Method for analyzing rotary forging effect based on 3D constitutive model under alternating load

Abstract

The invention belongs to the technical field of mechanical manufacturing, and discloses a method for analyzing rotary forging effect based on 3D constitutive model under alternating load comprising the following steps of: performing 3D volume effect and surface effect analyzing on vibration rotary forging visco-elasticity plasticity constitutive model by using MATLAB software, then performing describing on three dimensional contact problem by simulating contact boundary in vibration rotary forging process through multi-parameter coupling; deriving viscoelasticity space matrix and viscoplasticity space matrix respectively by using generalized Hooke law in elastic mechanics and incremental theory in plastic mechanics, then establishing a surface effect analysis model in vibration rotary forging forming; performing finite element simulation analyzing and surface effect analyzing on the vibration rotary forging model under different vibration mode parameters through providing reasonable assumptions. According to the method for analyzing rotary forging effect based on 3D constitutive model under alternating load, vibration forging forming mechanism is disclosed, material vibration forging forming process analysis under the three dimensional constitutive model is perfected, and important theoretical significance and practical value are achieved for building vibration forging formingequipment.

Description

technical field [0001] The invention belongs to the technical field of mechanical manufacturing, in particular to a method for analyzing the rolling effect based on a 3D constitutive model under alternating loads. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] With the rapid development of the machinery manufacturing industry, people pay more and more attention to the precision forming technology of vibrating and oscillating rolling. Oscillating rolling has the characteristics of low energy consumption, high forming precision, low noise, and low investment, so it has been paid more and more attention by countries all over the world and has been more and more widely used in actual production. However, due to the complexity of its forming movement, people have not yet formed a regular understanding of the technology, and it is still a weak link in theory. The relevant production technology issues lac...

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Problems solved by technology

[0019] (1) In the establishment of the three-dimensional volume effect finite element analysis model, some errors will be caused by the division and selection of unit nodes in the model, which has a great influence on the solution of the viscoplastic stiffness matrix and the model, and needs to be further improved;

[0020] (2) In the process of deriving the viscoelastic stiffness matrix and viscoplastic stiffness matrix of the space problem, the creation of the contact assumption parameters will also introduce errors, which affects the accuracy of the calculation;

[0021] (3) During the MATLAB solution process, the number of iterations in the program is not enough, which causes the convergence value of the calculation result to be unsatisfactory;

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