Analysis of vortex levitation

Li, Xin; Kawashima, Kenji; Kagawa, Toshiharu

doi:10.1016/j.expthermflusci.2008.03.010

Cited by 73 publications

(41 citation statements)

References 10 publications

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“…This results in a swirling air flow which causes negative pressure due to the developed centrifugal forces. The workpiece can be picked up and held at an equilibrium position [25]. Similar swirl-based handling effect has been replicated by means of electrical actuation [26].…”

Section: Literature Reviewmentioning

confidence: 91%

A novel pneumatic gripper for in-hand manipulation and feeding of lightweight complex parts—a consumer goods case study

Michalos

Dimoulas

Mparis

et al. 2018

Int J Adv Manuf Technol

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This paper discusses the design and implementation of a robotic gripper that uses compressed air to (a) orient the parts in the desired grasping position, (b) guide the parts inside a grasping mechanism and (c) feed the parts to a track conveyor with sufficient accuracy. The novelty of the approach lays in the ability to perform in-hand manipulation of the object by the gripper allowing to pick randomly placed objects that have a complex geometry. Unlike existing 'pick and place' operations which are mainly focused on flat objects that require minimal manipulation (rotation around vertical axis), the gripper can re-orient the parts itself, minimizing the robot's motion. The major components of the gripper are 3D printed, allowing fast customization for different products. The manipulation and gripping mechanisms have been inspired by an application in the consumer goods industry involving the feeding of shaver handles to an assembly machine. The findings indicate that the proposed solution can be an alternative to part-dedicated, high-cost feeding equipment that is currently used.

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Section: Literature Reviewmentioning

confidence: 91%

A novel pneumatic gripper for in-hand manipulation and feeding of lightweight complex parts—a consumer goods case study

Michalos

Dimoulas

Mparis

et al. 2018

Int J Adv Manuf Technol

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“…Ma wenqi [5] had used RNG k-İ model to simulate. In the literature [6], the swirl sucker was only equipped with one nozzle, flow field asymmetry was caused by this structure. In this paper, three-dimensional numerical simulation was used to simulate vortex cup.…”

Section: Introductionmentioning

confidence: 99%

Application and comparison of different turbulence models in the three-dimensional numerical simulation of non-contact swirl sucker

Meng

2011

Proceedings of 2011 International Conference on Fluid Power and Mechatronics

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In this paper, k-İ model, RNG k-İ model and kmodel were used for non-contact swirl sucker to the threedimensional numerical simulation. Block division technology was used for meshing non-contact swirl sucker, the part of vortex cup was meshed by unstructured grids and the part of gas film was meshed by structured girds. The pressure distribution, the lifting force and the flow rate characteristics were conducted by the three different turbulent model. Compared the simulation results and experiment results, it was known that RNG k-İ model could reproduce the real distribution. This model can be used to understand the influence of handling variables such as the standoff distance and air flow rate on the pressure distribution and lifting force acting on the handled object.

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“…Among the different techniques used to design contactless manipulators, aerodynamic levitation uses a flow of gas to apply a lift force which can be induced by Bernoulli levitation [4][5][6] or by an air cushion. Many devices using the last principle have been developed.…”

Section: Introductionmentioning

confidence: 99%

Robust control of a planar manipulator for flexible and contactless handling

Delettre¹,

Laurent²,

Haddab³

et al. 2012

Mechatronics

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International audienceMany industries require non-contact and flexible manipulation systems, such as magnetic or pneumatic devices. In this paper, we describe a one-degree-of-freedom position control of an induced-air-flow surface. This device allows to convey objects on an air cushion using an original aerodynamic traction principle. A model of the system is established and the parameters are identified experimentally. A H1 robust controller is designed and implemented on the device in order to control the object position. Experiments with objects of various dimensions and materials are conducted and showed the robustness capabilities of the controller

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Analysis of vortex levitation

Cited by 73 publications

References 10 publications

A novel pneumatic gripper for in-hand manipulation and feeding of lightweight complex parts—a consumer goods case study

A novel pneumatic gripper for in-hand manipulation and feeding of lightweight complex parts—a consumer goods case study

Application and comparison of different turbulence models in the three-dimensional numerical simulation of non-contact swirl sucker

Robust control of a planar manipulator for flexible and contactless handling

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