What are the new structures of the taps?

In order to improve the cutting efficiency of the tap, improve the chip and chip removal situation, reduce the tooth breakage and break, the modern tap has many new structures. (1) screw tip tap: cutting part is worn with chute to form negative edge inclination (see cutting tool). Chip cutting forward is suitable for taper taper hole.
The spiral groove taps: the chip tank is spiral. In processing the right screw thread of the blind hole, the taps should make the right spiral chipping slot to make the chip discharge forward without scratching the thread.
Troughless extrusion Taps: the plastic deformation of metal is formed by the extrusion of the wall of the extruded hole, which is mainly used to process plastic materials such as aluminum alloy and copper, and also for processing low carbon steel and stainless steel. The cone end of the head of the taper is a conical thread. In order to reduce friction and reduce extrusion pressure, the taps section is made polygonal. The extruded tap has high strength and is especially suitable for machining small size holes with diameters below 6 mm.
(4) taps: grinding one tooth along the direction of the spiral line of the knife teeth, thus increasing the chip thickness, which is beneficial to cutting and removing chips, for the processing of stainless steel and other parts.
Content chip tap: chip is discharged from the inner hole of tap and used for machining large size screw holes.
Automatic shrinkage taps: after tapping, the tap teeth can automatically shrink in order to exit quickly.
Broaching tap: a broach with teeth distributed on the helix, commonly used for machining trapezoidal and square tooth threads.
Tungsten carbide tap: mainly used for processing cast iron and non-ferrous metals, cutting efficiency and tool life are higher.