BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Achievable Geometries in Flexible Near to Net Shape Ring Rolling -
  Christopher Cleaver - PhD Student
DTSTART:20140606T143000Z
DTEND:20140606T150000Z
UID:TALK52906@talks.cam.ac.uk
CONTACT:Lorna Everett
DESCRIPTION:Ring rolling is an industrial bulk metal forming process for p
 roducing ring-shaped components of typical diameter 1-3m. Many of the fina
 l components such as turbo-machinery casings\, flanges\, bearings etc. hav
 e a shaped cross-section and yet the conventional process either produces 
 ‘plain’ rectangular cross-section rings\, wasting material\, or requir
 es expensive part-specific tooling to achieve a nearer to net shape ring. 
 I will be presenting research I've carried out into ‘flexible’ ring ro
 lling using a moving pair of radial rollers to achieve a shaped ring – a
 kin to CNC machining. Such a process has complex mechanics and three key m
 odes of deformation have been identified and analysed by an upper bound pl
 asticity method\, FEA and experiments on a model material. There appears t
 o be an inherent limit on the range of geometries achievable because of di
 fficulty controlling flow in axial and circumferential directions. Initial
  experimental research suggest that both a) toolpath b) additional tooling
 /constraints can potentially increase this range of shapes\, ultimately ma
 king it a more viable industrial process.
LOCATION:Cambridge University Engineering Department\, LR3B
END:VEVENT
END:VCALENDAR