Corner Forming Machines: The End of Welded Sheet Metal Joints?

Every sheet metal manufacturer knows that achieving a perfect 90° angle traditionally requires multiple operations—bending, welding, and grinding. This outdated process wastes 18–22 minutes per panel, increases material costs by 15%, and may lead to inconsistent joint quality. Our factory has overcome these drawbacks with corner forming technology, which creates a perfect angle in a single cold-forming process.

The corner forming machine replaces welded joints with cold-rolled precision, reducing production time by 65% and eliminating grinding and welding costs. Our CNC corner forming machine processes 0.6–3mm cold-rolled panels in just a few seconds per corner.

How Does Cold Corner Forming Actually Work?  

Unlike traditional multi-step methods, our process uses two critical phases:  

1. Flare Pre-Bending

  - Create 30°-45° flare on panel edges using standard press brakes  

  - Ensures material flow control during forming  

2. Precision Roll Forming

  - CNC-controlled rollers apply 8-12 tons of pressure  

  - Cold-work material into 90° (±0.5°) angles  

  - Automatically trims excess with integrated shear  

No heat. No sparks. No post-processing.

Several Industries that Benefit from Corner Forming Machines

• Electrical Enclosures: Produce IP67-rated cabinet doors without weld porosity risks.  

• Commercial Kitchen Equipment: Create seamless grease trays from 304 stainless steel - critical for FDA compliance.  

• Transportation: Form ship hull panels and trailer roofs with 40% weight reduction vs. welded designs.  

• Architectural Cladding: Achieve mirror-finished corners on 4m aluminum composite panels.  

• HVAC Systems: Assemble galvanized steel ducts 3x faster with airtight rolled joints.  

Technical Advantages Over Traditional Methods  

Choosing Your Corner Forming Solution  

Our CF-Series CNC corner formers offer:  

1. Forming R-corners does not require corner welding; excess edge material is automatically trimmed.

2. When the R-corner remains the same despite varying sheet thickness, there’s no need to replace the upper and lower forming rolls—simply adjust the gap between them.

3. The structure is relatively simple, and mold changes are convenient (a complete set can be replaced in 10 minutes). Rolling and cutting are integrated, eliminating the need for extra operations.

"Will It Work With My Existing Press Brake?"

Absolutely. The pre-flaring step uses standard V-dies. We provide:  

• Free flange angle calculations  

• Custom roller tooling for unique profiles  

• Operator training

Finally

The corner forming machine requires no grinding, welding, finishing, or polishing. It quickly forms corners in just seconds, making corner welding a thing of the past and offering a new process for sheet metal fabrication. Ready to abandon traditional corner welding? Let Inst create a prototype for your first corner.