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With the high development of the motor industry, there is a great demand for precise and complex auto parts. New forging processes, material and energy saving processes are very important to the production of new type of auto parts. But forging mechanism is very complicated,and numerical simulation is the most effective method for analyzing the plastic deformation process. In this paper, several key...
DEFORM-3D software is a powerful simulation tool that uses the Finite Element Method to analyze the three dimensional complex forging process, It provides a virtual testing environment in which engineers can study the influence of geometric parameters, process parameters and other factors on forging process performance. This paper aims at the forging process of automotive starter motor ring gear,...
Rigid-viscoplastic finite element method is used to analyze precision forming process of the speed-reducer shaft of auto starter. And the varying rules of extruding forces, velocity, stress, strain as well as metal fluent regulation were obtained. The forming defects occurring in practice were predicted well. This research plays a guiding role on the simulation of the cold forging and the design of...
The work principles, failure modes, material selection, heat treatment process of rotary forging dies are researched in this paper. When working, the dies not only bears great pressure and long time high temperature, but also bears alternating stress caused by repeated heating and cooling which can easily lead to heat fatigue crack. Selecting proper die material and using appropriate heat treatment...
The service life of hot forging die is mainly decided by Stresses, including thermal, mechanical and combined stress. Stress amplitude is affected by the material properties, such as specific heat capacity. The choice of die material is very importance for improving die service life. In order to identify the effect of specific heat capacity on die stress, a 2D FE model of cake shaped workpiece is...
Stresses, including thermal, mechanical and combined stress, are the root causes leading to hot forging die failure. Stress amplitude is affected by the material properties, such as thermal expansion coefficient. In order to select die material for improving die service life, a 2D FE model is developed to analyze thermal, mechanical and combined stress of hot forging die with different level thermal...
The calculation of cogging torque for the SIPM machine is carried out based on the finite element analysis. It is shown that the cogging torque calculated by using virtual work method is close to each other under different meshes and contour models. However the calculation of the Maxwell stress tensor method is more sensitive to the mesh and contour model. So it is extremely important for the Maxwell...
In this paper, the use of the finite element method in conjunction with abductive network is presented to predict the maximum forging force and effective stress for strain-hardening material during near net-shape helical forging. The maximum forging load and effective stress are influenced by the material properties such as yielding stress, strength coefficient and strain hardening exponent. A finite...
This paper presents the analytical method and finite element method(FEM) for calculation of cogging torque in squirrel-cage induction motors. The analytical method is based on inductance coefficient and permeance wave technique, taking into account effects of slotting, saturation and winding connections. Based on finite element method, classical Maxwell stress method, modified Maxwell stress method...
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