Abstract
The paper presents the main results related to the peculiarities of using 3D printing technology and methods of rapid prototyping in the manufacture of wax models of blades of a GTE turbine. The main design solutions that must be used in the design of a blade blank are presented in detail: the total shrinkage coefficient, equidistant rolling of the airfoil profile, allowance along tract surfaces, radial fillets, and a number of others. The results of control of geometric dimensions of the turbine blade blanks at the corresponding stages of the technological process showed deviations from the nominal value within the tolerance range for the executable dimensions, and the statistical information from the measurement of an experimental batch of wax models of blade blanks showed stability of the silicone tooling and ability to manufacture a series of wax models of the blades in the amount of 100 pieces when using one mold.
Highlights
Modern promising engine building is aimed at obtaining complex-profile parts with a developed spatial geometry with a lower cost price and improved quality characteristics
Turbine blade castings, which belong to this class of parts, are manufactured using investment casting technologies
It is advisable to obtain this technology in the manufacture of thin-walled high-precision castings from refractory materials that are difficult to machine [1]
Summary
Modern promising engine building is aimed at obtaining complex-profile parts with a developed spatial geometry with a lower cost price and improved quality characteristics. Investment casting technology is called precision casting, which enables production of complex shaped castings with minimal machining allowances, this method can significantly reduce material costs. This method is not devoid of disadvantages, the main of which are: high cost of castings, high percentage of defective products, outdated methods of control and production. In connection with these shortcomings, it is advisable to consider an improved process for manufacturing turbine blade castings using 3D printing technology and rapid prototyping methods [2]
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