Study On The Milling Performance Of The Al₂O₃/Ti（CN） Composite Ceramic Tool

In machining, cutting is the most basic and reliable means of processing. The performance of the cutting tool material has a decisive influence on machining efficiency,surface quality, tool life and so on. In the modern machining, the ceramic tool material with its excellent heat resistance, wear resistance and chemical stability, plays an increasingly important role in the field of high-speed cutting and the materials which is difficult to machined. The indexable face-milling cutter, which has a high efficiency and is widely used in machining process. In this thesis,we focus on the Al2O3/Ti(CN) ceramic tool’s machining performance.This paper uses knowledge of materials and machining, basic on the single factor and orthogonal experiments, to explore milling speed, feed rate, depth of milling cutting, influence on the surface roughness, width of tool flank wear and the milling force. Establish the corresponding cutting force model, the surface roughness model, the width of flank wear model, and verify the model is significant or not; Explore the mechanism of the surface roughness formation, cutting force variation and tool wear mechanism. Use the Deform to simulation the cutting process. Through the deform we can establish the milling model, write down the cutting force and predict the milling temperature, it is proved that it plays some guidance in the actual milling.The results show that with the increase of milling speed, milling force first decreased and then increased, cutting force tends to minimize when the speed around the190m/min. With the increase of feed rate, cutting force decreased and then increased,when the speed come to8mm/min,the cutting force come to the minimum. With the increase of the cutting depth,the cutting force is increased also. Milling depth has the greatest impact on the cutting force, feed rate, followed, the milling rate is the least. With the increase of the cutting depth,the roughness of the work piece is increasing,it is same to the feeding speed, but when the cutting speed increase,the roughness became increased,then value will be decreased. When it reaches175m/min,the roughness of surface will become the best. Feed rate is the most significant factor to influence the surface roughness, milling speed followed,depth is the smallest factor.In this paper, there are three links, the theoretical research, experimental test and the simulation.Through this research, we can found a lot of advantages of ceramic tool, especially the failure of damage changed to wear, it is due to the toughness has been improved significantly, we can confirm that this type is adapt to cutting the difficult machined material. Pay attention to avoid the vibration.