European Journal of Scientific Research (ISSN: 1450 ... - EuroJournals
European Journal of Scientific Research (ISSN: 1450 ... - EuroJournals
European Journal of Scientific Research (ISSN: 1450 ... - EuroJournals
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© <strong>European</strong> <strong>Journal</strong> <strong>of</strong> <strong>Scientific</strong> <strong>Research</strong>, Vol 7, No 5, 2005<br />
cut selected and surface qualities resulting from the pr<strong>of</strong>ilometry and whose principle is described<br />
below :<br />
The samples are fixed on the mobile table XY whose displacement allows the statement <strong>of</strong> the<br />
work <strong>of</strong> palpation <strong>of</strong> the mechanical feeler whose ray <strong>of</strong> point is <strong>of</strong> 10mm. This latter follows a<br />
straight line on the surface <strong>of</strong> the area <strong>of</strong> the panel while following the irregularities <strong>of</strong> machined<br />
surface. The displacements are transmitted to a sensor and the variations detected by the stylus<br />
(depressions and peaks) are transcribed, enlarged on a graph. Table XY represents two<br />
displacements : one, in the direction <strong>of</strong> the statement <strong>of</strong> the pr<strong>of</strong>ile and the other in a direction<br />
perpendicular to the first. The analysis <strong>of</strong> a pr<strong>of</strong>ile raises indeed, by its very principle, a certain<br />
number <strong>of</strong> question : is this pr<strong>of</strong>ile characteristic to the whole <strong>of</strong> surface ?<br />
2.4.2 Material <strong>of</strong> measurement<br />
The installation <strong>of</strong> the slotted measuring section <strong>of</strong> surface quality is as follows :<br />
- A microcomputer<br />
- A table with cross movements XY<br />
- A roughometer perthometer PRK<br />
- Electronics <strong>of</strong> order<br />
- Support <strong>of</strong> table and roughometer<br />
The displacements <strong>of</strong> the feeler whose exploring needle follows a pr<strong>of</strong>ile to be studied, produce<br />
variations <strong>of</strong> tension being able to be simplified and recorded.<br />
The choice <strong>of</strong> the directions <strong>of</strong> measurement is dominating and the results which stem from the<br />
study <strong>of</strong> the pr<strong>of</strong>iles can give only one partial vision <strong>of</strong> the real state <strong>of</strong> the surface.<br />
3. RESULTS<br />
The results obtained, were sufficiently significant so that this type <strong>of</strong> study could be applied all<br />
the panels. Thanks to a s<strong>of</strong>tware <strong>of</strong> statistics treatment <strong>of</strong> data " statitcf ", we sought the existing<br />
correlations between the cutting pressures, surface qualities and the variables <strong>of</strong> action :<br />
parameters <strong>of</strong> cut and density. We present hereafter the statement <strong>of</strong> the various curves whose<br />
comment will be developed a little further.<br />
Figure 3: influence Em on the cutting pressure and the average arithmetic variation.<br />
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