The main elements of a broaching machine 06/12/15


Broaching is a process requiring precision and speed, used most of the times in the manufacturing industry. It is commonly related to the metalwork area, and even if performing tools and advanced technologies are involved in this process, it is largely applied for a wide variety of purposes. The broaching machine is a popular tool, simple yet efficient, because all it has to do is move the linear or rotary broaches at a high speed, in order to cut certain materials. There are many types of such machines: some are vertical and others are horizontal, but the vertical ones are way more popular and manufacturers prefer it, because it occupies less space than the horizontal models. Through a single pass, the broaching machine can remove material from any surface and this is possible due to the action of multiple cutting edges arranged in a series.

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How does the broach work?

The broach works in a speedy and efficient manner, due to the fact that it is made of hard steel and is provided with sharp teeth which create a strong cutting edge, extremely efficient for many types of material, including metal. Most broaches are hydraulic machines, but there are also some special tools which are mechanically driven. The machine can be used to flatten or make cuts on internal and external surfaces, regardless the shape of the work piece.

The internal elements of a broach

Since it uses the hydraulic force, the internal elements of a broaching machine are divided into two categories: the traction and the compression elements. The first category is formed of a steam system, which applies force on the external parts in order to make an accurate and fast cut. When this is performed exclusively through traction, the process is takes place in a similar manner as the one using compression. The compression element lacks some parts, but the other items are the same, except for the nomenclature of the teeth that may sometimes vary.

The teeth design

In case you are wondering how such a simple machine can deliver efficient and precise results, you should know that this is possible due to the sharp teeth of the broach. The teeth elements are especially designed to answer to precise orders. Everything is designed with accuracy: their length, their sharpness and the most important, the distance between them. All these are diligently measured, because even the smallest error can lead to many products ruined, which is something great manufacturers cannot afford. Since a complete broaching cycle takes about 20 seconds and delivers similar pieces, using a wrongful tool can ruin an entire chain of production. If the height, length or distance between the teeth is not the correct one, this may cause quality problems as far as the resulting pieces are concerned, because the machine can damage both the finish and the material. Another important aspect related to the teeth of the broach is calibration, which is most of the times influenced by the angle and the radii of the teeth edge.