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Selection between laser and AWJ cutting using empirical process modeling
Junkar, Mihael ; Kramar, Davorin
Laser and abrasive water-jet (AWJ) cutting are well introduced in different industrial applications, particularly in the processing of products of complexshapes and of difficult-to-machine materials. ...This paper describes process and cost model aid for the selection between these two complementary contour cutting technologies in design of a single mechanical part. The machinability of a certain material is established by the relationships between the behaviour of a workpiece material during and after processing and by the preset process parameters. Complex interactions are interpreted in sense of empirical rules derived from experimental and specific material-process database curve fits. In our study such empirical models were used for discriminating between processing options, for optimum co-selection of materials and processes. Since many processing parameters are involved, selection of an optimum set of parameters offers opportunity for significant cost saving. The paper shows that seemingly complex optimisation problem can be simplified to a single parameter function through local optimisation. Theseresults provide the technologist and the designer with feedback on the likely influence of processing, on the viability and cost of design, as well as indicating trial processing parameters. A practical use of simple process and cost modeling as well as influence of process parameters on costs are presented on a case study when cutting Al-alloy sheet.
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