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Entrust forge machining to SMEPI

The forge machining works are delicate operations which must be carried out expertly to guarantee the quality of the parts to be created. This is why it is essential to choose the professional to whom you will entrust this task. SMEPI's many years of experience in the manufacturing of precision, wear and safety mechanical parts make us a reliable partner for all types of related projects.

What does the machining of forge parts involve?

The goal of the forge is to produce pieces of various shapes by deformation. You can use different alloys, metals and at different temperatures. At the end of the process, you get a rough forged part that can be transformed to suit your needs. To do this, SMEP Industries can use the following different forging machining processes:

Stamping and die-forging

This process consists of hot, pressure or impact forming. Using a power hammer or press, you obtain a die that reproduces the desired shape. The term stamping is often used for parts made of ferrous metals, to create parts of non-ferrous alloys like alloys of copper, aluminum, nickel, etc.

Cold or semi-hot forging

Cold forging is also called extrusion. The goal is to make parts by using tools to force the metal to flow in one or more directions, without the need for prior heating. In other words, it is about creating the shape of a matrix at room temperature thanks to a very strong pressure. This improves the characteristics of the metal.


Free Forge

Free forging machining is a process consisting in making parts, hot, without the need to use specific tools. It is done via a succession of progressive deformations in order to rapidly produce single units or in very small series.


Rolling or circular rolling

Rolling is the act of deforming the metal between two rolls rotating in opposite directions. This makes it possible to crush the metal and allow it to take the shape of the desired tools. Rolling is mainly used to preform parts before stamping operations.



With regard to bending, the objective is to use a mechanical process, cold or hot, to obtain the desired curvature of a tube, bar or section, while respecting a radius and an angle.

Shot blasting

This kind of forging machining aims to remove scale from forged parts by throwing small balls at high speed. This process can have a beneficial effect, in particular to make the metal more resistant to mechanical stresses.


Heat treatments

Large variations in temperature can change the microscopic structure of the metal. This process is often used to soften the metal and then make it more homogeneous by means of high temperature annealing.

Surface treatments

The purpose of surface treatment is to modify the physical and mechanical properties of metals on the surface. This, in order to improve the resistance of the metal to the attack of oxygen (corrosion). To do this, it is necessary to deposit layers of metal capable of blocking the passage of oxygen, while improving the mechanical properties and the resistance of the part to friction.


Calibration is a forging machining operation allowing to size a small part of the forged part, which is often flat. It is carried out cold, using simple specific tools. In the end, you get metals with high tolerances and a good surface finish.


Polishing is considered a process of finishing parts. The objective is to obtain a very high quality surface finish; a surface characterized as shiny, rough, glowing, etc. Note that this process can be performed manually or by a robot.

Machining and turning

The term machining consists of removing material in order to give the blank to the desired size and shape. High precision parts are then obtained, thanks to the use of milling machines or numerically controlled lathes. If you want to know more about this forging machining process, contact the SMEP Industries team.

Why trust us ?

Since 2001, SMEPI has created precision, wear and safety parts, as well as fasteners (screws, studs and bolts) for high-tech industries such as energy, railways and even aeronautics its core business. We have a perfect mastery of classical machining techniques or forging machining of the various metals and metal alloys used in these delicate sectors.

We are thus able to ensure the quality of the parts for which you entrust us with the manufacture, but also their compliance with the various standards applied in each field of activity. Whatever your needs or your projects, you can confidently turn to our specialist advisers for the study and design of solutions that will meet them in the best way. They will be able to take into account your expectations, but also the technical, chemical, mechanical or environmental constraints relating to the future use of the elements to be made.

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