%0 Conference Paper %1 Simas_et_al07:COBEM07_scallop %A Simas, Henrique %A Dias, Altamir %A Guenther, Raul %B Proceedings 19th International Congress of Mechanical Engineering - COBEM %C Brasilia - DF %D 2007 %K imported %T A SCALLOP-HEIGHT BASED ALGORITHM TO COMPUTE PARALLEL PATHS ON PARAMETRIC SURFACES %X The turbine blades are submitted a frequent erosion process called cavitation due to the action of water flow, its vortex, and the slow pressure created by the phenomena on blades surface. The cavitation are identified by a set of craters in the blades surface, generally mechanical damages that needs to be recovered, nowadays by a manual welding process. The ROBOTURB project is developing an automatized system, where a robot is used for recovery these damages, also by welding process. The recovery process requires material deposition by layers, and each layer are applied on the crater surface in accordance with welding parameters. The robot s end effector path must be gotten equally spaced, or mathematically parallel itself, in way to optimize the process related to the time and quality deposition. Considering that the eroded area and surface mathematically doesn't have a predefined shape, ones can use a freeform surface representation to represent it. From that local properties can be evaluated as well as to achieve the set of parallel paths on it. These paths are references to compute the robot inverse kinematics that will carry through the operation. This article presents a solution for the parallel path evaluation based in scallop height algorithms.. Also, through properties of the Bezier surfaces a solution for delimiting the erosion area is presented. All those parameter and algorithms variables are in accordance with parameters used on welding process. %Z Submitted

@inproceedings{Simas_et_al07:COBEM07_scallop, abstract = {The turbine blades are submitted a frequent erosion process called cavitation due to the action of water flow, its vortex, and the slow pressure created by the phenomena on blades surface. The cavitation are identified by a set of craters in the blades surface, generally mechanical damages that needs to be recovered, nowadays by a manual welding process. The ROBOTURB project is developing an automatized system, where a robot is used for recovery these damages, also by welding process. The recovery process requires material deposition by layers, and each layer are applied on the crater surface in accordance with welding parameters. The robot s end effector path must be gotten equally spaced, or mathematically parallel itself, in way to optimize the process related to the time and quality deposition. Considering that the eroded area and surface mathematically doesn't have a predefined shape, ones can use a freeform surface representation to represent it. From that local properties can be evaluated as well as to achieve the set of parallel paths on it. These paths are references to compute the robot inverse kinematics that will carry through the operation. This article presents a solution for the parallel path evaluation based in scallop height algorithms.. Also, through properties of the Bezier surfaces a solution for delimiting the erosion area is presented. All those parameter and algorithms variables are in accordance with parameters used on welding process.}, added-at = {2008-03-02T02:12:02.000+0100}, address = {Brasilia - DF}, annote = {Submitted}, author = {Simas, Henrique and Dias, Altamir and Guenther, Raul}, biburl = {https://www.bibsonomy.org/bibtex/270ab37a4d41717ffbe49843421312225/dmartins}, booktitle = {Proceedings 19th International Congress of Mechanical Engineering - COBEM}, description = {robotica-bib}, interhash = {93ad3ce90639855c25e43ebbb1497a61}, intrahash = {70ab37a4d41717ffbe49843421312225}, keywords = {imported}, timestamp = {2008-03-02T02:14:22.000+0100}, title = {A SCALLOP-HEIGHT BASED ALGORITHM TO COMPUTE PARALLEL PATHS ON PARAMETRIC SURFACES}, year = 2007 }