Micro shaft: What are the high quality selection criteria for shaft machining? Rotor shaft-rotating shaft
micro shaftWith the progress of society and the progress of science, our technicians have invented many kinds of products for us to use. Printer output shaft processing is one of them. So, what are the quality selection criteria for shaft machining? LetXiaobianFor usExplain in detail!
Three and recommendWhat are the high quality selection criteria for shaft machining?
1.The material of the shaft is mainly carbon steel and alloy steel. Commonly used carbon steel is45Steel, it should be normalized or quenched and tempered to improve its mechanical properties. Alloy steel has higher mechanical properties and heat treatment properties than carbon steel, but it is more sensitive to stress concentration and has a higher price. Therefore, it is mainly used for high speed, heavy duty and special conditions, such as wear resistance, high temperature or low temperature.. Since the difference between the elastic modulus of alloy steel and carbon steel at room temperature is small, replacing carbon steel with alloy steel cannot significantly improve the stiffness of the shaft.
2.Alloy steel can be used for shafts that withstand large loads, require high strength, compact structure or good wear resistance. Commonly used are40Cr,20Cr,35SiMnWait. It should be noted that when the dimensions are the same, the use of alloy steel cannot improve the stiffness of the shaft, because in general, the elastic modulus of various steels is similar. Alloy steel is more sensitive to stress concentration, so the structural design of the shaft is more important. Pay attention to reduce the influence of stress concentration; when using alloy steel, corresponding heat treatment must be carried out to better exert the performance of the material.
3.Axle blanks are usually hot-rolled round steel or forgings. For shafts with complex shapes, such as crankshafts and camshafts, cast steel or ductile iron can also be used. The latter has the advantages of good vibration absorption, low sensitivity to stress concentration and low price.
The shaft is a cylindrical object that passes through the middle of the bearing, the middle of the wheel or the middle of the gear, but a small part is square. A shaft is a mechanical part that supports a rotating part and rotates with it to transmit motion, torque or bending moment. It is generally in the shape of a metal round bar, and each section may have a different diameter. The rotating parts of the machine are mounted on shafts. According to the shape of the shaft, the shaft can be divided into two types: crankshaft and straight shaft. According to the bearing condition of the shaft, it can be divided into: rotating shaft, spindle and drive shaft. The structural design of the shaft is an important step to determine the reasonable shape and overall structural size of the shaft. From the type, size and position of the parts installed on the shaft, the way the parts are fixed, the nature, direction, size and distribution of the load, the type and size of the bearing, the shaft blank, the manufacturing and assembly process, the installation and transportation, and the shaft and other deformation factors. Designers can design according to the specific requirements of the shaft and compare several schemes when necessary to select the best design scheme.
Micro shaft, rotor shaft, rotating shaft
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2024-01-02
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