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УДК 621.73.016

 

Klisko A.

National Technical University of Ukraine «Kyiv Polytechnic Institute», Kyiv, Ukraine ( This e-mail address is being protected from spambots. You need JavaScript enabled to view it )

 

THE RESULTS OF COMPUTER SIMULATION OF FORMATION OF FLANGE AT ROTARY FORGING WITH ACTIVE FORCES OF FRICTION

 

Based on computer modeling determine Destinations of rational application process of rotary forging in conjunction with the active forces of friction. Design/methodology/approach. Purposeful formation of contact friction force provides a persistent effect aiming direction of flow of the material in the contact cell. Unlike traditional processes in the real world rotary forging control metal flow lines can reproduce the relative velocity mismatch between the active tool and workpiece during plastic deformation at rotary forging. Since the component works frictional forces in balance work ten times smaller than conventional metal forming processes, it can be argued that the specified job raising component of friction force does not affect the overall energy consumption, and the results compulsory direction of the metal in the right direction significantly expanding the technological capabilities of the process in terms of the formation . Simulation of forming a flange at rotary forging with active friction forces carried out using the software package DEFORM 3D. Characteristics modeling: Material - Steel 20, speed of rotation - 280 r / min, the sample diameter - 28 mm , the initial sample height - 30 mm, terminal height - 20 mm. Simulation results forming the flange is comparison of the degree of deformation parameters : the shape and size of cell deformation , the final formation of the lateral surface flow velocity metal energy-power parameters and more. Findings. Comparison of energy-power parameters provides opportunities to assert their changes, in particular the shift in rotary forging lower end surface of the contact area is reduced and cell deformation force is reduced, and identify the critical values decrease cell contact. Forced flow of material in the radial direction and, depending on the direction of increases or decreases the area uncontact strains in the peripheral part of the flange and forming a lateral curvature of the surface. There are general prerequisites for the emergence and positive action in the contact center of shear strains. Originality/value. Controlled formation in a given direction is the new rotary forging tool that allows you to significantly expand the technological capabilities of the process.

Keywords: rotary forging, active friction force, computer simulation


References
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