烧结工艺对金刚石锯片切割性能和焊接性能的影响

Influence of sintering process on the cutting and welding performance of diamond saw blade

本文采用正交试验方法设计制造一组切割花岗石激光焊接圆锯片,通过切割试验和扳齿试验考察了烧结温度、保温时间和保压压力对锯片切割锋利度、切割寿命和焊缝破坏性扳齿力矩的影响。结果表明,烧结温度是影响锯片使用性能和焊接性能的最主要因素,当锯片烧结温度分别是790℃、820℃、850℃时,其最大切割速度分别为0.95 m/min、1.47 m/min、1.85 m/min,切割寿命分别是18.88 m、20.81 m、24.72 m,扳齿力矩分别是14.33 N.m、17.61 N.m、24.12 N.m;保温时间对三者的影响次之,当保温时间分别是40 s、80 s、120 s时,其最大切割速度分别为1.26 m/min、1.43 m/min、1.58m/min,切割寿命分别是19.69 m、22.16 m、22.56 m,扳齿力矩分别是16.85 N.m、19.0 N.m、20.20N.m;而保压压力对三者的影响最小,当保压压力分别是20 MPa、25 MPa、30 MPa时,其最大切割速度分别为1.47 m/min、1.43 m/min、1.37 m/min,切割寿命分别是20.96 m、21.26 m、22.19 m,扳齿力矩分别是16.69 N.m、20.30 N.m、19.06 N.m。指出,在实际生产中应重视烧结工艺参数的控制。

A group of laser welded circular saw blades for cutting granite were prepared by using orthogonal design method. The influence of sintering temperature, time and pressure on the cutting sharpness, life and welding performance was investigated by cutting test and pulling teeth inspection. It is shownthat the sintering temperature is the main factor affecting the cutting performance and the welding properties. When the sintering temperature is 790 ℃, 820 ℃ and 850 ℃, the largest cutting speed is 0.95 m / min, 1.47 m / min, 1.85 m/ min; the cutting life is 18.88 m, 20.81 m, 24.72 re;and the pulling teeth torque is 14.33 N·m, 17.61 N·m and 24.12 N·m, respectively. The second affecting factor is the temperature holding time. When the holding time is 40 s, 80 s, 120 s,the largest cutting speed is 1.26 m / min, 1.43 m / min and 1.58 m/min; the cutting life is 19.69 m, 22.16 m and 22.56m;the pulling teeth torque is 1.685 N·m, 19. 0N·m, 20.20N·m, respectively. While the affect of packing pressure is the least. When the pressure is 20 MPa , 25 MPa and 30 MPa, the cutting speed is 1.47 m / min, 1.43 m / min, 1.37 m/min;the cutting life is 20.96 m, 21.26 m, 22.19 m;the pull teeth torque is 16.69 N·m, 20.30N·m and 19.06N·m. respectively. It is suggested that the sintering parameters should be precisely controlled during the production.