What are the basic criteria for the design of mechanical parts?
1, first of all, to distinguish the old machine parts of the work equipment safety and health requirements(1) reasonable mechanical structure type. The intended function structure of mechanical equipment must be suitable for their implementation, not the normal operation of mechanical barrier, jammed or loose due to the unreasonable structural design; not because of the component or software defects caused by data loss or not any machine; design and mechanical equipment can be expected to not reasonable related events.
2. reliable and effective safety protectionAny job of dismantling an old machine is in such a danger that the risk of environmental conditions and the performance of the operator in a dynamic combination is greater when it comes to dismantling the parts of an old machine. As long as there is danger, even if the operator has good technical training and safety education, there are perfect procedures, but also can not completely avoid the risk of mechanical injury accidents. Therefore, a reliable material barrier must be established, that is, to install one or more protective devices, safety devices or other safety measures that are specifically designed to protect the safety of persons. When the equipment or operation of some aspects of the problem, relying on the mechanical safety of their own technical measures to avoid accidents, and ensure the safety of personnel and equipment. Equipment with high risk or high accident rate must be equipped with safety protection device.
(2) the demolition of the old machine parts of the work, the stress components and their connections, should meet a predetermined maximum load enough strength, stiffness and stability during normal operation should not occur due to the work cycle or stress or fatigue fracture times have broken, excessive deformation or collapse; also must considering the stability of the whole mechanical equipment under the premise of the anti overturning wind or anti slide, especially those with mechanical vibration displacement load or its expected quality uneven distribution.(3) adequate adaptability to the use of the environment. The work equipment of the demolition of the old machine parts must be used to the environment (such as temperature, humidity, air pressure, wind load, snow load, vibration, and electrostatic, magnetic and electric fields, radiation, dust, microorganism, animal and corrosive medium) has enough ability to adapt, especially anti corrosion or erosion, aging wear, anti-interference ability, not because the electrical components affect the physical, chemical and biological caused by accident.
