Tool Path Generation for Pocket Machining Operations with Island

Abstract

A new method, in which suitable tool paths are generated in order to manufacture pockets in CNC milling machines, was developed in this study. For this purpose, a new algorithm was developed in order to offset pocket profiles with or without the island. In addition, errors that may arise as a result of offsetting were also eliminated. The tool path was generated by using the offset components obtained through this offsetting process. The acquired tool paths were tried after being sent to CNC milling machine. The success of the developed method was proved without any hollow or residue.

Keywords

• Tool path generation,Self-intersection,Offsetting curve

References

1. 1- Jeong, J., Kim, K., “Generation of Tool Paths for Machining Free-Form Pockets with Islands Using Distance Maps”, Internatonal Journal of Advanced Manufacturing Technology, 15, 311–316, 1999.
2. 2- Jeong, J., Kim, K., “Generating Tool Paths for Free-Form Pocket Machining Using z-Buffer-Based Voronoi Diagrams”, Internatonal Journal of Advanced Manufacturing Technology, 15, 182–187, 1999.
3. 3- Held, M., Voronoi Diagrams and Offset Curves of Curvilinear Polygons, Computer-Aided Design, 30(4), 287-300, 1998.
4. 4- Lee, E., Contour Offset Approach to Spiral Tool Path Generation with Constant Scallop Height, Computer-Aided Design, 35, 511-518, 2003.
5. 5- Lai, Y.,Wu, J., Hung, J., Chen, J., A Simple Method for Invalid Loops Removal of Planar Offset Curves, Internatonal Journal of Advanced Manufacturing Technology, 27, 1153–1162, 2006.
6. 6- You, C.,Sheen, B.,Tzu-Kuan Lin, T., Robust Spiral Tool-Path Generation for Arbitrary Pockets, Internatonal Journal of Advanced Manufacturing Technology, 17,181–188, 2001.
7. 7- Choi, B., Park, S., A Pair-wise Offset Algorithm for 2D Point-Sequence Curve, Computer-Aided Design, 31, 735–745, 1999.
8. 8- Sheen, Bor-Tyng., You, Chun-Fong., Tool Path Generation for Arbitrary Pockets with Islands, J. IntellManuf. 17, 275–283, 2006.

9. 9- Zhiwei, L., Jianzhong, F., Yong, H., Wenfeng, G., ”A Robust 2D Point-Sequence Curve Offset Algorithm with Multiple Islands for Contour-Parallel Tool Path”, Computer-Aided Design, 45, 657-670, 2013.
10. 10- Li, M., ChaoZhang, L., Mo, J., Zhao, Z., ”A Unified Method for Invalid 2D Loop Removal in Tool-Path Generation”, Computer-Aided Design, 45, 124-133, 2013.
11. 11- Göktaş, M., Dilipak, H., Güldaş, A., Analytical Aproach for Offsetting of Two Dimensional Complex Profiles, 5th International Advanced Technologies Symposium (IATS’09), Karabuk, 2009.
12. 12- Göktaş, M., Dilipak, H., Güldaş, A., The Development of A New Algorithm for Tool Path and Offsetting of Two Dimension Profiles Machining, J. Fac. Eng. Arch. Gazi Univ, 1, 179-187, 2010.
13. 13- H. Dilipak, A. Güldaş, M. Göktaş, A New Algorithm for Ofsetting Features Containing Arc, e-Journal of New World Sciences Academy, 5(3), 212-219, 2010.
14. 14- Göktaş, M., Güldaş, A., Dilipak, H., Tool Path Generation for Operation of Pocket Machining with Island, Erciyes University Journal Of Institue of Science and Technology 27(2), 155-162, 2011.