Experimental study of forming Parts with central blister by Incremental forming process with positive-negative forming pattern

Subject Areas : journal of New Materials

Mostafa Habibnia ¹ (Department of Mechanical Engineering, Islamic Azad University, Jouybar, Iran)
HAmed Dadashpoor ² (Department of Mechanical Engineering, Islamic Azad University, sari, Iran)
Asghar shamsi ³ (Department of Mechanical Engineering, Islamic Azad University, sari, Iran)

Received: 2019-11-25 Accepted : 2020-02-04 Published : 2020-01-21

Keywords: "Two-point incremental Forming, " positive-negative pattern, " 1050 aluminum, " central hole die",

Abstract :

Nowadays, by technology progression (CAD), controlling tools movement in Incremental forming process, caused improvement of forming function mechanism-manufacturing symmetrical and asymmetrical pieces, as by determination of an ideal direction pattern and the way of contacting tools with pieces, Caused improvement of forming behavior in sheet metals and geometry firming of complicated forms, was used in airspace and auto-making industries. In present research two-point incremental forming of sheet metal was studied experimentally by investigating priority of tool movement in negative and positive limit of geometrical profile in central cavity die. Moving pattern of tools rotationally and spindle axis constant of system (Z) around die geometrical profile, was investigated for positive and negative forming. Used sheet metal in this research is 1050 Aluminum with 15mm thickness. The results of die geometrical profile showed that critical area with maximum thinning led to tearing of all samples of sheet metals in negative forming limit while moving pattern of rotator caused decrease of tearing rate and thinning relative to constant tools in sheet metal. Maximum rate of deep, formed in negative critical area of die geometrical profile, occurrence time of tearing in sheet metal Z= -25.2mm in rotational case of tools with first negative and second positive forming pattern, is the most ideal two-point forming case in central cavity pieces.

References:

1- L. Van Sy, "Modeling of single point inCcremental forming process for metal and polymeric sheet", University of padua, Ph.D. Thesis, 2009.      

2- محمدرضا ساختمانیان ، محمد هنرپیشه و سعید امینی، بررسی تأثیر ارتعاشات فراصوت بر خواص مکانیکی ورق دو لایه فولاد کم کربن تیتانیوم خالص در فرآیند شکل دهی افزایشی، مجله مواد نوین/ جلد 8/شماره 4/ تابستان 1397.

3 -E. Leszak, "Apparatus and process for incremental dieless forming", Google Patents, 1967.      

4 -K. Kitzawa, "Incremental Sheet Metal Stretch-Expanding with CNC Machine Tools", In Proc. of the 4th ICTP conference, 1993.

5- N. Powell and C. Andrew, "Incremental forming of flanged sheet metal components without dedicated dies", In Proc. of the IMechE, Journal of Engineering Manufacture - Part B, vol. 206, pp. 41-47, 1992. 

 

 

6- I. Paniti1, J. Somló "Novel Incremental Sheet Forming System with Tool-Path Calculation Approach",Acta Polytechnica Hungarica 11(7):43-60 · January 2014.

7- C. Henrard, " Numerical Simulations of the Single Point Incremental Forming Process", Universite de Liege, Ph.D. Thesis, 2008.

8- M. S. Shim and J. J. Park, "The formability of aluminium sheet in incremental forming", Journal of Materials Processing Technology, Vol. 113, p.p. 654-658, 2001.         

9- Y.H. Kim, J.J. Park, "Effect of process parameters on formability in incremental forming of sheet metal", Journal of Materials Processing Technology, Vol. 130‐131, No.2, pp. 42‐46, 2002.         

10- F. Micari, G. Ambrogio, and L. Filice, "Shape and dimensional accuracy in Single Point Incremental Forming: State of the art and future trends", Journal of Materials Processing Technology, Vol. 191, p.p. 390–395, 2007.

11- P. Suriyaprakan, "Single Point Incremental Forming and Multi-Stage Incremental Forming on Aluminium Alloy 1050", Thammasat University, Master Thesis, 2013.   
 

12- Y.H. Kim, J.J. Park, "Effect of process parameters on formability in incremental forming of sheet metal", Journal of Materials Processing Technology, Vol. 130‐131, No.2, pp. 42‐46, 2002.         

13- L. Jun-chao, L.Chong, Z. Tong-gui, "Thickness distribution and mechanical property of sheet metal incremental forming based on numerical simulation", Transactions of Nonferrous Metals Society of China, Vol. 22, Suppl.1, pp. s54-s60, 2012.          

14- K. Hamilton and J. Jeswiet, "Single point incremental forming at high feed rates and rotational speeds: Surface and structural consequences", CIRP Annals-Manufacturing Technology, Vol. 59(1), p.p. 311-314, 2010.

15- G. L. Manco, G. Ambrogio, "Influence of thickness on formability in 6082-T6", International Journal of Material Forming, Vol. 3, Suppl.1, pp.983-986, 2010.          

16- A. Fiorentino, "Force-based failure criterion in incremental sheet forming", International Journal of Advanced Manufacturing Technology, Vol. 68, p.p. 557-563, 2013.           

17- A. Pak, H. Deilami Azodi, M. Mahmoudi, Investigation of Ultrasonic assisted incremental sheet metal forming process, Modares Mechanical Engineering, Vol. 14, No. 11, pp. 106-114, 2014 (In Persian).

18- M. J. Mirnia, B. Mollaei Dariani, An investigation on multistage incremental forming to control thinning in a truncated cone of an aluminum alloy sheet, Modares Mechanical Engineering,Vol. 14, No. 14, pp. 262-270, 2015 (InPersian).

 

19- A. Zahedi, B. Mollaei-Dariani, M. R. Morovvati, Numerical and experimental investigation of single point incremental forming of two layer sheet metals, Modares Mechanical Engineering, Vol. 14, No. 14, pp. 1-8, 2015 (In Persian).

 

20- A. Barani Shooli, S. Amini Nahjafabadi, M. Farzin, Experimental Formability Investigation of Titanium Alloy in Hot Incremental Sheet Forming Process, Modares Mechanical Engineeringǡ Vol. 15ǡ No. 6, pp. 107-114, 2015 (In Persian).

 

21- A. H. Nikdooz, M. J. Mirnia, H. Baseri, Study of formability of aluminum truncated pyramid in single-stage and two-stage incremental sheet forming, Modares Mechanical Engineering,Vol. 16, No. 5, pp. 210-220, 2016 (in Persian).    
 

22- Seyed Ali Asghar Asghari, Asghar Shamsi Sarband and Mostafa Habibnia, Optimization of multiple quality characteristics in two-point incremental forming of aluminum 1050 by grey relational analysis, Proc IMechE Part C, 2017.  

23- M. Safari, Two Point Incremental Forming of a Complicated Shape with Negative and Positive Dies, IJMF, Iranian Journal of  Materials Forming, Vol. 4, No. 2, pp 51-61,Printed in The Islamic Republic of Iran, 2017.