HOT FORMING OF THE END WALLS OF CONE BODY PARTS

Pipeline system adapters are highly demanded parts in engine units. In pipeline systems operating in aggressive environments, these parts require the use of special non-ferrous alloys characterized by high strength. Their manufacture is very difficult. One of the options for their production is hot stamping of pipe elements under slow forming conditions. The article investigates the operation of forming an internal thickening on a thin-walled conical body blank. The purpose of forming the thickening is to prepare the end face of the adapter for pipeline systems, which is a truncated thin-walled one for further welding with other elements of pipeline systems. It is assumed that the formation of a thick edge is produced by partial upsetting of the end face of the blank. This operation was simulated in the DEFORM software package, during which an assessment was made of the effect of processing modes and the geometry of the working tool on the energy-power parameters of the process. It is assumed that the material of the blank is titanium alloy VT6. The material used assumes the implementation of the upsetting process in hot conditions under high-speed forming conditions, providing minimum forces and an optimal stress state of the workpiece. During upsetting, it is important to take into account the process parameters, such as pressure, temperature and speed, in order to minimize or avoid damage to the workpiece. A number of experiments were carried out, during which the influence of the cone angle, the working stroke of the tool, and the rate of deformation of contact friction were established. It was found that with the deformation scheme under consideration, the greatest influence is exerted by a change in the cone angle of the workpiece on the force, which is obviously associated with a change in the kinematics of the material flow at large cone angles.