Investigations on the machine parts treatment by non-bound blast particles

• Autorzy: Stotsko Z. A. , Stefanovych T. O.
• Języki publikacji: EN

Abstrakty

EN

Purpose: of this paper is development of the mathematical models of the methods of treatment by non-bound blast particles. Analysis of non-bound blast particles behavior is carrying out for modeling. The operating factors such as geometrical parameters of a nozzle, distance to the treated surface, and pressure of compressed air and outlet factors such as level of strengthening, depth of hardened layer are determined. It is proposed to put into basis of the mathematical models the energy conception that permits the unification and simplification of mathematical description of the processes. The level of strengthening, and depth of hardened layer are estimated for the plain surfaces by means of created mathematical models. Design/methodology/approach: The main methods used for the theoretical research are mathematical modelling, integral calculus, fundamentals of analytic geometry, probability theory, hydraulics of multiphase flow. The main methods used for the experimental investigations were conducted by receiving diagrams of surface roughness, microhardness of the oblique slices of the treated samples, speckle interferograms of the surfaces treated with the use of non bound blast particles. Findings: Method of mathematical modeling for treatment by non-bound blast particles is developed based on the energy conception. Mathematical model is created that allows calculating the characteristics of surface quality depending on the technological modes of the treatment. Research limitations/implications: It is planned to develop and improve the mathematical models in future research by extending them for the curvilinear treated surfaces, which has movement relative to the nozzle. Practical implications: has the applied software, elaborated on the basis of the models, that allows providing for automation of calculations of the characteristics of surface quality depending on the technological modes of the treatment. Originality/value: It is pioneered receiving functional dependences between the depth of hardening layer, changing of microhardness, degree of hardening and the parameters of equipment, blast, and working medium. Created functional dependences takes into account the distribution of characteristics of working medium (mass and velocity) all along the cross-sections of the blast.

Słowa kluczowe

EN

surface treatment; non-bound blast particles; strengthening; model; shot-peening; hopper; abrasive blasting; nozzle

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2011
• Tom: Vol. 49, nr 2
• Strony: 440--459
• Opis fizyczny: Bibliogr. 30 poz., rys., tab.

Twórcy

autor

Stotsko Z. A.

• Department of Electronic Machine Building, Lviv Polytechnic National University, Bandery str. 12, Lviv, 79013, Ukraine

autor

Stefanovych T. O.

• Department of Electronic Machine Building, Lviv Polytechnic National University, Bandery str. 12, Lviv, 79013, Ukraine

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