School of Material Science and Engineering, Hunan Provincial Engineering Research Center of Forming Technology and Damage ResistanceEvaluation for High Efficiency Light Alloy Components, Hunan University of Science and Technology
Hunan Provincial Key Defense Laboratory of High Temperature Wear-resisting Materials and Preparation Technology
Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion

研究了无导能筋碳纤维增强尼龙66复合材料的超声波焊接过程,并分析了板材与焊头之间角度及上下板材间的间隙对焊接过程的影响.结果表明:超声波焊接由库伦摩擦、非稳态熔化、稳态熔化和凝固4个阶段构成.适当提高焊接压力和焊接时间可以增加稳态熔化阶段时间,而当焊接时间超过2.9s,会出现上板塌陷的T3'阶段.当角度大于4°或板间隙大于1.0mm时,由于界面I和界面II的接触不再紧密而出现接头强度的快速下降.存在角度的接头在位移曲线上表现为多个“平台”特征,而板间隙的接头减少了稳态熔化阶段的时间.

Ultrasonic welding of carbon fiber reinforced Nylon 66 without energy director is investigated and theeffect of horn incline and gap between workpieces are analyzed. Experimental results show that the ultrasonicprocess consists coulomb friction, unsteady melting, equilibrium of material melting and outflow, and coolingdown phases. Properly increasing weld pressure and time can prolong the equilibrium phase, whereas a collapsephase of T3' occurrs with weld time exceeding 2.9 s. With the horn incline above 4° or gap between workpieceexceeds 1. 0 mm, the joint strength decreases significantly due to the loose contact at interfaces I and II.Comparing with the normal joint, the displacement curve for joint with horn incline displays multi-platformcharacteristic and the duration of equilibrium phase decreases for that of gap between workpieces.

国家自然科学基金资助项目(51905167);湖南省自然科学基金资助项目(2024JJ4019)

支倩,胡宇航,谭欣荣,等.无导能筋碳纤维增强尼龙66复合材料超声波焊接过程及影响因素[J].湖南科技大学学报(自然科学版),2024,39(3):78-84.

ZHI Q, HU Y H, TAN X R, et al. Analysis of the Process and Influential Parameters of Ultrasonic Welding of Carbon FiberReinforced Nylon 66 Without Energy Director[ J] . Journal of Hunan University of Science and Technology ( Natural Science Edition), 2024, 39( 3) : 78-84.