Mechanical and Laser Micro Deep Drawing

2007 ◽  
Vol 344 ◽  
pp. 799-806 ◽  
Author(s):  
H. Schulze Niehoff ◽  
Zhen Yu Hu ◽  
Frank Vollertsen
Keyword(s):  
Shock Wave ◽  
Size Effects ◽  
Deep Drawing ◽  
Thermal Stresses ◽  
Laser Forming ◽  
Drawing Process ◽  
Deep Drawing Process ◽  
Plasma Generation ◽  
Micro Deep Drawing ◽  
Explosive Forming

Mechanical micro deep drawing becomes a more and more industrial relevant process. But due to size effects new challenges are involved in this process compared to macro deep drawing. The size effects cause an increase of friction and thus hinder the material flow. The change of friction in mechanical micro deep drawing is subject of the presented investigations in this paper. Additionally to this, a new non-mechanical micro deep drawing process is presented, whereby a laser beam acts as a punch. This new laser deep drawing process is based on a totally different mechanism compared to thermal laser forming, e.g. forming by laser induced thermal stresses: The laser produces a pulse with an extremely high power density, which causes plasma generation at the target and thus a shock wave. The shock wave can be used as in explosive forming, but is smaller and easier to generate. Recent investigations showed that using this technology laser deep drawing is possible with a sheet metal out of Al 99.5 and a thickness of 50 'm. The deep drawing process was carried out with a die diameter of 4 mm and shows promising results.

The Annealing Effects on the Formability of T2 Copper Foil in Micro Deep Drawing Process by Laser Driven Flyer

2013 ◽  
Vol 579-580 ◽  
pp. 35-40
Author(s):  
Yang Hu ◽  
Hui Xia Liu ◽  
Chun Xing Gu ◽  
Zong Bao Shen ◽  
Xiao Wang
Keyword(s):  
Plastic Deformation ◽  
Deep Drawing ◽  
Material Flow ◽  
Copper Foil ◽  
Deformation Capacity ◽  
Drawing Process ◽  
Deep Drawing Process ◽  
Micro Deep Drawing ◽  
Annealing Effects ◽  
Cold Rolled

In this paper, cold-rolled T2 copper foils with the thickness of 50 were chosen. The foils were annealed at different temperatures, namely, 250°C, 350°C, 450°C, 550°C, respectively. Micro deep drawing experiments on cold-rolled foils and annealed foils by laser driven flyer were achieved in order to investigate annealing effects on the formability of T2 copper foil. The forming depth and material flow uniformity of the workpiece at different conditions were compared and analyzed. The test results showed that: (1) The workpiece of cold rolled foil indicates poor neutral, non-uniform material flow, smaller forming depth, it is due to that the microstructures of cold-rolled foil are fiber organizations, which leads to poor plastic deformation capacity.(2)Annealing can significantly improve the formability of the foil. In the first stage : 250-350°C, recovery and recrystallization occurred in succession in the organization of the raw material, fibrous tissue transformed into equiaxed grains, the residual stress is greatly reduced, thus, the plastic deformation capacity is recovered. The forming depth is also significantly improved, increasing by about twice. In the second stage: 350-450°C, the enhanced formability is relative to the surface layer effect, which is also a reflection of micro-scale effect. This study provided a theoretical and experimental guidance for the practical application of micro deep drawing process by laser driven flyer.

Study on Simulation and Experiment of Micro Sheet Metal Forming

2014 ◽  
Vol 941-944 ◽  
pp. 1876-1881 ◽  
Author(s):  
Yue Zhao ◽  
Liang Luo ◽  
Zheng Yi Jiang ◽  
Xiao Ming Zhao ◽  
Di Wu
Keyword(s):  
Deep Drawing ◽  
Fem Simulation ◽  
Drawing Process ◽  
The Finite Element Method ◽  
Micro Forming ◽  
Forming Process ◽  
Deep Drawing Process ◽  
Manufacturing Method ◽  
Micro Deep Drawing ◽  
Simulation And Experiment

In the last few decades, there is a global interest in micro products, and micro forming of metals is a promising micro manufacturing method. However, a comprehensive understanding of this process is absent. Therefore, this study aims to investigate micro deep drawing process via experimental and analysis work. Simulation results are in good agreement with the experimental data. The comparison between the finite element method (FEM) simulation and experimental results shows the feasibility of FEM simulation for micro deep drawing process. This research also lays a fundament of investigating micro forming process, especially micro deep drawing.

Influence of Surface Effect On Nickel Micro Deep Drawing Process

2010 ◽  
Author(s):  
C. Keller ◽  
M. Afteni ◽  
M. Banu ◽  
A. M. Habraken ◽  
E. Hug ◽  
...  
Keyword(s):  
Deep Drawing ◽  
Surface Effect ◽  
Drawing Process ◽  
Deep Drawing Process ◽  
Micro Deep Drawing
Sign in / Sign up

Export Citation Format

Share Document