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What is drilling and how does CNC drilling work?

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How to do drilling?
The process of drilling holes on solid materials with a drill is called drilling. Drilling is one of the basic methods of hole processing. Drilling is usually carried out on drilling machine or lathe, and can also be carried out on boring machine or milling machine. CNClathing.com provides top CNC drilling services for various materials and uses.

The drilling machine is the main machine tool for hole processing. On the drilling machine, the drill bit (twist drill) is mainly used for drilling. When drilling a hole on a lathe, the workpiece rotates and the cutter moves in the feed. While in the drilling machine processing, the workpiece does not move, the tool does the main rotation movement, and at the same time along the axial movement to do the feed motion. Therefore, the drilling machine is suitable for machining holes on workpieces without a symmetrical rotation axis, especially for multi-hole processing, such as machining holes on box, frame, and other parts. In addition to drilling, the drilling machine can also complete reaming, reaming, countersinking, tapping and other work.

Technological characteristics and features of drilling
(1) The two cutting edges of twist drill are symmetrically distributed on both sides of the axis. When drilling, the radial resistance of twist drill is balanced with each other, so it is not easy to bend as a single edge tool.
(2) When drilling, the cutting depth is half of the hole diameter, and the metal removal rate is high.
(3) It is difficult to cut the surface of the drill bit into a rough hole due to the friction of the chip.
(4) When drilling, the cooling condition is poor and the cutting temperature is high. Therefore, the cutting speed is limited and productivity is affected.
(5) The drilling is rough machining, and its economic accuracy grade is itl3-it11, and the surface roughness is ra50-12.5 μ M. It is generally used for machining holes with low requirements (such as bolt through holes, lubricating oil passage holes, etc.) or pre machining of high-precision holes.

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