Холодная гибка стальных прямоугольных труб в трубогибе с проточкой специального профиля на фасонном валке

Abstract

Interest in large-scale industrial enterprises to technology bending of steel rectangular pipes is steadily increasing. The greatest distribution they received in the shipbuilding, power engineering, automotive and aircraft industry – for the manufacture of the frame elements of various steel structures, ships, airplanes, cars. Using the finite element method investigated the known method of cold bending for a certain range of steel rectangular pipes on pipe bender with special profile groove on the shaped roller, the ledge is located in the middle of special profile groove. For comparison of the results, simulation of forming was conducted for three values of ledge’s diameter. Subjected to deformation the rectangular pipes of steel 10. There’re identified dependence of the rectangular steel pipe bending’s moment of the angle of rotation of the shaped roller. Identified the final shape and size of the products obtained by cold bending, as well as stress-strain state and the degree of using of the resource of plasticity in deformed metall. There is a lack of corrugations, folds on the products and contact the side surface of the product with walls shaped roller, which ensures ease removal of product from the working zone of the pipe bender. Established increase efficiency of the process of cold bending of steel rectangular pipes on pipe bender with decreasing of value of ledge’s diameter on the working surface of the shaped roller.