A New Method of Cold Bending Forming of Profiles and Its Experimental Verification-Study on Non-Endpoint Measurement and Control Way

Through the comparison of relative merits of the existing two control methods of straightening anti-curve line and chord line measurement for cold-formed profiles, a three-fulcrum chord angle control method of non-endpoint measurement was proposed in this paper, and its feasibility was proved by using mathematical deduction. Using mapping method, the forming of shipbuilding profiles can be controlled by the only one set of orderly array chord angles and chord lines obtained by a spline curve of profiles, and meanwhile, the length of automation feedstock in forming process of profiles was explored. In order to validate the feasibility of the method, a bending simulation experiment of neutral-layer curve of profiles was performed. The results show that the curve shape of copper wires after bending basically coincides with the spline curve of profiles, thus verifying that the detection and control for forming of profiles by using the three-fulcrum chord angle control method are feasible. The present research achievements can provide a good theoretical basis for the further application on controlling profile forming with the chord angle measurement.