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Research on System of Thin-walled Tube Internal High-pressure Forming

Author: LiWenWei
Tutor: WangBingDe
School: Northeastern University
Course: Mechanical and Electronic Engineering
Keywords: Hydroforming Mold Performance parameters Stress and strain analysis Loading law Hydraulic system
CLC: TG394
Type: Master's thesis
Year: 2008
Downloads: 108
Quote: 0
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Abstract


The long-sought goal to reduce energy consumption in the automotive industry and other fields , to reduce the structural quality , but also one of the advanced manufacturing technology trends . Tube hydroforming technology as a variable cross-section of a hollow light body components lightweight and integration of advanced manufacturing technology , more and more people's attention . Currently, a large number of scholars to study this technology , however , due to a late start , and the lack of experimental conditions , so most of the research is only based on finite element simulation analysis , resulting in many research results can not be verified . Developed hydroforming system and its forming process has become an important issue in the current , the major significance of the development of China's automobile industry and energy conservation . Firstly, on the basis of access to a large number of domestic and foreign literature , summarized hydroforming technology and its development, current research and practical application conditions . Since then, according to the experimental needs , design a high forming die can be used to accomplish the different experiments . Magnitude of the uniaxial tensile test at room temperature , the tube of the mechanical properties of parameters and performance parameters with the draw speed variation , these laws hydroforming process , further analysis study of the hydroforming several loading law . This article also utilizes the elastoplastic mechanical theory , the stress-strain analysis of the tube forming process , and further understand the deformation characteristics of the tube , on this basis , the establishment of a hydroforming contact between the various process parameters . Bulging coefficient of the rotary member and member of rectangular cross-section is given definition proposed the hydroformed a design criteria as bulging coefficient . Obtained through theoretical derivation of the formula used to estimate the high-pressure initial forming pressure and the final shape of the pressure . Finally, analysis of the hydroforming process for the hydraulic system design requirements , the key issues involved in the hydraulic system , to finalize the forming of the design of the hydraulic system and electro-hydraulic control system .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > High-energy forming > High-pressure liquid molding
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