共查询到19条相似文献,搜索用时 93 毫秒
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以坐标测量法为基础,选择涡流式非接触传感器,并通过误差补偿技术,达到三维非球回转曲面在线精密测量的目的。根据所测量原理,在普通数控车床上,以模拟试件进行了在线测量并取得较好结果。 相似文献
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《机械制造与自动化》2016,(3):5-7
触发式测头是数控机床在线检测系统的组成部分,在线检测过程中预行程误差不可避免,带有预行程误差的测量结果将影响产品检测精度。分析了触发式测头测量中预行程误差产生的原因,采用标准球的标定方法测量了预行程误差,从测量结果中剔除了机床运动误差,得到准确的预行程误差。通过多组测量数据,分析了预行程误差与测针杆长、测头运动速度及测量角度之间的关系。 相似文献
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虚拟式加工中心在线检测仪 总被引:1,自引:0,他引:1
设计了一种用于工件在线测量的虚拟式检测仪,从工件CAD图提取测量信息并自动生成检测宏程序,对测量数据分析后给出检测结果。对测头系统误差和评定算法误差进行了分析,提出了一种通过标定测头有效直径来补偿测头预行程误差的方法。对比验证后表明,虚拟式在线检测仪能进行较高精度的测量。 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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为提高零件的加工效率,实现数控加工后对产品质量的快速检验,提出了一种基于Power-INSPECT软件的在线检测方法。以典型的框类结构件为例,详细地阐述了检测数据点的生成、虚拟测量仿真和机床测量数据后处理等关键技术,并通过实际加工证明了该方法的有效性,提高了结构件数控编程的效率和质量。 相似文献
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This paper presents on-machine evaluation of surface form error components of a large-scale roll workpiece, including the out-of-roundness, the out-of-straightness, the taper angle and the diameter deviation, on a drum roll lathe. A pair of capacitive-type displacement probes is mounted on the carriage slide to target the two sides of the roll workpiece mounted on the spindle, which has a length of 2000 mm, a diameter of 320 mm and a mass of 350 kg. The outputs of the probes are employed to accurately evaluate the surface form error components through separating the influences of the motion errors of the spindle and the carriage slide of the lathe. It has been difficult to apply the reversal error-separation method for measurement of the out-of-roundness component of such a large workpiece because it is difficult to reverse the workpiece with respect to the spindle on the lathe due to its large size and heavy mass. An improved reversal operation technique, in which the spindle is rotated with respect to the stationary roll workpiece being held by a crane, is therefore proposed to solve this problem. Measurement uncertainty analysis is carried out to verify the reliability of the new technique for on-machine evaluation of the out-of-roundness component. The out-of-straightness component and the taper angle component of the roll workpiece are then evaluated by using a previously developed method. A simple and effective algorithm for evaluation of the diameter deviation component is also presented. 相似文献
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大型工件在制造过程中需要拆卸到坐标测量机上进行测量,造成效率低下、质量不易控制等问题。本文提出一种用于大尺寸工件在机视觉测量的图像拼接方法。将摄像机安装在数控机床上,通过控制机床工作台移动,摄取多幅图像,并对其进行高精度拼接。探讨了图像拍摄规则、重叠图像对的合理定义、角点提取和射影变换矩阵的计算问题。尺寸测量结果验证了该方法的有效性和高精度、高效率。 相似文献