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陈云春 《机械工人(冷加工)》2011,(16):18-19
现代模具制造技术已经迈向高精度、智能化、高速化,对在线测量的要求越来越高。同时,随着现代加工制造设备发展,数控机床的线性精度和几何精度也越来越高,控制器的功能越来越强大,这使得人们可以利用机床本身配以测头系统来实现对加工工件的在线测量,或刀具自动测量及检测。 相似文献
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加工中心在线测量功能的实现 总被引:2,自引:0,他引:2
介绍加工中心在线测量的意义和基本方法,着重介绍测头的选用、系统的连接以及对测量数据的处理,对一般数控机床实现附加的测量功能具有指导性意义. 相似文献
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在数控机床上装上测头 ,可对加工零件进行测量 ,实现加工—测量一体化。如某单位的主导产品上的 1个关键零件 ,是由 2段圆弧、3段曲线组成的 ,无法用常规量具测量 ,只能采用样板目测。后来在数控机床上装上测头 ,实现在线测量 ,有效地保证了产品质量。机床测量功能的编程 ,需要 相似文献
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用FANUC数控系统宏程序功能编制零件测量程序 总被引:3,自引:0,他引:3
在数控机床上装上测头,可对加工零件进行测量,实现加工一测量一体化.如某单位的主导产品上的1个关键零件,是由2段圆弧、3段曲线组成的,无法用常规量具测量,只能采用样板目测.后来在数控机床上装上测头,实现在线测量,有效地保证了产品质量. 相似文献
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于佃清 《仪器仪表标准化与计量》2015,(1):43-44,48
本文为优化数控机床在线测量系统,将数控机床在线测量系统拆分为数控机床本体和测头测量系统两部分,通过对数控机床在线系统的结构组成和工作原理分析,再对测头系统的结构组成及测量原理分析,然后对其开展深层次的分析误差来源及性质。以期能够为数控机床在线测量有效优化提供有价值的参考依据。 相似文献
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在数控机床上采用非正交系在线坐标测量系统对加工工件及刀具进行测量,可实现在线测量功能,保证测量精度,提高生产效率. 相似文献
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Quick and accurate detecting the error of NC machine tool and performing the error compensation are important to improve the machining accuracy of NC machine tool.Currently,there are many methods for detecting the geometric accuracy of NC machine tool.However,these methods have deficiencies in detection efficiency and accuracy as well as in versatility.In the paper,a method with laser tracker based on the multi-station and time-sharing measurement principle is proposed,and this method can rapidly and accurately detect the geometric accuracy of NC machine tool.The machine tool is controlled to move in the preset path in a 3D space or 2D plane,and a laser tracker is used to measure the same motion trajectory of the machine tool successively at different base stations.The original algorithm for multi-station and time-sharing measurement is improved.The space coordinates of the measuring point obtained by the laser tracker are taken as parameter values,and the initial position of each base point can be determined.The redundant equation concerning the base point calibration can be established by the distance information of the laser tracker,and the position of each base point is further determined by solving the equation with least squares method,then the space coordinates of each measuring point can be calibrated.The singular matrix does not occur in calculation with the improved algorithm,which overcomes the limitations of the original algorithm,that the motion trajectory of machine tool is in a 3D space and there exits height difference between the base stations.Adopting the improved algorithm can expand the application of multi-station and time-sharing measurement,and can meet the quick and accurate detecting requirements for different types of NC machine tool. 相似文献
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Dr Psang Dain Lin Tsian Hsing Liu 《The International Journal of Advanced Manufacturing Technology》1996,12(5):356-365
An analytical methodology is developed for NC data generation to produce and measure spatial cams on 5-axis machine tools. The Denavit-Hartenberg notation is used for expressing the ability function of the employed machine tool and in the generation of the desired cutter/measuring-probe location. NC data equations are determined by equating the corresponding elements of the machine tool's ability function to the desired tool location matrices. To validate this methodology, a designed cam was machined and its surfaces were measured by an online measurement system equipped with a touch-trigger probe on a 5-axis machine tool. The resultant cutting speed and material-removal rate during machining are also investigated. This methodology is a general one and is applicable to various spatial cams. It also combines the activities of design, manufacturing, and measurement, thus making the production process more flexible, automatic, and controllable. 相似文献
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为了降低数控机床几何误差,提升加工精度,提出机械制造业数控机床几何误差自动控制方法。通过激光跟踪仪辨识机械制造业数控机床的几何误差,采用快速定位补偿算法与圆弧插补补偿算法相结合的方法补偿数控机床几何误差。利用计算机辅助制造软件生成刀位文件,依据刀位文件生成数控机床加工程序,通过补偿控制器生成数控机床各轴运动的控制指令,数控机床伺服系统接收控制指令后,自动控制数控机床各轴运动,以达到数控机床几何误差自动控制的目的。实验结果表明,采用该方法自动控制数控机床几何误差后,方向与角度的几何误差分别低于0.03 mm与0.1°,实际应用效果较好。 相似文献
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对于数控机床工作台的定位检测问题,实际上也就是工作台在工作状态下的位置检测。我们通过对自制的模拟数控机床工作状态的实验台,在某一特定时刻的特定位置转化成位移量加以测量,用以研究数控机床进给系统工作台定位精度检测的方法。 相似文献
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利用数控设备进行在线测量的探讨 总被引:1,自引:0,他引:1
通过数控机床与三坐标测量机的对比,提出了利用数控机床进行复杂曲面测量的基本方法;重点分析了数控系统的结构,提出了不同系统的开发方向及一般数控系统的在线测量方案;最后总结了研究意义。 相似文献
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针对发展国产高精度数控机床的需求,提出一种数字化全闭环控制方法,开发出新型数字化全闭环位置控制系统,实现了以数字驱动、数字检测和数字位控为特征的全数字化刀具轨迹控制,有效保证了数控机床的加工精度。该系统已在多种国产数控机床上进行了应用,在复杂精密零件加工方面取得良好效果。 相似文献