A 3D modeling method for titanium alloy variable pitch milling based on finite element

Abstract

The invention discloses a three-dimensional modeling method for variable pitch milling of titanium alloy based on finite element, which comprises the following steps: firstly obtain tool system parameters, material parameters of workpiece and tool, and formulate cutting process parameters; Based on the principle that the ratio of the radial angle between each tooth and the previous tooth is equal to the ratio of the corresponding feed rate per tooth, the geometric modeling of the milling cutter is carried out; the physical model, contact relationship and motion relationship between the milling cutter and the workpiece are established. Submit the work to the ABAQUS / Explicit solver for solution calculation; after obtaining the solution results, draw the milling force-time curve, milling temperature-time curve, or the stress and strain diagram of a specific node set. Since the helix angle of the milling cutter is considered in the present invention, it is closer to the real processing conditions, and the geometric modeling of variable tooth pitch is adopted, which can simulate the working conditions of different feeds per tooth at one time, saving modeling and calculation time .

Description

technical field [0001] The invention belongs to the field of finite element simulation analysis of metal processing, and more specifically relates to a three-dimensional modeling method for titanium alloy variable pitch milling based on finite element. Background technique [0002] Titanium alloy has a series of excellent physical properties such as low density, high specific strength, strong heat resistance, good low temperature performance and good corrosion resistance. It is widely used in many fields such as aircraft engine parts, rocket and missile structural parts. Among the hundreds of existing titanium alloys, Ti6Al4V accounts for nearly 80% of all titanium alloys because of its better heat resistance, toughness, plasticity, strength and biocompatibility. However, while having excellent properties, titanium alloy is also a typical difficult-to-machine material. Due to the characteristics of small deformation coefficient, high cutting temperature, serious chilling ph...

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Problems solved by technology

[0004] For the above defects or improvement needs of the prior art, the purpose of the present invention is to provide a finite element based titanium alloy variable pitch milling three-dimensional modeling method, wherein by selecting parameters, material constitutive model, tool geometry model Compared with the existing technology, it can effectively solve the problem that the single simulation is far from the actual processing situation and the repeated simulation is time-consuming, and can more accurately predict the mechanical parameters and surface integrity parameters of cutting under given process parameters. ; and the accuracy of single simulation is high, which can more intuitively simulate the process of 3D milling, improve the efficiency of milling simulation, and achieve the technical effect of reducing calculation costs

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