A quick guide to the main types of broaching tools

Those who do not do a lot of handiwork may not know how difficult it can be to give the keyway its peculiar shape. We often buy things readily done and do not spend much time thinking about how our cars come to look the way they look. Through the process of finishing materials are given their predetermined shape. In order to customize certain materials, workers use different types of broaching tools that are specially designed to cut each shape. The division is quite simple and is done according to this principle.

Push and pull broaches

The first type of workpiece is tiny and cannot be used to handle heavy loads. It is more appropriate for small quantities. It is clamped in the broaching utensil and pulled through the work. Push machines are used with a simple arbor press. The pull type, as it names clearly suggests, is pulled up, down or even horizontally across the broaching teeth by a machine. It is specially used for sizing and finishing holes, cavities.

Working principle classification

In this category there can be included different machines such as hydraulic, mechanical and electromechanical tools. A hydraulic tool functions with the help of hydraulic pressure, while the mechanical one uses electricity as a power source in order to animate its various components. The electromechanical utensil is highly automated and can even be controlled by computers. In comparison to others it is more effective and precise.

Internal and external broaches

This refers to the inner surface of a round hole. The utensils are either semi-automated or fully-automated.  These are most commonly used for manufacturing internal gears. In the process, the workpiece is fastened into a peculiar holding and afterwards embedded in the machine. For external and internal keyways, a keyway broach is used to finish the surface. The cutting teeth are specially designed to bush or horn to fit the hole. Another example of internal apparatus is the burnisher. The burnisher has a slightly different functionality. It is used in order to polish the material, not for cutting holes. In addition to this, external utensils are those used for removing material from an external surface and define the contour.

Continuous machines

This apparatus is horizontal and vertical. The main functionality of this apparatus is to maintain the broach stationary so as to be able to move the material through the tool and cut. Thus, continuity is of the matter. Horizontal machines usually have two sprockets. Vertical pieces have platens mounted on a continuous chain.

In conclusion, the classification of piercing machines depends on the materials that we work with.  The machines have to move in a linear way so as to be easily manipulated by whoever works with them. Each tooth functions so as to make deep cuts and remove quantities of material from a specific surface. Each tool has its particular functionality. Almost any material, like aluminum, copper alloys and brass can be shaped by using one of the utensils mentioned above and obtain excellent surface finish.