Bka. Ngoi et al., ANALYSIS OF NATURAL RESTING ASPECTS OF PARTS IN A VIBRATORY BOWL FEEDER - VALIDATION OF DROP TEST, International journal, advanced manufacturing technology, 13(4), 1997, pp. 300-310
Citations number
4
Categorie Soggetti
Engineering, Manufacturing","Robotics & Automatic Control
This paper seeks to verify that the existing hypotheses, which predict
the natural resting aspects of small engineering parts on soft and ha
rd surfaces, are able to predict the orientation of parts on the track
of a vibratory bowl at different vibrating amplitude levels. Most of
the existing hypotheses developed were verified using the ''drop test'
' method in which parts were repeatedly dropped from a certain height
onto a surface in order to analyse the natural resting behaviour of pa
rts. This paper describes an attempt to conduct accurate experiments i
n the laboratory to examine the probabilities of the feed orientation
of square and rectangular components of different aspect ratios by var
ying the vibration amplitude levels and surface textures of the vibrat
ory bowl. The experimental results were compared with the predictions
of the: hypotheses postulated first by Ngoi, Lye and Chen [1], secondl
y by Boothroyd [2] and thirdly by Ngoi, Lim and Lee [3] The experiment
al results were found to agree well with those predicted by the hypoth
eses. Moreover, it is also observed that the vibrating amplitude of th
e vibratory bowl does not significantly affect the orientation of the
parts.