Drum brush is divided into long hair, medium hair, short hair three kinds, its performance is the length of the drum brush hair, rather than the thickness and length of the drum itself, brush hair is usually divided into wool and chemical fiber two kinds.
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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge> NSK bearing steel ball research and super fine research shortage The shortage of steel ball lapping and super-finishing in NSK bearing
NSK bearing nylon bearing frame strength and super-finishing are the final processing steps of NSK bearing steel ball; NK bearing steel ball processing higher than G40 class usually needs to use super-finishing process. End-of-scale error of steel ball, A few precisions, appearance roughness, appearance quality and burns and other skills needs; to reach the rules of the fine grinding or super-finishing process procedures. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
When looking at the diameter error and several precision of the steel ball; it is necessary to measure on the special instrument of the rule. The surface roughness and appearance quality of the workpiece after lapping are usually checked. Under the astigmatism, it is usually used for visual inspection. If there is any dispute; Double-view under the magnifying glass; and compare with the corresponding standard photo. Check the appearance quality and appearance roughness of the workpiece after super-finishing; it is necessary to extract the number of certain workpieces under the magnifying glass of 90 times and the standard photo comparison view. When visually in doubt, it can be tested on the surface roughness meter.
The method of burn inspection for fine grinding and super-finishing is to select random sampling and sampling; the quantity and quality specifications of sampling should meet the rules of burn specifications.
The reasons for the poor roughness of the steel ball in NSK bearings are:
1. The processing volume is too small; the processing time is too short.
2. The groove of the grinding disc is too shallow; the groove and the touch surface of the workpiece are too small.
3. The hardness of the grinding disc is too high or uneven hardness; and there are trachoma and pores.
4. The amount of abrasive paste is too much; or the particle size of the abrasive is too coarse.
5. The groove in the grinding disc is too dirty; there are iron filings or other debris.
Some of the reasons for the poor roughness of the surface are: the groove of the transformation grinding disc is too shallow; the touch area of ​​the workpiece is over. The lie is sturdy and obsessed with the inlaid skirt. Begging and begging.
There are also shortages in the appearance of the wounds; they often appear in the cycle processing; in the case of severe astigmatism, the pits with a certain depth can be clearly seen. Under the subtle astigmatism, only one black or yellow is seen. But at 90 Under the magnifying glass, the pits can be seen; the lower part is rough; the scratches are interlaced. The causes are: the depth of the grinding disc is different; the workpiece is in the deep groove due to the pressure. 惺蓖A粲惺Being restored to the heart, sorrowful, sorrowful, sorrowful, sorrowful
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Different rollers will brush different effects, long hair rollers will brush out some fine texture, concave and convex feeling, similar to the texture effect. The paint surface after short wool roller besmear is more uniform, smooth, without concave and convex feeling, in the wool is between the two.
Roller brush is mostly made of wool and foam plastic, which can be divided into paint drum brush, hair drawing drum brush, floor paint drum brush, flat coating drum brush, etc., mainly used for large-area paint rolling in architectural decoration engineering. And can be used for coating and rolling all kinds of paint, such as: latex paint, anti-rust paint, internal and external wall paint, wallpaper glue, etc.
Note:
The use of drum brush as long as the straight brush can be wiped, if you want to daub evenly, the drum is best in the paint bucket to be fully absorbed, and then take out a few rolling on the inclined plane, press out the excess paint and then begin to brush the wall.
Low price, good quality products, to create a perfect house decoration
The shortage of steel ball lapping and super-finishing in NSK bearing
Source: China Bearing Network Time: 2013-08-16