Non-metallic materials for mechanical parts

rubber

Rubber is rich in elasticity and can absorb more impact energy. It is often used as elastic components of couplings or shock absorbers, belt transmission belts, etc. Hard rubber can be used to make water-lubricated bearing bushes.

plastic

The specific gravity of plastic is small, and it is easy to make parts with complex shapes, and various plastics have different characteristics, such as corrosion resistance, heat insulation, insulation, friction reduction, and large friction coefficient, so in recent years, in machinery manufacturing Its application is becoming more and more extensive. Plastics made of wood chips, asbestos fibers, etc. as fillers and pressed with thermosetting resins are called bonded plastics, which can be used to make instrument brackets, handles and other parts that are not stressed. Laminated plastics are plastics made of layered fillers such as cloth, asbestos, and thin wood boards, and pressed with thermosetting resins. They can be used to make silent gears, bearing villages, and friction plates. When designing mechanical parts, choosing the right material is a complex techno-economic issue. Designers should make comprehensive considerations based on the use of parts, working conditions, physical, chemical, mechanical and process properties of materials, and economic factors. This requires designers to have extensive knowledge and practical experience in materials and processes. The above are just some rough descriptions. The chemical composition and mechanical properties of various materials can be found in relevant national standards, industry standards and mechanical design manuals.