Journal
JOURNAL OF FOOD ENGINEERING
Volume 98, Issue 3, Pages 332-338Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jfoodeng.2009.11.020
Keywords
Gripper; Robot; Food; Fruit; Flexible; MR fluid; Magneto-rheological fluid; Delicate
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Funding
- Commission of the European Communities [FP6-CT-2006-015710]
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Natural food products are often variable in shape and easily bruised, making them difficult to handle for a robot. In this paper, a novel robot gripper that utilizes the effects of a magnetorheological (MR) fluid is described and evaluated. In the gripping process pouches filled with MR fluid are molded around the product's contours. Through the activation of an electromagnet in the gripper arm, a large increase in the MR fluids yield stress confines the product in the mould produced by the gripper surfaces, allowing it to be lifted. Mounted on a six axis KUKA robot products such as apples, carrots, strawberries, broccolis and grapes have been handled without bruising or denting and without the tool changes that would typically be needed. The paper presents data regarding the forces exerted on products during gripping as well as data on maximum payloads and graspable product shapes. (C) 2010 Elsevier Ltd. All rights reserved.
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