Vol. 3 (2021): Environment. Technology. Resources. Proceedings of the 13th International Scientific and Practical Conference. Volume 3

Engineering Sciences and Production Technologies

• INFLUENCE OF THE OVERLAP COEFFICIENT ON THE CONTRAST IN LASER MARKING OF C110W STEEL

  Nikolay Angelov, Lybomir Lazov, Edmunds Teirumnieks

  15-19

  • PDF

• INCREASING THE EFFECIENCY OF LASER MARKING OFALUMINUM ALLOYS BY DOUBLE WRITING OF THE SYMBOLS

  Atanas Atanasov, Angel Lengerov

  20-24

  • PDF

• COMSOL SIMULATION OF LASER WELDING OF ALUMINUM

  Ivaylo Balchev, Lyubomir Lazov, Nikolaj Angelov, Erika Teirumnieka

  25-29

  • PDF

• EXPERIMENTAL STUDY AND NUMERICAL MODELLING FOR FLEXURAL CAPACITY OF FRC STRUCTURAL ELEMENTS

  Liva Luize Bleive, Vitalijs Lusis

  30-35

  • PDF

• RIGID CONNECTION WITH GRANITE CHIPS IN THE TIMBER-CONCRETE COMPOSITE

  Karina Buka-Vaivade, Dmitrijs Serdjuks, Andrejs Podkoritovs, Leonids Pakrastins, Viktors Mironovs

  36-39

  • PDF

• TIMBER-CONCRETE COMPOSITE RIBBED SLABS WITH HIGH-PERFORMANCE FIBRE-CONCRETE

  Karina Buka-Vaivade, Dmitrijs Serdjuks, Janis Sliseris, Andrejs Podkoritovs, Raimonds Ozolins

  40-44

  • PDF

• EXPERIMENTAL DETERMINATION OF THE POWDER QUANTITY IN THE IGNITION CARTRIDGE FOR THE REUSABLE TRAINING-PRACTICE MORTAR ROUND FOR FIRING ON SHORT DISTANCES

  Conyu Conev, Tsanko Karadzhov

  45-48

  • PDF

• GEOMETRIC SYNTHESIS OF INVOLUTE PLANETARY GEARS WITH CONNECTED GEAR WHEELS OF TYPE 2K-H

  Genadi Cvetanov, Tsanko Karadzhov

  49-53

  • PDF

• CONSEQUENCES OF THE BASIC LAW OF FLAT INTERLOCKING OF INVOLUTE CYLINDRICAL GEARS

  Genadi Cvetanov, Tsanko Karadzhov

  54-57

  • PDF

• INFLUENCE OF VEHICLE SUSPENSION PARAMETERS ON ITS BRAKING PROPERTIES

  Anna Dmitrieva, Alexander Enaev, Vladimir Timofeev, Evgeny Seleznev, Tatyana Klets

  58-61

  • PDF

• HIGH RIGIDITY AND VIBRATION ENDURANCE BAR FOR DEEP HOLES

  Evgenia Evgenieva, Igor Nikiforov, Pavel Maltsev, Sergey Dmitriev

  62-65

  • PDF

• SYNTHESIS OF THE LOW-FREQUENCY VIBRATION EXCITER

  Dmitry Fedorov, Andrey Khitrov, Evgeny Veselkov, Yuliya Domracheva, Oksana Kozyreva

  66-71

  • PDF

• PLAIN AND PVA FIBRE-REINFORCED GEOPOLYMER COMPACT TENSION SPECIMEN CRITICAL AREA SURFACE COMPOSITION ASSESSMENT

  Rihards Gailitis, Andina Sprince, Leonids Pakrastins, Patrycja Bazan, Kinga Korniejenko

  72-77

  • PDF

• METHODS FOR OBTAINING SILVER NANOPARTICLES - A REVIEW.

  Risham Singh Ghalot, Lyubomir Lazov

  78-83

  • PDF

• FEATURES OF THE WORK OF INDUSTRIAL FENCES IN THE CONDITIONS OF THE FAR NORTH AND ANALYSIS OF TECHNOLOGIES FOR STRENGTHENING EXISTING

  Alexander Grigoriev, Alexander Rytvin, Boris Melkov, Nadezhda Dmitrieva, Elena Strelnikova

  84-88

  • PDF

• CLEANING OF CERAMIC ULTRAFILTRATION MEMBRANES AFTER FILTRATION OF HAY HYDROLYSATE

  Kamila Gruskevica, Martins Strods, Janis Rubulis, Linda Mezule

  89-94

  • PDF

• 3D MATHEMATICAL MODEL CHARACTERIZING THE DYNAMICS OF THE TEMPERATURE FIELD OF A WALL STRUCTURE WITH A DOUBLE-SIDED FACING FROM A SAPROPEL-HEMP COMPOSITE MATERIAL

  Sharif E. Guseynov, Janis Rimshans, Jekaterina V. Aleksejeva, Aleksandrs Bereznojs, Stanislavs Pleiksnis

  95-103

  • PDF

• EXPLORING THE IMPACT OF BURSTINESS ON THE SERVICE PROCESS AT THE CASH REGISTER

  Detlef Hartleb, Andreas Ahrens, Jelena Zascerinska

  104-109

  • PDF

• MICROPROCESSOR SYSTEM FOR TEMPERATURE INVESTIGATION OF AC MACHINES

  Totyo Iliev, Tsanko Karadzhov

  110-115

  • PDF

• WATER DISCHARGE MEASURING INSTRUMENTS: AN UP TO DATE OVERVIEW

  Artem Iukhno, Sergei Buzmakov, Alisa Zorina

  116-123

  • PDF

• DOPPLER NON-CONTACT RADAR SENSORS FOR WATER DISCHARGE ESTIMATION: ADVANTAGES AND LIMITATIONS

  Artem Iukhno, Sergei Buzmakov, Alisa Zorina

  124-129

  • PDF

• POSTPROCESSOR AND MACRO PROGRAM FOR CALCULATION OF THE DISPLACEMENTS OF THE WORKING COORDINATE SYSTEMS WHEN WORKING BY THE METHOD 3 + 2 AXES

  Tsvetan Kaldashev

  130-133

  • PDF

• VERICUT - CONFIGURING CNC SYSTEMS FOR TURNING CENTER WITH SUB-SPINDLE

  Tsvetan Kaldashev

  134-136

  • PDF

• MICROSTRUCTURE AND PROPERTIES OF HIGH CHROMIUM WHITE CAST IRONS ALLOYED WITH BORON

  Julieta Kaleicheva, Krasimir Kirov, Valentin Plamenov Mishev, Zdravka Karaguiozova

  137-141

  • PDF

• POWER UNIT FOR POWER SUPPLY OF AN AUTONOMOUS FACILITY HAVING ABILITY TO CONNECT TO GENERAL INDUSTRIAL POWER SUPPLY IN RECUPERATIVE MICROGENERATION MODE

  Alexander Khitrov, Andrei Khitrov, Sergey Loginov, Yuliya Domracheva, Evgeniy Veselkov

  142-147

  • PDF

• ALUMINUM BASED COMPOSITES OBTAINED BY FSP (REVIEW)

  Christo Kondoff, Radostina Zaekova, Marina Manilova

  148-153

  • PDF

• EXPERIMENTAL COMPARE OF THE MECHANICAL PROPERTIES OF PULTRUDED GLASS FIBRE REINFORCED PLASTIC BASED ON POLYESTER AND VINYLESTER RESIN

  Andrejs Kovalovs, Andrejs Morozovs

  154-158

  • PDF

• APPLICATION OF ARTIFICIAL NEURAL NETWORKS IN THE CONTEXT OF ACTIVE MAGNETIC BEARING CONTROL SYSTEMS

  Alexander Kravtsov, Konstantin Vukolov, Igor Plokhov, Igor Savraev, Sergei Loginov

  159-162

  • PDF

• INVESTIGATION OF THE INFLUENCE OF THE NUMBER OF REPETITIONS ON THE PROCESS OF LASER MARKING OF HS6-5-2-5 STEEL

  Lyubomir Lazov, Nikolay Angelov, Edmunds Teirumnieks

  163-167

  • PDF

• ON THE POSSIBILITY OF MARKING EGGS WITH A CO2 LASER

  Lyubomir Lazov, Pēteris Čeirs, Imants Adijans

  168-172

  • PDF

• METHODS FOR MEASURING LASER POWER

  Lyubomir Lazov, Tsanko Karadzhov

  173-180

  • PDF

• ON THE POSSIBILITY OF LASER STRIPPING OF COMMUNICATION CABLES WITH LOW-POWER CO2 LASER

  Lyubomir Lazov, Andris Sniķeris

  181-186

  • PDF

• LASER ABLATION OF PAINT COATINGS IN INDUSTRY

  Lyubomir Lazov, Nikolay Angelov, Edmunds Teirumnieks, Imants Adijāns, Antons Pacejs, Ērika Teirumnieka

  187-194

  • PDF

• TECHNOLOGICAL OPTIMIZATION OF POSITIONING PRISMATIC-BODY DETAILS IN HOLDING DEVICES

  Angel Lengerov

  195-197

  • PDF

• INVESTIGATION OF THE ACCURACY OF DETAILS POSITIONING IN DEVICES WITH ELASTIC GRIP PAWLS

  Angel Lengerov

  198-201

  • PDF

• SELECTION OF LOCATORS IN AUTOMATED DESIGN OF FIXTURES FOR LOCATING WORKPIECES DURING MACHINING

  Hristo Metev, Kalin Krumov, Ali Gitan

  202-207

  • PDF

• INFLUENCE OF FOREST STAND DENSITY ON PINUS SYLVESTRIS ROUNDWOOD QUALITY IN EVEN-AGED MIXED SCOTS PINE STANDS IN MYRTILLOSA MEL. MESOTROPHIC SITE TYPE

  Ziedonis Miklašēvičs

  208-215

  • PDF

• EVALUATION OF DAMAGE OF ROUNDWOOD ASSORTIMENTS CAUSED BY VARIED CONSTRUCTION, TECHNICAL SOLUTIONS AND CONDITIONS OF HARVESTER HEAD FEED ROLLERS

  Ziedonis Miklašēvičs

  216-225

  • PDF

• FEATURES OF ALLOYED A MATRYX OF WATER-DISPERSED IRON POWDERS

  Ivanka Miteva, Ivan Vinev, Ivan Mitev

  226-231

  • PDF

• INVESTIGATION OF RESIDUAL STRESSES AND DEFORMATIONS OF A PULTRUDED THIN BEAM PROFILE

  Endija Namsone

  232-235

  • PDF

• PRODUCTION OF MAGNESIUM BINDER COMPOSITES USING LOCAL RAW MATERIALS AND TECHNOGENIC PRODUCTS

  Elvija Namsone, Genadijs Sahmenko, Aleksandrs Korjakins

  236-241

  • PDF

• OPTICAL PROPERTIES OF LASER-COLOURING MARKED STAINLESS STEEL

  Pavels Narica, Svetlana Pan’kova, Vladimir Solovyev, Alexander Vanin, Mikhail Yanikov

  242-244

  • PDF

• INDUSTRY 4.0 - DEVELOPMENT AND CONSEQUENCES FOR SUSTAINABLE DEVELOPMENT OF BULGARIA

  Neli Nikolova

  245-251

  • PDF

• АNALYSIS OF OPTICAL METHODS FOR MONITORING THE WORKING SURFACE STATE OF THE GRINDING WHEEL

  Alexander Orlov, Igor Nikiforov, Pavel Maltsev, Anton Usik

  252-255

  • PDF

• INVESTIGATION OF THE INFLUENCE OF THE MODIFIERS P, SR, TI AND COMBINATIONS OF THEM ON THE STRUCTURE AND MECHANICAL PROPERTIES OF ALSI25 ALLOY

  Ivan Panov, Boyan Dochev, Desislava Dimova

  256-260

  • PDF

• INVESTIGATION OF THE INFLUENCE OF DIFFERENT MODIFIERS ON THE EUTECTIC SI IN THE COMPOSITION OF ALSI18 ALLOY

  Ivan Panov, Boyan Dochev, Valentin Manolov, Angel Velikov, Vanya Dyakova

  261-265

  • PDF

• GAS DYNAMICS OF WORKING FLUID INLET INTO CHAMBER OF ROTARY EXPANSION MACHINE

  Andrey Perminov, Alexander Ilyin, Sergey Tikhonov, Dmitriy Fedorov, Sergey Drozdov

  266-269

  • PDF

• SYNTHESIS OF A LEVER-CAM MOTION TRANSDUCER FOR A ROTARY VANE PUMP

  Andrey Perminov, Alexander Ilyin, Sergey Tikhonov, Alexander Khitrov, Yury Zhuravlev

  270-273

  • PDF

• AN ALTERNATIVE APPROACH TO REDUCING AGING OF INNOVATIVE INDUSTRIAL PRODUCTS IN TERMS OF INDUSTRY 4.0

  Desislava Petrova

  274-280

  • PDF

• RESONANT ELECTROMAGNETIC PROCESSES AT UNSTABLE OPERATION OF SLIDING CURRENT COLLECTOR UNITS OF TURBOGENERATOR

  Igor Plokhov, Igor Savraev, Alexander Ilyin, Oksana Kozyreva, Alexander Dementiev

  281-285

  • PDF

• OPTOELECTRONIC DEVICE FOR MEASURING THE POWER OF LASER RADIATION

  Dimcho Pulov, Tsanko Karadzhov

  286-290

  • PDF

• TEMPERATURE MEASUREMENT WITH PHOTODIODE IN DIFFERENT OPERATING MODES

  Dimcho Pulov, Tsanko Karadzhov

  291-295

  • PDF

• REDUCTION OF THE STRESS CONCENTRATION FACTOR OF PRISMATIC SPECIMENS THROUGH THE USE OF TOPOLOGICAL OPTIMIZATION

  Raycho Raychev, Ivanka Delova

  296-299

  • PDF

• METHODS FOR REDUCING THE STRESS CONCENTRATION IN CYLINDRICAL SPECIMENS, AT AXIAL LOADING

  Raycho Raychev, Ivanka Delova

  300-303

  • PDF

• STUDIES OF THE POSSIBILITIES TO USE OZONE FOR THE GRAIN STORAGE

  Adolfs Rucins, Evita Straumite, Dainis Viesturs, Alberts Kristins

  304-309

  • PDF

• 3D MODELING, SIMULATION AND ANALYSIS OF ANTI-VIBRATION BORING BAR

  Sabi Sabev, Plamen Kasabov

  310-313

  • PDF

• THE EFFECT OF FEED RATE AND CUTTING SPEED TO SURFACE ROUGHNESS DURING HOLE BORING OF ALUMINUM WITH ANTI-VIBRATION BORING BAR

  Sabi Sabev, Plamen Kasabov

  314-318

  • PDF

• RESEARCH OF HUMAN HAND MOVEMENTS REPEATABILITY USING ROBOTIC SYSTEM

  Paulius Sakalys, Loreta Savulioniene, Dainius Savulionis

  319-323

  • PDF

• SELECTION OF A TRANSPORTATION OPTION FOR THE PROCUREMENT OF GOODS FOR OWN NEEDS, IN ORDER TO INCREASE THE EFFICIENCY OF OPERATIONAL PLANNING

  Silviya Salapateva, Maria Chulkova

  324-329

  • PDF

• MODELING THE OPERATION OF A GALVANIC BATH WITH ELECTRIC HEATERS AND OPTIMIZING ITS DESIGN BASED ON NUMERICAL SIMULATION

  Alexander Samarkin, Sergey Dmitriev, Alexander Dementyev, Evgeniya Evgenyeva, Elena Samarkina

  330-335

  • PDF

• SIDE SLIP OF WHEELS WITH LOW AND ULTRA-LOW PROFILE TIRES OF A PERSONAL CAR NEGOTIATING A TURN

  Stiliyana Taneva, Krasimir Ambarev

  336-342

  • PDF

• INCREASE OF INDICATORS OF VEHICLES’ SMOOTH RUNNING BY INTERNAL SUSPENSION OF WHEELS

  Vladimir Timofeev, Alexander Enaev, Anna Dmitrieva, Evgeniy Seleznev, Tatyana Klets

  343-347

  • PDF

• HEAT SOURCE FOR TIG WELDING MODELLING

  Manahil Tongov

  348-356

  • PDF

• INVESTIGATION OF GMAW BY SIMULATION MODELLING

  Manahil Tongov

  357-362

  • PDF

• IMPACT OF THE HIGH-SPEED FLOW OF POWDER PARTICLES ON THE STRUCTURE OF POLYMER MATERIALS AND METAL-POLYMER COMPOSITES

  Yulia Usherenko, Viktors Mironovs, Leonids Pakrastiņš

  363-367

  • PDF

• GAS DISTRIBUTION SYSTEM FOR OPTIMIZATION OF THE TECHNOLOGICAL PROCESS OF COATING IN AN UNBALANCED MAGNETRON SPUTTERING INSTALLATION

  Ivan Uzunov, Angel Lengerov

  368-371

  • PDF

• RESEARCH OF POWER GENERATOR PROTOTYPE DEVELOPMENT AND INTEGRATION INTO AUTONOMOUS ROBOTIC SYSTEMS

  Matutis Vaidotas, Loreta Savulioniene, Paulius Sakalys, Simonas Cesnauskas

  372-377

  • PDF

• DEVELOPMENT OF THE OPTIMAL DESIGN OF MANUAL GARDEN FORK WITH THE ABILITY TO QUICKLY CLEAN THE WORKING SURFACE

  Ivan Voiku

  378-381

  • PDF

• ON THE TURBULENCE IN A VISCOUS HEAT-CONDUCTING GAS

  Sergey Voronkov, Pavel Safronov, Alexander Dementiev, Olga Frolova, Tatiana Bugaeva

  382-386

  • PDF