scholarly journals Numerical Simulation of Multistep Warm Extrusion Forming for the Outer Race of Universal Joint

2018 ◽  
Vol 11 (6) ◽  
pp. 162-168
Author(s):  
Liqin Shen ◽  
◽  
Michele Bellus ◽  
Keyword(s):  
Numerical Simulation ◽  
Universal Joint ◽  
Outer Race ◽  
Extrusion Forming ◽  
Warm Extrusion

scholarly journals Numerical Simulation and Process Optimization of Internal Thread Cold Extrusion Process

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 3960
Author(s):  
Hong-Ling Hou ◽  
Guang-Peng Zhang ◽  
Chen Xin ◽  
Yong-Qiang Zhao
Keyword(s):  
Numerical Simulation ◽  
Process Parameters ◽  
Orthogonal Experiment ◽  
Extrusion Process ◽  
Extrusion Temperature ◽  
Maximum Temperature ◽  
Cold Extrusion ◽  
Internal Thread ◽  
Bottom Hole ◽  
Extrusion Forming

In the internal thread extrusion forming, if the process parameters are not selected properly, the extrusion torque will increase, the extrusion temperature will be too high, or even the tap will break. In order to obtain effective process parameters under certain working conditions, this paper uses a combination of numerical simulation and process experiment to analyze the influence of the bottom hole diameter, extrusion speed, and friction factor on the extrusion torque and extrusion temperature. Through an orthogonal experiment, the significant influence law of different process parameters on the extrusion torque and extrusion temperature was studied, and the order of their influence was determined. Based on the optimal process parameters, numerical simulations and process tests were carried out, and the extrusion effect and related parameters were compared and analyzed. The results show that the extruded thread has clear contour, uniform tooth pitch, complete tooth shape, and good flatness. Compared with before optimization, the maximum extrusion torque has been reduced by 37.15%, the maximum temperature has been reduced by 29.72%, and the extrusion quality has been improved. It shows that the optimized method and optimized process parameters have good engineering practicability.

The Optimization Design Study of Warm Extrusion Forming Technology for Piston Head Semi-Processed

2013 ◽  
Vol 803 ◽  
pp. 375-378 ◽  
Author(s):  
Qing Qing Lv ◽  
Qi Ming Guan ◽  
Li Quan Yang ◽  
Xi Kui Wang
Keyword(s):  
High Performance ◽  
Optimization Design ◽  
Orthogonal Experiment ◽  
Range Analysis ◽  
Forming Process ◽  
Molding Method ◽  
Piston Head ◽  
Forming Technology ◽  
Extrusion Forming ◽  
Warm Extrusion

Aiming at the problems of high performance piston head can not produced by using casting and hot die forging, the warm extrusion molding method is proposed, based on the analysis of factors influencing for forming, rational scheme of orthogonal experiment was designed, a series of analysis for simulation results by using the range analysis method and comprehensive balance method, the optimal forming process parameters combination are identified, the optimal result are verified by the DEFORM software.

Numerical simulation of the 3D flow field in a ring die pellet mill considering viscous heating

2020 ◽  
Vol 11 (03) ◽  
pp. 2050025
Author(s):  
Yong-Mei Wang ◽  
Xiao-Peng Huang ◽  
Jin-Feng Wu ◽  
Wan-Xia Yang
Keyword(s):  
Numerical Simulation ◽  
Shear Rate ◽  
Flow Field ◽  
Velocity Shear ◽  
Viscous Heating ◽  
Powder Materials ◽  
Extrusion Force ◽  
3D Flow ◽  
Forming Process ◽  
Extrusion Forming

Viscous heating has a substantial influence on the extrusion forming process and product quality of powder materials. This study selected the MUZL420 ring die pellet mill as the research object, from which a 3D flow physical model was established. The numerical simulation of 3D nonisothermal flow in the extrusion pelletizing process of granulated alfalfa was performed with POLYFLOW. The distribution laws of pressure, velocity, shear rate, viscosity, viscous heating and temperature in the flow field were revealed to thoroughly investigate the pelletizing process and provide a reference for structural optimization and process control. The results showed that two extrusion zones in the pelleting chamber were symmetrical with respect to the center, and the significant pressure gradient along the rotating direction of the ring die and the roller caused the material to flow back in the opposite direction. There were larger velocity gradients, shear rates and viscous heating levels in the deformation and compaction zone, the negative pressure zone behind the extrusion zone and the die holes. The distribution of viscosity was opposite to that of the shear rate. The temperature increase area caused by viscous heating gradually expanded from the material inlet to the bottom of the extrusion chamber along the [Formula: see text]-axis direction, and the temperature increased accordingly. The extrusion force and the forming temperature in the extrusion forming zone were captured in the numerical simulation. The extrusion forming density was calculated with the regression prediction model established through the simulation experiment of pelletizing with a ring die. Through a comparison with the results of mean alfalfa pellet density from the ring die pellet mill experiment, the relative error was less than 5%, which indicated that the numerical simulation method was reliable.

Application of Numerical Simulation in Closed-Die Forging Forming for Universal Joint Fork

2013 ◽  
Vol 441 ◽  
pp. 435-438
Author(s):  
Jin Yang ◽  
Ping Wang
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Metal Flow ◽  
Dimensional Accuracy ◽  
Element Model ◽  
Universal Joint ◽  
Forming Load ◽  
Die Forging ◽  
Die Life ◽  
Closed Die Forging

A universal joint fork is one of the key parts of the automotive and tractor drive shaft system, which needs high requirements in dimensional accuracy and product quality. In this study, the numerical simulation analysis of closed-die forging of the universal joint fork was carried out using the rigid-visco-plastic finite element model. In view of formation, heat transfer and heating generation coupled, the variation rules of forming load, stress field and strain field were obtained. The numerical simulation results show that good process parameters conditions can effectively control forming load, enhance metal flow and improve die life.

Deform Based 1Cr18Ni9Ti Pipe Joint Upsetting Extrusion Process Finite Element Numerical Simulation Analysis

2013 ◽  
Vol 365-366 ◽  
pp. 1128-1131
Author(s):  
Zhi Yi Huo ◽  
Ying Zhi Li ◽  
Xiu Qian Sun ◽  
Qian Wang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Simulation Analysis ◽  
Extrusion Process ◽  
Forming Process ◽  
Element Analysis ◽  
Part Quality ◽  
Quantitative Basis ◽  
Extrusion Forming ◽  
Pipe Joint

Internal Defects are more likely to occur when 1Cr18Ni9Ti pipe joint are produced by traditional casting method or welding forming method, while the upsetting extrusion proposed in this essay can not only meet the part quality requirements, but also save material and shorten processing cycle. By numerical simulation analysis about part upsetting extrusion forming process with the finite element analysis method, we can obtain many index numerical values in part forming process, and therefore provide reliable quantitative basis for optimum design.

Research and Application of Warm Extrusion Forming Technology for Internal Combustion Engine Piston Head

2013 ◽  
Vol 706-708 ◽  
pp. 452-455
Author(s):  
Li Quan Yang ◽  
Qing Qing Lv ◽  
Lei Zhao
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Production Equipment ◽  
Forming Process ◽  
Piston Head ◽  
Forming Technology ◽  
Engine Piston ◽  
Extrusion Forming ◽  
Warm Extrusion

In order to improve the performance of the piston head on the existing conditions, and the warm extrusion forming technology was put forward based on the internal combustion engine piston head traditional production process. The warm extrusion process scheme and finite element boundary conditions was designed reasonable based on research the piston head forming process, the thermal-mechanical coupling model was established. The numerical simulation of the warm extrusion forming was carried out on the DEFORM software platform. The distributions of warm extrusion forming process strain field, stress field and temperature field were forecasted through the theoretical calculation and simulation. And the production equipment tonnage and die structure form were determined preliminarily. The possible problems of forming process were discussed, and the countermeasures were also put forward, provide the reliable reference for internal combustion engine piston head forming process improvement.

Numerical Simulation for Cold Extrusion of Bevel Gear

2012 ◽  
Vol 497 ◽  
pp. 356-364
Author(s):  
Qing Hua Yang ◽  
Jun Pan ◽  
Jun Xiong Zhang ◽  
Wen Biao Chen ◽  
Bin Meng
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Bevel Gear ◽  
Basic Knowledge ◽  
Cold Extrusion ◽  
Forming Process ◽  
Load Curve ◽  
Extrusion Forming ◽  
3D Software ◽  
Deform 3D

A three-layers assembled cavity die and its technological measures were designed for cold extrusion forming for the bevel gear. Numerical simulation of the cold extrusion forming process was applied using Deform-3D software, load curve, velocity field, stress field and temperature field were analyzed, thus obtain the basic knowledge of the law of the bevel gear deformation. Subsequent targets for optimization were introduced, aiming to solve the remaining problems of the current cold extrusion forming. The accomplished work shows some significance in guiding how to design a die and its technological measures.

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