1. Special attention should be paid to the installation of cutting discs on the grinding machine. Because the cutting piece works under high-speed rotation conditions, it should be carefully checked before use, and no cracks are allowed. The installation must be secure and should be statically adjusted to avoid personal and quality accidents.
Between the inner hole of the aluminum abrasive cutting disc and the outer circle of the cutting piece or the flange, it should not be too tight. Otherwise, it will be heated and expanded during grinding. It is easy to rupture the cutting piece, and it should not be too loose. Otherwise, the cutting piece is prone to eccentricity and loss of balance. So as to cause vibration. Generally, the matching clearance is 0.1~0.8mm, and the gap of the high-speed cutting piece is smaller. When clamping a cutting piece with a flange, the two flanges should be equal in diameter and the outer diameter should be no less than 1/3 of the outer diameter of the cutting piece. Apply a thick cardboard or oil-resistant rubber between the flange and the end face of the cutting piece to make the pressure evenly distributed. The tightening force of the nut should not be too large, otherwise the cutting piece will be broken. Note that the direction of rotation of the fastening thread should be opposite to the direction of rotation of the cutting piece, that is, when the cutting piece rotates counterclockwise, use a right-handed thread, so that the cutting piece will drive the nut more tightly under the action of the grinding force.

2. The balance of the cutting piece
Generally, the cutting piece having a diameter of more than 125 mm is balanced so that the center of gravity of the cutting piece coincides with its axis of rotation.
The unbalanced cutting piece will produce vibration when rotating at high speed, the quality of the color ringing processing and the precision of the machine tool. In severe cases, the machine will be damaged and the cutting piece will be broken. The original difficulty caused by the imbalance is mainly the uneven density of the parts of the cutting piece. Asymmetry in geometry and installation eccentricity. Therefore, the balance should be balanced before the cutting piece is installed. The balance of the cutting piece has two types: static balance and dynamic balance. Under the circumstance, only static balance is needed, but in the case of high-speed mushroom cutting (speed greater than 50m/s) and high-structural grinding, dynamic balancing must be carried out. The following figure shows the static balance device of the cutting piece. On the balance mandrel, then the cutting piece with the mandrel mounted is placed flat on the balance rail of the gimbal, and the cutting piece will swing back and forth until the swing stops. The balanced cutting piece can be stationary at any position.
If the cutting piece is unbalanced, its heavier part always turns to the bottom. At this point, the position of the weight can be moved to balance. The balanced cutting piece should be inspected for crack before being installed on the machine tool spindle. The cracked cutting piece is absolutely forbidden to be used. When installing, the cutting piece and the flange should be padded with 0. 5-1 volume elastic plate: two The diameter of the flange must be equal, and its size is generally half the diameter of the cutting piece. There should be a gap between the cutting piece and the cutting piece shaft or the step flange to prevent the main shaft from being thermally expanded to burst the cutting piece.
Method of balancing the cutting piece: loading a plurality of weights in the annular groove of the cutting piece flange, and adjusting the position of the weighting piece so that the center of gravity of the cutting piece coincides with its axis of rotation.

3. Trimming of the cutting piece
During the grinding process, the abrasive grains of the cutting piece are gradually rounded and become dull under the action of friction and extrusion, or when the tough material is ground, the grinding debris is often embedded in the pores on the surface of the cutting piece, so that the cutting piece is cut. The surface is clogged and eventually the cutting blade loses its cutting ability. At this time, a slip phenomenon occurs between the dicing sheet and the workpiece, and vibration and noise may be caused, the grinding efficiency is lowered, and the surface roughness is deteriorated. At the same time, due to the increase of grinding force and grinding heat, it will cause deformation of the workpiece and affect the grinding precision. In severe cases, it will cause burns and fine cracks on the grinding surface. In addition, due to the uneven hardness of the cutting piece and the different working conditions of the abrasive grain, the working surface of the cutting piece is unevenly worn, and the abrasive grains of each part are detached, which causes the cutting piece to lose the shape accuracy, affecting the shape precision and roughness of the workpiece surface. degree. In the case of the above situation, the5 inch resin cutting disc for metal must be trimmed, and a layer of abrasive on the surface is cut off to expose the surface of the cutting piece to the polished sharp abrasive grain to restore the cutting ability and shape accuracy of the cutting piece.