Vol 79, No 6 (2012)

The systemic and analytical method as one of methods for the formation of technological policy in agro-industrial sector is stated. Description of its advantages over other methods is given. The eight-block classification of software and computing systems is suggested and some examples of their implementation with regard to grain harvesters are provided.

Developments concerning the technologies of converting diesel engines into gas-spark-ignited engines are briefly reviewed. These data may be useful for the selection of trends and structural features of conversion.

Main problems connected with disuse of waste and fallow land are analyzed. A new combined tool for the fallow land tillage is under development. Industrial tests of its specimen showed that the new tool, in comparison with single-purpose ones, can improve performance at least twofold, reduce total cost in 1.9 times and fuel consumption at least in 2.3 times.

Ways and means of tailings removal with a stripping-type combine are considered. General methodology for cutting device selection depending on the harvested crop and on the technology of cutting steams gleaning is presented.

Results of bench tests of tractor diesel engines in transient regimes are presented. The frequencies of load oscillations on motor shaft, attended by the increased fuel consumption and the high rate of friction pairs wear are determined. Reasons of occurrence of resonant phenomena, increased fuel consumption and high wear rate are established. Measures reducing the negative effects are recommended.

Preconditions and ways of creation of automatic high-altitude regulating systems with the use of ultrasonic distance sensors are considered. Results of experimental studies of a high-altitude regulating system during the non-contact copying of field surface relief are given.

Results of study of separation control system mounted on a potato combine are given.

Features of electrotechnology of microarc oxidation of light (Al, Mg, Ti) alloys are considered. A module with current displacement effect was developed and described. It allows to control the ratio of cathode and anode currents and the rigidity of mode in condensing AC inverters which are widely used for this technology.

Possibility to increase the efficiency of numerical program control lathes used for the multi-axis machining of parts recovered with the build-up of worn-out work surfaces is presented.

С 28 мая по 1 июня 2012 г. в Москве в павильонах №№1-5, 8, «Форум» и на открытых площадках ЦВК «Экспоцентр» пройдёт 13-я международная специализированная выставка «Оборудование, приборы и инструменты для металлообрабатывающей промышленности» - «Металлообработка-2012».