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.

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.

Dry-Cutting Concrete Study of Diamond Saw Blade with Different Segment Width

2006 ◽  
Vol 532-533 ◽  
pp. 321-324 ◽  
Author(s):  
Shan Shan Hu ◽  
Cheng Yong Wang ◽  
Bang Dao Chen ◽  
Ying Ning Hu
Keyword(s):  
Cutting Parameters ◽  
Structure Parameters ◽  
Optimum Structure ◽  
Dry Cutting ◽  
Workpiece Material ◽  
Sawing Force ◽  
Circular Saw ◽  
Circular Saw Blade ◽  
Diamond Saw ◽  
Saw Blade

Three kind of diamond circular saw blade with different structure parameters are designed in this paper. Adopted single-factor test, sawing force and vibration are measured by cutting several kinds of strength concrete in different cutting parameters. The analysis to characters of sawing force and vibration helps to find out optimum structure of diamond saw blade with different segment width, more rational sawing parameter and its adaptability to workpiece material.

scholarly journals Characteristics of self-excited alternate-tooth vibration of circular saw blade

BioResources ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. 3840-3850
Author(s):  
Ken Takeyama ◽  
Hideyuki Yokochi ◽  
Satoru Nishio ◽  
Satoru Tsuchikawa
Keyword(s):  
Solid Wood ◽  
Vibration Modes ◽  
The Finite Element Method ◽  
Cutting Resistance ◽  
Circular Saw ◽  
Cutting Surface ◽  
Speed Range ◽  
Circular Saw Blade ◽  
Saw Blade ◽  
Cutting Experiments

In recent years, circular saw blades with thinner kerfs have been in high demand for improvement of the production yield of wood-based materials and the reduction of sawdust. In the case of ripping of solid wood, the number of teeth of a circular saw blade is normally set to 40 or 50, with a diameter of 305 mm, which allows less cutting resistance and smooth exhausting of sawdust. However, at certain rotational speeds, self-excited alternate-tooth vibration can easily occur in circular saw blades with such thin kerfs and so few teeth. Therefore, the cutting surface quality tends to be worse. In this study, the mechanism of this self-excited alternate-tooth vibration was clarified. The vibration mode and frequency were predicted by the finite element method. In addition, a circular saw blade with a body thickness 1.5 mm and 50 teeth was employed for wood-cutting experiments. The rotational speed range of the self-excited alternate-tooth vibration modes and their frequencies were investigated. When a double of the tooth passage frequency was slightly higher than the frequencies of the alternate-tooth vibration modes, an alternate-tooth vibration of the regenerative chatter type was excited, owing to the forces on the sides of the tooth.

Dynamic Analysis of Metal Circular Saw Blade

2014 ◽  
Vol 496-500 ◽  
pp. 222-226 ◽  
Author(s):  
Xin Tan ◽  
Hu Huang ◽  
Lin Chen ◽  
Qing Bin Zhang
Keyword(s):  
Finite Element ◽  
Cutting Parameters ◽  
Element Analysis ◽  
Circular Saw ◽  
Circular Saw Blade ◽  
Stress And Deformation ◽  
Dynamics Calculation ◽  
Saw Blade ◽  
Sawing Process

During the sawing process of cold sawing machine, it emergences of blade wear too fast, the current is too large, sawing not high quality of rolled products,Be aimed at those problem, the paper established the finite element of side shake structure saw blade and ordinary flat blade model, and using the ANSYS finite element analysis software to make the dynamics calculation about the two kinds of saw blade. Through the analysis and comparison of backlash saw blade and natural frequency, different cutting parameters effect of stress and deformation of the saw tooth transient, and the simulation results will be applied to the field of sawing testsThe results show that the backlash saw blade in the vibration characteristics, performance and other aspects of the force and deformation are improved compared with the ordinary blade

Simulation Analysis of Nonlinear Dynamics for Stone-Cutting with Circular Saw Blade

2013 ◽  
Vol 281 ◽  
pp. 234-238
Author(s):  
Tao Yao ◽  
Guo Lin Duan ◽  
Yang Gao
Keyword(s):  
Sliding Friction ◽  
Simulation Analysis ◽  
Damage Model ◽  
Cutting Parameters ◽  
Cutting Process ◽  
Transient Strain ◽  
Circular Saw ◽  
Circular Saw Blade ◽  
Stone Cutting ◽  
Saw Blade

A nonlinear numerical simulation model of stone-cutting circular saw blade was developed for the purpose of understanding the mechanics of cutting process by employing LS-DYNA program. Based on the classical damage model theory and fracture criterion, the action of cutting stone is mainly considered as extruding sliding friction and pressing. The movement rule and wear mechanism were analyzed in stone cutting process. After the transient strain field was obtained, the corresponding pressure was calculated. The results showed the present method is applicable to forecasting and optimizing the cutting parameters for efficient control and improvement of separation.

Effects of Cutting Parameters on the Transverse Vibration of Diamond Circular Saw Blade

2010 ◽  
Vol 126-128 ◽  
pp. 667-671 ◽  
Author(s):  
Huai Ying Fang ◽  
Yuan Li ◽  
Hui Huang ◽  
Xi Peng Xu
Keyword(s):  
Axial Force ◽  
Transverse Vibration ◽  
Cutting Parameters ◽  
Measuring System ◽  
Wireless Sensor ◽  
Axial Deformation ◽  
Circular Saw ◽  
Circular Saw Blade ◽  
The Time Domain ◽  
Saw Blade

The effects of cutting parameters on the transverse vibration of diamond circular saw blade were experimentally investigated. Transverse vibration was online measured by a novel measuring system developed by wireless sensor. Meanwhile, axial force on saw blade was measured by a dynamometer. By the experimental results under different cutting parameters, the time domain characteristics of transverse vibration of saw blade were analyzed, and the relationships between transverse vibration and cutting parameters were also obtained. Axial deformation is greatly influenced by the axial force acting on saw blade.

scholarly journals Interchange of Heat in Saw Disc Body During Cutting

2019 ◽  
Vol 4 (1) ◽  
pp. 488-494
Author(s):  
Jan Svoren ◽  
Lubomir Javorek ◽  
Lubomir Nascák
Keyword(s):  
The Body ◽  
Experimental Results ◽  
Measured Temperature ◽  
Infrared Thermometer ◽  
Circular Saw ◽  
Spruce Wood ◽  
Circular Saw Blade ◽  
Saw Blade ◽  
Picea Excelsa

The paper presents the experimental results of a research aimed at the distribution of the temperature on the circular saw blade body. The temperature was measured at two distances from the centre of the circular saw blade body (70 mm, 140 mm) by means of an infrared thermometer. Two circular saw blades with the diameter of 350 mm and a variable adjustment of the body (with slots and without the coating, with both slots and coating) were used for the longitudinal sawing of the spruce wood (Picea excelsa) with the thickness of h = 37 mm. Feed speeds ware vf1 = 14 mpm, vf2 = 17 mpm and vf3 = 20 mpm. Cutting revolutions n = 4100 /min. were constant. The measured temperature was in the range from 21 °C till 27 °C. The highest measured temperatures were recorded on the circular saw blade with the slots and coating.

The Mechanical Analysis of the Composite Reinforced Circular Saw Blade

2011 ◽  
Vol 228-229 ◽  
pp. 484-489
Author(s):  
Xiao Ling Wang ◽  
Zhong Jun Yin ◽  
Chao Zhang
Keyword(s):  
Volume Fraction ◽  
Mechanical Analysis ◽  
Loading Conditions ◽  
Circular Saw ◽  
Model And Simulation ◽  
Circular Saw Blade ◽  
Saw Blade ◽  
Reinforcement Model ◽  
Circular Saws ◽  
Composite Reinforcement

Thinner saw blades cannot resist large lateral cutting forces due to their lower stiffness. In this paper we propose a composite reinforcement method to improve the mechanical properties of circular saw blades. We analyze and simulate the stress and strain fields of our proposed reinforced circular saws by Finite element method. Our analytical results contain not only influences of reinforcing parameters but also loading conditions on the lateral stiffness and the natural frequency of composite saw blades. Here the reinforcing parameters include: 1) the reinforcement location on circular saw blades, 2) the volume fraction of the reinforcements, 3) the number of the reinforcements; and loading conditions include: 1) the cutting force, 2) the rotational speed. Our composite reinforcement model and simulation results can contribute to a better design of circular saw blades.

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