Safety operating procedures for grinder internship
Grinding machines are one of the most accident-prone pieces of equipment in the workshop, and every year someone gets seriously injured because they omit one of the inspection steps.
Go through each item before boarding the plane
Before you prepare to start the vehicle, you need to restore each handle and handwheel to the correct position. Make sure that the grinding wheel and the gasket cap are not loose. As for the protective cover and protective screen, none of them can be missing. They must not be missing.
Let's take a look at the situation in a machinery factory somewhere. The operator inside did not check whether the protective cover existed. As a result, the grinding wheel suddenly shattered, and then the iron pieces flew everywhere, directly injuring the person's eyes, and finally lost more than hundreds of thousands of dollars.
It does not take more than two minutes to check the safety regulations for grinding operations , but if you save these two minutes, it may take a lifetime. It is recommended that the inspection items be printed on the safety regulations for grinding and processing operations next to the machine tool. Each time you go on the machine, check the safety regulations for grinding and processing operations and the safety operating regulations for grinding internships to form muscle memory before doing it.
Three actions cannot be omitted when changing the grinding wheel
Before replacing the grinding wheel, gently tap the grinding wheel with a wooden block and listen carefully for the sound. If there is even a thin crack on the grinding wheel, the grinding wheel must be scrapped.
When tightening, it is necessary to ensure that the washers on both sides can evenly contact the end face of the grinding wheel. The clamping force at this time should be maintained at a moderate state. If you find that the clamping is too loose, the grinding wheel will fly out, and if the clamping is too tight, the grinding wheel will break. Therefore, the sense of propriety in handling strength ultimately needs to be accumulated through long-term actual operation.
During the test run, people must stand on the side of the grinding wheel. They must not stand facing the direction of the plane where the grinding wheel rotates. This is the most basic explanation of the positioning requirements in grinding machine operation. Once there is an accident at the grinding wheel, the person standing in front of him will have almost no reaction time.
Idle for three minutes before starting again
After closing the switch, run it idling for three to five minutes to see if the speed is stable and if there are any abnormal vibrations or strange sounds. Make sure everything is normal before grinding the workpiece. The feed movement must be even and cannot be pushed violently. At the same time, the workpiece must not be allowed to hit the grinding wheel.
For machine tools with a rapid feed function, a suitable distance must be maintained between the workpiece and the grinding wheel during operation, so as to avoid the blade from breaking due to sudden contact. Once the feed speed becomes too fast, the temperature of the grinding wheel will rise rapidly, and the grinding accuracy will easily deviate from the correct state.
Don’t be careless about automatic feeding and tipping
When using the automatic feeding mode, the stopper must be firmly fixed at the designed position. During the operation of the machine, it is absolutely not allowed to pull the stopper by hand. An operator at a mold factory in a certain place adjusted the position of the stop iron without authorization during operation. As a result, the workpiece was pushed in front of the grinder, which caused half of the grinding wheel to break off, eventually causing the machine to be completely scrapped.
Before each use of the alloy tip, you should take a flashlight to shine on its cone surface to see if there are any fine cracks there. For ordinary steel tips, you need to focus on whether there are any grooves on it. Because once the tip cracks, it will fly out directly when rotating at high speed, and the consequences will be very, very serious.
Pay attention to the side grinding wheel and parking
Non-dedicated side grinding wheels are absolutely not allowed to be used for side grinding of workpieces. This is because the design strength of the side cannot withstand the impact of radial cutting forces. If you really need to use the side for grinding, then you must install a special side grinding head. You must not use an ordinary grinding wheel as a substitute.
When you are ready to stop the machine after processing the workpiece, turn off the power supply and let the grinding wheel slowly decelerate and then stop. Never press the grinding wheel with your hands, or use an iron piece to jam it to force it to stop, because doing so will cause the bearing to bear excessive load in a short period of time, and the grinding wheel may crack when the machine is turned on next time.
Three taboos must be adhered to during operation
When the machine tool is rotating, people must not reach out and touch the workpiece or grinding wheel. If you want to change the workpiece, pick up the measuring tool, or leave the work place to go elsewhere, you must first turn off the power of the machine and stop the machine before you can do these actions.
There was an operator in a company who dared to reach out to hold the workpiece while the machine was still running at high speed. As a result, his fingers were accidentally caught by the rotating grinding wheel, and he had to go to the hospital for amputation surgery and lost two fingers.
During the entire process of operating the grinder, it is not necessary and prohibited to wear gloves and scarves. At the same time, long hair must be tucked into the work cap. The gloves seem to protect the hands, but if they are entangled by those rotating parts, the arms will be dragged directly in at an extremely fast speed. There is no room for negotiation regarding these three taboos.
Have you ever seen anyone in the workshop who was in serious danger because they omitted a testing step? Everyone is welcome to discuss it in the comment area and give it a like so that more people can pay attention.
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