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How to choose carbide drill?

Drilling has long been considered to be performed at low feed rates and cutting speeds, which was once correct under the working conditions of normal drills.But now, with the advent of carbide drills, the concept of drilling has changed.In fact, by correctly selecting the right carbide bit, the drilling productivity can be greatly improved and the processing cost per hole can be reduced.So how to choose carbide drill reasonably?Below we follow the carbide bit manufacturers to understand the specific.

There are four basic types of carbide drill bits for users to choose from:

solid carbide drill bits

welded carbide drill bits

carbide indexable bit bits

replaceable carbide crown bits

Each drill has the advantage of being suitable for specific machining conditions.

The solid carbide drill produced by the manufacturer is suitable for use in advanced machining centers.The drill is made of fine-grained cemented carbide materials, and TiAlN coating is applied to extend its service life. The specially designed geometric edge gives the drill a self-centering function and provides good chip control and chip removal performance in drilling most workpiece materials.The self-centering function and strictly controlled manufacturing precision of the drill can ensure the drilling quality of the hole, and the subsequent finishing is not required after drilling.

The welded cemented carbide drill bit is made of a cemented carbide crown solidly welded to a steel drill body.This kind of bit adopts self-centering geometric edge type, the cutting force is small, can achieve good chip control to most of the workpiece materials, the machining hole surface is smooth, the dimensional precision and the positioning precision are very high, do not need to carry on the follow-up finishing.The drill is internally cooled and can be used in machining centers, CNC lathes or other high rigidity, high speed machine tools.

The drill bit fitted with the carbide indexable blade has a wide range of machining apertures, and the machining depth ranges from 2D to 5D(D being the aperture), which can be used in lathes and other rotary machining machines.

Replaceable carbide crown bit is a new generation of drilling tool developed in recent years.It is composed of a steel drill body and a replaceable solid carbide crown. Compared with a welded carbide drill bit, its machining accuracy is comparable, but the crown can be replaced, so the machining cost can be reduced and the drilling productivity can be improved.The drill can obtain accurate aperture increment and has self-centering function, so the aperture machining precision is very high.

The quality of cemented carbide bit is closely related to the purity of the raw material, the way of forming and sintering.The sintering process temperature and time and the control of vacuum degree will directly affect the wear resistance and compressive strength of the cemented carbide bit.SIMUWU vacuum tungsten carbide sintering furnace can pass nitrogen, argon, hydrogen, in a high vacuum environment processing.The temperature can be precisely controlled, the temperature control precision up to ±1℃, the furnace temperature uniformity up to ±3℃-±5℃.The product produced high density, high compressive strength.Can effectively control and reduce the shape of the product in the sintering process, reduce the product tolerance range.