微细加工磨削温度的理论分析和试验研究

Theoretical Analysis and Experimental Study of Micro Machining Grinding Temperature

磨削温度在磨削力的研究和磨削加工过程监控中起到重要作用。通过理论计算和试验,研究了磨削区的最高磨削温度及热电偶测温技术。建立了3J33的三角形移动热源模型,通过Matlab拟合获得了3J33微细加工磨削弧区温度。试验采用对高弹性合金3J33马氏体时效钢进行平面微磨削加工,使用人工热电偶测量磨削表面的最高温度。通过对理论计算值与测量温度值进行对比分析,发现热模型理论的计算结果与试验结果基本一致。研究结果还表明,热电偶结的大小对信号的准确性有很大的影响。

The grinding temperature play an important role inthe study of grinding force and grinding process monitoring. In this paper,the highest temperature of grinding zoneandthe thermocouple measurement technology were studied by theoretical calculationandexperiment. The triangular moving heat source model of3J33 has established,through the M atlab fitting 3J33 micromachining grinding zone temperature was obtained. Experiment on high elastic alloy 3J33 maraging steel was micro plane grinding,using artificial thermocouple to measure the highest temperature of grinding surface. The calculated value was compared with themeasured temperature value,discovered that the theoretical results calculated using a thermal model are consistent with the experimental results. The results also showthat,the size of the thermocouple junction have a great impact on signal accuracy.