Abstract: Based on the high viscoelasticity nature of abrasive flow machining media and through the analysis of the normal forces and the number of cutting abrasive particles, a material removal rate model for finishing processing of high viscoelastic fluid abrasive is established. The definition and test method of cutting depth of material removal model is given. The tests of cutting depth coefficients of No Ⅰ fluid abrasive for 45 steel, T8 steel and Q235-A material are determined by tubular specimen. The results show that the material removal rate is positive propostional to wall pressure, wall slip speed and the cutting-depth coefficient. The abrasive particle size, abrasive and carrier mixing ratio, the elasticity of the fluid abrasive, the hardness and surface roughness of the work-piece are the determinative factors influencing cutting depth coefficient. And the cutting depth coefficient can be measured by the length and pressure of fluid abrasive flowing on a work-piece surface under the conditions of relatively high viscosity and large flow capacity.

Key words: machinofature technique and equipment, high viscoelastic fluid abrasive, material removal rate model, cutting-depth coefficient, abrasive flow machining