1. technical performance standard: technical performance includes all performance of the product, including function, manufacturing and operating conditions, which refers to both static performance and dynamic performance. Such as power, efficiency, service life, strength, rigidity, friction resistance, wear resistance, vibration stability, thermal characteristics and so on. Technical performance standard means that the relevant technical performance must meet the specified requirements.
2. Standardization standards: The main standards related to mechanical product design are: concept standardization, physical form standardization and method standardization. The criterion of standardization is that all behaviors in the whole design process should meet the requirements of the above standardization. Published standards related to mechanical parts design can be divided into national standards, industry standards and enterprise standards from the scope of application. In terms of compulsory use, it can be divided into compulsory use and recommended use.
3. Reliability criterion: Reliability: the probability that a product or component will complete the specified function within the expected life under the specified use conditions. Reliability criterion means that the designed products, components or parts should meet the specified reliability requirements.
4. Safety standard: The safety of the machine includes parts safety, whole machine safety, work safety and environmental safety.
Extended data:
Mechanical design optimization requirements: Optimization design needs to comprehensively consider many requirements, generally including: the best working performance, the lowest manufacturing cost, the smallest volume and weight, the most reliable use, the lowest consumption and the least environmental pollution. These requirements are often contradictory, and their relative importance varies with different types and uses of machines. The designer's task is to weigh the weight according to the specific situation and make overall consideration, so that the designed machinery has the best comprehensive technical and economic effect.
In the past, the optimization of design mainly depended on the knowledge, experience and foresight of designers. With the development of basic theories of new disciplines such as mechanical engineering, value engineering and system analysis, the accumulation of technical and economic data for manufacturing and use, and the popularization and application of computers, optimization gradually abandons subjective judgment and relies on scientific calculation. The design of industrial machinery, especially the mechanical design of the whole and the whole system, must be attached to the relevant industrial technology and it is difficult to form an independent discipline.
Baidu Encyclopedia-Mechanical Design (Basic Meaning)