FEATURES OF THERMOPULSE CLEANING OF SURFACES AND EDGES OF PARTS FROM CONTAMINATION AFTER MACHINING
Abstract
The requirements for the quality of aviation technology are decisive in the creation of technological systems that ensure the industrial purity of products. But the cost component of the finishing and stripping technologies is also important, the value of which depends on the chosen method of removing liquids, for example, from hydraulic units of aircraft. Reliable and cost-effective manufacture of parts with specific geometric and technological properties is the main goal of industrial production. In a market economy, the production of competitive products is a necessity, and it is always the choice of a rational, stable price-quality ratio. The quality of engineering products is a multifactorial problem, depending on the complex of systemic organizational and technological measures. In the production of aircraft technology, quality assurance is associated with dependability and a guaranteed resource that is vital due to specific operating conditions. One of the most important measures to ensure the reliability and guaranteed life of aviation products is to ensure industrial cleanliness. Cleaning from microparticles, macro- and micro-hauler surfaces and edges of parts after mechanical types of processing is included in the complex of these measures. The most problematic is the cleaning of body parts with a complex configuration of external and internal surfaces. The need to remove liquids and other technological pollution is explained by functional, ergonomic and aesthetic reasons. If ergonomic and aesthetic factors do not affect the technical characteristics of products, then the functional ones are directly related to the operability of machines and mechanisms. Functional causes are the prevention of failures of hydraulic distribution and control devices, as well as the prevention of increased wear of critical parts occurring when friction pairs of solid metal particles enter the gaps, difficulties in assembling and positioning, reducing fatigue strength and so on. Burrs cause turbulence in the flow of gas or liquid, disrupting the flow uniformity. It is obvious that the mutually influencing processes occurring in the hydraulic systems of machines, in violation of working conditions, lead to an increase in negative phenomena. The peculiarity of the use of purification technologies is the need to remove liquids from 100% of the parts included in the autonomous system of mechanisms. If at least one detail is left untreated, then the working fluid, when in contact with contaminated surfaces, washes away these contaminants and spreads them throughout the system, while the most sensitive elements are damaged. The reasons for the need to clean the surface and edges of parts from technological contamination are given. A brief review of the results of modeling and research on the removal of burrs in the environment of detonating gas mixtures has been performed. The features of the thermopulse process are considered and the results of numerical and experimental studies are presented. A comparative analysis of the energy intensity of removing burrs of various metals is shown.
Keywords
Full Text:
PDF (Русский)References
Losev, A.V. Improving the efficiency of stripping parts of pneumatic and hydro fuel systems using the thermo-impulse method: dis. ... cand. tech. sciences: 05.02.08 / Losev Aleksey Vasilevich. - Kharkov., 1995. - 210 p.
Bozhko, V.P. The main technologies of stripping of parts of aviatsіynogo virobnitstva high-temperature gas impulses: author. dis. ... dr. techn. sciences: 05.07.04. Bozhko Valeriy Pavlovich. - Kharkiv. – 1993. - 35 p.
Zhdanov, A.A. Technologies of thermopulse surface finish of precision parts in the aviation industry and numerical studies / А.А. Zhdanov, A.V. Losev // Open information and computer integrated technologies: - sat. scientific proceedings of the National Aerospace University named after M. Y. Zhukovsky «Kharkiv Aviation Institute». - 2003 - Vol. 19. - p. 174 - 183.
Slominskaya, E.N. The task of optimizing the modes of thermo-impulsive separation of the surfaces of parts and ways to solve it / E.N. Slominskaya, A.V. Losev // Aviation industry. - 2000. - №2. - C. 21-23.
Losev, A.V. Pulsed heating of a monolithic part and calculation of its temperature field during thermal removal of burrs / A.V. Losev, S.A. Meshcheryakov, E.N. Slominskaya // Aviation industry. - 1991. - №9. - pp. 32–34.
Pak, N.I. Numerical simulation of the process of thermal removal of za-tuffs by a concentrated energy flow / N. I. Pak, S.А. Shikunov // Processing materials with impulse loads. - Novosibirsk, 1990. - p. 168-175.
Dybsky, P.A. Parameters of the FEM model for thermo-impulse cleaning of metal parts / P.A. Dybsky, A.A. Zhdanov, Losev A.A. // Bulletin of the National Technical University "KPI". - 2002. - №19. -C. 146-152.
Adonin, S.М., 0 to heat transfer of products of detonation of a gas mixture in a chamber / S. M. Adonin, V. I. Manzhaley // Dynamics of a continuous medium. - Novosibirsk, 1986. - Vol.74. - C. 3–10.
Manzhaley, V. I. Experimental studies of the attenuation of shock waves and heat transfer to bodies after detonation of gas in chambers / V.I. Manzhaley // Mechanics of reacting media and its application. - Novosibirsk, 1989. - p. 123 - 132.
Development of a pilot industrial thermal waste removal system: Research Report (interim) / Dnipropetrovsk Metallurgical Institute; leader Popov EG, artist Gayek A.V. - Dnepropetrovsk, 1981. - 42 p. - GR No. 80019962. - Inv. № 02827004337.
Losev, A.V. Edge processing of parts using the thermo-impulse method”/ Ph.D. A.V. Losev, O.A. Losev // Open information and computer integrated technologies: sat. scientific papers of the National Aerospace University named after M. Y. Zhukovsky «Kharkiv Aviation Institute».– 2009. - Vol. 42 - Pp. 120–126.
Losev, A.V. Edge processing of parts using the thermal pulse method / A.V. Losev, O.A. Losev // Open information and computer integrated technologies: Sat. scientific papers of the National Aerospace University named after M. Y. Zhukovsky «Kharkiv Aviation Institute». - 2009. - Vol. 42 -Pp. 120–126.
DOI: https://doi.org/10.32620/oikit.2018.82.03
Refbacks
- There are currently no refbacks.