CNC Bending
Accurate, repeatable bends - angle after angle, batch after batch.
CNC press braking forms sheet metal into precise angles and profiles with computer-controlled repeatability across every batch.
Overview
CNC bending uses programmed control to set positioning and bend angle precisely, forming flat sheet into V-shapes, U-shapes and multi-segment geometries. Unlike die bending in a press, it requires no expensive dedicated tooling and offers fast changeover; with springback compensation it delivers accurate, repeatable angles, making it ideal for high-mix, low-volume and large sheet metal parts.
How the Process Works
Plan the bending sequence and calculate springback compensation, which varies with sheet thickness, material and angle
Select the V-die opening according to sheet thickness; the bend angle and material determine the die profile; enter the angle, positioning and pressure parameters into the program
Trial-bend the first article and measure the angle; correct any deviation through the program, and only proceed to volume production once it passes.
CNC automatically positions and bends each part for batch consistency (accurate, repeatable angles); first / middle / last inspections are carried out to prevent die wear or positioning drift.
Sampling inspection of angles and dimensions, with particular attention to the critical angles confirmed on the first article
Accepted parts proceed to welding / surface finishing
Key Advantages
- Accurate, repeatable angles - CNC controlled, consistent from batch to batch
- Uniform profile - consistent bend profiles and batch-to-batch repeatability for stable volume production
- Fast changeover - simply change the program and tooling; suits high-mix, low-volume production
- Springback compensation - pre-compensated in the program to correct springback error
- Large parts possible - long press brake beds handle the bending of large panels
Materials We Process
Carbon steel and stainless steel sheet
Aluminum and aluminum alloys
Galvanized and pre-coated sheet
Copper and brass sheet
Typical Applications
- Enclosures, cabinets and chassis parts
- Brackets, channels and stiffening profiles
- Frames, supports and structural members
- Ducts, guards and panel components
- Furniture and display metalwork
- Electrical and mechanical sheet assemblies
Capability at a Glance
|
Parameter |
Details |
|
Typical angle accuracy |
Part-dependent; commonly ±0.5° - confirm with our engineers |
|
Typical bend length |
Up to several meters depending on machine capacity |
|
Materials |
Steel, stainless steel, aluminum and copper alloys in sheet form |
|
Tooling |
Wide range of V-dies and punches for varied radii and angles |
|
Complexity |
Multi-bend profiles and box shapes with sequenced programming |
|
Quality control |
First article angle verification and dimensional sampling |
Frequently Asked Questions
Q: 1.What bending accuracy can you achieve?
A: CNC controlled, with accurate repeatable angles and uniform batch profiles; the specific tolerance depends on the machine and sheet thickness.
Q: 2.How do you handle springback?
A: Springback is a property of the metal and is solved by process compensation: pre-compensated die angles plus program correction.
Q: 3.How thick and how long a sheet can you bend?
A: Thickness depends on press brake tonnage; length depends on the bed size.
Q: 4.Will the material crack when bent?
A: It depends on material, thickness and bend radius. Thick plate, high-strength steel and aluminium are prone to cracking if the bend radius is too small - this is assessed during process design.
Q: 5. Do you need dedicated tooling?
A: Bending mainly uses standard V-dies, so there is normally no expensive dedicated tooling and changeover costs are low.
Q: 6.How do I choose between CNC bending and die bending?
A: For high-volume bending of identical parts, use a stamping die; for high-mix, low-volume and large parts, use CNC bending.
Work With Us
Share your drawings for a free bend feasibility review and quotation. Our engineers will optimize the bend sequence and tooling to protect your tolerances and finish.