Folding Technologies

Material-friendly Part Flow

Pivatic uses bending technology where the bending process is carried out using folding technology which is most suitable for sensitive materials. The material moves between stations without being scratched or dented.

The bending process is efficient because the folders bend negative and positive angles set for each edge of the work piece, and the sides and the ends are bent at the same time. Also, there is no wear on tooling. The bending tools and the hold down tools are all engineered in-house according to the geometry of your parts, to minimize or eliminate the need for tool changes.

The process is more flexible as negative and positive angles, dimensions, and sequences are all programmable. PivaBend processes different work pieces one-off and as large batches. The automated tool change system eliminates manual setups between batches. It is possible to integrate PivaBend to other processes such as spot welding and clinching.

The first PivaBend wing forming machine was launched to market in 1989. It has been further developed without changing the working principles, which now pays off with high machine uptime. A Siemens line controller and standard components secure the reliability.

Material Specifications

PivaBend folding benders are designed for steel thickness up to 2 mm (0.078”), and applied for blank size up to 3 000 x 1 500 mm (120 x 59”). Pivatic also provides MPB benders which are capable of bending up to 4 mm (0.157”) material thickness and blank lengths up to 8 000 mm (314”). PivaBend is suitable for materials with sensitive surfaces such as pre-painted stainless steel and aluminum.

Long-side Benders FLN / FLW

The long-side benders FLN (Folding Long Narrow) and FLW (Folding Long Wide) are designed to bend either only upwards or upwards and downwards. They are always controlled with the CNC.  Benders are servo electric for thin material and hydraulic for heavy-duty applications. They are selected according to the type of material, material thickness, and main dimensions of the work pieces.

PIvaBend FLN

PIvaBend FLW

PivaBend FLN consists of two stationary bending machines. It has CNC feeders for transporting and positioning of the work piece. This layout allows two blanks to be bent at the same time. To ensure correct positioning, blanks are positioned against corner notches prior to the bending cycle. PivaBend FLW consists of a separate positioning device, two traversing bending machines and CNC feeders for transportation of blanks. Both sides are bent simultaneously for reduced cycle time. Blanks are referenced prior to bending leading the tolerances to the first bend.

BenderMax. Material ThicknessMax. Part LengthMax. Bending AngleMin. Bottom WidthMax. Return Flange
FLN225Mild Steel 2.0 mm / 0.078”
Stainless Steel 1.50 mm / 0.057”
2250 mm /
88”
Up- and downwards ±110°230 mm40 mm
FLN300Mild Steel 2.0 mm / 0.078”
Stainless Steel 1.50 mm / 0.057”
3000 mm /
120”
Up- and downwards ±110°230 mm40 mm
FLW225Mild Steel 1.25 mm / 0.049”
Stainless Steel 0.75 mm / 0.029”
2250 mm /
88”
Up- and downwards ±110°260 mm40 mm
FLW300Mild Steel 1.25 mm / 0.049”
Stainless Steel 0.75 mm / 0.029”
3000 mm /
120”
Up- and downwards ±110°260 mm40 mm
Blank width up to 1 500 mm / 59”.

 

Short-side Benders FSW / FST

PivaBend FSW (Folding Short Wide) benders are the standard for end bending in Pivatic. The FSW consists of two traversing bending machines with part positioning. Both sides are bent simultaneously for reduced cycle time, and they can be bent upwards or downwards. The transportation from long side benders to the short side benders can be in straight line or in a 90˚ angle, depending on the preferred layout for the factory area. In a straight line, a turning table is added for turning the part in the right orientation. Benders are servo electric for lighter gauge and hydraulic for heavy-duty applications. They are selected according to the type of material, material thickness, and main dimensions of the work pieces.

PIvaBend FSW

PIvaBend FST

The PivaBend FSW can be equipped with an automatic hold down tool organizer for different part widths. The change from one part width to another is done automatically by the line controller system.

PivaBend FST (Folding Short Through) benders are run-through end benders for longer parts, up to 8000 mm / 314”. The FST station consists of a positioning device, feeding gripper, FST bender, and the pulling gripper. The FST can only bend upwards.

BenderMax. Material ThicknessMax. Part WidthMax. Bending AngleMin. Bottom LengthMax. Return Flange
FSW125Mild Steel 2.0 mm / 0.078”
Stainless Steel 1.50 mm / 0.057”
1250 mm /
49”
Up- and downwards ±110°400 mm35 mm
FSW150Mild Steel 2.0 mm / 0.078”
Stainless Steel 1.50 mm / 0.057”
1500 mm /
59”
Up- and downwards ±110°400 mm35 mm
FST125Mild Steel 2.0 mm / 0.078”
Stainless Steel 1.25 mm / 0.049”
1250 mm /
49”
Upwards +90°400 mm35 mm
FST150Mild Steel 2.0 mm / 0.078”
Stainless Steel 1.25 mm / 0.049”
1500 mm /
59”
Upwards +90°400 mm35 mm
The maximum height of bends is 120 mm. When corner tools are used maximum height is up to 80 mm.

Box Benders FSO / FSO-C

Instead of welding 3 parts together to form a U-profile, PivaBend FSO (Folding Short Open) box benders can be used to form Casings from 1 part. The original PivaBend FSO is an open-frame machine with a height limitation of 2000 mm / 78” of the sections. A variant of this, the C-framed PivaBend FSO-C, is available and feasible to use when there are only upward bends, the cycle time allows it, or when the factory floor space is limited. The ends can also be bent in the FSO-C instead of including an FSW short side benders. The FSO-C has a section height limitation of 725 mm / 28”.

PivaBend FSO

PIvaBend FSO-C

BenderMax. Material ThicknessMax. Part LengthMax. Bending AngleMax. Section HeightMax. Return Flange
FSO125Mild Steel 1.25 mm / 0.049”
Stainless Steel 0.75 mm / 0.029”
1250 mm /
49”
Upwards +90°2000 mm35 mm
FSO150Mild Steel 1.25 mm / 0.049”
Stainless Steel 0.75 mm / 0.029”
1500 mm /
59”
Upwards +90°2000 mm35 mm
FSO125-CMild Steel 1.25 mm / 0.049”
Stainless Steel 0.75 mm / 0.029”
1250 mm /
49”
Upwards +90°725 mm35 mm
FSO150-CMild Stee l1.25 mm / 0.049”
Stainless Steel 0.75 mm / 0.029”
1500 mm /
59”
Upwards +90°725 mm35 mm

The PivaBend FSO and FSO-C can be equipped with a similar-type automatic hold down tool organizer for different part widths than what is used in PivaBend FSW. The change from one part width to another is done automatically by the line controller system.

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