Ultrasonic Self-Fusion Rivet Welding of CF/PA6 to 6061 Aluminum Alloy

doi:10.16183/j.cnki.jsjtu.2021.289

Abstract

Abstract:

In order to further improve the strength between carbon fiber reinforced thermoplastic (CFRTP) and lightweight metals, a novel ultrasonic self-fusion riveting method is proposed, in which carbon fiber reinforced polyamide 6(CF/PA6) is melted by ultrasonic welding and pressed into the prefabricated hole on the aluminum alloy plate to realize the join between CF/PA6 and aluminum alloy. The joining mechanism is mechanical self-locking. The results show that the overall mechanical performances increase with the increase of the number of holes. The optimal welding energy is 2 000 J and the maximum shear strength is (58.9 ± 7.1) MPa. According to the welding power and welding displacement signal, the ultrasonic self-fusion riveting process can be divided into the pressing stage, the energy director embedding stage, and the hole filling stage. When the energy is constant, with the increase of the number of holes, the energy director will be embedded into CF/PA6 earlier, and the welding time will be shortened. Compared with the welding energy, the number of holes has a greater impact on the welding process. Because ultrasonic self-fusion riveting mainly realizes the join between CFRTP and metal through mechanical self-locking, this method is not limited by metal types and has a broad application prospect.

Key words: ultrasonic plastic welding, carbon fiber reinforced thermoplastic (CFRTP), aluminum alloy, dissimilar materials joining

CLC Number:

TG453+.9

YANG Yuanduo, LI Yang, LIU Zeguang, WANG Kaifeng, AO Sansan. Ultrasonic Self-Fusion Rivet Welding of CF/PA6 to 6061 Aluminum Alloy[J]. Journal of Shanghai Jiao Tong University, 2023, 57(2): 221-229.

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文献	材料	处理方法	最优接头强度/MPa
文献[16]	CF/PA6钛合金	对金属板进行氧化处理	约7.5
文献[8]	CF/PA66016铝合金	对金属板表面进行激光处理	约14
文献[12]	CF/PA6A1050铝合金	在金属表面制造纳米级尖锐凸起	24.9
文献[11]	CF/PA67075-T6	对金属板表面进行纳秒激光处理	37.5