Identification of dangerous factors in the process

2022-08-12
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Identification of abrasive processing risk factors

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due to the special structure of abrasive tools and the special processing method of grinding, the existing risk factors endanger the safety and health of operators

1. Mechanical injury. Mechanical injury refers to the injury caused by the contact and collision between the grinding machine itself, the grinding tool or the ground workpiece and the operator. For example, the contact between personnel and the moving parts of grinding machinery causes injury, the contact with the rough surface of abrasive tools causes abrasion, and the processing parts that are not firmly clamped throw out to hurt people. It is the most serious injury accident of grinding machinery to hit people by flying fragments after the destruction of high-speed grinding tools

2. Noise hazard. Grinding machinery is a high-noise machine, and the grinding noise comes from the combined action of many factors. In addition to the noise of the transmission system of the grinding machinery itself, the noise of the exhaust system of dry grinding and the noise of the cooling system of wet grinding, the high specific energy and high speed of grinding processing are the main reasons for the grinding noise. In particular, it can replace lead-acid batteries and lithium batteries. It is rough grinding, cutting, polishing and sheet grinding operations, as well as the use of pneumatic grinder. The noise is even greater, sometimes as high as 115dB (a), damaging the operator's hearing

3. Dust hazard. Grinding is micro cutting, and small cutting, especially the self sharpening effect of abrasive tools and the dressing of abrasive tools, will produce a lot of dust. According to the measurement, the dust produced by dry grinding is less than 5 μ M particles account for 90% on average. Long term inhalation of grinding dust will lead to pulmonary fibrosis and pneumoconiosis

4. The consumption demand of grinding shows the harm of rigid cutting fluid. The use of grinding fluid in wet grinding plays an important role in improving the heat dissipation conditions of grinding, preventing burns and cracks on the surface of the workpiece, washing and grinding, reducing friction and dust. However, long-term contact with grinding fluid can cause dermatitis; There are certain differences in oil-based data. The atomization of grinding fluid will damage human respiratory organs; Improper selection of the type of grinding fluid will erode the abrasive, reduce its strength, and enhance the risk of abrasive damage; If wet grinding and electrolytic grinding are not managed properly, the safety of electrical equipment will be affected

5. Ignition hazard. Inflammable and explosive diluents, oil-based grinding fluids and their atomization and grinding cremation are unsafe factors causing fires

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