The vibration of the circular saw blade refers to the reciprocating lateral movement of the saw blade near its equilibrium position. In most circular saw blades used in woodcutting, the transverse vibration mode of the saw blade is composed of 0-6 pitch diameter and 0 pitch circle. The force of the workpiece on the saw blade, the imbalance of the saw blade and the saw shaft, or the external force caused by the vibration of the drive motor will become the exciting force.
To diminish vibrations caused by centrifugal force and imbalance in weight, blades are carved with tight slits in the middle of a blade plate, between the arbor and teeth. Anti-vibration saw blades are designed to prevent undesired effects and perform smooth cuts without stabilizers. Saw blade rubber dampeners and scoring blades aren’t required if you simply use a quality blade.
This is because only the rim part of the saw blade has the same amplitude as the saw blade in these high-order and alternate-tooth vibration modes, even if the saw blade has outer and inner slots with damping material for the suppression of vibration. In this study, the natural vibration mode and natural vibration frequency for a circular disc and saw blade models were calculated using the finite element method modal analysis, and the generated condition of the self-excited alternate-tooth vibration mode was discussed. Alternate-tooth vibration was generated, and its amplitude was excited at a rotational speed of 70 and 72 rps, where the forward wave f25f is slightly less than a double of the tooth passage frequency 2RZ. Additionally, alternate-tooth vibration was generated at a rotational speed, 42 rps, where the backward wave f25b is slightly less than a double of the tooth passage frequency 2RZ. The alternate-tooth vibration was confirmed in both Fig.
Vibration is harmful in any sawing machine, but in high production saws with hard, and brittle, carbide tipped blades,it can be absolutely catastrophic. Reducing vibration is the main focus for machine designers, because vibration dramatically reduces the effectiveness and tool life of the saw blade and will increase the overall cost-per-cut. Machine designers pay close attention to certain vibration frequencies, because not all vibration frequencies have a damaging effect.
Mote CD Jr, Rahimi A Real time vibration control of rotating circular plates by temperature control and system identification. Sun JC, Wang XG, Xi FJ Sliding mode active vibration control of circular saws. Xi F, Wang XG, Qin Z Modelling and analysis for active control of circular saw vibrations.
circular saw blade vibration Related Question:
Why does my circular saw vibrate?
The vibration of the saw blade is caused by external interference and is always expressed as a certain “level”. The vibration will increase saw path loss, reduce sawing accuracy, increase the noise level, and shorten the service life of saw blades.
How do you know when a circular saw blade needs to be replaced?
Look for worn-down, chipped, broken and missing teeth or chipped carbide tips that indicate it’s time to replace a circular saw blade. Check the wear line of carbide edges using a bright light and magnifying glass to determine if it’s beginning to dull.
Why does my circular saw bounce back?
Overheating a saw blade can cause it to warp and result in a kickback. Buildup of sap on the blades, insufficient set, dullness and unguided cuts, can all cause an overheated blade and kickback. Never set a blade deeper than is required to cut the work piece 1/8 in. to 1/4 in.
How do I stop my scroll saw from vibrating?
If this is why your saw is vibrating too much, you should add some weight to balance it out. What is this? You can use sandbags, steel weights, lead, or concrete as extra weights. Adding weight shifts most of the smaller vibrations away from where you are cutting.
Why are there holes on circular saw blades?
What Is the Arbor Hole? The center hole is technically considered the arbor hole. It’s essential to understand the connection between the bore and the shaft. You’ll need to know the shaft’s diameter when you’re selecting a blade, as a precise fit between the two will ensure steady spin and cut efficiency.
How long do Diablo blades last?
They can last between 12 and 120 hours of continuous use, depending on the quality of the blade and material they’re used to cut.
How do I know if my diamond blade is dull?
If you want to know how to tell if a diamond saw blade is dull, you need to keep an eye on it and check these symptoms: Unusual vibrations when the saw is turned on. Slow cutting speed when working on an easy material. Obvious signs of warping or damage.
Why does my circular saw blade stop spinning?
The most common reason your circular saw blade stops spinning is because your workpiece is pinching the blade. This can also cause the blade to kickback. To prevent this from happening you need to support your workpiece properly to allow it to set securely through the entire cut.
What makes a saw kick back?
Kickback occurs when the teeth of the saw blade, moving at tip speeds of 120 miles-per-hour impart sufficient force to cause the workpiece to move in a violent and unexpected manner. Skil saw kickback tends to throw the saw back at the operator, its blade often running over fingers as it moves backwards.
Does a circular saw cut up or down?
Circular saws cut on the upward stroke, which means that they rotate in a clockwise fashion, cutting from the bottom up. This is why when you’re using a circular saw, the side of the wood that will be your “good” side should be facing down.
Why is my circular saw cutting crooked?
The nuts and screws that hold the blade of a circular saw can become loose when the saw is used for a long time. The blade may also become misaligned. Tip: If the blade is wobbling because of loose nuts and screws or improper alignment, you should fix it appropriately. A properly fixed blade will not wobble as you cut.
Is it worth sharpening circular saw blades?
When your circular saw blade becomes dull, not only will it give you a rougher finish, but your saw’s motor will have to work harder and may burn out sooner. Sharpening your saw blades will save you money in the long run because you’ll get better cuts, and you’ll have to replace your saw and blades less often.
Is Diablo made by Freud?
The Freud Group is a global supplier of circular-saw blades, router bits, and cutters for enthusiast woodworkers, professional and industrial users. They produce under both the Freud and Diablo brands.
Are Diablo blades worth it?
Diablo blades are available in a wide selection of sizes and styles and are easy to find online and locally at Home Depot. The consensus is that Diablo saw blades balance great quality with excellent value, and are a good choice when replacing or upgrading the OEM blades that are often bundled with new saws.
Do diamond blades wear out?
That’s because a diamond blade cuts with the diamonds impregnated into its cutting segments. These diamonds wear down during cutting, despite being one of the hardest substances on earth. When these diamonds are worn out, then your diamond blade is worn out, and you’ll need to replace it [1].
