Forming of material

Pressing of metal sheets

This cold-manufacturing operation permanently deforms the material at different angles in the desired direction as a result of a bending moment. This technological sequence does not significantly change the material's profile. The Unex a.s. owns two eccentric presses and two hydraulic presses.

 

Bending metal sheets

We bend metal sheets into various shapes with the maximum angle much larger than 90°. Only thin-walled sheets can be bent with this method (up to 3, 4 mm).  UNEX a.s. owns one hydraulic press for bending sheets.

 

Roll-bending

It concerns free bending of an element - annuluses, drums, etc.  They are of a circular profile. Even conical sheets can be roll-bent. Thin-walled sheets are roll-bent on four-cylinder roll-bending machines, thicker sheets on symmetrical three-cylinder roll-bending machines. UNEX a.s. owns two three-cylinder symmetrical roll-bending machines and one four-cylinder roll-bending machine.

 

Roll-bending of profiles

It concerns a free bend, the elements - profiles are roll-bent to a required radius. The maximum size of the profile can be roll-bent with regard to the machine's output. UNEX a.s. owns one three-cylinder profile roll-bending machine with vertical cylinder mounting.

 

Hydraulic pipe bending machine

The material is permanently deformed on a former. Turning the former with an inserted pipe bends hollow profiles into the required, technologically acceptable radius. The following are the most important parameters for feasibility of a particular bend and its good quality: the external diameter, wall thickness, bend radius of the neutral axis and the quality of the bent material.  UNEX a.s. owns one hydraulic press for hydraulic bending of pipes.

 

Flattening of sheets on flattening cylinders

It concerns alternating bending by a set of driven cylinders. The greatest bending occurs on the first cylinder at the intake end of the machine; at the output end, the bending only occurs in the area of elastic deformations. UNEX a.s. owns two machines for flattening sheets.