JD carbide drill

                                                                                   JD carbide drillc

Characteristics
The number of tungsten carbide drills, the arrangement and the welding angle are different. The shape of the tungsten steel cutting tool is also different. The bottom edge, the inner edge and the outer edge of the tungsten steel drill can ensure the water and the chip removal. gap. The upper part of the tungsten steel bit body is a threaded connection core tube, the side of the bit body is provided with a water tank, and the bottom lip surface is also provided with a water nozzle. Both the sink and the nozzle ensure the circulation of the rinsing liquid, which eliminates the role of rock powder and cooling the drill bit. In order to increase the clearance when drilling the clay layer and the shale formation, the ribs are welded to the inner and outer sidewalls of the hard alloy drill bit, which is called a rib type drill.
A needle-shaped tungsten steel self-grinding drill can be used for a hard layer having high abrasiveness. Generally, a tungsten steel drill bit is drilled into a rock with a drillability of II-VII grade; a needle-shaped tungsten steel drill bit can be drilled into a VI-VIII grade rock.

classification
Integral tungsten steel drill bit
The integral tungsten steel drill bit is suitable for use in machining centers of advanced predecessors. The whole tungsten steel drill bit is made of fine-grained tungsten steel material. It has a TiAlN coating treatment for the delay of service life. The specially designed geometric blade shape enables the drill bit to have self-centering function, and the workpiece material is drilled. With excellent chip control and chip removal function. The self-centering function of the drill bit and the manufacturing precision of the strict control ensure the drilling quality of the hole, and no subsequent finishing is required after drilling.
Indexable insert bit
Tungsten steel indexable inserts have a wide processing aperture and a depth of 2D to 5D (D is the aperture) for lathes and other torsion machines.
Welded tungsten steel drill bit
The welded tungsten steel drill bit is made by smoothly welding a tungsten steel crown on a steel drill body. The drill adopts a self-centering geometric blade type, and the cutting force is small. The workpiece material can achieve excellent chip control, and the processed hole has a good surface finish, high dimensional accuracy and positioning accuracy. Subsequent finishing. The drill is an internal cooling system that can be used in machining centers, CNC lathes or other high-rigidity, high-speed machines.
Can change tungsten steel crown bit
The changeable tungsten steel crown drill is a new generation of drilling tools. It is made up of a steel drill body and a replaceable integral tungsten steel crown. Compared with the welded tungsten steel drill bit, the machining accuracy is 182 1/2 kg, but because the crown can be changed, it can reduce the processing cost and improve Drilling yield. This drill bit achieves accurate hole size increments and has a self-centering function, which is highly accurate in aperture machining.
select
Precision
When selecting a tungsten steel drill bit, first consider the dimensional accuracy requirements of the drilling process. In general, the smaller the machined hole diameter, the smaller the tolerance. Therefore, the drill bit typically classifies the drill bit according to the nominal diameter size of the hole being machined.
stability
In addition to considering the drilling accuracy requirements, the stability of the machine tool must also be considered when selecting the drill bit. Machine stability is critical to the safe life of the drill bit and the accuracy of the drill. Therefore, it is necessary to carefully check the working state of the machine spindle, clamp and accessories.
Chip removal and coolant
Chip removal is a problem that cannot be ignored in drilling. In fact, the most common problem encountered in drilling is the poor chip removal (especially when machining low-carbon steel workpieces), and no matter which drill is used, this problem cannot be avoided. The shop often uses external injection of coolant to assist chip evacuation, but this method is only effective if the hole being machined is deeper than the hole diameter and the cutting parameters are reduced.
Processing cost per hole
Productivity or processing cost per hole is the most important factor affecting drilling operations. To increase productivity, drill manufacturers are working on machining methods that integrate multiple operating procedures and develop drilling tools that enable high feed and high speed machining