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自适应数控编程与加工系统设计,需要运用仿形数据采集方法以及自动生成和精加工G代码程序等诸多技术,在工件加工生产前,利用传感器定位样品工件后,依据工件加工程序编码,按照数据点进行自适应数控编程与加工。本文基于针对整个系统的设计与实现展开综合性分析,为自适应数控编程与加工系统开发与运用制定相应的策略,以实现数控编程与施工控制、在线测量一体化,提升机械生产数控加工质量。 相似文献
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以SINUMERIK-810T数控系统作为控制系统的数控车床车削加工火车车轮为研究对象,分析毛坯制造精度低的工件的数控加工特点,提出毛坯加工余量在线测量后进行数控加工的自动图形编程方法。研究利用数控系统的刀具监控功能对加工余量进行测量的CAPP及NCP途径,并介绍了图形自动编程系统的系统总体构成。 相似文献
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以SINUMERIK-810T数控系统作为控制系统的数控车床车削加工火车车轮为研究对象,分析毛坯制造精度低的工件的数控加工特点,提出毛坯加工余量在线测量后进行空加工的自动图形编程方法,研究利用空系统的 监控功能对加工作量进行测量的CAPP及NCP途径,并介绍了图形自动编程系统的系统总体构成。 相似文献
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探讨了在数控铣削加工中,利用刀具半径补偿功能编程对工件进行加工时,工件产生少切削现象的原因,并提出了相应的解决措施。 相似文献
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在加工复杂自由曲面时,由于五轴数控机床运动部件之间容易发生干涉,使用计算机仿真验证数控程序的正确性,检测加工过程中的干涉和过切,可避免机床和工件的损坏,效率高成本低.利用UG软件建立机床模型,并进行软件二次开发,读取数控G代码指令驱动机床各轴运动,对加工过程进行动态的仿真,检测加工过程中机床各运动部件之间的干涉及工件过切. 相似文献
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利用Unigraphics(UG)CAD/CAM软件造型功能建立数控机床和零件模型,读取数控代码对机床各部件进行三维运动仿真,并检查加工过程中机床运动部件之间的干涉及工件过切,建立干涉实体,为刀具轨迹的修改提供依据,同时免除了因文件格式的转化而产生的误差。 相似文献
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数控程序控制机床用刀具对工件加工之前,不仅要定义刀具参考基准相对工件的位置,还必须定义刀具刀位点相对工件的位置。文章分析了不同对刀方案的对刀原理及操作方法、刀具长度补偿措施及应用特点。 相似文献
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目前国内使用的数控机床大多数内存容量比较小,而借助CAD/CAM软件自动生成的数控程序往往比较大,存在着数控程序无法一次传到数控机床端的矛盾,这给数控的连续加工带来很大不便。文中提出了通过程序对NC代码进行分段,以解决了数控机床连续加工过程中NC代码文件不能连续传输的问题,并利用Visual C++6.0作为编程语言,编制出相应的软件。 相似文献
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以椭圆曲面螺纹的编程与加工为例,探讨非圆曲面螺纹工件编程方法,并通过仿真软件和FANUC系统数控机床加工,验证和分析程序的可行性,解决特殊曲线轮廓和曲面螺纹加工的生产难题. 相似文献
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S. W. Zhu G. F. Ding S. W. Ma K. Y. Yan S. F. Qin 《The International Journal of Advanced Manufacturing Technology》2013,67(5-8):1423-1432
In machining process, fixture is used to keep the position and orientation of a workpiece with respect to machine tool frame. However, the workpiece always cannot be at its ideal position because of the setup error and geometric inaccuracy of the locators, clamping force, cutting force, and so on. It is necessary to predict and control the workpiece locating error which will result in machining error of parts. This paper presents a prediction model of a workpiece locating error caused by the setup error and geometric inaccuracy of locaters for the fixtures with one locating surface and two locating pins. Error parameters along 6 degrees of freedom can be calculated by the proposed model and then compensated by either using the “frame transformation” function of a numerical control (NC) system or modifying NC codes in post-processing. In addition, machining error caused by the workpiece locating error can be predicted based on a multi-body system and homogeneous transfer matrix. This is meaningful to fixture design and machining process planning. Finally, a cutting test has shown that the proposed method is practicable and effective. 相似文献
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Zhiwei Lin Jianzhong Fu Hongyao Shen Wenfeng Gan 《The International Journal of Advanced Manufacturing Technology》2014,74(1-4):187-197
Nonlinear errors in five-axis machining process are caused due to the nonlinear motions of the rotational axes, which are inevitable. For the RT-type machine tool, the workpiece setup location on the working table has a direct effect on the nonlinear errors, thus there must be an optimal setup position which can reduce the nonlinear errors. Today’s five-axis machine tools are mostly equipped the with the RTCP (rotational tool center point) function, with which the NC program becomes independent from the workpiece setup. In this paper, we have focused on finding the optimal workpiece setup for the RT-type machine tool with RTCP function, more specifically, the Mikron UCP 600 five-axis machine tool in our lab. The kinematics of the machine tool is briefly analyzed. Based on that, the nonlinear error evaluation method with RTCP interpolation is derived. With this method, nonlinear errors can actually be considered as a function of the workpiece setup position. Then, the particle swarm optimization (PSO) is applied to find the optimal workpiece setup, in which a mutation operation is used since PSO traps into local optimum easily. The proposed optimal workpiece setup method is implemented and tested. Example results show that the optimal setup with least nonlinear errors can be found. Some interesting results also show that the nonlinear errors are not sensitive with the z component of the workpiece setup vector. The proposed optimization is nearly zero-cost and easy to both understand and implement, yet has a potential to reduce the nonlinear errors and thus to improve the accuracy of five-axis machining. 相似文献
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数控加工中工件的自动定位 总被引:1,自引:0,他引:1
提出了以工件为基准的自动定位原理,即当工件安装偏斜时,使工件坐标系自动适应机床的加工要求,该方法在测出工件的偏斜角度和偏移坐标值,并对原数控加工程序进行自动修正后,可方便实现。在不改变加工结果的情况下,可减少工件的找正和装夹时间。 相似文献
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杨晓春 《机电产品开发与创新》2012,(6):174-175,165
数控机床使用丝锥攻丝、板牙套扣等常规方法虽可进行内外螺纹加工,但是一种规格的丝锥或板牙只能加工一种规格的螺纹,一般只能加工单线螺纹,多线螺纹几乎无法加工。论文利用FANUC数控系统G02/G03螺旋插补和B类宏程序功能,通过M37×Ph5P2.5实例,对刀、计算后编制宏程序,完成了内外螺纹的数控铣削加工,此加工方法不受螺纹直径、螺距大小、旋向、线数、工件复杂程度的影响,螺纹刀具品种也可以变少,适用性较强。 相似文献