What is carbide slotting cutter?

The slotting cutter is gear-shaped or rack-shaped in appearance, and it is often used to process internal and external meshing spur and helical cylindrical gears. In particular, it can also process multiple gears, herringbone gears and gears with shoulders, etc. The slotting cutter with a special shape can also process a variety of special-shaped workpieces, such as cams, internal splines, etc. According to the shape classification, the slotting cutter can also be divided into a disc shape, cylinder shape, bowl shape and tapered handle shape.

Carbide slotting cutter has great advantages over other materials in terms of hardness, strength and wear resistance.

 

carbide gear cutters, carbide slotting cutter

 

Features of carbide slotting cutter

 

Generally, the carbide slotting cutters used for hard tooth surface processing are in the form of a negative rake angle on the top edge, so that the cutting edges on both sides obtain corresponding negative edge inclination angles, and the gear shaper process has bevel-cutting characteristics. The chipping resistance and wear resistance of the tip and side edge of the gear shaper cutter are improved by increasing the rake angle of the negative depth of the cut. And this cutting characteristic is not only suitable for hobbing hard tooth surfaces but also suitable for gear shaping of hard tooth surfaces.

In order to improve the cutting performance on the basis of maintaining the precision of the tooth shape of the carbide gear shaper, the rake angle of the top edge is generally -5°. The tooth flank of the cemented carbide gear shaper cutter is an involute helical surface, and this helical surface only has an involute tooth shape in its truncated surface. However, when the carbide gear shaper cutter makes the rake angle and the relief angle, the cutting edge deviates from the truncated surface, and there is a certain error between its shape and the theoretical involute, and this error is difficult to measure directly. Therefore, it is difficult to further modify the shape of the cutting edge during the gear grinding process, and the tooth profile angle of the cemented carbide gear shaper cutter needs to be corrected.

In order to break through the traditional configuration (conical surface) of carbide gear shaper cutters, which are prone to chipping and low gear shaping accuracy, the researchers also tried a new configuration of carbide gear shaper cutters, replacing the traditional cone surface with a special-shaped convex surface and As the rake face of the tooth of the gear shaper. In this way, the absolute value of the negative rake angle of the section will be greatly increased; the intersection line of the special-shaped convex rake face and the side flank face is located on the conical surface with a certain base angle at the same time so that the change of the side edge space curve tends to be gentle, thus effectively It effectively prevents some distortions caused by the difficult control of the space curve shape of the cutting edge in the traditional gear shaper cutter and provides a guarantee for the cutting performance of the tool and the surface quality of the workpiece. In general, the special-shaped convex-curved carbide gear shaper cutter effectively solves the contradiction between the cutter configuration accuracy and the cutter inclination angle in the traditional configuration, thereby improving the wear resistance and chipping resistance of the cutter.

 

Use of carbide slotting cutter

 

Each shape of the gear shaper cutter can correspond to different workpieces.

Disc shaper cutters are mainly used to process straight teeth, helical teeth and herringbone gears with internal and external meshing;

Cylindrical gear shaper cutters can be used to process internal gears and external gears with relatively small modules;

The bowl-shaped gear shaper cutter is mainly used for the processing of multi-joint and internal and external meshing spur gears with shoulders. The nut used for clamping during work can be accommodated in the gear shaper cutter body, which will not hinder the processing process;

Tapered shank gear shaper cutters are mainly used in the machining of internal meshing spur and helical gears.

Nowadays, in actual production, high-speed steel is the most common material for gear shaper cutters, but many studies have shown that carbide gear shaper cutters have better performance than them. In terms of hardness, strength and wear resistance, the carbide gear shaper cutter has been greatly improved.

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