No abstract

ress of friction and wear processes during operation largely depends on the properties of a lubricating environment and the films of antifriction materials formed at the working surfaces. In this case, the copper-containing materials are widely used for the surfaces of mating parts, operated under conditions of contact against high-temperature, abrasive-based substances. However, while possessing high electrical con-6

Competition in the field of logistics and individual transport services requires the constant analysis of logistics chains and their individual links. Given analysis enables implementation of new approaches to logistics companies and networks trade marketing in the offtake of certain types of goods. Industrial and commercial enterprises have to expand their trade and economic relations with other regions with the aim to provide the necessary sales volumes in the domestic market of regions and to go beyond it. Integration of the country's economy and the free trade policy orientation greatly simplify the task of establishing the free trade and economic relations between producers and consumers. However, there is a question of how quickly and efficiently; with minimal logistics costs, the goods at the right region of the customer should be delivered. The experiment on a one-storey closed warehouse No 3 of Brovary "UVK Ukraine", where a process of the crossdocking warehousing, with subsorting from a warehouse, has been conducted. The warehouse mainly works on trading networks. The loading of the warehouse has been performed with the input flow intensity within (12.3 ... 23.56 (t/h)). During the experiment, the number gain of loading and unloading machines (Electrostacks Reath Track OMG NEOS LAT 3.0) a pcs in the process of unloading, loading and moving consignments, has been examined. In addition, the increasing number of workers employed in non-mechanized forms of work, such as receiving and stacking cargo in the reception area (moving the relevant consignments to designated areas of the reception area and its arrangement), which in total is an increase of 4 employees in the technological process of the warehouse operation, has been investigated during the experiment. The growing of labor and mechanized resources makes it possible to better organize the work of the warehouse, reduce total costs and increase cargo output flow. Conducting the process of warehouse work optimization on the formed technology and corresponding labor and mechanized resources caused an increase of its efficiency. It has been found that the optimal values of intensity of the incoming cargo flow will be 17.93 (t/h); the number of employees engaged in non-mechanized labor - 12 workers, and loading and unloading machines - 3 (pcs). Under such conditions, the warehouse functioning according to the desirability level will reach value 0.792. In this case, the cost value of warehouse work is 181.07 US$/h and cargo output flow intensity is 10.23 (t/h). Results of experimental studies have shown that implementation of the proposed method of increasing the efficiency of warehouse work, based on the company "UVK Ukraine" may, on average, achieve a total cost reduction of 17.2% and an increase in output flow by 34.6% and the input flow by 10.3%.

Existing control systems of sowing machines are intricate and not reliable enough. In these systems, devices are connected by a variety of signal and power wires. This leads to a "problem of interfaces" and a decrease in the efficiency of the control process. The solution to this problem is based on the mechatronic approach or combining elements and control units into mechatronic modules. They are characterized by reliability, compact design and lower cost. The improvement of functional and structural integration of the control system components by their integration into the mechatronic module is considered. The module of regulation of seeding rate on the basis of software and hardware platform Arduino is developed. The work of the proposed control system when changing the seeding rate in the seeding system is studied.

З розвитком дисперсних систем в трибологiї створилась можливiсть ефективно використовувати функцiональнi добавки до мастильних матерiалiв у виглядi геомодифiкаторiв. При впровадженнi композицiйних олив з геомодифiкаторами не потрiбно виконувати конструктивнi змiни спряжень деталей машин, але їх зносостiйкiсть i припрацьовуванiсть збiльшується. Це потребує проведення експериментальних трибологiчних дослiджень. Запропоновано використання геомодифiкатора KGМF-1+олеїнової кислоди в якостi функцiональної добавки до моторної оливи, а для порiвняння обрано свiжу оливу Monnol TS-5 UHPD 10W40 та композицiйну оливу Monnol TS-5 UHPD 10W40+XADO HighWay for Diesel Truck (2,0...2,3 %). Зменшення моменту сили тертя рiзних спряжень зразкiв в дослiджуваних оливах фiксували на машинi тертя моделi 2070 СМТ-1 з додатковим модулем "кiльце-кiльце". Визначення iнтенсивностi зношування зразкiв в дослiджуваних оливах проводили методом вимiрювання амплiтуди акустичного сигналу безпосередньо iз зони тертя за допомогою приладу фiрми Brüel&Kjear. Виявлено, що зростання ефективностi мастильних композицiй спостерiгається у наступному порядку: Monnol TS-5 UHPD 10W4, Monnol TS-5 UHPD 10W40, Monnol TS-5 UHPD 10W40+XADO HighWay for Diesel Truck, Monnol TS-5 UHPD 10W4+KGМF-1+олеїнова кислота. Показник зносу металевих зразкiв, в середовищi модифiкованої оливи Monnol TS-5 UHPD 10W4+KGМF-1+олеїнова кислота, у порiвняннi з базової оливою зменшився на 11,5...14,3 %. Значення критичного навантаження збiльшилось на 17,2 %, а навантаження зварювання збiльшилось на 19,3 %. вiдповiдно. В свою чергу, зафiксовано, що максимальна iнтенсивнiсть зношування зразкiв при використаннi модифiкованої оливи Monnol TS-5 UHPD 10W4+KGМF-1+олеїнова кислота зменшилась в 3,4...6,0 рази.. Отриманi данi необхiднi для формування композицiйних олив та обґрунтування умов їх подальшої експлуатацiї в перiод форсованого припрацювання трибоспряжень деталей Ключовi слова: трибоспряження зразкiв, геомодифiкатор, композицiйна олива, момент тертя, зносостiйкiсть, акустична емiсiя, зона тертя, присадка, бронза, сiрий чавун