Questions and Answers on Abrasive Wire Brushing_FAQ

Meixin Brush Factory introduces abrasive wire mainly used for processing and making polishing and polishing brushes. It is a special-made brush, which is widely used in woodworking and furniture industry, steel, iron, non-ferrous metal factories, PCB (electronic circuit board), automobile and motorcycle industries. , Textile industry, metal processing industry and many other industries. The so-called abrasive filaments refer to nylon filaments added with abrasives such as silicon carbide (SIC) or alumina (AO).　　 Why use nylon 612? Nylon 612 has good corrosion resistance and good bending recovery ability; compared with nylon 6, nylon 66 and nylon 610, nylon 612 has a lower water absorption rate, so that it can still maintain a greater hardness in a humid environment ; In terms of material density, nylon 612 is also relatively low, thus reducing costs; and because nylon 612 is 100% petrochemical polymer, it ensures the consistency of quality.　　Why use wavy brush filaments?　　 1. The wave shape can enhance the elasticity of the brush wire and ensure the excellent grinding and polishing effect. 2. Separate the bristles from each other and spread them more evenly on the surface of the workpiece to be polished. 3. Enhance the hardness of the brush wire, improve the grinding and polishing efficiency, reduce the possibility of deformation or even breakage of the brush wire due to excessive stress, and ensure the maximum service life of the abrasive disc brush.　　Is it possible to extend the service life of the brush by increasing the height of the brush wire? Can not. Because the life of the brush depends on the production process, the quality of the brush wire and the correct method of use. If the height of the brush wire is increased blindly, the rigidity of the brush wire will not be guaranteed, and the brush wire will fall sideways when working. At this time, the contact surface with the workpiece becomes the vertical surface of the brush wire instead of the end surface, which leads to the middle of the brush wire. It gradually becomes thinner, and finally causes abnormal breakage of the brush filament. It shortens the service life.　　How to distinguish the pros and cons of brushes? What is a high-quality abrasive brush?　　 1. The wire of the brush should not fall off during the working process.　　2. The brush wire in the brush base should be fixed with high-strength stainless steel to prevent corrosion.　　3. Using wavy curved brush wire.　　4. The abrasive sand in the brush wire should not fall off due to the bending of the brush wire.　　 5. Reasonable brush wire height and density.　　6. u200bu200bThe brush wire should have high hardness and toughness in a humid environment.　　 7. The brush wire should have good bending recovery.　　 8. The brush wire should have good abrasion resistance. 2. Explore the technology of abrasive brush filaments. The so-called abrasive filaments refer to nylon filaments added with abrasives such as silicon carbide (SIC) or aluminum oxide (AO). As a new type of brush-making material, most of them are currently used in the manufacture of polishing brushes and polishing brushes. Wait. But it is precisely because it is an emerging brush-making material that many brush-making companies do not have a deep understanding of it. Sometimes, in order to make up for the lack of a certain function of the abrasive brush wire, a single change is taken for granted, which seems to be solved on the surface. Problems, in fact, bring more new problems. This article is from Brush, please indicate the source for reprinting, thank you. To sum up, most brush-making companies have the following changes: thickening the wire diameter, increasing the length of the brush wire, changing to thicker abrasives, and so on. The following analyzes the shortcomings of these practices one by one.　　 Silicon carbide-containing abrasive wire 　　 1. Thicker wire diameter 　　 1. I believe that many brush manufacturers believe that thickening the wire diameter can increase the hardness and enhance the cutting force. In fact, this is not the case, because the hardness and flexibility of the real high-quality abrasive wire have a perfect balance: the appropriate hardness makes the product have good rigidity, and the workpiece can be well contacted and ground; the appropriate flexibility makes The brush has good resilience, which not only ensures the machining accuracy of the workpiece surface, but also reduces the wear and internal stress of the brush during the grinding operation, thereby increasing the service life of the brush without breaking the wire. This article is from Brush, please indicate the source for reprinting, thank you.　　2. Tests have shown that: when all the conditions are the same but the wire diameter is different, the abrasion of 14mm is twice that of 12mm wire.　　3. The main problems caused by thicker wire diameter are: reduced density of brush wire, lower fatigue resistance, faster wear, shorter service life, increased grinding stress, and easier wire breakage.　　 Therefore, the correct approach is to use a thinner wire diameter as much as possible on the premise that the hardness of the brush can meet the process requirements.　　Second, increase the length of the brush wire. 　　 Brush manufacturers generally believe that scrapped brushes are because the brush bristles are worn short, so longer the brush wire, the softness is better, and the durability should be longer and better. Actually, this made a big mistake. Because the real work is not the tangent surface of the brush wire, but the side surface of the brush wire during the polishing and polishing process, the length of the brush wire is increased one-sidedly, and the swing range (angle) of each wire is also greatly increased, at 800-2500 speed/ Under the condition of minutes, the internal stress and fatigue coefficient of the base of the brush filaments will increase exponentially, causing the abrasive brush filaments to be easily broken and the filaments to be deformed. 3. Switching to coarser abrasive grains to use coarser abrasive grains, the intention is to increase the cutting force, this is understandable, but in the case of little change in particle size, the effect of simply increasing the abrasive grains is almost negligible On the contrary, there may be some negative effects, because when the brush swings, the abrasive will produce a shear on the brush wire itself. The larger the angle of the brush wire swing, the more obvious it is. The test proved that after the 120# and 180# abrasive filaments were folded in half for 30 times, the 120# abrasive filament could see obvious cracks under the microscope, while the 180# did not. 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. Welcome to www.mxbrushmachinery.com