Reliability and light weight contribute to the improvement of fuel economy ~ Japan NSK Seiko Co., Ltd., using unique cold forging technology, successfully developed light weight, safe and reliable components used in electric power steering (hereinafter referred to as EPS), Help improve the fuel economy of the car. NSK will vigorously promote the application of this technology on a global scale, especially for small and medium-sized models with high fuel efficiency. PROCESSING METHOD DEVELOPMENT BACKGROUND Global warming is becoming a topic of worldwide concern. Automobiles used for daily transportation are required not only to improve fuel economy, but also to ensure the safety of important components such as EPS from the development stage, while promoting product miniaturization, weight reduction, and environmental protection. The characteristics of the processing method The unique cold forging forming technology successfully developed by NSK has realized the lightweight of EPS parts and improved safety and reliability. The splined solid shaft becomes hollow, and the yoke hollow shaft becomes thinner, but the transmittable torque is increased by 15% compared with before, and the entire column is 2.5% lighter than before. In addition, the two parts that originally needed to be welded were integrated to further improve safety and reliability. 1. Through cold forging to achieve lightweight, the solid shaft is hollowed out. The hollow shaft is thinner and lighter. 2. Improved reliability through integration of cold-forging Combined with engineering, the safety and reliability have been further improved. Application of processing method NSK will apply this processing method to products of small and medium-sized cars on a global scale. The effect of the processing method is to further improve energy saving and environmental protection through light weight, and it is safer to reduce CO2 emissions during production (cancellation of welding work). NSK has further improved the safety, environmental protection and comfort of vehicles through the use of the most advanced technology. In the future, with the improvement of products and the promotion of localized procurement and local production, it will definitely bring about the rapid development of NSK's global steering gear business and the increase in revenue.