Design and analysis of structure for milling OCr13 stainless steel with unequal tooth pitch plunge milling tool

Structural design of unequal pitch step plunge milling tool. According to the theoretical analysis of the primary tool parameters, the structure of the plunge milling tool is determined by designing and analysing the step structure, the rake angle and the main deflection angle of the plunge milling tool. The inter-tooth angle of the plunge milling tool is determined by Monte Carlo method and Fmincon tool tooth pitch optimization method. The constitutive model of stainless steel 0Cr13 material was constructed, and the simplified model was imported into Deform-3D software. After setting the corresponding parameters, the changes of milling force, milling temperature and tool wear of unequal pitch stepped plunge milling tool and common plunge milling tool were simulated. The simulation results were analysed by Deform-3D post-processing module, and the tool was prepared. The prepared tool was subjected to milling test and compared with Deform-3D simulation results. Then, according to the fuzzy matter-element theory, a fuzzy matter-element evaluation model was established for the plunge milling tool, and the values of milling force, acceleration, and tool wear were measured by milling test, and the milling performance was compared between the unequal pitch step plunge milling tool and the common plunge milling tool by the fuzzy matter-element evaluation method. Milling force, acceleration, and tool wear were reduced by 5%, 24%, and 15%, respectively.