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Determination of Coal Cutting Forces Using the Cutting Head of POU-BW/01-WAP Device

Biały Witold, Fries Jiri, Galecki Greg

Multidisciplinary Aspects of Production Engineering

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2021

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Vol. 4, Iss. 1

281--289

EN

The paper presents a method for measuring and recording the forces involved in the coal cutting process. Moreover, a method for visualization of all forces involved in the cutting process was described. In the following part, the construction and principle of operation of a device for determination of forces involved in the cutting process (coal mining), referred to by the author as POU-BW/01-WAP, are presented. Resistance extensometry was used to measure the forces. This is the only device in the world that determines two of three force components that take part in the cutting process. For this purpose, two independent measuring blocks were used, which are strain gauges of force: cutting (Fs) and knife pressure (Fd). In order to register these forces, a real mining knife used in longwall shearer drums was applied – i.e. tangential-rotary. The equipment has the ATEX certificate allowing for operation in real conditions as a device intended for use in potentially explosive atmospheres – in accordance with the directive 94/9/EC. It has received many awards at world fairs for inventions and innovative solutions.

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The concept of a screw conveyor for the vertical transport of bulk materials

Bidas Michał, Galecki Greg

Mining Machines

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2021

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no. 3

28--33

EN

Screw feeders and conveyors are mainly used in the following industries: minerals, agriculture, chemistry, pharmaceutical, pigments, plastics, cement, sand and food processing for transporting and mixing the granular materials. The article presents a synthetic analysis of the conveyors used in the collection and transport systems of loose materials. It focusess on the solutions based on a srew shaft operating vertically or at an angle. A concept of a screw conveyor intended for vertical transport of loose materials is presented. Due to structure and transport properties, the conveyor can replace the oversized bucket conveyor, currently used in one of the industrial plants. A 3D model was developed, illustrating the manufacturing method and introducing the principle of the conveyor operation.

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Analysis of reasons for non-compliance using the quality management method. Case study

Midor Katarzyna, Biały Witold, Galecki Greg, Grebski Wes

Quality Production Improvement - QPI

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2020

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Vol. 2, Iss. 1

19--28

EN

Companies should constantly seek the causes and sources of irregularities. For this purpose, known and widely used quality management methods and tools should be used. Thanks to them, organizations will be able to identify key irregularities and then seek solutions for correction and improvement. Achieving high reliability of products, companies are able to fully meet their consumers’ needs. The paper explains the basic concepts related to quality. However, the most important issue is to present an example of solution using the Poka Yoke method, for an electronics company. The company specializes in the production and development of electronic and electromechanical components, for industries of different categories: household appliances, energy, automotive. The presented solution for improvement concerns modernization of workstations.

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Conical Pick Production Process

Bołoz Łukasz, Kalukiewicz Antoni, Galecki Greg, Romanyshyn Liubomyr, Romanyshyn Tara, Barrionuevo-Giménez Rafael

New Trends in Production Engineering

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2020

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Vol. 3, Iss. 1

231--240

EN

One of the basic methods of mechanical rock mining is cutting, which faces increasingly difficult working conditions. Despite the rapid development of machines used in underground and opencast mining as well as in tunnel building, construction industry and road engineering, the problem of insufficient durability of mining tools remains unsolved. In addition to drilling and, to a lesser extent, planing, cutting provides a huge market for tools. Currently, the process of cutting is mainly based on conical picks. The cutterheads of cutting machines are equipped with several dozen, and frequently – more than one hundred conical picks, which, due to their workability and abrasiveness, sometimes work only a few hours. There is a market demand for over two hundred models of conical picks. This is due to the huge variety of shapes and sizes of picks as well as the methods of their mounting in the holder. The article briefly presents various solutions of conical picks, their construction, methods of protection, dimensions and materials used. Next, based on materials produced by ZWM Carbonex, the classic method of their manufacture using the turning technology has been described. The authors have also presented briefly the use of die forging for the large-scale production of picks, applied by Górnicza Fabryka Narzędzi Sp. z o.o.