Feeding straightener QPRVP

The feeding straightener is additional equipment used in press manufacture. It combines advantages of two stand-alone machines – a straightener of metal belt and a roll feeder. The feeding straightener performs straightening of metal belt decoiled of decoiler and accurate feeding this belt to a machine tool. It helps to shorten the overall length of a production line, which brings place and costs savings.

Mechanical realization

The feeding straightener QPRVP consists of a straightening mechanism, mounted on a frame, welded from metal sections and plates.

A frame of the straightening mechanism is made of two stand-alone side-plates, firmly connected to each other by four screws. In the side-plates, four bottom straightening, bottom input and output rolls are placed, mounted in self-aligning bearings. Input and output upper rolls are connected with guideways in the side-places; therefore opening of input or output rolls can be set. Compressive force of this rolls is generated by springs and can also be adjusted.

Relative height of upper straightening rolls can be set individually by rotating ball screws, placed in bronse bushes. Each pair of the corresponding ball screws is connected by chain for simultaneous rotating.

The rolls are powered by a servomotor. This rotational movement is transfered to the rolls by a belt pulley and gearwheels.

As standard, we attach input roll for shoring of metal belt before it enters the straightener. It can be used as bottom or upper roll, in accordance to how the metal belt is decoiled of a decoiler. Side belt alignment is done by two vertical hardened rolls, whose position is adjustable according to belt width.

Feeding straightener control

Main rotating movement is made by servomotor with gear manufactured by LENZE. PLC motion controller controls this motor. Accurate length feedback is ensured by small wheel pulled on the feeded belt by a spring. Feed parameters are displayed and can be set via touch display located on the front panel.

List of basic parameters, which are possible to set via display:

Parameter Possible range Unit
Feed length 0,1 – 9999,9 mm
Feed velocity 1 – 99 %
Number of feeds 1 – 99999 ks
Number of feeds(2nd counter) 1 – 99999 ks
Press stroke launching modes Single stroke, Continuous
Starting and ending feed angle 0 – 359, 0 – 359 °
Starting and ending freeing angle 0 – 359, 0 – 359 °
Digital cam (relay contact) 0 – 359, 0 – 359 °
Feed accuracy testing 0 – 359 °

Additional equipment

In the case of customer interest, we offer following additional equipment to the feeding straightener:

  • Pneumatic control of input/output rolls
  • Additional checks according to customer needs
  • Additional electronic cams for co-operating machines in automation line
  • Side-straightening of metal belt
  • Check for belt ripple between the feeding straightener and a machine tool (useful when narrow or thin metal belt is feeded)
  • Portable control panel for comfortable belt loading in forming press working area
  • Multiple feeding of different lengths in a row, “receipts” for manufactured parts


We also offer non-standard equipment (additional sensors, special-shape forming rolls, etc.). Our products are tailor-made solutions, effectively integrated into production and forming process.

Feel free to contact us for getting additional information.

Technical parameters

QPRVP 160/6 QPRVP 500/3
Max. belt width [mm] 160 500
Max. belt thickness [mm] 6 3
Max. feed length [mm] 1,0 – 9999,9 1,0 – 9999,9
Max. feed velocity [m/min] 45 45
Feed accuracy [mm] 0,1 0,1
Rolls diameter [mm] 80 80
Feed height adjustment [mm] +/ 50 +/ 50
Max. power requirement [kW] 3,2 3,6
Length [mm] 986 986
Width [mm] 710 780
Height [mm] 1 320 1 500
Weight [kg] 530 683



Automation line with QPRVP 160/6
Automation line with QPRVP 160/6
Feeding straightener QPRVP 160/6