检索结果-南通市图书馆

fem simulation of Welding Quality in Porthole Die Extrusion

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2011年第2期26卷 293-296页

作者：和优锋 State Key Laboratory for Fabrication and Process of Nonferrous Metals General Research Institute for Nonferrous Metals

The effects of die structure such as the height of the welding,the welding angle and chamber the shape of the bridge on the welding quality of profiles were investigated by means of the commercial software DEFORM-3D.The numerical simulation results show that the welding quality of the hollow profiles has great sensitive to the die structure.With increasing the welding chamber height and decreasing the welding angle of the die leg can improve the welding quality.In addition,the welding quality index k of the new designed shape of the die leg is little down from 4.1 to 3.9 comparing the standard leg.

关键词： die structure welding quality fem simulation

3D fem simulation of Milling Force in Corner Machining Process

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2017年第2期30卷 286-293页

作者： Caixu YUE Cui HUANG Xianli LIU Shengyu HAO Jun LIU State Engineering Laboratory of High Efficiency Cutting andTool Harbin University of Science TechnologyHarbin 50080China

To optimize milling force and machining accuracy quality in corner milling process, the changing law of milling force is revealed by Finite Element Method（fem）. Based on DEFORM software a serial of 3D fem models for corner milling process are devloped. Tool curved trajectory is achieved by establishing accurate relationship of tool location with milling time. Adaptive remeshing technique and iterative algorithm are adopted to ensure convergence of fem model. Component force characteristics are revealed by analyzing fem simulation results. It indicates that the milling force in Y direction becomes negative comparing with forces in X and Z direction. Magnitude of forces in three directions decreases with increase of spindle speed, while it increases with increase of milling feedrate. The simulation results for cutting force are in good agreement with those obtained from experiment. The fem simulation model is first successfully established for corner milling process in this study, and the results provide a guide for optimizing cutting parameters in cutting process.

关键词： fem simulation Corner milling Hardened steel Milling force

fem NUMERICAL simulation OF THE SOFT MEDIUM TUBE EXPANSION PROCESS

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2000年第2期13卷 697-701页

作者： J.L. Song and W. W. Wang Taiyuan Heavy Machinery Institute, Taiyuan 030024, China

In this paper the soft medium tube expanding process of different loading case and tube sheet structure is simulated with fem. The expanding patterns under different conditions are obtained. The correction of the Sing... 详细信息

关键词： soft medium tube expansion fem simulation single-tube model

Multiphysics fem simulation of Contour Induction Hardening Process on Aeronautical Gears

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2012年第S1期19卷 95-98页

作者： M Spezzapria F Dughiero M Forzan A Candeo University of Padua Department of Industrial EngineeringVia Gradenigo6/A.35131 PadovaItaly Inova Lab srl Via Torino213.10040 LeiniItaly

Induction heating has been widely used by the heat treatment industry mainly in the wind-power and automotive sectors,in particular for hardening purposes,in a broad range of applications,its main advantages being the high repeatability and easy automation of the process,both factors leading to improved manufacturing efficiency and reduced CO;emissions.Though,traditional furnace-based case hardening treatments still represent the choice of reference when performance requirements are particularly demanding,either for the critical operating conditions or safety-related issues.The processes of CIH（Contour Induction Hardening）,compared to the traditional carburizing processes,allows to reduce the deformations after heat treatment.The main purpose of these treatments,as well as increases the surface hardness of the piece,is to induce compressive stresses in the superficial layer,improving the fatigue behavior.A multiphysics magneto-thermal simulation can be developed in order to calculate the temperature distribution in the gear,setting the input parameters such as currents,frequencies and treatment times.

关键词： induction heating gears hardening heat treatment fem simulation

fem simulation of Cold Roll Forming in the Car crash beam

在线全文

学校读者我要写书评

暂无评论

FEM Simulation of Cold Roll Forming in the Car crash beam

第六届材料与热加工物理模拟及数值模拟国际会议

作者： Liu Hua-min 1 Liu Zhi-qing 1 Zou Zhong-ping 2 1.Institute of roll forging technology Jilin University Changchun Jilin 130025 china 2.Hot Rolling Workshop of Strip And Plate Mill Laiwu Iron and Steel Group Co. Ltd Shandong Laiwu 271104 china

The cold roll forming process of car’s rubbing beam was simulated by MSC.Marc.The history-curves of the stress and strain of the special node were obtained and the deformations of the transition zone were analyzed.The simulation results show that as the metal sheet is bending,deformation changed from the elastic to plastic deformation,in each pass,the bending stress increased,then decreased,and after some fluctuation it tends to a steady state,from this point of view,Cold Roll Forming is a multiple loading and unloading process.

关键词： Rubbing beam Cold roll forming fem simulation

3D fem simulation of Precision Forging Automobile Clutch Damping Spindle Sleeve

在线全文

cnki会议

学校读者我要写书评

暂无评论

Computer Aided Drafting,Design and Manufacturing 2008年第1期18卷 73-76页

作者： LI Jian-guo, TANG Wen-cheng (Department of Mechanical Engineering, Southeast University, Nanjing 210096, China)

The precision forging process is simulated by commercial software Deform 3D using a rigid visco-plastic model to predict the status of metal flow and the distribution of equivalent plastic strain, providing guidance for making decision on the optimal choice of process parameters and mould structure. Trial forging was used to verify the effectiveness of fem simulation results.

关键词： fem simulation damping spindle sleeve precision forging mould design process optimization

3D fem simulation Analysis for the Residual Stress to GTAW Welded Joints Based on Adscititious Magnetic Field

在线全文

学校读者我要写书评

暂无评论

3D FEM Simulation Analysis for the Residual Stress to GTAW W...

The 2nd International Conference on Applied Mechanics and Mechanical Engineering(ICAMME 2011)

作者： Zhong Qilin Jiang Shuyuan Chen Huanming Liu Pin Institute of Aviation Manufacturing Engineering Nanchang Hangkong University

Aiming at adscititious magnetic field effect GTAW arc, decrease the maximum welding residual which by arc shape be changed, avoid the temperature excessive focus on welding pool, reduce temperature gradient and so on. Arc heat source model of GTAW under the magnetic field was established, also consider physical properties of materials varying with the temperature and the influence transformation, through the method of killing or activating elements treatment such as melting or solidification by welding pool, 3D fem simulation analysis for the temperature gradient and residual stress size distribution to GTAW welded joints compared to on magnetic field or not. The results show that maximum weld longitudinal residual stress and transverse residual stress were respectively reduced by 12.3% and 13.6% when compared to no magnetic field, also have blind hole measuring method measure welding residual stress, Test measurement and simulation values were basically consistent.

关键词： adscititious magnetic field welding residual stress fem simulation

RESEARCH AND fem simulation ON THE HYDROFORMING FOR REAR AXLE HOUSING OF LIGHT VEHICLE

在线全文

cnki会议

学校读者我要写书评

暂无评论

RESEARCH AND FEM SIMULATION ON THE HYDROFORMING FOR REAR AXL...

2006年中国机械工程学会年会暨中国工程院机械与运载工...

作者： LI Wei, WANG Chunyan, HAN Yingchun Autombile Engineering School, Jilin University, Changchun 130022, China

By using the technology of hydroforming and manufacture of the rear housing not only can saving material and energy resources, and also can bring about lightweight and improve the quality of products.

关键词： Rear axle housing hydroforming fem simulation parameters plastic stability.

THIN-WALLED TUBE PRECISION BENDING PROCESS AND fem simulation

在线全文

cnki会议

学校读者我要写书评

暂无评论

THIN-WALLED TUBE PRECISION BENDING PROCESS AND FEM SIMULATIO...

第四届海内外青年设计与制造科学会议

作者： Lin Yan Yang HeCollege of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072 P.R.China

＜正＞Wrinkling is one of main factors obstructing the improvement of production efficiency and product precision obtained in thin-walled tube bending process,so the prediction and prevention of the wrinkling are extremely important in the design of tooling and the determination of process parameters in the tube bending process.In this paper,the state-of-the-arts in the research and development of fem and wrinkling is first reviewed,and a method for the wrinkling prediction is then proposed.This method is a fem simulation method combined with an energy criterion.A strategy of how to solve some key problems related with the method is also presented in the paper.

关键词： thin-walled tube bending wrinkling fem simulation energy criterion