REBAR BENDING MACHINES

The rebar bender type G-STAR Series is equipped with a sophisticated bending system, which employs a retractable bending pin, located on the rotating plate enabling re-bar feeding during bender back motion, thus increasing the production capacity and minimizing the moving bending parts.

 

Furthermore, due to smart bending head design and the location of the cutting tool -in relation to the bending tool- cutting is achieved without re-bar(s) reversing.

 

The straightening system found on the G-STAR range of rebar benders has two straightening devices and uses a number of unique features, which ensure excellent straightening and smooth re-bar feeding.

 

The two straightening devices are placed at 90° to each other and they have multifunctional characteristics, as every set (upper and lower) of straightening rollers perform a number of crucial operations.

 

Looking deeper into the straightening operation, a powerfull geared servomotor is responsible for transmitting power to every lower straightening roller. With this technique, the straightening force is evenly distributed along the full contact line between the re-bar and the rollers, thus achieving smooth feeding without imposing excessive force, which marks and damages the re-bar.

 

In addition to the power transmission functionality of the lower rollers, the upper rollers of both straightening systems have the ability to rotate on their vertical axis in proportion to the re-bar direction, thus compensating for any twist or internal stresses found on the processed re-bar.

The mechanics behind this feature are rather simple: Depending on the direction of the axial twist of the rebar, a centrally adjusting mechanism imposes an opposite angle to the lower roller, thus eliminating any tension and /or twist and ensuring the production of flat stirrups.

 

Concluding on the straightening system, all G-STAR benders are equipped with a fast an accurate diameter changeover device, (“Hexagon Shaft Pre-setting System”), where all rollers are adjusted at once using the preset markings, for every processed diameter. For advanced operation a motorized automatically adjusting system is optionally available.

 

Heading towards the bending head after the straightening devices, an additional anti-twist mechanism is available. This is the latest addition to the list of advanced -patented- features found on the G-STAR range and it is known as the Automatic Torsion Eliminator (ATE). A set of pneumatically activated moving grippers, prevent the re-bar from twisting while feeding and bending.

 

However, the most well-known feature of the G-STAR benders is the 3-D bending capability. Optionally available on any G-STAR model an additional bending system can produce three-dimensional bends, eliminating the need of secondary bending operations and giving realistically unlimited shape possibilities.

 

 

The 3-d bending head found on this G-STAR rebar bender uses a retractable twin roller design for unlimited shape possibilities. (patent)

 

EUROBEND GmbH successfully combines all the above unique features with user-friendly and reliable software, making every G-STAR bender easily controlled and operated without requiring any programming skills.

 

The main operating software has also a self-diagnostic feature checking all operations of the bender and preventing breakdowns. Furthermore, due to the hardware installed, it is possible to connect the computer of the bender over the internet and run maintenance checks and trouble-shooting from our service centers in real time mode.

 

Finally, in order to cover even the most challenging production demand, EUROBEND GmbH offers a full range of additional items, from coil handling and feeding, to output storage:

 

Powered pay off stations: With capacity of 3tn and 5tn equipped with tension detector and a geared three-phase motor, for smooth de-coiling and re-bar feeding.

 

Tilting pay off stations: In places with height limitations and/or restrictions, the hydraulically operated pay off station allows the loading of each coil horizontally, close to the ground level.

 

Powered pre-straightening units: Bringing the beginning of each coil from the pay off station to the G-STAR bender, it can be difficult, time and labor consuming especially when processing re-bar with diameters above 12mm. The powered pre-straightening unit acts as an intermediate device between the pay off station and the bender and feeds effortlessly -through a set of powered straightening and feeding rollers- the beginning of the coil directly to the machine. Regardless of how far the pay off station is located in relation to the machine, this unit makes the loading of the re-bar a matter of seconds.

 

Helical/Ring forming attachment: Add-on forming device for the production of circular stirrups and ring spirals. This device practically transforms the G-STAR bender to a ring spiral machine.

 

Straight bar collection station: The straightening quality achieved and the flexibility of the bender, allows the use of the G-STAR as a straightening and cutting machine processing either one or two re-bars simultaneously, depending on the capabilities of the model. The collector (available in lengths of 3m, 6m and 9m) provides excellent storage for straight bars or bars with one-side bends.

 

Bending table Inclination mechanism: When producing oversized stirrups, this hydraulically operated mechanism tilts the bending table of the machine, providing the required extra space and support. Titling is possible during machine operation.