Study On Dasylab Friction Welding Experimental Data Acquisition System Software Platform

With the exhaustion of the world’s oil and gas resources of land, development and utilization of marine resources have been significantly attention. In deep water environment, marine steel structure has fatigue crack, pits and corrosion phenomenon inevitably, caused by the nature environment, such as waves shocking, sea water corrosion. So exploration and development of resources from coastal to deep sea, for the protection of marine apparatus’ life and security, the research of deep sea structures and maintenance technology were increased. Different from the terrestrial environment, the traditional connection technology had been limited in deep water environment, friction stitch welding technology came into being in repair cracks in deep water environment, it became a new solid-phase connection technology, which is characterized from water and high-pressure environment, it had been highly attached great importance to the oil exploitation in the country. This paper is based on the "Twelfth Five Year" National863program and National Natural Science Foundation Project, and the process parameters, joint quality and other related work of friction stitch welding unit forming were studied. This paper used WBK series expansion module and WAVEBOOK/516data collector as infrastructure, supported by DASYLAB software, the test signal as the carrier, through the signal analysis and processing, using the virtual instrument technology to complete the friction stir welding process parameter synchronous acquisition, analysis and dynamic monitoring. In the different welding conditions, for the Q345steel friction stitch welding process temperature and torque testing, the change principle was analyzed, to find out the effect of heat input of friction stitch welding process on the joint quality. The process of acoustic emission technology, based on characteristic value changes of waveform in the spreading process, such as the energy of the acoustic emission source, the amplitude frequency, state change of friction stitch welding process was analyzed, reference module was established, and the joint quality was judged through the friction state.The innovation of this paper lies in:DASYLab software was designed as the core of system for the first time, the friction stitch welding dynamic data monitoring platform was established, the process parameters effect on the friction stitch welding joint quality was analyzed, the quality of the welding joint forming was predicted by dynamic monitoring. With the temperature, friction torque testing in the friction stitch welding process as the basis, for the friction stitch welding temperature field and force field simulation as the data support, to identify the welding state of the friction welding process using acoustic emission monitoring technology, in order to study the forming mechanism of friction stitch welding unit, this paper provided guidance.