Twist Diamond is a commonly used drilling tool. The key is to master the methods and skills of the grinding of the blade, to master the method and the experience of the blade of the blades, you can master the grinding scale of the blade of the drilling bit.
The upper angle of the torsion diamond is generally 118 °, and it can also be considered 120 °. The blade grinding exercises can master the following 6 techniques.
1. Before grinding the forest, put the main cutting blade and the surface of the sandwheel of the drill head on a horizontal plane, that is to say when the opening of the blade is exposed to the Surface of the sand wheel, the whole blade must be crushed. This is the first step in the relative position of the forest and the sandwheel, then slowly rely on the surface of the sand wheel.
2. This angle is the angle of the forest. This refers to the position of the position between the axis of the drilling head and the surface of the wheel. Here, we must pay attention to the relatively horizontal position and the angle position before the drilling head blade. corner.
3. After the blade is exposed to the sandwheel, grind it from the main cut of the blade, that is to say from the blade of the drill head opening first contact the wheel, Then slowly grind the entire surface of the rear knife. When cutting the drill, you can gently contact the sandwheel, first make a small amount of blade milling and pay attention to the uniformity of the spark, adjust the pressure on time and pay attention to Cooling of the piercer. When the blade temperature is high, cool the forest over time.
4. It is a standard drilling head crushing movement. Lower surface of the sand wheel. However, the hand of the handle cannot be swinging and the rear handle must be prevented from being tilted. Blurred and not cut. This is the most critical step. When it is almost ground, start with the mouth of the blade and gently stretch the corners to make the back of the blade smoother.
5. After the edge of the blade is crushed, the mouth on the other side is crushed. . The experienced masters will slowly repair the symmetry of Liang Guangcha to look at the points of the drill.
The rear corner of the drilling cutting blade is generally 10 ° -14 °, the rear area is large, the cutting blade is too thin and the vibration is vibrated during drilling. Easy to cut, the cutting force increases, the temperature increases, the hair is serious and the drilling head is serious and cannot even drill. The angle of the rear angle is suitable, the tip is opposed, the two blades are symmetrical.
6. Once the two blades are crushed, pay attention to the drilling head with a large diameter exercise.
After the two blades of the drill are crushed, there will be a plane at the forefront of the two blades, which affects the central positioning of the drill. small as possible. The method consists in erecting the drilling head and targeting the horns of the wheel and pouring a small slit at the root of the blade. It is also an important point for the slightly cutting center and the quick cut. Note that when repairing the pointed corner of the blade, you should not be crushed with the main cutting blade.
The blade of the borehole does not have a certain formula.
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