Determination of preform shape to improve dimensional accuracy of the forged crown gear form in a closed-die forging process

2001 ◽  
Vol 43 (3) ◽  
pp. 853-870 ◽  
Author(s):  
Yohng J Kim ◽  
Naunit R Chitkara
Keyword(s):  
Dimensional Accuracy ◽  
Forging Process ◽  
Die Forging ◽  
Closed Die Forging ◽  
Preform Shape ◽  
Crown Gear

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.

Study of Isothermal Split-Die Precision Forging Process of High-Strength Aluminum Alloy Complex-Shape Forgings

2014 ◽  
Vol 941-944 ◽  
pp. 1761-1768
Author(s):  
Jun Lin ◽  
Feng Kang ◽  
Chuan Kai Hu ◽  
Qiang Chen ◽  
Zu De Zhao
Keyword(s):  
Complex Shape ◽  
Dimensional Accuracy ◽  
High Strength ◽  
Hydraulic Press ◽  
Geometric Configuration ◽  
Forging Process ◽  
Precision Forging ◽  
Die Forging ◽  
Calculation Results

Taking the geometric configuration of complex-shape forging into account, the isothermal split-die forging method, which is one multi-way die forging technology and can be operated on the general hydraulic press, is employed. The temperatures of billed and dies are 420°C and 380°C in the isothermal forging process. The coupled thermo-mechanical finite element method (FEM) is used to analyze the forging process. FEM calculation results show several folds had been formed in the final forging process due to unreasonable geometric configuration of preform. The folds mechanism is that direction of velocities become cross on the surface of billet, and the folds can be avoided if the direction would be kept convex. And then the preform is redesigned. A set of isothermal precision forming equipment is designed and manufactured. The experimental results verify the selected process and preform configuration. And all of the hardness, dimensional accuracy and surface quality of the forgings obtained by the equipments satisfy the requirements.

Development of a CAD/CAM system for the closed-die forging process

2003 ◽  
Vol 138 (1-3) ◽  
pp. 436-442 ◽  
Author(s):  
M Jolgaf ◽  
A.M.S Hamouda ◽  
S Sulaiman ◽  
M.M Hamdan
Keyword(s):  
Forging Process ◽  
Die Forging ◽  
Closed Die Forging ◽  
Cad Cam

scholarly journals Closed Die Forging Preform Shape Design Using Isothermal Surfaces Method

2020 ◽  
Vol 47 ◽  
pp. 268-273
Author(s):  
Nikolay Biba ◽  
Andrey Vlasov ◽  
Dmitry Krivenko ◽  
Alexey Duzhev ◽  
Sergey Stebunov
Keyword(s):  
Shape Design ◽  
Die Forging ◽  
Closed Die Forging ◽  
Preform Shape

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.

Preform design in axial hot closed die forging by isothermal surface method. Part 1. Overview of preform design methods. Theoretical aspects and algorithm of preform shape design

2021 ◽  
pp. 214-220
Author(s):  
A.V. Vlasov ◽  
D.V. Krivenko ◽  
S.A. Stebunov ◽  
N.V. Biba ◽  
A.M. Dyuzhev
Keyword(s):  
Simulation Software ◽  
Preform Design ◽  
Mathematical Basis ◽  
Design Algorithm ◽  
Forming Simulation ◽  
Die Geometry ◽  
Die Forging ◽  
Closed Die Forging ◽  
Trial And Error Method ◽  
Preform Shape

Methods of preform design in hot-die forging are analyzed. It is noted that despite numerous works in this fi eld, preform design is still often based on the trial-and-error method. The isothermal surfaces method for preform design is proposed and its mathematical basis is considered. The procedure for determining of the preform shape is given. The design algorithm uses the QForm metal forming simulation software to build isothermal surfaces and check in the quality of the designed die geometry by finite element modeling, as well as specially developed version of the QFormDirect CAD based on SpaceClaim™.

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