Hybrid Incremental Forming: Investigation on Localized Thinning and Thickness Distribution in Formed Parts
In the present experimental work, hybrid incremental sheet forming (HISF) process comprising stretch forming followed by single point incremental sheet forming (SPIF) is developed for forming conical frustum. Experimental investigation is done to find the
- PDF / 491,916 Bytes
- 11 Pages / 439.37 x 666.142 pts Page_size
- 24 Downloads / 182 Views
Abstract In the present experimental work, hybrid incremental sheet forming (HISF) process comprising stretch forming followed by single point incremental sheet forming (SPIF) is developed for forming conical frustum. Experimental investigation is done to find the influence of process parameters on thickness distribution and localized thinning in the formed parts. Experimental result reveals that stretching has a substantial effect on localized thinning in formed parts. Small improvement in the thickness distribution and localized thinning is found in formed parts. Experimental investigation on the influence of preform tool shape is also done to further improve thickness distribution. It is observed that the geometry of preform tool and amount of stretching has a great influence on thinning and thickness distribution. It is found that intermediate preform tool size and small amount of preforming results in forming conical frustum having uniform thickness distribution. Also, a considerable reduction in forming time using developed HISF process is observed as compared to SPIF process alone. Keywords Hybrid incremental sheet forming · Stretch forming · Single point incremental forming · Thickness distribution · Localized thinning
R. Jagtap (B) School of Mechanical Engineering, MIT World Peace University, Pune 411038, India e-mail: [email protected] V. Sisodia · K. More · S. Kumar Department of Mechanical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat 395007, India e-mail: [email protected] S. Kumar e-mail: [email protected] © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021 N. Gascoin and E. Balasubramanian (eds.), Innovative Design, Analysis and Development Practices in Aerospace and Automotive Engineering, Lecture Notes in Mechanical Engineering, https://doi.org/10.1007/978-981-15-6619-6_16
151
152
R. Jagtap et al.
1 Introduction Incremental forming (ISF) process is a novel, flexible sheet metal forming process. It is also called as a die-less forming process because it does not require a dedicated die for forming sheet metal parts [1]. Virtually, any part shape can be formed using ISF process with minimum tooling setup, as parts using ISF are formed using a numerically controlled machine such as CNC milling machine or a numerically controlled robot arm [2]. It has a short setup time as well as lower production cost for producing small number of different part shapes [3]. It offers many advantages over conventional sheet metal forming method such as improved material formability, small forming forces, die-less forming, short changeover time from one part shape to other and design changes are quickly and easily carried out [4]. ISF has already been used to form a variety of parts such as aircraft cowling [5], different aerospace components [6], human prosthesis reconstruction [7], cranial implant [8], knee joint [9], solar cooker [10], and car exterior skin part [11]. Despite its advantages ove
Data Loading...
