Whether for vessel construction or the production of line pipes: Graebener® 3-roll bending machines work fast and reliably. They stand for optimum bending results customized to the individual demands of your market. Especially concerning the production of vessel shells and cones with very large wall thickness and increased length, the 3-roll bending machine is the most economic solution up to today.
Our experience as manufacturer of economic roll bending machines goes back more than 40 years. Since then, we have continuously been enhancing our individual solutions following the ever increasing marked requirements. Graebener® roll bending machines can also be used reliably for the bending of conical pipe sections or the straightening of plates.
Plate width (pipe length): | up to 12.2 m |
External pipe diameter: | up to 10 m |
Wall thickness: | up to 200 mm |
The concepts of the Graebener® roll bending machines are based on decades of experience, in the area of roll bending machines even reaching back as far as the 1970ies. As special machine builder our aim for each project is to use this experience to design an individual concept which is ideally customized to your requirements.
Depending on the respective type of application your solution is based on either of the two different basic concepts. Both concepts are engineered as simple and robust construction which mainly consist of the three rolls, both columns (tilting bearing column and pivoting bearing column) for the reception of the rolls, the drive column for the installation of the roll drives and the base frame. The machine type GDR has been developed especially for rather short pipe sections respectively shells with large wall thickness and the option to also process cones. The machine type GDR-L has been developed for the production of long pipes with small wall thickness in the line pipe industry.
A Graebener® solution is a holistic solution. Therefore, we have developed a handling system for your Graebener® roll bending machine which is ideally suited for straight as well as conical pipe sections and can be applied without further crane handling.
To ensure an optimum bending result for each type of application – even when processing cones – the plate support tables can be adjusted to the respective wall thickness vertically as well as horizontally. Whereas the height adjustment supports the plate during the bending process, the horizontal adjustment ensures that the shell sections are perfectly aligned to the bending axis of the machine and exactly centered below the top roll during each bending step.
Whether for continuous roll bending or pre-bending: the Graebener® plate handling system ensures the exact positioning of the plates while at the same time providing maximum support during the bending process.
