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In the conventional machine tool, the sliding bearing is used as the spindle bearing because of the small shift range of the spindle and the low maximum speed. On various types of grinding machines, although the spindle speed of the grinding wheel frame is relatively high, since there is no need for frequent shifting, there are many sliding bearing as the spindle bearing of the grinding wheel frame. angle. Then, behind the sharpening pair, the tail of the arbor is offset to the right, so that the angle between the arbor and the axis of the grinding wheel is 90°K/r, and the secondary declination and the secondary relief angle are ground, and finally the rake face is sharpened. Grind the correct front corner at the same time.
Secondly, when grinding, use a diamond pen or a grinding wheel to trim the grinding wheel to keep the grinding wheel flat and sharp. Firstly, grind the front flank to keep the rake face smooth; then repair the main flank and the secondary flank Keep the main and auxiliary cutting edges straight and sharp; finally, the left hand holds the front end of the turning tool as the fulcrum, and the right hand rotates.
At the end of the rod, the edge of the knife is sharpened.
Thirdly, the chip breaker is ground, and the chip breaker acts as a chip breaking during the cutting process, and at the same time ensures smooth chip removal. In order to break the chips, it is generally necessary to grind the chipbreaker in front of the turning tool; when sharpening the chip breaking groove, the angle between the outer circle of the grinding wheel and the plane must be trimmed with the grinding wheel or the grinding wheel of the grinding wheel. The grinding wheel is shaped into a matching arc or sharp corner. When sharpening, the cutting edge can move downward or upward. The starting position of the sharpening should be separated from the cutting edge and the main cutting edge by a small distance. The grinding force should be light and the movement should be light. Stable and accurate, to prevent the grinding wheel from damaging the rake face and the main cutting edge.
Fourth, the grinding and chamfering, in order to improve the strength of the tool and prolong the life of the cutting part of the tool, the carbide turning tool generally needs to grind the negative chamfer; the sharpening of the negative chamfering edge should be slight, and the turning tool should be along the main cutting edge. The rear end swings in the direction of the tool tip. It is the last step in the sharpening of the turning tool. The sharpening must be careful to prevent the grinding wheel from damaging the ground surface and the edge.
