In modern manufacturing, demands for product surface quality are increasing, especially in the hardware industry. For common products like door handles, the surface finish directly impacts their aesthetics, feel, and market competitiveness. Traditional manual polishing is not only inefficient and labor-intensive, but also difficult to ensure consistent quality. With the rapid development of automation technology, the use of automatic metal polishing machines combined with robotic arms has brought a new, efficient, and precise solution to door handle polishing.