Tungsten Carbide Extrusion Tap Introduction

Details: Category: Tungsten Information; Published on Tuesday, 21 October 2014 17:41

The tungsten carbide extrusion tap is a type of threaded cutter used in inner thread machining according to the principle of metal plastic deformation, and its inner thread machining is chipless machining. It is suitable for the tapping towards copper alloy and aluminium alloy of low intensity and relatively high plasticity and also stainless steel and low-carbon steel with low hardness and high plasticity.

The threads processed by tungsten carbide extrusion taps is of good surface roughness and their metal fibers do not break and there is a chilling layer in their surface which can increase threads’ intensity and abrasion resistance. It has fundamentally solved the chip removal difficulty in tapping. Due to its chipless characteristic, it makes the thread fitting much easier, thus is widely applied in many industry areas such as electronics and plastics.

The tungsten carbide extrusion tap is more suitable for ferrous metal machining. It makes metals be out of shape through squeezing them, and thus produces inner threads. The inner threads formed by squeezing has continuous metal fibers and high tensile and shear strength and also relatively good surface roughness. However, there are higher requirements towards the bottom hole of extrusion tap: If the bottom hole is too too large, then base metals will be fewer and the minor diameter of inner threads will be oversize; if the bottom hole is too small, then the metal being closed and squeezed will have nowhere to go, causing the breaking off of the tap.

Tungsten Carbide Extrusion Tap