Matching problems Matching problems mainly refer to the installation and matching of the chuck and the China cutting disc for metal. 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 and 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 cart” 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 protective cover should be installed firmly and reliably, 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.
Bracket problems Brackets are one of the commonly used attachments for grinders. Adjustable brackets must be provided for grinders with a specified grinding wheel diameter of 150 mm or more. The distance between the aluminum flat cutting disc and the bracket should be less than 1/2 of the minimum shape of the workpiece to be ground, but the maximum should not exceed 3 mm.
Grounding problems Grinders use power lines, so the enclosure of the equipment must have good grounding protection. This is also one of the important factors that cause accidents.