The Geometrical Parameters Optimization Based On The Same Attrition Of The Fir-Slot Milling Cutter

Fir-slot milling cutter is a tool to make the turbine rotors. The turbine rotor’s quality has an effect on mechanical properties. And making the slot is the most difficult step. Fir-slot milling cutter also is a complicated surface tool, which cutting edge often uses screw type. This special structure is enough to change the chip’s flow directions, and make the chips flow along the screw type slot. Thus it is to be benefit of heat dissipation, reducing drag and protecting the finished surface. In order to distribute the chipping allowance homogeneously and increase the lifetime of tools, it needs to ensure the profile accuracy and lines cross when we manufacture the fir-slot milling cutters. Based on the demands of smooth cutting and consistency, the cutters apply the helical structure when we process the slot. In the process of milling, it will appear the heavy cutting force on cutting surface and lead to the tool’s abrasion. Therefore, on the basis of cutting principle, we can work on the geometrical parameters optimization through studying the characteristics and specialty in the process of cutting. It is available to weaken the influence for cutter’s causes in the cutting environment.This paper will follow the academic achievement nowadays and deeply study the structure characteristics and primary geometric parameters of fir-slot milling cutter, and build the mathematical model of three-dimension milling force, for example the process of milling. On the basis of temperature profile in the two-dimension milling, we can build the desired thermomechanical fields on three-dimension milling. After studying the theory of abrasion which relates to the physical and chemistry, through comparing to the different abrasion types of tools, we build the equal abrasion model based on the different conditions of abrasion.Apply the geometrical modeling software of Pro/Engineer to build a3D model of fir-slot milling cutter based geometrical modeling theory. And import the3D model into nonlinear finite element analysis software of DEFORM-3D, we successfully make the finite element model of the cutter. On the basis of the cutting parameters and geometrical parameters, we use the software of finite element analysis of DEFORM-3D to finish a milling simulation. Through this process are studied, cutting force, milling temperature and residual stress in workpiece are achieved. Analyzing those causes which have the deep influence for milling force, temperature and residual stress in workpiece. Finally, on the basis of result’s comparison, we optimize the geometrical parameters of fir-slot milling cutter.