A cutting piece is an inhomogeneous object. When the customized metal cutting disc rotates, the center of mass does not coincide with the center of rotation to cause vibration. This state is called the imbalance of the cutting piece. Unbalanced cutting blades can cause a lot of harm:
• Acting on the grinding machine bearing to make the main shaft vibrate and accelerate the wear of the grinding machine spindle;
• An additional increase in the rotational stress experienced by the cutting piece, reducing its rotational strength, and may even cause it to rupture upon rotation;
• Increase the vibration of the cutting piece and the workpiece system, which is manifested by the occurrence of vibration marks on the surface of the workpiece being processed, and the machining accuracy and surface roughness are deteriorated;
• Affect the uniformity of the sharpness of the cutting piece, making the cutting piece wear unevenly.
The static balance of the China cutting disc for metal is also one of the main quality indicators reflecting the intrinsic characteristics and performance of the cutting piece. The static balance failure is classified as “heavy defect” in the standard, that is, “seriously reduce the product performance and have the performance of the machined part. Seriously affected defects.” In the spot check, the static balance is not qualified as shown in Table 2. Among them, a fiber reinforced resin sheet cutting piece with a diameter of 400 mm and a linear velocity of 70 m/s, the standard static imbalance value is ≤13 g, but the actual measurement exceeds 18 g. The vibration of the cutting piece during use is conceivable.