Study on closed-die forging technology and numerical simulation of T-junction of high-pressure pipe

2018 ◽  
Vol 28 (3) ◽  
pp. 439-448
Author(s):  
Wei ZHANG ◽  
Yandong YU ◽  
ZHONG LI ◽  
Junping LI
Keyword(s):  
Numerical Simulation ◽  
High Pressure ◽  
Pressure Pipe ◽  
Die Forging ◽  
Closed Die Forging

Numerical Simulation Analysis on Cold Closed-Die Forging of Differential Satellite Gear in Car

2008 ◽  
Vol 575-578 ◽  
pp. 517-524 ◽  
Author(s):  
Yao Zong Zhang ◽  
Jian Bo Huang ◽  
Xue Lin ◽  
Quan Shui Fang
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Simulation Software ◽  
Bevel Gear ◽  
Cold Forging ◽  
Forging Process ◽  
Die Forging ◽  
Closed Die Forging ◽  
Forming Defects ◽  
Deform 3D

The cold closed-die forging process of the gear is a kind of new technique of the precise forming of gear in recent years. In this paper, the cold closed-die forging process of differential satellite gear in car was analyzed through numerical simulation method. Forming mold was designed with Pro/E Wildfire2.0 which included four components : upper punch, lower punch, tooth shape upper die and lower die for Normal Cone. The three-dimensional models of satellite bevel gear mould were built and imported into numerical simulation software DEFORM-3D. Because the gear has the uniform circumferential features, in order to save time and improve the accuracy, only one tooth was simulated, and the full simulation outcome of 10 teeth was mirrored from this one. Through the numerical simulation analysis of DEFORM-3D, the instantaneous deformation and stress filed were gained. Forming defects were forecasted and the cold closed-die forging rule for satellite gear used in car was obtained which can provide effective references for no-flash cold forging process of planet bevel gear and the mold design.

Relations between numerical simulation and experiment in closed die forging of a gear

2006 ◽  
Vol 177 (1-3) ◽  
pp. 256-260 ◽  
Author(s):  
M. Skunca ◽  
P. Skakun ◽  
Z. Keran ◽  
L. Sidjanin ◽  
M.D. Math
Keyword(s):  
Numerical Simulation ◽  
Die Forging ◽  
Closed Die Forging ◽  
Simulation And Experiment

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.

Research on Closed Die Forging Process of Car Steering Knuckle

2008 ◽  
Vol 575-578 ◽  
pp. 204-209 ◽  
Author(s):  
De Ying Zhao ◽  
Lian Dong Zhang ◽  
Hui Xue Sun
Keyword(s):  
Numerical Simulation ◽  
High Energy ◽  
Extrusion Pressure ◽  
Forming Process ◽  
Forging Process ◽  
Dimensional Precision ◽  
Die Forging ◽  
Closed Die Forging ◽  
Plastic Forming ◽  
Die Extrusion

Steering knuckle, which has strict requirements with regard to dimensional precision and quality, is a key component in cars. Conventional plastic forming methods are involved with intricate procedures and high energy consumptions. Normally, a 40 MN hot die forging press or a 100 KJ electro-hydraulic hammer is required to produce the steering knuckle. Closed die forging, which is a new precision forming technology developed in recent years, has some virtues, such as good mechanical properties, easy to form and improving of metal plastic deformation. Aiming at Jetta steering knuckle in this paper, the technology of two forging steps in one heat is presented. This technology is mainly composed of precision pre-forging, which is a closed die extrusion with the extrusion belt, and open finish-forging. The pre-forging process and finish-forging process are numerically simulated using the FEM software DEFORM-3D. For the closed die extrusion forming process, which is the key component of the technology, some key problems were researched, such as the flowing and filling regularity, extrusion-belt length, punch size, punch movement, lubrication and the relationship between the clamping pressure and the extrusion pressure. For the finish-forging process, the flowing and filling regularity of the finish-forging part was studied to verify the correct shape and dimension of the pre-forging part. Numerical simulation with regard to the pre-forging process shows that the closed die forging can not only help to form the pre-forging part, but also decrease the extrusion pressure to be less than 8 MN, extend the mould’s service life and increase the utilization ratio of materials to be more than 75%. Numerical simulation of the finish-forging process shows that the pre-forging part design is rational. In addition, the forging experiments were carried out using the dies designed in particular. The experiments show that the technology is feasible and can markedly improve the mechanical property of the forging piece.

Study on the Cold Closed-Die Forging of Planetary Bevel Gears

2013 ◽  
Vol 803 ◽  
pp. 321-325
Author(s):  
Feng Kang ◽  
E Chuan Yang ◽  
Yan Bin Wang ◽  
Qiang Chen ◽  
Da Yu Shu
Keyword(s):  
Numerical Simulation ◽  
High Precision ◽  
Cold Forging ◽  
Dimensional Precision ◽  
Bevel Gears ◽  
Die Forging ◽  
Closed Die Forging ◽  
Die Stress

Taking the Planetary Bevel Gears as an object, the characteristic of cold Closed-die Forging was studied. By Using the FEM, the flowing rule of metal in the process of cold forging were analyzed, which is composed of dual-direction extrusion, upsetting and filling the gear form. The results show that each district of cavity was filled completely at the end of forging, without corner collapse, fold or crack. Taken the lower die as an example, the distribution of die stress was also analyzed. The results of numerical simulation were proved by the experiments, meanwhile the high precision and quality forging was formed. To the gears, the cold closed-die forging can not only ensure the dimensional precision, but also improve the capability of the gear, while obviously reduce materials consumption.

Influence of Rotation Speed on Cooling Uniformity of Seamless Pipe for Quenching

2010 ◽  
Vol 145 ◽  
pp. 371-379
Author(s):  
Guo Yong Liu ◽  
Dong Mei Zhu ◽  
Shao Jun Zhang ◽  
Shi Shan Hu ◽  
Mou Wei Li
Keyword(s):  
Numerical Simulation ◽  
High Pressure ◽  
Rotation Speed ◽  
Steel Pipe ◽  
Seamless Pipe ◽  
Pressure Pipe ◽  
Cooling Method ◽  
Inner Surface ◽  
The Impact ◽  
Seamless Steel

Based on the current cooling method commonly used to cool outer surface by constant (i.e. low)pressure pipe jet and inner surface by high pressure axial jet, the numerical simulation by FEM software –FLUENT was performed to study temperature field of seamless steel pipe for quenching. The impact of the rotation speed is investigated on the steel pipe axial, circumferential and radial cooling uniformity. The numerical results reveal that, with the steel pipe speed increased, the rotation speed has a little influence on axial cooling uniformity and great impact on circumferential and radial cooling uniformity. Cooling uniformity of steel pipe is better under the condition of the rotation speed of no less than 60 rpm.

scholarly journals Numerical simulation of cryogenic cyclic closed-die forging of Cu: hardness distribution, strain maps and microstructural stability

2019 ◽  
Vol 8 (1) ◽  
pp. 333-343 ◽  
Author(s):  
Danielle Cristina Camilo Magalhães ◽  
Allana Lauren Pratti ◽  
Andrea Madeira Kliauga ◽  
José Benaque Rubert ◽  
Maurizio Ferrante ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Hardness Distribution ◽  
Microstructural Stability ◽  
Die Forging ◽  
Closed Die Forging
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