The drill bit shall sharpen the horizontal edge, the main cutting edge of BAI, and the chip cutting groove shall be sharpened to meet the following requirements :
1. The bevel angle of the drill bit shall be between 50-55 degrees, and the width of the horizontal edge shall be equal to the 0.03-0.05d diameter.
2.Grinding main cutting edge to be straight, combined in the grinding Angle of 118 to 135 degrees to ensure that.
3. Repair and chip dividing slots are arranged staggered on the main cutting edge and the depth is about 0.2-2. Drill grinding machine grinding bit can adjust bit at apex Angle (apex Angle), escaped clearance Angle (Angle) after the size of the chisel edge, center, alternative center drill positioning, and is equipped with static point (center) size adjustment function, can do effective cooperation with drilling material, speed, can control the quality and precision of the workpiece and extend the service life of drill bit.
In the face of most production scenarios, it must be unreasonable to remove all the horizontal edges, otherwise, the horizontal edges will not exist when the drill bit is finished.
After the horizontal edge is sharpened, it forms a drilling point, which plays a centering role and is also a cutting edge on the drilling core.
The transverse edge Angle is the most intuitive parameter to check the front and rear Angle of the bit. Too large or too small the transverse edge Angle will directly affect the cutting performance.
The length of the transverse edge determines the cutting resistance and cutting edge strength.
Therefore, if the grinding edge is not properly sharpened in the center, it will affect the bit centering and further affect the hole size.If the Angle of the transverse edge is too large, the cutting environment or resistance will become worse; If the horizontal edge is too short, the edge strength will be lower, but less durable.
Demina has produced 150F drill grinding machine. It can regrind the carbide drills with high efficiency.
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