Machine Tonnage Optimization by Reused Scrap Material Applied for Car Propeller Shaft Guard

The purpose of this research is to analyze how the scrap material or metal scrap can be reused as a regular material in a production process. The reused scrap material is prepared to use in propeller shaft guard production. This propeller shaft guard is used with the main function to guard the propeller shaft in the car. Therefore, calculating the total mass of the scrap material and propeller shaft guard is needed to know the ratio of the usage of material, the machine tonnage calculation for propeller shaft guard production using reused scrap material, and the new design for blanking material. The total machine tonnage for producing propeller shaft guard using reused scrap material is 260.09 T. The new design for the propeller shaft guard can fit the reused scrap blanking material is created. The total usage of scrap material increased from 49.46% to 79.69% after the material was used in the propeller shaft guard production. The comparison between the condition before and after using reused scrap material as the propeller shaft guard indicates the factors of the total amount of blanking material, the total amount of dies, and dandori are described in this research.