Каталог Dormer Pramet фрезерование 2021 - 2022 - страница 782

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9 TYPES OF WEAR ON MILLING INSERTS BURRS Description and cause: Corrective measures: This usually occurs on soft steels and plastic materials. • Use a cutting insert with a sharp cutting edge • Use a cutting insert with positive geometry • Use a tool with a smaller setting angle ERRORS IN DIMENSIONS AND SHAPE OF WORKPIECE Description and cause: Corrective measures: Depends on a number of factors. • Use a wear-resistant cutting insert • Improve the stability of the cutter and workpiece • Minimize tool overhang • Use a workpiece with a suitable machining allowance INADEQUATE CHIP FORMATION Description and cause: Corrective measures: Producing a chip with a suitable shape is very important to insert • Change the feed rate and depth of cut durability and service life of the tool. The workpiece material, the feed • Use a more suitable cutting geometry rate, the depth of cut and the cutting geometry all have an effect on chipforming. A chip that is too long is unacceptable for various reasons, while•Change the cutting conditions a chip that is too short is undesirable as it overloads the cutting edge and causes vibrations. 781