Method for determining cutting depth

The invention discloses a method for determining cutting depth. The method comprises the following steps: S1, carrying out cutting detection on a cutting material with certain mechanical characteristics, and recording the cutting depth A of each cutting and the stress layer depth B of the corresponding cutting surface; S2, on the basis of the cutting depth A and the stress layer depth B collected in the S1, constructing a cutting influence curve of the cutting material with the machining process as the transverse axis X and the machining allowance as the longitudinal axis Y; and S3, based on the cutting influence curve and the total machining allowance C, determining the cutting frequency of the part made of the cutting material, and ensuring that the sum of the cutting depth A and the stress layer depth B during each cutting is smaller than or equal to the remaining machining allowance after previous cutting. Under the condition that the surface integrity and the low stress level of a workpiece are guarantee