Study on the Influence of Bending Angle of Multipoint Stretch-Bending of Profiles on Section Distortion of Parts

Abstract

The ABAQUS finite element simulation software was used to simulate the flexible 3D multipoint stretch-bending (MPSB) forming process of aluminum profiles. The influence of bending angle on the section distortion was investigated. The results show that the type of rectangular section distortion during horizontal bending and vertical bending is different. The bulging rate and the depression rate increase with the increase in horizontal bending angles; when the vertical bending angle is less than 15°, the depression rate of the horizontally curved section is effectively reduced. When α is equal to 30°, β is less than 15° which can effectively reduce the depression rate caused by horizontal bending to the profile. When α is less than 30°, the depression rate which is caused by horizontal bending can be reduced through the vertical bending angle, with 5° than 15°; the vertical bending process changes the distortion pattern of the profile; the depression rate and the bulging rate increase with the increase of the vertical bending angle. Through the support vector regression and selecting the parameter group c = 1.5, g = 0.05, the distortion rate of different angles in the common range is further expanded, and the quality control curve is drawn by combining the test results and prediction results which determine the depression rate as 2%, 2.5%, and 3% processing boundary. Using this curve to predict the distortion rate of the profile is instructive in the actual processing.

Influence of Contact Interface Friction on Plastic Deformation of Stretch-Bend Forming

“…With the wide application of the profile stretch-bend forming process in the processing of large-scale curved structural parts, a lot of research work has been carried out on this process by researchers from different countries. Liang et al [8] studied the influence of the bending angle of multi-point stretch-bend on the section deformation of the parts by using the ABAQUS finite element analysis method and predicted the forming quality control curve by the support vector regression method. Chen et al [9] analyzed the spring-back of multi-point flexible stretch-bend forming of Y-section profiles under different process parameters.…”

Adaptive Stretch-Forming Process: A Computer Vision and Statistical Analysis Approach

“…This process gradually produces severe plastic deformation (SPD) due to the increased stress; therefore, strain distribution must be considered [5]. As a result, the strain increases by a specific amount, depending on the mechanical properties of each material [6][7][8][9][10][11][12]. Another aspect is the deformation, since materials behave differently when elastic or plastic deformation occurs [2,13].…”

Influence of movement tracks on the forming quality of profiles fabricated by flexible stretch bending of multi-point roller dies technology

“…[15][16][17] This technology has received widespread attention due to its die surface reconfigurability and reusability in the forming process of different parts. 18 Liang J and Li Y et al 19,20 proposed a flexible three-dimensional stretch bending forming technology, which achieved a breakthrough in one-time forming of profiles from two-dimensional to three-dimensional deformation.…”