Percorrer por autor "Carneiro, Jorge"
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- Automated ceramics tableware finishing: a laboratory prototype for concept validationPublication . Alvarez, Mariano José; Brancalião, Laiany; Carneiro, Jorge; Costa, Paulo Gomes da; Coelho, João Paulo; Gonçalves, JoséIn this paper, it is presented an integration between a finishing device and a collaborative robot in order to automate the sanding process of a ceramic industry in Portugal. The finishing device and the collaborative robot are described as well as the communication between the devices. It was used a computer responsible for decision making and control of all the system. The system was able to control the position of the finishing device according to the force done in the sponge by the ceramic. The final system behavior was presented and discussed, which was satisfactory and performed well. The presented experimental setup is not intended for industrial use, but it is suitable for concept prove, in laboratory. The outputs that will emerge here will be applied in a future industrial application, with requisites compatible with the application environment, regarding robustness and repeatability.
- Automated ceramics tableware finishing: non-circular geometries case studyPublication . Alvarez, Mariano José; Brancalião, Laiany Suganuma; Carneiro, Jorge; Costa, Paulo Gomes da; Coelho, João Paulo; Gonçalves, JoséThis paper is devoted to present the most recent results regarding the ongoing work carried out in the scope of the STC 4.0 HP project, which aims to automate the finishing process of ceramic tableware at the GRESTEL S.A. industry, focusing on non-circular shaped plates. A collaborative robot is in charge of handling the tableware and making it go around its entire perimeter through a sponge, to perform the finishing. An array, with the distances from the center to the different points of the plate, is applied as data to trace the path that the robot must follow. The final goal of this prototype is to obtain an even finish while maintaining a constant force along the entire perimeter of the ceramic tableware. After carrying out a seriesof tests, it was possible to conclude that the current approach was able to manipulate 3D-printed tableware made for testing and travel its perimeter to carry out the finishing.
- Data analysis for trajectory generation for a robot manipulator using data from a 2D industrial laserPublication . Gomes, Diogo; Alvarez, Mariano José; Brancalião, Laiany; Carneiro, Jorge; Gonçalves, Gil; Costa, Paulo Gomes da; Gonçalves, José; Pinto, Vítor H.Nowadays, the automation of factory floors is necessary for extensive manufacturing processes to meet the ever-increasing competitiveness of current markets. The technological advances applied to the digital platforms have led many businesses to automate their manufacturing processes, introducing robotic manipulators collaborating with human operators to achieve new productivity, manufacturing quality, and safety levels. However, regardless of the amount of optimization implemented, some quality problems may be introduced in production lines with many products being designed and produced. This project proposes a solution for feature extraction that can be applied to automatic shape- and position-detection using a 2-dimension (2D) industrial laser to extract 3-dimension (3D) data where the movement of the item adds the third dimension through the laser’s beam. The main goal is data acquisition and analysis. This analysis will later lead to the generation of trajectories for a robotic manipulator. The results of this application proved reliable given their small measurement error values of a maximum of 2 mm.
- Laser Engraving for 3D Surfaces: A Robotized Application Case StudyPublication . Alvarez, Mariano José; Brancalião, Laiany Suganuma; Carneiro, Jorge; Costa, Paulo; Coelho, João Paulo; Gonçalves, JoséOne of the industry’s most common applications of lasers is engraving, which is generally performed on flat surfaces. However, there are many situations where the object to be engraved has an unevenly curved geometry. In those cases, the light power density will be different along the surface for a fixed head, leading to a poor engraving result. This work deals with this problem by designing a robotic application capable of detecting variations on the object surface and automatically creating a trajectory to engrave on it correctly. This was made possible through a robotic manipulator, a time-of-flight distance sensor, and a data processing algorithm over the measured data. Obtained results were acquired using a custom-made test rig and validated by delivering consistent engraving results on irregular surface shapes.
- Prototyping and control of an automatic ceramic tableware finishing devicePublication . Alvarez, Mariano Jose; Brancalião, Laiany Suganuma; Gomes, Diogo; Pinto, Vítor H.; Carneiro, Jorge; Santos, José M.R.C.A.; Coelho, João Paulo; Gonçalves, JoséThis paper presents a first prototype of an automated system that will be applied in stoneware tableware ceramics finishing, being developed in the scope of STC 4.0 HP project. The main objective of this prototype is to test different alternatives to obtain a precise finish on ceramic pieces produced by GRESTEL - PRODUTOS CERÂMICOS S.A, improving the production of irregular pieces that until now are finished using manual labor. This is why the implementation of a closed-loop control of the rotation speed of a finishing sponge and its applied force control is proposed.