Birtha Janos, Marschik Christian, Kobler Eva, Straka Klaus, Steinbichler Georg, Schlecht Sven, Zwicklhuber Paul
Institute of Polymer Injection Moulding and Process Automation, Johannes Kepler University Linz, Altenbergerstraße 69, 4040 Linz, Austria.
Competence Center CHASE GmbH, Altenbergerstraße 69, 4040 Linz, Austria.
Polymers (Basel). 2023 May 4;15(9):2182. doi: 10.3390/polym15092182.
The aim of this work was to optimize spot welding of unidirectional tapes made of polycarbonate and carbon fibers. Three studies were performed to investigate the influences of various welding conditions on the quality of the welded spot. First, we used a full factorial experimental design to analyze the influence of temperature and time on the welds' tensile stress at break. Second, we repeated the experiment with optimized settings and conditions. Finally, we adopted a central composite design (CCD) to investigate the stability of the process. Our results show that temperature had the greatest influence on weld quality. The maximum tensile stress achieved was 23 MPa. Using a relatively high temperature for a short welding time resulted in self-cleaning of the welding head and in a faster and more stable process, and gel permeation chromatography (GPC) confirmed that these conditions caused no additional degradation.
这项工作的目的是优化由聚碳酸酯和碳纤维制成的单向带的点焊。进行了三项研究以调查各种焊接条件对焊点质量的影响。首先,我们使用全因子实验设计来分析温度和时间对焊缝断裂拉伸应力的影响。其次,我们在优化的设置和条件下重复了实验。最后,我们采用中心复合设计(CCD)来研究该过程的稳定性。我们的结果表明,温度对焊接质量影响最大。达到的最大拉伸应力为23兆帕。在较短的焊接时间内使用相对较高的温度会导致焊头自清洁,并使过程更快、更稳定,凝胶渗透色谱法(GPC)证实这些条件不会导致额外的降解。