Research on Bending Forming Process of Rear End Bent Beam of High Speed Train Driver's Cabin
A study was conducted on the forming process of the main bending beam of the high-speed train driver's cab.The difficulties in bending and forming lie in the large cross-sectional size of the hollow profile,the large overall external size,the complex contour,the large radius curvature,and the high requirements for form-ing accuracy.In response to the forming difficulties,the forming steps of the main bending beam,the distortion trend of the forming section,and the rebound amount after forming were analyzed.A process plan was deter-mined to first perform tensile bending on the top of the main bending beam and then press bending on both sides of the columns.Process equipment(one set of tensile bending forming mold,one set of bending forming mold,and one set of contour inspection template)was developed,and the process parameters of the equipment(trac-tion force of the tensile bending machine and pressure of the press)were determined to ensure that the main ben-ding beam meets the technical requirements after bending and forming.The requirement provides a process refer-ence for the bending and forming of such aluminum profiles.
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