Investigation of the ultrasonic vibration effect in incremental sheet metal forming process

The mechanism of incremental sheet metal forming is based on plastic and localized deformation of sheet metal. The sheet metal is formed using a hemispherical-head tool in accordance with the path programmed into the computer numerical control milling machine controller. Experimental and numerical analyses have been performed previously on the application of ultrasonic vibration to various metal forming processes. However, thus far, the effects of ultrasonic vibration on incremental sheet metal forming have not been investigated. This article presents the process of design, analysis, manufacture and testing of a vibrating forming tool for the development of ultrasonic vibration–assisted incremental sheet metal forming. The results obtained from modal analysis and natural frequency measurement of the vibrating tool confirmed the emergence of a longitudinal vibration mode and resonance phenomenon in the forming tool. Then, the effect of ultrasonic vibration on incremental sheet metal forming was studied. The obtained experimental results from the straight groove test on Al 1050-O sheet metals showed that ultrasonic vibration led to decrease in the following parameters as compared with conventional incremental sheet metal forming: applied force on forming tool axis, spring-back and surface roughness of formed sample.

[1]  F. Vollertsen,et al.  The Mechanisms of Laser Forming , 1993 .

[2]  Hideo Iseki,et al.  Flexible and Incremental Bulging of Sheet Metal Using High-Speed Water Jet , 2001 .

[3]  Klaus Siegert,et al.  Wire drawing with ultrasonically oscillating dies , 1996 .

[4]  Jiromaru Tsujino,et al.  Characteristics of Bending Parts of Metal Plates Using Ultrasonic Bending Systems with a Vibration Punch and a Vibration Die , 1993 .

[5]  K. Siegert,et al.  Superimposing Ultrasonic Waves on the Dies in Tube and Wire Drawing , 2001 .

[6]  Mehdi Vahdati,et al.  An Analytical Model to Reduce Spring-Back in Incremental Sheet Metal Forming (ISMF) Process , 2009 .

[7]  B. Langenecker.  Effects of Ultrasound on Deformation Characteristics of Metals , 1966, IEEE Transactions on Sonics and Ultrasonics.

[8]  J. G. Lewis,et al.  A Shifted Block Lanczos Algorithm for Solving Sparse Symmetric Generalized Eigenproblems , 1994, SIAM J. Matrix Anal. Appl..

[9]  R. E. Green Jnr.,et al.  Non-linear effects of high-power ultrasonics in crystalline solids☆ , 1975 .

[10]  Osamu Miyazawa,et al.  An application of ultrasonic vibration to the deep drawing process , 1998 .

[11]  F. Blaha,et al.  Dehnung von Zink-Kristallen unter Ultraschalleinwirkung , 2004, Naturwissenschaften.

[12]  M. Murakawa,et al.  The utility of radially and ultrasonically vibrated dies in the wire drawing process , 2001 .

[13]  V. S. Senthil Kumar,et al.  Metallurgical analysis and finite element modelling for thinning characteristics of profile forming on circular cup , 2013 .

[14]  Antonio Formisano,et al.  Comparison between analytical and experimental roughness values of components created by incremental forming , 2010 .

[15]  Hideki Aoyama,et al.  Press forming using ultrasonic vibration , 2007 .

[16]  E. Lehfeldt.  Influence of Ultrasonic Vibration on Metallic Friction , 1966 .

[17]  M. Muzzupappa,et al.  Influence of some relevant process parameters on the dimensional accuracy in incremental forming: a numerical and experimental investigation , 2004 .

[18]  D. H. Sansome,et al.  A REVIEW OF THE APPLICATION OF OSCILLATORY ENERGY TO METALS DEFORMING PLASTICALLY , 1968 .

[19]  Subramanian Chezhian Babu,et al.  Experimental studies on incremental forming of stainless steel AISI 304 sheets , 2012 .

[20]  Ghulam Hussain,et al.  Experimental investigations on the role of tool size in causing and controlling defects in single point incremental forming process , 2014 .

[21]  Paul Vanherck,et al.  Experimental study on force measurements for single point incremental forming , 2007 .

[22]  井上 昌夫.  Studies on Ultrasonic Metal Tube Drawing (1) , 1980 .

[23]  Aldo Attanasio,et al.  Optimization of tool path in two points incremental forming , 2006 .

[24]  Julian M. Allwood,et al.  A Novel Method for the Rapid Production of Inexpensive Dies and Moulds with Surfaces Made by Incremental Sheet Forming , 2006 .

[25]  Joost Duflou,et al.  Asymmetric single point incremental forming of sheet metal , 2005 .

[26]  Suck-Joo Na,et al.  Development of irradiation strategies for free curve laser forming , 2003 .

[27]  G. A. Malygin.  Acoustoplastic effect and the stress superimposition mechanism , 2000 .

[28]  Fabrizio Micari,et al.  Shape and dimensional accuracy in Single Point Incremental Forming: State of the art and future trends , 2007 .

[29]  O Lasunon,et al.  Comparative investigation of single-point and double-point incremental sheet metal forming processes , 2007 .

[30]  Gale E. Nevill.  Effect of vibrations on the yield strength of a low carbon steel , 1957 .

[31]  Fabrizio Micari,et al.  A force measuring based strategy for failure prevention in incremental forming , 2006 .

[32]  R Greenjnr.  Non-linear effects of high-power ultrasonics in crystalline solids? , 1975 .

[33]  Mahmoud Farzin,et al.  Influence of ultrasonic vibrations on tube spinning process , 2012 .

[34]  E Hagan,et al.  Analysis of surface roughness for parts formed by computer numerical controlled incremental forming , 2004 .

[35]  Margaret Lucas,et al.  Research applications and opportunities in power ultrasonics , 2009 .

[36]  B. Langenecker.  Work-softening of metal crystals by alternating the rate of glide strain , 1961 .

[37]  D. H. Sansome,et al.  The effect of tool attachment on the resonant characteristics of ultrasonic waveguides , 1970 .