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Types of tungsten steel drill bits

Release time:

2022/07/14

Types of tungsten steel drill bits

钨钢钻头

Hardtungsten steel drill bitThere are four basic types: solid carbide drill bits, indexable carbide inserts, welded carbide drill bits and convertible carbide crown drill bits. Each bit has the benefit of being tailored to a particular processing premise.

Tungsten steel drill bit hard alloy indexable insert drilling tungsten steel drill bit with indexable hard alloy insert can process various aperture sizes, and the processing depth ranges from 2D to 5D(D is aperture), which can be used for lathes and other torsion machining.

The welded carbide tungsten steel drill bit is made by smoothly welding the carbide tooth crown to the steel drill body. This kind of drill bit adopts self-centering geometric edge type, with small cutting force, can realize excellent chip control for most workpiece materials, and the machined hole has smooth contour, high dimensional accuracy and positioning accuracy, and does not require subsequent finishing. The drill bit adopts an internal cooling system and can be used in machining centers, CNC lathes or other high-rigidity, high-speed machine tools.

convertible carbide crowntungsten steel drill bitIt is a new generation of drilling tools. It is composed of a steel drill body and a variable integral hard alloy crown. Compared with welded carbide drill bits, the machining accuracy is 82.5kg, but because the tooth crown can be replaced, the machining cost can be reduced and the finished product rate of the drill can be improved. The drill bit provides accurate hole diameter increment and self-centering ability to achieve high hole diameter machining accuracy.

Between the drill body and the hard alloy tooth crown, the interlocking V-groove adjacent mechanism made of fine grinding is locked to each other, which can ensure that the tungsten steel drill bit assembly has the same dimensional accuracy and overall rigidity as the welded hard alloy tungsten steel drill bit. At the same time, the locking mechanism has only one accurate matching position, so that the crown is easy to install on the matching rod, thereby ensuring the repeated positioning accuracy when replacing the crown. When the pull rod passes through the locking screw, the crown/drill body assembly locks smoothly with each other, and its adjacent rigidity is sufficient to meet the requirements of fast and high-speed cross-yield hole processing.

The advanced needle forming process is used to produce hard alloy crowns, with high material uniformity, uniform strength and uniform thermal deformation. Currently available are three with specific geometric edges. One is a universal geometric edge, with a conventional edge blunting radius, edge width and taper angle, suitable for processing various steel materials. The second is that the geometric edge has a wide band edge and chamfer, which is suitable for processing cast iron materials; the three geometric edges reduce the cutting heat and work hardening of stainless steel and alloy materials.

When considering the cost of a single hole, it should also be considered.tungsten steel drill bitThe total life. Generally speaking, an integral carbide tungsten steel drill can only be reground 7 to 10 times when processing steel, a welded carbide tungsten steel drill can only be reground 3 to 4 times, and the convertible hard alloy crown drill The steel crown can be replaced at least 20 to 30 times when processing steel.


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