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CATEGORIES:Engineering Department Structures Research Seminar
 s
SUMMARY:Achievable Geometries in Flexible Near to Net Shap
 e Ring Rolling - Christopher Cleaver - PhD Student
DTSTART;TZID=Europe/London:20140606T153000
DTEND;TZID=Europe/London:20140606T160000
UID:TALK52906AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/52906
DESCRIPTION:Ring rolling is an industrial bulk metal forming p
 rocess for producing ring-shaped components of typ
 ical diameter 1-3m. Many of the final components s
 uch as turbo-machinery casings\, flanges\, bearing
 s etc. have a shaped cross-section and yet the con
 ventional process either produces ‘plain’ rectangu
 lar cross-section rings\, wasting material\, or re
 quires expensive part-specific tooling to achieve 
 a nearer to net shape ring. I will be presenting r
 esearch I've carried out into ‘flexible’ ring roll
 ing using a moving pair of radial rollers to achie
 ve a shaped ring – akin to CNC machining. Such a p
 rocess has complex mechanics and three key modes o
 f deformation have been identified and analysed by
  an upper bound plasticity method\, FEA and experi
 ments on a model material. There appears to be an 
 inherent limit on the range of geometries achievab
 le because of difficulty controlling flow in axial
  and circumferential directions. Initial experimen
 tal research suggest that both a) toolpath b) addi
 tional tooling/constraints can potentially increas
 e this range of shapes\, ultimately making it a mo
 re viable industrial process.
LOCATION:Cambridge University Engineering Department\, LR3B
CONTACT:Lorna Everett
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