Aug 24, 2017
HSS Drill Bits Master master
Sharpening drill main master a few skills:
1, edge with the wheel surface to settle.
Before grinding the drill bit, first place the main cutting edge of the drill bit and the grinding wheel surface in a horizontal plane, that is, to ensure that the edge of the grinding wheel surface, the entire blade must be ground. This is the relative position of the drill bit and the relative position of the grinding wheel, and then slowly to the wheel surface to rely on.
2, the bit axis and the wheel surface oblique 60 ° angle.
This angle is the tip of the drill bit, this angle is not right, will directly affect the size of the drill tip and the shape of the main cutting edge and horizontal cutting edge angle. This refers to the drill bit axis and the wheel surface position between the relationship, take 60 ° on the line, the angle is generally comparable to see the prospective. Here to pay attention to the drill bit before grinding the relative horizontal position and angle position, the two should be balanced, not to settle the edge and ignore the pendulum angle, or in order to set the angle and ignore the pitching edge.
3, by the edge of the back of grinding.
After the edge of the grinding wheel contact, from the main cutting edge to the back of the mill, that is, from the drill edge of the first contact with the grinding wheel, and then along the entire flank slowly down grinding. Drill bit can be gently touched when the grinding wheel, the first small amount of sharpening, and pay attention to observe the sparks of the uniformity, timely adjustment of the size of the hand pressure, but also pay attention to the drill bit cooling, can not let it off the fire, causing the edge of color , And to the edge of the annealing. Found that the edge of the high temperature,
To cool the drill bit in time.
4, the edge of the drill bit to swing up and down, the tip of the drill can not be Alice.
This is a standard bit grinding action, the main cutting edge in the grinding wheel to swing up and down, that is, grip the front of the drill head to evenly on the grinding wheel on the grinding wheel up and down swing. While the handle of the hand can not swing, but also to prevent the rear handle upturned, that is, the tail of the drill can not be high above the horizontal center line, otherwise it will make the edge blunt, can not cut. This is the most critical step, drill bit grinding well and bad, and this has a great relationship. In the grinding almost, from the edge of the beginning, the back corner and then gently rub some, so that the edge of the blade more smooth some.