In the Aerospatiale industry, composite materials are increasingly used for their exceptional physical properties. However, machining operations are required in order to shape parts in these materials, which fulfil specifications. There are two operations that predominate: routing and drilling. With these processes, comes the problem of dust emission, cut quality and productivity which are very important in industry. Thus in this dissertation, we look into the limitation of these particles while keeping a consistent finish when routing or drilling organic matrix composites.
So we have studied the effect of different cutting parameters (tool geometry, feed, cutting speed, depth of cut) on particles emissions and part quality while routing and drilling a carbon-epoxy laminate. The emissions are composed of particles less than 2,5 μm (PM2,5) and particularly of particles between 10 and 400 nm. For dust emissions, we looked especially at the concentration in number, in specific area and in mass.
For this study we chose a carbon-epoxy laminate used in aeronautics (CYCOM 5320-1), with three different thickness (2, 4 and 6 mm) and with an orientation of 0/90 degrees for fibers. For each operation, two types of tools are tested. For routing, a mill Onsrud 68-010 and a Guhring 3870. For drilling, a drill Onsrud 85-819 and a Guhring 160 series.
It has been found that all of these parameters have a direct impact on the measured values. In order to machine parts with the best compromise between parts quality, productivity and dust emission, the best tools and parameters are recommended for each machining operations: routing and drilling
| Date | 22 Feb 2016 |
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| Original language | French |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | Victor Songmene (Supervisor) |
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Boutitie, V. (Author),
Songmene (Supervisor),
22 Feb 2016Student thesis: Master's thesis › Master in Engineering: Engineering