51 seamless steel pipe network provides: Shandong 45 # seamless steel pipe use
[sd seamless steel pipe plant] Shandong 45 # seamless steel pipe use
45# seamless steel pipe is widely used in chemical industry, petroleum, textile, medical, food, machinery and other industries. . First, the function of shaft parts, structural characteristics and technical requirements Shaft parts are often encountered in the machine one of the typical parts. It is mainly used to support transmission parts, transmit torque and bear load. Shaft parts are rotating parts, whose length is greater than the diameter, generally consisting of the outer cylindrical surface, conical surface, inner bore and threads of the concentric shaft and the corresponding end face. According to different structural shapes, shaft parts can be divided into optical axis, stepped shaft, hollow shaft and crankshaft. Shafts with an aspect ratio of less than 5 are called minor axes, and those with diameters greater than 20 are called elongated shafts, with most of the axes in between. Shandong Seamless Steel Tube Factory is a professional manufacturer of seamless steel pipe, high quality and low price, stock, Wanli Hong Seamless Steel Tube Factory (Shandong Seamless Steel Tube Factory) welcome friends from all walks of life come to order negotiations, hotline:. The shaft is supported by a bearing and the shaft section that matches the bearing is called a journal. Shafts are shaft assembly standards. Their accuracy and surface quality are generally higher. Their technical requirements are generally based on the main functions and working conditions of the shaft. There are usually the following: (1) Shaft journals that support the dimensional accuracy In order to determine the position of the shaft, its dimensional accuracy is usually high (IT5 to IT7). The precision of the journal size of the assembled transmission is generally lower (IT6~IT9). (2) Geometrical accuracy The geometric accuracy of shaft parts mainly refers to the roundness, cylindricity, etc. of the journal, outer taper, Morse taper, etc. Generally, its tolerance should be limited within the range of dimensional tolerances. The surface of the inner and outer circles that require high precision shall be marked on the drawing to allow deviations. (iii) Mutual Positional Accuracy The positional accuracy of shaft parts is mainly determined by the position and function of the shaft in the machine. It is usually necessary to ensure the coaxiality of the shaft journal of the assembly transmission to the supporting journal. Otherwise, it will affect the transmission precision of the transmission (gear, etc.) and generate noise. For an axis of normal accuracy, the radial runout of the supporting shaft journal with the matching shaft section is generally 0.01-0.03 mm, and the high-precision shaft (such as the main shaft) is usually 0.001-0.005 mm. (4) The surface roughness of the surface roughness generally matched with the transmission member is Ra2.5-0.63 μm, and the surface roughness of the bearing shaft matched with the bearing is Ra0.63-0.16 μm. Second, the shaft parts of the blanks and materials (A) shaft parts of the blank shaft parts can be based on the use of requirements, production type, equipment conditions and structure, choose bar, forgings and other rough form.
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