Temperature Prediction and Experimental Research of 2A14 Aluminum Alloy Milling
Aiming at the problem that the machining quality of 2A14 aluminum alloy decreases due to the increase of cutting zone temperature during milling.It is necessary to model the temperature field of workpiece milling in the process.In this paper,based on the dry-cutting temperature prediction model,a prediction model for the milling temperature field of 2A14 aluminum alloy is established based on the heat balance equation between chip,tool and workpiece by using the mov-ing and fixed heat source method proposed by Jeager and introducing a mirror image heat source.A non-standard thermo-couple consisting of 2A14 aluminum alloy and a k-type thermocouple(NiCr/NiSi)is calibrated by the semi-artificial ther-mocouple method,and the effective measurement range of the non-standard thermocouple is determined to be0℃ to 550℃.The milling temperature is measured under several sets of parameters,and the relative errors between the predicted and ex-perimental values are within 20％,which have a high accuracy and provided theoretical support for the actual milling process.
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