Abstract
The process of drawing calibrated rolled products, taking into account the peculiarities of the state of the surface layer after shot blasting, used as surface preparation on new high-tech lines, requires studying the relationship between the structure of the deformation focus and lubrication conditions. The article presents recommendations on the choice of drawing geometry and the purpose of absolute compression when drawing round-section rolled products on the CDS 300/80 and DB 800/40 lines of EJP company, commissioned at the Magnitogorsk Hardware and Calibration Plant MMK-METIZ. To study the lubrication conditions, the indicator of the "effective length" of the metal contact with the fiber was used, which allows us to estimate the size of the lubricating wedge during drawing. The results of the operation of portages with different geometries, taking into account the lubricants used, are presented. The relevance of the work is due to the replacement of the traditional method of preparing the rolled surface with metal processing with shot.
Keywords:
Shot-blasting, surface, cold drawing, deformation zone, gauged bars, lubricant.