Q: We are confused by the word "polishing". Is this the same as polishing?
Q: We are confused by the word "polishing". Is this the same as polishing?
A. The finishing process using abrasive belts is called polishing, and the process of using cloth wheels to coat compounds is called polishing. Polishing produces a brushed or lined finish, polishing removes lines and produces a bright shiny finish. The polishing process generally requires surface refinement and polishing before polishing.
Need to use abrasive belt or grinding wheel polishing to level the surface, remove scratches, pits, oxide scale and fully polish the surface, so that the cutting polishing wheel can remove the polishing line. The first polishing step should be done with the finest abrasive, which can effectively remove welds, level or improve surface defects. From then on, subsequent processes will remove the first polishing scratch.
Each finer polishing step should be cross polished 90 degrees with the previous polishing process. The 320-400 grit polishing line is usually the roughest surface treatment that can be effectively removed by the cutting and polishing process.
Polishing is a rotating cloth wheel impregnated with fine abrasives to produce bright luster on metals and composite materials. The polishing wheel is impregnated with a grease-free composite matrix of liquid rouge or a special fine abrasive called a composite. The compound is sprayed or pressurized into the rotating polishing wheel. The polishing wheel serves as the carrier of the compound, and finally completes the surface treatment.
Cut buff is the course buff process. The cutting polish removes the fine polishing lines, resulting in a smoother lining finish, and the polishing/color polish can be removed. Cutting and polishing is a more difficult polishing process that requires more time, energy and pressure, and will increase operator fatigue.
Surface treatment/color polishing is the best polishing process for surface finishing. Polishing removes the fine lines produced by the cutting and polishing process, while creating a bright luster effect. Polishing is easier, faster and less stressful than cutting and polishing.
Originally published in the July 2017 issue.
Metal manufacturers that use oxygen laser cutting take steps to better prepare parts for powder coating.
The surface finish types of commercially available stainless steel plates are specified in various standards. Two of ASTM A480-12 and EN10088-2; BS 1449-2 (1983) is still available, but no longer valid. These standards are very similar because they define eight surface finish grades for stainless steel. Level 7 is "polished", and the highest polish-so-called mirror polishing-is designated as level 8.
This article is a peer-reviewed and edited version of the NASF SUR/FIN 2012 presentation in Las Vegas, Nevada, June 12, 2012.
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