2006-07-06

Incremental sheet forming


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Shape formed from aluminium sheet

Incremental sheet forming machine (research rig)

Incremental sheet forming machine (research rig)

Incremental Sheet Forming

Incremental Sheet Forming (ISF) is a flexible process for forming sheet metal under the action of a mobile indenter such that almost any 3D shell shape can be made without specialised tooling. The process is recognised as a sustainable technology because it has the potential to enable a move towards small-scale localised production of customised sheet metal parts, as well as re-engineering of damaged or obsolete products.

Aims

To understand the process mechanics and expand the process capabilities in order to develop a flexible manufacturing system that is capable of achieving the specifications of typical sheet metal applications. To achieve this goal, the project seeks to:

  • develop a technique for prediction and correction of elastic springback
  • measure and predict forces on the indenter
  • expand the process capabilities by experimenting with a range of set-ups

The technology

An ISF machine was commissioned at the IfM in October 2004. The machine was designed and built in-house and is the first dedicated rig built outside Japan. Unique features include a built-in force measurement system, rigid and accurate support of the indenter in three directions and space under the workpiece for the future addition of a second indenter. The path of the indenter is numerically controlled via a PCI board motion controller.

Applications

Potential applications include:

  • manufacture or repair of automotive parts
  • custom-made medical braces such as ankle supports
  • bespoke architectural features
  • casing for electrical goods

Current research

Research projects currently underway include:

  • development of a model for tool force prediction with experimental verification
  • development of a model for the prediction of elastic springback.

Researchers

Funding

EPSRC

Duration

2004 - 2007


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