共查询到17条相似文献,搜索用时 187 毫秒
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基于多体系统运动学理论和齐次变换矩阵的应用,结合C-A双摆五轴加工中心,建立了该机床的综合空间误差模型。基于该模型,推导出数控指令的补偿修正算法并开发出了几何误差补偿软件,最后进行测量与补偿试验。试验结果表明:针对C-A双摆五轴加工中心的建模方法可靠,采用的补偿方式有效,实现了误差补偿的目的。 相似文献
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加工中心几何误差建模分析与误差补偿策略 总被引:3,自引:0,他引:3
运用齐次坐标变换原理和刚体假设,建立了加工中心从刀点到工作台的总体误差传递矩阵,推导出了通用的加工中心几何误差计算模型;用此模型对TH6350卧式加工中心进行了几何误差计算,并对误差模型进行了校验和分析,提出了基于PC机的加工中心误差补偿策略。 相似文献
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能够进行热误差补偿的加工中心在线检测软件的研究 总被引:3,自引:0,他引:3
研究了加工中心在线检测软件误差补偿技术,基于Windows平台开发了误差补偿软件,并对软件开发中的关键技术:建立检测系统的几何误差与热误差综合模型,测头误差处理技术进行了研究。可以同时对测头误差、机床几何误差与热误差进行补偿,有效地提高了在线检测精度。软件系统在MAKINO立式加工中心上进行了实验验证。 相似文献
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文章结合丝杠热变形的非线性等特点,采用径向基函数神经网络方法建立丝杠热变形误差模型.同时基于Windows平台开发了相应的补偿软件,该软件可以同时对机床几何误差与主轴、丝杠热误差进行补偿,有效地提高了在线检测精度.软件系统在MAKINO立式加工中心上进行了实验验证,补偿效果明显. 相似文献
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针对五轴联动车铣复合加工中心制造、装配和运动过程产生的几何误差问题,文章以多体系统运动学理论为基础,根据车铣中心的复杂结构特点,分别建立了车铣中心的铣削模式和车削模式下的运动误差模型,并给出了精密数控指令的求解方法和进行了误差补偿仿真试验。实验结果表明:采用多体系统运动学理论建立车铣复合加工中心的几何运动误差模型是正确性;迭代法求解的精密数控指令准确、快捷;软件误差补偿投入少、效果明显。 相似文献
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以多体系统理论为基础结合齐次坐标变换原理,以i5T5.2型数控车床为例,分析其组成部件及拓扑结构,通过Matlab软件编写程序建立了该型车床的几何误差模型。通过计算机快速准确地对误差模型进行分析,并将分析结果以统计图的形式显示,便于发现误差分布规律及误差作用规律。通过机床实际加工棒料测得加工误差并与机床误差建模分析结果对比,较好地验证了模型的正确性。在后续实际加工中应用误差建模分析数据进行误差补偿,有效地提高了该型机床的加工精度。 相似文献
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Uncertainty analysis and variation reduction of three dimensional coordinate metrology. Part 1: geometric error decomposition 总被引:2,自引:0,他引:2
Zhongcheng Yan Been-Der Yang Chia-Hsiang Menq 《International Journal of Machine Tools and Manufacture》1999,39(8):1199
In this paper our study focuses on the uncertainty analysis and variation reduction of coordinate system estimation using discrete measurement data and is associated with the applications that deal with parts produced by end-milling processes and having complex geometry. This paper consists of three parts. Since the uncertainty of the estimated coordinate transformation arises from the geometric errors on a part surface, Part 1 is devoted to the study of surface geometric errors. In this study, according to the characteristics of end-milling processes the sampled geometric error is divided into two components, and a decomposition procedure is developed for geometric error decomposition. The results of surface geometric error decomposition will be used in Part 2 for uncertainty analysis and in Part 3 for variation reduction. 相似文献
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A unified least-squares approach to the evaluation of geometric errors using discrete measurement data 总被引:1,自引:0,他引:1
Hing-Tzong Yau Chia-Hsiang Menq 《International Journal of Machine Tools and Manufacture》1996,36(11):1269-1290
This paper presents a unified least-squares approach to the best fit of geometric features and evaluation of dimensional errors. The study originated from the need for advanced algorithms for the dimensional measurement of high precision manufactured parts. The proposed algorithm differs from traditional least-squares in that no linearization or approximation is employed and that it is general to all kinds of geometric features. Instead of computing a substitute best fit feature, the algorithm inversely transforms the measurement coordinates to best fit the nominal geometry. The sum of the squared errors in the surface normal direction is thus minimized with respect to the parameters of a rigid body transformation. Form tolerances are then evaluated using the peak-to-valley deviations after the best fit. To examine the uncertainty of the transformation obtained, sensitivity analysis was investigated to relate transformation errors to dimensional errors. A sensitivity measure is used to estimate the joint effect of the measurement locations and the number of measurement data on the accuracy of the coordinate transformation. Computer simulations have been performed on different geometric features to study the robustness and efficiency of the algorithm. Application to the measurement of high precision fuel injectors is also presented. 相似文献
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0 IntroductionThreekindsofinformationareneededforautomaticprogrammingofarcweldingrobot.(1)Geometricinformationofweldingworkpiece,includinggeometricinformationofweldingseamforweldingpathprogramming,grooveshapeandsizeforweldingparametersprogrammingandwork… 相似文献