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Thesis Xiaoyu(Shorey) Song.pdf (8.34 MB)

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The Impact Of Wood Species, Applied Force, And Sander Movement Speed On The Occurrence Of Swirl Scratch From Random Orbit Sanding

Song, Xiaoyu
http://orcid.org/0000-0002-2945-7931
http://rave.ohiolink.edu/etdc/view?acc_num=case159708750857781

Abstract Details

2020, Master of Sciences, Case Western Reserve University, EECS - Electrical Engineering.
Swirl scratches have been an undesirable outcome of using a random orbit sander to work on wood surfaces. In other studies, the experiments have been mostly focused on the surface roughness grading of the wood surface sanded by industrial sanding equipment such as belt sanders. In real life, the usage of random orbit sander is quite popular as it is more portable and cost-effective in either construction or hobbyist projects. In addition, the occurrence of swirl scratches is usually more undesirable than a rougher surface, since the swirl scratches stand out, while the surface roughness is relatively even across the entire surface. Accordingly, this study is conducted to mimic the more common sanding conditions in routine applications; it focuses on the occurrence of swirl scratches instead of surface roughness. Experiments include the effect of different factors, including the Janka hardness of the wood species, softwood or hardwood category of wood species, the abrasiveness of the sandpaper, the downforce applied on the sander by the operator, and the movement speed of the sander. Different wood species of Radiata pine (Pinus radiata), white poplar (Populus tremuloides), cedar (Cedrus), northern red oak (Quercus rubra), black walnut (Juglans nigra), and purpleheart (Peltogyne) samples were used in this study. xi The applied force on sander is measured by a force-sensing resistor and was set to approximately 20N, 50N, and 100N. The movement speed was monitored by a 3-axial accelerometer, and three different moving speeds were used in the experiment. The collected experiment data were analyzed using a combination of t-test, correlation test, analysis of variance, and other statistical models. The result shows that the likelihood of getting swirl scratches on the wood surface sanded by random orbit sanders is negatively correlated to the Janka hardness value and the grit number of the sandpaper. The hardwood category of wood species is found to be more resistant to swirl scratches from sanding than the softwood species. The results also show a positive correlation between the likelihood of getting scratches and the moving speed of the sander. Future studies shall focus on implementing image processing algorithms and high definition imaging systems for scratch characterization, as well as considering other factors that may also affect the likelihood of getting swirl scratches from random orbit sanding.
Mehran Mehregany (Advisor)
Michael Fu (Committee Member)
Vira Chankong (Committee Member)
80 p.
Electrical Engineering; Wood
Random Orbit Sanding, Swirl Scratches, Force Sensor, Accelerometer, Wood Species, Sandpaper Abrasiveness, Applied Force on Sander, Sander Movement Speed

Recommended Citations

Citations

  • Song, X. (2020). The Impact Of Wood Species, Applied Force, And Sander Movement Speed On The Occurrence Of Swirl Scratch From Random Orbit Sanding [Master's thesis, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case159708750857781

    APA Style (7th edition)

  • Song, Xiaoyu. The Impact Of Wood Species, Applied Force, And Sander Movement Speed On The Occurrence Of Swirl Scratch From Random Orbit Sanding. 2020. Case Western Reserve University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case159708750857781.

    MLA Style (8th edition)

  • Song, Xiaoyu. "The Impact Of Wood Species, Applied Force, And Sander Movement Speed On The Occurrence Of Swirl Scratch From Random Orbit Sanding." Master's thesis, Case Western Reserve University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case159708750857781

    Chicago Manual of Style (17th edition)

case159708750857781
551
© 2020, some rights reserved.Creative Commons License The Impact Of Wood Species, Applied Force, And Sander Movement Speed On The Occurrence Of Swirl Scratch From Random Orbit Sanding by Xiaoyu Song is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.