Investigation On Scheduling Method Of Steady Cutting Force Allowance For High Speed Machining

At the development of mechanical manufacturing industry, high speed machining plays a more and more important role as a comprehensive foundation technology. The high efficiency as well as the high accuracy it brings, are adapting the development of manufacturing industry. The requirement of production efficiency in automobile industry and the high hardness material precisely cutting in mold and aviation manufacturing industry etc. urge the vigorously development of high speed machining.There used to be constant feed rate and uniform allowance in traditional NC machining. But the cutting load varies in large extent when there is a variety in surface curvature, so this method does not fit for high speed machining. This paper analyzes the effect factors of cutting force in high speed machining, and investigates a steady cutting force allowance model faced high speed machining. The paper analyzes the key technologies on the foundation of steady cutting force allowance, and then designs a flowchart of its application. The steady cutting force allowance method makes a steady cutting load by optimizing the allowance not changing the feed rate.After analyzing the effect factors of the cutting force in peripheral milling, the paper establishes a steady cutting force allowance model. Machining the traditional uniform allowance work-piece and the steady cutting force allowance work-piece, and then collected the signal of cutting force. The experiment shows that, it's a steady cutting load machining process by using the allowance optimizing methods, and there is no need adjusting the feed rate. This method can achieve higher efficiency and higher machining quality, so it fits for high speed machining.For the quantification of allowance selection standard in peripheral milling processing, this paper analyzes the main effects of machining precision, and the result shows that form error is the most primary cause. Measuring the form error by coordinate measuring machine, the results show that the form error get the biggest value at the least curvature path place. By this analysis, the paper takes a response surface experiment, and synthetically analyzes the effect of cut depth, radial depth as well as feed rate on form error at the least curvature path place. On establishing the prediction model, the paper calculates the machining allowance.