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首页> 外文期刊>Journal of Mechanical Science and Technology >Integrated process design of Al6061 alloy bolts for fastening offshore platforms
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Integrated process design of Al6061 alloy bolts for fastening offshore platforms

机译：用于固定海上平台的AL6061合金螺栓综合工艺设计

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In this study, we design an integrated manufacturing process for Al6061 alloy bolts to fasten offshore platforms. The proposed scheme includes the theoretical design and numerical study for the heading, trimming, and thread-rolling process. For the theoretical design, the initial rod diameter and the penetration depth (PD) in the thread-rolling process are calculated according to thread standards and geometric relation. The dimensions of the initial workpiece for the heading process are obtained using the volume constancy law. Considering process limitations to predict the defects, the number of stages is set, and the preform is then determined using the design rule in the heading process. Based on the theoretical design, finite-element (FE)-analysis is conducted. In order to predict the defects and fracture phenomena, the ductile fracture criterion was applied during the heading and trimming processes. The Taguchi method is used to optimize the trimming and thread-rolling process with the set of design parameters, such as the PD, transfer velocity, and revolutions per minute in the thread-rolling process, and the blade radius (BR), land width, and stop distance in the trimming process, respectively. Results show that the PD and BR have the most significant effect on the dimensional accuracy and forming load. To validate the proposed design, the aluminum alloy bolt-forming experiment is performed. We obtain the sound Al6061 alloy M12 hexagonal bolt shaped with highdimensional accuracy. Therefore, this research provides valuable guidelines for the design of the integrated forming process in actual bolt production.
机译：在这项研究中，我们设计了AL6061合金螺栓的集成制造过程，以固定海上平台。该拟议方案包括用于标题，修剪和螺纹轧制过程的理论设计和数值研究。对于理论设计，根据螺纹标准和几何关系计算螺纹轧制过程中的初始杆直径和穿透深度（PD）。使用音量恒定定律获得用于标题过程的初始工件的尺寸。考虑到预测缺陷的过程限制，设置了阶段的数量，然后使用标题过程中的设计规则确定预制件。基于理论设计，进行有限元（Fe） - 分析。为了预测缺陷和裂缝现象，在标题和修剪过程中施加延性裂缝标准。 TAGUCHI方法用于通过螺纹轧制过程中的一组设计参数（例如Pd，转移速度和每分钟转数）来优化修剪和螺纹轧制过程，以及螺纹轧制过程中的每分钟的转数，以及叶片半径（BR），陆地宽度分别在修剪过程中的停止距离。结果表明，PD和BR对尺寸精度和成型负荷有最大的影响。为了验证所提出的设计，进行铝合金螺栓形成实验。我们通过高度精度获得声音AL6061合金M12六角形螺栓。因此，本研究为实际螺栓生产中的综合成型过程设计提供了有价值的准则。

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