Rock Cutting Depth Model Based on Kinetic Energy of Abrasive Waterjet

2015 ◽  
Vol 49 (3) ◽  
pp. 1059-1072 ◽  
Author(s):  
Tae-Min Oh ◽  
Gye-Chun Cho
Keyword(s):  
Kinetic Energy ◽  
Rock Cutting ◽  
Abrasive Waterjet ◽  
Cutting Depth ◽  
Model Based

scholarly journals Effects of Focus Geometry on the Hard Rock-Cutting Performance of an Abrasive Waterjet

2020 ◽  
Vol 2020 ◽  
pp. 1-13 ◽  
Author(s):  
Yohan Cha ◽  
Tae-Min Oh ◽  
Gye-Chun Cho
Keyword(s):  
Momentum Transfer ◽  
Hard Rock ◽  
Empirical Relationship ◽  
Abrasive Particle ◽  
Rock Cutting ◽  
Maximum Energy ◽  
Cutting Performance ◽  
Granitic Rocks ◽  
Abrasive Waterjet ◽  
Cutting Depth

Abrasive waterjets are being increasingly used in civil engineering for rock and concrete cutting, particularly for the demolition or repair of old structures. The energy of an abrasive waterjet is primarily provided by the accelerated abrasive. The momentum transfer during mixing and acceleration determines the abrasive velocity, which affects the cutting performance. Meanwhile, the geometry of the focus at which mixing occurs influences the momentum transfer efficiency. In this study, the effects of the focus geometry on the optimum abrasive flow rate (AFR) and momentum transfer characteristics in hard rock cutting were investigated. Experiments were conducted using granite specimens to test the AFR under different focus geometry conditions such as diameter and length. The results show that the focus geometry significantly affects the maximum cutting depth and optimum AFR. The maximum cutting energy was analyzed based on the cutting efficiency of a single abrasive particle. In addition, the momentum transfer parameter (MTP) was evaluated from the empirical relationship between the maximum energy and the cutting depth for granitic rocks. Accordingly, a model for estimating the MTP based on the AFR was developed. It is expected that the results of this study can be employed for the optimization of waterjet rock cutting.

Nano-Process of SiC Ceramics by Molecular Simulation

2011 ◽  
Vol 189-193 ◽  
pp. 3097-3102 ◽  
Author(s):  
Guo Zhi Liu ◽  
Ke Zhang ◽  
Yu Lan Tang ◽  
Hong Sun ◽  
Hai Yan Gao
Keyword(s):  
Kinetic Energy ◽  
Molecular Simulation ◽  
Molecular Model ◽  
Cutting Speed ◽  
Chemical Properties ◽  
Cutting Depth ◽  
Sic Ceramics ◽  
Ultra Precision ◽  
Physical And Chemical ◽  
And Chemical Properties

SiC ceramics have been widely used in a variety of areas due to the excellent physical and chemical properties. However, the process of SiC ceramics is difficult and high-cost, molecular simulation is an effective and feasible method to study the nano-process of SiC ceramics. In this paper, a molecular model is presented to simulate the stress and energy in the nano-cutting of SiC ceramics. The influences of the cutting depth and cutting speed on the kinetic energy and potential are analyzed. The results show that potential energy increases with the decrease of the cutting depth. Kinetic energy increases with the increase of the cutting speed. The results are very helpful for improvement the level of ultra-precision processing and nano-processing of brittle ceramics.

A kinetic energy model based on machine vision for recognition of aggressive behaviours among group-housed pigs

2018 ◽  
Vol 218 ◽  
pp. 70-78 ◽  
Author(s):  
Chen Chen ◽  
Weixing Zhu ◽  
Yizheng Guo ◽  
Changhua Ma ◽  
Weijia Huang ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Machine Vision ◽  
Energy Model ◽  
Model Based ◽  
Aggressive Behaviours

scholarly journals Influence of Traverse Velocity and Pump Pressure on the Efficiency of Abrasive Waterjet for Rock Cutting

2017 ◽  
Vol 40 (3) ◽  
pp. 255-262 ◽  
Author(s):  
Paola Bruno Arab ◽  
Tarcísio Barreto Celestino
Keyword(s):  
Rock Cutting ◽  
Abrasive Waterjet ◽  
Pump Pressure

Effect of Abrasive Feed Rate on Rock Cutting Performance of Abrasive Waterjet

2019 ◽  
Vol 52 (9) ◽  
pp. 3431-3442 ◽  
Author(s):  
Tae-Min Oh ◽  
Gun-Wook Joo ◽  
Gye-Chun Cho
Keyword(s):  
Feed Rate ◽  
Rock Cutting ◽  
Cutting Performance ◽  
Abrasive Waterjet

Characteristic Analysis of Metal Trough Faces Cut by Pre-Mixed Abrasive Waterjet

2011 ◽  
Vol 63-64 ◽  
pp. 740-744
Author(s):  
Bai Sheng Nie ◽  
Ming Zhang ◽  
Jun Qing Meng ◽  
Hui Wang ◽  
Ru Ming Zhang
Keyword(s):  
Formation Mechanism ◽  
Sem Analysis ◽  
Abrasive Waterjet ◽  
Characteristic Analysis ◽  
Cutting Mechanism ◽  
Cutting Efficiency ◽  
Cutting Depth ◽  
Topographic Characteristics ◽  
Awj Cutting ◽  
The Relationship

In order to improve the cutting efficiency of abrasive waterjet (AWJ), the relationship between pre-mixed AWJ cutting depth and pressure was experimentally studied. Then, through analysis of the cutting results, the topographic characteristics and formation mechanism of the cut trough faces were investigated. Moreover, through comparing the effects of different jet pressures on the topographic characteristics of AWJ cut trough faces and the SEM analysis of the cut trough faces at different pressures and depths, the effects of pre-mixed AWJ cutting mechanism on the characteristics of cut trough faces were investigated, and the characteristics of the trough faces of metals cut by pre-mixed AWJ were analyzed.

scholarly journals Stress Distribution and Fluctuation Cycle on the Rack Face of the Rock Cutting Tool

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Xiaofeng Yang ◽  
Yongchao Xue ◽  
Jiaheng Zhou
Keyword(s):  
Cutting Tool ◽  
Cutting Speed ◽  
Local Stress ◽  
Rock Cutting ◽  
Impact Factors ◽  
Cycle Period ◽  
Cutting Depth ◽  
Stress Fluctuation ◽  
Dynamic Simulation Model ◽  
Back Angle

The distribution of the stress field on the rack face has significant impacts on the performance and service life of the rock cutting tool. A dynamic simulation model of the stress on the rock cutting tool is established by finite element code Abaqus, and the distribution of local stress on the rack face and its impact factors are studied. It is concluded that the local stress on the rack face of the rock cutting tool shows obvious periodical fluctuation characteristics, and the fluctuation cycle of each point on the tool remains unchanged under the same cutting conditions. The stress fluctuation cycle period decreases with the increase of cutting speed inversely. The cutting depth and the back angle of the cutting tool have no obvious impact on the stress fluctuation period. However, the cutting depth and the back angle have obvious impacts on the average stress distributions of each point on the rack face of the tool. That is, the increase of back angle and cutting depth could cause the maximum stress point of the rack face to move upward to the tool tip.

scholarly journals Numerical Investigation of the Rock Cutting Performance of a Circular Sawblade

2020 ◽  
Vol 2020 ◽  
pp. 1-18
Author(s):  
Zhiwen Wang ◽  
Qingliang Zeng ◽  
Zhenguo Lu ◽  
Zhihai Liu ◽  
Xu Li
Keyword(s):  
Cutting Force ◽  
Great Influence ◽  
Cutting Parameters ◽  
Simulation Method ◽  
Rock Cutting ◽  
Rock Breaking ◽  
Feed Speed ◽  
Specific Cutting Energy ◽  
Cutting Depth ◽  
Cutting Energy

The rock cutting process with a circular sawblade and the rock breaking mechanism of rock are studied with a numerical simulation method in this paper. The influence of cutting parameters of the circular sawblade on cutting force, rock damage, and specific cutting energy in the process of circular sawblade cutting rock is researched. The cutting force increases with the feed speed and an increase in cutting depth and decline in rotation speed. Cutting rock with double circular sawblades can reduce cutting force. However, the specific cutting energy declines with the increase in cutting depth and the decline in the distance between the double circular sawblades. Cutting parameters have a great influence on the damage range of rock. The research results can be applied to rock processing with a circular sawblade.

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