Jurnal Teknik Mesin Mechanical Xplore (JTMMX) Mechanical Engineering Vol. 3 No. 2 (2022) pp. 78-86 p-ISSN: 2746-0045 e-ISSN: 2746-3672 Jurnal Teknik Mesin Mechanical Xplore (JTMMX) 78 Preliminary Study of the Spring-back/Spring-go Phenomenon in the V- Bending Process Using SGCC Steel Thin Material Muhamad Rian Kurniadi 1 , Jatira 1 , Khoirudin 2 , Rizki Aulia Nanda 2 , Rama Kurniawan 2 , Dibyo Setiawan 3* , Otong Jaelani 4 . 1 Department of Mechanical Engineering, Faculty of Engineering, Technology College Wastukancana, Purwakarta, West Java, 41151 2 Department of Mechanical Engineering, Faculty of Engineering, Universitas Buana Perjuangan Karawang, Karawang, West Java, 41361 3* Department Mechanical Engineering, Faculty of Engineering, Mpu Tantular University, Jakarta, Indonesia, 13410. 4 Departement Mechanical Engineering, Faculty of Engineering, Technology College Mandala, Soekarno Hatta No.597, Bandung, West Java, 40284 ABSTRACT This research analyses v-bending results using galvanized SGCC (JIS G 3302) sheet steel. The accuracy of the angle and dimensions of the bending results are the significant elements of the bending process that must be achieved. The bending spring-back/spring-go phenomenon has an impact on bending angle accuracy. If proper parameters are chosen, the spring-tub/spring-go angle should be minimized. This study aimed to see how the proposed v-bending process affected the spring-tub/spring-go angle value. An experimental approach was selected in this study. V-die bending opening, V-die punch angle, V-die punch speed, and bending force are all input parameters for the v-bending process. Meanwhile, in this study, galvanized steel with a thickness of 1.2 mm was used. The results of the ANOVA evaluation showed that the v-die punch speed and bending force are two parameters that affect the response of the variable, with a percentage contribution of 31.0% each. The minimum spring- back angle was found in the second sample, while the minimum spring-go angle was found in the fourth sample. Keywords: ANOVA; Exsperimental method; Spring-back/spring-go; V-bending; V-die punch Article information: Submitted: 26/12/2022 Revised: 29/12/2022 Accepted: 30/12/2022 Author correspondence: * : dibyosetiawan@mputant ular.ac.id Type of article:  Research papers □ Review papers This is an open access article under the CC BY- NC license 1. INTRODUCTIONS Galvanized steel material is a material that has been widely used in recent years in the automotive industry [1], where this material has a good level of corrosion resistance [2]. These advantages have increased the use of galvanized materials by up to 70% [3]. Zinc coating on galvanized steel has its own challenges during the v-bending process. The selection of the right parameters helps to make it easier to obtain information on the occurrence of defects on the zinc surface during the v-bending process on galvanized steel material. The v-bending process is a metal-forming technique that is applied in various manufacturing industries [4]. Some parameters of the bending process that need to be considered include v-bending radius, material thickness, punch angle, holding time, die-punch speed, material temperature and rolling direction [5]. These bending parameters must be controlled because they will affect the results of the expected bending angle and dimensions. The results of the angles and dimensions of the workpiece are a number of output variables that must be achieved in all bending processes. In recent years, research on bending has increased. Research on the topic of bending was carried out in order to find out the phenomena that occur in the bending process, especially related to the accuracy of corner bending [6] [7] [8]. Thipprakmas et al., have investigated the phenomenon of the bending process