科研之友
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摘要
To improve the forming quality of thin-walled tubes with small diameter bending radius in push-bending forming, and improve the rheological behavior of low melting point alloy as well as tube material during the push-bending process, the small-diameter thin-walled aluminum alloy tubes with 1D bending radius and with the filling medium of low melting point alloy was taken as the research object, and the ABAQUS finite element numerical simulation software was used to analyze the influence of uniform lubrication and differential lubrication on the flow of low melting point alloy and tube material to optimize the forming quality of bending tube, and the experimental verification was carried out. The results show that uniform lubrication can increase the straight end pushing out amount of tube. But the flow of the low melting point alloy and the tube material does not match, and the tube wall is difficult to fit the mold cavity.Differential lubrication can change the friction in different areas of tube blank and low melting point alloy.It is beneficial to regulate the reasonable flow of the tube material and the low melting point alloy, improve the distribution of tube wall thickness and the forming quality of elbow.
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