Forging
Production Technique
Closed Die Forging is a forging process in which dies move towards each other and covers the workpiece in whole or in part. The heated raw material, which is approximately the shape or size of the final forged part, is placed in the bottom die. The shape of the forging is incorporated in the top or bottom die as a negative image. Coming from above, the impact of the top die on the raw material forms it into the required forged form.
Open-die forging, also known as free forging, is the process of striking a hammer to deform a piece of metal, typically placed on a stationary anvil. Another approach is to use compression to press the metal between simple dies. These simple dies are typically flat, semi-round or V-shaped. Regardless of the die shape, the metal is never completely encased in the open-die forging process. The dies hammer or press the metal through a series of repetitions, altering the material until achieving the desired shape. Open-die forging is not recommended for complex shapes, and often requires further machining to complete the process since the dimensions produced by hammering during the open die forge process can be imprecise.
Technical details:
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For the closed die technique, the tolerances of steel forgings are according to standard EN 10243-1. In case of open die forging, tolerances are broader and need to be discussed with production.
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The weight can vary from 100 grams to weights of approximately 100 kg for closed die forging. For open die forging, the maximal weight is much higher (up to several tonnes).
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Complex geometries are not possible. Our engineers can help you to adapt your design in order to make your part suitable for forging.
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The minimal wall thickness depends on the design of the part but it is recommended to take at least 4 mm.
Materials
There are many different possibilities regarding material choice. In most cases, we use this technique for the production of steel and stainless steel parts. Almost all alloys are possible and our material scientists, can advise you on the most suitable material for your application.
