Dissertation > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Extrusion > Extrusion process

Research on Machining Tool-path Interactive Modification and Optimization of Sheet Metal Incremental Forming

Author FangJingChun
Tutor MoJianHua
School Huazhong University of Science and Technology
Course Materials Processing Engineering
Keywords Rapid Prototyping Incremental Forming Processing Track Non-uniform rational B-spline Process planning
Type Master's thesis
Year 2006
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Sheet metal CNC incremental forming technology , the idea of layered manufacturing rapid prototyping A layer-by-layer extrusion and sheet metal forming metal cover flexible processing technology . Its work characteristics : First, the establishment of forming a three-dimensional digital model of the workpiece , and then generated based on the model the machining track , the track to drive molding machine for processing . Sheet CNC incremental forming process , the trajectory of the tool head has a great influence on the sheet forming , shaping law will rupture when some difficult forming local trajectory of the workpiece does not comply with the sheet metal material , subsidence and other processing defects . Modification of the local processing of the workpiece trajectory is usually achieved through the modification of the three-dimensional digital model in CAD ??software . This article studies directly generate processing track man-machine interactive modify , in order to achieve the purpose of the scene fast real-time modify the processing trajectory . This paper presents a method based on human-computer interaction NURBS machining trajectory modification and optimization solutions , using the knowledge of the NURBS reconstructed discrete set of points of NURBS NURBS curve modification fairing NURBS curve , NURBS curve the approximation and track school and theoretically specific detailed derivation and bonding sheet metal CNC the progressive forming characteristics , select the appropriate algorithm to complete the development of the software modules in Visual C 6.0 platform . On the basis of the modification and optimization of the trajectory of human-computer interaction , CNC sheet metal progressive forming the traditional process of refining and improving , proposed and delete the excess trajectory method , to achieve a specified layer processing , improved straight wall the pieces processing the rupture trajectory of human-computer interaction modify, verified through a series of experiments , the superiority of the improved process .

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