钢基体熔敷铜高频感应焊数值模拟及试验研究

发布时间：2018-03-25 00:32

本文选题：钢　切入点：铜　出处：《南京理工大学》2015年硕士论文

【摘要】：本文在感应加热基本原理的基础上,结合在铜钢异种金属焊接过程中采用的高频感应熔敷焊工艺特点,以电磁学,传热学等方面的知识和有限元法为理论基础,根据工件的尺寸以及焊接过程中与设备的相对位置,建立了铜钢高频感应熔敷焊的数学模型。利用ANSYS对铜钢感应熔敷焊过程中的温度场进行模拟,通过设定焊接时间,在其他条件相同的情况下设定不同的参数,来模拟在不同参数下的温度场,初步探讨各个参数对感应加热效果的影响,用以指导实际焊接。简要地介绍了感应加热的基本原理及存在的效应,同时介绍了电磁场的有限元数学模型和温度场的有限元数学模型以及边界条件,为ANSYS的数值分析提供了理论基础。此外还简要介绍了ANSYS软件以及一般分析流程。在其他条件相同的情况下,分别通过改变加热时间,加热电源的频率,感应器线圈的直径,工件与感应器线圈的间隙,感应器线圈的高度及感应器线圈位置,来分析上述因素对于感应加热效果的影响。通过设定焊接参数,进行实际焊接,并对实际焊接中钢基体内与铜带上端等高处一点进行温度测量,得到该点的温度循环曲线,与焊接模拟中相对应的点的循环曲线进行比较,发现误差在10%以内,且温度变化的总体趋势相同。将得到的焊接接头进行剪切试验,发现强度达到183MPa,符合要求。
[Abstract]:Based on the basic principles of induction heating and the characteristics of high-frequency induction deposition welding used in the welding of copper and steel dissimilar metals, this paper is based on the knowledge of electromagnetism, heat transfer and finite element method. According to the dimension of the workpiece and the relative position between the welding process and the equipment, the mathematical model of high frequency induction deposition welding of copper steel is established. The temperature field in the process of induction deposition welding of copper steel is simulated by ANSYS, and the welding time is set up. Under the same conditions, different parameters are set to simulate the temperature field under different parameters, and the effect of each parameter on the induction heating effect is discussed preliminarily. The basic principle and existing effects of induction heating are briefly introduced. The finite element mathematical model of electromagnetic field, the finite element mathematical model of temperature field and the boundary conditions are also introduced. It provides a theoretical basis for the numerical analysis of ANSYS. In addition, the ANSYS software and the general analysis flow are briefly introduced. Under the same conditions, the heating time, the frequency of the heating power supply, the diameter of the inductor coil are changed, respectively, by changing the heating time, the frequency of the heating power supply and the diameter of the inductor coil. The gap between the workpiece and the inductor coil, the height of the inductor coil and the position of the inductor coil are analyzed to analyze the effect of the above factors on the induction heating effect. The temperature of the steel base body and the upper end of the copper strip is measured and the temperature cycle curve of the point is obtained, which is compared with that of the corresponding point in the welding simulation. The error is found to be within 10%. And the general trend of temperature change is the same. The shear test of the welded joint will show that the strength of the welded joint is up to 183 MPA, which meets the requirements.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG457.1

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