数控机床钻头的锻压工艺优化研究

Study on Optimization of Forging Process of CNC Machine Tool Bit

采用不同的始锻温度、终锻温度和锻比,对含锶数控机床钻头进行了锻压试验,并进行了表面硬度、高温耐磨损性能和高温冲击性能的测试与分析。结果表明,随着始锻温度、终锻温度、锻比的增加,钻头的表面硬度、高温磨损体积和高温冲击吸收功均先增大后减小。钻头的优化工艺为始锻温度1180℃、终锻温度950℃、锻比6。此工艺下,钻头的表面硬度达78 HRC,600℃磨损体积低至21×10^(-3)mm^3,600℃冲击吸收功高达58 J。

The forging test of CNC machine tool drill containing strontium was carded out by using different initial forging temperatures, final forging temperatures and forging ratios. And the surface hardness, wear resistance and impact property at high temperature were tested and analyzed. The results show that the surface hardness, wear resistance and impact property at high temperature firstly increase and then decrease with the increase of the initial forging temperature, final forging temperature and forging ratio. The optimized process of the drill bit is the initial forging temperature of 1180 ℃, the final forging temperature of 950℃ and forging ratio of 6. In this process, the hardness of the surface of the drill bit is 78 HRC, the wear volume of the bit is as low as 21×10^-3mm^3, and impact absorbing energy at 600℃ reaches to 58 J.