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Influence of cutting parameters on the performance of plough during hard rock cutting in coal mining

Palaniappan Sathish Kumar, Chinnasamy Moganapriya, Pal Samir Kumar, Rathanasamy Rajasekar

Journal of Sustainable Mining

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2023

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Vol. 22. iss. 3

185--194

EN

Coal ploughs have proved very successful on many faces in various parts of the world. Recently, there has been a general tendency in longwall working to increase the speed at which the machine progresses along the coal face. An increase in production rate demands enhances either due to depth of penetration or cutting speed. This, in turn, results in increasing power demand and also the force acting on an individual pick. To get maximum efficiency from a cutting machine, a number of parameters need to be investigated. The first and foremost thing of interest is naturally the pick geometry. The cutting force can be expected to depend mainly on the rack angle and clearance angle of the tool. The second parameter is the cutting depth, which when enhanced, increases the rate of advancement and, at the same time, results in enhanced cutting force. This results in large power demand and increases wear of picks. Thirdly, cutting speed, in which higher cutting speed will increase the production rate but at the same time is expected to enhance the power demand and the cutting force. This paper aims at investigating the cutting efficiency of the plough by simulating the coal cutting operation in the laboratory. The effect of three main parameters like pick geometry, cutting depth, and cutting speed, on cutting efficiency have been studied in detail. The cutting force elevates at a faster rate with an increase in depth at higher speeds. The percentage increase in force is nearly 20% for a speed increase of 20%.

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Geometria frezów do wysokowydajnej obróbki stopów aluminium

Burek J, Żyłka Ł., Płodzień M.

Stal, Metale & Nowe Technologie

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2016

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nr 5-6

24--28

PL

W artykule scharakteryzowano wysokowydajną obróbkę stopów aluminium. Opisano geometrię narzędzi frezarskich dedykowanych do wysokowydajnej obróbki stopów aluminium. Przedstawiono modyfikacje zarysu krawędzi skrawającej. Przebadano wpływ ukształtowania krawędzi skrawającej na proces wysokowydajnej obróbki stopu aluminium AlZn5.5MgCu.

EN

The article describes a high-performance cutting of aluminum alloys. There was described a milling cutters geometry dedicated to high performance cutting of aluminum alloys. There was also shown a modification of the cutting edge shape. The influence of the cutting edge shape on the high performance cutting process of aluminum alloy AlZn5.5MgCu was determined.

3

Programowanie obróbki frezu pełnowęglikowego z wykorzystaniem systemu MTS

Burek J., Sałata M., Buk J., Sułkowicz P.

Mechanik

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2016

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R. 89, nr 5-6

468--469

PL

Przedstawiono proces szlifowania i programowania obróbki frezu pełnowęglikowego. Stanowisko badawcze zbudowano na bazie 5-osiowego centrum szlifierskiego Fortis firmy ISOG.

EN

Described in the paper is programming process covering grinding and machining operations in production of the carbide end mills for aluminum alloys. The respective test stand was built with reference to FORTIS 5-axis grinding center from ISOG.