Controlling vibration and accuracy

Troisdorf-based Mannstaedt, a specialist in the production of hot-rolled special profiles, recently sought a high-quality clamping device for its heavy-duty machining operations, duly finding the solution from gripping and clamping technology expert Röhm.

At Röhm, customer-specific developments comprise around 40% of business. In this case, the special HZS-798×180 high-pressure vice includes an integrated measuring system, while the active pull-down is controllable, reaching up to 60 kN per clamping jaw. These high-pressure clamps have been used in duplicate for around three years on a machine with a working space of around 1 m.
“We are now able to master vibrations safely and achieve the high dimensional accuracy that we want,” confirms Björn Wieschendorf, operations manager for processing.
Due to this experience, Röhm was again the first choice as a clamping device supplier when an older system was replaced in 2019 on a Matec milling machine. This has 3 m of work space, is suitable for automated processes and is equipped with a total of four HZS-798×180 vices. For heavy workpieces, the machine can be loaded from above using a crane, while lateral feed is also possible for automated processes, for example.
The main advantages of this clamping technology compared with the previous product include better repeat accuracy, greater clamping forces and higher rigidity within the clamp. Discussions are currently underway to replace a manual clamping technology solution with an automated system.
HZS-798×180 clamping devices work centrically and achieve an accuracy of 0.03 mm. Active lowering of workpieces can be controlled up to 150 bar hydraulic actuation pressure, while the 170 kg clamps for precision and blank clamping can be moved on the machine and are suitable for workpiece automation.
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