DESIGN AND technological LIMITATIONS AT TUBE BENDING PROCESSES

A.I. Dolmatov, M.N. Bagmet, S.E. Markovich, I.A. Gdanov

In papers limitations at bending process use are defined, such as decrease of width of a walls and swelling of walls, ovality of cross-section and altitude of folds, wrinkling which appear on the constricted part at the tube bending. Influence of relative width of a blank on decrease of width of a walls is observed and a swelling of walls of tubes, the minimum radius of a bending of a pipe on an established tolerance on ovality is defined. The analytical model for cross-section of the bent pipe is resulted and influence of radius of the press tool, radius of a tube and width of a tube on process of formation of wrinkles is examined at tube bending.

Key words: tube bending, decrease of width of a walls and a swelling of walls, ovality of cross-section, altitude of walls, wrinkling, minimum radius of a bending.