Tungsten Carbide Blade Grinding Crack’s Prevention I

By processing practice, summed up the negative edge sharpening method can effectively prevent or reduce tungsten carbide blade grinding crack sharpening process.

The negative edge sharpening method is in front of the sharpening knives , firstly the surface of the rake face or knife blade grind a negative band. Tungsten carbide materials are brittle, because while the grinding wheel that the tool vibration impact loads, vibration prone to cracking; Meanwhile, instant heating and cooling of the grinding zone thermal stress may exceed the ultimate strength of cemented carbide and thermal cracking . Using negative edge blade sharpening method can improve the strength and enhance the capacity of the blade vibration and shock loads and increases heated area to prevent a large number of guide blade grinding heat, thereby reducing or preventing cracks.

 

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