摘要
陶瓷作为新兴的材料在高速滚珠轴承上得到了广泛应用,目前滚珠丝杠滚珠材料大部分还是以轴承钢为主。论文在赫兹接触、滚道控制理论的基础上,对混合陶瓷滚珠丝杠副进行了等效简化,建立了高速滚珠丝杠副的多体动力学仿真模型,以间隔滚珠尺寸、运行速度和接触角为主要分析对象,通过正交实验,对比分析了不同型式的混合陶瓷滚珠链对滚珠丝杠副力学性能的影响,仿真结果表明,进给速度是影响混合陶瓷滚珠丝杠副摩擦力矩大小的主要因素,其次为间隔陶瓷滚珠的尺寸,通过改变滚珠尺寸建立不同组合的混合陶瓷滚珠链,可以有效提高高速工况下的混合陶瓷滚珠丝杠副的动力学性能。
Current ceramic is used as the material for high speed ball bearing for its low density and lubricant performance ; however the most common material for the high speed ball screw is chromium-molybdenum steel rather than the ceramic. Based on the hertz contact and raceway control theory of the ball screw and considering the centrifugal force and gyroscopic moment acting on the ball screw, the dynamic model of high-speed ball screw was set up. Take interval size, speed and contact angle of ball as main analysis subject, and the effects of different types of working ceramic ball chains on the mechanical properties of the ball screw were studied and compared through the orthogonal experiment, The result has shown that feed rate is the main factors on the friction torque of hybrid ceramic ball screw, another factor is interval ceramic ball size. Different combinations of hybrid ceramic ball chain is established by changing the ball size and the multi-body dynamic simulation results of these model show that the dynamic characteristic of ball screw at high speed can be raised through changing the size of the interval ball.
出处
《组合机床与自动化加工技术》
北大核心
2013年第8期30-32,35,共4页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家自然科学基金(51105232)
