S.V. Bochkarev - Dr.Sc. (Eng.), Professor, Department of Microprocessor-based automation, Perm National Research Polytechnic University. E-mail: bochkarev@msa.pstu.ru A.L. Galinovskiy - Dr.Sc. (Eng.), Dr.Sc. (Ped.), Professor, Head of Department of Space Rocket Technology, Bauman Moscow State Technical University. Е-mail: galcomputer@mail.ru A.A. Abashina - Assistant, Department of Space Rocket Technology, Bauman Moscow State Technical University. E-mail: 3876959@mail.ru

Hydrojet and water-jet machining is a complex process, the result of which is determined by the combination of technological parameters. Justification options causes considerable difficulties because of the complexity of the relationship between process parameters and parameters generated by surfaces. Currently, developing analytical methods for assigning options, but the process model is complex and imperfect. In this context, experimental methods express interest assessment. The present study examines the possibility of applying the method of acoustic emission as an integrated information and diagnostic technology to ensure mechanical and physical-technical processing of materials. A study based on empirical data acquisition and processing. Experiments on hydraulic cutting materials were carried out at the installation Flow System (United States) in the center of the hydrophysical studies Lomonosov Moscow State University. Using technical equipment, ranged distance from focusing nozzle to the sample surface and angles α interaction from -60 up to 60°. As a result, the impact of Ultra Jet liquid on the surface of the sample surface hydraulic formed Caverns of varying depth and width. Hydraulic formed Caverns depth (H) was measured using a metallographic microscope MIM-1600B on ten points with subsequent calculation of their average value. Based on the results of the experiment surface hydraulic formed Caverns depths calculated performance (mm3/s). In this work of water-jet performance power and dependence of acoustic radiation in the treatment area for different angles of Ultra Jet interaction and the sample surface and different distances (L) between the focusing nozzle and processed material. It is shown that the total power of AE reflects the character of changes of water-jet performance for both negative and positive angles interact Ultra Jet with the surface of the material. From a practical point of view, by the maximum value of power you can speak about a rational AE mode processing based on the criterion of maximum performance. Based on the obtained experimental data revealed a significant decrease of water-jet performance and quality of the processed surface, as for traditional process (α = 0°) and for negative angles of Ultra Jet interaction and the surface of the specimen (α = - 30°, - 45°; - 60°). Studies have shown that when you change the distances L there are three distinctive plot: the first illustrates the dramatic increase in Jet performance enough; the second demonstrates the optimum in performance for the distance L ≈ 4 mm; the third is characterized by a fairly smooth performance and the quality of the processed surface. Studies have shown that changing the angle of the Ultra Jet interaction and the sample surface is generally consistent with the nature of changes of acoustic radiation power in a zone of water-jet; negative angles of Ultra Jet interaction and the sample surface reduces processing performance and quality of the processed surface; distance from focusing nozzle to the surface is the best value on Jet performance criteria and the nature of the performance curve corresponds to the evolution of acoustic radiation power in processing zone.

 

1. Barsukov G.V., Aljushin E.G. SHorkin V.S. Sovershenstvovanie tekhnologii gidroabrazivnogo rezanija na osnove napravlennykh vibracijj materiala // Naukoemkie tekhnologii v mashinostroenii. 2012. № 5. S. 3-6.
2. Stepanov JU.S., Barsukov G.V., Aljushin E.G. Sovremennye tekhnologii gidro- i gidroabrazivnojj obrabotki zagotovok // Naukoemkie tekhnologii v mashinostroenii. 2012. № 6. S. 15-20.
3. Brenner V.A., ZHabin A.B., Pushkarev A.E., SHHegolevskijj M.M. Gidroabrazivnoe rezanie gornykh porod. M.: Izd-vo Moskovskogo gosudarstvennogo gornogo universiteta. 2003. 279 s.
4. Tarasov V.A., Galinovskijj A.L., Elfimov V.M. EHrozionnoe iznashivanie obrabatyvaemojj poverkhnosti pri ciklicheskom nagruzhenii potokom abrazivnykh chastic // Vestnik MGTU im. N.EH. Baumana. Spec. vypusk. M.: Izd-vo MGTU im. N.EH. Baumana. 2008. S. 163-174.
5. Erukhimovich JU.EH. Matematicheskoe modelirovanie i sovershenstvovanie metoda rascheta ehffektivnosti processa rezanija gornykh porod gidroabrazivnym instrumentom: Avtoref. diss. ... kand. tekhn. nauk. Tula. 1999.
6. Kibalchenko A.V. Primenenie metoda akusticheskojj ehmissii v uslovijakh gibkikh proizvodstvennykh sistem. M.: VNIITEHMR. 1986. 56 s.
7. Barzov A.A., Belov V.M., Demchik A.I. Povyshenie kachestva poverkhnosti pri rezanii trudnoobrabatyvaemykh materialov // Tekhnologija, ehkonomika, organizacija proizvodstva i upravlenija mashinostroenija: Obzornaja informacija CNIITEHtjazhmash. 1988. Vyp. 9. 36 s.
8. Poduraev V.N., Barzov A.A., Gorelov V.A. Tekhnologicheskaja diagnostika rezanija metodom akusticheskojj ehmissii. M.: Mashinostroenie. 1988. 54 s.
9. Galinovskijj A.L., Provatorov A.S., KHafizov M.V. EHkspress-vybor racionalnykh rezhimov gidroabrazivnojj obrabotki materialov s ispolzovaniem akusticheskojj ehmissii // Izv. vuzov. Ser. Mashinostroenie. 2013. № 3. S. 56-61.
10. Axinte D.A., Kong M.C. An integrated monitoring method to supervise waterjet machining // CIRP Ann Manuf Technol. 2009. V. 58. P. 303-306.
11. Hloch S., Valíček J., Hreha P., Bednár S. On-line identification of hydroabrasive cutting by means of acoustic emission and vibration // Steevepress Ltd., Prešov. 2010. P. 126.
12. Abashin M.I. Uskorennoe opredelenie parametrov kachestva poverkhnostnogo sloja materiala izshhdelijj po rezultatam vozdejjstvija na nego sverkhzvukovojj strui zhidkosti: Avtoref. dis. ... kand. tekhn. nauk. M. 2013. 17 s.
13. Avakjan V.A., Agasarjan R.R., Dokhinjan R.T. Tekhnologii i konstrukcii stankov dlja strujjno-abrazivnojj obrabotki: Metod. rekomendacii // NPSO «Armstanok». M.: VNIITEHMR. 1990. 40 s.
14. Barzov A.A., Galinovskijj A.L., Puzakov V.S. Ultrastrujjnye tekhnologii zhidkostejj i suspenzijj. M.: MGTU im. N.EH. Baumana. 2009. 250 s.
15. Galinovskijj A.L., Salnikov S.K. Analiz vlijanija i optimizacii kinematicheskogo faktora na povyshenie ehffektivnosti ultrastrujjnojj obrabotki // Problemy kachestva mashin i ikh konkurentosposobnosti: Materialy VI Mezhdunar. nauch.-tekhn. konf. / Pod obshh. red. A.G. Suslova. Brjansk: BGTU. 2008. S. 285-286.
16. Abdel-Rahman A., El-Domiaty A. Maximum depth of cut for ceramics using abrasive waterjet technique // Wear. 1998. V. 218. P. 216-222.
17. Chen F.L., Wang J., Lemma E., Siores E. The mechanisms of surface striation formation in abrasive waterjet machining // J Mater Process Technol. 2003. V. 141. P. 213-218.
18. Hloch S., Valíček J., Kozak D., Tozan H., Chattopadhyaya S., Adamčík P. Analysis of acoustic emission emerging during hydroabrasive cutting and options for indirect quality control // Int J Adv Manuf Technol, 2013. V. 66. P. 45-58.
19. Akkurt A., Kulecki M.K., Seker U., Ercan F. Effect of feed rate on surface roughness in abrasive waterjet cutting applications // J Mater Process Technol. 2004. V. 147. P. 389-396.