Effect of heating elements optimization design on resistance welding of 7075 aluminum alloy and CF/PEEK

doi:10.19936/j.cnki.2096-8000.20260528.009

Abstract

Abstract: As a key interface material in resistance welding, the type of heating elements and welding parameters directly affect the mechanical properties of welded joints. Through the optimization of the preparation process of heating elements, it is found that their wettability, thermal stability and mechanical properties can meet therequirements forresistance welding of 7075 aluminum alloy (7075AA) and carbon fiber reinforced polyether ether ketone (CF/PEEK) composites. The effects of stainless steel mesh heating elements (SS-HEs) and carbon fiber heating elements (CF-HEs) on resistance welding under different welding current processes are also investigated. The results showed that with the increase of welding current, the lap single strength (LSS) of the joints of the two systems showed a trend of first increasing and then decreasing. The LSS of the stainless steel mesh heating elements (SS-HEs) reached a maximum value of 8.76 MPa at 35.0 A. The surface of the CF/PEEK plate in the cross section of the welded joint showed a large area of non-bonding because most of the interface area did not reach the welding temperature. The LSS of carbon fiber heating elements (CF-HEs) reached a maximum value of 10.47 MPa at 15 A, and the joint strength was increased by 19.52% compared with that of SS-HEs. Debonding of the thermoplastic layer occurred on the aluminum alloy surface of the welded joint section.

Key words: 7075AA, CF/PEEK composites, heating elements, process parameters

CLC Number:

TB332

CHEN Shunxin, XU Renxin. Effect of heating elements optimization design on resistance welding of 7075 aluminum alloy and CF/PEEK[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(5): 63-68.

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