The grinder is a machine tool that uses abrasive tools to grind the surface of the workpiece. Grinding machines have a wide range of applications, not only for high-precision, high-efficiency grinding, but also for grinding with small surface roughness, and suitable for processing a variety of hard and brittle materials, so they are widely welcomed in industrial applications. Here are some safety protection knowledge of grinders to introduce to you.
Grinding is widely used and is one of the main methods for precision machining of machine parts. However, due to the high speed of the grinding wheel of a surface grinder, the grinding wheel is relatively hard, brittle, and cannot withstand heavy impacts. Occasionally improper operation can cause very serious consequences if the grinding wheel is broken. Therefore, the safety technical work of the grinding process is particularly important, and reliable safety protection devices must be adopted, and the operation must be concentrated to ensure that it is foolproof. In addition, the fine sand and metal shavings splashed from the workpiece of the grinding wheel during grinding can hurt the eyes of workers. If workers inhale a large amount of this kind of dust, it is harmful to the body. Appropriate protective measures should also be taken. Attention should be paid to the following safety technical issues during grinding.
The machine tool should be thoroughly inspected carefully before driving, including the inspection of the operating mechanism, electrical equipment, magnetic chuck and other fixtures. After inspection, lubricate and test run after lubrication to confirm that everything is in good condition before use.
Pay attention to the clamping and clamping when loading the workpiece. The loosening of the workpiece during the grinding process will cause the workpiece to fly out and injure people or break the grinding wheel. When starting to work, use the manual adjustment method to make the grinding wheel slower and approach the workpiece, and the starting feed should be small, and excessive force is not allowed to prevent collision with the grinding wheel. When it is necessary to control the reciprocating movement of the worktable with the stopper, it is necessary to accurately adjust the length of the workpiece according to the grinding length, and the stopper should be tightened.
When replacing the grinding wheel, you must first perform a visual inspection to see if there is any trauma, and then hit with a wooden hammer or wooden stick. The sound is required to be crisp and free of cracks. When installing the grinding wheel, it must be assembled according to the specified methods and requirements. After the static balance debugging, the installation and the test run, and everything is normal, then it can be used.
Workers should wear protective glasses during work, and dress the grinding wheel in a balanced manner to prevent impact. Measure the workpiece, adjust or wipe the machine tool after stopping. When using a magnetic chuck, clean the disk surface and the workpiece, close it tightly, and suck it firmly. If necessary, add a stopper to prevent the workpiece from shifting or flying out. Pay attention to the protection of the grinding wheel or the baffle of the machine tool, and the position should pass the front of the high speed rotating grinding wheel.
The machining industry has a wide range of products processed, and the size of the workpiece is different, and the processing accuracy is different. The relative requirement of the grinding wheel speed is different from the spindle linear speed. It is difficult to adjust the spindle speed to meet the workpiece processing linear speed to the ideal state. In addition, due to the stress bending produced by the shaft machining process, the grinding process will produce different grinding wheel feed torques, which will bring about different changes in the output speed/torque of the grinding wheel, and correspondingly will produce vibration knife marks/burning marks, etc., and the grinding accuracy It is difficult to guarantee, resulting in low production efficiency and low quality products rate.