Техніка в сільськогосподарському виробництві, галузеве машинобудування, автоматизація. Випуск 27. - 2014
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Item type:Item, Розмірна обробка твердосплавних волок(КНТУ, 2014) Сіса, О. Ф.; Осипенко, М. В.; Стебліна, К. В.; Sisa, Oleg; Osipeko, Marina; Steblina, KaterinaВиконано обґрунтування технологічних схем формоутворення поверхонь твердосплавної волоки способом розмірної обробки електричною дугою з урахуванням особливостей фізичних механізмів їх утворення та гідродинамічних явищ в між електродному проміжку. Встановлені аналітичні зв’язки технологічних характеристик процесу чорнової розмірної обробки електричною дугою сплаву ВК8, з режимами обробки і геометричними параметрами. Article is dedicated to the development of technology and equipment of mode of roughing of carbide drawplate by electric arc as an alternative to traditional methods of high performance choice of roughing. During operation, in the hole of drawplate along with uniform abrasion, occurs severe wear, as a consequence of welding of the processed material to the material of drawplate. As a result of the periodic separation of these places the structure obtained by sintering is broken by chipping of the carbide grains. Torn carbide particles leave marks on the wire, with such wear the drawplate does not meet the specified size and it is to bore with larger diameter by the grinding with the diamond tool at the roughing. It is proposed to bore carbide drawplate by dimensional electric arc as at roughing chisel carbide dies dimensional arc of electricity that can take large allowances of material at the lowest time expenditure for processing. At that the machining cycle was down by 4,4-5,2 times. It was made the justifications of the technological scheme of forming of holes of carbide drawplate in the way of sizing by arc taking into account the features of physical formation mechanism and hydrodynamic phenomena in the electrode gap. Analytical roots of technological characteristics of the process of rough sizing with the arc VK8 alloy with treatment regimens and geometrical parameters established.Item type:Item, Обробка дугою отворів з використанням мідного електрода-інструмента(КНТУ, 2014) Боков, В. М.; Bokov, ViktorРозроблено основи прогнозування технологічних характеристик процесу обробки електричною дугою отворів мідними електродами-інструментами. Запропоновано та випробувано новий ефективний спосіб обробки малих отворів. The objective of the work is to forecast technological parameters and increase of efficiency of the process of dimensional treatment of holes by the arc using copper electrochemical machining electrodes. The work presents the results of experimental research of the following technological parameters: relative linear wear of a copper electrochemical machining electrode, roughness of the treated surface, flank spark gap, treatment productivity, specific output of treatment and unit discharge of energy. Conclusions: - theoretical and practical principles of forecasting technological parameters and increase of efficiency of the process of treatment of holes by the arc using copper electrochemical machining electrodes were worked out; - the simulator of relative linear wear of copper electrochemical machining electrode was received which enabled showing the conditions to minimize wear; - new effective way of treatment of small holes by the arc was suggested and tested.