Precautions during the installation of brown corundum grinding wheel

When installing, firstly, the safety quality of the grinding wheel should be tested. The method is to tap the side of the grinding wheel with a nylon hammer (it can also be used with a pen). The sound is crisp and there is no problem. The positioning problem is where the grinder is installed, which is the first in our installation process. The problem to be considered is that we can only do other work if we choose a reasonable and appropriate location. Grinding machines are forbidden to be installed in the vicinity of the equipment and operators or in the places where people often pass. Generally, the larger workshops should be equipped with special grinder rooms. If it is not possible to set up a special grinder house due to the limitation of the plant topography, a protective baffle of not less than 1.8 m height should be installed on the front side of the grinder, and the baffle plate is required to be firm and effective. Balance problem The imbalance of the grinding wheel is mainly caused by the inaccurate manufacture and installation of the grinding wheel, which makes the center of gravity of the grinding wheel not coincide with the rotary shaft. The damage caused by unbalance is mainly manifested in two aspects. On the one hand, when the grinding wheel rotates at high speed, it causes vibration, which is easy to cause polygonal vibration marks on the surface of the workpiece. On the other hand, the imbalance accelerates the vibration of the main shaft and the wear of the bearing. This can cause the grinding wheel to rupture and even cause an accident. Therefore, it is required that the sand office building with a straightness greater than or equal to 200 mm should be statically balanced after loading the chuck. The grinding wheel should be statically balanced after being shaped and trimmed or found to be unbalanced during work. Matching problems Matching problems mainly refer to the installation and matching of the chuck and the grinding wheel. According to the standard requirements, the diameter of the grinding wheel chuck should not be less than 1/3 of the diameter of the installed sand office building, and the new grinding wheel should be replaced when the grinding wheel is worn to a diameter larger than the diameter of the chuck by 10 mm. In this way, there is a problem of matching the chuck and the grinding wheel. Otherwise, there will be such a situation that the “large horse-drawn carriage” causes waste of equipment and materials; the “small horse-drawn carriage” does not meet the safety requirements and is liable to cause personal accidents. Therefore, the reasonable matching of the chuck and the grinding wheel can save equipment and cut the material on the one hand, and meet the requirements of safe operation on the other hand. In addition, a cushion with a diameter larger than 2 mm of the chuck and a thickness of 1 mm to 2 mm should be installed between the grinding wheel and the chuck. Protection problem The protective cover is the most important protection device of the grinder. Its function is: When the grinding wheel is damaged due to work, it can effectively cover the grinding wheel fragments and ensure the safety of personnel. The shape of the wheel guard is round and square, and the maximum opening angle is not allowed to exceed 90°; the material of the shield is steel with a tensile strength of not less than 415 N/mm2. When replacing a new grinding wheel, the installation of the protective cover should be firm and reliable, and the protective cover should not be dismantled or discarded. Blocking the screen is one of the main protective attachments of the grinder. The opening of the guard above the horizontal plane of the main shaft is greater than or equal to 30 (this device must be provided. Its main function is to block the flying during the grinding process, so as not to hurt The operator is installed at the positive end of the opening of the protective cover, the width should be larger than the width of the wheel guard, and should be firmly fixed to the protective cover. In addition, the clearance between the circumferential surface of the grinding wheel and the baffle should be less than 6mm. It is one of the commonly used accessories for grinders. The grinders with a grinding wheel diameter of 150mm or more must be provided with adjustable brackets. The distance between the grinding wheel and the bracket should be less than 1/2 of the minimum shape of the workpiece to be ground, but the maximum It should not exceed 3mm. Grounding problems Grinding machines use power lines, so the outer casing of the equipment must have good grounding protection. This is also one of the important factors that cause accidents.