Analysis of the Sawing Process With Abrasive Circular Saw Blades

2008 ◽  
Vol 130 (1) ◽  
Author(s):  
Masahiro Mizuno ◽  
Toshirou Iyama ◽  
Bi Zhang
Keyword(s):  
Size Effect ◽  
Numerical Solutions ◽  
Analytical Formula ◽  
Outer Edge ◽  
Cutting Edge ◽  
Edge Density ◽  
Maximum Deviation ◽  
Circular Saw ◽  
Circular Saw Blade ◽  
Sawing Process

This study simulates the sawing process with an abrasive circular saw blade and analyzes the generation of cutoff surfaces in the sawing process with the consideration of the blade deflection caused by the asymmetric wear of the blade outer edge. The analysis is built on the previous work of Matsui (1956, J. Jpn. Soc. Precis. Eng., 22, pp. 477–481) who presented an analytical formula for cutting force acting on a conical cutting edge. In this paper, the Matsui formula is modified to take into account the “size effect” of grinding and used to calculate the grinding force acting on the blade surface. A differential equation is constructed, and the related numerical solutions are provided to describe the blade deflection behavior in the sawing process. The study then discusses the influences of the “size effect,” workpiece length, workpiece speed and feed rate, as well as cutting edge density on sawing accuracies. Also discussed are workpiece speed and cutting edge density on the maximum deviation of the cutoff surface.

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

scholarly journals Influence of temperature distribution on circular saw blade natural frequencies during cutting

BioResources ◽  
2020 ◽  
Vol 16 (1) ◽  
pp. 1076-1090
Author(s):  
Miran Merhar
Keyword(s):  
Temperature Distribution ◽  
Temperature Difference ◽  
Natural Frequencies ◽  
Point Of View ◽  
Cutting Edge ◽  
Circular Saw ◽  
Rate Of Increase ◽  
Circular Saw Blade ◽  
Saw Blade ◽  
Experimental Findings

When cutting wood, heat is generated in the cutting zone and in the gullet due to the friction between the teeth of the blade and the material that is being cut. Since the wood is hydrophilic, the saw blade cannot be cooled with liquids, as is usual when cutting metals. The only way to remove the heat from the source is by conductivity to the centre of the saw blade and then by convection into the air. This research presents an analytical model to calculate the natural frequencies of circular saw blades exposed to different temperature distributions. The model confirmed experimental findings of many authors, i.e. the heating of the saw blade cutting edge reduces its natural frequencies, the rate of the reduction depending on the temperature difference between the cutting edge and the rest of the blade and on the shape of the temperature distribution. In contrast, heating the centre of the saw blade increases its natural frequencies, the rate of increase depending on the temperature difference and the shape of the temperature distribution. With the presented model, the most favourable temperature distribution can be calculated from the point of view of the critical saw blade speed, which can be achieved by heating or cooling the centre of the saw blade.

scholarly journals Research on residual stress field control mechanism of circular saw blade considering its body structure

2021 ◽  
Vol 13 (5) ◽  
pp. 168781402110162
Author(s):  
Yuan An ◽  
Bo Li
Keyword(s):  
Residual Stress ◽  
Theoretical Calculation ◽  
Outer Edge ◽  
Residual Stress Field ◽  
Compression Process ◽  
Plastic Compression ◽  
Circular Saw ◽  
Calculation Results ◽  
Circular Saw Blade ◽  
Saw Blade

In this paper, 3D roll tensioning elastoplastic model was built by finite element method and the research object was a common circular saw blade body with hole, slot, and scraper structure. The theoretical calculation results show that there are areas dominated by tangential compressive stress near slot and scraper of roll tensioned saw blade body, which is not the expected result. It is proved that residual stress of saw blade body can be regulated by combining roll tensioning and local plastic compression process in this paper. The theoretical calculation results show that the outer edge of saw blade body near slot and scraper becomes area dominated by tangential tensile stress after the improved tensioning process. The improved tensioning process has little effect on stiffness and waist strength of circular saw blade.

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.

scholarly journals Analysis a cutting edge geometry influence on circular saw teeth at the process of crosscutting wood

2009 ◽  
Vol 57 (5) ◽  
pp. 177-182 ◽  
Author(s):  
Ján Kováč ◽  
Milan Mikleš
Keyword(s):  
Cutting Tools ◽  
Measurement Procedure ◽  
Cutting Edge ◽  
Production Costs ◽  
Cutting Process ◽  
Detailed Measurement ◽  
Edge Geometry ◽  
Circular Saw ◽  
Measuring Devices ◽  
Circular Saws

Nowadays, the wood cutting process looks like a technological scheme consisting of several connected and relatively inseparable parts. The crosscutting wood is the most widespread in the process of fo­rest exploitation; it is used at tree exploitation, shortening stems and assortment production. The article deals with the influence of the cutting edge geometry of circular saws on the torque and also on the cutting performance at the crosscutting wood therefore there is the influence on the whole cutting process. In the article there is described detailed measurement procedure, used measuring devices and the process of results analysis. Knowledge of wood crosscutting process and choice of suitable cutting conditions and cutting tools will contribute to decrease production costs and energy saving.

Standzeitoptimierung von Kreissägewerkzeugen/Optimization of the tool life of circular saw blades

2021 ◽  
Vol 111 (11-12) ◽  
pp. 833-839
Author(s):  
Kolb Moritz ◽  
Tim Mayer ◽  
Nico Rasenberger
Keyword(s):  
Service Life ◽  
Tool Life ◽  
Model Test ◽  
Wear Behavior ◽  
Cutting Edge ◽  
Circular Saw ◽  
Single Tooth ◽  
Cutting Edge Preparation ◽  
Saw Blade ◽  
Edge Preparation

Dieser Beitrag beschreibt, wie sich die Standzeit von Kreissägeblättern durch Schneidkantenpräparation gezielt beeinflussen lässt. Hierfür wurden zunächst einzelne Segmente aus einem Sägeblatt herausgetrennt und Einzahnproben mit variierenden Schneidenmikrogeometrien mittels Bürstspanen präpariert. Anschließend wurde das Einsatz- und Verschleißverhalten der zuvor hergestellten Proben in einem Kreissäge-Modellversuch untersucht.   This article describes how the service life of circular saw blades can be specifically influenced by cutting edge preparation. For this purpose, individual segments were first cut out of a saw blade. These single-tooth specimens with varying cutting edge microgeometries were prepared by abrasive brushing. Then the usage and wear behavior of the previously produced samples was investigated in a circular saw model test.

COMPARISON OF EXPERIMENTALLY MEASURED AND SIMULATED WORKPIECE AND GRINDING WHEEL TOPOGRAPHY USING A NEW DRESSING MODEL

2016 ◽  
Vol 40 (1) ◽  
pp. 1-17 ◽  
Author(s):  
Abdalslam Darafon ◽  
Andrew Warkentin ◽  
Robert Bauer
Keyword(s):  
Surface Finish ◽  
Metal Removal ◽  
Ground Surface ◽  
Cutting Edge ◽  
Edge Density ◽  
Grinding Wheel ◽  
Workpiece Surface ◽  
Wheel Topography ◽  
Grinding Wheel Topography ◽  
Grinding Conditions

This paper presents a new empirical model of the dressing process in grinding which is then incorporated into a 3D metal removal computer simulator to numerically predict the ground surface of a workpiece as well as the dressed surface of the grinding wheel. The proposed model superimposes a ductile cutting dressing model with a grain fracture model to numerically generate the resulting grinding wheel topography and workpiece surface. Grinding experiments were carried out using “fine”, “medium” and “coarse” dressing conditions to validate both the predicted wheel topography as well as the workpiece surface finish. For the grinding conditions used in this research, it was observed that the proposed dressing model is able to accurately predict the resulting workpiece surface finish for all dressing conditions tested. Furthermore, similar trends were observed between the predicted and experimentally-measured grinding wheel topographies when plotting the cutting edge density, average cutting edge width and average cutting edge spacing as a function of depth for all dressing conditions tested.

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