A Research on Steel Synchronizer Gear Ring's Precision Forging

2008 ◽  
Vol 575-578 ◽  
pp. 226-230 ◽  
Author(s):  
Song Xue ◽  
Jie Zhou
Keyword(s):  
Forming Process ◽  
Forming Quality ◽  
Precision Forging ◽  
Manufacturing Procedure ◽  
Gear Ring

Precision forging is an important manufacturing procedure of steel synchronizer gear ring forming. FEM software DEFORM_3D was applied to simulate the forming process and the problems in the forming process were been solved. The important factors those influence on precision forming of steel synchronizer gear ring are studied and the results are verified in practice. The results show that the size of billet, forging temperature, and thickness of web strongly influence the forming quality of steel synchronizer gear ring.

Research on Catalyst Penetration Process of Patternless Casting Manufacturing Technique

2014 ◽  
Vol 609-610 ◽  
pp. 1515-1520 ◽  
Author(s):  
Wei Dong Yang ◽  
Zhan Qun Shi ◽  
Li Li
Keyword(s):  
Rapid Prototyping ◽  
Surface Quality ◽  
Dimensional Accuracy ◽  
Single Droplet ◽  
Forming Process ◽  
Penetration Process ◽  
Forming Quality ◽  
Main Factors ◽  
Sand Particles

Pattenless Casting Manufacturing (PCM) technique is a kind of Rapid Prototyping based on droplet injection, using discrete nozzle to jet the catalyst. The quality of scanning lines has the most important effect on the sand strength, its surface quality and dimensional accuracy. The penetration and curing rules of the catalyst in the resined-sand particles are the main factors to determine the shape of the scanning lines. In order to study the penetration rules of the catalyst in the resined-sand, the penetration process of a single droplet and scanning lines are analyzed theoretically and verified by experiments. The important parameters of the forming process are determined based on the research and experimental results. It will provide the foundation to improve the forming quality of PCM technique.

A Study into Spin-Forming Process of Internal Spline

2011 ◽  
Vol 305 ◽  
pp. 92-95
Author(s):  
Ling Yan Sun ◽  
Qin Xiang Xia ◽  
Xiu Quan Cheng ◽  
Bang Yan Ye
Keyword(s):  
Finite Element Analysis ◽  
Critical Issue ◽  
Product Formation ◽  
Forming Process ◽  
Element Analysis ◽  
Forming Quality ◽  
Forming Defect ◽  
Rotationally Symmetric ◽  
A New Technique

Spin-forming is a new technique for manufacturing the rotationally symmetric component with internal teeth, such as internal spline and gear. In order to optimize the spin-forming process and improve the forming quality of internal spline, the critical issue, the effect of spin-forming process on product formation was investigated by processing experiments and finite element analysis. The result indicates that it is the flow pattern of metal and friction force in the spin-forming that causes forming defect of product; two pass spin-forming helps to improve the homogeneity of deformation for metal with good plasticity; for internal spline forming, a stepped process is a better spin-forming process compared to a non-stepped one.

Effect of rolling parameters on forming quality of flat cross wedge rolling thread shafts

2020 ◽  
pp. 095440892095259 ◽  
Author(s):  
YiYu Shao ◽  
WenFei Peng ◽  
Xuan Yu ◽  
Moliar Oleksandr ◽  
Vyacheslav Titov
Keyword(s):  
Axial Force ◽  
Element Model ◽  
Helix Angle ◽  
Cross Wedge Rolling ◽  
Forming Process ◽  
Forming Quality ◽  
Rolling Parameter ◽  
The Right ◽  
Forming Angle

The flat cross wedge rolling is an advanced forming process, which is used to produce thread shafts. In this work, a finite element model of flat cross wedge rolling thread shafts was established by the DEFORM-3D, and the effect of the forming angle, spreading angle, helix angle and flank angle on forming quality are investigated. The research results show that the forming angle, spreading angle, helix angle have a significant influence on the position of the die wedge-in point. The angle designed wrongly makes the die wedge-in point unable to be aligned correctly, causing defects such as slipping in the process, repeated rolling of formed thread, thin or incomplete tooth shapes. The flank angle mainly makes an impact on the axial force. Reducing the right flank angle or increasing the left flank angle can effectively improve the imbalance of axial force to obtain high-quality thread shafts. Through the experiment of flat cross wedge rolling thread shafts, the data comparison demonstrates that the error of the external dimension of formed parts is small, proving the reliability of the rolling parameter selection.

scholarly journals Forming Quality Analysis on the Cold Roll Forming C-channel Steel

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1911 ◽  
Author(s):  
Xiangjun Hui ◽  
Xianming Wang
Keyword(s):  
Residual Stresses ◽  
Quality Analysis ◽  
Roll Forming ◽  
Cold Roll Forming ◽  
Forming Process ◽  
Empirical Formulas ◽  
Forming Quality ◽  
Cold Roll ◽  
The Web

Cold roll forming, as a metal plastic forming process, is still mainly used in industrial production by the trial-and-error method, which wastes a lot of time and materials. In this paper, the C-channel steel is taken as the research object. First, the empirical equations of forming passes are verified and analyzed, then the cold roll forming model of C-channel steel is established, the forming quality of each pass and the stress-strain distribution of the whole sheet metal are analyzed, and the validity of the model is verified by experiments. The residual stresses of the web zone and flange of the finished product were measured. The results show that the empirical formulas are still not universal and the forming quality of the bite zone is poor. It needs to be adjusted by improving the distribution of deformation. The external surface of the C-channel steel is undertensile stress, while the internal surface is undercompressive stress, and the residual stresses of the flange are far greater than those of the web zone. The research provides a reference for the design of the bite zone and the number of forming passes.

scholarly journals Study on the Influence Law of Forming Quality of Clinched Joint for Dissimilar Metal Sheet

2021 ◽  
Author(s):  
Qihan Li ◽  
Chuanwei Xu ◽  
Song Gao ◽  
Xiaoheng Han ◽  
Fenglei Ma ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Shear Strength ◽  
Process Parameters ◽  
Structural Parameters ◽  
Vehicle Body ◽  
Selection Strategy ◽  
Forming Process ◽  
Influence Of Process Parameters ◽  
Forming Quality

Abstract The clinched process of heterogeneous materials is more and more used in automobile, aerospace, and household appliances manufacturing. Traditional spot welding is easy to produce heat influence and damage material itself, which restricts the application and development for the hybrid structure of the vehicle body. This paper is based on the test of clinching. The cross-section morphology of clinched joints is observed. Based on the tensile test data and the requirements of the test die, the finite element model of the steel-aluminum clinched joint forming is established. The model is proved to be effective in the process of clinched forming. Based on the simulation model, the influence of process parameters (forming process parameters, Punch’s geometry parameters, and concave die structural parameters) on the forming quality of steel- aluminum clinched joint is analyzed. The evaluation of the joint after forming includes the critical dimension, deformation, and neck-lock ratio. Then, the strength of the steel-aluminum clinched joint was studied by tensile shear test. The law of strength change and the neck-lock ratio is analyzed. The selection strategy of different process parameters is studied. The results show that the forming process of the joint is predicted by numerical simulation, and the quality of the joint is sound. The neck-lock ratio of the joint with the highest tensile and shear strength is less than one and close to 1, that is, the joint with forming force of 40kN. The tensile strength and shear strength of clinched joint are higher than the design index (shear strength is 1700N, tensile strength is 700N). The tensile strength was increased by 125%, and the shear strength was 62.35%.

Optimization of Internal Pressure Loading Path for Tube Hydroforming of T-Shaped Tube Based on Dynaform

2014 ◽  
Vol 800-801 ◽  
pp. 703-707
Author(s):  
Shi Gang Wang ◽  
Shun Chen ◽  
Dan Wang ◽  
Wen Cai Xie
Keyword(s):  
Internal Pressure ◽  
Tube Hydroforming ◽  
Simulation Software ◽  
Loading Path ◽  
Pressure Loading ◽  
Forming Process ◽  
Forming Quality ◽  
Shaped Tube ◽  
Similarities And Differences

Take the T-shaped tube as the research object, studied the principles and theory. The paper researched the influence of single liner internal pressure loading path and bilinear internal pressure loading path and the gradient of internal pressure loading path on the forming quality of T-shaped tube with the help of FEA and DYNAFORAM simulation software. The paper researched the each method of forming process, and the relation between wall thickness thinning/thickening and the loading path of internal pressure, compared the similarities and differences. The results show that the gradient of internal pressure loading path is the best way, and the internal pressure should be increased growth rate in the pre-formed, so that get a small thickness reduction part.

scholarly journals Investigation of Electrically-Assisted Rolling Process of Corrugated Surface Microstructure with T2 Copper Foil

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4144 ◽  
Author(s):  
Shaoxi Xue ◽  
Chunju Wang ◽  
Pengyu Chen ◽  
Zhenhai Xu ◽  
Lidong Cheng ◽  
...  
Keyword(s):  
Grain Size ◽  
Size Effect ◽  
Copper Foil ◽  
High Efficiency ◽  
Grain Size Effect ◽  
Electrical Parameters ◽  
Forming Process ◽  
Forming Quality ◽  
Electrically Assisted

Electrically-assisted (EA) forming is a low-cost and high-efficiency method to enhance the formability of materials. In the study, EAF tensile tests are carried out to study the properties of T2 copper foil in an annealed state, and the effect of the electric current on the forming quality of corrugated foils is further studied in the EA rolling forming process. The result shows that the current reduces the flow stress and the fracture strain, which is different from the result of rolled samples. The joule heating effect on mechanical properties is significant in EA tension, and the softening effect of the surface layer can be observed at tensile strength, due to the grain size effect. Moreover, the current can weaken the grain size effect. In the rolling forming process, the influence of different electrical parameters on the forming height is remarkable, especially for the rolled T2 copper. The appropriate electrical parameters can improve the forming height, while keeping a small thickness thinning. Nevertheless, the high current density will lead to local rupture. This study proves that the current can improve the forming quality of the corrugated foils and is a promising surface texture forming process.

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