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Study on Enhancing the Lifetime of the Pneumatic Cylinder in Automatic Assembly Line by Parametric Accelerated Life Testing
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Author(s): Seongwoo Woo (Ethiopian Technical University, Ethiopia), Dennis L. O'Neal (Baylor University, USA), Yimer Mohammed Hassen (Ethiopian Technical University, Ethiopia)and Gezae Mebrahtu (Ethiopian Technical University, Ethiopia)
Copyright: 2023
Pages: 19
Source title:
Design and Control Advances in Robotics
Source Author(s)/Editor(s): Mohamed Arezk Mellal (M'Hamed Bougara University, Algeria)
DOI: 10.4018/978-1-6684-5381-0.ch011
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Abstract
This investigation shows the implementation of parametric accelerated life testing (ALT) as established. It involves (1) a product BX lifetime that X% of a system population is unsuccessful with ALT plan, (2) fatigue design, (3) ALTs with modifications, and (4) discernment as to whether the design(s) fulfills the objective BX lifetime. As a case study, pneumatic cylinder was investigated. The pneumatic cylinder was unsuccessful in a manufacturing line. To reproduce it, parametric ALT was carried out. At the first ALT, the metal seal made of nickel-iron alloy partially cracked and chipped with metal sound. As an action plan, material of the seal was altered from metal to silicone rubber. At the second ALT, due to seal hardening and wear, the piston seal leaked gas. The failure of the silicone seals in the laboratory tests were alike to those returned from the marketplace. The seal material was changed from silicone rubber to (thermoset) polyurethane. For the third ALT, there were no issues. Finally, the lifetime of the pneumatic cylinder was manifested to have a B1 life of 10 years.
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