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Automatic assembly design project 1968/9: report of technical survey committee
Full text linkAn Industrial survey has been carried out to
determine the desired features of an automatic
as machine.
A questionnaire was circulated to industry and
the results of the 38% response obtained were
analysed and plotted. From these, conclusions
were drawn as to the industrial requirements of
an assembly machine
An appraisal of a systems procedure with particular reference to a tyre manufacturing organisation: 2nd year ergonomics course
No full textThe objective of this project was to show how the procedures
and techniques of system design may be used to evolve a soft
system.
In this project a systems design procedure was applied to a
tyre ordering and despatch method for a large manufacturing
organisation
An apparatus for the measurement of tensile creep and contraction ratios in small non-rigid specimens
Full text linkAn apparatus is described for precise measurement of
creep properties in specimens with gauge lengths down to 1.2
cm. An extensometer has been developed which is supported
independently of the specimen and exerts a load on the specimen
of less than 5 grams. It can thus be used with small non-rigid
specimens. The extensometer will detect strains down to
2 x 10-6. The stability is excellent. An adaptation of the
system which allows simultaneous measurement of tensile strain
and lateral strain during creep is also described. The apparatus
was designed for the measurement of anisotropy of creep
properties in oriented thermoplastics and reference to such
measurements is given. It is however entirely suitable for
general application to small specimens
Progress report to sponsors in the surfacing division, The Welding Institute
No full textSince the last report to sponsors circulated in mid-1967, considerable
concern has been felt over the wide scatter of results. The scatter in results
between specimens produced in a single batch was generally comparatively
small, in the order of 15%, but occasional results occurred which ehow6d much
greater differences from the average. Identical experiments carried out in
different batches exhibited rather more scatter than with in single batches.
Similar scatter was noted in the results of other workers" 2 . Additionally,
many blasting variables which had previously been considered important by
metal sprayers appeared to have very little effect on the bond strength of
flame sprayed aluminium coatings on mild steel. Consideration of scatter in
results suggested four possible reasons for this scatter
Some notes on a light scattering technique for measuring the mean droplet size of sprays
Full text linkThere is often great difficulty in measuring mean droplet size
and drop size distribution in sprays because of sampling problems. This
is particularly true if the spray is produced in the practical environment,
for example in a high pressure combustion chamber, and the spray density
is high. In recent years there has been a greater need to evaluate the
characteristics of atomisers under such conditions and hence greater
interest shown in optical methods which present the most convenient
means for examining spray characteristics.
It is not intended in this brief note to discuss in detail the
principles involved with diffractive scattering methods of measuring mean
droplet size, - this has been done very effectively elsewhere - but merely
to outline some of the practicalities of producing a reliable instrument
based on one method which has considerable promise. One of the early
papers describing and evaluating this method was published by Dobbins,
Crocco and Glassman in 1963, but the theoretical background on which the
method is based was available much earlier … [cont.]