Tips to Sharpen the Drill

In the daily life, twist drill is a commonly used drilling power tool with simple structure. So, sharpening the drill bit is very important for the processing of the workpiece, but it is not an easy task to sharpen the drill bit of power tool. Now we will tell about the some tips to sharpen the drill.

We know that twist drill power tool is often used in daily life. Before grinding the power drill bit, the main cutting edge of the drill bit and the grinding wheel surface should be placed on a horizontal surface, that is to say, you must ensure that the entire edge is ground when the cutting edge contacts the grinding wheel surface. This is the first step in the relative position of the drill bit and the grinding wheel. Set the position and then slowly lean on the surface of the grinding wheel of rotary drill tool.

Generally speaking, the front angle of the drill is one of the important parameters during sharpening. If this angle is not correct, it will directly affect the size of the top angle of the drill and the shape of the main cutting edge and the bevel of the chisel edge. The positional relationship between the drill bit axis line and the surface of the grinding wheel is just 60°. This angle is generally more accurate. Here you should pay attention to the relative horizontal position and angular position of the drill bit before sharpening. The two should be taken into consideration.

After the cutting edge touches the grinding wheel, it should be ground from the main cutting edge back, that is to say, the cutting edge of the drill starts to touch the grinding wheel, and then slowly grinds down along the entire flank surface. When the drill bit is cut in, you can lightly touch the grinding wheel, firstly you should perform a smaller amount of sharpening, and pay attention to the uniformity of the spark, adjust the pressure on the hand in time, and also pay attention to the cooling of the drill bit. When the temperature of the cutting edge is high, the twist drill bit should be cooled in time.

The standard action of hand drill rotary tools is that the main cutting edge swings up and down on the grinding wheel, that is to say, the hand holding the front of the drill bit must evenly swing the drill up and down on the surface of grinding wheel. However, the hand holding the handle cannot swing, and the rear handle must be prevented from tilting upwards, and the tail of the handheld drill bit cannot be tilted higher than the horizontal center line of the grinding wheel, otherwise the cutting edge will be blunt and unable to cut. This is the most critical step which decides the quality of twist drill bit. When the sharpening is almost done, start from the edge of the blade and rub it lightly towards the back corner to make the back of the blade smoother. Now the twist drill bits blade has sharpened well.