It has always been believed that drilling must be carried out at a lower feed rate and cutting speed. This method used to be correct under the processing conditions of ordinary drills. But now with the advent of tungsten carbide drill bits, the concept of drilling has also changed. In fact, by choosing the appropriate tungsten carbide drill bits, the drilling efficiency can be greatly improved and the cost of each hole can be reduced. So how to choose the right tungsten carbide drill bits?
There are four basic types of user-selectable tungsten carbide drill bits: integral tungsten carbide drill bits, welded tungsten carbide drill bits, tungsten carbide indexable drill bits and replaceable tungsten carbide cone drill bits. Each drill has its advantages suitable for specific processing conditions.
The integral tungsten carbide drill bits produced by the manufacturer are suitable for machining centers. This drill is made of fine-grained cemented carbide. In order to prolong its service life, TiAlN coating treatment is also carried out. The specially designed geometric cutting edge enables the drill to have an automatic centering function. It has good chip control and chip removal performance when drilling most workpiece materials. The self-centering function of the drill bit and the strictly controlled manufacturing accuracy ensure the quality of the drilling, and there is no need for subsequent finishing after drilling.
Welded tungsten carbide drill bits are made by firmly welding a hard alloy crown on the steel drill body. The drill adopts a self-centering geometric edge shape with small cutting force and can achieve good chip control for most workpiece materials. The surface finish of the machined hole is good, and the dimensional accuracy and positioning accuracy are very high, so there is no need for subsequent finishing. The drill bit adopts internal cooling, which can be used for high rigidity and high-speed machine tools such as machining centers and CNC lathes.
Drills with cemented carbide indexable inserts can be used for various machining apertures, and the machining depth ranges from 2D to 5D (D is the aperture). It can be used for lathes and other rotating machinery. Replaceable hard alloy roller cone bits are a new generation of drilling tools developed in recent years. It is composed of a steel drill body and a replaceable solid carbide crown. Compared with welded carbide drills, its machining accuracy is equivalent. However, because the crown is replaceable, the processing cost can be reduced and the drilling productivity can be improved. This kind of drill can obtain precise hole size increments and has a self-centering function, so the hole diameter processing accuracy is very high.
We can customize various industrial non-standard tools according to customer needs, such as cemented carbide milling cutters, high-temperature alloy milling cutters, stainless steel milling cutters, titanium alloy milling cutters, etc., which are well received by customers!
