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Reasonable selection of the relative position between the workpiece and the milling cutter: Reasonably selecting the mounting position of the face milling cutter plays an important role in reducing the wear of the face milling cutter.
The basic rule of milling cutter wear is similar to that of turning tools. The cutting thickness of the high-speed tungsten steel milling cutter is small, especially in the case of up-cut milling, the cutter teeth are pressed against the workpiece surface and the sliding is serious, so the milling cutter wear mainly occurs on the back. When milling steel parts with tungsten steel face milling cutters, because of the high cutting speed, the cutting speed of the chips along the front is large, so the rear wears at the same time, and there is also a small milling cutter wear in front.
The tungsten steel face milling cutter performs high-speed interrupted cutting, so that the teeth are subjected to repeated mechanical shocks and thermal shocks, causing cracks and causing fatigue damage of the teeth. The higher the milling speed, the earlier and more severe the wear of the milling cutter. Most tungsten steel face milling cutters lose their cutting ability due to fatigue damage. If the geometry of the milling cutter is unreasonable or improperly used, and the strength of the cutter is poor, the cutter teeth will wear without a crack after receiving a large impact force.
Tungsten steel milling cutter prevention measures
(l) Reasonable selection of milling inserts: Blade materials with high toughness, low resistance to thermal cracking, and good heat resistance and wear resistance should be used. For example, when milling steel, YS30, YS25 and other grades can be used; when milling cast iron, YD15 and other grades can be used to prevent the cutter from being worn.
(2) Reasonable use of milling: Under certain processing conditions, there is a safe working area that does not cause damage. Selecting Vc and ∫z in the safe working area ensures that the milling cutter works properly and prevents the milling cutter from wearing out.
(3) Reasonable selection of the relative position between the workpiece and the milling cutter: Reasonably selecting the mounting position of the face milling cutter plays an important role in reducing the wear of the face milling cutter.