CNC Press Brake Back Gauge System
Product Description
CNC Press Brake Back Gauge System
The Back Gauge System in a CNC press brake is a critical component for ensuring precise and repeatable bending operations. It positions the workpiece accurately in the X, R, Z, and sometimes Delta axes to define where the bend will occur.
1. Back Gauge Fingers
Back gauge fingers act as mechanical stops to position the metal sheet precisely before each bend.
Functions:
Ensure consistent bend lines across multiple parts.
Reduce setup time and operator error.
Move in multiple directions depending on axis configuration (X, R, Z1/Z2).
Features:
Hardened and replaceable tips.
Anti-scratch design for sensitive materials (e.g., stainless steel, aluminum).
Adjustable height for material thickness or different die openings.
2. Guide Rails & Slides
These components guide the back gauge fingers smoothly and precisely along the desired axis (typically X and R).
Functions:
Provide high-rigidity linear motion.
Allow for smooth, vibration-free travel.
Enable precise alignment of the gauge fingers.
Common Designs:
Linear guideways with recirculating ball bearings.
Precision ground shafts and preloaded carriages for backlash-free motion.
3. Drive Units
These are responsible for powering the back gauge movement.
Typical Drive System:
AC Servo Motors + Ball Screws for precision and speed.
Multi-axis drive: X (depth), R (vertical), Z1/Z2 (left/right), Delta X (independent finger movement).
Automatic positioning via CNC controller (e.g., Delem, ESA, CybTouch).
Features:
Fast positioning with high repeatability (±0.01 mm).
Programmable in CNC control for complex bend sequences.
Suitable for multi-step or staged bending operations.
Common Back Gauge Axis Configuration
| Axis | Function |
|---|---|
| X | Forward and backward movement (depth stop) |
| R | Vertical movement (height adjustment) |
| Z1/Z2 | Lateral movement of individual stops |
| Delta X | Independent left/right stop movement for tapered bends |
| X1/X2 | Dual independent front-back control for asymmetrical bends |
Integration with CNC Controller
Automatically adjusts back gauge position according to programmed bend sequence.
Compatible with 2D/3D simulation software (bend order calculation).
May include collision detection and tool interference avoidance.