Abstract
A high temperature is produced in the process of precision milling of titanium alloy, and the cutting temperature can be effectively reduced by placing a micro-texture on the tool surface. In order to study the milling temperature of micro-textured ball-end milling cutter in milling titanium alloy under the combined action of a blunt radius with different edges and a micro-texture with different parameters, a new method based on micro-element theory and the generation and transmission of cutting heat has been established. At the same time, the influence of different radii of blunt edges on the milling temperature is simulated by the finite element method and experimentally verified to explore the influence of different radii of a blunt edge and micro-texture parameters on the milling temperature. Taking the milling temperature as the evaluation index, the optimum parameters of micro-circular pit texture are as follows: the diameter of micro-circular pit is 40 micron, pit spacing is 225 micron, distance from cutting edge is 100 microns, and radius of the blunt edge is 60 microns.
Highlights
Titanium alloys are widely used in various fields because of their high strength, corrosion resistance, and heat resistance properties
As the helix angle of the ball-end milling cutter with micro-texture used in this paper is zero, it is not necessary to consider the influence of helix angle on the variation of linear heat source
This paper mainly studies the influence of different cutting edge blunt radii and different micro-texture parameters on the milling temperature
Summary
Titanium alloys are widely used in various fields because of their high strength, corrosion resistance, and heat resistance properties. Sci. 2020, 10, 587 with different cutting radii of a cemented carbide cutter; the authors report that the cutting temperature increases with the increase of the blunt circle radius in the range of 0.02–0.1 mm. The blunt radius of the cutting edge and the micro-texture parameters are important in improving the machinability of titanium alloys and reducing cutting temperatures. The heat transfer process of the micro-textured ball-end milling cutter can be simplified as an intermittent heating process of the periodicity on the workpiece processing surface by the spiral heat source with variable length, non-uniform heat flux density, and constant change [12]. As the helix angle of the ball-end milling cutter with micro-texture used in this paper is zero, it is not necessary to consider the influence of helix angle on the variation of linear heat source. Each cutting element can be integrated and the influence of the cutting edge form on the cutting temperature can be obtained
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