Vektor nauki Tol'yattinskogo gosudarstvennogo universiteta最新文献_第4页

CONCERNING THE MELTING OF AN ALUMINIUM ELECTRODE BY THE ARGON ARC OF STRAIGT POLARITY 关于用直极性氩弧熔化铝电极

Vektor nauki Tol'yattinskogo gosudarstvennogo universiteta Pub Date : 2019-01-01 DOI: 10.18323/2073-5073-2019-4-52-57

V. Sidorov, D. E. Sovetkin, N. Borisov

{"title":"CONCERNING THE MELTING OF AN ALUMINIUM ELECTRODE BY THE ARGON ARC OF STRAIGT POLARITY","authors":"V. Sidorov, D. E. Sovetkin, N. Borisov","doi":"10.18323/2073-5073-2019-4-52-57","DOIUrl":"https://doi.org/10.18323/2073-5073-2019-4-52-57","url":null,"abstract":": This paper gives the information analysis on the ratio of the melting rate of electrode wire on welding arcs of direct and reverse polarity in СО 2 . At equal currents, the melting rate on direct polarity arc is about two times higher than the melting rate on reverse polarity arc. When welding in shielding gases, the reason to refuse the use of direct polarity arc is the low melting rate stability of the electrode wire. It is caused by the intense moving of arc cathode spot affected by the emissivity change of the electrode surface. Within the scope of this paper, the authors propose a calculation method for arc power transmitted to a consumable aluminum electr ode on various polarities. The calculated specific power (per 1 А of the current) is significantly higher for electrode-cathode, and when step-up the current, the power increases more inten-sively than for anode. The experiment determined the melting rate of aluminum electrode wire of 1.2 mm diameter for direct polarity arc in argon. It is as well about two times higher than for reverse polarity. Within the limits of 80– 180 А currents on the arc direct polarity, there was not defined any significant dependence between the melting ratio of aluminum wire and arc current. The calculation method ensures good convergence of designed and experimental data on the ratio of electrode melting rates on different polarities. The formulas obtained allowed evaluating the effective arc power in argon for aluminum products. Further researches are to be aimed at defining the stability conditions of the melting rate of electrode wire on direct polarity arc in shielding gases. It is especially necessary for welding of heavy thickness parts to reach more efficient filling of edge preparation.","PeriodicalId":23555,"journal":{"name":"Vektor nauki Tol'yattinskogo gosudarstvennogo universiteta","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80253394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

CARBON DIOXIDE CORROSION OF OILFIELD CASING AND TUBULAR GOODS IN MEDIA SATURATED WITH H2S AND Cl 油田套管和管件在饱和H2S和Cl介质中的二氧化碳腐蚀

Vektor nauki Tol'yattinskogo gosudarstvennogo universiteta Pub Date : 2019-01-01 DOI: 10.18323/2073-5073-2019-2-6-17

M. A. Vyboyshchik, A. Zyryanov, I. Gruzkov, A. Fedotova, Llc “IT-Service”

引用次数: 2

PRODUCTION OF NANOCOMPOSITE WO3/rGO ELECTROCHROMIC FILMS BY THE METHOD OF SPRAY-PYROLYSIS ON GLASS ITO SUBSTRATES 用喷雾热解法在ITO玻璃基板上制备WO3/rGO纳米复合电致变色薄膜

Vektor nauki Tol'yattinskogo gosudarstvennogo universiteta Pub Date : 2019-01-01 DOI: 10.18323/2073-5073-2019-3-69-76

A. Shchegolkov

引用次数: 4

THE INTERRELATION OF THE SIZES AND PHASE COMPOSITION OF Zr-BASED BULK AMORPHOUS ALLOYS zr基块状非晶合金尺寸与相组成的相互关系

Vektor nauki Tol'yattinskogo gosudarstvennogo universiteta Pub Date : 2019-01-01 DOI: 10.18323/2073-5073-2019-4-29-34

A. Drozdenko, D. Matveev, E. Pershina, A. Aronin

引用次数: 0

IDENTIFICATION OF FATIGUE CRACK ZONES IN VERY HIGH CYCLE FATIGUED 42CrMo4 STEEL WITH THE USE OF QUANTITATIVE FRACTOGRAPHY 高周疲劳42CrMo4钢疲劳裂纹区域的定量断口识别

Vektor nauki Tol'yattinskogo gosudarstvennogo universiteta Pub Date : 2019-01-01 DOI: 10.18323/2073-5073-2019-3-33-39

M. Seleznev, E. Merson

引用次数: 0

ON THE EFFICIENCY OF FUZZY LOGIC APPLICATIONS IN HYDRAULIC ACTUATOR CONTROL SYSTEMS 模糊逻辑在液压作动器控制系统中的应用效率研究

Vektor nauki Tol'yattinskogo gosudarstvennogo universiteta Pub Date : 2019-01-01 DOI: 10.18323/2073-5073-2019-2-49-56

A. Mesropyan, R. R. Sharipov

引用次数: 0

KEY ASPECTS OF INFLUENCE OF ULTRASONIC VIBRATIONS OF A DRESSING TOOL ON THE EFFICIENCY OF THE PROCESS OF WHEEL DRESSING 修整工具的超声振动对车轮修整效率影响的关键方面

Vektor nauki Tol'yattinskogo gosudarstvennogo universiteta Pub Date : 2019-01-01 DOI: 10.18323/2073-5073-2019-1-43-49

S. V. Murashkin, A. Selivanov, V. Malyshev

引用次数: 0

THE STUDY OF SPECIAL ASPECTS OF COMBUSTION IN A VARIABLE VOLUME COMBUSTION CHAMBER 变体积燃烧室中燃烧的特殊方面的研究

Vektor nauki Tol'yattinskogo gosudarstvennogo universiteta Pub Date : 2019-01-01 DOI: 10.18323/2073-5073-2019-1-64-71

A. Shaikin, P. V. Ivashin, I. Galiev, I. Bobrovsky, A. D. Deryachev, A. Tverdokhlebov

引用次数: 0

THE KINETICS AND MECHANISM OF THE FATIGUE FRACTURE OF SAMPLES OF 40H AND 38H2N2MA STEELS 40h和38h2n2ma钢试样疲劳断裂动力学及机理研究

Vektor nauki Tol'yattinskogo gosudarstvennogo universiteta Pub Date : 2019-01-01 DOI: 10.18323/2073-5073-2019-1-30-36

G. Klevtsov, D. Merson, N. Klevtsova, E. Merson, M. Linderov, S. Zasypkin, A. Bondarenko

引用次数: 3

THE STUDY OF INFLUENCE OF ULTRASONIC DRESSING ON THE ENERGY-FORCE INDICATORS OF CYLINDRICAL PLUNGE GRINDING 超声修整对外圆切入磨削能量-力指标的影响研究

Vektor nauki Tol'yattinskogo gosudarstvennogo universiteta Pub Date : 2019-01-01 DOI: 10.18323/2073-5073-2019-2-57-62

S. V. Murashkin, A. Selivanov, V. Malyshev

{"title":"THE STUDY OF INFLUENCE OF ULTRASONIC DRESSING ON THE ENERGY-FORCE INDICATORS OF CYLINDRICAL PLUNGE GRINDING","authors":"S. V. Murashkin, A. Selivanov, V. Malyshev","doi":"10.18323/2073-5073-2019-2-57-62","DOIUrl":"https://doi.org/10.18323/2073-5073-2019-2-57-62","url":null,"abstract":": The authors carried out the experimental study of the influence of ultrasonic dressing of grinding wheels on the energy-force indicators of the grinding process. The study showed the degree of ultrasonic dressing influence on the cylindrical plunge grinding indicators in the automatic cycle of processing. The authors identified that ultrasonic dressing of grinding wheels with a dressing tool executing vibrations with the frequency of 22 kHz and the amplitude of 10…15 µm allows decreasing the supporting face of a grinding wheel texture 4 – 5 times through the increase of the abrasive grains quantity with the relatively sharp micro-edges and microcracks. It is shown, that the distinctive features of formation of the grinding wheel working surface texture during ultrasonic dressing ensure the reduction of cutting perpendicular force about by 30 % during the whole period of grinding wheel life as well as allows increasing the wheel life 1.5…2 times. It is noted that during the ultrasonic dressing, the abrasive grains break due to the repetitive impact loading creating numerous cutting edges and microcracks at the less dressing depth than after traditional dressing. In the result of interference of si-nusoidal trajectories of diamond points of a dressing tool, on a grinding wheel, a certain cammed texture forms, what de-creases the wheel bearing surface. The existence of two texture components explains the higher cutting power of a grinding tool compared to the traditional dressing.","PeriodicalId":23555,"journal":{"name":"Vektor nauki Tol'yattinskogo gosudarstvennogo universiteta","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89528509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0