Closed Hot Precision Forging Process of a Bevel Gear with Large Cone Angle

2010 ◽  
Vol 154-155 ◽  
pp. 143-146
Author(s):  
Dong Sheng Ji ◽  
Xin Yun Wang ◽  
Lei Deng ◽  
Ju Chen Xia
Keyword(s):  
Cone Angle ◽  
Element Model ◽  
Bevel Gear ◽  
Optimal Process ◽  
Mechanical Coupling ◽  
Forging Process ◽  
Precision Forging ◽  
Simulation Results ◽  
Large Cone Angle ◽  
Reliable Basis

The closed hot precision forging process of a bevel gear with large cone angle was studied. According to the structure features of the bevel gear, two types of relief forging processes were proposed. First, simulations based on thermal-mechanical coupling finite element model were performed with Deform3D. Then the corresponding experiments were conducted and the results perfectly matched the simulation results. The advantages and deficiencies of two processes were discussed and a reliable basis for selecting the optimal process was proposed.

Numerical Simulation and Experimental Verification of Disc Cutter Rings in Die Forging Process

2021 ◽  
Vol 13 (1) ◽  
pp. 131-139
Author(s):  
Luhan Hao ◽  
Tao Wang ◽  
Kangping Fu ◽  
Zhengyang Zhao ◽  
Yun Chen ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Metal Flow ◽  
Element Model ◽  
Disc Cutter ◽  
Forging Process ◽  
Die Forging ◽  
Plastic Forming ◽  
Simulation Results ◽  
The Finite Element Model ◽  
Good Agreement

In order to study the forming law of the disc cutter ring in the independently researched die, the finite element model (FEM) of disc cutter ring for die forging has been established and the die forging process has been simulated by the plastic forming software. The metal flow field, temperature field, stress and strain field of the filling process were obtained by simulation. The exerted force of the die was also simulated and analyzed; thus, the die forging process was optimized. Based on the designed process parameters and simulation results, the experimental study on die forging forming of cutter ring was carried out. The comparison shows that the numerical simulation results are in good agreement with the experimental results, which proves that the die forging model of disc cutter ring in this paper is feasible.

A Design in the Optimal Precision Forging Process about Transmission Shaft Flange Yoke

2010 ◽  
Vol 44-47 ◽  
pp. 2832-2836
Author(s):  
Ying Tong
Keyword(s):  
Complex Shape ◽  
Hot Forging ◽  
Element Model ◽  
Decision Making Process ◽  
Forming Process ◽  
Forging Process ◽  
Precision Forging ◽  
Transmission Shaft ◽  
Forming Defects ◽  
Hot Forging Process

The rigid-visco-plastic finite element model for the hot forging process of transmission shaft flange yoke was established, and two forging schemes of different male die shapes were simulated. As for the present forming process, the forming defects were indentified and analyzed. Based on the simulating results the decision-making process was obtained, and a preforming die and a final forming die with proper structures and longer life were designed. The transmission shaft flange yoke part produced by this process is excellent in dimension tolerance and mechanical property. This process is profitable reference for producing the similar type of forks with complex shape.

Research on Prediction of Microstructure Evolution during Mobile Steering Arm Forging Process by FEM

2011 ◽  
Vol 130-134 ◽  
pp. 2326-2329
Author(s):  
Wen Lin Chen ◽  
Li Jing Peng ◽  
Yong Ma ◽  
Shao Yang Wang ◽  
Zhi Jie Li ◽  
...  
Keyword(s):  
Grain Size ◽  
Microstructure Evolution ◽  
Hot Forging ◽  
Element Model ◽  
Middle Part ◽  
Close Match ◽  
Forging Process ◽  
Simulation Results ◽  
Hot Forging Process ◽  
The Finite Element Model

In order to get high quality forgings, it is significant to predict the microstructure evolution during hot forging process accurately. In this study, a simulation model is built by combining FEM with the dynamic recrystallization model of 42CrMo, and the finite element model is proved to be reliable by a serial of upsetting deformation experiment. Then the distributions of microstructure evolution are obtained on upsetting process. Upsetting is beneficial to refine the grain size and drawing can make the distribution of grain size homogeneous. By comparing the simulation results with experiments, the distributions of microstructure are a close match in the middle part of steering arm. The forgings formed by this process have a good microstructure and have high comprehensive mechanical properties.

A Design in the Optimal Precision Forging Process about Half Axle Gears

2011 ◽  
Vol 230-232 ◽  
pp. 274-277
Author(s):  
Ying Tong
Keyword(s):  
Gear Tooth ◽  
Hot Forging ◽  
Influence Factors ◽  
Element Model ◽  
Forming Process ◽  
Forging Process ◽  
Precision Forging ◽  
Die Structure ◽  
Hot Forging Process ◽  
Main Influence

The rigid-visco-plastic finite element model for the hot forging process of half axle gear was established, and the enclosed-die forging processes with different process parameters were simulated. As for the present forming process, the main influence factors on precision forming quality were identified and analyzed. The results show that proper die structure and cavity dimensions, suitable web thickness and position can improve material filling effect, which ensures gear tooth dimensions.

scholarly journals Investigation of the Thickness Differential on the Formability of Aluminum Tailor Welded Blanks

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 875
Author(s):  
Jie Wu ◽  
Yuri Hovanski ◽  
Michael Miles
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Numerical Model ◽  
Plastic Strain ◽  
Finite Element Model ◽  
Equivalent Plastic Strain ◽  
Element Model ◽  
Dome Height ◽  
Tailor Welded Blanks ◽  
Simulation Results

A finite element model is proposed to investigate the effect of thickness differential on Limiting Dome Height (LDH) testing of aluminum tailor-welded blanks. The numerical model is validated via comparison of the equivalent plastic strain and displacement distribution between the simulation results and the experimental data. The normalized equivalent plastic strain and normalized LDH values are proposed as a means of quantifying the influence of thickness differential for a variety of different ratios. Increasing thickness differential was found to decrease the normalized equivalent plastic strain and normalized LDH values, this providing an evaluation of blank formability.

scholarly journals Numerical Simulation and Experimental Study on Axial Stiffness and Stress Deformation of the Braided Corrugated Hose

2021 ◽  
Vol 11 (10) ◽  
pp. 4709
Author(s):  
Dacheng Huang ◽  
Jianrun Zhang
Keyword(s):  
Numerical Simulation ◽  
Geometric Model ◽  
Equivalent Stress ◽  
Element Model ◽  
Maximum Error ◽  
Structural Features ◽  
Axial Stiffness ◽  
Frictional Stress ◽  
Maximum Equivalent Stress ◽  
Simulation Results

To explore the mechanical properties of the braided corrugated hose, the space curve parametric equation of the braided tube is deduced, specific to the structural features of the braided tube. On this basis, the equivalent braided tube model is proposed based on the same axial stiffness in order to improve the calculational efficiency. The geometric model and the Finite Element Model of the DN25 braided corrugated hose is established. The numerical simulation results are analyzed, and the distribution of the equivalent stress and frictional stress is discussed. The maximum equivalent stress of the braided corrugated hose occurs at the braided tube, with the value of 903MPa. The maximum equivalent stress of the bellows occurs at the area in contact with the braided tube, with the value of 314MPa. The maximum frictional stress between the bellows and the braided tube is 88.46MPa. The tensile experiment of the DN25 braided corrugated hose is performed. The simulation results are in good agreement with test data, with a maximum error of 9.4%, verifying the rationality of the model. The study is helpful to the research of the axial stiffness of the braided corrugated hose and provides the base for wear and life studies on the braided corrugated hose.

Study on Cold Precision Forging of Non Straight Wall Cavity Piston

2011 ◽  
Vol 311-313 ◽  
pp. 2348-2352
Author(s):  
Ming Ming Ding ◽  
Ju Chen Xia ◽  
Lei Deng ◽  
Jun Song Jin
Keyword(s):  
Element Model ◽  
Cold Extrusion ◽  
Forming Process ◽  
Rigid Plastic ◽  
Precision Forging ◽  
Straight Wall ◽  
Cold Precision Forging ◽  
Overall Performance ◽  
Traditional Processing ◽  
Machine Processing

Brake piston is a huge demand non straight wall cavity part for the typical automotive industry; the traditional processing method is machine processing, or preforming by cold extrusion, and then machining. In this paper, the combined cold precision forging method of cold extrusion and spinning was proposed, which might improve the overall performance of parts and reduce costs. The rigid plastic finite element model of cold extrusion and spinning was established to simulate the forming process. The results showed that the combined cold precision forging method was available to manufacture non-straight wall cavity piston.

scholarly journals Evaluation of Algebraic Iterative Image Reconstruction Methods for Tetrahedron Beam Computed Tomography Systems

2013 ◽  
Vol 2013 ◽  
pp. 1-14
Author(s):  
Joshua Kim ◽  
Huaiqun Guan ◽  
David Gersten ◽  
Tiezhi Zhang
Keyword(s):  
Computed Tomography ◽  
Iterative Reconstruction ◽  
Cone Angle ◽  
Iterative Algorithms ◽  
Projection Data ◽  
Reconstruction Algorithms ◽  
Reconstruction Methods ◽  
Large Cone Angle ◽  
Using Data ◽  
Dual Detector

Tetrahedron beam computed tomography (TBCT) performs volumetric imaging using a stack of fan beams generated by a multiple pixel X-ray source. While the TBCT system was designed to overcome the scatter and detector issues faced by cone beam computed tomography (CBCT), it still suffers the same large cone angle artifacts as CBCT due to the use of approximate reconstruction algorithms. It has been shown that iterative reconstruction algorithms are better able to model irregular system geometries and that algebraic iterative algorithms in particular have been able to reduce cone artifacts appearing at large cone angles. In this paper, the SART algorithm is modified for the use with the different TBCT geometries and is tested using both simulated projection data and data acquired using the TBCT benchtop system. The modified SART reconstruction algorithms were able to mitigate the effects of using data generated at large cone angles and were also able to reconstruct CT images without the introduction of artifacts due to either the longitudinal or transverse truncation in the data sets. Algebraic iterative reconstruction can be especially useful for dual-source dual-detector TBCT, wherein the cone angle is the largest in the center of the field of view.

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