Common Types of Carbide Blade Wear

As we all know, cemented carbide tools' wear and tear will cause difficulty in regrinding and affect the machining quality of precision parts. Due to different materials of workpiece and cutting materials, the common carbide cutting tool wears in the following three situations.

1. Wear on the back side of the blade

This wear generally occurs when cutting brittle metal or cutting plastic metal at a lower cutting speed and a smaller cutting thickness (αc < 0.1mm). At this time, the mechanical friction on the front side of the blade is small and the temperature is low, so the wear on the back side of the blade is large.

2. Wear on the front side of the blade

Wear on the front side of the blade occurs when cutting plastic metal at high cutting speed and large cutting thickness (αc > 0.5mm), Due to friction, high temperature, and high pressure, the chips are ground near the cutting edge on the front side of the blade and creates defect one edge of the blade. During the machining of precision parts, the defect gradually deepens and widens, and expands in the direction of the cutting edge. Then lead to the blade cracks.

3. Both the front and back sides of the blade are worn at the same time.

This type of wear is a more common form of wear when cutting plastic metals at moderate cutting speeds and feeds.

The total cutting time that begins to be used for precision parts processing after sharpening until the wear amount reaches the wear limit is called the lifespan of the carbide blades. If the wear limit stays the same, the longer the lifespan of the carbide blade, the carbide blade will wear slower.

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