Bending of sheets and profiles on a four-roll machine for rocket bodies, tubular and frame products. Part 6
The theory and calculation of the parameters of the strain-stress state at the stages of pre-bending, calibration, straightening, bending of a straightened section and bending of the next section, taking into account the hardening of the workpiece on a roller machine, is developed. Deformations, stresses and forces acting on the workpiece from the rolls were investigated by CAD/CAE-modeling. Criteria for the formation of cracks, low accuracy and excessive springback of the workpiece after these stages of processing are determined. Recommendations for eliminating these defects are given. Keywords: sheet stamping, billet, bending, roller machine, pre-bending, calibration, straightening, CAD/CAEmodeling. [email protected]
2015 ◽
Vol 8
◽
pp. 1703-1712
◽
2018 ◽
Vol 54
(3)
◽
pp. 315-330
◽
2020 ◽
Vol 8
(1)
◽
pp. 082-089