Э. К. Идрисова бас редактордың орынбасары, ету оқу және ғылыми қызмет
Еуразия технологиялық университетінің Хабаршысы. 2021. №2
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Вестник-№2-2021
| Еуразия технологиялық университетінің Хабаршысы. 2021. №2
8 The advantages provided by the PAFF process are achieved by the accelerated flow of the peripheral layers of the metal of the blank. This flow of metal is created by the accelerated movement of the container in relation to the press stamp. As a result of the resulting active action of friction forces, an accelerated peripheral flow of metal (APM) between the container and the blank appears, but the amount of friction depends on numerous factors (especially on the ratio of heating temperatures of the blank to the container) and can vary widely. Numerous model studies carried out by QForm confirmed that under certain technology modes even a slip-through occurs between the container and the blank. This leads to a decrease in the volume of the peripheral metal flow and additional wear of the container. In order to increase the power of APM and to reduce its dependence on the parameters of the compression process, a new design of the working container was developed - a container with «cest», given in Figure 2. [4] «Cest» is executed on the container or at the expense of other devices, an element with a ledge must move with the container during the compression process. Said device generates an intensive additional peripheral flow of metal which overtakes the central flow created by the solid part of the pressing. Such a compression scheme depends to a much lesser extent on the conditions of interaction of the container with the blank and, therefore, on the extent of realization of the active action of friction forces. Picture 2 - Active friction compressor: 1 - the stamp, 2 - the cylindrical part of the press-stamp, 3 - the hollow cylindrical bushing of the press-stamp, 4 - the plunger of the cylinder of the support, 5 - the cylinder cap of the support, 6 - the movable cross-beam, 7 - the container, 8 - the cylinder of the support, 9 - the working belt, 10 - the splinton, 11 - the matrix, 12 – preparation Analysis of the results of the simulation showed that the proposed «ledge» compression scheme makes it possible to increase the volume of the peripheral flow of the metal due to the involvement of layers located at a considerable distance from the surface of the container. In this way it is possible to manage the extrusion process more flexibly. The results of these studies and the experience gained from the successful operation of the P8546 gauge press formed the basis of the technical assignment for the development of the pipe press. A successful system with «rigid» hydraulic connection of |