Analysis: Influencing factors and noise reduction of ball mill ball bearings

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Analysis: Influencing factors and noise reduction of ball mill ball bearings

Source: Bearing network time: 2018-01-28
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Many experiments in the national watch indicate that the processing quality of the cage, the ferrule and the steel ball have different effects on the bearing oscillation; the processing quality of the steel ball has the most significant influence on the bearing oscillation; the second is the processing quality of the ferrule; The most important influencing factors are the roundness, waviness, appearance roughness, and appearance of steel balls and ferrules.
The most outstanding problem of China's steel ball products is that the oscillation value is discrete; the external defects are severe (single point, group point, pit, etc.); although the appearance roughness, scale, shape, and error are not lower than the circle level; The rear bearing has a high oscillation value; even an abnormal sound occurs; the first problem is that the waviness is not manipulated (no specification, no suitable profiling instrument); together, the vibration resistance of the machine tool is poor; the grinding wheel, the grinding disc, the coolant, and the process parameters are all difficult. On the other hand, we must improve the management level; prevent accidental quality problems such as bruises, scratches, burns, etc.
Regarding the ferrule; the most severe impact on the bearing oscillation is the channel waviness and appearance roughness. For example; when the circularity of the channel in the small and medium-sized deep groove ball bearing is greater than 2μm; it will have a significant impact on the bearing oscillation; When the waviness of the track is greater than 0. 7μm; the bearing oscillation value is added with the addition of waviness; the severe channel damage can increase the oscillation by more than 4dB;
Whether the steel ball is still a ferrule; the waviness occurs in the grinding process; although the ultra-finishing can improve the waviness and reduce the roughness; the most basic method is to reduce the waviness during the grinding process; prevent random Sexual bruises; there are two main ways:
The first is to reduce the oscillation of the super-fine grinding when the surface is tumbling; to obtain outstanding surface shape accuracy and appearance texture as the downward oscillation; it is necessary to have excellent vibration resistance for the grinding machine; the important layout parts such as the bed have vibration absorption; The oil stone oscillating system of the ultra-precision machine tool has outstanding anti-vibration function and improves the grinding speed; the foreign grinding 6202 outer raceway uses 60,000 electric spindles; the grinding speed is more than 60m/s; the domestic is usually much lower; And the main bearing function constraints. In high-speed grinding; grinding force. ハ鞅 惚 惚 蝗菀 蝗菀 蝗菀 蝗菀 耍 耍 耍 耍 耍 蝗菀 蝗菀 蝗菀 蝗菀 蝗菀 蝗菀 蝗菀 蝗菀 蝗菀 蝗菀 蝗菀 蝗菀 蝗菀 蝗菀 蝗菀岫 岫 岫 斩 斩 捌渌俣 捌渌俣 捌渌俣 匦 匦 匦 匦 ハ髡穸跋旌艽螅桓斩 ハ髡穸跋旌艽螅桓斩 ハ髡穸跋旌艽螅桓斩 ハ髡穸跋旌艽螅桓斩 ハ髡穸跋旌艽螅桓斩 ハ髡穸跋旌艽螅桓斩 ハ髡穸跋旌艽螅桓斩 ハ髁 ハ髁 ハ髁 ハ髁 浠 浠 浠 浠 浠 浠 浠 浠 浠 浠Called. 惶岣咧 嶂岢 嶂岢 嶂岢 Ц Ц Ц Ц Ц Ц Ц Ц Ц 裥 裥 裥 裥 裥 裥 裥 裥 裥 裥 裥 裥 裥 裥 裥 裥 裥 裥 裥 裥 裥 国外 裥 裥 国外 国外 国外 裥 国外. The cutting function and finishing quality of the progressive grinding wheel are essential. The main problem of the current grinding wheel in China is Poor layout uniformity; severely affect the low-noise ball bearing grinding super processing quality, abundant cooling; improve the filtration accuracy, improve the feed resolution of the system; reduce the feed inertia, reasonable grinding process parameters and processing flow is not acceptable Ignore the elements; grinding and retention. Laos also friends, Xi Huixing, 饩恫 饩恫 擞 擞 淮 淮 淮 淮 淮 淮 淮 淮 淮 淮 淮 淮 淮 淮 淮 淮 淮 淮 淮 淮 淮 淮 .
The second is to improve the precision of the machining reference surface; the error re-imaging outer diameter and the end surface in the falling grinding super-processing process are the positioning reference in the grinding super-processing process. The outer diameter-to-channel super-precision error mapping is through the outer diameter to the groove grinding Ditch grinding directly transmits the error of the groove super. If the workpiece is bumped during the transfer process, it will be directly reflected on the outer surface of the raceway; affecting the bearing oscillation. Therefore, it is necessary to adopt the following method: improve the positioning of the reference appearance Shape accuracy, smooth transfer during processing; flawless bump, blank blank position error can not be too large; especially when the retention is small; excessive error will form the end of the final and superfine end of the shape accuracy is not improved to the end of the quality Demand; severely affect the consistency of processing quality.
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