Development of a Dimensional Measurement Method for Ship Propeller Molds Using 3D Scanning Technology

Near net shape casting is a manufacturing process capable of producing products that closely approximate the desired final shape, thereby reducing machining processes. However, achieving rapid dimensional and geometric accuracy measurement remains a challenge, especially for products with complex geometries. This study presents the use of a 3D scanner as an alternative method to expedite the measurement of dimensional and geometric accuracy. A ship propeller was chosen as the research object due to its relatively complex shape. Dimensional and geometric measurements were conducted on a ship propeller wax pattern made from a silicone rubber mold, simulating the near net shape casting process. The ship propeller wax pattern was scanned in 3D, and the resulting digital data was used to determine its dimensional and geometric accuracy. Measurement results using a 3D scanner on several parts of the ship propeller wax pattern indicated that the dimensional and geometric accuracy achieved was equivalent to manual measurements.