Experiments of axial ultrasonic assisted plane grinding of 2.5D orthogonal braided C/SiC ceramic matrix composites prepared by CVI+PIP synthesis process was carried out by electroplating diamond wheel. The processing technology of C/SiC composites was studied by analyzing and measuring the grinding force

three-dimensional morphology and roughness of grinding surface between ultrasonic-assisted grinding and conventional grinding. The results show that the material removal method is mainly based on brittle removal during the grinding process

the carbon fiber damage form is mainly fiber pulling

stripping

transverse fracture

and the matrix is mainly crushed and removed. After applying ultrasonic vibration

the grinding force was reduced by 35%–40%

and the surface processing quality is also significantly improved. Orthogonal experimental results show the influence of spindle speed

feed speed and grinding depth on the grinding surface roughness S a is also different in the grinding process parameters. The specific performance is: feed speed spindle speedgrinding depth

high-speed micro-grinding can be used effectively improve grinding efficiency and surface finish quality.