Tungsten steel milling cutter wear

The basic wear law of milling cutter is similar to that of turning tool. The cutting thickness of high speed tungsten steel milling cutter is small, especially in reverse milling, the tool teeth are pressing and sliding seriously on the workpiece surface, so the milling cutter wear mainly occurs on the back surface. When milling steel parts with tungsten steel face milling cutter, because of high cutting speed, the chip sliding speed along the front is large, so the back wear, the front also has small milling tool wear.

The high speed intermittent cutting of tungsten steel surface milling cutter makes the cutter teeth undergo repeated mechanical shock and thermal shock, which causes cracks and fatigue damage of the cutter teeth. The higher the milling speed, the earlier and more serious the milling tool wear. Most tungsten - steel face mills lose their cutting ability due to fatigue damage. If the geometrical Angle of the milling cutter is not reasonable or it is not used properly, and the strength of the cutter teeth is poor, the milling cutter teeth will suffer from wear without cracks after they bear a large impact force.

Prevention measures

(l) reasonable selection of milling cutter blade number: high toughness, low sensitivity to thermal crack, good heat resistance and wear resistance should be adopted. For example, when milling steel, YS30, YS25 and other brands can be used; When milling cast iron, YD15 blade can be used to prevent wear of milling tool.

(2) reasonable milling dosage: under certain processing conditions, there exists a safe working area without damage. Vc and logz in the safe working area can ensure the normal operation of the milling cutter and prevent the milling cutter from wear.

(3) reasonably choosing the relative position between workpiece and milling cutter: reasonably choosing the mounting position of face milling cutter plays an important role in reducing wear of face milling cutter.