Spiral tool-path generation with constant scallop height for sheet metal CNC incremental forming

A spiral tool-path generation method with constant scallop height for the sheet metal CNC incremental forming was proposed based on triangular mesh model. On the basis of the curvatures estimation of triangular mesh model, the calculation method of spiral tool-path interval with constant scallop height was discussed. Moreover, the algorithms for generation of spiral drive path using the polygon boundary of the triangular mesh model undersurface and the method of spiral paths propagation according to the spiral drive path were also presented. The case study shows that the proposed method can automatically generate smooth and continuous spiral tool path with constant scallop height according to the given scallop height and tool radius; in addition, the simulation model is nearly identical to the test model. The developed software system runs steadily and reliably.

[1]  Kunwoo Lee,et al.  Principles of CAD/CAM/CAE Systems , 1999 .

[2]  WJ Liu,et al.  Vertex normal vector estimation methods for manifold triangular mesh , 2008 .

[3]  Aldo Attanasio,et al.  Optimization of tool path in two points incremental forming , 2006 .

[4]  Fabrizio Micari,et al.  Shape and dimensional accuracy in Single Point Incremental Forming: State of the art and future trends , 2007 .

[5]  Aldo Attanasio,et al.  Asymmetric two points incremental forming: Improving surface quality and geometric accuracy by tool path optimization , 2008 .

[6]  Min-Yang Yang,et al.  Mesh-based tool path generation for constant scallop-height machining , 2008 .

[7]  Dong-Soo Kim,et al.  A new curve-based approach to polyhedral machining , 2002, Comput. Aided Des..

[8]  Min-Yang Yang,et al.  A CL surface deformation approach for constant scallop height tool path generation from triangular mesh , 2005 .

[9]  Jong-jin Park,et al.  Fundamental studies on the incremental sheet metal forming technique , 2003 .

[10]  M. Rauch,et al.  A new approach for toolpath programming in Incremental Sheet Forming , 2008 .

[11]  Byoung Kyu Choi,et al.  Guide surface based tool path generation in 3-axis milling: an extension of the guide plane method , 2000, Comput. Aided Des..

[12]  Paul Vanherck,et al.  Experimental study on force measurements for single point incremental forming , 2007 .

[13]  G. Hirt,et al.  Computer-Aided Tool Path Optimization for Single Point Incremental Sheet Forming , 2007 .

[14]  Sang C. Park,et al.  A pair-wise offset algorithm for 2D point-sequence curve , 1999, Comput. Aided Des..

[15]  Gabriel Taubin,et al.  Estimating the tensor of curvature of a surface from a polyhedral approximation , 1995, Proceedings of IEEE International Conference on Computer Vision.

[16]  Giuseppina Ambrogio,et al.  An analytical model for improving precision in single point incremental forming , 2007 .

[17]  Brent Stucker,et al.  A 3D surface offset method for STL‐format models , 2003 .

[18]  Dong-Yol Yang,et al.  Improvement of formability for the incremental sheet metal forming process , 2000 .

[19]  Joost Duflou,et al.  Asymmetric single point incremental forming of sheet metal , 2005 .

[20]  Eungki Lee,et al.  Contour offset approach to spiral toolpath generation with constant scallop height , 2003, Comput. Aided Des..

[21]  Niels Bay,et al.  Creating Helical Tool Paths for Single Point Incremental Forming , 2007 .