The Kolomna-based machine-tool enterprise Stankotech of STAN Holding has created a hydraulic press for aircraft enterprises. The new equipment is designed for extrusion of large-sized aluminium alloy parts, which are necessary for the manufacture of modern civil aircraft, Rostec State Corporation reported.
The P5220 press belongs to the category of hydraulic pressing equipment. Its weight is about 650 tonnes, its height is 4.7 metres from the floor level and more than 8 metres together with the foundation, its electrical power is 800 kilowatts. One of the key characteristics of this machine is the specific deformation pressure, which reaches 40 megapascals, equivalent to about 400 atmospheres.
The P5220 machine can be used for the production of long aircraft parts, such as fuel tank elements, life support systems and aircraft panels. The equipment of Kolomna machine tool builders is planned to be used in the development of MS-21 and Tu-214 aircrafts. The press was developed under the order of the United Aircraft Corporation and is a completely domestic development, Rostec’s Directorate for Machine Tool Building and Special Projects noted.
The operating principle of the P5220 machine is similar to a volumetric sheet-punching machine. It is driven by two steel hydraulic cylinders, forming the required part by cold stamping from sheet material by crimping the workpiece with an elastic medium. This is polyurethane, which, due to its elasticity and flexibility, is used to create parts with complex shapes that cannot be produced using traditional materials and techniques.
The polyurethane is placed as a spacer between the workpiece and the pressing tool to ensure even pressure distribution during the moulding process. Elastic crimping using polyurethane provides a high quality part, reduces the likelihood of damage to the workpiece and provides more uniform pressure across the entire surface of the part being moulded. This approach is especially important when producing complex shaped parts with high demands on accuracy and surface characteristics.
The P5220 press is capable of producing pressed parts of 4200 x 1350 mm in size and up to 270 mm in height. The pressing process on the machine is fully automated thanks to software control, which ensures the accuracy of operations and simplifies the production process. The production time per part does not exceed two minutes.
