Optimization of outer diameter of Bernoulli gripper

Shi, Kaige; Li, Xin

doi:10.1016/j.expthermflusci.2016.03.024

Cited by 30 publications

(23 citation statements)

References 16 publications

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“…To avoid the issues caused by the contact between the gripper and the object, methods such as magnetic, 5 optical, 6 aerodynamic, 7,8 or acoustophoretic 9 noncontact handling are employed. Among these methods, acoustic levitation has the main advantage of being able to manipulate a wide range of materials, including solids, 10,11 liquids, [12][13][14] and even living creatures.…”

mentioning

confidence: 99%

Contactless pick-and-place of millimetric objects using inverted near-field acoustic levitation

Andrade

Ramos

Adamowski

et al. 2020

Applied Physics Letters

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We model and realize an ultrasonic contactless pick-and-place device capable of picking, self-centering, self-orienting, translating, and releasing flat millimetric objects. The device is an ultrasonic Langevin transducer operating at 21 kHz that radiates into air through a tapered tip. Objects are trapped few micrometers below the tip due to the near-field acoustic levitation phenomenon. We first investigate the conditions to achieve an attractive force on the object depending on its size and the device operating frequency. Second, we use a 3D acoustic model that describes the converging forces and torque that provide the self-centering and self-orienting capabilities. Third, a more advanced Computational Fluid Dynamics model based on the Navier-Stokes equations explains the small gap between the tip and the trapped object. The contactless manipulation capabilities of the device are demonstrated by picking, transporting, and releasing a Surface Mount Device in air. The presented manipulation concept can be an interesting alternative for manipulating delicate objects such as microelectromechanical devices, silicon dies, or micro-optical devices.

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mentioning

confidence: 99%

Contactless pick-and-place of millimetric objects using inverted near-field acoustic levitation

Andrade

Ramos

Adamowski

et al. 2020

Applied Physics Letters

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“…This adsorption force is caused by vacuum pressure, which also exits the vacuum penetration effect. In addition, some other researchers developed some noncontact chucks based on the Bernoulli effect [12][13][14][15] and vortex blades. 16,17 Both types of chucks are noncontact and used in occasions where the workpiece cannot be directly contacted.…”

Section: Recent Label Separation Researchmentioning

confidence: 99%

Airflow‐induced high‐speed separation method for stacked paper labels and its mechanism

Huang

et al. 2020

Packag Technol Sci

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An airflow‐induced separation method for stacked paper labels is proposed with a stream of compressed air used to jet vertically onto the side of the stacked labels and force constraints applied to the two ends of the labels. Its mechanism is revealed that the viscous force caused by airflow is the main driving force for the initial separation of labels and the vertical force is the main factor for the formation of successive separation channels. Theoretical and experimental analyses are implemented to ensure the effects of airflow velocity, label characteristics, label stress, and other factors on label separation and show that a stable separation gap can be generated with separation efficiency of more than 3600 sheets per minute and reliability of 99.99%. A complete airflow‐induced label separation device is designed, which can be integrated into the existing packaging machine, and the physical feasibility of the stack label separation method is verified by experiments.

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“…Taking into consideration flow continuity condition G ¼ constant in any section, the following equations will be right p r1 dp r1 (11) their solutions will be the equations for defining mass air flow…”

Section: Defining Lifting Force Of Gripping Devicementioning

confidence: 99%

“…9 Also, a similar principle of work is proposed in the article. 10,11 In an earlier work, 12 the values of the optimal outer diameter for a range of supply mass flow rates were calculated. In another work, 13 a flexible, multifunctional gripper for handling variable size, shape and weight of unpacked food products is discussed.…”

Section: Introductionmentioning

confidence: 99%

Justification of design and parameters of Bernoulli–vacuum gripping device

Savkiv

Mykhailyshyn

Duchoň

et al. 2017

International Journal of Advanced Robotic Systems

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The dynamics of the air flow between interacting surfaces of Bernoulli-vacuum gripping device and object of manipulation is analysed. The methods of increasing lifting capacity in given devices are presented. The equation for defining pressure distribution in between interacting surfaces of gripping device and object of manipulation and equations for calculation of power characteristics is calculated. The results of theoretical researches of Bernoulli-vacuum gripping devices with different forms of active surfaces are introduced.

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Optimization of outer diameter of Bernoulli gripper

Cited by 30 publications

References 16 publications

Contactless pick-and-place of millimetric objects using inverted near-field acoustic levitation

Contactless pick-and-place of millimetric objects using inverted near-field acoustic levitation

Airflow‐induced high‐speed separation method for stacked paper labels and its mechanism

Justification of design and parameters of Bernoulli–vacuum gripping device

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