Разработка и исследование технологии производства профилей переменного сечения

Abstract

A theoretical analysis of the deformed state of the metal of the profiles of a variable along the length of the section is carried out, and analytical dependences are obtained for determining the components of displacements and deformations. To ensure practical calculations on the theoretical dependencies obtained, the regularities of the change in the total angle of the bend along the length of the deformation center are determined, which most fully characterize the shaping of the workpiece during the profiling process. The length and shape of the deformation focus are specified. A technological process for manufacturing profiles of variable cross section length using conventional roll forming machines is proposed, which assumes the use of a special shaping and guiding device, the feature of which is the displacement of the roll elements along the axes of the worki ng rolls when profiling a section of variable cross-section. Experimental studies of metal shaping in the deformation zone and energy-force parameters of the technological process are performed. It is established in the work that the biasing force and the required drive power increase significantly with increasing thic kness of the workpiece and the angle of the bend per pass and decrease with decreasing wall width difference and increasing the length of the section of variable cross-section as well as with decreasing friction when moving elements move along the shaft.