【作者】 刘志红；

【导师】 牛文铁；

【作者基本信息】 天津大学 ， 机械工程， 2013， 硕士

【摘要】 进给系统作为数控机床的重要组成部分，其动态性能的优劣直接影响到零件加工精度。进给系统动特性是数控机床安装/调试、维修与维护过程中的重要性能指标，也是加工工艺过程中选择机床的重要依据。此外，通过进给系统动特性长期监测，预测其变化规律，可为数控机床主动维修与维护提供参考。综上所述，研究数控机床进给系统快速测试与评价技术，具有较高理论意义及工程实用价值。本文主要工作如下：(1)提出了进给系统动态特性快速测试与评价方法。该方法通过数控系统光栅尺读取数据，获取不同激励信号的响应数据，实现快速测试；以响应效率、定位精度、速度跟踪性能和延迟特性作为评价指标，利用层次分析法实现进给系统动态特性的综合评价。(2)通过模态分析和谐响应分析研究了进给系统固有动态特性，基于典型进给系统刚柔耦合非线性模型，研究了摩擦力对进给系统动态特性的影响规律。(3)利用上述快速测试与评价方法，通过对影响进给系统动特性关键伺服参数的正交实验分析，实现了伺服参数的优化，并通过对比实验分析了其有效性。(4)开发了进给系统动态特性快速测试与评价软件系统。DNC客户端子系统采用C/S模式，实现测试数据处理；DNC服务器端子系统采用B/S模式，实现进给系统动特性参数设置及机床动态性能对比分析。更多还原

【Abstract】 The dynamic performance of feed drive system, as an important part of CNCmachine, has a key impact on the machining precision. For one thing, it becomes animportant performance indicator when the machine tool was installed, debugged,repaired and maintained. For another, it is a good reference to choose appropriatemachine tool according to the processing requirement of work pieces. What’s more,the forecast of its variation rule could provide foundation for proactive maintenanceof machine tool by monitoring the dynamic performance of feed system in the longrun. Therefore, the research on test and evaluation method for dynamic performancesof feed system of CNC machine tool has great values both in theory and engineeringpractice. The main achievements are as follows:(1) The effective test and evaluation method for the dynamic performance of feedsystem was presented. In this case, three different excitation signals were given tomachine tool and the response data could be get through grating scale. Thegeneral evaluation results of the dynamic performance of feed system could becalculated with Analytic Hierarchy Process, combining the evaluation indexes:Response Efficiency, Position Precision, Speed Tracking Performance and DelayCharacteristic.(2) The dynamic performance of feed system was researched by modal analysis andharmonic response analysis. On the basis of rigid-flexible coupling dynamicmodel of feed system, the effect of friction on the dynamic performance of feedsystem was studied.(3) Based on the above fast test and evaluation method, the servo parameters wereoptimized through analyzing the effect of different parameters on dynamicperformance of feed system with the orthogonal experiment, and the effectivenessof the method was verified by comparison analysis.(4) The software system to test and evaluate the dynamic performance of feed systemwas developed. One subsystem was used to deal with the experiment data, whichwas run on DNC client in C/S model; the other subsystem was for setting thetesting parameters and evaluating dynamic performance of feed system, which was run on DNC server in B/S model.更多还原