基于软性磨料流的Preston方程kp参数的修正与测定

通过将流体磨料充满圆孔工件中,用活塞推动磨料在圆孔中流动,活塞挤压一个行程为一个循环。同一工件用同一种流体磨料循环加工,对同一点可测试其直径的变化量;并将此测量点的直径变化量代入修正过的基于软性磨料流加工微孔的Preston方程的k_p参数公式;并对不同质量分数下的软性磨料流基于Preston方程的k_p参数进行了测定与计算。通过分析不同质量分数下的软性磨料流的k_p参数,得出:随着磨料质量分数的提高,软性磨料Preston方程的k_p参数也随之不断增加,表现为对微孔表面的材料去除能力也越来越强。随着磨料质量分数的提高,软性磨粒流的材料去除率越大。

Modification and Determination of the Preston Equation kp Parameter Based on Soft Abrasive Flow

In this paper, the fluid is filled with round hole in the workpiece, the piston is used to push the abrasive flow in the circular hole, and the piston is squeezed by one stroke for one cycle. The same workpiece with the same fluid abrasive cycle processing, the same point can test the diameter of the amount of change. And the change of the diameter of the measuring point is substituted into the modified kp parameter formula of the Preston equation based on the soft abrasive stream. The soft abrasive stream under different mass fraction is measured based on the kp parameter of the preston equation and Calculation. By analyzing the kp parameters of the soft abrasive flow under different mass fractions, it is concluded that the kp parameter of the Preston equation of the soft abrasive increases with the increase of the abrasive mass fraction, which shows the material removal ability on the microporous surface More and more strong. With the increase of the abrasive mass fraction, the removal rate of the soft abrasive grain is larger.