共查询到18条相似文献,搜索用时 46 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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数控机床误差补偿技术及应用发展动态及展望 总被引:21,自引:0,他引:21
编者按数控机床误差补偿为促进技术的发展和推广应用,本刊从这期起陆续刊登北京机床所和天津大学联合撰写的一组“数控机床误差补偿技术及应用”文章,内容包括:发展动态及展望、几何误差补偿技术、载荷变形误差补偿技术、热变形误差补偿技术、在线监测误差补偿技术、综... 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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《机械制造与自动化》2016,(3):27-30
为了提高数控机床的加工精度,在系统分析数控机床几何误差常用补偿方法基础上,提出了基于数控系统插补数据的几何误差补偿方法,并将误差补偿功能集成于国产数控系统中,以提高国产数控系统的综合性能。通过实验与仿真结果表明,数控系统插补数据的几何误差补偿方案能显著提高数控机床的加工精度。 相似文献
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王正平 《世界制造技术与装备市场》2004,125(1):68-69
20年前,大型机床的主要定位精度为丝杠的螺距误差及热膨胀误差,但直至今日上述的大部份误差已藉由线性编码器来减少与补偿,因此机床的误差转而变成以垂直度误差与直线度误差为主要原因,然而为了达到三维空间定位精度,垂直度误差与直线度误差的测量与补偿则变得更为重要。 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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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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Error analysis and compensation for the volumetric errors of a vertical machining centre using a hemispherical helix ball bar test 总被引:2,自引:1,他引:2
S.-H. Yang K.-H. Kim Y. K. Park S.-G. Lee 《The International Journal of Advanced Manufacturing Technology》2004,23(7-8):495-500
Machining accuracy is directly influenced by the quasi-static errors of a machine tool. Since machine errors have a direct effect upon both the surface finish and geometric shape of the finished workpiece, it is imperative to measure the machine errors and to compensate for them. A laser measurement system to identify geometric errors of a machine tool has disadvantages, such as a high cost, a long calibration time and the usage of a volumetric error synthesis model. In this study, we proposed a novel analysis of the geometric errors of a machine tool using a ball bar test without using a complicated error synthesis model. Also, a statistical analysis method was employed to derive geometric errors using a hemispherical helix ball bar test. According to the experimental result, we observed that geometric errors of the vertical machining centre were compensated by 88%. 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
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J. S. Chen J. Yuan Professor J. Ni 《The International Journal of Advanced Manufacturing Technology》1996,12(4):266-275
A modelling strategy for the prediction of both the scalar and the position-dependent thermal error components is presented. Two types of empirical modelling method based on the multiple regression analysis (MRA) and the artificial neural network (ANN) have been proposed for the real-time prediction of thermal errors with multiple temperature measurements. Both approaches have a systematic and computerised algorithm to search automatically for the nonlinear and interaction terms between different temperature variables. The experimental results on a machining centre show that both the MRA and the ANN can accurately predict the time-variant thermal error components under different spindle speeds and temperature fields. The accuracy of a horizontal machining centre can be improved through experiment by a factor of ten and the errors of a cut aluminium workpiece owing to thermal distortion have been reduced from 92.4 µm to 7.2 µm in the lateral direction. The depth difference due to the spindle thermal growth has been reduced from 196 µm to 8 µm. 相似文献
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