3 How to prevent the occurrence of broken wheel in use
Broken generally due to incorrect installations can lead to discontinuity in the high-speed rotating grinding wheel gradually cracks caused by the grinding wheel occurs during use or during the grinding crash due to improper operation caused.
3.1 strictly required to install the wheel
(1) caught in the wheel of the wheel on both sides of the chuck, its shape, size should be the same.Diameter (2) flange mounted generally half the wheel diameter (minimum wheel diameter of not less than one-third), the inner surface have a groove.(3) grinding wheel and the wheel chuck contacting portion should be kept clean and smooth.
(4) with the wheel and the wheel chuck hole between not too tight, nor too loose, it should be placed at random.
(5) shall be accompanied by a compressible material (such as elastic cardboard, leather, oil and rubber, etc.) between the grinding wheel and washer made wheel chuck having a thickness between 0.5 to 3mm (better compression material thickness thicker ), is larger than the diameter of the outer diameter of the wheel chuck 2 a 4mm.
(6) should turn symmetrically tighten the screws on the wheel on the chuck (if a plurality of compression screw and tighten when the order shown in Figure 4), the clamping force evenly distributed, but not excessive force, preferably measured Torque wrenches the clamping force of each screw similar to prevent local excessive stress. This requires the grinding wheel in the ditch and install double-end mill is particularly important.
(7) installed on a multi-piece wheel chuck wheel, allows the use of a spacer between the separated wheel. Wheel diameter and clamping surfaces must be equal to the size of a spacer and the wheel chuck. We specialize in the manufacture of bonded grinding wheels allow or stacked installation. Some outer groove cut into the grinding process does not require the operator in the case of wheel sizes available, there had been unauthorized use of two stacked thin wheel alternative, which is a serious violation of the provisions practices must stop.
(8) is greater than or equal to 200mm diameter wheel mounted on the wheel chucks should be static balance (center of gravity balance method, three-point balance method). If not balance method of installation, you should check the radial wheel runout, deflection is too large, you should re-install the wheel.