Machinery manufacturing industry is the basis of various industries, involving a wide range of employees a large number. These include casting, forging, heat treatment, mechanical processing and assembly processes, and there are various occupational hazard factors in these processes, but also there are various hazards of mechanical equipment.
Mechanical processing equipment is the basic equipment of mechanical processing in various industries, mainly including metal cutting machine tools, forging machinery, punching, shearing and pressing machinery, lifting machinery, casting machinery, woodworking machinery, etc.
In the process of mechanical equipment performing its function under specified conditions of use, as well as in transportation, installation, adjustment, maintenance, disassembly and treatment, no matter in which stage, in which state, there are dangerous and harmful factors, which may cause harm to the operator.
(1) Danger existing in normal working state
Mechanical equipment in the normal working state of the completion of the scheduled function, there are inevitable but it is necessary to perform the scheduled function of motion elements, and may cause harm. Such as the relative movement of parts, the rotation of the tool, the noise and vibration of the mechanical operation, so that the mechanical equipment in the normal working state of collision, cutting, operating environment deterioration and other adverse risk factors for the safety of the operator.
(2) The danger of abnormal working conditions
In the process of mechanical equipment operation, due to various reasons caused by the unexpected state, including failure state and maintenance state. Equipment failure may not only cause partial or complete machine shutdown, but also pose a threat to the safety of the operator. For example, the grinding wheel in operation will fly out of the grinding wheel and cause an object strike accident. Failure of electrical switches creates a danger that mechanical equipment cannot be stopped. The maintenance of mechanical equipment is generally carried out in the shutdown state, because the need for maintenance often forces maintenance personnel to adopt some special practices, such as climbing, into a narrow or almost closed space, the removal of safety devices, so that the maintenance and repair process is prone to normal operation does not exist.