丝杠滚道型面误差动态非接触测量系统设计与分析

【作者】 陈进；

【导师】 冯虎田；

【作者基本信息】 南京理工大学 ， 机械电子工程， 2008， 硕士

【摘要】 本课题结合实际工程项目“丝杠滚道型面误差动态综合测量系统设计与开发”,针对现今国内滚珠丝杠滚道型面几何参数误差检测手段相对滞后的现状,设计开发适合我国国情的丝杠滚道型面几何参数误差检测试验台。测量系统通过采集轮廓曲线上的数据点,实现对丝杠各个滚道型面的测量。这条轮廓线位于滚珠丝杠轴截面的顶部。系统采用的是非接触式测量方式,用光幕式传感器采集轮廓曲线的纵轴方向的位移,用高精度的海德汉光栅尺采集轮廓曲线的横轴方向的位移。测量系统的电机控制模块,选用运动控制器作为伺服系统控制器实现对主轴电机位置控制与进给电机的速度控制。本文重点对滚道型面几何参数的计算方法进行研究。该算法先对采集的数据点进行数据划分,将其分割成螺纹滚道数据域和丝杠外径数据域,再分别对这两个数据域分别进行处理,得到系统要求的几何参数。基于LabVIEW开发了集成测量系统操作软件,实现了参数设置、动态测量、数据处理、数据维护、系统功能测试等功能。利用LabVIEW优秀的图形显示功能,来描绘测量系统中各参数的测量曲线。其中的算法关键函数利用VC编制成DLL,在LabVIEW中调用,提高了运算速度。该试验平台可以实现丝杠中径、丝杠外径、螺距、滚道跳动、滚道形状误差的测量。对测量系统的前期研究将为以后该系统的进一步完善和提高提供了具体的技术方案及检测手段。更多还原

【Abstract】 Combining with the actual project "Design and develop the groove surface error of the ball screw integrated dynamic measuring system", the test-bed used for testing the geometry parameters error of the ball screw groove surface, suitable for our nation, is designed and developed in this paper as for the condition that present test means were backward in our country.The system achieves the measurements of each groove surface of the ball screw by collecting the data points of contour curve. This contour curve is at the top of shaft cross-section of the ball screw. By the non-contact measurement method, it uses the screen sensors to gather the displacement in the vertical direction of the contour curve, and uses the high-precision HEEDENHAIN grating-foot to gather the displacement in the horizontal direction of the contour curve. In the motor control module of the measurement system chooses the motion controller as the servo system controller to achieve the control of the position of the spindle motor and the speed of the feed motor.This paper mainly focuses on studying the calculation method of geometry parameters of the groove surface. In this method the colleting data points are divided first. They will be separated into their thread groove data domain and screw diameter data domain. Then these two domains data will be processed respectively, and in the end the geometric parameters that system requirements will be got.Based on the software of LabVIEW, an integrated measurement system operating software is developed. It can achieve the functions of parameters setting, dynamic measurement, data processing, data maintenance, system testing and so on. It describes the measurement curves of each parameter from the measurement system by excellent graphics display functions of LabVIEW. Some key functions of the algorithm are compiled DLL with VC, and will called in LabVIEW. It helps to improve the computing speed.The test platform can achieve the error measurement of nominal diameter, ball screw shaft outer diameter, lead, raceway run-out, groove shape. The preliminary studies of the measurement system can provide specific technical solutions and test means for its further improvement and enhancement in the future.更多还原