The main purposes of this project are:1. Development of a dynamic
model for the piercing and performation process2. Analyses of the
main parameters3. Establishing demands for process improvements4.
Expansion of the existing parameter limitsThe literature survey
describes the process influence of several parameters. The survey
is focused on evaluating the parameter effects using different
result parameters. Further, the possibilities of parameter
optimisation are described.Simulation of the process is developed
on the basis of existing literature involving the piercing
operation. Process simulation is focused on the sheet deformation.
However, the effect on the tool and press is included. The process
model is based on the upper bound analysis in order to predict the
force progress and hole characteristics etc. Parameter analyses
are divided into two groups, simulation and experimental tests.
The tests complement each other in order to reveal the dominant
parameters, which are decisive for the final product. Crucial
demands are established to enable the desired improvements,
focused on expanding the existing parameter limits. The demands
include a justified need regarding a high-speed press and a tool
designed for punches with minimum length. Further, a systematic
problem solving procedure is established. This procedure includes
simulation as an integrated part, necessary for problem detection
and to predict a favourable solution.
|Number of pages||207|
|Publication status||Published - 1997|