The relationship between the frictional heat generation of thebearing and the temperature rise of the screw is analyzed,and the ball screw thermal model isestablished. Using the law of conservation of energy,the thermal model of the screw is solved by the heatgeneration and heat dissipation calculations in accordance with the first-order system. The obtained ballscrew thermal model provides a method for controlling the temperature rise rate and thermal equilibriumtime of the ball screw,which is very important for improving the machining accuracy of the machine tool.To verify this conclusion,a thermal performance test bench for the ball screw system is set up to test thetemperature of the ball screw. The test results verify the correctness of the model.
作者
史晨阳
陈秀梅
SHI Chenyang;CHEN Xiumei(Mechanical Electrical Engineering School,Beijing Information Science & Technology University,Beijing 100192,China)
出处
《北京信息科技大学学报（自然科学版）》
2018年第6期93-96,共4页
Journal of Beijing Information Science and Technology University
关键词
丝杠
温升
热模型
一阶系统
screw
temperature rise
thermal model
first-order system
