Introduction to Machining – geeksforjobs


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Machine CNC Milling Machine. Cutting Metal Modern Processing Technology.

Machining is a material removal process. Machining is used to obtain the exact dimension of the component. This is a final finishing process operation to achieve the desired design product.

Words involved in machining:

-> Tools

-> Cut Depth

-> Feed

-> cutting speed

-> Feed Points


The component that is used to remove the material is called a tool. The tool will be in contact with the workpiece. The sharp edges of the tool used to cut external material. The tool is classified into two types based on the number of touch points, the tool and the workpiece. They are 1. Single point cutting tool, 2. Double point cutting tool.

depth of cut

This is the distance from the perpendicular to the workpiece to the axis (spindle / axis of rotation). Units are “meters” or “centimeters”.

The feed is the distance running parallel to the tool for one revolution of the workpiece. Units: One revolution per milli meter.

Feed marks

Due to the contact between the tool and the workpiece, marks will be generated on the workpiece during the machining process. These marks are called feed marks. The composition of the feed mark depends on the type of equipment and the speed of rotation of the workpiece in relation to the equipment.

cutting speed

The speed at which the workpiece rotates is called the cutting speed. Units: centimeters per second.

Machining is classified into two different categories based on physical interactions between machining tools and components.

They are:

1. Conventional Machining

2.Un-traditional machining

Conventional machining

In traditional machining, the tool must be in contact with the workpiece. This type of machining requires only mechanical energy. And the strength of the tool must be greater than the strength of the workpiece. In this machining, the tool is made of “tugsten carbide”, so potentially the strength of the tool will be greater than the workpiece. The amount of force must be greater to achieve the desired output. And this type of machining has a higher material removal rate than other types of machining. The surface finish is lower in this conventional machining. And conventional machining is less expensive when compared to non-conventional machining. Conventional machining is chosen at the initial stage of the finishing process of the component. It is a traditional

Non-traditional machining

Non-traditional machining is a non-traditional machining process. In this non-traditional machining process, the tool must not be in contact with the workpiece. Here electrolysis and electrochemical, water and jet energy are used for the material removal process. In this process, the strength of the tool may be less than the strength of the workpiece. And such machining does not require much external force or mechanical. The non-traditional machining process has low material removal rate. And this type of machining has higher surface finish. It is more expensive than the traditional machining process. The final finishing process can be done by non-conventional machining.

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