Study of Precision Formation on New Synchronizing Ring of Heavy-Duty Truck Based on Computer Numerical Simulation

2011 ◽  
Vol 189-193 ◽  
pp. 2317-2321
Author(s):  
Jie Chen ◽  
Xiu Mei Yang
Keyword(s):  
Numerical Simulation ◽  
New Product Development ◽  
Simulation Method ◽  
Friction Torque ◽  
Forming Process ◽  
One Step ◽  
Material Forming ◽  
Computer Numerical Simulation ◽  
The One ◽  
Processing Optimization

Synchronizing ring, an important component of automotive synchronizer, uses the friction torque generated on its conical surface to synchro-mesh the two meshing components to realize gear shift. In the paper the forming of the hot precision forging of the new synchronizing ring is analyzed based on the finite element numerical simulation method, which provides evidence for processing optimization and mould modifying to get an accurate blank. In addition, the one-step forming processing for the synchronizing ring is analyzed, and the flow of the material, forming process, flaw prediction and the optimization of the mould structure is studied as well. The result indicates that it is more reasonable of the distribution of the material and it is more satiation filled of the cavities. The cycle life of new product development is reduced greatly by forming process analyzing and flaw prediction of the synchronizing ring.

FAST SPRINGBACK SIMULATION OF BENDING FORMING BASED ON ONE-STEP INVERSE ANALYSIS

2008 ◽  
Vol 22 (31n32) ◽  
pp. 6057-6063
Author(s):  
YI-DONG BAO ◽  
WEN-LIANG CHEN ◽  
HONG WU
Keyword(s):  
Sheet Metal Forming ◽  
Metal Forming ◽  
Inverse Analysis ◽  
Simulation Method ◽  
Spring Back ◽  
Deformation Path ◽  
Bending Process ◽  
One Step ◽  
Implicit Solver ◽  
The One

A simplified one-step inverse analysis of sheet metal forming is a suitable tool to simulate the bending forming since the deformation path of bending forming is an approximately proportion one. A fast spring-back simulation method based on one-step analysis is proposed. First, the one-step inverse analysis is applied to obtain the stress distribution at the final stage of bending. Then, the unloading to get a spring back is simulated by LS-DYNA implicit solver. These processes are applied to the unconstrained cylindrical bending and the truck member rail. The spring-back and member rail widths at the several key sections are compared with experimental ones. It is well demonstrated that the proposed method is an effective way to predict the spring-back by unloading after bending process.

Study on the Large Module Spur Gear Cold Forming Process by Means of Numerical Simulation

2011 ◽  
Vol 189-193 ◽  
pp. 2642-2646 ◽  
Author(s):  
Qian Li ◽  
Yi Bian ◽  
Zhi Ping Zhong ◽  
Gui Hua Liu ◽  
Ying Chen
Keyword(s):  
Numerical Simulation ◽  
Simulation Method ◽  
Spur Gear ◽  
Cold Forging ◽  
Forming Process ◽  
Cold Forming ◽  
Forging Process ◽  
Flow Method ◽  
Precision Forging ◽  
Cold Precision Forging

The cold forging process of large module spur gear with four modules and 59mm breadth is performed by means of numerical simulation method. Two processes to forming such spur gears were compared by the simulation method, one is with the closed-die performing and extrusion in the finish-forging, the other is with divided-flow method in the finish-forging. Especially, the divided-flow method is analyzed in detail. The necessary reference and basis to realize practical cold precision forging process of spur gear with large modulus is provided eventually.

scholarly journals Numerical Simulation of One Step Block Method for Treatment of Second Order Forced Motions in Mass-Spring Systems

2021 ◽  
pp. 1-11
Author(s):  
J. Sabo ◽  
T. Y. Kyagya ◽  
W. J. Vashawa
Keyword(s):  
Numerical Simulation ◽  
Initial Value Problems ◽  
Second Order ◽  
Block Method ◽  
Initial Value ◽  
Mathematical Problems ◽  
One Step ◽  
Grid Points ◽  
The One ◽  
Mass Spring

This paper discuss the numerical simulation of one step block method for treatment of second order forced motions in mass-spring systems of initial value problems. The one step block method has been developed with the introduction of off-mesh point at both grid and off- grid points using interpolation and collocation procedure to increase computational burden which may jeopardize the accuracy of the method in terms of error. The basic properties of the one step block method was established and numerical analysis shown that the one step block method was found to be consistent, convergent and zero-stable. The one step block method was simulated on three highly stiff mathematical problems to validate the accuracy of the block method without reduction, and obviously the results shown are more accurate over the existing method in literature.

Numerical Simulation Techniques for Hollow Vacuum Forming of Double-Layered Plastic Sheets

2010 ◽  
Vol 154-155 ◽  
pp. 68-73
Author(s):  
Bin Gao ◽  
Bai Zhong Wu
Keyword(s):  
Numerical Simulation ◽  
Theoretical Calculation ◽  
Temperature Variation ◽  
New Products ◽  
Simulation Method ◽  
Simulation Software ◽  
New Materials ◽  
Forming Process ◽  
Simulation Techniques ◽  
Vacuum Forming

Products made from double-layered hollow vacuum forming are widely used for their various advantages. The hollow vacuum forming process has been studied in this paper. Numerical simulation method for the hollow vacuum forming process of double-layered plastic sheets has been introduced by the simulation software Polyflow, which is suitable for viscoelasticity fluid bodies. This method can vividly and intuitively estimate the thickness, temperature variation and distribution in the double-layered vacuum forming processes. Based on this method, reliably theoretical calculation data can be provided to design the reasonable vacuum forming process for double-layered vacuum forming of new materials or new products. The proposed method has been verified to be applicable and effective by prototype fabrications.

Study on Bladder Forming of the Shallow Basin-Shaped Aluminum Sheet Parts

2014 ◽  
Vol 599-601 ◽  
pp. 591-594
Author(s):  
Ji Lin Tu ◽  
Yong Jun Wang ◽  
Sheng Min Wei ◽  
Xiao Peng Hui ◽  
Chao Bin Qiu
Keyword(s):  
Structure Effect ◽  
Aluminum Sheet ◽  
Forming Process ◽  
Die Structure ◽  
Forming Analysis ◽  
One Step ◽  
Shallow Basin ◽  
The One

The shallow basin-shaped aluminum sheet part had buckling defects after the bladder forming. Analysis the buckling defects’ mechanism, according to these, we proposed one step bladder forming process, used rolling leveler which could reduced the buckling height to level sheet before bladder forming, and made experiments to compare the structure effect of buckling height among the four kinds of die structure. The results showed that the one step bladder forming process is valid, and used the original die with sheet edge fold when it was bladder forming.

Numerical Simulation of Sheet Deforming Caused by Laser Shocking

2004 ◽  
Vol 471-472 ◽  
pp. 860-864 ◽  
Author(s):  
Jian Zhong Zhou ◽  
Yong Kang Zhang ◽  
Dun Wen Zuo ◽  
Chao Jun Yang ◽  
Lan Cai
Keyword(s):  
Numerical Simulation ◽  
Sheet Metal ◽  
Simulation Method ◽  
Laser Shock ◽  
Forming Process ◽  
Laser Shock Forming ◽  
Simulation Results ◽  
A New Technique ◽  
Sheet Deformation ◽  
Abaqus Software

Laser shock forming (LSF) is a new technique realized by applying a compressive shock wave generated by laser shocking on the surface of sheet metal. It is a mechanical, not a thermal process. After briefly reviewing the mechanism of LSF, instead of previously reported experimental research, a numerical simulation method of sheet deforming caused by laser shock waves is presented. The process of laser-shock plastic deforming of sheet metal is simulated with ABAQUS software, the simulation results are compared and agree well with the experiments on the condition of single laser shocking. It is shown that numerical simulation is available for optimizing laser parameters and predicting the sheet deformation contour of laser shock forming process.

scholarly journals Numerical Simulation on Authigenic Barite Formation in Marine Sediments

Minerals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 98 ◽  
Author(s):  
Tianfu Xu ◽  
Songhua Shang ◽  
Hailong Tian ◽  
Keqi Bei ◽  
Yuqing Cao
Keyword(s):  
Numerical Simulation ◽  
Methane Flux ◽  
Simulation Method ◽  
Cold Seep ◽  
Anaerobic Oxidation Of Methane ◽  
Forming Process ◽  
Authigenic Minerals ◽  
Methane Leakage ◽  
Leakage Flux ◽  
Oxidation Of Methane

Submarine cold seep and its associated authigenic minerals in sediment are meaningful to indicate the existence of underlying natural gas hydrate. The anaerobic oxidation of methane (AOM) is coupled with sulfate reduction (SR) and influences the dissolution and precipitation of barite. However, the forming mechanism of barite is not yet clearly understood. In order to investigate the forming process of authigenic barite and its relationship with methane leakage flux, based on the measured data of the Qiongdongnan Basin in the Northern slope of the South China Sea, we constructed a 1D model of a sedimentary column to reproduce the formation of barite using the numerical simulation method. The results show that the original equilibrium of barite was broken by the cold seep fluids and Ba2+ was carried upward to the sulfate-rich zone leading to the formation of barite front. When there is no flux of methane from the bottom of sediment, the barite front disappears. The relationship between methane leakage flux and authigenic minerals was also discussed. It can be concluded that high methane flux corresponds to a shallow barite front in the sediment, furthermore, the barite content first increases and then decreases as the methane flux increases. At the same time, an inverse relationship between the ratio of authigenic barite to calcite and methane flux was obtained.

Spring-Back Control in Automotive Door Inner Panel Stamping

2014 ◽  
Vol 1063 ◽  
pp. 305-308
Author(s):  
Peng Zhang ◽  
Cheng Yong Wang ◽  
Zhi Bing Lu ◽  
Si Yan Wang
Keyword(s):  
Side Wall ◽  
Manufacturing Processes ◽  
Spring Back ◽  
Technical Issue ◽  
Forming Process ◽  
Automotive Body ◽  
Inverse Approach ◽  
Door Panel ◽  
One Step ◽  
The One

The spring-back defect of the front door inner panel is a major technical issue during the automotive body manufacturing processes. The primary purpose of this study is to control the spring-back value of the door inner panel by optimizing geometric parameters of addendum surface and selecting appropriate forming process. The Inverse Approach is employed to analyze the formability of the panel and to acquire rapid amendment of the die face design. Two kinds of forming processes are conducted, respectively, one-step forming method and two-step forming method. The results show that the one-step forming process combining with the optimized addendum surface can reduce the spring-back amount of side wall regions on door panel less than 2mm. The proposed optimizing scheme was verified by multiple trial-producing.

A New Method to Enhance the Accuracy of the Buckling Test Using Modified Yoshida Sample

2014 ◽  
Vol 1018 ◽  
pp. 199-206 ◽  
Author(s):  
Fei Han ◽  
Mathias Liewald
Keyword(s):  
Numerical Simulation ◽  
Metal Forming ◽  
Thin Sheet ◽  
The Other ◽  
Plastic Strains ◽  
Sheet Metals ◽  
Forming Process ◽  
Energy Theory ◽  
The One ◽  
Buckling Test

Because of the extensive use of thin sheet metals to reduce the weight of vehicles, wrinkling is becoming a more common and one of the most undesirable failures in the sheet forming process. Generally, experiments for studying wrinkling phenomena can be divided into two methods: actual forming of typical parts such as annular cup test on the one hand and the tests of specially designed sample geometries like the Yoshida Buckling test on the other. Recent experiments indicate that the plastic strains at the onset of wrinkling in the Buckling Test with Yoshida samples are too small to reflect reality of deep and stretch drawing conditions. Therefore, in this paper, in order to enhance the accuracy of the prediction of wrinkling, a new modified Yoshida specimen is provided for numerical simulation. The fundaments of the different buckling phenomena are going to be explained considering the energy theory in metal forming processes. Meanwhile, the influences of the changeable sample geometries in order to cause different stress distribution within loaded area of specimen have been investigated.

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