The reasons why the saw blade is broken are: the saw blade is too tight or too loose. The workpiece is not clamped correctly, and the sawing part is too far away from the jaw, resulting in jitter or looseness. After the kerf is skewed, it is forcibly corrected, so that the saw blade is twisted. Excessive force or sudden increase of pressure during sawing. The new saw blade got stuck in the gap of the old saw blade and broke. Generally, it is necessary to change the direction before sawing. If you can only saw from the old saw, you should reduce the speed and pressure and be especially careful.
The cutting part of the saw blade consists of many serrations, which is equivalent to a row of chisels with the same shape, and each tooth has a cutting function. Because sawing requires high working efficiency, it is necessary to make the cutting part have enough chip space, so the serration clearance angle is large.
Extended data:
In order to reduce the friction resistance on both sides of the saw seam and prevent the saw blade from being clamped or broken, all the serrations are staggered left and right according to a certain law and arranged in a certain shape when manufacturing the saw blade.
The hacksaw road is cross-shaped and wavy. After sawing the pot, the width of the joint on the workpiece is greater than the thickness of the back of the steel bar, so that the saw blade will not get stuck when sawing, and it will not overheat and accelerate wear.
Clamp the sawtooth forward on the saw bow, pay attention to the direction of the sawtooth, and ensure cutting when pushing forward. The tightness of the saw blade should be appropriate until it can be tightened with two fingers. In addition, the saw blade should not be skewed and twisted, otherwise it will be easily broken when sawing.
When lifting the saw, hold the saw blade with your left thumb flat, and push the handle steadily with your right hand. The angle of lifting the saw is about 15. If the sawing angle is too large, the sawtooth will be caught by the edge of the workpiece and fall off; If the sawing angle is too small, the sawtooth is not easy to cut into the workpiece, and may slip and damage the surface of the workpiece. The reciprocating stroke of the saw bow should be short, the pressure should be small, and the saw blade should be perpendicular to the surface of the workpiece.
Baidu encyclopedia-seesaw
Baidu encyclopedia-saw blade
Baidu encyclopedia-seesaw