1. Composition of the Back Gauge on Press Brake
The back gauge of the press brake is made up of a beam and a screw. It also has a finger and a guide rail. Back gauges of bending machines with different principles are also made differently. Let’s introduce each one.
1.1 Differences in composition between torsion bars and proportional valve electrohydraulic press brake
Torsion bar press back brake gauge
The grooves are designed on beams of ordinary iron, screw rods and guide rails of the torsion machines to facilitate the sliding of fingers. Manual adjustment is possible for the two-point block fingers.
Back gauge for electro-hydraulic proportional press brake:
Ball screws and linear guiderails are used to improve the accuracy of movement on the back gauge. On the beam, double linear guide rails have been used. Adjustable manually, automatically, and electrically.
Differences in accuracy between CNC press brake and torsion bar
The back gauge on the torsion-bar press brake has poor positioning accuracy. The repeat positioning accuracy of the torsion bar press brake is also poor.
The back gauge can achieve a positioning accuracy of +-0.00078″. The repeated positioning accuracy is +-0.0006″.
The back gauge speed for the CNC type is double that of torsion bars.
2. What is the purpose of back gauge axis?
2.1 Axes number
The back gauge for the press brake can be equipped with X1, R1, R2, Z1, and Z2.
The X-axis controls back gauge movement.
The R axis controls how the back gauge moves up and down
The Z-axis controls how the back gauge moves horizontally along the beam.
- X1, R1, R2, – Z1, Z2 mean that the computer can control the movement of the two fingers together or separately.
Why would you need an R-axis?
After bending, the height of stopper must be adjusted if the workpiece is complex. The R axis will be needed at this point.
The R axis is adjustable manually. However, it is difficult to adjust and takes a long time. The effect is better if the R axis has a dro readout device.
A digital readout is installed on the manual press brake by someone who wishes to retrofit it. It is better to have the computer automatically adjust, as it will be more precise and efficient.
Why would you need the Z1, Z2 axis of a compass?
You will need to adjust the calibration block if the machine has a length of 3000mm but you want to bend a workpiece that is 200mm.
The computer can control the movement of the backgauge fingers if the Z1 and Z2 are controlled by it. It is faster and more efficient.
When would you use a 6-axis?
The 6-axis backgauge is referred to as X1, R1, R2, Z1, and Z2. Two modules separate the back gauge. The modules can be moved up, down, to the left, to the right, or backwards. They can also move independently. The fingers must be positioned asymmetrically when bending the asymmetrical workpiece to be able fold the piece. The two fingers must be moved independently to stagger their positions.
It is equipped with a DA66T or MODEVA19T CNC system, which allows for stress-free bending. The bending process is made stress-free with the DA66T or MODEVA19T system.
