Статті в журналах: "Boring cutter"

1

Zhao, Xiao Xu, and Ya Dong Gong. "Research on the Load on Cutter Head of Hard Rock Tunnel Boring Machine." Applied Mechanics and Materials 684 (October 2014): 303–7. http://dx.doi.org/10.4028/www.scientific.net/amm.684.303.

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Study on the load exerted on cutter head is very useful for the design and performance prediction of hard rock tunnel boring machines. A composite model based on smoothed particle hydrodynamics and finite element method was carried out using AUTODYN software to study the rock fragmentation mechanism of constant cross-section disk cutters in cutter head. The normal force, rolling force and side force on the disk cutters with different cutter radius were researched in the numerical simulation study. The results were verified by historical literature data. To obtain the distribution of the forces with different cutter radius, the loading of cutter head of a Ф5.75 hard rock tunnel boring machine were analyzed. The result shows that it is useful for cutter head’s design and its layout optimization.

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2

Wang, Teng Yue, Ke Zhang, Hong Sun, Yu Hou Wu, and Kai Jun Zhao. "Analysis on the Stress and Failures of Disc Cutter of Full Face Rock Tunnel Boring Machine." Advanced Materials Research 102-104 (March 2010): 223–26. http://dx.doi.org/10.4028/www.scientific.net/amr.102-104.223.

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Full face rock tunnel boring machine (TBM) plays an important role in boring rock of tunnel. The failure of disc cutter is the main reason leading to low efficiency of TBM. In this paper, analysis of force and motion for disc cutter are carried by using ABAQUS to study stress distribution and concentration in disc cutter and rocks. Influence of different rocks on stress in disc cutter is analyzed. By combination the failure modes of disc cutter and its stress distribution, methods of decreasing failures of disc cutter are presented. Wear resistance and service life of disc cutter are improved by matching the materials of disc cutters with rocks. The results are useful for structural optimization and strengthening treatment of material of disc cutter.

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3

Zhu, Li Da, Peng Cheng Su, Gang Li, and Wan Shan Wang. "Dynamic Analysis of Cutter Head System in Tunnel Boring Machine." Advanced Materials Research 186 (January 2011): 51–55. http://dx.doi.org/10.4028/www.scientific.net/amr.186.51.

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To obtain the reasonable layout and structure shapes of the various kinds of cutters in tunnel boring machine (TBM), the kinematic/dynamic of cutter head system was analyzed by using virtual prototype and finite element method (FEM). The velocity and force curves were got from different positions of cutters and the mode vibration of scrapers and cutter hobs were obtained to analyze their structural performances next stage. It is shown that these results can provide references for dynamic optimization design of tunnel boring machine. Therefore, it is necessary to implement kinematic/dynamic analysis and mode analysis before manufacture of production.

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4

Orgiyan, A., G. Oborskyi, A. Balaniuk, V. Kolesnik, and V. Dotsenko. "INFLUENCE OF CUTTING MODES ON WEAR RESISTANCE OF CUTTERS AND ACCURACY OF FINE BORING OF STEELS." Odes’kyi Politechnichnyi Universytet Pratsi 2, no. 64 (2021): 13–21. http://dx.doi.org/10.15276/opu.2.64.2021.02.

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This paper is devoted to experimental study of fine boring of steels, which improves performance and parameters of processing accuracy. The conditions that ensure high wear resistance of cutting blades and improvement of accuracy parameters and processing quality were determined by changing cutting conditions and special geometry of carbide cutters with chip-curving chamfers. In the experiments, single-cutter boring was used, as well as double-cutter according to the feed division method. On the basis of the method of planning an experiment in the presence of a large number of variable input parameters, rational values of speed, feed, depth of cut, as well as parameters of roughness, taper and deviations from the roundness of the machined holes are established. The effect of fine boring modes on wear and tool life of cutting edges has been clarified. The influence of the compliance of cantilever boring bars on the level of oscillation of the cutter was also studied. It was found that intense vibrations occur for boring bars of small diameter <10 mm at a depth of cut >0.1 mm, resulting in intensive wear of the cutters. In preliminary experiments, it was found that boring of soft parts (type 20X and steel 30) is significantly different from machining harder steels and requires the use of other cutting conditions. Although the groups of structural carbon, high-quality and alloy steels may differ insignificantly in terms of processing conditions and the results achieved in the process of fine boring, however, for processing steels with special properties, a distinctive feature arises, namely increase in the level of vibrations with increasing cutting speed within the range usually used for other steels. This paper shows results of an experimental study of the process of thin boring of 35L steel with cutters made of TЗ0K4 hard alloy and chip-curving chamfers along the cutting blades.

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5

Zhang, Yu, Xing Wen Wang, and Hui Fang Liu. "Numerical Simulation of Rock-Breaking Process by Disc Cutter in Tunnel Boring Machine." Applied Mechanics and Materials 487 (January 2014): 513–16. http://dx.doi.org/10.4028/www.scientific.net/amm.487.513.

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The force load research of disc cutter can be used in the design of disc cutter, in order to improve the working life, determine when to change another cutter. Based on the working platform of ABAQUS finite element analysis module, single disc cutter rock-breaking of the simulation model is established, and according to the theory of rocks plastic rule, dynamics analysis and dynamic simulation are done when the cutter is in rock-breaking process by which, the added force can be got when the disc cutter and rocks contact each other in different wear conditions of contact force in the process of the dynamic contact each other. The results show that with the cutter damage increasing, the added force is increased and cutters maximum instantaneous stress load is 1.5 ~ 2.5 times than the average stress load, which has a negative influence on working efficiency. To have a clear understand of cutters design and working life and when to change another cutter in working time, the results also offer an engineering parameters for researching the load state of TBM tunneling.

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6

Cheng, Jun, Ya Dong Gong, Hai Feng Zhao, Yue Ming Liu, and Jian Yu Yang. "A Nonlinear Multi-Objective Optimal Design for Cutter Head of TBM." Applied Mechanics and Materials 80-81 (July 2011): 1046–50. http://dx.doi.org/10.4028/www.scientific.net/amm.80-81.1046.

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This paper presents a novel model of lay out of cutter head of TBM(tunnel boring machine). Rock-broken mechanism during the operation of the cutter head is analyzed to study the layout of cutters. A model of the cutters under the action of forces during TBM’s working has therefore been developed, thus proposing a scheme to improve the rock breakability of TBM’s cutter head on which the cutters are lay out. Then, a nonlinear multi-objective mathematical model with complex constraints is developed, with an optimization program provided via an intelligent algorithm for the layout design of cutters on the cutter head of a TBM. The cutter head of an EPB6.28 TBM, an optimized design is given to set up a prototype with digitized cutter head, to which a simulation is done for the verification of equilibrium of forces. Comparing analytically the cutter wear and equilibrium of forces between a previous and a newly designed cutter heads, the results shows digitally that the new one is more practicable than the previous one.

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7

Li, Gang, Li Da Zhu, Jian Yu Yang, and Wan Shan Wang. "A Method to Predict Disc Cutter Specific Energy for TBM Based on CSM Model." Applied Mechanics and Materials 236-237 (November 2012): 414–17. http://dx.doi.org/10.4028/www.scientific.net/amm.236-237.414.

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By using fracture mechanics theory of rock, the rock fragmentation mechanism of tunnel boring machine (TBM) cutters is analyzed and the analysis of forces of cutter is carried out. A new method to predict disc cutter specific energy for TBM is developed in this study. By using the dynamic models of TBM cutters interaction with the rock, specific energy prediction model for TBM cutter head is developed. The data from the actual tunnel construction is analyzed by using an example of Qinling tunnel and the comparison is made with the field data. The results indicate that the model developed in this study could not only replace the experiment to disc cutter specific energy for TBM, but also provide a theoretical basis for the performance prediction and optimal design of cutter head for TBM.

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8

Zhou, Peng, Chao Wang, Wei Xian Gao, and Yu Hou Wu. "Research on the Rock Breaking by Double Disc Cutter Test-Bed." Advanced Materials Research 690-693 (May 2013): 2484–89. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.2484.

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Rock tunnel boring machine is one of the main machineries and equipments for underground engineering, and the failure of tool systems is its main failure form. Rock hob test-bed is the only testing equipment for tool failure and wear. In this paper, the breaking rock by the double disc cutter is simulated and four kinds of rocks are selected to test the influece of rock characteristics and spacing between two disc cutters on the rock breaking by the double disc cutter test-bed. The results show that there is different optimal spacing between two disc cutters for different rock; the optimal spacing is inversely proportional to the hardness of the rocks; the maximum stress appears the boundary between the disc cutter and rock.

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9

Meng, Zhichao, Dongjian Yang, Junzhou Huo, Puzhou Zhuo, and Youneng Bao. "Development and Performance Evaluation of an Integrated Disc Cutter System for TBMs." Applied Sciences 11, no. 2 (January 11, 2021): 644. http://dx.doi.org/10.3390/app11020644.

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Changing the cutter is an essential procedure in tunnel boring machine (TBM) operations. The danger and low efficiency of manually replacing the disc cutter has led engineering equipment designers to study technologies to automate the changing of cutters. The key step is to design a new integrated disc cutter (simplifying the replacement process) to facilitate robot operation. Until now, the design and research of new integrated disc cutter systems has mainly relied on inspiration. In this paper, a solution space of a certain configuration of an integrated disc cutter system based on topology theory was designed. The evaluation system for the solution space was constructed by the analytic hierarchy process (AHP), and the optimal scheme of the configuration was finally obtained. In addition, experiments and simulations show that the structural strength and anti-loosening performance of the new disc cutter system meet the engineering requirements. Application of topology theory and the new evaluation system provides useful theoretical analyses and guidance for the design of new cutter systems.

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10

Meng, Zhichao, Dongjian Yang, Junzhou Huo, Puzhou Zhuo, and Youneng Bao. "Development and Performance Evaluation of an Integrated Disc Cutter System for TBMs." Applied Sciences 11, no. 2 (January 11, 2021): 644. http://dx.doi.org/10.3390/app11020644.

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Анотація:

Changing the cutter is an essential procedure in tunnel boring machine (TBM) operations. The danger and low efficiency of manually replacing the disc cutter has led engineering equipment designers to study technologies to automate the changing of cutters. The key step is to design a new integrated disc cutter (simplifying the replacement process) to facilitate robot operation. Until now, the design and research of new integrated disc cutter systems has mainly relied on inspiration. In this paper, a solution space of a certain configuration of an integrated disc cutter system based on topology theory was designed. The evaluation system for the solution space was constructed by the analytic hierarchy process (AHP), and the optimal scheme of the configuration was finally obtained. In addition, experiments and simulations show that the structural strength and anti-loosening performance of the new disc cutter system meet the engineering requirements. Application of topology theory and the new evaluation system provides useful theoretical analyses and guidance for the design of new cutter systems.

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11

Agrawal, Anil Kumar, Somnath Chattopadhyaya, V. M. S. R. Murthy, Stanisław Legutko, and Grzegorz Krolczyk. "A Novel Method of Laser Coating Process on Worn-Out Cutter Rings of Tunnel Boring Machine for Eco-Friendly Reuse." Symmetry 12, no. 3 (March 17, 2020): 471. http://dx.doi.org/10.3390/sym12030471.

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Cutter rings form an integral part of tunnel boring machines (TBM). These cutters are deployed in various hard rock tunneling projects. The life of the cutter rings governs the economics of tunneling significantly. This paper presents a novel methodology to enhance hardness and wear resistance of used worn out disc cutters in TBM for eco-friendly reuse. Disc cutters are mainly made of H13 tool steel. To improve the hardness and wear resistance, a layer of tungsten carbide is coated on the used cutter rings. Considering the long operating hours of TBM, cutter rings get worn out due to severe interaction with the hard rock both in compression and rolling mode. Replacement of the cutter-ring is costly, and quite a time consuming and cumbersome job. Refurbishment is always a better option and laser cladding is a novel technique for enhanced life of cutters. It increases the hardness and wear resistance of the cutters to a considerable extent. Cladding is carried out with the help of a laser beam. In this method, a layer of nanoparticles of tungsten carbide powder is deposited on the worn-out surface of the cutters. For carrying out the investigation, different coating parameters are selected based on the central composite design (CCD). With different capacities of laser, a total of 13 samples were prepared at various scanning speeds varying between 200 to 300 mm/min and a level of laser power varying between 100 to 200 W. The coating is critically inspected by various means such as an optical microscope, FESEM, and EDS. Hardness testing was accomplished by Vicker’s hardness testing machine. Wear testing was carried out with the aid of pin on disc setup. The results shows an asymmetrical behavior between the yield parameters (hardness and wear rate) and process parameters (scanning speed and laser power). The hardness values increased from 16% to 95%. A correlation test was conducted between the hardness and wear rate. The results depict a clear negative correlation between them, indicating the advantage of laser coating for reducing cutter ring wear in TBM.

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12

Zhou, Peng, He Wang, De Fang Zhou, Jian Sun, and Zi Nan Wang. "The Reliability Factor Analysis of Rock Tunnel Boring Machine Cutter System." Applied Mechanics and Materials 373-375 (August 2013): 2082–87. http://dx.doi.org/10.4028/www.scientific.net/amm.373-375.2082.

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Tunnel Boring Machine (TBM) is a major equipment used in underground engineering and Cutter disk system is its major parts, which affect sharply its capability. The force and vibration characteristics of the cutter system are simulated in this paper, and the effects of its force and vibration on the cutter system reliability are analyzed. These results show that there are the most stress and the worst reliability in these joints between the cutterhead and main driver, the cutterhead and the hob, and cutter ring. These research results are very helpful for increasing the reliability and application of the rock boring machine.

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13

Yu, Da Guo, Xing Quan Shen, and Ji Ming Wang. "Innovative Design of Device of Conical Deep-Hole Boring." Applied Mechanics and Materials 271-272 (December 2012): 969–73. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.969.

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The device is designed for the solutions of the ready-deformation, hard feeding of the boring rod of conical deep-hole boring, and of impossible boring by the gun drill, BTA drill and DF drill during conical deep-hole boring. The central hole of the boring rod is fitted with boring cutter, rod with double cones, cylindrical rod, threaded and splined rod. The front cone of the rod with double cones is set through the conical hole of boring cutter and reaches only one side of the hole. The rear one of the rod with double cones is in contact with the one end of the springing rod of which the other reaches the surface of bored work piece. The industrial endoscope is set within the hole drilled in boring rod. The servo motor, by the way of NC device, is linked with pulse generator, which connects the principal axis of lathe. The design is advantaged with a springing rod which prevents the deformation of boring rod, and with servo motor, NC device, and industrial endoscope supporting conical deep-hole boring of high precision.

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14

Guo, Zhenggang, Juan Wang, Shuai Lv, Deyue Yu, and Xu Zhang. "Rock Breaking Performance of Two Disc Cutters of Tunnel Boring Machine for Safe Tunneling in Unstable Coal Rock Stratum." International Journal of Safety and Security Engineering 10, no. 5 (November 30, 2020): 639–46. http://dx.doi.org/10.18280/ijsse.100508.

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In unstable coal rock formations, the rescue channels should be constructed through safe and efficient tunneling. The rock breaking performance of the tunneling equipment directly hinges on the cutter-head layout. Focusing on the conditions of unstable coal rock formation, this paper adopts the extended Drucker-Prager (D-P) plastic model to define the properties of bedrock materials of the coal rock with low mechanical strength and poor homogeneity. Then, a finite-element model was established on ABAQUS for the coal rock cut by two disc cutters, and used to simulate the breaking of the coal rock and the peeling of slags from the bedrock. On this basis, the authors analyzed the influence of cutter spacing (30, 35, 40, and 45mm) over cutting force, rock breaking amount, and specific energy under two cutting methods: simultaneous cutting and sequential cutting. Finally, a cutter deployment strategy was designed for safe and efficient tunneling in unstable coal rock formations. The results show that: Under simultaneous cutting, as the cutter spacing increased from 30 to 35mm, the rock breaking amount increased, while the specific energy declined; as the cutter spacing further rose from 35 to 45mm, the rock breaking amount dropped, while the specific energy increased. Under the coal rock conditions in our research, the optimal cutter deployment strategy is: simultaneous cutting with cutter spacing of 35mm. The research results provide theoretical support for the cutter-head design of rescue equipment for collapsed coalmines.

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15

Wu, Yu Hou, Jian Sun, Hong Sun, Albert J. Shih, and X. Q. Zhao. "Design and Simulation of the Hydraulic System for the Disc Cutter of the Rock Hob Test-Bed." Key Engineering Materials 499 (January 2012): 51–55. http://dx.doi.org/10.4028/www.scientific.net/kem.499.51.

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Rock tunnel boring machine is one of the main machineries and equipments for underground engineering, and the failure of its disc cutter is the main failure form of this machinery. The experiment on the failure and wear of the disc cutter is difficult. In this paper, a rock hob test-bed is designed, and the hydraulic-driven system of its disc cutter of rock hob test-bed is simulated; the effect of load and flow rate of hydraulic oil in this hydraulic system on characteristics of this disc cutter system is analyzed. The results show that the vertical movement speed of disc cutter is directly proportional to the flow rate; the effect of the load on this speed and the vertical pressure can be ignored; the delay time of the movement of the disc cutter to the flow rate of hydraulic oil is proportional to the load. These results are very helpful to the structure optimization of disc cutter system of rock tunnel boring machine and the improvement of working efficiency.

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16

Liu, Yang, Shuaiwen Huang, Di Wang, Guoli Zhu, and Dailin Zhang. "Prediction Model of Tunnel Boring Machine Disc Cutter Replacement Using Kernel Support Vector Machine." Applied Sciences 12, no. 5 (February 22, 2022): 2267. http://dx.doi.org/10.3390/app12052267.

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During tunneling processes, disc cutters of a tunnel boring machine (TBM) usually need to be frequently and unexpectedly replaced. Regular inspections are needed to check disc cutters’ status, which significantly reduces the work efficiency and increases the cost. This paper proposes a new prediction model based on TBM operational parameters and geological conditions that determines whether disc cutter replacement is needed. Firstly, an evaluation criterion for whether the cutters need to be replaced is constructed. Secondly, specific parameters related to the evaluation criterion are analyzed and 18 features are established on tunneling monitoring information. Then, the mapping model between the cutter replacement judgement and the established features is built based on a kernel support vector machine (KSVM). Finally, the data obtained from a Jilin water transport tunnel project is utilized to verify the performance of the proposed model. Test results show that the new model can obtain an average accuracy of 90.0% and an average F1 score of 86.2% on field data prediction based on data from past tunneling days. Therefore, the proposed data-predictive model can be used in tunneling to accurately predict whether disc cutters need to be replaced before human judgment, and thereby greatly improve tunneling safety and efficiency.

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17

Wu, Qi Xing, Guang Feng An, Xiao Wen Zhou, and Lin Chen. "Numerical Simulation of Rock Breaking by Disc Cutter of Tunnel Boring Machine." Applied Mechanics and Materials 638-640 (September 2014): 888–93. http://dx.doi.org/10.4028/www.scientific.net/amm.638-640.888.

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By using the explicit nonlinear dynamic analysis program of LS-DYNA, three-dimension finite element model of rock breaking by disc cutter of tunnel boring machine is established, in which elastic material is adopted to describe the elastic behavior of cutter ring and Holmguist Johnson Concrete (HJC) model is adopted to describe the brittle behavior of rock. With the finite element method, the process of rock breaking by disc cutter is simulated, and then the movement characteristics, forces of disc cutter and rock fragmentation mechanism are analyzed. The results indicate that the numerical technique can contribute to gaining an understanding of rock breaking mechanism by disc cutter and improving the design of disc cutter parameters.

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18

Li, Feng Hua, Zong Xi Cai, and Yi Lan Kang. "A Theoretical Model for Estimating the Wear of the Disc Cutter." Applied Mechanics and Materials 90-93 (September 2011): 2232–36. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.2232.

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In this paper a method for evaluating the slip speed in rolling contact is introduced from the contact mechanics viewpoint. Based on the analysis of the wear factors of the disc cutter, a theoretical model which includes disc cutter structural parameters and boring parameters is proposed to estimate the wear of the disc cutter in normal wear conditions. This theoretical model provides a basis for estimating the wear of the disc cutter and determining the replacing time of the disc cutter.

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19

Sun, Chenchen, Guofang Gong, Huayong Yang, and Shuai Wang. "Optimal control of a novel cutter head driving system for tunnel boring machine." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 234, no. 2 (March 1, 2020): 369–78. http://dx.doi.org/10.1177/1464419320907432.

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The cutter head of a tunnel boring machine may be trapped in extremely adverse geological environments, which requires a large enough driving torque to get rid of the trapped condition. In this paper, a novel driving scheme is proposed to improve the driving performance of the tunnel boring machine cutter head without increasing the installation power. First, the hydro-viscous clutch is introduced to achieve the soft start of the cutter head by the flexible effect of viscous oil film. Then, the flywheel is employed as the energy storage element to provide sufficient torque during the hydro-viscous clutch engagement, which assists the cutter head to get rid of the trapped condition. Moreover, an optimal state feedback control law based on a linear quadratic regulator is designed by compromising system impact and hydro-viscous clutch friction loss to optimize the hydro-viscous clutch engagement process and achieve favorable driving performance of the cutter head. Finally, numerical simulations are conducted to validate the effectiveness of the proposed driving technology.

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20

Pu, Y., Jian Qin Liu, and Wei Guo. "Kinematics Modeling and Analysis of TBM Disc Cutter Based on D-H Matrix." Materials Science Forum 697-698 (September 2011): 692–96. http://dx.doi.org/10.4028/www.scientific.net/msf.697-698.692.

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The objective of this paper was to study tool wear condition and to guide the cutter configuration by studying the movement of the disc cutter of all-section rock Tunneling Boring Machine(TBM).Through the analysis of rock destruction process by disc cutter based on spatial geometry theory and D-H matrix, the kinematic model of work cutter in rock destruction process was established and the movement law of cutting-tool is concluded, which are beneficial for the research on wear of disc cutter, structural design and optimization design of cutting tool configuration.

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21

Shi, Hongbing, Xing Huang, Bin Liu, Shuai Luan, Linfeng Li, Shaoran Liu, and Xingli Lu. "Study on Rock Cutting Mechanism and Efficient Shield Tunneling Control in Mixed-Ground with Different Strengths." Journal of Physics: Conference Series 2185, no. 1 (January 1, 2022): 012062. http://dx.doi.org/10.1088/1742-6596/2185/1/012062.

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Abstract Mixed ground condition exerts very significant influences on the rock fragmentation mechanism, rock cutting efficiency, and operational parameters selection of the shield boring machine. In order to reveal the rock cutting mechanism when the shield tunnel boring machine advances through the mixed grounds in Line 13 of the Shenzhen Metro Tunnels, according to several linear cutting tests were conducted using a constant cross-section disc-cutter and five rock types with different strengths. The change of disc-cutter cutting force and rock boreability index were analyzed, and some suggestions were proposed to fulfill the safe and efficient tunneling of the shield machine in mixed ground conditions. The results of this study can offer useful suggestions for the operation parameter selection of the shield tunnel boring machine tunneling through the mixed ground in the Shenzhen Metro Line 13 and similar projects.

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22

Zhao, Nan, and Li Wei Song. "Research on Breaking Energy Mechanism of Tunnel Boring Machine Disc Cutter Rock with CSM Model." Applied Mechanics and Materials 651-653 (September 2014): 988–91. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.988.

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Full face rock tunnel boring machine in construction process, disc cutter put pressure on rock breaking, actually belongs to the process of energy transfer, from the point of view of energy analysis the energy transfer rules in the process of disc cutter rock breaking, based on CSM force prediction model, analysis disc cutter energy input and rock mass energy output efficiency ratio, for excavation with minimum energy efficiency. Taking S-536 Hong Kong water tunnel TBM as an example, When the penetration is 10mm, based on the energy efficiency ratio the optimal disc cutter spacing should be less than 70mm, than the actual average disc cutter spacing is small 2mm, rock mass as a reference the disc cutter rock breaking efficiency mechanism provides certain reference value for the cutter layout.

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23

Wang, He, Yu Hou Wu, Hong Sun, Teng Yue Wang, and Kai Jun Zhao. "Characteristics Analysis of TBM Disc Cutter Ring." Advanced Materials Research 102-104 (March 2010): 219–22. http://dx.doi.org/10.4028/www.scientific.net/amr.102-104.219.

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Disc cutter is the key part in Tunnel Boring Machine (TBM). Wear and tear of disc cutter is the main reason of low efficiency and high cost of this machine. Forces and deformations of disc cutter ring are foundation for its design and assembly. In this paper, the analysis of stress and deformation are carried to study their distribution; Wear mechanism of disc cutter ring is presented; modal analysis is carried to study the vibration of disc cutter ring. The results show the yield strength and rigidity of disc cutter ring is very high; disc cutter ring can avoid resonance and meet the engineering requirement. The results are very helpful for digital design of disc cutter ring used in different geology conditions.

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24

Hong, Kai Rong, Hai Jun Zhao, Jia Dong Chang, Hai Xia Wang, Kui Chen, and Feng Yuan Li. "Study on Dynamic Performance of Cutter Head and Cutter System of Rock Tunneling Set-up." Applied Mechanics and Materials 143-144 (December 2011): 512–16. http://dx.doi.org/10.4028/www.scientific.net/amm.143-144.512.

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Several modals on Tunnel Boring Machine (TBM) in tunneling are introduced, the revolving rock tunneling simulator set-up is designed, the finite element model of cutter parts of the experimental bench is built, and free mode analysis of it is performed, and the model on system of cutter head, cutter and rock is established. It is shown that natural frequency on the cutter parts is higher, the frequency of first step is 4536Hz, and the most modes are deformations of the cutter loop, vibration acceleration of the cutter decreases with fracture tunnel width increasing, in some degree broken rock mechanics is achieved, foundation is provided for improving using life and adaptability of the cutter, and optimizing arrangement of plate cutter on the cutter head, and finally realizing high efficiency and low energy consumption.

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25

Zhabin, A. B., A. V. Polyakov, E. A. Averin, and Yu N. Linnik. "Design basis for tunnel boring machine cutter heads." Mining Informational and analytical bulletin 6 (2019): 156–64. http://dx.doi.org/10.25018/0236-1493-2019-06-0-156-164.

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26

Macias, Francisco Javier, Jarand Naerland, and Nuria Espallargas. "Cutter wear mechanisms in hard rock tunnel boring." Geomechanics and Tunnelling 11, no. 2 (April 2018): 123–30. http://dx.doi.org/10.1002/geot.201800003.

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27

Zhang, Qinglong, Yanwen Zhu, Canxun Du, Sanlin Du, Kun Shao, and Zhihao Jin. "Dynamic Rock-Breaking Process of TBM Disc Cutters and Response Mechanism of Rock Mass Based on Discrete Element." Advances in Civil Engineering 2022 (January 11, 2022): 1–10. http://dx.doi.org/10.1155/2022/1917836.

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Rock-breaking efficiency of full-face rock tunnel boring machine (TBM) is closely related to the performance of the disc cutter and the characteristics of the rock mass. In the point of view of mesomechanics, the particle flow code (PFC) is used to establish a numerical model of the rock mass and the disc cutter, and the process of TBM disc cutter intrusion into the rock mass is analyzed. The dynamic response mechanism and crack evolution process of the rock mass under the action of the disc cutter are studied on the basis of micromechanics, and the relationship between the rock mass crack, penetration, and cutting force during the intrusion of the disc cutter is revealed. The sensitivity analysis is carried out on the confining pressure conditions and the influence parameters of the disc cutter spacing. The results show that the rock breaking by disc cutter undergoes the transformation characteristics of compaction, shearing, and tension failure modes, and the failure process of the rock mass is the joint action of tension and shear. In the whole process of rock breaking, the disc cutter has the phenomenon of repeated loading-unloading alternation and leaping rock breaking; after the penetration of the disc cutter reached 9.0 mm, penetration creaks begin to appear on the surface of the rock mass; the penetration was obviously reduced with the increase of confining pressure, and it is mainly the penetration cracks on the surface; after the disc cutter spacing reaches 100.0 mm, there is no penetration crack between the two disc cutters. The research conclusion can provide a reference for the disc cutter optimization design.

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28

Zhang, Jinliang, Yongchang Li, Yuansheng Zhang, Fengwei Yang, Chao Liang, and Shunhui Tan. "Using a high-pressure water jet-assisted tunnel boring machine to break rock." Advances in Mechanical Engineering 12, no. 10 (October 2020): 168781402096229. http://dx.doi.org/10.1177/1687814020962290.

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The concept of tunnel boring machine (TBM) disc cutter rock breaking coupled with high-pressure water jets has been proposed to overcome the difficulties that occur when TBMs encounter extremely hard rocks. Thus, to meet actual engineering requirements for the TBM construction of tunnels as part of the Wan’anxi water diversion project in Longyan City (Fujian Province, China), experiments were conducted on high-pressure water jet-assisted TBM disc cutter rock breaking. By varying kerf depth and width under different water jet parameters and performing disc cutter rock breaking tests on rock surfaces with no kerf, single kerf, and double kerfs, the effects of different kerf depths on the disc cutter rock breaking process, load, and efficiency were examined. The test results showed that high-pressure water jets can generate the regular kerfs required for the coupled disc cutter rock breaking of granite. Employing the coupled rock breaking method also resulted in a decrease in specific energy and an approximately 40% decrease in the normal force of the disc cutter, thereby significantly improving rock breaking efficiency. These results provide key technical parameters for the design and manufacture of high-pressure water jet-assisted rock-breaking TBMs and serves as a reference for similar processes.

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29

Zhang, Jian Zhong, Xin Wang, and Yue Zhang. "Study on Boring Small Hole of Stainless Steel Dryly by Ultrasonic Vibration Double Cutter." Advanced Materials Research 490-495 (March 2012): 1551–54. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.1551.

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It has been one of the difficulties that high-precision small hole on stainless steel is machined. The supersonic vibration boring acoustic system is installed in the lathe. The supersonic wave energy applies to tool to create pulse power on the cutting process. The separation vibration cutting is achieved by the pulse force. The comparative tests on boring surface quality are carried. The quality of surface machined by this method is compared to that by grinding. This cutting is the green cutting. The boring process system is stability. The cutting force is greatly reduced. The cutting temperature is at room temperature. The tool life is greatly increased. Surface quality and shape precision is greatly improved. The regulations of the ultrasonic vibration boring dry cutting of stainless steel are also summarized. The test results show that the ultrasonic vibration boring by double cutter is of very superior cutting mechanism and is a high-precision thin - long deep - hole machining of stainless steel materials, efficient cutting methods.

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30

Wang, Gaofeng, Ting Ren, and Gaolei Zhu. "The Influence of Confining Stresses on Rock Fragmentation, Thrust Force, and Penetration Energy in Sandstone Indentation Tests Using Disc Cutters." Advances in Civil Engineering 2021 (March 31, 2021): 1–13. http://dx.doi.org/10.1155/2021/5541538.

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Hard rock Tunnel Boring Machines (TBMs) engaging disc cutters as cutting tools have been employed in considerable underground coal mines to accommodate the requirement of more stone drivage as operations are going deeper. This study conducted a set of disc cutter indentation tests to explore the influence of confining stresses on rock fragmentation, thrust force, and penetration energy on sandstone, which is commonly encountered in underground coal mines. The test results show that there exists a critical confining stress, under which the maximum thrust force and penetration energy keep increasing with confining stress mounting while the maximum thrust force and penetration energy will decrease or flatten if it is surpassed. By combining with previous studies and comparing the critical confining stress values to the rock mechanical properties’ values, the critical value is most likely to be of cohesion. For subsurface rock fragmentation, the Constant Cross Section (CCS) disc cutter indentation has denser cracks and their orientations are more lateral than those under the V shape one; the V shape disc cutter indentation is less sensitive to confining stresses, with no notable increase of crack number and crack reorientation with increasing confinement. Thus, the CCS disc cutter is more favorable than the V shape one from the perspective of rock fragmentation under confining stresses.

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31

Mohamed Abbas, Adel Taha. "Enhancement of the Capabilities of CNC Machines via the Addition of a New Counter boring Cycle with a Milling Cutter." Mechanical Engineering Research 5, no. 2 (October 24, 2015): 45. http://dx.doi.org/10.5539/mer.v5n2p45.

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<p class="1Body">The operations of the machine, such as milling or drilling are the processes of shape transformation in which the metal is removed from the material stock to generate a part. The contact amongst the work piece and the generating tool creates substantial force. The study intends to examine and analyze different techniques of the model-based procedure control. Moreover, this research also aims at assessing a feature based approach, i.e., CNC approach. The program of CNC consists of a combination of machine specific instructions and machine specific codes. After reviewing the manuals of all modern CNC units from the different manufacturers, no efficient cycle was found for boring and counter-boring holes using a milling cutter. This research encapsulates the an investigation for the development of general programming algorithm, which is applied for boring or counter-boring many holes of different diameters using only one standard milling cutter. This algorithm has been integrated to produce a user-defined cycle (G888) and a subroutine for boring or counter-boring holes to achieve specific counter-bore diameters with accurate tolerance and good surface finishing. This programming algorithm can be equipped with our user-defined cycle (G881) to enable the machining of many counter-bore holes lying in a straight line (row/column/diagonal) or holes lying in regular or inclined matrix form. The algorithm can also be equipped with the presented user-defined cycle (G890) to machine counter-bore holes that form a circular pattern.</p>

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32

Entacher, M., G. Winter, T. Bumberger, K. Decker, I. Godor, and R. Galler. "Cutter force measurement on tunnel boring machines – System design." Tunnelling and Underground Space Technology 31 (September 2012): 97–106. http://dx.doi.org/10.1016/j.tust.2012.04.011.

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33

Song, Kanglei, Bolong Liu, and Haiqing Yang. "Experimental Study on the Evolution of Argillization of Mudstone and Cutter Wear during the TBM Tunnelling." Shock and Vibration 2021 (October 22, 2021): 1–14. http://dx.doi.org/10.1155/2021/7227194.

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Argillization is a process in which clay-bearing rocks disintegrate into the clay under the action of high temperature, pressure, and water. When tunnel boring machines (TBMs) excavate in the mudstone, argillization takes place, causing the clogging of the TBM cutterhead. As a result, the penetration rate drops gradually. Abnormal wear might occur. To investigate the evolution of argillization of mudstone and cutter wear during the TBM tunnelling, a series of rotary indentation tests were carried out on the self-designed experimental bench for different loading times. During the test, the temperature and penetration depth of disc cutters were measured in real time. After loading, microstructures of cutting grooves, slacking mudstone, and worn cutter ring were observed by stereomicroscope. Consequently, the evolution of argillization in mudstone and cutter wear were investigated. Experimental results indicate that the argillization process of mudstone by disc cutter can be divided into three stages: mechanical cutting stage, deterioration of mudstone and the formation of slacking mudstone stage, and adherence of slacking mudstone stage. Specifically, at mechanical cutting stage, the rock was cut by cutter directly, causing high frictional heat. Then the microstructure of mudstone was deteriorated due to the water-weakening mechanisms, temperature effect, and mechanical activation effect. Finally, the slacking mudstone was adhered to the disc cutter. Correspondingly, due to the argillization of mudstone, the disc cutter wear goes through the mechanical wear stage, argillization wear stage, and secondary wear stage in sequence. This investigation reveals the rock cutting mechanism of TBM considering the argillization of mudstone. Furthermore, it provides some references for design and operation of the TBM.

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34

Feng, Jin Chun, You De Wu, Chao Zhu, Lin Jian Yang, and Lei Li. "Research on the Efficient Cylinder Cutting on CNC Boring Machine Combining with Self-Made Welding Cutter." Applied Mechanics and Materials 34-35 (October 2010): 743–46. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.743.

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Because of the combination of self-made or common boring bar and CNC program, we machined two external cylinders used for tightening ring (φ500u6(+0.58/+0.54)×130mm ) of a vertical roller mill, and conquered the difficulty on machining high-precision cylindrical on the boring machine. This process improvement not only brings the machining advantage of CNC machine tools into full play, but also organically integrates conventional boring to turning methods, which can cause high machining efficiency. Since the special tooling is not needed and it’s easy to obtain materials from local sources, we can adjust the process in a large range. The implementation of this processing method is meaningful for the reference and promotion of processing such short cylinder by turning on the boring machine.

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35

Huo, Jun Zhou, Hai Feng Zhao, Xu Zhang, Wei Sun, and Yu Zhao. "Cutters Plane Layout Design of the Full-Face Rock Tunnel Boring Machine (TBM) Based on Multi-Spiral Layout Pattern." Advanced Materials Research 308-310 (August 2011): 1288–91. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.1288.

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The multi-spiral layout pattern has been widely adopted in practice during the layout design of the cutters. Considering the engineering technical requirements and the corresponding structure design requirements of the cutter head, this study formulates a nonlinear multi-objective mathematical model with multiple constraints for the cutters plane layout design based on a multi-spiral layout pattern. And then a genetic algorithm is employed to solve a cutters’ multi-spiral layout problem. An instance of the cutters’ plane layout design was solved by the proposed methods using a multi-spiral layout pattern. Experimental results showed the effectiveness of the method of combining the mathematical model with the algorithms, and the pros and cons of the multi-spiral layout pattern.

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36

Peng, H., Jiang Ping Wang, and Ze Fu Bao. "Experiment and Analysis on Near-Dry Cutting System in Titanium Alloy Deep-Hole Drilling." Key Engineering Materials 392-394 (October 2008): 229–33. http://dx.doi.org/10.4028/www.scientific.net/kem.392-394.229.

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This paper depicts a boring and trepanning association (BTA) deep-hole drilling system with near-dry cutting technique. The cutting tests are carried out in view of the machining performances under the condition of applying the compressed air and atomized cutting fluid for drilling deep holes on titanium alloy which is difficult to cut. Several cutter materials have been utilized in the tests. The reasonable material of the deep-hole drilling cutter has been determined by analyzing the cutting force, the cutter wear and the surface finish. Environmental pollution decreases owing to little cutting fluid consumption in near-dry cutting system.

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37

Shashurin, Alexander, Marat Goguadze, and Anna Lubianchenko. "EXPERIMENTAL STUDIES ON THE NOISE AND VIBRATION OF A SPECIAL BORING MACHINE DUE TO FORMATION OF THE OPERATOR´S WORKPLACE SOUND FIELD." Akustika 34 (November 1, 2019): 100–103. http://dx.doi.org/10.36336/akustika201934100.

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The purpose of this study is to measure the octave sound pressure levels and vibrations of a boring machine. A theoretical analysis of the sound pressure levels near the boring machine is performed. The measurement results are given. It was found that the workplace sound pressure levels exceed the sanitary standards, which suggests that the excessive noise levels are due to the exposure to the cutter sound radiation and the axis being machined.

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38

Jiang, Xing Yu, Chao Gao, Wei Xian Gao, Peng Cheng Su, and Hai Feng Zhao. "A New Integrated Performance Forecasting Model of TBM." Key Engineering Materials 693 (May 2016): 439–44. http://dx.doi.org/10.4028/www.scientific.net/kem.693.439.

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To realize accurate prediction of disk cutter performance and determine the crucial parameters in the design process of TBM (Full face tunneling boring machine), a new performance forecasting method of the circular blade cutter is presented, which integrates the parameters of breaking rock such as rock, disc cutter and construction. Furthermore, the second derivation in the process of breaking rock is considered, a new comprehensive performance forecasting model of the circular blade cutter is established based on the Coulomb-Mohr failure criterion. On the basis, the existed performance forecasting models of disc cutter such as Liner Cutting and CSM, and the performance forecasting model of disc cutter presented this paper are analyzed and calculated, according to Colorado linear cutting experiment. The calculation results indicate the prediction accuracy of the performance forecasting model presented in this paper is greatly improved, comparing with the existed models (such as CSM, linear cutting). Finally, the influences of the parameters (rock, disc cutter and construction) are analyzed, which provides for the overall design of TBM cutter and construction with some scientific basis.

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39

Yufkin, Yu G., and N. N. Vesnushkina. "DYNAMIC MODEL OF A BORING TOOL WITH FLOATING CUTTER BLOCKS." Mordovia University Bulletin 25, no. 1 (April 2, 2015): 101–4. http://dx.doi.org/10.15507/vmu.025.201501.101.

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40

Ling, Jingxiu, Long Cheng, Xin Tong, and Zhihong Wu. "Research on rock breaking mechanism and load characteristics of TBM cutter based on discrete element method." Advances in Mechanical Engineering 13, no. 2 (February 2021): 168781402199883. http://dx.doi.org/10.1177/1687814021998831.

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Tunnel boring machine (TBM) is a large-scale tunnel engineering equipment, which has unparalleled advantages in safety and work efficiency. The cutter is subjected to complex and variable random impact loads, resulting in damage to bearings, cutter rings, and cutter shafts. Therefore, based on the discrete element simulation platform and experiment, this paper established the cutter rock simulation model based on the experimental data, and analyzed the rock breaking process, cutter load magnitude, and variation law. The research results show that when the cutter pole diameter decreases from 200 mm, 100 mm, and 0 mm in sequence, the rolling force increases accordingly, and the maximum increase of the rolling force is 56%. Meanwhile the lateral force decreases and the maximum average decrease value is 26%. Moreover, the rolling force showed a downward trend with the increase of the cutter spacing. When the cutter spacing is increased from 80 mm to 120 mm, the average rolling force decreases by 51%, and the maximum value rises slightly, increasing by 2%. And, the lateral force tends to increase, with an increase of 17% and the maximum lateral force value increase was 29%. The results can provide load input reference for TBM cutter layout, cutterhead structure design, and performance evaluation.

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41

Afradi, Alireza, Arash Ebrahimabadi, and Tahereh Hallajian. "Prediction of the number of consumed disc cutters of tunnel boring machine using intelligent methods." Mining of Mineral Deposits 15, no. 4 (December 2021): 68–74. http://dx.doi.org/10.33271/mining15.04.068.

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Purpose. Disc cutters are the main cutting tools for the Tunnel Boring Machines (TBMs). Prediction of the number of consumed disc cutters of TBMs is one of the most significant factors in the tunneling projects. Choosing the right model for predicting the number of consumed disc cutters in mechanized tunneling projects has been the most important mechanized tunneling topics in recent years. Methods. In this research, the prediction of the number of consumed disc cutters considering machine and ground conditions such as Power (KW), Revolutions per minute (RPM) (Cycle/Min), Thrust per Cutter (KN), Geological Strength Index (GSI) in the Sabzkooh water conveyance tunnel has been conducted by multiple linear regression analysis and multiple nonlinear regression, Gene Expression Programming (GEP) method and Support Vector Machine (SVM) approaches. Findings. Results showed that the number of consumed disc cutters for linear regression method is R2 = 0.95 and RMSE = 0.83, nonlinear regression method is – R2 = 0.95 and RMSE = 0.84, Gene Expression Programming (GEP) method is – R2 = 0.94 and RMSE = 0.95, Support Vector Machine (SVM) method is – R2 = 0.98 and RMSE = 0.45. Originality. During the analyses, in order to evaluate the accuracy and efficiency of predictive models, the coefficient of determination (R2) and root mean square error (RMSE) have been used. Practical implications. Results demonstrated that all four methods are effective and have high accuracy but the method of support vector machine has a special superiority over other methods.

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42

Kryvyi, P., V. Krupa, V. Kobelnyk, and Ya Kosiv. "Substantiation of parameters for three-cutter boring head with allowance and feed distribution and asymmetric cutter position." Scientific journal of the Ternopil national technical university 96, no. 4 (2019): 57–69. http://dx.doi.org/10.33108/visnyk_tntu2019.04.057.

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43

Wang, Zhao Qian, Tian Biao Yu, Ye Zou, Chang Xin Wang, Hai Feng Zhao, and Wan Shan Wang. "Fatigue Reliability and Optimal Design Research of TBM Cutter." Advanced Materials Research 328-330 (September 2011): 18–21. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.18.

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Tools of tunnel boring machine CAD models have been built by CAD software, it is analyzed static characteristics and fatigue characteristics by finite element analysis and obtaining the displacement in the poor stiffness conditions. Improving its structure to strengthen stiffness and fatigue life by the calculate result. The final result shows that the structure can satisfy its rigid command and can fit the soil conditions above 5%-10%. Damage frequency of tools is greatly deduced. It provides a theoretical basis for the actual design and product manufacturing.

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44

Okubo, S., K. Fukui, and W. Chen. "Size and Shape of TBM Debris Estimated by the Nishimatsu's Cutting- Resistance Equation." Open Civil Engineering Journal 4, no. 1 (September 28, 2010): 88–95. http://dx.doi.org/10.2174/1874149501004010088.

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Information concerning the size and shape of tunnel boring machine (TBM) debris is essential for designing efficient loading, hauling and dumping systems for TBM excavation. It is also very important in deciding how to recycle the TBM debris. However, only very limited information is available at present, and theoretical or calculation methods to estimate the size and shape are still open to discussion. In this paper, the size and shape of TBM debris are estimated by the well-known Nishimatsu's equation that is usually applied to roadheaders or shield-type machines with chisel bits. In this study, the equation was applied to the case of TBM excavation with disc cutters in which the shear failure or plane extends from a new groove to an adjacent pre-existing one. The estimated size and shape of TBM debris were found to be consistent with the measured results. Side forces applied to a disc cutter and the resultant stress on the cutter were considered. The maximum debris size encountered in tunnel excavation was also discussed assuming that it followed the Gumbel distribution. The results suggest that the proposed approach based on Nishimatsu's equation shows potential for future study.

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45

Entacher, M., G. Winter, and R. Galler. "Cutter force measurement on tunnel boring machines – Implementation at Koralm tunnel." Tunnelling and Underground Space Technology 38 (September 2013): 487–96. http://dx.doi.org/10.1016/j.tust.2013.08.010.

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46

Wang, Z. N., Q. Y. Wang, B. B. Hu, C. Wei, and Q. N. Wu. "The analysis of TBM cutter stress under different construction environment." IOP Conference Series: Materials Science and Engineering 1242, no. 1 (April 1, 2022): 012038. http://dx.doi.org/10.1088/1757-899x/1242/1/012038.

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Abstract As the country’s underground tunnels continue to expand, underground construction technology has been developed rapidly. In order to meet the development needs of construction technology in China, Tunnel Boring Machine (TBM) has made great progress due to its own advantages. In this paper, feed amount of disc cutter on rock crushing under complex working conditions is considered. The mechanism of rock fragmentation is analyzed. The force between disc cutter and the rock is studied. The accuracy of the model is verified by setting up a TBM rock fragmentation experiment platform. This study provides technical support for TBM construction parameters under different working conditions.

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47

Lin, Laikuang, Yimin Xia, and Dun Wu. "Multiobjective Optimization Design for Structural Parameters of TBM Disc Cutter Rings Based on FAHP and SAMPGA." Advances in Civil Engineering 2019 (September 12, 2019): 1–13. http://dx.doi.org/10.1155/2019/8438639.

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As a key component of tunnel boring machines (TBMs), the disc cutter ring and its structural parameters are closely related to the TBM tunneling quality. Literature review shows that investigations on optimization design methods for cutter ring structure are seriously insufficient. Therefore, in this paper, a multiobjective optimization design model of structural parameters for disc cutter rings is developed based on the complex geological conditions and the corresponding cutter ring structure design requirements. The rock breaking capability, energy consumption, load-bearing capability, wear life, and wear uniformity of disc cutter are selected as the objectives, and the geometric structure of cutter rings, ultimate load-bearing capability, and cutterhead drive performance are determined as constraints. According to the characteristics of this model, a self-adaptive multipopulation genetic algorithm (SAMPGA) is utilized to solve the optimization problem, and the Fuzzy analytical hierarchy process (FAHP) is employed to calculate weight coefficients for multiple objectives. Finally, the applicability of the proposed method is demonstrated through a case study in a TBM project. The results indicated that the rock breaking performance and service life of the disc cutter are improved after optimization by using the proposed method. The utilization of SAMPGA effectively solves the premature local convergence problems during optimization. The geological adaptability should be considered in the cutter ring structure design, which can be realized by using the proposed method based on the suitable weight coefficients.

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48

Schultz, William C. "Animation with Power Point: A Fog Cutter." Journal of Educational Technology Systems 25, no. 2 (December 1996): 141–60. http://dx.doi.org/10.2190/c2hj-qrkj-2f6p-bcbt.

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This article demonstrates how to take a traditional approach to the development of a lesson in a management science course and replace it with an approach that takes advantage of course technology available today. The traditional approach contains elements that are hard to present to students. The new approach takes advantage of presentation software. Examples, selected from presentations for a management science course at Buffalo State College, feature use of animation techniques that were developed with Power Point. Use of this animation technique in Power Point presentations offers a very sharp tool for cutting through the often foggy, dull, and at times even boring details of the mathematical analysis associated with management science and decision theory. Animation offers a dramatic and exciting contrast to the alternative of scanning through several pages of printed graphs or tables in a textbook.

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49

Tolmacheva, Tatyana A., Vadim V. Kuts, and Yuliya A. Malneva. "Improving Productivity of Misaligned Boring of Hydraulic Cylinder Holes with a Rotating Cutter Block Based on Computer Simulation Results." Key Engineering Materials 910 (February 15, 2022): 150–55. http://dx.doi.org/10.4028/p-s051f1.

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The analysis of existing processing methods was carried out. A series of virtual experiments was performed; based on their results dependences of the height of residual ridges, the temperature on the workpiece surface and the temperature in the cutting zone on the parameters of the processing mode when boring internal holes with a rotating cutter block were constructed based on the results of virtual computer simulation. An optimization model of the boring process was built. The objective function was received. Within the optimization model framework, solutions were obtained that allow, at the highest value of axial feed, to ensure the required surface quality and avoid changes in the physical and mechanical properties of the material.

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50

Li, Huiyun, and Erxia Du. "Simulation of rock fragmentation induced by a tunnel boring machine disk cutter." Advances in Mechanical Engineering 8, no. 6 (June 2016): 168781401665155. http://dx.doi.org/10.1177/1687814016651557.

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