Field and laboratory studies on natural stones leading to empirical performance prediction of chain saw machines

Copur, Hanifi; Balcı, Cemal; Tumaç, Deniz; Bilgin, N.

doi:10.1016/j.ijrmms.2010.11.011

Cited by 49 publications

(29 citation statements)

References 14 publications

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“…The cutting depth depends on the operational parameters and the length of the sequence. Based on previous research, it can be concluded that the reduction of the cut depth would reduce the efficiency of chain saws (Copur, 2010;Copur et al, 2011). In contrast to this, a larger cut width can only be achieved through the change of the chain construction, i.e.…”

Section: The Impact Of Area and Shape Of Tool Cut On Chain Saw Performentioning

confidence: 99%

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2016

MGPB

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The cutting design of the chain saw is defined by the number, the arrangement and the geometry of the cutting tools. When using chisel cutting tools, the cross sectional area of the cut and the shape of the groove are determined by the width and depth of the cut. The laboratory tests analyzed the impact of the cross sectional area and the shape of the cut on the forces and the specific energy. The testing was performed on a linear cutting machine with tool holders and cutting tools in real-scale size. According to the processed statistical data, increasing the cross sectional area of the cut reduces the specific energy, whereby the width of the cut has a considerably larger impact. The tests have shown that besides the cross sectional area of cut, the shape of the surface also affects the forces and specific energy. Through increasing the width to depth ratio upon a constant cross sectional area of the cut, the value of the specific energy and the cutting forces are reduced. Above the width to depth ratio of 2.5 the cutting forces and the specific energy appear to be constant.

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Section: The Impact Of Area and Shape Of Tool Cut On Chain Saw Performentioning

confidence: 99%

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2016

MGPB

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“…There are many parameters influencing the cutting performance of a heavy weight axial and transverse roadheader, some of which are listed 5) .…”

Section: Performance Of Havy Weight Roadheadersmentioning

confidence: 99%

Identification of heavy weight type roadheaders performance based on field data

Sutoh

Matsumoto²

2015

JSCE Ser. F1

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In Japan, it is necessary to excavate many hard rock tunnels using a heavy weight (200-300kW class) axial and transverse cutter head type roadheaders, which has reason for various conditions of saving the environment from the construction site and so on. And the performance of a heavy weight axial and transverse cutter head type roadheaders is a critical issue in assessing technical and economic feasibility of its application in many tunneling projects.Therefore, we has established a database of heavy weight axial and transverse cutter head type roadheaders performance, which based on the interview for engineer's of many tunnel construction projects. This database contains field data from the civil construction operations all over Japan, includes a variety of heavy weight roadheaders of different geotechnical conditions and different cutter head type. And, this database refers to accurate estimation of the production rate, machine utilization and picks consumption for different geological units to be encountered on the tunnel project planning.This paper presents and discusses the performance estimation model of instantaneous cutting rate (ICR) and pick consumption which was introduced rock quality designation index (RQD) from this database. Especially this database established form hard rock tunnel excavated data using heavy weight (200-300kW class), axial and transverse cutter head type road headers.

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“…Destruction process modelling has become the topic of active research since the 2000 th [19][20][21][22][23][24]. Some studies are devoted to applying the results of research of cutting process in different kinds of equipment [25][26][27][28][29]. The significant part of research made by Kuzbass scholars (Western Siberia, Russia) belongs to improving characteristics of cutting instruments for rock destroying in coal mines and pits [30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

The results of cutting disks testing for rock destruction

et al. 2017

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Abstract.To determine the rational order of disk tools placement on the working body is necessary to know the maximum amount of rock, destroyed by the disk tool in benching cutting mode depending on the tool geometry parameters, physical and mechanical parameters of rocks. The article contains the definition of rational parameters of cutting disk tools as well as power and energy parameters of the destruction process by cutting disks and by executive body of the coal cutter. The rational geometric parameters of cutting discs are specified. It was found that each step of cutting with a minimum depth of penetration has its own maximum height of bench outcrop. The dependence of the volumes of large items destroyed by the disk tool on the cutting step height was determined. The existence of the cyclic alternation of destruction phases, regardless the fracture parameters, the height of the ledge outcrop, and tools like free cutting geometry were found. In contrast to the free cutting in benching mode of destruction two large fragments of rocks in one cycle were observed. Consequently, the cyclical nature of the destruction process in the benching mode will be characterized by two chips and crushing, and this cycling repeats throughout the destruction process with the same parameters of destruction.

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Field and laboratory studies on natural stones leading to empirical performance prediction of chain saw machines

Cited by 49 publications

References 14 publications

Untitled

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Identification of heavy weight type roadheaders performance based on field data

The results of cutting disks testing for rock destruction

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