摘要
在热处理过程中,往往由于原材料内部缺陷、工件表面与心部产生的温差以及组织比体积的变化等原因使滚珠丝杠产生热处理应力。热处理应力一般分为3种类型,即结构应力、热应力和相变应力,其中相变应力对滚珠丝杠的危害是最大的。工件中的热处理应力基本上不是单一类型存在的,往往是几种类型的代数组合。文中分析了过大的热处理应力对滚珠丝杠尺寸稳定性和精度的危害,以避免滚珠丝杠产生淬火裂纹、工件变形和疲劳失效。研究了预防和消除滚珠丝杠热处理应力的有效措施。
In the process of heat treatment, heat treatment stress is produced by the internal defect of raw material, the difference in temperature between the surface and center of workpiece, change in w）lume of the tissue and other reasons. Heat treatment stress is generally divided into three types, namely the structure stress, thermal stress and appearance transformation stress. The appearance transformation stress is one of the biggest harmful roll h）r the ball screw. Heat treatment stress of the workpiece basically doesn＇t exist alone, heat treatment stress often tends to a combination of several types. The effects of excessive heat stress on the ball screw size stability and precision are analyzed to avoid the quenching crack, the workpiece deformation and fatigue failure. The effective solution is nresented to nrevent and eliminate heat stress of ball screw.
出处
《机械工程师》
2014年第7期16-18,共3页
Mechanical Engineer
基金
北京市科技计划项目(Z121100001612010)
关键词
热处理应力
滚珠丝杠
应力
heat treatment stress
ball screw
stress
