Dynamic Analysis of the Diamond Saw Blade Cutting Granite Based on LS-DYNA

2011 ◽  
Vol 130-134 ◽  
pp. 955-958
Author(s):  
Min Zhao ◽  
Xi Ying Lang ◽  
Feng Lian Qi ◽  
Dong Liang Lei
Keyword(s):  
Cutting Force ◽  
Practical Significance ◽  
Small Range ◽  
Force Curve ◽  
Stress Strain ◽  
Fem Model ◽  
Diamond Saw ◽  
Blade Cutting ◽  
Saw Blade ◽  
Diamond Saw Blades

The process of cutting granite material is simulated with using analysis of LS-DYNA finite element. The stress, strain and cutting force of a diamond saw blade are analyzed when cutting granite materials. Then the stress-strain distribution and cutting force curve of the diamond saw blade can be got in the process of cutting granite materials and a conclusion of the change rule of the cutting force is also obtained. When the diamond saw blade just contacts the workpiece, the cutting force rises gradually and after entering the certain cutting depth, the cutting force fluctuates in a very small range. Through the simulation, the theory of FEM model to calculate granite materials cutting force is obtained. By changing the parameters of the diamond saw blades, the influence of all parameters on cutting force of diamond saw blade is analyzed .A diamond saw blade's structure is optimized, when the parameters of saw blades is suitably selected. The processing performance of a diamond saw blade is improved further, and the result has important practical significance to process the granite material.

Study on the damage of coal and rock with diamond saw blade cutting based on LS-DYNA

2017 ◽  
Vol 06 (04) ◽  
pp. 1750026 ◽  
Author(s):  
Qingliang Zeng ◽  
Zhiwen Wang ◽  
Lirong Wan ◽  
Xin Zhang ◽  
Zhenguo Lu
Keyword(s):  
Cutting Force ◽  
Axial Force ◽  
Rotational Speed ◽  
Cutting Speed ◽  
Rock Damage ◽  
Coal Rock ◽  
Diamond Saw ◽  
Saw Blade ◽  
Diamond Saw Blades ◽  
Cutting Speeds

To solve the problem of coal-rock damage during cutting coal and rock by diamond saw blade — the LS-DYNA diamond saw blade — coal and rock finite element model is established. According to the fracture mechanism of brittle materials, by studying a single diamond saw blade with different cutting speeds and revolution speeds along with double diamond saw blades with different spacing, cutting speeds and cutting speeds of coal-rock damage, axial force and force change, the numerical simulation resultant demonstrated the axial force, cutting force and rock damage decrease significantly with an increase in rotational speed. The force and damage increase with an increase in the cutting speed and a decrease in the distance of the diamond saw blade. The axial force linearly increases with rotational speed and cutting speed. The cutting force exponentially decreases with increasing rotational speed, and it increases with increasing feeding speed. The forces decrease linearly with the increasing distance of the diamond saw blades. The damage degree of rock increases as the distance and rotational speed increase, and it decreases as the cutting speed increases.

Effect of thermal modification temperature of spruce wood on cutting parameters during circular saw blade cutting

2021 ◽  
Vol 113 ◽  
pp. 30-35
Author(s):  
LUĎKA HLÁSKOVÁ ◽  
ZDENĚK KOPECKÝ ◽  
VÍT NOVÁK
Keyword(s):  
Cutting Force ◽  
Cutting Parameters ◽  
Cutting Resistance ◽  
Circular Saw ◽  
Spruce Wood ◽  
Heat Treated ◽  
Circular Saw Blade ◽  
Blade Cutting ◽  
Saw Blade ◽  
Increasing Temperature

Effect of thermal modification temperature of spruce wood on cutting parameters during circular saw blade cutting. The work examines the effect of temperature on energetical parameters (specific cutting resistance and cutting force) when cutting heat-treated wood of Norway spruce (Picea Abies) by a circular saw. The test samples were heat-treated at 160°C, 180°C, 200°C and 220°C. One sample was not heat treated and was used as a reference sample. In comparison with the theoretical assumptions, the influence of temperature on the cutting force and specific cutting resistance was confirmed. With increasing temperature of modification, the specific cutting resistance and cutting force decreased. The reduction of value of cutting force is related to changes in the chemical structure of the wood components, weight and density loss due to the increasing temperature of modification.

Reliability Analysis of the Diamond Saw Blades Based on ANSYS

2011 ◽  
Vol 130-134 ◽  
pp. 887-890
Author(s):  
Yun Feng Zhang ◽  
Zhen Nan Qi ◽  
Xi Ying Lang ◽  
Min Zhao
Keyword(s):  
Equivalent Stress ◽  
Stress Sensitivity ◽  
Milling Process ◽  
Cumulative Distribution ◽  
Structure Reliability ◽  
Maximum Equivalent Stress ◽  
Diamond Saw ◽  
Saw Blade ◽  
Diamond Saw Blades ◽  
The Impact

The structure reliability of the diamond saw blade in milling process is studied. With probability design features of ANSYS, take the flange diameter ,thickness, diameter of the diamond saw blade and load suffered in the milling process as input variables, and take the maximum equivalent stress of dangerous parts of the diamond saw blades stress as output variable. The diamond saw blade structure reliability is analysed using Monte Carlo method and the maximum equivalent stress value cumulative distribution and dangerous parts of various parameters on the distribution of the maximum equivalent stress sensitivity under the impact of the load are got. The result provides a theoretical basis for improving the parameters of diamond saw blade and has the significant practical and theoretical value for the stone processing theory and diamond saw blade study.

scholarly journals Investigation of Cutting Performance of a Circular Saw Blade Based on ANSYS/LS-DYNA

2021 ◽  
Vol 67 (12) ◽  
pp. 649-665
Author(s):  
Zhiwen Wang ◽  
Qingliang Zeng ◽  
Zhenguo Lu ◽  
Lirong Wan ◽  
Xin Zhang ◽  
...  
Keyword(s):  
Cutting Force ◽  
Rotation Speed ◽  
Cutting Parameters ◽  
Cutting Performance ◽  
Feed Speed ◽  
Research Results ◽  
Circular Saw ◽  
Circular Saw Blade ◽  
Blade Cutting ◽  
Saw Blade

The circular saw blade is widely applied in rock processing; its cutting performance significantly impacts rock processing. Therefore, the numerical simulation model of rock cutting with the flexible circular saw blade has been established to investigate the effects of cutting parameters on the stress and cutting force of circular saw blade, and the damage and stress of rock in the circular saw blade cutting into rock vertically at constant feed speed and rotation speed. The research results indicate that the stress of the saw blade and rock rises with the increase of feed speed and rotation speed of the saw blade. Furthermore, the rock damage and the cutting force of the circular saw blade increase with the increasing feed speed and decrease with increasing rotation speed. The circular saw blade cutting force, vertical force, and horizontal force increase with the rising distance between the double circular saw blade. However, the axial force decreases. The research results of cutting hard rock with the flexible circular saw blade can aid in the optimization of cutting parameters and improve cutting efficiency.

scholarly journals Fabrication of Nano-Ce and Application of Nano-Ce in Fe Matrix Composites

2010 ◽  
Vol 2010 ◽  
pp. 1-5 ◽  
Author(s):  
Wang Tiebao ◽  
Cui Chunxiang ◽  
Wang Xiaodong ◽  
Li Guobin
Keyword(s):  
Thermodynamic Analysis ◽  
Matrix Composite ◽  
Fracture Analysis ◽  
Matrix Composites ◽  
Sintering Process ◽  
Acting Mechanism ◽  
Suitable Amount ◽  
Diamond Saw ◽  
Saw Blade ◽  
Diamond Saw Blades

It is expatiated that nano-Ce is fabricated by the direct sedimentation method. The components and particles diameter of nano-Ce powders are analyzed by XRD and SEM . The thermodynamic analysis and acting mechanism of nano-Ce with Al in Fe matrix composites are researched, which shows that the reaction is generated between Ce and Al in the composite, that is, 3Ce+4Al2A +3[Ce], which obtains A and active [Ce] during the sintering process. The active [Ce] can improve the performance of Ce/Fe matrix composites. The suitable amount of Ce is about 0.05% in Ce/Fe matrix composites. SEM fracture analysis shows that the toughness sockets in nano-Ce/Fe matrix composites are more than those in no-added nano-Ce composites, which can explain that adding nano-Ce into Fe matrix composite, the toughness of the composite is improved significantly. Applied nano-Ce to Fe matrix diamond saw blades shows that Fe matrix diamond saw blade is sharper and of longer cutting life than that with no-added nano-Ce.

Wear Properties of Saw in Granite Cutting Process by Plasma Arc Heating

2012 ◽  
Vol 430-432 ◽  
pp. 1137-1140
Author(s):  
Bi Bo Xia ◽  
Zi Yu Zhao ◽  
Jin Guo Yang
Keyword(s):  
Industrial Applications ◽  
Plasma Arc ◽  
Wear Properties ◽  
Tool Wear Rate ◽  
Wear Performance ◽  
Hard And Brittle Materials ◽  
Diamond Saw ◽  
Blade Cutting ◽  
Arc Heating ◽  
Saw Blade

Thermally enhanced machining is an effective way of processing hard and brittle materials. The Wear performance of diamond saw blade cutting granite plate by Plasma-assisted heating is studied by a homemade experimental device. Investigation of the blade wear in different suspension and heating scan rate shows that by plasma arc heating, the tool wear rate has a significant reduction. A technology for the efficient stone machining and further industrial applications is provided in this paper.

Electron Probe Microanalysis of Frozen Hydrated Kidneys, Isolated Cells, and Cultured Cells

1982 ◽  
Vol 40 ◽  
pp. 402-403 ◽  
Author(s):  
Claude Lechene
Keyword(s):  
Liquid Nitrogen ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
Cultured Cells ◽  
Liquid Nitrogen Temperature ◽  
Elemental Content ◽  
Isolated Cells ◽  
Renal Tubular Cells ◽  
Diamond Saw ◽  
Saw Blade

Electron probe microanalysis of frozen hydrated kidneysThe goal of the method is to measure on the same preparation the chemical elemental content of the renal luminal tubular fluid and of the surrounding renal tubular cells. The following method has been developed. Rat kidneys are quenched in solid nitrogen. They are trimmed under liquid nitrogen and mounted in a copper holder using a conductive medium. Under liquid nitrogen, a flat surface is exposed by sawing with a diamond saw blade at constant speed and constant pressure using a custom-built cryosaw. Transfer into the electron probe column (Cameca, MBX) is made using a simple transfer device maintaining the sample under liquid nitrogen in an interlock chamber mounted on the electron probe column. After the liquid nitrogen is evaporated by creating a vacuum, the sample is pushed into the special stage of the instrument. The sample is maintained at close to liquid nitrogen temperature by circulation of liquid nitrogen in the special stage.

Tool Path Planning for Five-Axis U-Pass Milling of an Impeller

2021 ◽  
Author(s):  
J.Y. Feng ◽  
Z.C. Wei ◽  
M.J. Wang ◽  
X.Q. Wang ◽  
M.L. Guo
Keyword(s):  
Path Planning ◽  
Cutting Force ◽  
Tool Path ◽  
Flank Milling ◽  
Small Range ◽  
Tool Path Planning ◽  
Point Distribution ◽  
Parameter Domain ◽  
Five Axis ◽  
Tool Axis Vector

Abstract U-pass milling is a roughing method that combines the characteristics of flank milling with conventional trochoidal milling. The tool cuts in and out steadily, and the tool–workpiece wrap angle is maintained within a small range. This method can smooth the cutting force and reduce the peak cutting force while avoiding cutting heat accumulation, which can significantly improve the processing efficiency and reduce tool wear. In this study, a tool path model is established for U-pass milling, and the characteristic parameters of the path are defined. Through a comparative test of three-axis groove milling, it is demonstrated that the peak value and average value of the cutting force are reduced by 25% and 60%, respectively. An impeller runner is considered as the processing object, and the milling boundary parameters are pretreated. A tiling micro-arc mapping algorithm is proposed, which maps the three-dimensional boundary to the two-dimensional parameter domain plane with the arc length as the coordinate axis, and the dimensionally reduced tool contact point distribution form is obtained. The geometric domain tool position point and the interference-free tool axis vector are obtained by calculating the bidirectional proportional domain of the runner and the inverse mapping of any vector in the parameter domain. Finally, the calculation results are nested into the automatically programmed tool (APT) encoding form, and the feasibility of the five-axis U-pass milling tool path planning method is verified through a numerical example.

Experimental and Analytical Study of Micro-Serrations on Surgical Blades

2015 ◽  
Author(s):  
Marco Giovannini ◽  
Newell Moser ◽  
Kornel Ehmann
Keyword(s):  
Finite Element ◽  
Laser Ablation ◽  
Cutting Force ◽  
Human Skin ◽  
Finite Element Methods ◽  
Analytical Study ◽  
Soft Materials ◽  
Blade Cutting ◽  
Cutting Behavior ◽  
Fundamental Objective

This paper reports on a study and application of laser ablation for machining of micro-serrations on surgical blades. The proposed concept is inspired by nature and mimics a mosquito’s maxilla, which is characterized by a number of serrations along its edge in order to painlessly penetrate human skin and tissue. The focus of this study is to investigate the maxilla’s penetration mechanisms and its application to commercial surgical blades. The fundamental objective is to understand the friction and cutting behavior between a serrated hard surface and soft materials, as well as to identify serration patterns that would minimize the cutting force and the friction of the blade during tissue cutting. Micro-serrations characterized by different patterns and sizes ranging from 200 μm to 400 μm were designed and manufactured on surgical blades. As supported by finite element methods (FEM), a reduction of 20∼30% in the force during blade cutting has been achieved, which encourages further studies and their applications to biomedical devices.

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