Reasons for the failure of the grooving knife of the grooving machine

The grooving knife of the automatic dust-free grooving machine includes an upper knife and a lower knife. Common upper knives include curved knives and curved serrated knives; lower knives include semicircular acute-angle knives or semicircular right-angle knives. Semi-circular groove width retaining ring. The grooving knife of the automatic dust-free grooving machine includes an upper knife and a lower knife. Common upper knives include curved knives and curved serrated knives; lower knives include semicircular acute-angle knives or semicircular right-angle knives. Semi-circular groove width retaining ring. The service life of the slotting knife of the automatic dust-free slotting machine depends on whether the cardboard slotting quality meets product standards. The grooving quality generally decreases with the wear of the cutting edge of the tool, resulting in burrs, burrs, chips and waste. When the product does not meet the standards, the grooving tool needs to be replaced.
Although there is a slight difference in the service life of the grooving knives between imported and domestic automatic dust-free grooving machines, some of the problems are similar: First, the grooving knife (upper knife) of the automatic dust-free grooving machine can only be used once Second, the reuse effect of sharpening the knife is poor, and the groove quality is unstable; third, the wear resistance of the cutting edge is poor, and some cutting edges are partially cracked; fourth, the frequent purchase of new knives requires a lot of expenses , the production cost is higher.
Analysis of the main reason: The wear of the tool is related to the paper being cut. When the grooving knife is working, the blade of the ruler produces cutting motion on the cardboard and at the same time, the surface is subject to relative friction. The sand content in many cardboards is as high as 5% to 10%. The sand particles produce a strong scraping effect against the cutting edge, causing the metal on the surface of the cutting edge to gradually plastically deform and fall off due to fatigue wear. The life of the tool decreases as the use time increases and the sand content (quartz sand, etc.) and impurities of the cut cardboard increase.