On the issue of designing roller dies with staggered pairs of rollers

The paper presents the process of manufacturing round and shaped wire made of different metals and alloys. Parameters affecting the production quality were estimated, such as rigidity of the die design, precision of the mill setting, the workpiece stability in a calibre. The influence of the workpiece stability in a calibre was investigated. The dependence of the minimum distance between axial rollers was obtained. The influence of the diameter of the finished profile was estimated. Methods for determination of maximum possible distance between the axes of pairs of rollers were developed on the basis of the loss of the workpiece stability in the second calibre by using the system “circle-oval-circle”. Main stages of methods were presented, such as the force acting on the metal piece from the roller, the horizontal projection area of the deformation zone, the tilting moment acting on the workpiece, the maximum angle of the workpiece twist, the maximum length of the workpiece in the deformation zone. The influence on the maximum distance between the axes of pairs of rollers is shown. Ways of the application of dependences received are presented. The design of roller dies is presented and described. The design of roller dies is characterized by the possibility of using modular assembly and the simplified scheme of adjustment.