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xzbbvfvbh wrote 12 articles and got 0 comments. The last article was submitted on 21/01/19

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Prevent cutting blades from grinding burns

Date 09/01/19 04:37 Views 14 Сomments 0

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Picture The grinding of the cutting piece is caused by the excessive temperature of the grinding zone of the <strong><a href="www.auroraabrasive.com EN12413 cutting discs</a></strong>. Therefore, it is generally possible to reduce the grinding by reducing the heat generated by the cutting piece and minimizing the heat generated by the surface of the workpiece. Cut the burn.
Reasonably choose the amount of grinding of the cutting piece. The grinding temperature of the cutting piece rises correspondingly, and the burn is prone to occur; the larger the surface temperature of the workpiece is, the higher the surface temperature is. The increase in energy during sliding and scoring during grinding increases the surface burn and causes an increase in heat to reduce burns and cracks on the surface of the workpiece.
Correctly select the cutting piece. The use of coarser abrasive grains, coarse dressing, lowering the hardness of the grinding wheel, controlling the wear of the grinding wheel and preventing the grinding wheel from sticking and clogging can effectively reduce the grinding temperature. The most influential is the reasonable choice of the hardness of the grinding wheel. When grinding materials with poor thermal conductivity, hollow thin-walled parts and workpieces with long arc contact with the grinding wheel, softer grinding wheels should be used to play the self-sharpening effect of the grinding wheel. In the case where the grinding heat is large and the contact area between the grinding wheel and the workpiece is large, the atmospheric hole grinding wheel or the surface grooved grinding wheel can be used, so that the grinding wheel is not easy to block, the cutting ability is enhanced, and the heat dissipation is accelerated.
The surface of the workpiece is easily burned
Such alloy steel has high hardness, large directionality, large chip deformation, large cutting resistance and high output. Because of the poor thermal conductivity of the material, the grinding zone generates a large amount of heat and cannot be quickly transferred out, resulting in a particularly high temperature in the grinding zone. It is prone to surface burns.
Super thin slices are easy to block
When the material is ground, the chips are easily adhered to the surface of the ultra-thin sheet, so that the ultra-thin sheet loses the <strong><a href="www.auroraabrasive.com cutting disc for metal</a></strong> and is not easily removed from the abrasive grains. The ultra-thin sheet is clogged, the ultra-thin sheet is rubbed against the workpiece, and the grinding temperature rises sharply to cause the workpiece to burn.
The workpiece is easily deformed
Grinding these hard-to-wear materials is easier to deform than other steels. Due to the strong work hardening tendency of alloy steel materials, residual stress is easily generated on the surface of the workpiece during processing. In
During the post-processing, the workpiece is deformed due to changes in the stress state. For example, the stainless steel slender shaft is ground and turned into a waist drum shape and twisted; the sheet workpiece is warped; the diameter of the workpiece is worn, and an ellipse is easily generated.
Cold and hard
Due to the severe extrusion and friction phenomena in the grinding, the work hardening tendency of the alloy steel material is enhanced. Therefore, the chilling phenomenon of grinding the surface layer is more serious. It also causes annealing on the surface of the workpiece.

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