Grinder safety technical briefing
Grinders have to deal with the grinding wheel that is rotating at high speed every day. As long as there is an oversight, it will directly lead to a big trouble that cannot be solved in a lifetime.
The specific provisions mentioned below are all actual results obtained through methods that require real money to purchase lessons. Please do not regard this process as just a formality to cope with inspections.
Status confirmation before work
Before officially taking up the job, you must ensure that you sleep for more than seven hours, and you must not operate after drinking or being tired. Grinding work inherently requires a high degree of concentration and good coordination of hands and feet. If the reaction speed is even slightly slower, the grinding wheel is likely to burst, and the workpiece is also likely to fly out and injure people.
After a person takes anti-allergic drugs or sedative drugs, the reaction ability of the nerves will become significantly worse. In this case, it is also forbidden to touch the grinder. If you feel like dozing off before going to work, don't hold on. You should report it to the team leader immediately and ask them to suspend this homework activity. This is not the kind of complaining and pretentious behavior at all, but to protect life.
Goggles are a mandatory requirement
During grinding operations, metal chips, grinding wheel particles and cutting fluid droplets move very fast, and ordinary flat mirrors cannot block the impact from the side. Therefore, you must wear anti-impact goggles or a fully enclosed mask that meet national standards. You need to seal the bridge of your nose and both sides of your ears.
In the workshop of a mechanical processing factory in 2023, a worker responsible for grinding work felt that the protective mask was too stuffy, so he took off the mask to get some air. As a result, a broken grinding wheel fragment hit his left eye, causing injuries. It later took three weeks to complete the operation.
Everyone should note that if the goggles are dirty, you only need to wipe them briefly before you can continue to wear them at work. Do not think that this process is too troublesome and ignore safety protection.
Don’t skip the safety helmet
There are cross-operation situations such as hoisting workpieces and maintenance equipment in the workshop, so the risk factor of objects falling from high altitude and parts falling off is relatively high. Therefore, when entering the work area, the chin strap of the helmet must be fastened. If it is loose, it is equivalent to not wearing a helmet.
Safety helmets have a limited service life. They usually need to be replaced after three years. If cracks in the shell or deformation of the lining are found, they must be scrapped immediately. The team leader should check the situation once a week. Once an expired hat is found, throw it directly into the garbage. Do not make do with this kind of thing.
Don’t be fooled by dust protection
After long-term inhalation of alumina dust and silicon carbide dust produced by dry grinding, these fine abrasive dust will deposit in the alveoli of the human body. If this situation is allowed to develop for many years, the patient's body will evolve into a state of silicosis.
Currently, there is no medical technology in the world that can completely cure this occupational disease. Therefore, when performing tasks related to dry grinding work, operators must correctly wear KN95 or higher protection level anti-epidemic masks throughout the process.
Masks cannot be washed with water and then used repeatedly, because once the melt-blown layer gets wet, its protective ability will be greatly reduced. In wet grinding positions, staff must also regularly test the dust concentration in the workshop. As long as the concentration exceeds the limit of two milligrams per cubic meter, the dust removal equipment must be turned on immediately.
Routine maintenance of protective equipment
If the lenses of goggles are scratched, the efficiency of light transmission will be reduced, and the field of view will become blurred. This is originally a measure to reduce risks, but in the end it increases the risks during operation. Therefore, as long as scratches are found, the lenses must be replaced on the day they are discovered.
The filter membrane inside the dust mask needs to be inspected every shift. Once it is found to have holes or a peculiar smell, it must be replaced with a new one immediately.
The workshop will uniformly purchase and distribute personal protective equipment. You must not go online to buy low-quality items to replace them. These things should be stored in a dry and ventilated place, and should be protected from being squeezed and deformed, so that their lifespan can be extended by another month or two.
Stop work immediately if abnormality is discovered
Once the grinding wheel has cracks or defects exceeding 1 mm, or the spindle makes an abnormal sound, or the workpiece is not clamped firmly, as long as any one of these conditions is met, the equipment will stop running immediately. In this case, do not think about completing the current grinding process, because if the grinding wheel bursts, the speed of the flying fragments can reach up to 80 meters per second.
After stopping work, a warning sign with the words "Equipment Maintenance" must be hung, and the team leader and maintenance master must also be notified to rush to the scene. For those who have not received special training, they are absolutely not allowed to disassemble the grinding wheel by themselves.
If a new grinding wheel part needs to be replaced, this work must be completed by two people. One of them is responsible for holding the grinding wheel steady, and the other person performs the operation.
Please explain whether there are relevant personnel in your workshop who find protective equipment troublesome and secretly take it off. Regarding this phenomenon, you are welcome to express your opinions in the comment area. If you think this answer is helpful to you, please click the like button and save it, and forward it to the grinder colleagues around you.
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