The art of shaping by blanking and punching

In the fascinating world of the metal industry, metal shaping represents one of the crucial steps in the transformation process. About the various methods available, cold forming of metals emerges as an excellent option, bringing with it numerous advantages over traditional hot processes.

At Prodotti EBI we specialise precisely in cold metal forming! Let’s take a detailed look at how the blanking and punching processes take place and the benefits of carrying out this type of cold working.

Blanking and punching: what they are and how they are done

Blanking and punching are two cold metal forming techniques that enable precise shapes and forms to be obtained from metal sheets. These processes are widely used in a wide range of industries, such as the automotive and agricultural machinery industries.

Blanking is a process by which a sheet of metal is cut into desired shapes using a die. The die consists of two parts: an upper and a lower part, both with the desired shape. When the metal sheet is placed between the two parts of the mould, a considerable force is applied causing the metal to deform along the contours of the upper and lower mould. This leads to the clean and precise separation of the desired part from the sheet metal.

Punching, as opposed to blanking, involves the use of a punch and die to create holes or openings in a metal sheet. The punch is a pointed tool that exerts a concentrated force at a specific point on the sheet metal, while the die supports the surrounding metal to prevent unwanted deformation. This process can be used to create holes of various shapes and sizes or to produce decorative or functional openings.


The advantages of cold metal forming applied to blanking and punching

Let’s take a look at the key advantages of cold metal forming, focusing on blanking and punching.

Increased precision: cold stamping and punching processes enable high precision in the shapes and holes produced. Tight tolerances and reduced thermal deformation associated with hot machining ensure that the resulting parts are consistent and conform to specifications.

Less material deformation: unlike hot working, cold deformation minimises material deformation. This preserves the mechanical properties of the metal and reduces the need for further straightening or correction processes.

Energy savings: cold forming requires less energy than hot processes, where metals have to be heated to high temperatures. This translates into lower operating costs and a reduced environmental impact.

Increased strength and hardness: cold forming can increase the strength and hardness of metals due to the effect of cold working on their structure. This can be particularly advantageous for applications where strength is crucial, such as automotive.

Better surface finish: cold processes tend to produce a smoother and more uniform surface finish, reducing the need for further machining to achieve the desired result.

Cold forming of metals by blanking and punching is a fundamental pillar in the metalworking industry. The precision, energy efficiency, preservation of mechanical properties and versatility of these techniques make them excellent options for meeting the needs of modern industrial applications.

Choosing cold forming not only leads to superior results, but also demonstrates a commitment to sustainability and innovation in metalworking.

Would you like to learn more about these processes and how they are carried out at Prodotti EBI?
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