CNC-controlled automated press brake backgauge


X-Press press brakes can be equipped with two main CNC-controlled backgauge models; both are synonymous of robustness, accuracy and speed. Movements are carried out through expandable and flexible EtherCAT digital servodrives. Motors and drivers are manufactured by Panasonic Electric Works, who developed their application in cooperation with Gasparini.

Recirculating ball linear bearing with rack-and-pinion movement and no mechanical play ensure high and constant precision. The type of backstops and number of axes can be adapted to the type of process, part size, and number of working stations. In this way the most varied production needs are met.

press brake 2 axes X-R backgauge

Gasparini Backgauges: fast and accurate


The Gasparini backgauge system is made of a monobloc frame, movable on recirculating ball linear bearing, with hardened and precision-ground rack and pinion. Standard configuration includes X and R axes (depth and height), and is equipped with 2 manual backstops (also known as fingers), according to the machine length, mounted on linear guides. The RPS system is expandable also on existing press brakes and covers all combinations from 2 to 6 axes.

Backstops have an integrated anti-collision safety feature. Thanks to the Anti-collision System, the back gauge punch is unlocked in the event of shocks that could damage it or even make it lose its position. In this case, the operator can easily put the gauge back in its seat.

All back gauges, also in the basic 2 axes configuration, can be moved and repositioned without having to access the rear of the machine, with considerable advantages in time and safety.

Versatility


 

Adding Z1-Z2 axes, backstops can be moved crosswise to simplify positioning of parts with different lengths or when working on multiple stations. Brushless motors on EtherCAT bus guarantee extremely fast movements.

Should our part have offset or staggered resting points, you can add one backstop with an independent stroke with the X6 axis. By adding this axis, it is also possible to make conical bends up to 75°. In this case, shaped fingers provide three reliable resting points, to get a correct angle and bend position. To reach maximum versatility you can automate both backstops with X5-X6 axes, reaching an angle of 80° on oblique bends.

backgauge with X6 axis for oblique and offset or staggered bends
backgauge sheet metal retractile supports

Praticity in mind


With the Thin-support system (optional retractile back supports) even thinner sheets are always correctly positioned and guided.

By selecting the F function (avalable as an option on press brakes sizes from 50 to 330 tons), the operator pneumatically unlocks and moves the turrets toward himself without the use of keys or tools: the operator can now reposition the back gauges according to the new needs from his workstation.

Tower Backgauge: absolute power and precision


 

Tower backgauges are extremely sturdy and precise. They are suitable for heavy processing as well as any type of bending on X-Press ranging from 100 t to 2500 t. To ensure top performances, the back gauges are designed and manufactured with high-technology, sophisticated, and reliable components. Tower backgauges provide a wide handling range, easy oblique positioning, very high precision and the possibility to integrate back sheet lifters.

 

Tower backgauge consists of two or more 3-axis turrets, movable on linear guides through ball screws and AC brushless motors. This configuration, with independent trolleys and axes, enables any kind of positioning, does not limit any kind of inclination or conical bending, and furthermore allows the operator to make a large variety of movements within the machine itself. On the rear side of the machine, it is possible to install sheet followers, to support the metal sheet in a similar way as with front sheet followers. They are especially useful in case of very thin, wide, and/or heavy metal sheets.

RPG independent turret pressbrake backgauges
Backgauge
Characteristic Standard Advanced unit
X stroke 600 600 mm
Extended X stroke (optional) upon request upon request mm
X speed 500 500 mm/s
X accuracy ±0.1 (optional ±0.05) ±0.05 mm
X repeatability ±0.05 (optional ±0.02) ±0.02 mm
R stroke 200 (optional 250) 250 mm
R speed 250 250 mm/s
R accuracy ±0.1 ±0.1 mm
R repeatability ±0.05 ±0.05 mm
Number of stops (without Z1-Z2) according to machine length according to machine length
Number of stops (with Z1-Z2) 2 2
Z speed 900 1600 mm/s
Z accuracy ±0.25 ±0.25 mm
Z repeatability ±0.15 ±0.15 mm
X6 stroke ±150 ±150 mm
X6 speed 125 125 mm/s
X6 accuracy ±0.1 ±0.1 mm
X6 repeatability ±0.05 ±0.05 mm
X6 displacement angle 75 75 °
X5-X6 displacement angle 80 80 °
Minimum distance between stops 100 100 mm
Minimum distance between stop and side frame 200 200 mm
Minimum distance between manual stops 60 60 mm
Minimum distance between manual stop and side frame 100 100 mm
Tower Backgauge
Characteristics Value unit
X stroke 800-1000 mm
X speed 400 mm/s
X accuracy ±0.1 mm
X repeatability ±0.05 mm
R stroke 250 mm
R speed 250 mm/s
R accuracy ±0.1 mm
R repeatability ±0.05 mm
Z speed 500 mm/s
Z accuracy ±0.02 mm
Z repeatability ±0.01 mm

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