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用多工序数控机床镗削高强度难加工合金,当孔的精度要求高(6—7级)时,会遇到很多的困难。因为切削用量和刀具运动轨迹事先编入了程序,镗削过程中就难以按精度要求对其修正。为了解决高强度钢38XH3MA、30XΓCHA、45XHMΦA(ΓOCT4543—71)镗削过程的控制问题,我们对硬质合金(T15Κ6和TT7Κ12)刀具的磨损值和磨损速度进行了研究。可用镗刀装有机夹三角形和正方形刀片,几何参数为:前角γ=0°—6°,后角α=6°和11°,主偏角φ=75°—90°,刃倾角λ=0°—6°,刀
With multi-process CNC machine tools boring high-strength difficult-to-alloy, when the hole accuracy requirements (6-7 level), will encounter a lot of difficulties. Because the amount of cutting and cutting tool movement programmed into the program in advance, boring process is difficult to correct its accuracy requirements. In order to solve the boring process control problems of the high-strength steels 38XH3MA, 30XΓCHA, 45XHMΦA (ΓOCT4543-71), we studied the wear values and wear rates of the hardened cemented carbide (T15K6 and TT7K12) tools. Boring machine can be used to hold the folder with a triangular and square blade geometry parameters: rake angle γ = 0 ° -6 °, rear angle α = 6 ° and 11 °, the main angle φ = 75 ° -90 °, cutting edge angle λ = 0 ° -6 °, knife