Abstract
ESC’s solenoid valves independently brake each wheel, allowing the vehicle to maintain braking and directional stability. The most important component of the solenoid valve is the armature manufactured by the turning process by a CNC lathe so far. In this study, we propose to use the multi-stage cold forging process as an alternative to reduce manufacturing cost while satisfying dimensional accuracy and performance. To apply the multi-stage cold forging process, the whole forming process is divided into six stages to improve the dimensional accuracy of the outer diameter, full length and slot part of the armature. It is divided into 6 stages, but 6 stages are operated simultaneously in one stroke of forging. Inducing uniform plastic deformation by designing the preform for each stage of the armature slot. Through the proposed process design for the multi-stage cold forging process, the dimensional accuracy of the test product can be improved. The weight of the input material in the turning process can be reduced by 46 % from 3.5 g to 1.9 g by applying the multi-stage cold forging process. In addition, the manufacturing process can be reduced from 2 processes to 1 process, and the production quantity can be increased by 2500 % from 180 ea to 4800 ea per hour.
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Abbreviations
- B :
-
Magnetic flux density, T
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Acknowledgments
This study was conducted under a purchase-linked project for small and medium-sized commercialization technology development and purchase conditional new technology development of the Ministry of SMEs and Startups. We thank the Ministry of SMEs and Startups for its support (S2860926) and the Korea Institute of Industrial Technology as “Development of intelligent root technology with add-on modules (KITECH Eo-200017). The performance test of the ESC assembly was conducted at EREA AMS Co., Ltd., Dalseong-gun, Daegu, Korea 42981.
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Hak-Sun Lee is Ph.D. student at Kyung-pook National University, Korea. He received his M.S. degree in Behavior of Fretting Fatigue at the Youngnam University. His research interests include forging analysis, machining characteristic and solenoid valve design in R&D Center of Sungjin Fo-Ma.
Young-Suk Kim received his M.S. degrees from the Department of Mechanical Engineering at Seoul National University in 1981. He obtained his Ph.D. degree from the Department of Mechanical Engineering at Kobe University in 1986. He is currently a Professor in the Department of Mechanical Engineering at Kyungpook National University. His research interests are production engineering, plasticity, nano/micromechanics, FEM and biomechanics.
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Lee, HS., Park, SG., Hong, MP. et al. Process design of multi-stage cold forging with small size for ESC solenoid valve parts. J Mech Sci Technol 36, 359–370 (2022). https://doi.org/10.1007/s12206-021-1235-3
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DOI: https://doi.org/10.1007/s12206-021-1235-3