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通过不同始锻温度、终锻温度和锻压方式的对比分析,进行了40CrVSr新型机床主轴的锻造工艺优化。结果表明:随始锻温度从1100℃增至1200℃或终锻温度从800℃增至850℃,主轴的耐磨损性能和热疲劳性能均先提高后下降;与上、下平砧的锻造方式相比,上平砧、下V型砧的锻造方式使主轴的耐磨损性能和热疲劳性能得到明显提高,其中25℃磨损体积减小61%,350℃磨损体积减小65%,热疲劳裂纹级别从7级变为3级。40CrVSr新型机床主轴的锻造工艺优选为:1150℃始锻温度,825℃终锻温度,上平砧、下V型砧的锻造方式。
Through different initial forging temperature, final forging temperature and forging comparison, the 40CrVSr new forging process optimization of machine tool spindle was carried out. The results show that the wear resistance and thermal fatigue properties of the main shaft first increase and then decrease with the initial forging temperature from 1100 ℃ to 1200 ℃ or the final forging temperature from 800 ℃ to 850 ℃. Compared with the upper anvil and the lower V-anvil forging, the wear resistance and thermal fatigue properties of the main shaft are obviously improved. The wear volume decreases by 61% at 25 ℃, the wear volume decreases by 65% at 350 ℃, and the thermal fatigue Crack level from 7 to 3. 40CrVSr new forging machine tool spindle optimization: 1150 ℃ initial forging temperature, 825 ℃ final forging temperature, the anvil, the lower V-anvil forging.