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Characterization of ultrasonic metal welding Process

Journal of Environmental Science and Engineering(A) 2018年第3期7卷 125-131页

作者： Sandra Matos Fernando Veloso Carlos Santos Leonardo Goncalves Emanuel Carvalho Department of Polymers University of Minho Guimaraes 4800-058 Portugal Engineering Department Aptiv Lisbon 1600-514 Portugal Polytechnic Institute of Setubal Setubal 2910-761 Portugal Superior Institute of Engineering Lisbon 1959-007 Portugal

The ultrasonic welding process for wires is being largely used on industry mainly on applications that involve the connectionbetween similar or different metals. The biggest benefit of this technology is the possibility to perform the weld without additionmaterials, like terminals, metal rings or tapes. Manufacturing of wiring harnesses demands a significant amount of joining, such aswelding, crimping or soldering, to fulfill the desired layout of the harnesses and capacity requirements, but conventional connectionprocesses, face difficulties in joining multiple cross sections mainly due to the characteristics of the processes and equipment in *** metal welding process overcomes these issues due to the solid-state characteristics inherent to the process itself that includethe excellent electrical properties of the joint. Several researches on ultrasonic metal welding are being done to define the fundamentalmechanisms behind this process and it is being seen that they are completely dependent on the cross section to be welded. With thisresearch we are trying to develop methods for process characterization and define acceptable quality parameters in this process. Themain topics addressed in this paper are the characterization the weld formation using copper-to-copper wires using optical microscopyand the analysis of insulation material when submitted to different thermal conditions.

关键词： ultrasonic metal welding wiring harnesses insulated wires splices harness assemblies PVC (Polyvinyl Chloride)

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Microstructure and microtexture evolution of aluminum alloy 3003 under ultrasonic welding process for embedding SiC fibre

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China welding 2009年第4期18卷 6-9页

作者：朱政强 E．Ghassemieh School of Mechatronics Engineering Nanchang University Nanchang 330031 Mechanical Engineering Department the University of Sheffield Sheffieht S1 3JD UK.

ultrasonic welding process can be used for bonding metal foils which is the fundament of ultrasonic consolidation （UC）. UC process can be used to embed reinforcement fibres such as SiC fibres within an aluminum matrix materials. In this research we are investigating the phenomena occurring in the microstructure of the parts during ultrasonic welding process to obtain better understanding about how and why the process works. High-resolution electron backscatter diffraction （ EBSD ） is used to study the effects of the vibration on the evolution of microstructure in AA3003. The inverse pole figures （IPF） and the correlated misorientation angle distribution of the mentioned samples are obtained. The characteristics of the crystallographic orientation, the grain structure and the grain boundary are analyzed to find the effect of ultrasonic vibration on the microstructure and microtexture of the bond. The ultrasonic vibration will lead to exceptional refinement of grains to a micron level along the bond area and affect the crystallographic orientation. ultrasonic vibration results in a very weak texture. Plastic flow occurs in the grain after welding process and there is additional plastic flow around the fibre which leads to the fibre embedding.

关键词： electron backscatter diffraction ultrasonic metal welding AA3003

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