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Traversing the Machining Graph [chapter]

Danny Z. Chen, Rudolf Fleischer, Jian Li, Haitao Wang, Hong Zhu
2006 Lecture Notes in Computer Science  
The objective is to minimize the number of tool retractions in the zigzag machining path for a given pocket (i.e., a planar domain).  ...  Zigzag pocket machining (or 2D-milling) plays an important role in the manufacturing industry.  ...  Introduction 2D-milling, or zigzag pocket machining (ZPM), is an important problem in the manufacturing industry [17, 28, 31, 33] .  ... 
doi:10.1007/11841036_22 fatcat:ae7wni5qyzgynonctzlvcutgfm

Cutter path generation for 2.5D milling by combining multiple different cutter path patterns

Zhiyang Yao, Satyandra K. Gupta
2004 International Journal of Production Research  
Based on observations, a new cutter path generation algorithm is described in this paper.  ...  However, for certain types of complex pockets, no single type of pattern produces efficient cutter paths throughout the pocket.  ...  Opinions expressed in this paper are those of authors and do not necessarily reflect opinion of the sponsors.  ... 
doi:10.1080/00207540310001652879 fatcat:vxa3x5wnjff5panho4no4cj4zy

Geometric Optimization Algorithms in Manufacturing

Kai Tang
2005 Computer-Aided Design and Applications  
Three illustrative problems are then presented in details: the shortest contour touring problem in laminated object manufacturing, the minimum tool retractions problem in zigzag machining, and the minimum  ...  In this paper we review the recent progress in the design of efficient algorithms for several geometric optimization problems in manufacturing processes.  ...  Fig. 4 A 4 zigzag tool path with five tool retractions. Fig. 5 . 5 Zigzag machining graph. Left: Zigzag lines intersect pocket contour; Right: corresponding machining graph Definition 1.  ... 
doi:10.1080/16864360.2005.10738338 fatcat:c2trvj33dracdb3qdxxwgu5kka

Spiral cutting operation strategy for machining of sculptured surfaces by conformal map approach

Yu-Wen Sun, Dong-Ming Guo, Zhen-Yuan Jia
2006 Journal of Materials Processing Technology  
Although compound surfaces and polyhedral models are widely used in manufacturing industry, the tool path planning strategies are very limited for such surfaces in five-axis machining and high speed machining  ...  In this paper, a novel conformal map based and planar spiral guided spiral tool path generation method is described for NC machining of complex surfaces.  ...  In general, using conventional Zigzag pattern tool paths needs many cutter retractions and causes additional tool movements which do not contribute to the actual machining.  ... 
doi:10.1016/j.jmatprotec.2006.05.004 fatcat:hgii6jejpzfinf2pxtb5miz23a

Manufacturing processes [chapter]

Ravi Janardan, Tony Woo
2004 Handbook of Discrete and Computational Geometry, Second Edition  
In [AHS00] , a zigzag pocket machining algorithm is given and it is proved that the number of retractions is at most 5r + 6h for a pocket with h ≥ 0 holes, where r is the minimum number of retractions  ...  Zigzag pocket machining: Similar to direction-parallel machining, except that the tool moves from left to right, then right to left, and so on.  ...  Prove that the zigzag pocket machining problem that calls for the minimum number of retractions and requires that no pocket point is machined more than once ([AHS00]) is NP-hard, or provide a polynomial-time  ... 
doi:10.1201/9781420035315.ch55 fatcat:77gyrwh5nfabpirmyvamjtjav4

Multi objective optimization of rough pocket milling strategies during machining of lead-free brass alloys using Desirability function and Genetic algorithms-based analysis

Nima Zoghipour, Akif Furkan Yaratan, Yusuf Kaynak
2021 Procedia CIRP  
This fact impedes an efficient comparison and choice of appropriate product family combinations for the production system.  ...  In this paper, various cutting responses such as machining time (tm), cutting forces (Fr), metal removal rate (MRR), and dimensional accuracy (DA) during the rough pocket milling of the lead-free brass  ...  Acknowledgements The authors thank TUBITAK (The Scientific and Technological Research Council of Turkey) for partially supporting this work under project number 118C069.  ... 
doi:10.1016/j.procir.2021.03.022 fatcat:b7m5oandt5hgnfamhllvixed2i

Path planning for semi-automated simulated robotic neurosurgery

Danying Hu, Yuanzheng Gong, Blake Hannaford, Eric J. Seibel
2015 2015 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)  
We present robust path planning methods for robotic ablation of tumor residues in various shapes, which are represented in point-clouds instead of analytical geometry.  ...  Along with the path plans, corresponding metrics are also delivered to the surgeon for selecting the optimal candidate in the automated robotic ablation.  ...  The authors appreciate Angelique Berens MD for providing surgical suction equipments.  ... 
doi:10.1109/iros.2015.7353737 pmid:26705501 pmcid:PMC4687488 fatcat:gsjnzytqgbgj5cecsggxx5vqci

C1Continuous Toolpath Generation Toward 5-axis High Speed Machining

Gershon Elber, Elaine Cohen, Sam Drake
2006 Computer-Aided Design and Applications  
We present a scheme to construct C 1 continuous toolpath for 5-axis pocketing of high speed machining.  ...  , and in 5-axis machining setup.  ...  Examples include consideration of successive application of tools with decreasing radii [20] , so as to reduce the overall machining time, or alternatively, minimizing the number of retractions in zigzag  ... 
doi:10.1080/16864360.2006.10738433 fatcat:oxcjvojnmzbp3clu76zk5jniu4

A new algorithm for build time estimation for fused filament fabrication technologies

Zicheng Zhu, Vimal Dhokia, Stephen T Newman
2016 Proceedings of the Institution of mechanical engineers. Part B, journal of engineering manufacture  
The key factors that drive the algorithm can be directly obtained from part dimensions/drawings, providing an efficient and accurate way for FFF time estimation.  ...  CNC machining) processes. In the iAtractive process production, operation sequencing of additive and subtractive operations is essential.  ...  Different heights of the part resulting from the change of part orientations can result in different build times. • Reducing the length of repositioning tool path (Srep) could lead to decreases in machine  ... 
doi:10.1177/0954405416640661 fatcat:tts7tbkctbcpxpx3hburzutp7m

Pocket milling with tool engagement detection

Thomas R. Kramer
1992 Journal of manufacturing systems  
This paper presents an algorithm for generating a tool path for cutting a pocket with islands, which includes detecting when the tool is certain to be making a minimal engagement cut.  ...  Feed rates and spindle speeds are reset by the algorithm when machining conditions change from a minimal engagement cut to any other type of cut or vice versa.  ...  If part of the boundary of a pocket is accessible from the side for some reason (such as an adjoining pocket already having been machined), then the most efficient method of machining is probably to mill  ... 
doi:10.1016/0278-6125(92)90042-e fatcat:dyflefhgfrhjrkh66in6iiq5dy

Sustainable selection of optimum toolpath orientation in milling AISI 1018 steel alloy

Vincent A. Balogun, Isuamfon F. Edem
2019 Procedia Manufacturing  
However, power evaluations of the machine tool axes when carrying different weights and in different toolpath trajectories have not been fully implemented for energy management in machining processes.  ...  Therefore, sustainable slot milling operations could be achieved by aligning the toolpaths at an angle oriented in the direction of the lighter axis for minimum feed axes power consumption.  ...  [18] developed a toolpath planning algorithm to determine the optimal inclination angle between 0° and 90° with minimum number of tool retractions, and the number of elements for the zag and zigzag  ... 
doi:10.1016/j.promfg.2019.05.080 fatcat:6m7msqr3mnadnhe7lww4d4zsae

Evolutionary algorithms for generation and optimization of tool paths

Aydin Nassehi, Wesley Essink, Jack Barclay
2015 CIRP annals  
Consequently, algorithms have been developed for generating such tool paths with the aim of optimizing various objectives.  ...  In this paper, evolutionary algorithms for generation of continuous motion paths have been investigated to propose a novel method for creation and adaptable optimisation of paths that allows the objective  ...  path, the tool may be retracted to the safe plane and positioned elsewhere in the feature.  ... 
doi:10.1016/j.cirp.2015.04.125 fatcat:sqnvuvk4cvhhnlr6ehuqgzk5hm

Semi-autonomous simulated brain tumor ablation with RAVENII Surgical Robot using behavior tree

Danying Hu, Yuanzheng Gong, Blake Hannaford, Eric J. Seibel
2015 2015 IEEE International Conference on Robotics and Automation (ICRA)  
task using behavior tree framework, and (3) designing an experimental simulated ablation task for feasibility study and robot performance analysis.  ...  This paper provides three contributions mainly: (1) describing the brain tumor ablation as an ideal candidate for autonomous robotic surgery, (2) modeling and implementing the semi-autonomous surgical  ...  and Di Zhang's assistance in 3D printing.  ... 
doi:10.1109/icra.2015.7139738 pmid:26405563 pmcid:PMC4578323 dblp:conf/icra/HuGHS15 fatcat:bbx4e5w6djeyfd2gtciw666stq

A model-based sustainable productivity concept for the best decision-making in rough milling operations

G. Urbikain Pelayo, D. Olvera-Trejo, M. Luo, K. Tang, L.N. López de Lacalle, A. Elías-Zuñiga
2021 Measurement (London)  
There is a need in manufacturing as in machining of being more productive. However, at the same time, workshops are also urged for lesser energy waste in cutting operations.  ...  In the case of plunge milling technique achieve an SPG < 0.51 while trochoidal milling produces a very low SPG value.  ...  296176, and National Lab in Additive Manufacturing, 3D Digitizing and Computed Tomography (MADiT) LN299129.  ... 
doi:10.1016/j.measurement.2021.110120 fatcat:am2dhiiunrdzxhkypfayvmnl34

Biomolecular modeling and simulation: a field coming of age

Tamar Schlick, Rosana Collepardo-Guevara, Leif Arthur Halvorsen, Segun Jung, Xia Xiao
2011 Quarterly Reviews of Biophysics (print)  
The increases in computational power combined with improvements in algorithms and force fields have led to considerable success, especially in protein folding, specificity of ligand/biomolecule interactions  ...  Although far from a general automated tool, structure prediction is notable for proteins and RNA that preceded the experiment, especially by knowledge-based approaches.  ...  The theory of the atom -the never-ending quest by scientists to reduce the atom to smaller and smaller parts -serves in the play as an allegory to excess and greed, which also led to the economic crisis  ... 
doi:10.1017/s0033583510000284 pmid:21226976 pmcid:PMC3700731 fatcat:ly3npl6jizgijcv7agjgflflzi
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