Abstract: The stretch bend forming process of roof curve beam with stainless steel of rail vehicle was simulated by ABAQUS. The influence factors and control methods of the section distortion and the springback of L-section profile after bending were studied. Results showed that the vertical depth of the mold had great influence on the section distortion, while, the effect of stretching on the section distortion was relatively small. The wrap-elongation had the largest impact on the section distortion caused by the springback, the post-elongation had the largest impact on the side bending caused by springback. The mold surface compensation method could effectively reduce the springback, improve the accuracy of the contour. The experimental results showed that when the amount of pre-elongation and the amount of post-elongation were both 1%, the amount of wrap-elongation was 7.5%, the depth of the die was H-0.5 mm and the die surface amount was 1.1 times of the initial maximum springback amount, high quality stainless steel profile stretch bending parts could be produced.
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2017, Vol. 31 
