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CNC Bending of Perforated Mounting Rail into Frames
High-precision CNC bending forms perforated steel mounting rail into square frames and brackets, keeping hole positions true after every bend.
Key Specifications
- Materials
- Perforated steel mounting rail / flat bar
Key Features
- Bends pre-punched rail without distorting holes
- Square frames formed with parallel legs
- CNC cycle repeats corner radii exactly
- Support tooling prevents section buckling
Can You Bend Perforated Rail Without Ruining the Hole Pattern?
Short answer: Yes, with formed support tooling. This video shows punched steel mounting rail being bent into square frames on a CNC machine - the hole pitch survives every corner.
What the Video Demonstrates
| Step | Operation | Result |
|---|---|---|
| 1 | Rail located on die | Holes indexed to bend line |
| 2 | Corner formed under support | No buckling at the web |
| 3 | Remaining corners cycled | Square, parallel legs |
| 4 | Frame checked | Interchangeable parts |
Key Applications
- Handle frames for panels and doors
- Mounting brackets from struts and channel
- Electrical enclosure frames in punched rail
Why Perforated Stock Is Harder to Bend
| Issue | Cause | Fix shown |
|---|---|---|
| Hole distortion | Open web collapses | Formed support die |
| Twisting | Asymmetric section | Guided clamp |
| Radius drift | Springback variance | CNC over-bend compensation |
FAQ
Should the rail be punched before or after bending? Pre-punching suits short runs when tooling supports the web; post-punching suits high volume. We advise per part.
Can the machine bend solid bar as well? Yes - the same platform covers round rod, flat bar and profiles up to 16 mm sections.
Interested in this machine?