scholarly journals GEOMETRY OF KERF WHEN CURVE SAWING WITH A CIRCULAR RIP-SAW

2021 ◽  
Author(s):  
Nikolai Jujukin
Keyword(s):  
Vertical Direction ◽  
Kerf Width ◽  
Horizontal Position ◽  
Varying Thickness ◽  
Circular Saw ◽  
Circular Saw Blade ◽  
The Creation ◽  
Saw Blade ◽  
Theoretical Results ◽  
Flat Geometry

Rip-sawing following the curvature of a crooked log means advantages for yield. However, the possibility to saw in a narrow curve with a circular saw blade is limited because of the inherently flat geometry of circular saw blades. For a double arbour circular saw the situation is even more problematic because the two blades have a certain overlap and thus, the two arbours are not positioned in the same horizontal position. In this study, a theoretical geometrical study of the creation of a kerf with a single circular saw blade and with a double arbour circular saw with two saw blades was examined. Results for stiff saw blades show that the kerfs become in general curved and inclined (tilted) in the vertical direction and also that the width of the kerfs for double arbour saws becomes wider at the top and bottom of the cant than in the middle. Additionally, the sawn boards obtain varying thickness along their width because of the varying kerf width. A comparison with experimental thickness data from four test sawings at a sawmill indicates that the theoretical results are valid and that curve sawn boards become thinner than straight sawn boards.

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.

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 Comparison of Natural Frequencies Values of Circular Saw Blade Determined by Different Methods

2015 ◽  
Vol 66 (2) ◽  
pp. 123-128
Author(s):  
Ján Svoreň ◽  
Ľubomír Javorek ◽  
Adam Droba ◽  
Dušan Paulíny
Keyword(s):  
Natural Frequencies ◽  
Circular Saw ◽  
Circular Saw Blade ◽  
Saw Blade

The Influence of Tangential Roller Pressure on the Stability of Circular Saw Blade

2014 ◽  
Vol 614 ◽  
pp. 32-35 ◽  
Author(s):  
Ming Song Zhang ◽  
Yi Zhang ◽  
Jian Jun Ke ◽  
Xiao Wei Li ◽  
Lian Bing Cheng
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Symmetric Model ◽  
The Finite Element Method ◽  
Circular Saw ◽  
The Face ◽  
Circular Saw Blade ◽  
Cyclic Symmetric ◽  
The Stability ◽  
Saw Blade

The finite element method was used to study tangential roller method impact on the stability of circular saw blade. Using 30 ° cyclic symmetric model is analyzed. The results show that the tension of the saw blade is not the same, and tensioning effect is different, when the tangential roller pressure is not same. At the same time, after tangential roller, the face run out of saw blade is small, which show that the smoothness of tangential roller is better.

Diamond Circular Saw Blades Noise Attenuation and Finite Element Modal Analysis

2013 ◽  
Vol 444-445 ◽  
pp. 129-133 ◽  
Author(s):  
Ming Song Zhang ◽  
Pu Xian Zhu ◽  
Jian Jun Ke ◽  
Yi Kuan Zhu
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Natural Frequency ◽  
Slot Width ◽  
Noise Attenuation ◽  
Circular Saw ◽  
Slot Length ◽  
Circular Saw Blade ◽  
Saw Blade

The finite element modal analysis was used to study natural frequency of circular saw blade, when slotted. Finding the frequency of slotted is smaller than no slotted saw blade, showing that slot can have the effect of noise attenuation. The increasing of slot length, slot width, slot position, slot number can reduce the natural frequency of circular saw blade on the whole. The orthogonal text was used to study slot parameters. Finding that slot parameters’ influence of primary and secondary relations on saw blade first five natural frequency is slot position > slot number> slot length > slot width.

scholarly journals Microcontroller Based Efficient Automated Cattle Fodder System

2019 ◽  
Vol 9 (2) ◽  
pp. 2484-2486
Keyword(s):  
Future Development ◽  
Feeding Activity ◽  
Cattle Feed ◽  
Electrical Systems ◽  
Circular Saw ◽  
Cattle Feeding ◽  
Long Time ◽  
Circular Saw Blade ◽  
Saw Blade ◽  
Predetermined Time

An automatic fodder system Was developed that automatically feed the cattle food (sorghum) at a predetermined time without the need of labour . In a way, it is to control the cattle feeding activity by using a system that is generally combined with the mechanical system and electrical systems to form an automatic fodder system (AFS) instead of manually feeding. The cattle owners whom are away for a long time will have troubles about knowing the situation of the feeding cattle. Thus, this automatic cattle fodder device is very convenient, and easily monitorable. The device will consist of a gear motor, wiper motor, circular saw blade, conveyor and Microcontroller8051.The cutter is used to cut the sorghum into small pieces a to fed the cattle. This improves the animal digestion and prevents animal from rejecting any part of their food. A timer is used to control the number of cutting time at an interval of time. Plus, there is an IR sensor to sense the cattle feed. With this, the user or the owner can be away from home get benefited through useful data that are receivable through communication. Further future development may be done by including the load cell to measure the exact weight of the chaffs for the analysis purpose which is helpful for efficient cattle fodder system.

scholarly journals The Shapes of Teeth of Circular Saw Blade and Their Influence on its Critical Rotational Speed

2015 ◽  
Vol 63 (2) ◽  
pp. 399-403 ◽  
Author(s):  
Adam Droba ◽  
Ján Svoreň ◽  
Ján Marienčík
Keyword(s):  
Adverse Effects ◽  
Rotational Speed ◽  
Natural Frequencies ◽  
Computer Software ◽  
Variable Parameter ◽  
Circular Saw ◽  
Critical Rotational Speed ◽  
Circular Saw Blade ◽  
Saw Blade ◽  
High Level

The main problems during cutting with circular saw blade are inaccurate cut, low quality of surface, high level of noise. These adverse effects are related to oscillation of circular saw blade. This oscillation cause adverse effects not only on workpiece but also on tool. In some case the circular saw blade reaches the value of critical rotational speed which leads to its instability and cause the oscillation of blade which may leads to destruction of tool. So the reduction of the amplitude of oscillation is essential for removing the adverse effects. This paper deals about influence of shapes of teeth as a type of modification that has positive effect oncritical rotational speed of circular saw blade. The parameters of studied models of circular saw blade were 42 number of teeth and the height of teeth with slice from sintered carbide was 14 mm. The variable parameter was the ratio between surface of teeth and surface of teeth gap. In this study was used computer software Creo Parametric 1.0 for obtaining natural frequencies of studied models. This software uses in analysis finite element method (FEM). There were done some steps to idealize the models. For calculating static and dynamics natural frequencies of modelswere used modal analysis. The critical rotational speed was calculated from obtained results by Creo Parametric 1.0 and compared on 5 models of tool.

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