Processing method of chip removal for deep hole machining

Holes with relatively small holes can be drilled with a twist drill. For smooth chip evacuation, the iron swarf should be straight out and bring out small pieces, and the coolant can be easily entered. The drill bit can be milled with three tips. The grind method created by Ni Zhifu of the blade (in the Cultural Revolution, it is called group drill in order not to stand out for the individual) is a simple method of deep hole machining.

1, The angle of the cutting edge is increased to 130-140 degrees to increase the chip thickness and change the direction of chip discharge (the chip discharge direction is perpendicular to the cutting edge)

2. Trimming the traverse edge to reduce the axial cutting blade and the cutting edge to generate a flank at the drill core to facilitate swarf cutting.

3, if the drilling diameter is larger, it can be used to grind the flutes on one side of the cutting edge. It should be wider and wider to balance the cutting force of the two cutting edges. If the diameter is large, the flutes can be grinded at two cutting edges.

4, in the outer edge of the edge down 1 mm 45 degrees to reduce wear and improve the finish.

5. The rotational speed of the drill hole is slightly lower, and the feed amount should be larger, so that the thickened chips are discharged in strips.

6, The nozzle of the coolant should face the hole in order to facilitate the coolant into the cutting area.

Die deep hole processing manufacturers found that when the hole through the ratio of more than 8 times the bulk of the best in the special deep hole drilling machine drilling, the effect is very high, I have tried to produce lathe spindle diameter 32 length about 850 mm material 45 steel only With 13 minutes minutes.

The deep hole drill has two kinds of chip removal and chip removal.

Smaller diameter chips are used for effluent removal because the drill pipe is too small to remove swarf. The hole with a large diameter has enough space for chip evacuation, and high-pressure oil is pressed between the hole wall and the drill pipe to cut the swarf. The heat is discharged from the rod. The drill is a special carbide used in general. It is divided into two parts: the guide and the cutting edge. The chip is ground into a trapezoidal shape to divide the chip. The height and width of the chip breaking groove depend on the material and feed of the workpiece. It is better to ensure that the chip shape is a tight C shape or a tile shape.