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Get PriceThe paper presents prediction of wear of roadheader picks using numerical simulations. Estimation of wear has been included into the numerical model of rock cutting based on the discrete element method. The amount of wear is calculated using the classical formula of Archard. The wear model takes the influence of temperature by considering the ...
Get Price2016-9-27 · PARAMETER FOR ROADHEADER CUTTABILITY CERCHAR ABRASIVITY INDEX (CAI) TESTING. 12 • Standard Test Pick Hardness: HRC = 54 - 56 • Optional Test Pick Hardness: HRC = 40 - 42 • Steel Type: Silver Steel 115CrV3 (DIN) • According to −1.2210 Material Number(DIN EN ISO 4597) −107CrV3 KU in Italy (UNI) −F.5125 (120CrV) in Spain (UNE)
Get Price2020-1-1 · Design of roadheader cutters/cutting head. Mechanical rock and coal excavation machines, such as roadheaders, drum shearers and continuous miners, excavate rock material using a number of picks mounted on their cutting heads or drums. The shape of the cutting head and the configuration of the picks influence the performance of roadheaders.
Get Price2008-2-14 · The paper presents prediction of wear of roadheader picks using numerical simulations. Estimation of wear has been included into the numerical model of rock cutting based on the discrete element method. The amount of wear is calculated using the classical formula of Archard. The wear model takes the influence of temperature by considering the ...
Get Price2017-10-27 · Abstract. Conical picks are the key cutting components used on roadheaders, and they are replaced frequently because of the bad working conditions. Picks did not meet the fatigue life when they were damaged by abrasion, so the pick fatigue life and strength are excessive. In the paper, in order to reduce the abrasion and save the materials, ...
Get Price2015-10-1 · Gehring (1989) developed equations for predicting cutting rate of axial and transverse type roadheaders as (1) I C R = 719 U C S 0.78 for transverse type roadheaders, and (2) I C R = 1739 U C S 1.13 for axial type roadheaders, where ICR and UCS are the instantaneous cutting rate (m 3 /h) and the uniaxial compressive strength (MPa), respectively.
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Get Price2016-9-27 · PARAMETER FOR ROADHEADER CUTTABILITY HOW TO ASSESS SPC. 16 0,001 0,010 0,100 1,000 10,000 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 Specific Pick Consumption [picks/solid m³] Uniaxial Compressive Strength [MPa] Specific Pick Consumption (SPC) for Low Speed Cutting with Transverse Cutterhead and 22 mm TC Diameter Picks of ...
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Get PriceWirtgen cutting bits/Conical roadheader coal mining rock drill bit/Roadheader picks. Production information. They are used for rotary driling rig and trenching equipment .Different models are designed according to different geology and applications. Features of trenching: 1.Changeable holder welding position for cutting angle adjusting.
Get Price@article{Liu2019OptimumCD, title={Optimum cutting depth and spacing of roadheader picks: a numerical simulation using a three-dimensional cracking method}, author={Weihuang Liu and J. Cao and Tao He and Gao Gengyuan and H. Li and Z. Yin}, journal={Transactions of The Canadian Society for Mechanical Engineering}, year={2019}, volume={43}, pages ...
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Get Price2017-10-27 · Conical picks are the key cutting components used on roadheaders, and they are replaced frequently because of the bad working conditions. Picks did not meet the fatigue life when they were damaged by abrasion, so the pick fatigue life and strength are excessive.
Get Price2015-10-1 · Performance prediction is an important issue for successful roadheader application and generally deals with machine selection, production rate and bit consumption. The main aim of this research is to investigate the cutting performance (instantaneous cutting rates (ICRs)) of medium-duty roadheaders by using artificial neural network (ANN) approach.
Get Price@article{Liu2019OptimumCD, title={Optimum cutting depth and spacing of roadheader picks: a numerical simulation using a three-dimensional cracking method}, author={Weihuang Liu and J. Cao and Tao He and Gao Gengyuan and H. Li and Z. Yin}, journal={Transactions of The Canadian Society for Mechanical Engineering}, year={2019}, volume={43}, pages ...
Get PriceWirtgen cutting bits/Conical roadheader coal mining rock drill bit/Roadheader picks. Production information. They are used for rotary driling rig and trenching equipment .Different models are designed according to different geology and applications. Features of trenching: 1.Changeable holder welding position for cutting angle adjusting.
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Get PriceThe main elements of the system were high-speed cameras. In conjunction with TEMA Motion 3D software (which is designed to analyze movement based on images registered in videos), this allowed for a detailed analysis of the trajectories of the boom, cutterheads, and cutting picks during the process of cutting.
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Get Price2020-9-28 · The cutting performance of the boom-type roadheader impacts the energy consumption and efficiency of coal mine roadway excavation. The purpose of this work is to investigate the influence of motion parameters on cutting performance. The motion of the cutting head during swing cutting was simplified to establish a numerical model. Rock samples were arranged to perform the swing cutting to …
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Get Price2015-10-10 · The Specific Pick Consumption [picks/solid m³] (SPC), also known as „pick wear rate“ or ... rock mass features on the roadheader cutting process. This effect also has to be considered in the rock mass cuttability assessment. 253 Figure 1. The effect of RMCR on rock mass excavation strength and effective net cutting rate.
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Get Price2008-1-1 · The paper presents prediction of wear of roadheader picks using numerical simulations. Estimation of wear has been included into the numerical model of rock cutting based on the discrete element method. The amount of wear is calculated using the classical formula of Archard. The wear model takes the influence of temperature by considering the hardness of the worn material as …
Get Price2018-6-28 · actual cutting rates per hour or per shift will only be a small and variable fraction of any calculated instantaneous cutting rates. Laboratory cuttability tests are a useful short-cut, in using a small-scale simulation of the action of a real cutting tool as mounted on a roadheader.
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Get PriceThe paper presents prediction of wear of roadheader picks using numerical simulations. Estimation of wear has been included into the numerical model of rock cutting based on the discrete element method. The amount of wear is calculated using the
Get Price2016-9-27 · 2016-9-27 · PARAMETER FOR ROADHEADER CUTTABILITY HOW TO ASSESS SPC. 16 0,001 0,010 0,100 1,000 10,000 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 Specific Pick Consumption [picks/solid m³] Uniaxial Compressive Strength [MPa] Specific Pick Consumption (SPC) for Low Speed Cutting with Transverse Cutterhead and 22 mm TC Diameter Picks …
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Get Price2020-1-1 · Design of roadheader cutters/cutting head. Mechanical rock and coal excavation machines, such as roadheaders, drum shearers and continuous miners, excavate rock material using a number of picks mounted on their cutting heads or drums. The shape of the cutting head and the configuration of the picks influence the performance of roadheaders.
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