Page 554 - Industrial Tools Catalog (1)
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Lathe tools \ Technical introduction–CBN turning

                    Hard machining process with CBN


        Cutting hardened steel is referred to as hard cutting. By introducing energy in the form of cutting speed
        vc, feed f, depth of cut ap and different cutting edges = chamfer, self-induced hot cutting is produced. This
        requires a defined high temperature of approx. 550 to 750° C in the shear zone. Cooling is not required for
        this process.
        To generate and maintain the ideal cutting temperature in the shear zone, the following must be observed:
        ƒ Selection of appropriate cutting material for different materials,
        ƒ Determination of appropriate bevel geometry A-H
        ƒ Identification of cutting speed in event charts (hardness diagram with increasing temperature)
        The following points must be noted:
        ƒ Exact specification of the type of steel and its hardness in HRC.
        ƒ Required surface quality Ra in µm as well as cutting depth.
        ƒ Machining conditions smooth, slightly interrupted or severely interrupted cut







































































              Source: Hahn+Kolb Werkzeuge GmbH
        554   Technical data subject to change.                                           www.iconridge.com
              Availability subject to country specific rules and regulations.
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