Improvement of technology for radial forging of rectangular profiles

Based on experimental studies of radial forging on RKM SKK-14 in strikers with smooth working surfaces, offset on pairs of mutually perpendicular strikers relative to each other along the forging axis by an amount exceeding the length of the working surface of the striker, a refined dependence has been proposed for determining the diameter of the workpiece when obtaining rectangular profiles. A new method of radial forging of rectangular profiles is described, in which the production of rectangular profiles is carried out by one pair of strikers with convex ridges, and a second pair of strikers with a smooth working surface, over several deformation cycles with the workpiece rotated after each deformation cycle by an angle of π/2. The effectiveness of using this method, confirmed by industrial experiments, is shown by increasing the transverse deformation of the metal, which makes it possible to reduce the compression and the displaced volume of metal when forming rectangular profiles from round initial blanks. A description is given of another method of radial forging of rectangular profiles, which eliminates the operation of turning the workpiece after each deformation cycle, with almost the same efficiency as the first method, which has been proven by industrial experiments. The essence of this method is to use one pair of strikers, forming a wide edge of a rectangular strip, with a special chevron shape of the working surface, and another pair of strikers with a smooth working surface. The proposed new technical solution is described with the implementation of an additional section on the strikers of a radial forging machine, adjacent to the working surface of the striker and located cantilever to its supporting surface, ensuring the direction of the deformable workpiece along the forging axis at the time of its insertion into the strikers. All developed technical solutions are applied in practice.