This thesis is concerned with the design of press tool
run-ofts. Run-off is the area on the punch surrounding the panel
and its shape is of great importance to the control of metal flow
during the draw. The design, although influenced by engineering
considerations, is principally a geometric problem, which
traditionally has been time-consuming. The overall objective is
to reduce the run-oft definition time and hence improve the lead
Current Austin Rover design procedures are described in Chapter 2 and form the basis of the C.A.D. program outlined in
Chapter 3. This specification distils the need for a number of
In general, obtaining the required continuity between the panel
and run-off surface will require some degree of boundary curve
approximation. Chapter 4 details four alternative approximation
techniques which are compared in Chapter 5; and constitute the
main results of the thesis. The salient issues of run-off surface
interpolation are considered in Chapter 6.
A Doctoral Thesis. Submitted in partial fulfillment of the requirements for the award of Doctor of Philosophy of Loughborough University.