Rifqi Shafiyuddin, Christofel Jarot Yudaputranto
This study comprehensively discusses the production process and technical analysis of compression springs at PT. Trijaya Sukses Sejahtera, a company engaged in the manufacture of high-quality springs for various applications, including automotive, machinery, and industrial equipment. The main focus of the study is to understand the production stages, the effect of heat treatment on mechanical properties, and analyze the characteristics of the springs using numerical simulations and field test data. The production process begins with the selection of high-carbon steel (SWPA) material that has good tensile strength and fatigue resistance, the formation of spring geometry using a high-precision CNC coiling machine, followed by a tempering process at a certain temperature to increase the stability of the material's microstructure, and electroplating as a protective layer against corrosion and wear, with the final stage being quality control to check the dimensions, number of turns, compressive strength, and resilience of the springs before packaging. The SolidWorks simulation results show that the analyzed spring has a very high factor of safety (>1.7×10⁹), a maximum elastic strain of 0.81% which is still within the material's elastic limit, and a spring constant of 346.82 N/mm, with small differences to the actual test results caused by environmental factors and imperfections in the manufacturing process. This study emphasizes the importance of optimizing process parameters such as tempering temperature and time settings, adjusting the coiling machine speed, and adjusting the electric current distribution at the electroplating stage to prevent uneven coating, with recommendations for improvement in the form of calibration of simulation models based on laboratory test data, implementation of sensor-based digital inspection for quality control, and evaluation of energy efficiency to improve the quality and competitiveness of spring products in the manufacturing industry.