Steel Plate, according to the thickness can be divided into
thin plate and thick plate,
thin plate is widely used on Automobile
industry,aircraft industry,enamel industry,electrical industry,mechanical
industry. Thick plate according to usage can divided into ship building
plate,bridge plate,boiler plate,high pressure vessel plate,automobile plate,armor plate,clad
steel plate,etc.
Steel plate is flat, rectangular, can be rolled directly or by a wide strip of steel. Steel Plate Steel Flat Plate,Steel Plate,Mild Steel Plate,Carbon Steel Plate TIANJIN ZHENXIANG STRIP PROCESSING CO., LTD. , http://www.zhenxiangsteel.com
/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>Analysis of the rolling noise of NSK bearings in Japan Analysis of the Rolling Noise of NSK Bearings in Japan
In the process of using NSK bearings; often encounter a variety of noise. Today we will analyze the noise that is not often found: the rolling sound. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
The rolling sound is due to the fact that the rolling element rolls over the raceway when the bearing rotates, and it announces a smooth and continuous noise; only when its sound pressure level or cavity is extremely large, it leads to everyone's attention. In fact, the sound of the rolling track is aroused. Sound energy is limited; as in normal conditions; the quality of the 6203 bearing raceway is 25 to 27 dB. This noise is most typical for single row deep groove ball bearings that accept radial loads; it has the following features:
a. Noise and oscillation are random,
b. The oscillation frequency is above 1 kHz.
c. No matter how the speed changes, the main frequency of the noise is almost constant and the sound pressure level is improved with the addition of the speed.
d. When the radial clearance increases; the sound pressure level is sharply added,
e. The rigidity of the bearing housing increases; the lower the total sound pressure level; even if the speed increases, the total sound pressure level is not added much.
f. The higher the viscosity of the smoothing agent; the lower the sound pressure level; but the smoothness of the grease; the viscosity and the shape of the soap fiber can affect the noise value.
The source of the raceway sound is caused by the natural oscillation of the ferrule after the load. Because the elastic touch of the ferrule and the tumbling body constitutes a nonlinear oscillating system. When the smoothness or the machining precision is not high, the elastic characteristic is aroused. Related natural oscillations; it becomes noise when transmitted to the air. It is well known; even if the world's most brilliant production skills are used to process bearing parts; there will always be a few minor errors in the operation appearance; thus the raceway and rollover Small movements between the bodies provoke the natural oscillation of the oscillation system.
Although the raceway noise of the NSK bearing is unavoidable, it can adopt the high-precision machining parts to work externally; correctly select the bearing and accurately use the bearing to reduce noise and vibration.
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Steel plate by thickness, thin steel plate <4 mm (thinnest 0.2 mm), thick steel plate 4~60 mm, 60~115 mm thick steel plate.
The plate is divided into hot rolling and cold rolling.
The width of the sheet is 500~1500 mm and the thickness is 600~3000 mm. According to the type of steel sheet, ordinary steel, stainless steel, alloy steel, spring steel, stainless steel, tool steel, heat-resistant steel, bearing steel, silicon steel and industrial pure iron sheet; according to professional use, with drums board, enamel board, bulletproof plate; surface coating and plating, plating with zinc thin plate, tin plate, plating lead sheet, plastic composite plate.
Source: China Bearing Network Time: 2013-08-13