DETERMINATION OF ENERGY PARAMETERS OF THE WIRE DRAWING PROCESS THROUGH DOUBLE DRAWINGS

Abstract

This study focuses on determining the wire drawing tension when the wire is pulled through double dies arranged in series without any intermediate storage devices. Significant wear of the drawing dies (spindles) is observed in the production of small-section wire by cold drawing. This leads to deviations in the finished profile in terms of both shape and size.To address this issue, it is necessary to improve the drawing technology by implementing measures to reduce die wear. To achieve this, technical and technological production factors must be considered.The main ways to increase the service life of the drawing tool are: using new wear-resistant materials to produce dies; reducing friction in the deformation zone using new lubricants and ensuring a stable lubricant supply; using vibration drawing and drawing with counter tension; ensuring an effective cooling process for the dies; using equipment to prepare the wire for drawing; and improving the drawing process.The main objective of this study is to analyse the stress-strain state of the metal during wire drawing with counter-tension, created by additional (rough) drawing. These studies will facilitate the development of rational drawing routes, reduce drawing wear and increase process productivity.Traditional wire production methods usually do not involve the use of counter-tension in finishing operations. An exception is direct-flow drawing mills that operate with counter- tension. On these drawing mills, counter-tension is created by adjusting the speed of the drawing drums. However, using counter-tension on other types of drawing mill will significantly impact the technical and economic performance of production.The results of the study show that using counter-tension during wire drawing creates additional tensile stresses in the metal. Creating elastic and elastic-plastic deformations from counter-tension reduces compressive stresses in the friction zone.