scholarly journals Discrete Element Simulation of Conical Pick’s Coal Cutting Process under Different Cutting Parameters

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Jinxia Liu ◽  
Chao Ma ◽  
Qingliang Zeng ◽  
Kuidong Gao
Keyword(s):  
Angular Velocity ◽  
Cutting Force ◽  
Cutting Parameters ◽  
Discrete Element ◽  
Cutting Process ◽  
Conical Pick ◽  
Force Fluctuation ◽  
Installation Angle ◽  
Coal Cutting ◽  
Coal Particles

To explore how the cutting parameters affect the conical pick’s cutting force in coal cutting process, some simulation tests were carried with EDEM based on analysis of coal cutting process of conical pick and micro mechanical characteristic of coal particles. In this paper, traction speed, drum angular velocity, and installation angle of conical pick were considered as the main coal cutting parameters. The discrete element simulations were conducted under 7 sets of various cutting parameters, which were determined in the range of empirical parameters. From the results of the simulation tests, it can be concluded that the fragmentation of coal particles appears in a compacted, squeezed, and crumbling state in coal cutting process; the traction speed has the greatest impact on the conical pick’s cutting force and cutting force fluctuation and the influence of drum angular velocity and installation angle reduce in turn; the force and force fluctuation tend to decrease and obviously increase, respectively, with the increase of drum angular velocity and traction speed; and they will reach the minimum when the pick’s installation angle is 45° under certain traction speed and drum angular velocity.

scholarly journals Numerical Simulation of Conical Pick Cutting Arc Rock Plate Fracture Based on ANSYS/LS-DYNA

2020 ◽  
Vol 2020 ◽  
pp. 1-16 ◽  
Author(s):  
Zhiwen Wang ◽  
Qingliang Zeng ◽  
Zhenguo Lu ◽  
Lirong Wan ◽  
Xin Zhang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Cutting Force ◽  
Structural Parameters ◽  
Cutting Parameters ◽  
Rock Breaking ◽  
Central Axis ◽  
Plate Height ◽  
Conical Pick ◽  
Cutting Angle ◽  
Cutting Point

The new method of rock breaking based on the combination of circular sawblade and conical pick was proposed to improve the effectiveness of hard rock breaking. The numerical simulation method was applied to research the conical pick cutting arc rock plate by ANSYS/LS-DYNA. The conical pick cutting arc rock plate numerical simulation model was established to research the influence of arc rock plate structural parameters and cutting parameters on cracks formation and propagation of the arc rock plate and the cutting force in the process of conical pick cutting arc rock plate. The amount of cracks is positively correlated with arc rock plate thickness, the cutting speed, and distance of cutting point to arc rock plate central axis and negatively correlated with the cutting angle. The mean peak cutting force is positively correlated with the thickness of arc rock plate and the distance of cutting point to arc rock plate central axis; however, it is negatively correlated with the arc rock plate height and width and cutting angle of conical pick. The simulation results can be used to predict the conical pick work performance with various cutting parameters and structural parameters.

Finite Element Simulation on High Speed Cutting of Hardened 45 Steel Based on ABAQUS

2013 ◽  
Vol 579-580 ◽  
pp. 202-207
Author(s):  
Guo He Li ◽  
Hou Jun Qi ◽  
Bing Yan
Keyword(s):  
Finite Element ◽  
Cutting Force ◽  
Finite Element Simulation ◽  
High Speed ◽  
Cutting Temperature ◽  
Cutting Parameters ◽  
Cutting Process ◽  
High Speed Cutting ◽  
Geometry Model ◽  
Element Simulation

For the high speed cutting process of hardened 45 steel (45HRC), a finite element simulation of cutting deformation, cutting force and cutting temperature is finished with the large general finite element software ABAQUS. Through the building of geometry model, material model and heat conduction model, also the determination of boundary conditions, separation rule and friction condition, a thermal mechanical coupling finite element model of high speed cutting for hardened 45 steel is built. The serrated chip, cutting force and cutting temperature can be predicted. The comparison of experiment and simulation shows the validity of the model. The influence of cutting parameters on cutting process is investigated by the simulation under different cutting depthes and rake angles. The results show that as the increase of rake angle, the segment degree, cutting force and cutting temperature decrease. But the segment degree, also the cutting force and cutting temperature increase with the increase of cutting depth. This study is useful for the selection of cutting parameters of hardened steel.

Physical Simulation of Cutting Process and Optimization of Cutting Parameters

2012 ◽  
Vol 522 ◽  
pp. 210-216
Author(s):  
Tian Biao Yu ◽  
Xue Wei Zhang ◽  
Jia Ying Pei ◽  
Wan Shan Wang
Keyword(s):  
Finite Element ◽  
High Temperature ◽  
Cutting Force ◽  
Finite Element Simulation ◽  
Physical Simulation ◽  
Cutting Parameters ◽  
Cutting Process ◽  
Finite Element Software ◽  
Element Simulation ◽  
Optimization Of Cutting Parameters

Based on metal cutting theory and the key technology of finite element simulation, this paper uses finite element software Deform to establish three-dimensional finite element simulation model and simulate cutting process. This paper uses the work piece material is IN718 high temperature alloys packaged in Deform, and analyzes the processing characteristics of high temperature, choosing the right tools and cutting dosages to simulate. Through the simulation we can get scraps forming process, the surface stress, strain, temperature and cutting force distribution of the workpiece and the tool. We can also get the change rule of cutting force and cutting temperature under the different cutting parameters. The simulation results provide the theoretical basis for the optimization of cutting parameter selection in production practice.

Analysis of the Influence of Cutting Parameters on Cutting Force Based on Cutting Process Simulation

2013 ◽  
Vol 710 ◽  
pp. 223-227
Author(s):  
Yan Cao ◽  
Hua Chen ◽  
Hai Xia Zhao
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Cutting Force ◽  
Process Simulation ◽  
Metal Cutting ◽  
Cutting Parameters ◽  
Cutting Process ◽  
Rigid Plastic ◽  
Simulation Parameters ◽  
Element Method

Based on the study on metal cutting theories and rigid-plastic finite element method, taking Sweden SECO lathe tool MDT as the researching object, the cutting force in cutting process is analyzed after a cutting process simulation model is constructed using finite element method. Different simulation parameters and cutting parameters are used to carry out analyses time after time. The dynamic changing curves of the cutting force in cutting process are obtained. Through the comparison of the cutting force in different cutting conditions, the influence of cutting parameters on the cutting force is summarized. The research can provide useful data for improvement of metal cutting technology and tool cutting performance.

scholarly journals EFFECT OF CUTTING SPEED IN THE TURNING PROCESS OF AISI 1045 STEEL ON CUTTING FORCE AND BUILT-UP EDGE (BUE) CHARACTERISTICS OF CARBIDE CUTTING TOOL

SINERGI ◽  
2020 ◽  
Vol 24 (3) ◽  
pp. 171
Author(s):  
Sobron Yamin Lubis ◽  
Sofyan Djamil ◽  
Yehezkiel Kurniawan Zebua
Keyword(s):  
Cutting Force ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Cutting Process ◽  
Depth Of Cut ◽  
Aisi 1045 Steel ◽  
1045 Steel

In the machining of metal cutting, cutting tools are the main things that must be considered. Using improper cutting parameters can cause damage to the cutting tool. The damage is Built-Up Edge (BUE). The situation is undesirable in the metal cutting process because it can interfere with machining, and the surface roughness value of the workpiece becomes higher. This study aimed to determine the effect of cutting speed on BUE that occurred and the cutting strength caused. Five cutting speed variants are used. Observation of the BUE process is done visually, whereas to determine the size of BUE using a digital microscope. If a cutting tool occurs BUE, then the cutting process is stopped, and measurements are made. This study uses variations in cutting speed consisting of cutting speed 141, 142, 148, 157, 163, and 169 m/min, and depth of cut 0.4 mm. From the results of the study were obtained that the biggest feeding force is at cutting speed 141 m/min at 347 N, and the largest cutting force value is 239 N with the dimension of BUE length: 1.56 mm, width: 1.35 mm, high: 0.56mm.

Predication of Rock Cutting Force of Conical Pick Based on RBF Neural Network

2014 ◽  
Vol 501-504 ◽  
pp. 92-95 ◽  
Author(s):  
Xiang Ping Tang ◽  
Duan Yi Wang
Keyword(s):  
Neural Network ◽  
Theoretical Model ◽  
Cutting Force ◽  
Rbf Neural Network ◽  
Theoretical Models ◽  
Operational Reliability ◽  
Cutting Process ◽  
Experimental Result ◽  
Conical Pick ◽  
Element Method

The mechanized level of coal mining work is developing rapidly, the roadheader and shearer are the most important equipments. The conical pick acts on coal or rock directly, and its design and selection play an important role in the operational reliability of these equipments. However, the cutting force is the basis to design and select conical pick [1, . At home and abroad, many researchers attempted to establish the theoretical models for calculating the peak cutting force of conical picks. Evans used the maximum tensile criterion to set up the theoretical model for conical pick, and the model was widely used in the design of roadheader, shearer and so on in Europe and America [. Goktan et al. developed the presented model based on Evans theoretical model, and they given the modified model [. Okan et al. adopted the finite element method and the discrete element method to simulate the rock or coal cutting process to predicate the cutting force [. As mentioned above, the theoretical model is easy to calculate the cutting force, but the results have big difference with the experimental result due to simplify the relations between the cutting force and parameters. The numerical method is difficult to predicate the cutting force accurately, because the influence of rock or coal constitutive model, element failure criterion and boundary condition on cutting process. Therefore, the RBF Neural Network for predicating the cutting force was established base on a large amount experimental data in this paper. The aim is to predicate the cutting force accurately and reliably, and provide some basis to design and select the concial pick.

scholarly journals Research on cutting performance and fatigue life of conical pick in cutting rock process

2021 ◽  
Vol 104 (4) ◽  
pp. 003685042110502
Author(s):  
Qingliang Zeng ◽  
Zhiwen Wang ◽  
Zhenguo Lu ◽  
Lirong Wan ◽  
Zhihai Liu ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Cutting Force ◽  
Cutting Speed ◽  
Simulation Models ◽  
Cutting Parameters ◽  
Rock Damage ◽  
Specific Cutting Energy ◽  
Conical Pick ◽  
Research Results ◽  
Cutting Energy

The conical pick is the most crucial tool of roadheader for breaking rock, establishing the conical pick cutting rock and conical pick fatigue life numerical simulation models to investigate the influence of cutting parameters on rock damage, average peak cutting force, specific cutting energy and the conical pick fatigue life. The research results indicate that the width and depth of rock damage increase with increasing cutting depth and cutting speed. The average peak cutting force and the specific cutting energy have the same changing tendency. The changing trend of conical pick fatigue life and conical pick stress is opposite relationship. The optimum cutting angle of the conical pick cutting rock is 45°. Applying the research results for guiding the optimization of the cutting parameters reduces the specific cutting energy and stress and improves the conical pick fatigue life.

Numerical Simulation of Conical Pick Cutting Coal and Rock Process Based on ABAQUS

2013 ◽  
Vol 385-386 ◽  
pp. 203-207
Author(s):  
Chun Sheng Liu ◽  
Yang Song ◽  
Chun Ping Ren
Keyword(s):  
Cutting Force ◽  
Pearson Correlation ◽  
Cone Angle ◽  
Lateral Force ◽  
Related Factors ◽  
Conical Pick ◽  
Installation Angle ◽  
Alternating Direction ◽  
Coal Rock ◽  
Simulation Results

Aimed at investigating efficient cutting method with a lower energy consumption, higher reliability and life, and researching the intrinsic relationships between ability of picks' breaking coal rock and related factors, this paper simulates the dynamic process of conical pick cutting coal rock by using ABAQUS/explicit, analyzes cutting load statistics, and evaluates the similarity of simulation results and test results quantitatively using Pearson correlation coefficient. The results indicate that the simulation results are in good agreement with the test and the theoretical results (the error is within 10%), the description of the variation law and influence degree of the cutting force, propelling and lateral force along with the pick cone angle and installation angle, the average gradient of three force variation, the ratio range of propelling force to cutting force (0.18~0.34) and variation tendency along with the installation angle and the cone angle. Positive or negative alternating direction of lateral force proves that cutting slots on both sides of coal rock existing non-simultaneous avalanche phenomenon in cutting process. The study provides the reference for the simulation of pick cutting and cutting mechanism broking coal and rock under considering the anisotropy of coal rock and beddings and joints.

Determination of cutting force of roll-formed section in shaped dies-knife guillotine

2020 ◽  
pp. 373-376
Author(s):  
S.V. Povorov ◽  
D.V. Egorov ◽  
D.S. Volgin
Keyword(s):  
Cutting Force ◽  
Cutting Process ◽  
Sheet Blank

The change in cutting force in the cutting process of roll-formed section in shaped dies-knife guillotine is studied. It is established that to calculate the cutting force in shaped guillotine, one can use formulas to determine the cutting force of sheet blank on conventional straight knives guillotine.

Sign in / Sign up

Export Citation Format

Share Document