Puša prestavne ročice iz aluminijeve zlitine

Zahteva glede življenjske dobe je, da deli vzdržujejo normalno delovanje v pričakovanem delovnem obdobju, ne da bi bili razrezani. Ta zahteva velja predvsem za tiste dele, ki so obrabljeni ali korodirani pri delu pod spremenljivo obremenitvijo in med delom.

As the main factors affecting the fatigue limit of parts and materials are stress concentration, size, surface quality and environmental conditions, the main measures to improve the life of parts are: ① properly involving the structure of the part to reduce the degree of stress concentration; ② using processing or surface strengthening treatment Improve the quality of the working surface of the parts; ③ Reasonably choose the friction pairing materials, lubricants and lubrication methods to improve the wear resistance of the parts; ④ Choose corrosion-resistant materials to make parts that work in corrosive media; ⑤ Use heat treatment to improve the mechanical parts of the parts Performance, or use rolling, shot peening and other processes to generate favorable residual stress on the surface of the part, etc.

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