An Inexpensive, Portable Machine to Facilitate Testing and Characterization of the Friction Stir Blind Riveting Process

Author(s):  
A Zachary Trimble ◽  
Brennan Yammamoto ◽  
Jingjing Li

The expanding use of materials that are difficult to join with traditional techniques drives an urgent need, in a wide array of industries, to develop and characterize production capable joining processes. Friction stir blind riveting (FSBR) is such a process. However, full adoption of FSBR requires more complete characterization of the process. The relatively inexpensive, portable FSBR machine discussed here facilitates in situ X-ray imaging of the FSBR process, which will enhance the ability of researchers to understand and improve the FSBR process. Real-time, unobstructed, angular X-ray access drives the functional requirements and design considerations of the machine. The acute angular access provided by the machine necessitates tradeoffs in stiffness and Abbe errors. An error budget quantifies the effect of the various trade-offs on likely sensitive directions and relationships. Additionally, the machine motivates more test parameters important to machine designers (e.g., parallelism and runout) that have not yet been explored in the literature. Ultimately, a machine has been developed, which has a single rotational axis that translates parallel to the rotational axis, can be built for under $12,000, has a mass of less than 110 kg, measures 915 mm × 254 mm × 624 mm, has a rotational speed range of 400–8000 RPM, has a feed rate range of 0.1–200 mm/min, can be installed on most test benches, has total rivet runout of 0.1 mm, has plunge and rotational axis parallelism of less than 0.1 deg, and has a plunge axis repeatability of better than 2  μ m over a 10 mm range.

2004 ◽  
Author(s):  
Santosh V. Vadawale ◽  
Jae Sub Hong ◽  
Jonathan E. Grindlay ◽  
Peter Williams ◽  
Minhua Zhang ◽  
...  

2018 ◽  
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pp. 1616-1622 ◽  
Author(s):  
Victor Asadchikov ◽  
Alexey Buzmakov ◽  
Felix Chukhovskii ◽  
Irina Dyachkova ◽  
Denis Zolotov ◽  
...  

This article describes complete characterization of the polygonal dislocation half-loops (PDHLs) introduced by scratching and subsequent bending of an Si(111) crystal. The study is based on the X-ray topo-tomography technique using both a conventional laboratory setup and the high-resolution X-ray image-detecting systems at the synchrotron facilities at KIT (Germany) and ESRF (France). Numerical analysis of PDHL images is performed using the Takagi–Taupin equations and the simultaneous algebraic reconstruction technique (SART) tomographic algorithm.


2018 ◽  
Vol 89 (10) ◽  
pp. 10G124 ◽  
Author(s):  
C. Stoeckl ◽  
T. Filkins ◽  
R. Jungquist ◽  
C. Mileham ◽  
N. R. Pereira ◽  
...  
Keyword(s):  
X Ray ◽  

2019 ◽  
Vol 66 (1) ◽  
pp. 518-523
Author(s):  
Madan Niraula ◽  
Kazuhito Yasuda ◽  
Shintaro Tsubota ◽  
Taiki Yamaguchi ◽  
Junya Ozawa ◽  
...  

2014 ◽  
Vol 9 (05) ◽  
pp. C05017-C05017 ◽  
Author(s):  
C Ponchut ◽  
M Ruat ◽  
J Kalliopuska

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