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Study on Extrusion Forming Technology and Experiment for Shaped Box of Special Vehicles

Author: HanKai
Tutor: ZhangZhiMin
School: University of North
Course: Materials Processing Engineering
Keywords: Aluminum alloy 7A04 Cabinet Isothermal extrusion Numerical Simulation
CLC: TG376
Type: Master's thesis
Year: 2009
Downloads: 72
Quote: 2
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Abstract


Production of a special vehicle with a box of the original method by casting or machining . Inevitable defects the the casting box parts in the casting process , a direct impact on vehicle performance ; machining steel box parts use to meet the necessary performance , material utilization is low , productivity is also low , does not meet the requirements of weight loss . Therefore, box processing and use special vehicles to carry out the aluminum box processing and applied research . Conditions of service and performance requirements based on the box , select OK 7A04 aluminum alloy material as cabinet manufacturing and discussion determined 7A04 aluminum alloy extrusion process parameters and heat treatment specifications . The box is a typical shaped parts , according to the characteristics of the shape of the box parts , combined with the 7A04 aluminum alloy forming characteristics , design Aluminum Alloy Case extrusion figure developed Aluminum Alloy Case forming process . Numerical Simulation of Aluminum Alloy Case forming process . In the simulation stage, the different coefficient of friction , the extrusion speed and the die structure, and examines the impact of the metal flow during extrusion and forming force . Finalize cabinet molding process parameters to optimize the forming process and die structure . Experimental trial results showed that the formulation Aluminum Alloy Case forming process and selection of process parameters is reasonable mold structure design is feasible , a successful trial to meet the requirements of the Aluminum Alloy Case . The performance test results show that the tensile strength of 7A04 Aluminum Alloy Case of 610 ~ 615MPa, yield strength of 550 ~ 560MPa meet the mechanical properties of the special vehicles with box and aluminum cabinet with cast steel cabinet contrast , weight to obtain a larger reduction to achieve the desired goal , the actual application of the good results .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Extrusion > Extrusion process
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