Milling is one of the main methods of hole machining.

Milling is inseparable from drill bits. There are more and more types of drill bits. Please list them about:

Twist Drill

Common drill bit, generally refers to a one-piece or welded, forming groove bit containing spiral groove.

The key to the model selection of this forming groove drill bit lies in the drill bit material, drill tip method and processing application.

Forming slot bit materials include hard alloy, high speed steel, electric welding hard alloy, electric welding CBN, electric welding PCD, etc.

The drill tip method is not only divided into different types of drill tip angles, but also different drill tip methods, such as three-tip two-edge drill, group drill, etc.

For different processing applications, it can also be divided into step drills, chamfered drills, etc.

machine clamp drill bit

Generally, it refers to a drill with a replaceable carbide cutter head.

There are several typical ways of this kind of drill bit, such as replaceable drill bit, knife type shallow hole drill, and guided drill type machine clamp drill bit.

Center Drill

One-piece drill for center hole milling.

straight groove drill

Generally refers to, straight groove (non spiral groove) type integrated drill.

Cooperate with the internal cold of the CNC lathe, and can process holes with high concentricity and parallelism.

cone drill

Drill that can be machined out of a tapered hole.

Reamer

A drill used to expand the diameter of a hole that has been made.

Through hole drill

Specially used for machining nozzle through hole drill.

In order to ensure the parallelism of the through hole and the hole, the guide column can be used together.

Counterfacer

Specially used for processing nozzle taper hole drill.

In order to ensure the parallelism of the taper hole and the hole, the guide column can be used together.

deep hole drilling machine

Drill for machining shallow holes.

Various types, including gun drills with external milling surfaces, shallow hole flat drills, shallow hole twist drills, and jet suction drills with internal milling surfaces.

Nest drill

Using the ring drilling method, the larger hole drill bit is processed on the material of the solid line.

The core is reserved for nesting drilling.

Processing technology

According to the outer diameter and total length of the drill bit in the design scheme, aluminum alloy round bar automatic cutting machine or wire cutting equipment can be selected to carry out fixed length processing.

For a round rod with a fixed length laser cutting better, the square head on both sides can be carried out from a manual numerical control grinder.

The chamfering or hole-opening process is carried out on the port of the aluminum alloy round bar that has been ground a little bit to lay the foundation for the diameter and shank of the cutting bit. In fact, it depends on whether the cylindrical grinding fixture is the male top or the female top.

The diameter of the outer circle of the drill bit is processed in a high-precision grinding machine to avoid empty parts and the diameter of the shank to ensure the diameter coaxiality, cylindricity, surface smoothness and other design points.

In order to ensure high processing efficiency in the numerical control vertical lathe, the contents of the drill tip can be chamfered from the aluminum alloy round bar before the numerical control vertical lathe, for example, 140 drill tip angle, which needs to be finely ground to 142 during chamfering.

After cleaning up the aluminum alloy round bar after chamfering, turn to the numerical control vertical lathe process flow, and process each part of the drill bit in the five-axis numerical control grinding machine.