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激光胶接点焊是一种结合激光点焊与胶接技术的新型高效连接工艺，在工业制造领域得到广泛应用。选取DP440、DP460和DP590 3种环氧树脂胶黏剂，采用SL-1GXY-500W光纤激光器对SUS301L不锈钢板进行激光点焊和激光胶接点焊，系统分析接头的力学性能与断口形貌。结果表明：胶层的引入显著增大了胶焊接头的承载面积，缓解了焊点边缘的应力集中现象，使胶焊接头的抗拉强度优于传统的点焊接头；同时，胶层可增加焊点熔深，进一步提升连接件的失效载荷。提出一种异种材料激光胶接点焊接头的数值模拟方法，采用不同接触刚度的黏接单元构建有限元模型并与试验结果进行对比，结果显示：焊点附近各测点应力仿真值与试验值误差均<18%，接头两侧区域各测点应力仿真值与试验值误差均<10%。研究结果可为工程应用中激光胶接点焊工艺的环氧树脂胶黏剂选型与接头力学性能数值模拟提供技术参考。
Abstract：Laser adhesive spot welding is a new and efficient connection process that combines laser spot welding and adhesive bonding technology, and has been widely applied in industrial manufacturing. Three types of epoxy resin adhesives, namely DP440, DP460 and DP590, were selected to conduct laser spot welding and laser adhesive spot welding on SUS301L stainless steel plates using a SL-1 GXY-500W fiber laser. The mechanical properties and fracture morphology of the joints were systematically analyzed. The results show that the introduction of the adhesive layer significantly increases the effective load transfer area of the adhesive welded joint, alleviates the stress concentration at the edge of the weld spot, and makes the tensile strength of the adhesive welded joint superior to that of the traditional spot welded joint. Meanwhile, the adhesive layer can increase the weld penetration depth, further enhancing the failure load of the connected parts. A numerical simulation method for laser adhesive spot welded joints of dissimilar materials was proposed. A finite element model was constructed using adhesive elements with different contact stiffness and compared with the experimental results. The results show that the error between the simulated and experimental values of the stress at each measurement point near the weld spot is less than 18%, and the error between the simulated and experimental values of the stress at each measurement point in the two sides of the joint is less than 10%. The research results can provide technical references for the selection of epoxy resin adhesives and the numerical simulation of the mechanical properties of the joints in the engineering application of laser adhesive spot welding.
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基本信息:
DOI：10.13291/j.cnki.djdxac.2026.04.014
中图分类号:TG407
引用信息:
[1]李晓峰,李延洋,张岱霖.异种激光胶接点焊接头力学性能及断口形貌分析[J].大连交通大学学报().DOI:10.13291/j.cnki.djdxac.2026.04.014.
2026-08-17
2026-08-17
2026-08-17