高速重载滚珠丝杠副轴向动态刚度及实验研究

发布时间：2018-03-12 15:04

本文选题：滚珠丝杠副　切入点：动态刚度　出处：《浙江大学》2012年硕士论文　论文类型：学位论文

【摘要】：滚珠丝杠副作为精密直线传动元件广泛应用于全电动注塑机等自动化数控机床中,但高速重载的工况会对滚珠丝杠副的传动性能产生巨大影响,本文在此基础上对高速重载滚珠丝杠副的轴向动态刚度进行探讨和研究。本文主要工作内容如下：第一章,介绍论文的研究背景和意义,概述滚珠丝杠副的特点及其分类。随后概述了滚珠丝杠副在国内外的发展制造现状以及理论研究成果,最后给出了论文主要研究内容和结构框架。第二章,对影响滚珠丝杠副轴向动态刚度的各个要素进行一一分析,丝杠副的支承形式、预紧方式、预紧力的确定、结构参数、运动参数以及摩擦和润滑都会对丝杠副的轴向刚度产生影响。综合考虑各个方面的因素,建立滚珠丝杠副轴向动态刚度模型。第三章,考虑实际工作过程中的冲击载荷以及离心力作用的影响,建立滚珠丝杠副受力模型,利用螺母和丝杠的速度关系,得到二者之间加速度的关系,利用赫兹应力公式推导出螺母侧和丝杠侧的接触应力公式,进而由接触弹性变形求出螺母侧和丝杠侧的接触刚度,并用算例表明结构参数和运动参数以及间隙是如何影响滚珠丝杠副的弹性接触变形。第四章,基于全电动注塑机合模机构,对高速重载工况下的滚珠丝杠副进行定位精度实验测试。叙述测试系统的原理、装置、实验过程和实验数据的处理的步骤,通过前文建立滚珠丝杠副的轴向动态刚度模型,计算出滚珠丝杠副的单位阶跃响应,然后将试验中位移光栅尺测得的位移数据转化为单位阶跃响应,对比理论数据和试验数据,验证应力公式和动态刚度模型的正确性,并根据刚度和频率的关系,分析速度和加速度对刚度的影响。第五章,总结本文研究结果和创新点,指出滚珠丝杠副研究中尚未解决的问题,并对进一步的研究工作进行展望。
[Abstract]:The ball screw as a precision linear drive component is widely used in the automation of all electric injection molding machines such as CNC machine, but the high speed heavy load will have a huge impact on the performance of ball screw pair, this paper on the basis of high speed and heavy load ball screw axial dynamic side stiffness were discussed and studied.
The main contents of this paper are as follows:
In the first chapter, we introduce the research background and significance of the paper, summarize the characteristics and classification of the ball screw, then summarize the development and current situation of the ball screw pair at home and abroad, as well as the theoretical research results. Finally, we give the main research contents and structure framework of the paper.
The second chapter analyzes various factors on the ball screw axial dynamic stiffness, bearing screw, preload, determine the pretightening force of structure parameters, motion parameters, friction and lubrication of screw axial stiffness. The influence factors to consider all aspects of the establishment. The stiffness model of ball screw axial dynamic.
The third chapter, considering the effect of impact load in actual work process and the centrifugal force, a ball screw force model, using the nut and screw speed, the relationship between the acceleration of two, using the Hertz stress formula is deduced and the screw nut side side contact stress formula, and then by the elastic contact calculate the deformation and the screw nut side side contact stiffness, and show that the structural parameters and motion parameters and the gap is how to influence the elastic contact deformation of the ball screw by example.
The fourth chapter, all electric injection molding machine molmerged institutions based on high speed heavy load ball screw positioning accuracy test. The device principle, test system, processing steps of the experimental process and the experimental data, this paper through the ball screw vice axial dynamic stiffness model, calculate the order of ball screw unit the step response, and then the displacement data measured displacement grating into the unit step response, comparing the theoretical data and experimental data, verify the correctness of the model should be the stiffness and dynamic force formula, and according to the relationship between the stiffness and frequency analysis, impact velocity and acceleration on stiffness.
The fifth chapter summarizes the results and innovation points of this paper, and points out the unsolved problems in the study of ball screw, and looks forward to the further research work.

【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TG659;TH132

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