Induction-based joining of titanium with thermoplastics
Induction-based joining of titanium with thermoplastics
复制标题
钛与热塑性塑料的感应连接
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
M. Zaeh
中科院分区：
文献类型：
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作者：
F. Lugauer;A. Kandler;S. Meyer;C. Wunderling;M. Zaeh
混合复合材料的重要性正在增加，特别是在结构轻量化方面。因此，本文研究了一种利用感应技术生产杂化键的连接工艺。为此，开发、组装、调试和表征了一个合适的试验台。利用该装置对Ti6Al4V钛合金进行了加热试验，确定了工艺参数对温度水平和温度场的影响。这尤其适用于进给速率、样品几何形状、样品和电感之间的相对定位以及电感设置，如感应频率和脉宽调制。基于这些测试结果，开发了一种两阶段加热工艺，该工艺允许在所用聚合物（PPS; Ten-Cate Cetex TC1100）的熔化和降解温度范围内形成均匀的温度场，从而达到优化的粘合强度。更具体地说，采用高能量输入的短阶段快速强化升温，采用较长时间实现温度均匀分布。随后，根据DIN EN 1465（胶粘剂-粘合组件的拉伸搭接剪切强度测定；德文版本EN 1465:2009, 2009），用CFRP制作适合拉伸剪切试验的试件几何形状的接头。拉伸剪切强度和断裂面分析表明，由于塑性的熔化焓，金属比初步试验表明的更难以加热。进行了进一步的测试，发现了加热的阈值，当温度足够高时，可以实现在金属上完全覆盖塑料。总之，研究表明，所提出的方法以及试验台的设计一般适用于金属与热塑性聚合物的粘合。可以确定各参数对加热和粘结强度的影响。此外，还建立了一种工艺，可以产生工业上有用的结合力。这不仅证明了进一步的研究是有用的，而且为进一步的实验奠定了基础。
The importance of hybrid composites is increasing, particularly with regard to structural lightweight construction. Therefore, a joining process for the production of hybrid bonds using induction technology is examined in this paper. An appropriate test rig was developed, assembled, commissioned and characterized for this purpose. Heating tests with titanium Ti6Al4V were carried out with this device to determine the influence of the process parameters on the temperature level and the temperature field. This applies in particular to the feed rate, the sample geometry, the relative positioning between sample and inductor as well as to the inductor setting like induction frequency and pulse width modulation. Based on the results of these examinations, a two-stage heating process was developed, which allows the formation of a homogeneous temperature field in the range of the melting and degradation temperature of the used polymer (PPS; Ten-Cate Cetex TC1100) and thus to achieve optimized bond strengths. More specifically, a short phase with a high energy input was used for quick and intensive warming and a longer time period was deployed to reach an even distribution of temperature. Subsequently, joints with CFRP were produced with a specimen geometry suitable for tensile shear tests according to DIN EN 1465 (Adhesives—determination of tensile lap-shear strength of bonded assemblies; German version EN 1465:2009, 2009). The analysis of the tensile shear strength and the fractured surfaces shows that the metal is much more difficult to heat up due to the melting enthalpy of the plastic than preliminary tests indicated. Further tests were carried out, which revealed a threshold value for heating where the temperature was sufficiently high to achieve a complete coating of the plastic on the metal can be achieved. In summary, the investigations showed that the presented method as well as the design of the test rig is generally suitable for bonding metal to thermoplastic polymers. The influence of various parameters on heating and bond strength could be identified. Moreover a process has been established, which allows industrially useful bonding forces. This not only proves that further investigations are useful, but also laid the foundation for further experiments.