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IJAT Vol.16 No.1 pp. 60-70
doi: 10.20965/ijat.2022.p0060
(2022)

Technical Paper:

Polishing Performance of a Recycled Grinding Wheel Using Grinding Wheel Scraps for the Wet Polishing of Stainless-Steel Sheets

Akira Mizobuchi*,†, Takeshi Hamada*, Atsuyoshi Tashima**, Keita Horimoto*, and Tohru Ishida*

*Tokushima University
2-1 Minamijosanjima-cho, Tokushima-shi, Tokushima 770-8506, Japan

Corresponding author

**Ishihara Kinzoku Co., Ltd., Tokushima, Japan

Received:
May 31, 2021
Accepted:
July 6, 2021
Published:
January 5, 2022
Keywords:
wet polishing, grinding wheel, polyvinyl alcohol, organic titanium compound, stainless steel
Abstract

The surfaces of large austenitic stainless-steel sheets, which have side lengths of at least 1 m a sheet thickness of at least 6 mm, used for food tanks and sliding plates in seismic isolation devices, must be finished to a mirror surface. Polishing is performed to improve the surface quality of such sheets and dry machining is typically applied. The problems associated with dry machining are the exhaust heat of machining and treatment of chips. A transition to wet machining is required to solve these problems. In our laboratory, we have developed a wet polishing machine and researched the selection of grinding wheels to develop wet polishing technology for large stainless-steel sheets. In this study, to reduce tool cost and reuse resources, we attempted to manufacture a recycled grinding wheel using snippets of grinding wheel scraps. A polyvinyl alcohol (PVA) aqueous solution was used as the bonding agent for the recycled grinding wheel to reduce environmental load. To overcome the ease of dissolution of PVA in water, we attempted to improve the water resistance of the PVA aqueous solution by incorporating an organic titanium compound. This is one of our efforts to contribute to sustainable development goals. The results are summarized below. (1) A recycled grinding wheel was fabricated by kneading crushed pieces of grinding wheel scrap with a bonding agent. (2) The maintenance of the shape of the recycled grinding wheel was controlled by the concentration of the bonding agent. (3) The recycled grinding wheel with a PVA bonding agent was vulnerable to water. In contrast, the recycled grinding wheel to which the organic titanium compound was added exhibited improved water resistance. (4) The polishing of stainless-steel sheets using the plain PVA recycled wheel was relatively ineffective, but polishing using the recycled wheel with the titanium additive was comparable to polishing with a new grinding wheel.

Cite this article as:
Akira Mizobuchi, Takeshi Hamada, Atsuyoshi Tashima, Keita Horimoto, and Tohru Ishida, “Polishing Performance of a Recycled Grinding Wheel Using Grinding Wheel Scraps for the Wet Polishing of Stainless-Steel Sheets,” Int. J. Automation Technol., Vol.16, No.1, pp. 60-70, 2022.
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Last updated on Jan. 24, 2022