Stainless steel stamping - Information & advices - Stellinox

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The metal stamping process is a technique used in the metallurgy industry to deform a flat metal sheet into a three-dimensional shape.

Everything you need to know about the stainless-steel stamping process

Deep drawing is an industrial process that consists of giving volume by deforming the material without heating, i.e., metal sheets, with tools and dies, and is part of the metal forming and transformation techniques (assembly, drawing, rolling, bending, stamping, metal sheet work, etc.). This technique is used to manufacture small, medium and large series in industry, and in many sectors of activity: whether to manufacture small metal parts or large parts such as the side of a vehicle for example.

In order to deform the metal parts without breaking, powerful mechanical or hydraulic presses are required, with more or less slow stamping speeds. The greater the deformation, the more precise the stamping tools must be and the slower the press must work to avoid breaking stainless steel. The machines are hydraulic presses, which have a power of several tens or even hundreds of kg of force, up to thousands of tons. For this manufacturing process, the metal sheets (stainless steel, aluminium, copper, brass, alloys) are clamped between a punch (punching) and a die, in order to deform without breaking when the punch and the die advance, in opposite directions.

Stamping consists of the progressive deformation of a metal sheet, or a strip of metal, i.e., a cut-out piece of metal that suits the shape of the tooling used. Stamping, another metal deformation technique, consists of moving a volume by "printing" to the metal, by instantaneous static striking, either cold or hot. It is also known as forging in the industrial context of steel.

Stainless steel stamping at Stellinox

At Stellinox company, manufacturing in France, there are 6 hydraulic presses with a capacity of up to 250 tones, for the production and manufacturing of medium-sized stainless-steel parts. Stellinox owns tooling and dies for each model of part manufactured. The manufacture of a plate to be stamped begins with the design of a mould.

Stellinox stamps trays and plates with a depth of up to 11 cm. At this level of deformation of the steel sheet, the process is very slow so that the metal is stretched without breaking. On the stamped parts you can see very clearly on the outside where the metal has been drawn. The sheet, which was rectangular from the start, is deformed. It is now time to move on to the stamping or cutting phase, which is carried out on mechanical presses (cutting machines) or by laser cutting.

Stellinox also carries out punching operations, which consist in cutting steel strips using special tools.

Stellinox, which has experience in stamping since , is your supplier for the production of quality products made in France for all your stainless-steel dish models.

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Types of Metal Stamping

There are three major types of metal stamping techniques: progressive, fourslide and deep draw.

Progressive Die Stamping

Progressive die stamping features a number of stations, each with a unique function.

First, strip metal is feds through a progressive stamping press. The strip unrolls steadily from a coil and into the die press, where each station in the tool then performs a different cut, punch, or bend. The actions of each successive station add onto the work of the previous stations, resulting in a completed part.

A manufacturer might have to repeatedly change the tool on a single press or occupy a number of presses, each performing one action required for a completed part. Even using multiple presses, secondary machining services were often required to truly complete a part. For that reason, progressive die stamping is the ideal solution for metal parts with complex geometry to meet:

• Faster turnaround
• Lower labor cost
• Shorter run length
• Higher repeatability

Fourslide Stamping

Fourslide, or multi-slide, involves horizontal alignment and four different slides; in other words, four tools are used simultaneously to shape the workpiece. This process allows for intricate cuts and complex bends to develop even the most complex parts.

Fourslide metal stamping can offer several advantages over traditional press stamping that make it an ideal choice for many applications. Some of these advantages include:

• Versatility for more complex parts
• More flexibility for design changes

As its name implies, a fourslide has four slides &#; meaning that up to four different tools, one per slide, can be used to achieve multiple bends simultaneously. As material feeds into a fourslide, it is bent in quick succession by each shaft that is equipped with a tool.

Deep Draw Stamping

Deep drawing involves pulling a sheet metal blank into the die via a punch, forming it into a shape. The method is referred to as &#;deep drawing&#; when the depth of the drawn part exceeds its diameter. This type of forming is ideal for creating components that need several series of diameters and is a cost-effective alternative to turning processes, which typically require using up more raw materials. Common applications and products made from deep drawing include:

• Automotive components
• Aircraft parts
• Electronic relays
• Utensils and cookware

Short Run Stamping

Short run metal stamping requires minimal upfront tooling expenses and can be an ideal solution for prototypes or small projects. After the blank is created, manufacturers use a combination of custom tooling components and die inserts to bend, punch or drill the part. The custom forming operations and smaller run size can result in a higher per-piece charge, but the absence of tooling costs can make short run more cost-efficient for many projects, especially those requiring fast turnaround.

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