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Wear of tungsten steel cutting tools
Wear form
The basic pattern of milling cutter wear is similar to that of turning tools. The cutting thickness of high-speed tungsten steel milling cutters is relatively small. Especially during the up and down milling process, the teeth of the workpiece are compressed and slip more severely, so the wear of the milling cutter mainly occurs on the back. When using tungsten steel face milling cutters to mill steel parts, due to the high cutting speed, the chips slide at high speeds along the front, resulting in wear at the rear and less wear on the front milling cutter.
The tungsten steel face milling cutter carries out high-speed intermittent cutting, which makes the cutter teeth bear repeated mechanical and Thermal shock, resulting in cracks and fatigue damage of the cutter teeth. The higher the milling speed, the faster and more severe the wear of the milling cutter. Most tungsten steel face milling cutters lose cutting CNC Inserts ability due to fatigue damage. If the geometric angle of the milling cutter is improperly selected or used, and the strength of the cutter teeth is poor, the cutter teeth will wear out without cracks after bearing a large impact force.
preventive measure
(l) Reasonable selection of milling cutter blade grade: Blade materials with high toughness, low thermal cracking sensitivity, and good heat resistance and wear resistance should be used. For example, blades such as YS30 and YS25 can be used when milling steel; When milling cast iron, YD15 and other blades can be used to prevent milling cutter wear.
(2) Reasonable selection of milling volume: Under certain processing conditions, there is a safe working area that will not cause damage. Selecting Vc and ? z in the safe working area can ensure the normal operation of the milling cutter and prevent the wear of the milling Cermet Inserts cutter.
(3) Reasonable selection of the relative position between the workpiece and the milling cutter: Reasonable selection of the installation position of the face milling cutter plays an important role in reducing the wear of the face milling cutter.

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