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Three forms of wear of the cutting piece

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  • Three forms of wear of the cutting piece

    As a result of the wear of the cutting piece, the grinding performance is deteriorated, and the main forms thereof are passivation type, peeling type (shape distortion) and clogging type.
    When the low price disc for metal has a high hardness, the dressing is fine, and the grinding load is light, the passivation type is likely to occur. At this time, although the quality of the processing table is good, the metal removal rate is remarkably lowered.
    When the hardness of the cutting piece is low, the dressing is thick, and the grinding load is heavy, it is easy to fall off. At this time, the profile of the aluminum abrasive cutting disc is distorted, which seriously affects the quality of the grinding surface and the machining accuracy.
    When the carbon steel is ground, the chips are softened at the high temperature of the grinding, and the caulking is formed in the gap of the cutting piece to form an embedded plug. When the titanium alloy is ground, the chip is sintered due to the strong affinity of the chips and the abrasive grains. Adhered to the abrasive particles to form an adhesive plug. When the cutting piece is clogged, the cutting ability is lost, the grinding force and temperature are sharply increased, and the surface quality is significantly reduced.
    There are three basic forms of saw blade wear: wear wear, break wear and peel wear.
    (1) Abrasion wear and wear wear are characterized by the formation of worn small facets on the abrasive grains of the fiber cutting disc Chinese supplier. During the grinding process, due to the mechanical friction of the hard spots of the workpiece, high temperature oxidation and diffusion will cause the abrasive grain cutting edge to be generated. Loss passivation.
    (2) Fracture wear: During the grinding process, the abrasive grains are subjected to repeated rapid heat and rapid cooling, and great thermal stress is formed on the surface of the abrasive grains. Finally, the abrasive grains are partially broken along a certain surface.
    (3) Shearing wear; during the grinding process, as the grinding temperature increases, the strength of the bonding agent decreases accordingly. When the grinding force increases beyond the strength of the bonding agent, the entire abrasive particles are detached from the dicing sheet, i.e., detached and worn.