Wyniki wyszukiwania - BazTech

1

Up-to-date processing equipment for turbine blade grinding

Poletaev V. A.

Scientific Problems of Machines Operation and Maintenance

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2012

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Vol. 47, nr 2

43--51

EN

The paper deals with the issues of the improvement of technological procedures aimed at machining of geometrically complex part surfaces, including the complex automation of technological procedures, and the intensification of machining processes due to wide application of high speed and creep feed grinding methods. The paper highlights today's solutions in the area of design and production of high-tech grinding equipment to grind geometrically complex surfaces of engineering parts, in particular, those of outer surface profile of turbine blades. The presented equipment layouts and the figures of working areas enable one to implement the automated technological procedures of machining using high-performance grinding methods as cutting processes. These engineering solutions allow one to machine the most quantity of geometrically complex part surfaces in one set in one coordinate system, to implement the technologies of high-speed creep feed grinding both with single-layer wheels with nickel-galvanic bond and the grain of hard-to-cut materials without wheel dressing and with the wheels with the CBN hard ceramic bond with the cyclic dressing, and to implement the creep feed grinding procedures with continuous abrasive wheel dressing in cutting in two coordinates applying linear and circular interpolation.

2

Technology of electrochemical rotary machining of gas turbine engine blade elements

Poletaev V. A., Sokolov N. N., Kozhina T.D., Eroshk V. Y., Manoshkin V. S.

Scientific Problems of Machines Operation and Maintenance

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2012

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Vol. 47, nr 2

53--63

EN

Modern automated production requires technologies to provide stability in machining procedures and the absolute repeatability of the quality parameters obtained on the parts produced. Without the development of a new level of ESM procedures, the generation and implementation of technological equipment, and its complex functioning, it is impossible to produce new generation GTE for modern civil and military aircraft, as well as ships and power plants. For this purpose, issues of the technology to be created for electrochemical rotary machining of GTE blading elements have been considered, including the following aspects: features of the technology of automated GTE compressor blades manufacture, kinematic schemes of work motions of tool electrodes, and constructions of tool electrodes for electrochemical rotary machining. New engineering solutions have been offered that considerably increase the efficiency of the rotary electrochemical machining of gas turbine engine blading elements.

3

State-of-the-art technologies of turbine blade machining by methods of creep feed grinding

Poletaev V. A.

Scientific Problems of Machines Operation and Maintenance

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2012

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Vol. 47, nr 2

37--42

EN

The paper highlights the modern method of high-performance machining of geometrically complex surfaces of gas turbine engine (GTE) blades, i.e. the method of creep feed grinding. This method is widely used to machine parts made of the difficult-to-get materials, e.g. the heat-resistant nickel alloys and the cobalt based alloys applied in the production of GTE parts. The grinding process under consideration is the main technological procedure to machine the geometrically complex surfaces of turbine blade roots. It is these surfaces that determine the precise position of blades on the wheels, and correspondingly in GTE rotors and stators. The cut-maps for blade root creep feed grinding are presented, including their detailed description and guidelines in terms of their application under production conditions subject to automated production and the employment of equipment manufactured by well-known companies.