Annual report 2009 - Siempelkamp

Our straightening presses process heavy plates, slabs, and bars. Next to classic solutions providing a press force of 1,500 to 2,500 t,
we also offer concepts with a press force of up to 6,500 t (7,165 US tons).
Siempelkamp pipe-forming presses manufacture large-sized, longitudinal-welded pipes for pipelines. During the crimping, U-forming,
and O-forming processes a press force of up to 720 MN is applied. These presses get the job done when it comes to the production of
large pipes for pipelines and offshore applications. Due to the automatic ram parallelism control of our pipe forming presses, even pipes
with a length of up to 18 m (59 ft) are produced with high precision.
For many applications our presses have become an integral part, for example, presses for heat exchanger plates which are used in
the food industry. Special parts used in the aerospace industry are manufactured on our rubber pad presses. These presses operate
according to the Guerin process with up to 260 MN.
Our hydro-forming presses economically produce complex workpieces. This complexity relates to both longitudinal and cross sections.
Typical examples include chassis parts, branching elements of tubes, and frame and exhaust parts for the automobile industry. For rear
axle members, lightweight frames or large series production, our presses are designed to meet the needs and general conditions of our
customers.
Straightening press Dillinger Hütte
Straightening press for Dillinger Hüttenwerke AG
In July 2009 we started the installation of a new heavy-plate
straightening press for the heavy-plate rolling mill facility at
Dillinger Hüttenwerke AG. This press is designed for high-strength
rolled plates with a thickness ranging from 50 to 300 mm. These
plates have a width ranging from 1,000 to 5,200 mm, are up to
19,000 mm (62 ft) long and can weigh up to 60 t (66 US tons).
The upper bolster of the press is equipped with two movable
rams that have a press force of 32.5 MN each. Their cylinders are
servo-hydraulically controlled. Each cylinder pair can be moved
individually or simultaneously. Mounted beneath each pair of
cylinders is an individual ram tool for straightening. A special
feature: An aligning tool allows the connection of both hydraulic
cylinder pairs. By using the aligning tool, 100% of the press force,
65 MN, can act on the plate.
The maximum straightening force can be applied up to the plate
edges which means up to 2,600 mm (8.5 ft) from the press
center line.
Siempelkamp supplies the new press as a complete package
including installation and start-up. Our straightening specialists
are supporting the commencement of production at Dillingen.
Furthermore, the scope of supply also includes the supporting
equipment for the manipulating, lifting, lowering, and transversing
of the plates. The entire oil-hydraulic and electronic
controls for the straightening press were also designed and built
at Siempelkamp.