BALFORD.Metalworking engineering answers

Sheet metal fabrication

How is tube bending calculated and what is the unfold length?

Answer

Do you provide complete tubular assemblies? 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? Multi-bend tube programs are validated for springback, plane-of-bend and length compensation so the finished tube matches the 3D model.

ProcessSheet metal fabrication
Material / topictube bendingtube unfold lengthtube bend calculation
Related pagesTube Unfold

Sources

  1. Tube Bending Services China | CNC Tube Bending
    Do 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 ...
  2. Bent Tube Assemblies | CNC Tube Bending China
    What 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...
  3. Tube Bending Services China | CNC Tube Bending
    Runs 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...
  4. Bent Tube Assemblies | CNC Tube Bending China
    Tube & 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...
  5. Laser Cutting Services China | Tube & Sheet Parts
    Request a Quote Related manufacturing capability: sheet metal cutting or tube bending — all reviewed from the same drawing before quoting. Laser cutting service scope Balford lasers tube, pipe and sheet. Tube and pipe profiles are cut to length with end forms, notches and holes; sheet is cut t...
  6. Tube Assemblies: Bent & Coiled Tube to Drawing | Balford
    A tube assembly is a tube bent or coiled to a defined centreline path, with an end form that has to seal or connect and often a bracket, ferrule or sleeve held in a fixed relationship to the bends. Four things decide whether it can be built as drawn: the bend radii against the tube outside diameter ...

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

Need a DFM feasibility assessment for your project?

Send the engineering drawing (STEP or PDF) with the material grade, thickness and annual volume. Balford engineers then check it against the process window - draw ratio, wall thickness, tolerances, blank and tooling route - and come back with what is feasible and what is not. An answer on this page cannot replace that review.

Upload a drawing for DFM reviewHow the DFM review works

Related questions

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.