工艺参数对焊接质量影响的数值模拟及焊接数据库系统的开发

发布时间：2018-05-31 14:07

本文选题：焊接数值模拟 + 温度场　；参考：《郑州大学》2017年硕士论文

【摘要】：随着工业技术快速发展,焊接在汽车、船舶、电力及航空航天等领域的应用越来越广泛。在实际生产过程中,由于工作环境和焊接成本对焊接件结构会产生一定影响,使得焊接工艺很难通过实际实验进行验证,利用有限元软件进行焊接件分析,可以得到比较好的焊接方案。焊接工艺的制定过程受到很多因素的影响,目前很多学者对焊接工艺参数对焊接件温度场、应力场和焊接变形等进行了分析与研究,但是并没有完善的体系将其他学者已经做的焊接模拟分析结果进行总结和归纳。本文利用ANSYS、Simufact.Welding等有限元软件对X型对称及非对称坡口结构件进行分析。通过对不同因素情况下焊接件温度场、残余应力及焊接变形的讨论与分析,得出相关结论。同时还建立了焊接参数及焊接结果查询系统;具体研究内容如下:(1)利用ANSYS有限元分析软件分析了焊接预热温度、焊接速度、焊接件的约束方式及焊接热输入对典型焊接结构的影响。(2)利用Simufact.Welding有限元软件分析了焊接顺序对X型对称坡口结构件的影响。(3)对焊接取样点的温度循环曲线进行分析。对焊接及焊件冷却过程中的应力和变形进行分析,主要分析了沿着焊接路径方向和垂直焊接路径方向的应力变化。(4)收集并整理制定焊接工艺所需要的文件;并基于SQL Server数据库,利用C#编程完成对焊接参数和结果查询软件的开发。(5)建立焊接参数和结果查询系统,主要包括对焊接参数的查询、修改以及对焊接结构的查询和添加;管理员通过对各焊接模块实施增加、查询、修改和删除操作来完成对数据库的管理,操作简单且安全可靠。本课题为后续进一步研究焊接参数对焊接件的影响以及制定合理的焊接工艺提供了参考和依据。
[Abstract]:With the rapid development of industrial technology, welding is more and more widely used in automobile, ship, power, aerospace and other fields. In the actual production process, because of the influence of working environment and welding cost on the structure of welding parts, it is difficult to verify the welding process through actual experiments. The finite element software is used to analyze the welding parts. A better welding scheme can be obtained. The process of making welding process is affected by many factors. At present, many scholars have analyzed and studied the welding process parameters on the temperature field, stress field and welding deformation of welding parts. However, there is no perfect system to summarize and summarize the results of welding simulation analysis done by other scholars. In this paper, the finite element software ANSYS Simufact.Welding is used to analyze the X type symmetrical and asymmetric groove structures. Through the discussion and analysis of temperature field, residual stress and welding deformation of welding parts under different factors, the relevant conclusions are obtained. At the same time, the inquiry system of welding parameters and welding results is established. The specific research contents are as follows: 1) the welding preheating temperature and welding speed are analyzed by using ANSYS finite element analysis software. (2) the influence of welding sequence on X type symmetrical groove structure is analyzed by Simufact.Welding finite element software. 3) the temperature cycle curve of welding sampling point is analyzed. The stress and deformation in welding and welding parts cooling process are analyzed. The stress variation along welding path direction and vertical welding path direction is analyzed. Using C # programming to complete the development of welding parameters and results query software. (5) to establish the welding parameters and results query system, mainly including the welding parameters query, modification and welding structure query and addition; The administrator manages the database by adding, querying, modifying and deleting each welding module, which is simple, safe and reliable. This paper provides a reference and basis for the further study of the influence of welding parameters on welding parts and the formulation of reasonable welding process.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP311.13;TG44

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