Dry cutting is an effective way to repair ablations and cracks on the surface of ring network cabinet bushing.A single-factor test was used to investigate the effect of cutting parameters on cutting forces under uncoated,TiAlCrN-coated and TiAlSiN-coated tools.Based on the single-factor test,the Box-Behnken central combination test method was applied to conduct an experimental study on the cutting working parameters of ring network cabinet bushing using the TiAlSiN-coated tool with optimal performance.A three-factor and three-level quadratic rotational regression orthogonal test was conducted with cutting speed,feed and back cutting as the test factors and tool tangential force,axial force and radial force as the test indexes.By establishing the response surface mathematical model,the influences of each cutting process parameter on the cutting performance were analyzed,and the test factors were comprehensively optimized.The test results show that the significant order of cutting force is back cutting>feed>cutting speed.The optimal combination of parameters is cutting speed 94.589 m/min,feed 0.097 mm/r,back cutting 0.501 mm,and the tool tangential force is 11.75 N,axial force is 34.80 N,radial force is 19.53 N.The results of the validation test generally agree with the theoretical optimization values.