Thermal forming wrinkling prediction and control method for a large complex thin-wall titanium alloy component

Abstract

The invention discloses a thermal forming wrinkling prediction and control method for a large-scale complex thin-wall titanium alloy component, and belongs to the field of basic non-cutting processingof metal plates, and the method comprises the following steps: step 1, establishing a hot pressing forming wrinkling prediction theory of the titanium alloy thin-wall component; 2, predicting an areawhere wrinkling may occur in the plate forming process; step 3, establishing a finite element simulation model for hot forming of the sheet metal part; step 4, determining a wrinkling area and a wrinkling reason; step 5, optimizing the shape of the original plate and the structure of the mold, and then performing analog simulation analysis; step 6, repeating the third step, the fourth step and the fifth step, and performing actual sheet metal part thermoforming production after the analog simulation result meets the technical requirements of products; and step 7, further optimizing the actualproduction result, and performing production again. By means of the method, wrinkling of the large complex thin-wall thermoforming titanium alloy component can be predicted and controlled, the rejection rate is reduced, the production efficiency is improved, and the production cost is reduced.

Description

Technical field [0001] The invention belongs to the basic non-cutting processing or processing field of metal plates or tubes, rods or profiles. It is a metal plate thermal calibration process, in particular to a large and complex thin-walled titanium alloy component hot forming wrinkle prediction and control method. Background technique [0002] Titanium alloy has high specific strength, high temperature resistance, corrosion resistance and other excellent properties, so it is widely used in the aerospace field. However, due to the poor plasticity of titanium alloy at room temperature, the large deformation resistance, cold forming of the sheet is difficult; therefore, hot press forming is the most commonly used process method for manufacturing titanium alloy sheet metal parts, especially for the manufacture of large, high-precision, complex structures Sheet metal parts. [0003] However, in the hot press forming process of sheet metal parts, when the material is deformed under t...

AI Technical Summary

Problems solved by technology

However, due to the poor plasticity and high deformation resistance of titanium alloys at room temperature, cold forming of sheets is difficult; therefore, hot press forming is the most commonly used process for manufacturing titanium alloy sheet metal parts, especially for large-scale, high-precision, and complex structures. sheet metal parts

[0003] However, during the hot press forming process of sheet metal parts, when the material is deformed under the action of the punch, part of the material will be fed radially, and some areas will be subjected to radial compressive stress. At this time, if the pressure of the die on the sheet cannot be When the displacement caused by compressive stress is effectively suppressed, the sheet will wrinkle

[0004] Although many researchers have analyzed wrinkling and established mechanical models of wrinkling instability, the prediction and control of wrinkling is still a major problem in the forming of thin-walled components, especially in the hot forming process of titanium alloy sheets. The strength of the titanium alloy is significantly affected by factors such as the strain rate and temperature of the material, making the wrinkling phenomenon of complex thin-walled titanium alloy parts more difficult to predict and control

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