Analysis and Prediction of the In-Plane Deformation in Laser Thermal Adjustment

Author:

Shen Hong1,Hu Jun2,Yao Zhenqiang3

Affiliation:

1. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; State Key Laboratory of Mechanical System and Vibration, Shanghai 200240, China e-mail:

2. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

3. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; State Key Laboratory of Mechanical System and Vibration, Shanghai 200240, China

Abstract

Laser thermal adjustment as an application of laser forming in microsystems has received considerable attentions in recent years. This process is a noncontact and high precision forming method. The traditional mechanical microforming technologies for the adjustment step used in microsystem assembly are often limited in their accuracy and are also time consuming. This paper presents an analytical model for describing the in-plane deformation of actuators during laser thermal adjustment. A formula for calculating the in-plane bending angle of the actuator generated by the laser processing is derived. The proposed analytical model is demonstrated by the comparison of the predicted bending angles with the numerical and experimental results. Finally, a formula to predict the possible buckling of the actuator during the laser processing is also developed, from which one can design the opening of the actuator in order to avoid the buckling of the actuator during a heating stage of the process.

Publisher

ASME International

Subject

Industrial and Manufacturing Engineering,Computer Science Applications,Mechanical Engineering,Control and Systems Engineering

Reference13 articles.

1. Esser, G., Schmidt, M., and Dirscher, M., 2003, “Laser Adjustable Actuators for High-Accuracy Positioning of Micro Components,” Proceedings of SPIE, Fourth International Symposium on Laser Precision Microfabrication, I.Miyamoto, A.Ostendorf, K.Sugioka, and H.Helvajian, eds., Bellingham, WA, Vol. 5063, pp. 177–182.

2. Experimental and 3D Finite Element Studies of CW Laser Forming of Thin Stainless Steel Sheets;ASME J. Manuf. Sci. Eng.,2000

3. High Precision Microscale Bending by Pulsed and CW Lasers;ASME J. Manuf. Sci. Eng.,2003

4. Sakkiettibutra, J., Pretorius, T., and Vollertsen, F., 2007, “Modeling of Size Effects for Scaled Laser Beam Forming,” 2nd International Conference on New Forming Technology, Bremen, pp. 645–652.

5. Sakkiettibutra, J., and Vollertsen, F., 2008, “Effects of Varying Heating Duration on Thermal Upsetting,” Proceedings of International Workshop on Thermal Forming, Bremen, pp. 45–54.

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