Prediction of sand mold cutting force and identification of cutting force coefficients

Abstract

Patternless casting technology is an advanced digital forming technology. Sand mold cutting is one of the most important techniques of patternless casting technology. In the process of sand mold cutting, the cutting force is the key factor affecting the quality of sand mold machining, and is an important prerequisite for the optimization of cutting parameters and the study of cutting stability. The accuracy of the cutting force prediction model depends largely on the identification of the cutting force coefficient. In the average cutting force model, the cutting force coefficient is considered as a constant. For identification of sand mold cutting force coefficient, a series of resin sand cutting experiments have been conducted in this paper, fixing spindle speed and depth of cutting, linearly changing the feed per tooth to measure the cutting forces, the tangential and radial cutting force coefficient are calculated by linearly fitting experimental data. The analysis results show that with the change of the cutting parameters the resin sand cutting force coefficient is basically the same.