Tyre Test Rig & Road Surface Shell

The typical Road Surface Shell is manually crafted or produced through 3D machining. This involves high unit costs and considerable time, leading to functional issues as outlined below

• Portions that do not match the actual road surface as required by the customer. When produced through manual and machine processes, the road surface is measured using 3D scanning, but the roller fails to connect seamlessly as a whole. Even when creating multiple pieces with one pattern or producing the entire 3D model, errors occur due to data bending during the transformation from road surface (flat data) to circular surface (round data)

Road Surface Shells produced manually or through machining result in noise issues due to problems with run-out, surface flatness tolerances, and connection points between shells

• The displacement difference and run-out values of the surface shell are not consistent, leading to juddering caused by weight imbalance. This phenomenon occurs due to an irregular, non-circular shape, causing an imbalance in the object, akin to a 'bouncing' effect
• Interference and noise occur between shells due to interference and spacing issues (Pop/Crack Noise)

Tapping noise occurs due to pattern discontinuity on each shell, as well as problems with vibration between the steel roller and the shell, and assembly issues

• The steel roller and road surface shell that are mounted do not fully adhere, resulting in noise due to separation
• Noise occurs in the seam area due to the lack of pattern continuity between shells

"As a result of continuous research to address these issues, TeSys has applied aluminum casting methods and subsequently developed a new processing process. After resolving the aforementioned problems, the company has completed full domestication, supplying to major OEM customers such as Hyundai Motor Company and Nexen Tyre and obtaining patents."