Sheet metal fabrication
How is tube bending calculated and what is the unfold length?
Answer
CNC tube bending uses numerically controlled machines to bend tube to programmed angles and planes with high repeatability. It is the right route for multi-bend parts where angle, plane and length must match the 3D model part after part. What is the difference between CNC bending and press bending? CNC bending programs each bend with controlled feed and rotation, so multi-bend tubes are produced in one setup with consistent geometry.
Sources
- Bent Tube Assemblies | CNC Tube Bending ChinaWhat is CNC tube bending? CNC tube bending uses numerically controlled machines to bend tube to programmed angles and planes with high repeatability. It is the right route for multi-bend parts where angle, plane and length must match the 3D model part after part. What is the difference between CNC b...
- Tube Bending Services China | CNC Tube BendingDo you provide complete tubular assemblies? Yes. Tube bending can be combined with cutting, end forming, welding coordination, surface treatment and simple assembly so you receive a finished tubular part or assembly. Can you handle multi-bend designs? Yes. Multi-bend tube programs are validated for ...
- Tube Bending Services China | CNC Tube BendingRuns the bend program for multi-bend parts, so angle, plane of bend, radius and leg length repeat from part to part. Automatic S-bend production line Continuous S-shaped bends for pipe runs and coil connections, where the bend sequence has to stay constant across a long production run. Hydraulic pre...
- Bent Tube Assemblies | CNC Tube Bending ChinaTube & Pipe Fabrication Bent Tube Assemblies and CNC Tube Bending Tube coiling is now a separate capability: see coiled tube . Programmed CNC tube bending for multi-bend parts with repeatable angle, plane and length — plus helical tube coiling, end forming and assembly support. Send Your Drawi...
- Tube Assemblies: Bent & Coiled Tube to Drawing | BalfordThree things govern whether a tube assembly can be built as drawn: the bend radii against the tube diameter and wall, the length of straight between bends, and the end form – a flare, a bead, a ferrule or a brazed joint. Bending is done on CNC mandrel benders so the bend sequence repeats; the ...
- K-Factor in Sheet Metal: What It Is and How To Set ItIs K-factor the same as the Y-factor? No, but they are related. The Y-factor scales the K-factor to account for springback and material behaviour: Y = K × π/2, so the two are used in different versions of the same bend allowance calculation. Why is my flat pattern wrong even though I used t...
What an engineer still needs from you
- material and material condition (grade, temper)
- material thickness, plus the key diameter, height and wall thickness
- tolerances, burr direction and the visual acceptance standard
- annual volume - it decides whether tooling is single-hit, progressive or transfer
- surface finish, and any secondary machining, annealing or plating
Next step. Send the drawing for a manufacturability review, or send the part data for a process and cost route.
Submit a drawing / RFQDFM review
Submit a drawing / RFQDFM review
Related questions
- Laser cutting vs punching vs plasma: which should I choose?
- How do I calculate bend allowance and the K-factor?
- How do I compensate for springback in sheet metal bending?
- What minimum bend radius and hole-to-bend distance should I design to?
- What are the sheet metal gauge and thickness equivalents?
- Welding vs brazing: which is right for a metal housing?
This page is an engineering answer, not a quotation and not a dimensional acceptance. It is generated from Balford's published material and held to the verified company fact sheet.