A Numerical Simulation Method for Analyzing the Structural Dimensions of Extrusion Dies with Unequal Lengths

A numerical simulation and structural size technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problem that the influence of metal rheology and temperature change behavior of unequal length working belts cannot be accurately obtained
CN103678772BInactive Publication Date: 2017-09-22INNER MONGOLIA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INNER MONGOLIA UNIV OF TECH
Publication Date
2017-09-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

A numerical simulation method for analyzing and optimizing the structural size of the unequal-length working belt of an extrusion die. The profile extrusion process is simulated. The die surface and the working belt are set as two independent entities, and the working belt surface and the extrusion direction are 1 to 2 For the slope working belt with an inclination angle of °, after the three-dimensional modeling is assembled, the grid is divided, and the split friction boundary condition is set. The conventional friction model is used between the deformed body, the inner wall of the extrusion cylinder, and the surface of the mold, that is, the shear with a constant friction factor is used. Friction model: Coulomb friction model related to pressure is adopted between deformed body and working belt surface. Apply extrusion process parameters in finite element software, generate data files, and carry out simulation analysis. The invention integrates methods such as split modeling, inclined working belt, split friction boundary conditions, etc., and solves the problem of separation or local contact between deformed bodies and surfaces of unequal-length working belts.
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Description

technical field

[0001] The invention belongs to the field of numerical simulation analysis, in particular to a finite element numerical simulation method for analyzing, designing and optimizing the structural size of the unequal-length working belt of an extrusion die. Background technique

[0002] With the rapid development of aerospace, rail transit, machinery manufacturing and other fields, the demand for special aluminum profiles with thin walls, large aspect ratios, and complex shapes is gradually increasing. As an important component in the above fields, this type of material is required to have high dimensional accuracy, shape and position tolerance and good comprehensive performance.

[0003] The production of special aluminum profiles by extrusion is currently the most feasible and even the only production and processing method. Reasonable matching of unequal length working zones of extrusion die cavity is the key to balance the metal flow rate of profile section o...

Claims

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