Deep drawn presswork is the process of gradually forming a three-dimensional shape out of a piece of sheet metal by mechanically drawing the sheet into a forming die which cuts into the metal and eventually forms whatever shape is required for the product.
Generally speaking, a process is considered to be deep drawn once the depth of the drawn part is greater than its diameter. Depth is attained by the process of reduction, where the part is redrawn through a number of dies until the required cup or mould shape is reached. In most cases, the desired size and shape requires numerous reduction cycles.
Deep drawn presswork is a complicated process that may be complicated further if the materials used are not especially malleable. In some cases, because of the stress absorbed by the material during the process, annealing (a form of heat treatment) may also be required in prior to further reductions.
Aside from the fact that it tends to be more cost-effective, there are many other benefits of using deep drawn presswork.
Firstly, the process of deep drawn pressing enables the manufacture of highly functional end products that may be both lightweight and also extremely strong.
Another benefit is the ability to produce shapes with complicated geometries, such as cylindrical objects or those that need to be produced seamlessly out of one piece of sheet metal.
High volumes and consistency
Deep drawn presswork is also perfect for ensuring high volumes of component or finished product, as once the required die and tooling have been created, it is simple to repeat the process from batch to batch with total consistency, minimal downtime and very little upkeep.
Very often, products that require deep drawn presswork are objects used for storage, such as tins, filter bodies, canisters and so on. The process is also used for components and products used in automotive production, aerospace, the medical industry and many other large industrial sectors.