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