The work described provides analytical tools that aid the task of reducing
shaking effects caused by the inertia of high speed machines. The
motivation arises from work being carried out in the Department to
design a retrofit package for existing two piece can body-making machines
in collaboration with the manufacturer with support from SERC. In
addition to the SERC supported work design studies are provided for new
A description of the existing body-making machine and the specification of
the new retrofit package are provided. The shaking force created by a
planar mechanism and a method of estimating instantaneous values of
this force are described. Strategies for balancing are surveyed and relevant
literature reviewed. Those balancing strategies suitable for the retrofit
package are selected and are applied. The specification for a family of new
.. machines is also described and again balancing strategies are selected and
applied to meet this new specification.
The following claims are made for contributions to knowledge.
1. Kinetostatic analysis is combined with the Fast Fourier
Transform (FFT) analysis to provide new ways of
representing the cyclic shaking force in terms of pairs
of contrarotating force vectors.
2. New applications are found for numerical optimisation
techniques, in combination with kinematic,
kinetostatic and the FFf analysis.
3. The uses of auxiliary mechanisms to create the partial
balance are explored and one such mechanism is
studied in depth.
In this work the point is made that too much attention has been paid by
.other researchers to balancing techniques (described here collectively as
mass redistribution methods) wherein moving parts are shaped in such a
way that the masses and mass centre locations cause the shaking force to
be minimised. The work described here concentrates on balancing by
rotating balance masses or auxiliary mechanisms thereby minimising the
loads carried by the parts that have to withstand process forces.
Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy of Loughborough University.