An experimental study of temperature at the tip of point-attack pick during rock cutting process

Shao, Wen; Li, Xingsheng; Sun, Yong; Huang, Han; Tang, Jinyuan

doi:10.1016/j.ijrmms.2018.04.044

Cited by 25 publications

(11 citation statements)

References 44 publications

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“…Thus, at 1.5 mm depth of cut, more volume of rock is needed to be cut as compared to 0.5 mm depth of cut. The temperature increase as the depth of cut increase due to the increasing cross-sectional area of cut and generate more frictional heat [11]. Similar finding can be found in a study conducted by Rajabov et al [15] where mechanical specific energy is analysed.…”

Section: Effect Of Cutting Parameters and Rock Properties On Tempersupporting

confidence: 82%

“…Larger contact length leads to a larger contact area between cutter-rock resulted in higher friction and increasing temperature. Energy consumption to break a fragile material is commensurate with the amount of new surface created [11]. Thus, at 1.5 mm depth of cut, more volume of rock is needed to be cut as compared to 0.5 mm depth of cut.…”

Section: Effect Of Cutting Parameters and Rock Properties On Tempermentioning

confidence: 99%

“…The wire is connected from thermocouple to the signal conditioning circuitry. The voltage is produced when the area between the measurement and reference junction is heated [11]. The magnitude of the produced voltage indicates the difference between the temperature at the junction with the thermocouple connectors and the data logged in the computer software [12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Interaction Effect of Depth of Cut, Back Rake Angle and Rock Properties on Temperature of Single Polycrystalline Diamond Compact Cutter

Abdullah

Maoinser

Rahim

2020

IJE

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Section: Effect Of Cutting Parameters and Rock Properties On Tempersupporting

confidence: 82%

Section: Effect Of Cutting Parameters and Rock Properties On Tempermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Interaction Effect of Depth of Cut, Back Rake Angle and Rock Properties on Temperature of Single Polycrystalline Diamond Compact Cutter

Abdullah

Maoinser

Rahim

2020

IJE

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“…The rock cutting process with a chisel pick or conical pick of the CSD can be characterized by an increase in the cutting force as the picks penetrate into the rock. At the same time, a crushed zone is generated in front of the pick tip [31,[43][44][45][46]. When the cutting force reaches a critical value, a rock chip is produced with an instantaneous reduction in cutting force.…”

Section: Introductionmentioning

confidence: 99%

An Analytical Model for Rock Cutting with a Chisel Pick of the Cutter Suction Dredger

Ouyang

Yang

Chen

et al. 2020

JMSE

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Cutter suction dredgers are important pieces of rock excavation equipment in port and waterway construction. It is valuable but difficult to properly estimate the cutting force on the chisel pick of the cutter suction dredger. In this paper, an analytical model, called the crushed zone expansion induced tensile failure model (CEIT model), is proposed for rock cutting with a chisel pick in order to predict the peak cutting force (Fc) more accurately. First, a review of the existing models for rock cutting with a chisel pick is presented. Next, based on the tensile breakage theory, cavity expansion theory and some hypotheses, the mathematical formula of the CEIT model is obtained. Different from that in the previous models, the effect of the rock on both sides of the chisel pick on Fc, defined as the sidewall effect is considered in the CEIT model. Then, the predicted Fc by the CEIT model is compared with the predicted Fc by existing theoretical models and experimental results to check the validity of the CEIT model. The results show that the CEIT model can well capture the relationships of Fc to the cutting parameters, including cutting width, cutting depth, and rake angle, and can predict the experimental results much better than the existing models. Finally, the sidewall effect and its influence factors according to the CEIT model are discussed.

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“…PCD is generally suitable for operational temperature below 750 • C [9]. Higher thermal stability is critical for hard rock cutting tools because research has revealed that the temperature at the contact area between cutting tip and rock surface can reach as high as 1100 • C [10]. High wear resistance and high thermal stability make TSDC a potentially superior material for hard and abrasive rock cutting.…”

Section: Introductionmentioning

confidence: 99%

Failure Probability Prediction of Thermally Stable Diamond Composite Tipped Picks in the Cutting Cycle of Underground Roadway Development

Sun

Guo

2019

Applied Sciences

Self Cite

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The Thermally Stable Diamond Composite (TSDC) tipped pick has been developed to replace Tungsten Carbide (WC) tipped picks for hard rock cutting. Due to the material properties of TSDC, a major failure mode of TSDC tipped picks during rock cutting is random failures caused by excessive bending force acting on the cutting tips. A probabilistic approach has been proposed to estimate the failure probability of picks with this failure mode. However, there are two limitations in existing research: only one drum revolution is considered, and the variation of rock thickness is ignored. This study aims to extend the current approach via removing these limitations, based on the failure probability analysis of picks over a full cutting cycle in the underground coal mining roadway development process. The research results show that both drum advance direction and the variation of rock thickness have significant impacts on pick failure probability. The extended approach can be used to estimate pick failure probability for more realistic scenarios in real applications with improved accuracy. Although the study focused on TSDC tipped picks, the developed approach can also be applied to other types of picks.Picks are a type of rock cutting tool which are broadly equipped on excavation machines such as continuous miners and roadheaders to break rock in the mining and construction industries. Understanding the performance and reliability of picks is important for industries to increase production efficiency, improve production safety and reduce production cost [11,12]. Many efforts including laboratory experiments and field trials have been made to study picks from various aspects . An important aspect of these studies is pick force analysis [4,5,[12][13][14][15][16][17][18][19]. During the course of rock cutting, a pick is generally subjected to three orthogonal forces-cutting force, normal force and lateral force [13]. These forces can be affected by various factors including depth of cut (DOC) [5,[12][13][14][15], rock strength [13-15] and attack angle [5]. Another important aspect of pick performance study is failure analysis [11,12,17,[20][21][22]24,25], including identification of typical pick failure modes [17], investigation of the causes of high consumption of picks [12], protection of pick body by use of a cap tip [12,20] and understanding of the body bending failures of picks [21].Although existing studies largely focused on WC tipped picks, studies with a focus on the performance and failure characteristics of TSDC tipped picks have also been carried out (see [3][4][5][6]11,25]). These studies showed that while TSDC tips were able to cut hard rock with a uniaxial compressive strength of 260 MPa [24], they were less capable to bear bending and impact forces than WC tips due to their lower toughness [5]. Failures caused by excessive impact or bending forces were a major concern for TSDC tipped picks [11]. Therefore, it is important to predict the failure risk of TSDC tipped picks which are subjected to excessive bending...

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An experimental study of temperature at the tip of point-attack pick during rock cutting process

Cited by 25 publications

References 44 publications

Interaction Effect of Depth of Cut, Back Rake Angle and Rock Properties on Temperature of Single Polycrystalline Diamond Compact Cutter

Interaction Effect of Depth of Cut, Back Rake Angle and Rock Properties on Temperature of Single Polycrystalline Diamond Compact Cutter

An Analytical Model for Rock Cutting with a Chisel Pick of the Cutter Suction Dredger

Failure Probability Prediction of Thermally Stable Diamond Composite Tipped Picks in the Cutting Cycle of Underground Roadway Development

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