Experimental Research on Milling Temperature of New Cold Saw Blade Milling Cutter

Abstract

Based on the orthogonal test method and comparative study, the effects of workpiece material, workpiece diameter, milling cutter rotational speed and feed per tooth on milling temperature are investigated when cutting metal bars with new cold saw blade milling cutter. Then this paper reveals the change rule of new cold saw blade milling cutter milling temperature and the essential difference from the traditional hot saw blade milling cutter. Construction of sawing metal bar experiment system at production site, four-factor and three-level orthogonal test method is used to cut 45 steel, 40Cr and Q235B metal materials. The influence curves of workpiece material, workpiece diameter, milling cutter rotational speed and feed per tooth on milling temperature are obtained. By normalizing the experimental data, this paper uses the multiple linear regression method to fit the mathematical model of milling temperature. According to simulation analysis and experimental research, the milling temperature change rule of new cold saw blade milling cutter is obtained. Compared with the traditional hot saw blade milling cutter, the results show that under the same or similar conditions, the highest milling temperature center of new cold saw blade milling cutter is located at the bottom of the chip at a certain distance from the tip and the interface of the corresponding cutting layer adjacent to the bottom layer of the chip. The maximum milling temperature is around 300 °C, which is about 175 °C lower than the maximum milling temperature of traditional hot saw blade milling cutter. Further, it demonstrates that most of the heat generated by cold sawing is discharged from the cutting area along with chips, which keeps the milling cutter and workpiece at a relatively low temperature.