Design, development, calibration, and testing of indigenously developed strain gauge based dynamometer for cutting force measurement in the milling process
Design, development, calibration, and testing of indigenously developed strain gauge based dynamometer for cutting force measurement in the milling process
复制标题
DOI：
10.15282/jmes.14.2.2020.05.0517
复制
发表时间：
2020-06-01
影响因子：
1.1
通讯作者：
Uddin, M. S.
中科院分区：
文献类型：
--
作者：
Mohanraj, T.;Shankar, S.;Uddin, M. S.
本工作设计并测试了一种基于八角形和方形环应变片的铣削测功机。应变仪与机械环相连，以检测加工过程中的变形。惠斯通电桥电路配备了测量仪，以获取由于加工时机械环变形而产生的应变作为电压。有限元分析（FEA）用于确定最大变形和应力的位置。确定环的方向和量规的位置以提高灵敏度并降低交叉灵敏度。然后，通过NI 6221 M系列数据采集（DAQ）卡获取切削力。测功机经过了一系列测试，以验证其静态和动态特性。根据基于 ISO 376 - 2011 标准的校准程序进行计量表征。通过基于田口L9正交阵列的铣削实验，用两个测力计测量切削力并记录结果。测量的切削力从300 N到550 N不等。所得结果表明低成本铣削测功机能够可靠地测量三分量加工力。总体而言，基于方环的测功机在线性度、交叉灵敏度（4%）、不确定性（0.054%）和固有频率（362.41 rev/s）方面提供了更好的静态和动态特性。
In this work, a milling dynamometer based on strain gauge with an octagonal and square ring was designed and tested. Strain gauges were attached with the mechanical rings to detect the deformation, during the machining process. Wheatstone bridge circuit was equipped with gauges to acquire the strain as voltage owing to the deformation of mechanical rings when machining takes place. The finite element analysis (FEA) was used to identify the location of maximum deformation and stress. The direction of rings and location of gauges were decided to increase the sensitivity and decrease the cross-sensitivity. Then, the cutting force was acquired through NI 6221 M series data acquisition (DAQ) card. The dynamometer had undergone a cycle of tests to verify its static and dynamic characteristics. The metrological characterization was performed according to the calibration procedure based on ISO 376 - 2011 standard. The cutting force was measured with both the dynamometers through milling experiments based on Taguchi's L9 orthogonal array and the results were recorded. The measured cutting force varied from 300 N to 550 N. The obtained results depicted that low-cost milling dynamometer was reliable to measure the three component machining force. Overall, the square ring based dynamometer provides the better static and dynamic characteristics in terms of linearity, cross-sensitivity (4%), uncertainty (0.054%), and natural frequency (362.41 rev/s).