How to handle the Angle of the sharpener
The master behind the rougher In the back of the mill, the handle should be parallel to the wheel axis of the wheel, while the blade of the knife is tilted at a Angle of 20 from the main Angle. When grinding, grinding tool has good first after gap surface depend on the cylindrical grinding wheel, close to the level to the starting position of the grinding wheel center, and then move to the position of grinding wheel near the left and right to move slowly. The grinding wheel grinds to the edge of the blade. This will also sharpen the main Angle of the kappa r = 900 and the rear Angle. Optional: 36 # ~ 60 #, silicon carbide wheel.
The shank of the back and behind the rougher. Grinding, horizontal location in the center of the slightly higher than the grinding wheel will be turning a cock than those of the blade Angle after 20 ~ 30 point of view, in order to go up grinding blade Angle after the main and vice Angle, can choose size for # 24 ~ 36 #, hardness of soft (ZR1, ZR2) of alumina grinding wheel.
Grinding tool First of all: the plane should be flat. Second: there is an Angle in your mind (what is the concept of 3 degrees 7 degrees on a car knife) Again, you can tell the order in which the grinding knife is in the geometric Angle First, grind the front of the lathe, and then the slag on the back, And grind the bottom surface of the lathe. The size of the aluminum oxide wheel is 24 # ~ 36 #.
Chip breaker groove It is difficult to grind the cuttings, and pay attention to the following points: The Angle of the grinding wheel should always be sharp or circular. When the rim of the grinding wheel has worn out the larger rounded corners, it should be fixed in time. (2) should be the starting point of the position and the point when grinding, the main cutting edges from a distance, not directly from the start to the main cutting edge and grinding blade, and make the main cutting edge and grinding tip slump. The distance between the normal starting position and the tip of the knife is equal to the length of the shavings slot. The distance from the main cutting edge is equal to 1/2 the width of the chip and the width of the chamfer. The blade should not be too big, and the tool should move slowly up and down the handle of the blade. Pay special attention to the tip of the blade and cut the front end of the chip. The shape, position and the size of the forehorn should be checked repeatedly during the grinding process. In the case of the larger shavings, it can be divided into coarse grinding and fine grinding. A small size can be worn at one time.
The back of the rough knife Behind the mill vice, handle the tail should be turned to the right a pair of Angle kappa r 'point of view, predominate at the same time the bottom of the tool grinding wheel direction flat face inclined than a pair of big Angle after 20 Angle. The concrete blade grinding method is approximately the same as the main back of the rougher. The difference is that the grinding wheel should be worn to the tip of the blade. In this way, you can also grind out the subangle kappa r 'and the second pair of postangular alpha' alpha '. 5, coarse grinding the front Grinding out the front of the lathe with grinding wheels and grinding out the front Angle gamma0
