共查询到18条相似文献,搜索用时 62 毫秒
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本文介绍一种使用美国光动公司的激光多谱勒位移测量仪,对数控机床进行空间误差检测的激光矢量测量新方法。该方法可以方便而快速地检测出机床的空间定位精度,包括3个定位误差、6个直线度误差和3个垂直度误差;同时还可以根据测量的空间定位误差数据生成误差补偿的代码,进而可以对其进行空间定位误差的补偿,大幅度提高了数控机床加工精度。 相似文献
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介绍数控机床三维空间定位精度测量、补偿和校验的一种高效、精确的方法。通过激光多普勒干涉仪,运用矢量原理和多步测量的方法,通过四次调整测量就可以获得机床的12项误差元素,根据测量出的误差数据可以生成误差补偿代码并用于误差补偿以提高机床三维空间定位精度,最后通过实例验证该测量方法的准确性及高效率。 相似文献
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目前许多数控机床厂为了提高数控机床的位置精度及降低成本,采用机床数控系统中螺距补偿功能来消除其定位误差。螺距补偿是激光干涉仪通过机床运动部件在被测量轴每1个目标位置上测得的位置误差值,并通过补偿软件计算出位置误差补偿值,然后利用相同的RS232通讯电缆传送给数控系统,实现自动补偿。它比通常的补偿方法节省大量的时间,并且避免了由于手工计算和手动键入补偿值而引起的人为误差,同时可以最大限度地选用被测量轴上的补偿点,使之达到提高数控机床位置精度的目的。 相似文献
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随着现代工业技术的快速发展,数控机床的应用越来越广泛,其为精确加工技术带来巨大的动力,同时随着技术的发展又要求数控机床能够提供更高的精度。本文针对数控机床的精度检测,分析激光干涉仪的检测原理和检测方法,提出了数控机床的精度补偿措施,以提高数控机床的精度并降低重复定位带来的精度误差。 相似文献
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详细分析了超精密机床加工中,激光测量系统误差组成及其产生机理,给出了有效的修正和补偿手段.影响激光测量系统精度和重复精度的主要误差因素可分为3类:内部误差、环境误差和安装误差.通过实例分析精密机床四轴激光测量系统,设计出了四轴激光测量光路,实现超精密工作台的X、Y、Rz三自由度位置反馈,给出了影响测量精度的误差因素以及对系统精度的影响大小. 相似文献
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In this paper, we present a new statistical approach towards soft geometrical error compensation of machines with significant errors. The approach, based on an analysis of the probability of the random error recurring, can reduce the adverse influence of random errors on the compensation of systematic errors. The proposed methodology is made up of three steps. First, error classes are defined from the error bands obtained from calibration. Second, the probability of the magnitude of random error belonging to each of these classes is computed based on the density of the data set within the class. Based on these probabilities, the most probable systematic part of the error measurement can be statistically deduced. Finally, the geometrical error compensation is carried out based on this value. Experimental results are provided for the linear error compensation of a single-axis piezo-ceramic motion system. 相似文献
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Dr Eung-Suk Lee Suk-Hwan Suh Jin-Wook Shon 《The International Journal of Advanced Manufacturing Technology》1998,14(1):43-49
A comprehensive method for measuring the systematic errors of CNC-machine tools has been studied. The method used for measurement and calibration of machine tool errors should be general and efficient. The objectives of this study include:
Using the same method, the machine tool status can be completely identified and its accuracy can be enhanced by software error compensation. The point compensation method can be used as a means for modifying the nominal tool path and on-the-machine inspection where the machine tool is used as a coordinate measuring machine. The validity of the error calibration method proposed in this paper was shown using a vertical 3-axis CNC machine with a laser interferometer and a ball bar technique. 相似文献
1. | Volumetric error modelling. |
2. | Experimental procedure for error measurement. |
3. | A tool position and path compensation method. |
4. | The verification method. |
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Measurement and compensation for volumetric positioning errors of CNC machine tools considering thermal effect 总被引:5,自引:5,他引:0
Hongtao Zhang Jianguo Yang Yi Zhang Jinhua Shen Charles Wang 《The International Journal of Advanced Manufacturing Technology》2011,55(1-4):275-283
The measurement and compensation of volumetric positioning errors can be used to significantly improve the accuracy of machine tools. In this paper, a sequential step diagonal measurement is introduced to measure nine volumetric positioning errors in a short time. Measurements under various thermal conditions are preformed to understand the relationship between the volumetric positioning errors and the machine temperature field and variations. A radial basis function neural network is used to predict the volumetric positioning errors at all positions based on the temperature distribution of the machine. Compensation experiment is carried out to validate the performance of the measurement and the prediction method. The experimental results show that the volumetric accuracy of the machine tool is significantly improved by the error compensation. 相似文献
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IMPROVINGACCURACYOFCNCMACHINETOOLSTHROUGHCOMPENSATIONFORTHERMALERRORSLiShuheZhangYiqunYangShiminZhangGuoxiongTianjinUniversit... 相似文献
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针对大型数控龙门铣床几何误差的问题,建立了大型数控龙门铣床的几何误差模型,分析了大型数控龙门铣床的几何误差源;利用API(T3)激光跟踪仪高精度大尺寸的测量特点及数据处理能力,提出了X、Y、Z轴线位移误差、角位移误差及各轴间垂直度误差的辨识算法,通过激光测量与计算准确地辨识了大型数控龙门铣床的几何误差;建立了大型数控龙门铣床加工空间几何误差数学模型,采用基于对象的事件驱动机制的程序设计语言Visual Basic开发了几何误差补偿软件,实现了几何误差补偿;现场检测了大型数控龙门铣床空行程平面运动轨迹及工件的平面度。研究结果表明,该方法使平面加工精度提高了50.77%,并验证了几何误差模型的正确性及几何误差补偿方法的有效性。 相似文献