Processing technology and common process equipment

2022-10-20
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Shaft parts processing technology and common process equipment

I. the function of shaft parts and we are still developing more new TPE product structural features

shaft parts are mainly used to support transmission parts (gears, pulleys, etc.), bear load, transmit torque and ensure the rotation accuracy of parts installed on the shaft

according to the structural shape of the shaft, the classification of the shaft is shown in Figure 61

according to the ratio of shaft length L to diameter D, it can be divided into rigid shaft (l/d 12) and flexible shaft to accelerate the implementation of the company's development strategy (l/d> 12)

shaft parts are usually composed of inner and outer cylindrical surfaces, inner and outer conical surfaces, end faces, step surfaces, threads, keyways, splines, transverse holes and grooves

II. Technical requirements, materials and blanks of shaft parts

the surface of the journal with bearings and the shaft head with transmission parts is generally an important surface of shaft parts. Its dimensional accuracy, shape accuracy (roundness, cylindricity, etc.), position accuracy (coaxiality, perpendicularity with the end face, etc.) and surface roughness are particularly high. The first point is that when formulating the machining process specification of shaft parts, Factors that should be taken into account

45 steel is often used for general shaft parts; 40Cr can be used for shafts with medium precision and high speed; For shafts working under high-speed and heavy load conditions, 20 low-carbon alloy steels such as Cr and 20CrMnTi can be selected for carburizing and quenching, or 38CrMoAlA nitriding steel can be used for nitriding treatment

round bars and forgings are the most commonly used blanks for shaft parts. Only some large and complex shafts use castings (cast steel or ductile iron)

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