Exploration of Abrasive Wire Brush Technology_FAQ

At present, some Anhui Meixin brush factories make single changes in order to make up for the lack of a certain function of the abrasive brush, such as: thickening the wire diameter, changing to a thicker abrasive, extending the length of the brush wire, etc., although it is solved on the surface Problems have brought more new problems, such as: 　　1, thickening the wire diameter (1) The user's intention is obvious, thickening the wire diameter is to increase the hardness and increase the cutting force. However, for real high-quality abrasive filaments, hardness and flexibility can achieve a perfect balance: the appropriate hardness makes the product have good rigidity, and it can contact and grind the workpiece well; the appropriate flexibility makes the brush have good resilience , Which not only guarantees the machining accuracy of the workpiece surface, but also reduces the wear and internal stress in the brush grinding operation, thereby increasing the service life of the brush without breaking the wire. (2) Tests have shown that when all the conditions are the same but the wire diameter is different, the abrasion of 14mil is twice that of 12mil brush wire. The main problems caused by thicker wire diameter are: the density of the brush wire is reduced, and the fatigue resistance is reduced. , The wear is faster, the service life is shorter, the grinding stress is increased, and the wire is more likely to break. (3) What is correct is that the wire diameter should be as thin as possible under the premise that the hardness of the brush can meet the process requirements.　　2, lengthen the length of the brush filaments　　 users feel that the scrapped brushes are bristles that are worn short, and the longer the brush filaments have better softness and better durability. This made a major mistake! The bristles are lengthened. The bristles are not working on the cut surface, but on the side of the bristles. What's more terrible is that the swing range (angle) of each wire is greatly increased (see Figure 1). At 800-2500 rpm, The internal stress and fatigue coefficient of the brush filament base increase exponentially, causing the abrasive brush filaments to be easily broken and the filaments to be deformed significantly. Note: When the correct length of the brush wire is 8CM, the swing range of the brush wire is about 25 degrees, and the length of the brush wire is about 1CM, and the angle is increased by about 10 degrees. The internal stress and fatigue coefficient of the root of the brush wire increase exponentially. 3. The user’s intention to switch to coarser abrasive grains is to increase the cutting force. It can be understood that if the particle size changes little, it can be almost ignored, and there may be a small amount of side effect, because the abrasive will affect the brush filaments when the brush is swinging. A shear is generated by itself, and the larger the angle of the brush wire swing, the more obvious it is. For example: comparing #120 with #180 test, after repeated folding in half for 30 times, #120 abrasive wire can see obvious cracks under the microscope, but #180 did not find it. Although this double-folding experiment has increased the difference, the reason is the same. The coarser abrasive grains cut the brush filaments more severely during the running of the brush.　　 Abrasive wire is a special product. Any single innovation is accompanied by risks. If you really think that a certain function needs to be improved, please contact us, and we will suggest solutions from the brushing aspect. Each innovation requires repeated trials and comparisons before it can be used in large quantities, because a quality accident is enough to ruin the trust of customers, please be cautious! At present, the problem of insufficient cutting force of domestic abrasive wire is more obvious. Therefore, the coarse wire diameter is adjusted. There is no difference, please rest assured to adopt. Welcome to www.mxbrushmachinery.com