Applications of radial forging machine SKK-14 for hot and cold forging of pipes

The results of the research on the development of experimental technology for radial forging of pipes by plugless rolling on a mandrel with a radial forging machine (RCM) SKK-14 of Austrian company GFM are presented. To conduct the research the instruction manuals of GFM company for the installed radial forging machine (RKM) SKK-14 were used as well as the results of published experimental and theoretical research on the production of pipes by rolling and radial forging. The technical characteristics, technological capabilities, and the operating principle of the radial forging machine (RCM) SKK-14 for hot and cold pipe forging by plugless rolling on mandrel and without it are given. The recommendations for the drafting mode, machine parameters and requirements to it on the lubrication of mandrel and inner surface of the pipe before deformation are presented. The results of harnessing the advanced technologies of plugless rolling of pipes without mandrel as well as hot and cold forging of pipes on the mandrel are given. Recommendations to improve the tools, equipment, lubricants and technological modes of forging are described. The experience of seamless pipe forging with RCM SKK-14 is used in the design and implementation of production including piercing of workpieces with continuous plastic deformation, drilling by chip removal, hot and cold plugless rolling without mandrel, hot and cold forging on a mandrel. The promising applications of RCM SKK-14 of pipe forging in small-scale production of pipes for special purposes with fixed and variable external and internal diameters made of hard-alloy ferrous and non-ferrous metals with low plasticity are defined.