测试系统论文重型曲轴旋风刀架性能测试系统的研究.docVIP

测试系统论文：重型曲轴旋风刀架性能测试系统的研究 【中文摘要】分体开合式旋风刀架是数控重型曲轴铣车复合加工中心的关键部件,其性能优劣对大型曲轴的加工精度具有直接的影响,本文通过构建旋风刀架性能测试系统来完成对旋风刀架中关键的性能指标的测试,以确保旋风切削刀架的切削性能。根据旋风切削刀架的结构特点,分析影响旋风刀架主要性能的关键技术指标,即切削过程中的工件的振动性能、U轴精密进给精度、刀架与刀盘开合的重复定位精度,制定测试任务,针对测试任务制定测试系统方案。利用UG仿真软件对旋风刀架关键零部件进行三维建模,组装成装配体模型,并通过ANSYS有限元分析软件对旋风刀架三维模型进行有限元分析,主要包括静力学分析和模态分析。在理论上得到旋风切削刀架装配体的应力分布、变形分布、前六阶振型及相应固有频率。根据测试系统方案,采用研华USB-4711A数据采集器与Kistler微型加速度计进行工件振动性能测试,采用PIC16F877A单片机与Heidenhain光栅长度计进行U轴进给精度测试,通过测试系统软件来控制数据采集。测试软件采用VC6.0进行编制,负责控制数据采集,进行数据的接收与处理,并能够实现图形绘制、数据输出等功能。最后通过测试实验,完成对旋风刀架主要性能的测试,并对测试数据进行数据处理,分析测试结果是否符合精度指标要求。同时,通过测试实验也验证了测试方案与测试系统的正确性与可行性。 【英文摘要】Fission hinged whirlwind tool holder is the key equipment of Heavy-duty NC Crankshaft Milling and Turning Complex Machining Center. Its performance has a direct impact on the precision of large crankshaft. The objective of this paper is to finish the test of Whirlwind Tool Holder抯 key performance by constructing a performance test system.According to the structure characteristics of whirlwind tool holder, a test task was made after analyzed its key technical indicators. Namely the vibration performance of the work piece in the cutting process, the precision of U-axis cutting feed, the repeat location accuracy of tool holder and cutter. And then a total scheme of the performance test system was made. Three-dimensional modeling of the key parts of the Whirlwind Tool Holder were founded by the UG software, and then the assemble body model was completed. The assemble body model was analyzed by the ANSYS software, mainly including the statics characteristic analysis and modal analysis. The stress distribution, deformation distribution, the front six order modal shape and natural frequency in theory were got through the analyses.According to the test system scheme, the work piece抯 vibration performance was tested with Advantech USB-4711a data acquisition and Kistler micro-accelerometer. The U-axis cutting feed precision was tested with PIC16F877a MCU and Heidenhain grating len