A Novel Technique for Temporarily Repair and Improvement of Damaged Pin Joint Support Bores

IF 12.2 1区 工程技术 Q1 MECHANICS Applied Mechanics Reviews Pub Date : 2022-10-06 DOI:10.3390/applmech3040069
Ø. Karlsen, H. Lemu, I. Berkani
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Abstract

Damaged support bores due to wear and ovality can be critical for a machine and its operation, in addition to representing a safety problem and risk of pin breakage. It can be a costly operation to perform the required repairs in between planned service periods, especially because of the unplanned down time. A joint with a standard cylindrical pin will often experience wear and ovality in the support bore surfaces, and at some point, repairs will have to be performed. This study investigates and compares five options when a joint with a cylindrical pin has reached a severe level of wear and ovality, outside its planned service stop. The work involved testing the viability of 3D scanning of the damaged bore surface, 3D printing of a metal bushing, and inserting the bushing into the damaged joint. In addition, two pin solutions, i.e., a standard cylindrical pin and an expanding pin type, were installed into the repaired joint, loaded, and the strain on the pin ends close to the supports was measured. For the sake of comparison, the supports had both smooth circular bore and severe wear and ovality. It was concluded that it is possible to produce and install the 3D-printed bushing insert without major problems; the insert had satisfactory capability during test loading, and it most probably represents a good solution when it comes to the reduction in unwanted downtime during unplanned repairs of damaged joints.
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一种临时修复和改进损伤销钉连接支撑孔的新技术
由于磨损和椭圆度造成的支撑孔损坏对机器及其操作来说是至关重要的,除了代表安全问题和销断裂的风险。在计划的服务周期之间执行所需的维修可能是一项成本高昂的操作,特别是因为存在计划外停机时间。带有标准圆柱销的接头在支撑孔表面经常会出现磨损和椭圆形,在某些情况下,必须进行维修。本研究调查并比较了五种选择,当带有圆柱销的接头在其计划服务停止外达到严重磨损和椭圆度水平时。这项工作包括测试受损孔表面3D扫描的可行性,金属衬套的3D打印,以及将衬套插入损坏的接头。另外,将标准圆柱销和膨胀销两种销方案安装在修复节点内,加载后,测量靠近支座的销端应变。为了便于比较,支架既有光滑的圆孔,也有严重的磨损和椭圆度。得出的结论是,可以生产和安装3d打印衬套插件,而不会出现重大问题;在测试加载期间,该插件具有令人满意的性能,并且在对损坏的接头进行计划外维修期间,它很可能是减少不必要停机时间的良好解决方案。
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来源期刊
CiteScore
28.20
自引率
0.70%
发文量
13
审稿时长
>12 weeks
期刊介绍: Applied Mechanics Reviews (AMR) is an international review journal that serves as a premier venue for dissemination of material across all subdisciplines of applied mechanics and engineering science, including fluid and solid mechanics, heat transfer, dynamics and vibration, and applications.AMR provides an archival repository for state-of-the-art and retrospective survey articles and reviews of research areas and curricular developments. The journal invites commentary on research and education policy in different countries. The journal also invites original tutorial and educational material in applied mechanics targeting non-specialist audiences, including undergraduate and K-12 students.
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