The objective of the study is to develop measurement systems and also to analyze roll-separating force in constrained ring-rolling process where the ring is constrained in the grooved driven roll throughout the whole process.
In the analysis, the deforming situation is well assumed to be a plane strain problem.
Utillizing the slip line method, roll-separating force is calculated both for plane strain extrusion and for plane strain drawing. Frictionless surface condition is assumed at the ring-roll interface and the arc subtending the contact length is also assumed to be a chord in the computation.
For the measurement of torque and roll-separating load the strain gage type load cell and torquemeter are developed. They show the good performance characteristics in the application.
The experiments are carried out for annealed aluminum alloy(Al20l4) at the elevated temperature and experimental results are compared with the theoretical calculations. The comparison shows that theoretical predictions through plane strain extrusion problem are in reasonably good agreement with the experimental observation.
