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Еуразия технологиялық университетінің Хабаршысы. 2021. №2 
5 
CISTI 55.16.24, 53.43.39 
A.Zh.Bazhibayeva
1
, D.B.Yussupov
1
 
 
1
Satbayev University, Almaty, Kazakhstan,
 
MODERN PRESSING EQUIPMENT FOR PRESSING HARD-DEFORMABLE 
ALUMINIUM ALLOYS WITH ACTIVE FRICTION FORCES 
 
Annotation 
The work introduces a fundamentally new design of a horizontal hydraulic press for 
carrying out compression with the active action of friction forces, shows the features of 
its device, and explains the principle of its operation. The installation of the original 
throttling controller on the press significantly increased its potential. Additional features 
of the press are provided by the original design of the press tool. Press showed reliable, 
easy-to-manage work and provided a significant increase in productivity and high quality 
of products. The use of complex mathematical modeling made it possible to significantly 
expand the possibilities of controlling the pressing process, create and optimize the design 
of a new tool, predict the obtaining of the required structure and mechanical properties of 
press products. 
Keywords: extrusion, hydraulic press, high-speed pressing, friction forces, 
aluminium alloys. 
Numerous studies have shown a clear advantage of pressure with active friction 
forces (PAFF) over traditional direct and reverse extrusions. Thus, at PAFF, the 
compression rates are 3-4 times higher than those for direct and 25-40 per cent higher 
than those for reverse pressing, uniform mechanical properties are ensured in terms of the 
length and cross-section of the articles, there is no large crystalline rim, the output of the 
suitable one is increased to 90 per cent, etc. [1] 
Its widespread adoption in industry was constrained by the lack of reliable and 
convenient equipment for the PAFF process. Based on the results of complex tests at 
laboratory facilities as well as semi-industrial testing, a special press for PAFF and 
reverse pressurization with a force of 31.5 MN was produced, which was put into 
operation at the Stubinsk metallurgical plant in 1980. Unfortunately, built press by 
traditional technology with individual drives on the container and press-stamp had a 
complicated control system, which does not allow to fully implement the PAFF 
process. This resulted in only 60-80% use of press drives. [2] In the middle of the process 
the power parameters changed very dynamically and the equipment could not keep track 
of these changes, so the process was sort of a wave. This made it much more difficult to 
maintain the necessary cinematic pressure regime. 
A significant step forward in pressing was the development of a new constructive 
press circuit with a dependent «rigid» hydraulic connection between the movable press 
elements, Figure 1. This connection is achieved by the installation on a pressing 
crosspiece of cylinder 8 of sub-cylinder 21 and on the rear transverse of the cylinders 

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