亚博体育官网

亚博体育|即时比分|即时直播

登录    |    注册

您好,欢迎来到中国亚博体育资讯平台!

首页>《中国测试》期刊>本期导读>U型截面薄壁件丈量精度优化方法研究

U型截面薄壁件丈量精度优化方法研究

80    2019-09-28

¥0.00

全文售价

作者:王斌

作者单位:核工业理化工程研究院, 天津 300180


关键词:三坐标丈量机;薄壁件;温度弥补;丈量变形;丈量精度


摘要:

为提高三坐标丈量机在丈量一种U型截面薄壁件时的丈量精度,分别从温度和丈量力两方面研究精度优化方法。基于物体热膨胀效应的原子热振动原理分析铝合金资料的热膨胀影响因素,将温度影响引入丈量能力评估算法,得到可实施温度弥补的边界条件,利用Minitab对变温丈量实验数据进行分析并拟合出该薄壁件在径向方向上的热膨胀函数,实现在温度边界范围内对丈量结果进行精度优化;针对RDS XXT测头系统的内部构造,通过对测头结构进行力学分析并建立采点触发力学模型,确定该测头系统的采点触发模式为力矩触发,利用资料力学理论分析力矩触发模式下的被测件形变机理。测力及丈量截面位置交叉丈量实验结果表明:测杆长度越长,测力越小,且越靠近工件底部,丈量误差越小,丈量精度越高。


Measurement accuracy optimization method study of the thin wall piece with U shape section
WANG Bin
Research Institute of Physical and Chemical Engineering of Nuclear Industry, Tianjin 300180, China
Abstract: In order to improve the measurement accuracy of thin wall piece with U shape section by CMM, the precision optimization method is studied from two aspects of temperature and measuring force respectively. Based on the principle of atomic thermal vibration, the influence factors of thermal expansion of aluminum alloy materials are analyzed, the temperature influence is introduced into the measurement capability evaluation algorithm, the boundary conditions of temperature compensation can be implemented, the experimental data of variable temperature measurement are analyzed by Minitab, and the thermal expansion function of the thin-walled parts in radial direction is fitted. The temperature compensation of the measurement results can be realized within the temperature boundary range. Aiming at the internal structure of the RDS XXT probe system, through the mechanical analysis of the probe structure and the establishment of the mining point trigger mechanical model, it is determined that the picking point trigger mode of the probe system is torque trigger. Based on the theory of material mechanics, the deformation mechanism of the measured parts under the torque trigger mode is analyzed, and the experimental results show that the measurement accuracy can be improved effectively by selecting the length of the measuring rod and measuring the height of the cross section reasonably.
Keywords: CMM;thin wall piece;temperature compensation;measuring deformation;measurement accuracy
2019, 45(9):21-26  收稿日期: 2019-03-11;收到修改稿日期: 2019-05-08
基金项目:
作者简介: 王斌(1982-),男,天津市人,高级工程师,硕士,研究方向为精密测试技术
参考文献
[1] 张国雄. 三坐标丈量机[M]. 天津:天津大学出版社, 1999.
[2] 罗哉. 关节臂式坐标丈量机丈量力误差分析及弥补[J]. 仪器仪表学报, 2017(5):1159-1166
[3] YOUNES E, ABDERRAZAK E O, AHMED C. Experimental investigation of dynamic errors in coordinate measuring machines for high speed measurement[J]. International Journal of Precision Engineering and Manufacturing, 2018, 19(8):1115-1124
[4] HUSSAIN M, GU J, ENGEL R, et al. Designed experiment to find the optimal combination of the factors for the coordinate measuring machine (CMM) to measure cylindricity of engine cylinder bore[C]//International Conference on Industrial Engineering & Operations Management, 2015.
[5] VALKOV S, NEOV D, BEZDUSHNYI R, et al. Study of the microstructure, crystallographic structure and thermal stability of Al-Ti-Nb alloys produced by selective electron beam alloying[J]. Journal of Surface Investigation:X-ray, Synchrotron and Neutron Techniques, 2018, 12(3):436-441
[6] KOMPAN T A, KONDRATIEV S V, KORENEV A S, et al. Measurement of the thermal expansion coefficient for ultra-high temperatures up to 3000 K[J]. International Journal of Thermophysics, 2018, 39(3):40
[7] 程湘红. 三坐标丈量机丈量误差分析及处理[J]. 工程技术研究, 2018(1):113-114, 160
[8] LAAOUINA L, NAFI A, MOUCHTACHI A, et al. Application of CMM separation method for identifying absolute values of probe errors and machine errors[C]//International Conference on Engineering & Mis, 2016.
[9] PAN F, NIE L, BAI Y, et al. Geometric errors measurement for coordinate measuring machines[J]. IOP Conference Series Earth and Environmental Science, 2017, 81(1):012117
[10] KALUS J, JORGENSEN J K. Measuring deformation and mechanical properties of weld lines in short fibre reinforced thermoplastics using digital image correlation[J]. Polymer Testing, 2014, 36:44-53
[11] 丁鸿章. 工程金属资料热膨胀系数的计算[J]. 浙江工业大学学报, 2000, 28(4):358-366
[12] 黄晓明, 孙杰, 李剑锋, 等. 7050-T7451铝合金预拉伸板材热膨胀系数变更规律及机理[J]. 中国有色金属学报, 2013(12):3282-3288
[13] 刘育楠, 董学军, 刘红刚, 等. 三坐标丈量机测头系统精度验证方法研究[J]. 工业计量, 2016, 26(6):41-45
[14] 邵竑文, 孟亮, 刘斯宇. 论丈量力对几何尺寸丈量结果的影响[J]. 计量与测试技术, 2015, 42(12):52-54
[15] 李志渤, 黄强先, 赵剑, 等. 接触丈量中的微探球力变形研究[J]. 中国机械工程, 2014(14):1126-1129
[16] 熊伟, 葛志华, 唐威, 等. 轮毂轴承接触应力及变形量计算与分析[J]. 机械工程师, 2018(10):119-121
[17] 邱江月, 夏金利. 探讨丈量力对测试结果的影响[J]. 工业计量, 2010(2):365-366