Free upsetting is a common metal treatment based on presses and hammers. Upsetting may be the pri� mary or secondary shaping operation. After upsetting, the forging has good mechanical properties. If the ini� tial blank is cast, the dendritic structure is improved by loading, especially with high strain, and the internal defects are eliminated. Upsetting is used to obtain forgings in the manu� factures of disks, gears, and similar components. The relatively small cross section of the blank is expanded on upsetting to the maximum size required, with decrease in height of the initial blank. A cylindrical blank is used, possibly with a central hole (as in a thickwalled tube). In the free upsetting of cylindrical samples, exter� nal frictional forces at the contact surface prevent radial flow of the metal and form a camber at the lat� eral surface; its magnitude depends on the initial dimensions and the upsetting parameters. In the deformation of hollow blanks at planepar� allel plates without lubricant, the metal flow is consid� erably more complex. The change in shape depends on the ratios D/H, S/H and the upsetting parameters. To obtain disk forgings, hollow blanks with S/H > 0.5 are expedient, since deformation is more stable in this case, without the formation of defects such as under� cutting and clamping of metal within the hole (1, 2). In the upsetting of such blanks, a single camber is formed at the lateral surface and within the cavity. In the production of disks, as a rule, free upsetting is not the primary shaping operation. When using blanks with an axial hole, the calculation of the initial geometric parameters must take account not only of the necessary volume of the part but of the metal dis� tribution in the forging, which depends on the flow pattern. To investigate metal flow in the upsetting of hollow cylindrical blank ( D/H = 1/3-1.5; S/H = 0.4-0.6), we conduct experiments on samples of lead and steel 60. Shaping occurs on account of metal flow to the axis and periphery of the blank. Calculation of the param� eters for the initial hollow cylindrical blank used to obtain disks and similar forgings entails quantitative estimation of the volume of metal displaced toward the periphery and the axis and the volume consumed in the formation of the camber at the lateral surface and within the hole. At present, thanks to the wide range of programs available, there is considerable scope for planning and conducting experiments on upsetting and for analysis of their results. Experimental data on the upsetting of hollow cylindrical samples are analyzed by means of a CAD system, so as to determine the displaced volumes. To this end, we must develop a method based on widespread vector and raster CAD programs.