Efficiency of Hybrid Cyclic Processing with the Use of Additive Technologies on CNC Machines for the Manufacture of Composite Aviation Parts due to the Reduction of Processing Errors

Abstract

In this paper we consider the effectiveness of additive technologies for the technological preparation of production of shaped complex products. The aspects of application of additive technologies in diversified production cycles of enterprises are stated. The positive aspects of the use of additive technologies in the design development of technological cycles of complex products are considered. The need to reduce the weight and size of modern aircraft makes the developers of these systems apply increasingly new and innovative solutions in the field of product design and in the field of their direct production. Additive technologies allow to reduce the weight of the product, while maintaining all the characteristics laid by the designer. The paper considers a cyclic hybrid technology in the production of parts and elements of aircraft. Each cycle consists of direct laser growing of the working surface of the part and subsequent machining. The aspects of production of details from the point of view of ensuring the condition of unity of design and technological base are considered, and also the analysis of the errors of production excluded in the course of the offered technology arising at traditional cycles of production of such detail is carried out.

Climatic features of the use of special elastomers with high heat resistance in agricultural machinery

“…Siloxane vulcanizates can work in a very wide temperature range -from -70 to 250 °C, and with short-term exposure, the characteristics do not change significantly even at 350 °C. In addition to heat resistance, organosilicon-based rubbers are resistant to weathering, radiation, biologically inert, and have high electrical insulating qualities [8,9]. The properties of siloxane-based vulcanizates from the IRP group used in aviation technology for sealing fixed assemblies are given in the table: One of the drawbacks of siloxane elastomers is their low resistance to fuel and oils [10].…”

Hydrogen production and green chemistry

“…Hybrid thermochemical splitting -the combination of thermochemical and photoelectrochemical [24,25] methods allowed to reduce the temperature of water decomposition, compared with the use of pure methods. Hybrid technology [26,27] leaves no waste, all chemicals involved in the production are sent for recovery, the process uses a renewable raw material -water. But energy efficiency, despite the decrease in operating temperature, is rather low, dangerous compounds are used, decomposition is carried out in several stages.…”

Combined processing of metal surfaces in agriculture with concentrated energy flows

“…The reliability of a new protective coating directly depends on the quality of cleaning the surface from the remnants of the previous staining [1]. This problem is especially typical for railway transport, a significant layer of primer and paint, and in some cases its thickness can be 1 mm, excludes the use of standard laser equipment due to low productivity at unreasonably high energy costs [2]. Therefore, sandblasting machines are mainly used to clean the surface of wagons.…”