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Select The Hardness Principle Of The Cutting Piece
The hardness of the dicing sheet refers to the ease with which the abrasive grains in the dicing sheet fall off during the grinding operation, and the higher the hardness of the dicing sheet, the less likely the abrasive grains are to fall off. The hardness of the [url=https://www.auroraabrasive.com/14-inches-cutting-disc/]cutting disc for stainless steel[/url] can be generally divided into seven grades: super soft, soft, medium soft, medium, medium hard, hard and super hard. From each level, several small levels can be subdivided.
The hardness of the dicing sheet depends on the amount of the bonding agent added and the density of the dicing sheet, in addition to the type of dicing sheet constituting the dicing sheet. The cutting piece is not as hard as possible, because the abrasive grains in the cutting piece will be blunt sooner or later, and if the abrasive grain falls off at this time, the cutting piece can continue to be ground with sharp abrasive grains. . From this point of view, whether the hardness of the cutting piece is insufficient, the abrasive grains will fall off prematurely, or the hardness of the[url=https://www.auroraabrasive.com/5-inch-resin-metal-cutting-disc/]125*1*22 EN12413 cutting disc[/url] is too large, resulting in the abrasive particles falling off too late, which is not an ideal result.
When selecting the hardness of a cutting piece, generally follow this principle:
When grinding hard materials, the abrasive particles are more likely to be blunt, in order to make the blunt abrasive particles fall off in time, the cutting piece with less hardness should be selected; otherwise, the softer material should be ground. When the abrasive grains are not easily blunt, in order to maximize the service life of the cutting piece, a cutting piece having a relatively high hardness should be selected.
But this is not absolute. If the grinding workpiece is not only soft, but also has high toughness, such as non-ferrous metals such as copper and aluminum, such materials are liable to cause clogging of the cutting piece. To avoid this, you should choose a cutting piece with a lower hardness.
Further, the rotational speed of the cutting piece and the contact area with the workpiece are also factors to be considered, the cutting wire speed is low, and when the contact area with the workpiece is small, it is suitable to select a cutting piece having a relatively high hardness; The speed is high, and when the contact area with the workpiece is large, it is suitable to select a cutting piece having a small hardness.
For those workpieces with poor thermal conductivity, easy deformation and easy burn, the large heat generated during grinding, especially dry grinding, is not good for the workpiece. The [url=https://www.auroraabrasive.com/5-inch-resin-metal-cutting-disc/]5 inch resin cutting disc for metal[/url] with less hardness should be selected, on the one hand, the heat generated is lower, and the other is low. It is also possible to remove some of the heat by the shedding of the abrasive particles.
Finally, when there is a high demand for grinding efficiency, a cutting piece having a small hardness can be selected; when the roughness is required to be low, a cutting piece having a higher hardness can be selected.
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