Experiment And Simulation Research On Bending Springback Of Automobile Lightweight Aluminum Alloy AA6010

This article through to AA6010 aluminum alloy V-shaped bending springback experiments and finite element numerical simulation analysis, the use of two methods of range and variance of orthogonal experimental simulation results were analyzed to study the forming speed, sheet thickness, bending angle, the number of bending, blank-holder force and other process parameters on the influence of springback in sheet metal bending after unloading angle. For example, if we want the target angle 90 ° and 150°,describes the finite element simulation software Dynaform and use the mold profile compensation method, and ultimately determine the angle of the mold is 84.13° and 146.16°.Finite element simulation of orthogonal experiment results show that: in the larger molding speed range, with the increase of sliding speed, sheet metal bending springback angle after unloading gradually reduced, but the amount of change is small; as the sheet thickness and bending angle increases, the springback angle after unloading reduced, and the changes of the magnitude is big; as the number of bending increase, springback angle showing slightly decreasing trend on overall, but decreased marginally; with the blank holder force have a big change the experimental results springback angle also have a big change, blank holder force increases, the springback angle decreases. The range and variance analysis can be drawn: the blank holder force, bending angle, sheet thickness of the experimental results spring angle has a significant influence is an important factor; forming speed and the number of bending have little influence on the results of spring angle, it is a secondary factor.Under the optimal combination of simulate the maximum thinning rate is 6%-7%, springback angle only 0.936°, decrease obviously.V-shaped bending springback results showed that: when forming speed is less than 15 mm/s, with the forming speed increases, the springback angle becomes large; when forming speed faster than 60 mm/s, springback angle with forming speed increasing showed a gradual decreasing trend; a least plastic deformation may occur between 15 mm/s-60 mm/s, so that the maximum springback angle after unloading; as the sheet thickness and bending angle increases, the springback angle after unloading reduced, and the changes of the magnitude is big; as the number of bending increase, springback angle showing slightly decreasing trend on overall, but decreased marginally; in the second bend, has a relatively large change. The experimental results and simulation results are basically the same variation, optimal combination of parameters reduce the rebound, after the die surface compensation can achieve the desired angle.