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T-Spline Surface Toolpath Generation Using Watershed-Based Feature Recognition

Yazui Liu, Gang Zhao, Pengfei Han
2020 Applied Sciences  
The freeform surface is treated as a single machining region for most traditional toolpath generation algorithms.  ...  Thus, T-spline is introduced to represent a freeform surface for its toolpath generation in the paper.  ...  Optimized Multi-Rectangles Toolpath Generation for MSRs For the task of freeform surface finishing, UV strategy is usually adopted for freeform surface toolpath generation, various algorithms are developed  ... 
doi:10.3390/app10196790 fatcat:umlov6jtvrhxdp7amjig2pr55e

Investigation of a dynamics-oriented engineering approach to ultraprecision machining of freeform surfaces and its implementation perspectives

Ali Khaghani, Kai Cheng
2021 Nanotechnology and Precision Engineering  
In this paper, an innovative dynamics-oriented engineering approach is presented for ultraprecision machining of freeform surfaces using slow tool servo mode.  ...  In ultraprecision machining of freeform surfaces using slow tool servo mode in particular, however, account must be taken of the machining dynamics and dynamic synchronization of the cutting tool and workpiece  ...  ACKNOWLEDGMENTS The authors are grateful for Ph.D. Scholarship funding support from Brunel University London and the UK EPSRC. The authors declare no conflict of interest.  ... 
doi:10.1063/10.0006388 fatcat:5q5p3p63l5av3mf3ze4g74reti

Tool path generation for freeform surface models

Gershon Elber, Elaine Cohen
1993 Proceedings on the second ACM symposium on Solid modeling and applications - SMA '93  
Generating optimal NC code to drive milling machines for models defined by freeform trimmed surfaces is a difficult problem.  ...  In practice, Two main approaches are used to generate toolpaths for surfaces, neither of which is optimal, in general.  ...  There are two main approaches used to generate tool paths for freeform surfaces.  ... 
doi:10.1145/164360.164500 dblp:conf/sma/ElberC93 fatcat:w5cdbarztfe3fkul4djq7xrgsy

3D representation and CNC machining of 2D digital images

Sumit Sood, Ravinder Kumar Duvedi, Sanjeev Bedi, Stephen Mann
2018 Procedia Manufacturing  
Subsequently, the 3D surface data is then used for generating an efficient toolpath data for 3-axis CNC finish machining using a ball end mill tool.  ...  Subsequently, the 3D surface data is then used for generating an efficient toolpath data for 3-axis CNC finish machining using a ball end mill tool.  ...  We also acknowledge the use of the 3D graphical machining simulation software "ToolSim" developed at the University of Waterloo, Canada for testing the machining toolpaths obtained from the developed 2D  ... 
doi:10.1016/j.promfg.2018.07.001 fatcat:duivqws2pvdo7fmgb7iob4an4i

Toolpath Interpolation and Smoothing for Computer Numerical Control Machining of Freeform Surfaces: A Review

Wen-Bin Zhong, Xi-Chun Luo, Wen-Long Chang, Yu-Kui Cai, Fei Ding, Hai-Tao Liu, Ya-Zhou Sun
2019 International Journal of Automation and Computing  
to possess freeform (i.e., non-rotational symmetric) surfaces.  ...  Driven by the ever-increasing need for high-speed high-precision machining of those products, many novel toolpath interpolation and smoothing approaches have been proposed in both academia and industry  ...  for freeform surface machining.  ... 
doi:10.1007/s11633-019-1190-y fatcat:r6qpmigghbh6jmunqvjvtwgsiu

C1Continuous Toolpath Generation Toward 5-axis High Speed Machining

Gershon Elber, Elaine Cohen, Sam Drake
2006 Computer-Aided Design and Applications  
Extending earlier work that employed the Medial Axis Transform to compute these maximally inscribed circles for 2D planar pockets, this work examines general pockets in ℜ 3 represented as NURBS surfaces  ...  We present a scheme to construct C 1 continuous toolpath for 5-axis pocketing of high speed machining.  ...  Fig. 1 . 1 Given the impeller model in (a), consider one freeform surface pocket S to be high speed machined in 5-axis context (b).  ... 
doi:10.1080/16864360.2006.10738433 fatcat:oxcjvojnmzbp3clu76zk5jniu4

Influence of Tool Diameter on Quality of Completed Radio Area [chapter]

Lubos Kroft, Jan Hnatík, Katerina Bicova
2019 DAAAM Proceedings  
Although the radius surface is a great simplification of the general shape surface, it is suitable for the first research in this area due to the continuous change of engagement conditions.  ...  This research is focused on this area since current finishing operations do not include any of the modern methods of tool path generation, eg through adaptive control or tool load control.  ...  It is derived from roughing strategies, where the toolpath for the round surface was generated in a way which ensures that near constant volumes of material are removed.  ... 
doi:10.2507/30th.daaam.proceedings.076 fatcat:o6cwdfjt5jesffuuvfb3zrybni

SELECTION OF OPTIMAL MACHINING STRATEGY IN THE MANUFACTURE OF ELEMENTS BOUNDED BY CURVILINEAR SURFACES

Łukasz Czerech
2013 Acta Mechanica et Automatica  
The paper presents the influence of toolpath tolerance and machining strategy available in CAD/CAM software on the constituting process of technological surface layer for elements limited with curvilinear  ...  Following article is part of research of the impact of selected technological parameters on the freeform surfaces geometric structure manufactured on CNC machines  ...  The process of generating tool paths for freeform surfaces is a subject of discussion for many researchers.  ... 
doi:10.2478/ama-2013-0001 fatcat:anarj5cejvbgvngmcosv76bxge

Characterization of shape and dimensional accuracy of incrementally formed titanium sheet parts with intermediate curvatures between two feature types

Amar Kumar Behera, Bin Lu, Hengan Ou
2015 The International Journal of Advanced Manufacturing Technology  
It is shown that a mixed-MARS response surface model using a weighted average of the ruled and freeform surface models can be used for such a case to improve the mean prediction accuracy within ±0.5 mm  ...  Response surface functions using multivariate adaptive regression splines (MARS) are then generated to model the deviations at individual vertices of the STL model of the part as a function of geometric  ...  Model for ellipse draft ruled surfaces Nine of the 12 ellipse draft ruled surface parts were chosen as training sets for generating the models.  ... 
doi:10.1007/s00170-015-7649-2 fatcat:uzxwtlm3bbbzph4mmm7kr54dni

A Continuous Multi-material Toolpath Planning for Tissue Scaffolds with Hollowed Features

Ibrahim T. Ozbolat, Bahattin Koc
2011 Computer-Aided Design and Applications  
Ruled surface with hollowed features generated in our earlier work is used to develop toolpath planning.  ...  This paper presents a new multi-material based toolpath planning methodology for porous tissue scaffolds with multiple hollowed features.  ...  After the relaxations, MCLs can be used for toolpath modeling.  ... 
doi:10.3722/cadaps.2011.237-247 fatcat:x4jsydc5fvd3vkzu4kizd5ow3e

Conversion of G-code programs for milling into STEP-NC [article]

Shixin Xú
2014 arXiv   pre-print
to generate Part21 CC2 (conformance class) file.  ...  The work presented here proposes an overall method for G-code to STEP-NC conversion.  ...  It is a placeholder for explicit toolpaths assigned to the operations associated with it. 3 to 5-axis milling of freeform surfaces typically requires explicit specification of toolpaths.  ... 
arXiv:1412.5496v1 fatcat:t3kwz5onybdglhqrr4vwx7pm6u

Feature Recognition for Virtual Machining [chapter]

Shixin XÚ, Nabil ANWER, Lihong QIAO
2015 IEEE International Conference on Industrial Engineering and Engineering Management  
Two approaches, feature recognition from G-code and feature recognition from In-Process Model (IPM), are proposed and elucidated.  ...  By comparing with the original CAD model, form errors of the machining features can be found. And then corrections are suggested to process designers.  ...  From G-Code to STEP-NC We devised an interpreter for the toolpath generation [4] .  ... 
doi:10.2991/978-94-6239-102-4_26 fatcat:vjyh75o7s5a3zn635dguae6i7a

Development of self-tuned diamond milling system for fabricating infrared micro-optics arrays with enhanced surface uniformity and machining efficiency

Zhanwen Sun, Suet To, Sujuan Wang, Jianjun du
2019 Optics Express  
toolpath planning algorithm is developed.  ...  Infrared micro-optics arrays (MOAs) featuring large numbers of micro-freeform lenslet are required increasingly in advanced infrared optical systems.  ...  To for the guidance and support on the experiments. Disclosures The authors declare no conflicts of interest. References  ... 
doi:10.1364/oe.382672 pmid:32121917 fatcat:jzuudxa4azfclozacpcxrucgya

Mathematical Approach in Complex Surfaces Toolpaths

Florin Popișter, Daniela Popescu, Ancuţa Păcurar, Răzvan Păcurar
2021 Mathematics  
In this direction, two algorithms were developed to generate ball-end mill finishing toolpaths for freeform surfaces using ordered/unordered point clouds.  ...  This paper represents the focus on developing efficient algorithms that reduce the operations required to be employed in order to obtain complex surfaces milling finishing toolpaths for the three axis  ...  research can be used, as demonstrated in practice, for two different input data of point cloud and also different milling cutting tools geometry.  ... 
doi:10.3390/math9121360 fatcat:422odc2frzah5eju5b2otsnuh4

Influence of Ball-End Milling Strategy on the Accuracy and Roughness of Free Form Surfaces

Zuzana Grešová, Peter Ižol, Marek Vrabeľ, Ľuboš Kaščák, Jozef Brindza, Michal Demko
2022 Applied Sciences  
The CAM system-predicted surfaces were also compared with the actual surfaces. A test sample with a freeform surface was used for the experiments.  ...  Freeform surfaces are present on an increasing number of engineering products. Three- and multi-axis computer numerical control milling machines are commonly used for improved production.  ...  The need for continuous improvement in generated toolpaths, simulations, and analytical tools is emphasized.  ... 
doi:10.3390/app12094421 doaj:fb0a6330d9814b9988da92f30edeaac0 fatcat:a6lw5saarbc6bhqqynu4ylzb3u
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