How to choose the suitable grinding wheels for carbide saw blades
The sawtooth sharpening of carbide saw blade is mainly for the back, supplemented by sharpening the front, and there is no special requirement for tooth side. In addition, owing to the side relief angle is much smaller than the edge clearance angle, and the reduction of the top tooth has little effect on the width of the saw set. So the sharpening key point is the back of the tooth.
The bond strength of this type of diamond grinding wheel is weaker than that of other wheels. The self-sharpening for carbide saw blade is better, no blocking. The grinding force and grinding temperature are low. Wear resistance is poor, and the wear of abrasive tools is high and is not suitable for heavy load grinding.
Usually, dish grinding wheels are used. When sharpening staggered teeth or trapezoidal teeth, it needs to do tilt adjustment for the axis of the diamond grinding wheel or the axis of the saw table clamped with a saw blade. The angle between the grinding wheel working face and the back teeth face is equal to the bevel angle of the back teeth, which should be sharpened staggered every other tooth. When sharpening the back of the flat teeth, the grinding wheel working face should be parallel to the back teeth face.
Usually, dish grinding wheels are used. When the front bevel angle is equal to zero, the diamond grinding wheel working face and tooth front face is perpendicular to the horizontal surface. When sharpening the saw blade with a front bevel angle, the saw table or grinding wheel should be inclined at an angle equal to the front bevel angle. In addition, staggered sharpen every other tooth.
Usually, the tooth side does not need to be sharpened. If need to sharpen, the dish grinding wheel working face should be inclined to meet the requirements of sawing angle and side rear angle. Plant grinding wheel can also be used for sharpening. The purpose of tooth side sharpening is to make the tooth side edge on the same cutting surface in order to improve the sharpening quality.
The thickness center of the saw body must be on the same surface as the axis of the grinding wheel, otherwise, the position of the left and right teeth tips will be different. When adjusting the machine tool, first adjust the height of the two to be exactly the same, and then adjust the whole bevel angle.