Upset forging

The upset forging is a Enden- forming process for producing metallic long products such as nails, screws, rods, valve lifters or round steel anchors.

Upsetting process

Long round bars made of rolled metal are heated at the ends to forging temperature (for steel approx. 1,100 degrees Celsius) and reinforced by hydraulic (or mechanical) presses in one or more forming stages. To enable articulated connections, z. B. forged eyes or hammer heads with spherical contact surfaces. Other shapes such as cylindrical reinforcements, hexagon head, hexagon socket head, collar or plate can also be upset.

use

These reinforced ends can e.g. B. with threads that are now stronger than the shaft, so that the oversized anchor bolts can be connected via nuts or forks. By using right-hand and left-hand threads, several so-called round steel anchors can be connected to one another and tightened using turnbuckles.

In this way, particularly large anchor lengths can be achieved, such as those required for the construction of quay walls (connection between the harbor wall and an anchor wall rammed inland).

Eyes can be connected with bolts so that they are flexible enough to avoid bending loads. This safely prevents overloads and consequential damage.