B6

Working Group B | Form-closed joint & Force-closed joint

 
 

Joining by high speed forming by laser induced shock waves

Prof. Dr.-Ing. Frank Vollertsen, BIAS Bremen

 
 

Abstract:

Die diameter: 4 mm, laser pulse energy: 5.6 J, number of pulses: 50, material combination: 1.4301(s0 = 100 µm)/Al99.5(s0 = 50 µm)
Die diameter: 4 mm, laser pulse energy: 5.6 J, number of pulses: 50, material combination: 1.4301(s0 = 100 µm)/Al99.5(s0 = 50 µm)

The need to implement more functionality on the same space drives miniaturization and makes hybrid joints under various conditions also in the micro range necessary. Existing solutions often have restrictions due to the principle of joining.

Therefore this project aims for clarification of open questions which exist regarding joining of copper or aluminum to glas, thermoplastic polymer and copper. To realize this, a plastic forming process based on laser induced shockwaves, which can be named Micro-IHU, will be used. With this sheet-sheet, sheet-pipe and pipe-pipe connecting could be realized. This process offers a chance to overcome the problem of low formability when Tiffany structured base material is used as these do not appear to be so severe for high forming speed. Exploiting of this effect makes an investigation of its cause mandatory. Working assumption is a decrease in orientation related differences of yield stress at high forming speed, resulting in a more homogenous forming. This leads to less local failure of single grains, resulting in a higher formability of the foil as a whole. The advantages of this process shall be applied to the different material combinations.

 

Publications:

2019   
  Joining by laser induced shock waves of aluminum with plastics Veenaas, S; Vollertsen, F
In: 22th International Conference on Material Forming (ESAFORM 2019) (in print)
2018   
  Mechanical Joining of Glass and Aluminium Veenaas, S; Vollertsen, F
In: Key Engineering Materials Vol. 767 (2018) 369-376
2017   
  Crack formation on metal foils during high dynamic and quasi-static bulge test Veenaas, S; Vollertsen, F
In: Proc. Of the 36th IDDRG Conference – Materials Modelling and Testing for Sheet Metal Forming. Journal of Physics 896 (2017) 012072 (online)
  Untersuchung der Verbindungsfestigkeit von Laserschock gefügten Proben bei unterschiedlichen Matrizengeometrien Veenaas, S
In: 8. Kolloquium Mikroproduktion, eds.: F. Vollertsen, C. Hopmann, V. Schulze, J. Wulfsberg. BIAS Verlag Bremen (2017) 237-244 (online)
2016   
  Der Einsatz von laserinduzierten Schockwellen spart Werkzeugkost Veenaas, S
In: Mikroproduktion 5 (2016) 58-60
  Laserinduzierte Schockwellen für die Umformtechnik Veenaas, S
In: Mikroproduktion 06 (2016) 62-63
  Determination of strain rate at laser shock forming Veenaas, S; Vollertsen, F
In: Journal for Technology of Plasticity 41, 2 (2016) 1-9
  Determination of forming speed at a laser shock stretch drawing process Veenaas, S; Vollertsen, F; Krüger, M; Meyer, F; Hartmann, M
In: Proc. of the 7th International Conference on High Speed Forming (ICHSF 2016), eds.: A.E. Tekkaya, M. Kleiner. IUL Dortmund (2016) 105-114
  Influence of undercut geometry on joining strength by laser shock joining Veenaas, S; Yamaguchi, R; Vollertsen, F
In: Proc. of the 5th International Conference on Nanomanufacturing (nanoMan 2016) 15.-17.08.2016 in Macau (online)
2015   
  Areas of application for TEA CO2-Laser induced shock waves Veenaas, S; Vollertsen, F
In: Lasers in Manufacturing (LIM15) eds.: T. Graf, C. Emmelmann, L. Overmeyer, F. Vollertsen (2015) paper no. 165
  Determination of forming limit diagrams for thin foil materials based on scaled Nakazima tests Veenaas, S; Behrens, G; Kröger, K; Vollertsen, F
In: Progress in Production Engineering, WGP Kongress (2015), eds.: J. P. Wulfsberg, B. Röhlig, T. Montag. TransTech Publications Pfaffikon/CH (2015) 190-198
  Forming behavior during joining by laser induced shockwaves Veenaas, S
In: Proc. of the 18th International ESAFORM Conference on Material Forming (ESAFORM 2015), eds. A. Ofenheimer, C. Poletti, D. Schalk-Kitting, C. Sommitsch. Trans Tech Publikcations LTD Pfaffikon/CH (2015) 1451-1456
2014   
  Joining by Laser Shock Forming: Realization and Acting Pressures Veenaas, S; Wielage, H; Vollertsen, F
In: Production Engineering – Research and Development 8, 3 (2014) 283-290
  High Speed Joining by Laser Shock Forming Veenaas, S; Vollertsen, F
In: Proc. of the 6th International Conference on Tribology in Manufacturing Processes & Joining by plastic Deformation (ICTMP), Advanced Material Research, ed. P. Groche. TransTech Publications Durnten-Zurich (2014) 597-606
  High speed joining process by laser shock forming for the micro range Veenaas, S; Vollertsen, F
In: The 6th International Conference on High Speed Forming (ICHSF 2014), eds.: H. Huh, A. E. Tekkaya. Daejeon/Korea (2014) 97-105
 

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