Are you right about the installation and balance of diamond grinding wheels during daily grinding?
1, diamond grinding wheel installation
In the installation of grinding wheels should pay special attention to the grinding wheel in high-speed rotation conditions, before use to be carefully checked, not allowed to have cracks, installation must be secure, and should be adjusted by a static balance, so as not to cause personal and quality accidents.
The grinding wheel inner hole and the grinding wheel shaft or the flange disc outside the circle, can not be too tight, otherwise the grinding is hot expansion, easy to swell the grinding wheel, can not be too loose, otherwise the grinding wheel is prone to eccentricity, loss of balance, causing vibration.
General fit gap is 0.1-0.8mm, high-speed grinding wheel clearance is smaller. When the grinding wheel is clamped with a flange disc, the diameter of the two flange discs shall be equal, and the outer diameter shall not be less than 1/3 of the outer diameter of the grinding wheel.
In the flange plate and grinding wheel end face between the application of thick cardboard or oil-resistant rubber, such as the pad, so that the pressure is evenly distributed, the tightening force of the nut can not be too large, otherwise the grinding wheel will crack;
2, the balance of diamond grinding wheel
The grinding wheel, which is generally larger than 125mm in diameter, is balanced so that the center of gravity of the grinding wheel coincides with its rotating axis.
Unbalanced grinding wheels produce vibrations at high speeds, affecting processing quality and machine accuracy, and, in severe cases, machine damage and grinding wheel fragmentation.
The main cause of imbalance of the original trapped is the uneven density of the parts of the grinding wheel, geometric shape asymmetry and installation eccentricity. Therefore, before the installation of the grinding wheel to balance, the balance of the grinding wheel has a static balance and dynamic balance two.
In general, only static balancing is required, but dynamic balancing is necessary when grinding at high speeds (speeds greater than 50m/s) and high-composition grinding. Place the grinding wheel on the balance shaft when balancing, then place the well-intentioned shaft on the balance rail of the balance frame, and the grinding wheel will swing back and forth until the swing stops. Balanced grinding wheels can be stationary anywhere. If the grinding wheel is unbalanced, the heavier part always goes down. The position of the balance block can then be moved to balance it. Balanced grinding wheels are checked for cracks before being installed on the main axis of the machine, and cracked grinding wheels are absolutely prohibited.
When installed, the grinding wheel and flange should be padded 0. 5-1mm elastic pad: the diameter of both must be equal, the size of which is generally half the diameter of the grinding wheel. There should be a certain gap between the grinding wheel and the grinding wheel shaft or the step flange to prevent the spindle from being heated to expand and cracking the grinding wheel.
Method of balancing the grinding wheel: Fill several balance blocks in the ring groove of the grinding wheel flange disc to make the grinding wheel center of gravity coincide with its swing axis by adjusting the position of the balancing block.
Everyone in the future when using diamond grinding wheel should pay attention to check, installation is correct and whether balanced. Ensure efficient and safe use of diamond grinding wheels.
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