Influence of Different Type of Flash on the Open-die Forging
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In the open die forging,the type of flash has great influence on the process of forging.The process of forging a same part with different type of flash was simulated by DEFORM, a large simulation software,using a finite element method.By comparing the simulation results,the conclusion how diferent type of flash will influence the filling of the mold and the forging force is achieved.Cite
Wedge (geometry)
Titanium alloy
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The current forging technology and the design process of forging and its die for turbine blade were analyzed. The model of the die and forging stock was quickly generated by using CAD system of the die. The finite element model of a blade die forging was established. Die stress distribution, the forging load, offset force, deformation work and so on under the conditions of different forging angles and different forging allowances were analyzed by using Deform-3D software. Some of the results with the practical value were gotten, which has guiding significance to forging die design of the turbine blade.
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Based on the thermal-mechanical coupling model,the numerical simulation of die forging process for 7075 Al-alloy case forging was performed by rigid-plasticity finite element software DEFORM-3D.The influences of the starting forging temperature and deformation velocity in case forging forming process were investigated.The optimizing forging process parameters are starting forging temperature 450 ℃ and deformation velocity 2 mm /s.
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The filling capability of forging die is the key to design forging die and it exerts an important influence to the quality and life of die. In response to the difficulty in filling of forging die,and taking 2A12 aluminum alloy as the research object,the bar filling height after forging as the control objective,the finite element numerical simulation method was used to simulate the forging process. This test simulated the process of die forging,analysed the deforming behavior of the stuff and discussed the variety and distribution of temperature and strain。
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We propose an analysis model for simulating the detailed procedure of pore closing in open die forging of shafts. In the analysis model, an artificial symmetric plane is used, on which initial pores are located to be traced. The analysis model is employed to carry out three-dimensional simulation of pore closing in shaft free forging by both conventional free forging press and radial forging machine. With this result, two typical types of free forging equipment for manufacture of shafts are compared in detail. It has shown that the radial forging machine is much superior to the conventional open die forging press especially in pore closing under high hydrostatic pressure with sound strain.
Hydrostatic pressure
Hydrostatic equilibrium
Screw press
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Slab
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Using Forge 2D/3D forging finite element simulation software,the forging environment and deformation process of large forging case were simulated and analyzed.The influences of forging temperature,die design,forging equipment and other factors on the forging blank were discussed.The stress and strain,rule of metal flowing,forging flaw,metal lines,the final geometrical shape of finished forging,etc.during forging were analyzed.The important parameters,such as the weight of cropping,forging energy,heating times,die design,etc.in forging technology design were determined,which provide a reference for forging technology design in actual production.
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It is important to control the forging process of the integrated pressure vessel.A new forging process was developed in order to manufacture the integrated pressure vessel by the numerical simulation based on the deform-3D.In the process,a top die and a bottom die were designed which used to change the shape of the forging.Two different ways of forging by the top die were compared.The effective strain of the forging was analyzed after the simulation.The result shows that the new forging process is effective and have a good result for the forging which was consistent with the requirements.
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Hot forging + machiningis an effective way to manufacture spiral bevel gear.The final product's performance depends on the quality of hot forging.The finite element software Deform-3D was used to simulate the hot forging process of spiral bevel driven gear blank.The metal flow law of forging process was studied.The results show that the stress and strain are great and the temperature is high in the ladder place because of the metal flows difficultly in the ladder place.The flow of metal can be better by improving die parameters.The relationship between initial forging temperature and forging energy consumption was studied.The results show that the forging energy consumption changes a little when the initial forging temperature is different.The numerical simulation on forging technology can be applied to improve die patameters and forging process parameters.
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Bevel gear
Material Flow
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