Marble renovation requires a gentle and gradual approach. In the restoration of the thousand-year-old ancient temple in Athens, the marble has a Mohs hardness of 3-4, with a relatively soft but brittle texture. I chose a low-speed start, beginning at 800 rpm, using a resin-based diamond grinding disc, with the grit size gradually transitioning from 50 mesh to 3000 mesh. The grinding disc I used had a fan-shaped design, with distributed contact pressure to avoid local overheating and stone cracking. The cooling system I employed was clean water, with a flow rate controlled at 2L/min, for both cooling and flushing debris. During the actual test, my equipment restored the glossiness of the 200-year-old marble floor from 35GU to 85GU, with the material removal controlled within 0.3mm.
Granite processing requires powerful cutting. In the renovation of the granite floor in a Brazilian church, the material has a Mohs hardness of 6-7 and contains quartz components. I chose a high-speed rotation plan, starting at 1500 rpm, using a metal-bonded diamond grinding disc, with a diamond concentration of 25%. I specially optimized the self-sharpening of the grinding disc to ensure sharpness throughout the grinding process. The dust removal system I strengthened to 99.9% efficiency because quartz dust from granite is highly harmful. During the three-year project, my equipment processed 12,000 square meters of granite, with an average thickness removal of 1.2mm, and the glossiness reached 90GU.
Metal polishing pursues surface consistency. In the precision machinery workshop in Germany, the stainless steel workbench needs to achieve a surface roughness of Ra0.2μm. I chose a variable-speed grinding machine, with rotational speeds adjustable from 200 to 3000 rpm continuously. I used a wool wheel combined with diamond grinding paste, with the grit size gradually transitioning from W40 to W1. The pressure control system I precisely controlled to 5kg increments to ensure no deformation on thin-walled parts. In the acceptance test, the standard deviation of the polished surface roughness was only 0.02μm, fully meeting the requirements of precision processing.
Epoxy floor treatment focuses on coating compatibility. In the electronics factory in Japan, the old epoxy coating needed to be removed and re-applied. I chose a professional grinding disc with a hard alloy tip, with rotational speeds controlled below 1000 rpm to avoid overheating and toxic gas production. The dust removal system I integrated was activated carbon filtration to remove volatile organic compounds. During the actual test, my equipment removed at a rate of 15 square meters per hour, with the base layer damage controlled within 0.1mm, providing a perfect foundation for the new coating.
Special material processing requires customized solutions. In the art studio in the Netherlands, I needed to polish colored resin artworks without causing scratches. I developed an ultra-fine polishing system, using nano-diamond spray and a sponge polishing pad. The rotational speed was controlled at 500-800 rpm, with a pressure not exceeding 5kg. In the laboratory in Switzerland, I needed to polish optical glass without altering its optical properties. I used cerium oxide polishing solution, combined with a dedicated polishing pad, with a surface flatness reaching λ/10.
Material identification system is my latest innovation. Through analysis of grinding sounds and resistance, the equipment can automatically identify the current material type being processed and call up the preset best parameters. In the comprehensive material engineering in Australia, this system increased the processing qualification rate from 82% to 96% under the condition of frequent material changes.
