1, the selection of grinding wheel:
(1), alumina grinding wheel: white, the sand toughness is good, more sharp, but the hardness is slightly lower, suitable for grinding high-speed steel and carbide section of the arbor. The alumina wheel is also called corundum.
(2), silicon carbide wheel: green, the sand hardness, cutting performance, but more brittle, suitable for sharpening carbide car.
The thickness of the grinding wheel is indicated by the particle size, coarse grinding with coarse grain size and fine grain.
2, the tool grinding method and steps:
(1), first grind the front, behind the welding slag, and grinding the bottom of the knife, available particle size 24-36 of the alumina wheel.
(2), coarse grinding the back of the main and vice back of the handle part: grinding, the grinding wheel in the outer cylinder slightly higher than the horizontal position of the center of the wheel will be tilted a knife than the rear corner of the body 20-30 Angle, and to move slowly around, so that the blade on the blade after the main horn and vice angle. Optional size of 24-36, the hardness of the soft alumina wheel.
(3), the main grinder on the back of the main body: grinding the blade, the shank should be parallel with the wheel axis, while the bottom of the blade to the direction of the wheel tilt a greater than the main angle of 20 angle. Grinding, the first knife has been grinding the back surface of the grinding wheel on the outer circumference of the wheel to close the center of the grinding wheel for the grinding position of the starting position, and then continue to sharpen the grinding wheel, and slow left and right mobile. When the wheel to the blade to the end. This can simultaneously grind the main declination and the main horn. Optional 36-60 silicon carbide wheels can be used.
(4), the rough side of the knife on the back angle: grinding side of the back, the handle of the tail should be turned to the right side of a sub-angle angle, while the bottom of the car to the direction of the wheel tilted a longer than the rear angle 20 Of the angle, the specific grinding method and coarse grinding blade on the main back of the same, the difference is that the grinder after the grinding wheel should be grinding to the tip of the knife so far. Can also be grinding at the same time the vice angle and vice angle.
(5), rough grinding in front: the end of the grinding wheel grinding the front of the knife, and grinding in front of grinding at the same time the front angle.
(6), grinding broken flute: There are two kinds of chip breaker, one is linear, suitable for cutting hard materials; one is arc type, suitable for soft materials.
Manual cutting of the chip breaker is generally circular arc, the grinding wheel should be the outer and the end of the angle of the grinding wheel with a diamond grinding pen to the corresponding arc. If the grinding edge of the straight-type chip breaker, the grinding wheel angle to be grinding is very sharp. Grinding can be ground down or grinding up, but the choice of grinding chip breaker parts, should be considered to leave the width of the head chamfering.
Note:
Grinding angle should always be sharp or have a certain shape of the arc, when the edge of the wheel has a larger edge, it should be timely dressing.
The starting position of the grinding edge should be at a distance from the cutting edge and the main cutting edge, and the distance from the main cutting edge is half the width of the chip breaker plus the width of the chamfer.
Grinding, the attention can not be too much force, the direction of the knife along the knife slowly moving. Small size of a forming, large size can be divided into coarse grinding and grinding two grinding process.
(7), fine grinding the back and vice back: fine grinding before the best dressing a good wheel, to keep the wheel smooth rotation, turning the bottom of the plane against the adjustment of the bracket, and the cutting edge gently against the wheel end On the end of the wheel along the slow left and right to move. Optional with a grinding wheel with a particle size of 180-200.
(8), grinding chamfer: negative chamfer angle of -50--100, width b = (0.5-0.8) f. For the use of more than the angle of the carbide car, as well as the hardness of the material is particularly low should not use negative chamfer.
Grasp the chamfer, the force is slight, so that the main cutting edge of the rear end of the tool to the direction of swing. Knife grinding can be used straight grinding and horizontal grinding method, it is best to use straight grinding method.
(9), grinding the transition blade: grinding cutting edge and grinding the same way the blade, grinding grinding hard wood tool turning, but also in the transition edge grinding on the negative chamfering.
(10), turning the manual grinding: grinding with oil stone, requiring smooth action, uniform force.
Note: grinding should be standing on the side of the grinding wheel grinding.
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