管道工厂化预制及混合气体保护自动焊的应用研究

发布时间：2018-01-16 04:21

本文关键词：管道工厂化预制及混合气体保护自动焊的应用研究　出处：《西安石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：当代石油化工行业的迅速发展,工艺管道安装的集成化、大型化已成为管道安装的主要趋势。为了满足工程的工期要求、保证工程施工质量,我单位在靖边能源工业园建立了三个管道预制厂,并积极革新推广Ar/CO2混合气体保护焊工艺,对工艺管道预制、安装质量的提高、工期的缩短都具有积极的意义。在本文中,通过对靖边能化项目现场实物量的估算,以及管道施工工期的考虑,我公司对管道预制工作站进行了规划。通过大量的数据估算与分析,设计了一套适应现场高效率、快节奏的施工程序。同时选取了管道预制自动焊机,其最大特点是焊枪位置不变、工件转动,在焊接过程中一直保持平焊,有效地保证焊接质量。通过试验研究及数据分析发现,保护气体的合理选择对预防焊接飞溅具有重要作用。当混合气体中CO2的含量超过20%时,焊接过程中的飞溅率会突然增加,而在CO2气体中加入Ar气体可以明显减少飞溅的形成。为提高焊接质量,对焊接工艺作了优化。通过实验及理论分析,我们确定了一般碳钢焊接时,焊丝一般选用H08Mn2Si A、直径Φ1.6mm,伸出长度在16~20mm,焊接电流为200A~220A,焊接电压为21~23V,焊接速度视情况而定。以上理论分析与实验研究,为管道工厂化预制与混合气体保护焊的结合应用提供依据。
[Abstract]:With the rapid development of the contemporary petrochemical industry, the integration of process pipeline installation and large-scale pipeline installation has become the main trend of pipeline installation. My unit has established three pipeline prefabrication plants in Jingbian Energy Industrial Park, and actively innovated and popularized the Ar/CO2 mixed gas shielded welding process to improve the prefabrication and installation quality of the process pipeline. The shortening of the construction period is of positive significance. In this paper, through the estimation of the site physical quantity of Jingbian energy project, as well as the consideration of the pipeline construction period. My company has carried on the plan to the pipeline precast workstation. Through the massive data estimation and the analysis, has designed a suit of high efficiency, the fast rhythm construction procedure, and has selected the pipeline prefabrication automatic welding machine. Its biggest characteristic is that the position of welding torch is invariable, the workpiece is rotated, and the welding quality is effectively guaranteed by the flat welding in the process of welding, which is found by experimental research and data analysis. Reasonable selection of protective gas plays an important role in the prevention of welding spatter. When the content of CO2 in the mixed gas exceeds 20 kb, the spatter rate in the welding process will suddenly increase. In order to improve the welding quality, the welding process was optimized. Through the experimental and theoretical analysis, we determined the welding time of the general carbon steel. The wire is usually H08Mn2SiA, diameter 桅 1.6mm, extension length is 16m 20mm, welding current is 200An 220A, welding voltage is 213V. The above theoretical analysis and experimental study provide the basis for the combination application of pipe factory prefabrication and mixed gas shielded welding.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ055.81;TG444.72

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