Preparation and natural frequency analysis of CFRP optical system rack for 3D automatic optical inspection machine

doi:10.19936/j.cnki.2096-8000.20230128.008

Abstract

Abstract: Automatic optical inspection machine (AOI)is used to detect the welding defects on the surface of printed circuit board (PCB). The vibration of the rack of the optical system affects its accuracy and efficiency. In order to improve the detection accuracy and efficiency of AOI machine, carbon fiber composite material (CFRP) was used instead of aluminum alloy to design and manufacture the rack, and the finite element software ABAQUS was used to model the CFRP rack and aluminum alloy rack for calculating natural frequency and vibration mode. The results of percussion experiments on the CFRP rack and the aluminum alloy rack are basically consistent with the simulation results, and the error is less than 16%. Compared with the aluminum alloy rack, the first-order natural frequency of CFRP rack is increased by 8.51%. Finally, the high-speed imaging test results of the two kinds of rack show that the AOI equipment installed with CFRP rack has higher imaging accuracy, better stability and higher efficiency.

Key words: CFRP, automatic optical inspection, natural frequency, rack, percussion experiment

CLC Number:

TB332

LI Lei, CAO Dongfeng, JI Yundong, LIU Pengfei, TAN Yongqing, CHEN Jianping. Preparation and natural frequency analysis of CFRP optical system rack for 3D automatic optical inspection machine[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(1): 70-76.

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