Automatic Grinding and Polishing Using Spherical Robot

Dieste, José Antonio; Fernández, Jesús J.; Roba, D.; Gonzalvo, B.; Lucas, Peter

doi:10.1016/j.proeng.2013.08.221

Cited by 41 publications

(25 citation statements)

References 4 publications

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“…During this research, 65% of the tests were made on AL5083 material. This amount of trials also increased by tests performed during previous phases, 46,48 provides the authors a significant amount of results, so Al5083 is used as reference when defining the 'MAT' coefficient. Regarding 'ABR' coefficient, F80 has been broadly used in previous tests because tool footprint obtained is deeper and easier to be measured than in less rough abrasives.…”

Section: Tool Footprint Depth Model Generalisation For Other Abrasivementioning

confidence: 99%

Conformal polishing approach: Tool footprint analysis

Dieste

Fernández-Cuello

Javierre

et al. 2016

Advances in Mechanical Engineering

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Polishing process is one of the most critical manufacturing processes during a metal part production because it determines the final quality of the product. Free-form surface polishing is a handmade process with lots of rejected parts, scrap generation and time and energy consumption. Two different research lines are being developed: prediction models of the final surface quality parameters and an analysis of the amount of material removed depending on the polishing parameters to predict the tool footprint during the polishing task. This research lays the foundations for a future automatic conformal polishing system. It is based on rotational and translational tool with dry abrasive in the front mounted at the end of a robot. A tool to part concept is used, useful for large or heavy workpieces. Results are applied on different curved parts typically used in tooling industry, aeronautics or automotive. A mathematical model has been developed to predict the amount of material removed in function of polishing parameters. Model has been fitted for different abrasives and raw materials. Results have shown deviations under 20% that implies a reliable and controllable process. Smaller amount of material can be removed in controlled areas of a three-dimensional workpiece.

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Section: Tool Footprint Depth Model Generalisation For Other Abrasivementioning

confidence: 99%

Conformal polishing approach: Tool footprint analysis

Dieste

Fernández-Cuello

Javierre

et al. 2016

Advances in Mechanical Engineering

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“…Setting up polishing operations is supported by several probes: one to align and centre the workpiece and another to setup tool length and diameter. Tools shown in Figure 4 and finishing methodology have been developed in previous research [6,7]. The polishing tool has a multilayer design.…”

Section: Polishing Process and Robotic Componentsmentioning

confidence: 99%

“…The tool footprint approximates to a "W" shape profile on the polished surface. It is mainly influenced by the combined movement and the increase of circumference speed with the radius of the tool [6]. The appropriate combination of the tool footprint with the number of tool passes and overlap between passes allow us to overcome the problems of nonuniform surface quality and uniformity.…”

Section: Polishing Process and Robotic Componentsmentioning

confidence: 99%

“…If this validation results negative finishing process will be remade, but only in the defective areas, avoiding the rejection of the part or even the full finishing process execution. Finishing process development is inherited from previous research [6,7]. The previous studies demonstrated the shape of the footprint of a tool that combined a rotational and translational movement to polish flat or big curved freeform surfaces.…”

Section: Introductionmentioning

confidence: 99%

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Environmentally Conscious Polishing System Based on Robotics and Artificial Vision

Dieste¹,

Fernández

Javierre

et al. 2014

Advances in Mechanical Engineering

Self Cite

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Polishing process is one of the manufacturing issues that are essential in the production flow, but it generates the major amount of defects on parts. Finishing tasks in which polishing is included are performed in the final steps of the manufacturing sequence. Any defect in these steps implies rejection of the part, generating a big amount of scrap and generating a huge amount of energy consumption, emission, and time to manufacture and replace the rejected part. Traditionally polishing process has not evolved during the last 30 years, while other manufacturing processes have been automated and technologically improved. Finishing processes (grinding and polishing), are still manually performed, especially in freeform surface parts, but to be sustainable some development and automation have to be introduced. This research proposes a novel polishing system based on robotics and artificial vision. The application of this novel system has allowed reducing the failed parts due to finishing process down to zero percent from 28% of rejected parts with manual polishing process. The reduction in process time consumption, and amount of scrapped parts, has reduced the energy consumption up to 30% in finishing process and 20% in whole manufacturing process for an injection moulded aluminium part for automotive industry with high production volumes.

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“…But most of the executive mechanisms are made of serial manipulators, such as orthogonal XYZ desktop or open architectural industrial robots [4][5][6]. Both the dynamic performance and the precision of the serial manipulators are quite poor due to its open-chain architecture.…”

Section: Introductionmentioning

confidence: 99%

Design and constant force control of a parallel polishing machine

Lin

et al. 2014

2014 4th IEEE International Conference on Information Science and Technology

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In order to improve the low efficiency, poor product consistency and cruel working environment of current manual polishing method, a parallel polishing machine is presented. First, based on the freeform surface polishing requirement, a scheme of the automatic polishing machine is proposed, which includes a five-DOF parallel manipulator, a single DOF rotary table and a linear motion platform with a force feedback system. Next, a polishing force control model of the linear motion platform is established. Fractional order PI λ D μ control method is introduced to achieve force-displacement hybrid control. Finally, the parallel polishing machine is developed and a constant force polishing experiment is conducted. The experimental results display that parallel polishing machine is capable of improving the roughness of the surface of the manufactured part from level 9 precision to level 11 precision.Index Terms -parallel manipulator; automatic polishing system; constant force polishing control; fractional order PI λ D μ controller

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Automatic Grinding and Polishing Using Spherical Robot

Cited by 41 publications

References 4 publications

Conformal polishing approach: Tool footprint analysis

Conformal polishing approach: Tool footprint analysis

Environmentally Conscious Polishing System Based on Robotics and Artificial Vision

Design and constant force control of a parallel polishing machine

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