1. Precision parts brief introduction:
Parts are the basic components of a machine. The machine typically consists of one or more transmission parts (such as electric motors, internal combustion engines, steam engines) that accept external energy sources; an executive part (such as a tool in a machine) that implements the machine's production function and transmits the motive force and motive force of the prime mover to the executive part (Such as the machine gear and screw drive mechanism), to ensure that all parts of the machine coordinate the work of the detection and control system (such as CNC machine tools) constitute (that is, the machine construction from the original moving parts, transmission parts, the implementation of the part, Measurement and control part). The machine for further decomposition, you can get all kinds of parts.
Parts are the basic elements that make up a machine and can be broadly divided into two broad categories: parts that can be used in a variety of machines (such as gears, shafts, etc.) called standard parts; The parts (such as bolts, propellers, etc.) that are used in machines of a type are called special parts. Others as Parts assemblies or assemblies are for coordination work (such as couplings, decelerators etc.)
2. precision parts strength requirements:
Strength refers to the ability of the part to not break or not to plastically deform beyond the allowable limits at work, which is the most basic requirement for the normal operation and safety of the machine.
Measures to improve the strength of the parts are: ① increase the size of the dangerous part of the part, the rational design of the cross-sectional shape to increase the section moment of inertia; ② using high-strength materials, materials to improve the strength and reduce the stress of the heat treatment, control Processing technology to reduce or eliminate microscopic defects, etc.; (3) strive to reduce the load on the parts; (4) properly involved in the structure of the parts to reduce the degree of stress concentration.