Machining Free-Form Surface Cavities Using a Combination of Traditional and Non-Traditional Multi-Axis Machining Methods

AbstractBall-end mill (3-axis) machining is a proven, yet inefficient, material removal process for machining surfaces defined within a cavity. Curvature matched (5-axis) machining (CM2) is a proven efficient material removal process for large free-form surfaces, but has primarily been applied to open surfaces. This paper presents a robust algorithm that blends CM2 machining with traditional three-axis ball-end machining to accurately mill free-form surfaces enclosed by cavity walls. Surfaces once inaccessible to CM2 methods can now be effectively machined, while inaccessible regions are prepared for automatic ball-end mill machining. Results of time saving and the percentage of the surface machined using each method are presented.

[1]  Yuan-Shin Lee,et al.  Surface interrogation and machining strip evaluation for 5-axis CNC die and mold machining , 1997 .

[2]  J. S. Hwang.  Interference-free tool-path generation in the NC machining of parametric compound surfaces , 1992, Comput. Aided Des..

[3]  Daniel C. H. Yang,et al.  Iso-phote Based Tool-path Generation for Machining Free-form Surfaces , 1999 .

[4]  Yuan-Shin Lee,et al.  Locally optimal cutting positions for 5-axis sculptured surface machining , 2003, Comput. Aided Des..

[5]  V. Leitáo,et al.  Computer Graphics: Principles and Practice , 1995 .

[6]  Wolfgang Straßer,et al.  An area-oriented analytical visibility method for displaying parametrically defined tensor-product surfaces , 1985, Comput. Aided Geom. Des..

[7]  Gershon Elber,et al.  A Unified Approach to Accessibility in 5-axis Freeform Milling Environments , 1998, SSM.

[8]  Gershon Elber,et al.  Hidden curve removal for free form surfaces , 1990, SIGGRAPH.

[9]  Byoung Kyu Choi,et al.  Ball-end cutter interference avoidance in NC machining of sculptured surfaces , 1989 .

[10]  Jianxin Pi,et al.  Grind-free tool path generation for five-axis surface machining , 1998 .

[11]  S. K. Ghosh,et al.  Curvature catering-a new approach in manufacture of sculptured surfaces (part 1. theorem) , 1993 .

[12]  C. G. Jensen,et al.  A Benchmark Comparison of Curvature Matched Machining versus Three- and Five-Axis Machining Methods Applied to Industrial Part Surfaces , 2002, DAC 2002.

[13]  Sanjay Joshi,et al.  Determining feasible tool-approach directions for machining Bézier curves and surfaces , 1991, Comput. Aided Des..

[14]  Daniel C. H. Yang,et al.  Interference detection and optimal tool selection in 3-axis NC machining of free-form surfaces , 1999, Comput. Aided Des..

[15]  Jongwon Kim,et al.  Generation of collision-free cutter location data in five-axis milling using the potential energy method , 1997 .

[16]  Koichi Morishige,et al.  Tool path Generation Using C-Space for 5-Axis Control Machining , 1999 .

[17]  Yuan-Shin Lee,et al.  2-Phase approach to global tool interference avoidance in 5-axis machining , 1995, Comput. Aided Des..

[18]  J. W. Park,et al.  Cutter-location data optimization in 5-axis surface machining , 1993, Comput. Aided Des..

[19]  W. Edward Red,et al.  Tool selection for five-axis curvature matched machining , 2002, Comput. Aided Des..

[20]  Gershon Elber,et al.  A unified approach to verification in 5-axis freeform milling environments , 1999, Comput. Aided Des..

[21]  Yifan Chen,et al.  A Benchmark Comparison of CAD 5-Axis Machining Packages , 2004, DAC 2004.

[22]  Gregory C Loney,et al.  NC machining of free form surfaces , 1987 .