How to Properly Use Deep Hole Drilling to Work Better

In recent years, deep hole drill ingress has gradually been favored by some people, its speed is more impressive, plastic mold cooling water passages, barrel or hydraulic cylinder or jet engine or ship propeller hollow shaft, deep hole drill in too many workshops have become a serious bottleneck constraint. This problem is particularly acute when using gun drills to process high-standard holes. When drilling into a depth of 4 times the diameter, start blocking the chips, and the more inside, the worse. The drill is located at the end of a slender rod, moving slowly like a snail stroll, and the roundness and position of the hole is not good. These are before the cutting edge begins to break.

In a tube drilling system, the cutting head is mounted on a thin-walled drill pipe slightly smaller than the aperture. The cutting fluid is pumped into the gap between the hole wall and the drill pipe, and the chips are flushed out of the inner hole of the drill pipe. This allows the cutting head to work on a firmer basis, delivering more torque, withstands greater cutting force, and expands the chip drain channel compared to the small drill pipe of the gun drill. The ultimate benefit is faster processing and smoother chip removal.

Using a gun drill, on the Ti6AL4V titanium workpiece, process a 40mm diameter (1.6) depth (26") hole, the best workshop using 300r/min speed can be processed 12.7mm (0.5) per minute), to complete a piece required 52min. The use of traditional carbide drills improved slightly, but the blade began to break when drilling the second piece, causing the clutch to slip.

For smaller diameter holes and apertures far smaller than pipe drill diameters, the current solution is to use ISCAR's new integrated carbide deep hole drill. The drill bit was introduced in the second half of 2008 and has been successfully used in many power locomotive processing, including crankshaft oil holes. Other applications include camshafts, linkagebars, cylinder heads, cylinder blocks, hydraulic parts and molds. The recommended maximum diameter ratio is 22:1.