scholarly journals Closed-Die Forging of Gear Like Element.(Dept.M)

2021 ◽  
Vol 20 (1) ◽  
pp. 33-52
Author(s):  
Mohamed Shabara ◽  
A. El-Domiaty ◽  
M. Al-Ansary
Keyword(s):  
Die Forging ◽  
Closed Die Forging

Slip Line Field Analysis of a Simple Plane Strain Closed-Die Forging

1989 ◽  
Vol 203 (2) ◽  
pp. 91-99
Author(s):  
M V Srinivas ◽  
P Alva ◽  
S K Biswas
Keyword(s):  
Velocity Field ◽  
Plane Strain ◽  
Slip Line ◽  
Field Analysis ◽  
Line Field ◽  
Slip Line Field ◽  
Die Forging ◽  
Closed Die Forging ◽  
Cavity Filling ◽  
Single Cavity

A slip line field is proposed for symmetrical single-cavity closed-die forging by rough dies. A compatible velocity field is shown to exist. Experiments were conducted using lead workpiece and rough dies. Experimentally observed flow and load were used to validate the proposed slip line field. The slip line field was used to simulate the process in the computer with the objective of studying the influence of flash geometry on cavity filling.

Three-Dimensional Analysis of Closed-Die Forging Processes: Part 1: Formulation

1989 ◽  
Vol 203 (1) ◽  
pp. 33-37 ◽  
Author(s):  
C F Lugora ◽  
A N Bramley
Keyword(s):  
Theoretical Model ◽  
Energy Dissipation ◽  
Metal Flow ◽  
Three Dimensional ◽  
Total Rate ◽  
Die Forging ◽  
Closed Die Forging ◽  
Proposed Model ◽  
Optimum Velocity ◽  
Forging Load

In this series of papers, a theoretical model based on the upper bound elemental technique is presented for prediction of forging load and metal flow in three-dimensional closed-die forging processes. Three basic elements are introduced in order to partition a forging into simple elementary regions. An optimum velocity distribution within the forging is obtained by minimizing the total rate of energy dissipation using a simplex optimizing procedure. Applications of the proposed model are discussed in Part 2.

Mechanics of Closed-Die Forging (Phase II)

1972 ◽  
Author(s):  
James R. Douglas ◽  
Taylan Altan
Keyword(s):  
Phase Ii ◽  
Die Forging ◽  
Closed Die Forging

A Research on the Cold Closed-Die Forging of Bevel Gears

2021 ◽  
pp. 27-32
Author(s):  
Pham Quang Trung ◽  
Nguyen Hoang Dung ◽  
Nguyen Nhat Minh
Keyword(s):  
Bevel Gears ◽  
Die Forging ◽  
Closed Die Forging

scholarly journals FAST-forge of Diffusion Bonded Dissimilar Titanium Alloys: A Novel Hybrid Processing Approach for Next Generation Near-Net Shape Components

Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 654 ◽  
Author(s):  
Jacob Pope ◽  
Martin Jackson
Keyword(s):  
Titanium Alloy ◽  
Flow Stress ◽  
Axial Compression ◽  
Microstructural Analysis ◽  
Bond Line ◽  
Small Scale ◽  
Compression Tests ◽  
Die Forging ◽  
Closed Die Forging ◽  
Near Net Shape

Material reductions, weight savings, design optimisation, and a reduction in the environmental impact can be achieved by improving the performance of near-net shape (NNS) titanium alloy components. The method demonstrated in this paper is to use a solid-state approach, which includes diffusion bonding discrete layers of dissimilar titanium alloy powders (CP-Ti, Ti-6Al-4V and Ti-5Al-5Mo-5V-3Cr) using field-assisted sintering technology (FAST), followed by subsequent forging steps. This article demonstrates the hybrid process route, firstly through small-scale uni-axial compression tests and secondly through closed-die forging of dissimilar titanium alloy FAST preforms into an NNS (near-net shape) component. In order to characterise and simulate the underlying forging behaviour of dissimilar alloy combinations, uni-axial compression tests of FAST cylindrical samples provided flow stress behaviour and the effect of differing alloy volume fractions on the resistance to deformation and hot working behaviour. Despite the mismatch in the magnitude of flow stress between alloys, excellent structural bond integrity is maintained throughout. This is also reflected in the comparatively uncontrolled closed-die forging of the NNS demonstrator components. Microstructural analysis across the dissimilar diffusion bond line was undertaken in the components and finite element modelling software reliably predicts the strain distribution and bond line flow behaviour during the multi-step forging process.

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.

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