薄壁构件机器人等离子焊接工艺试验研究
摘要本文选用3mm碳钢板，应用机器人等离子熔透焊接方法进行了堆焊试验，并且设计了两种T形接头形式，分别进行了工艺试验研究，对所获得的焊缝进行了宏观观察，测量其熔宽和焊接变形等参数。试验结果表明：当焊接电流为173A，离子气流量为1L/min，焊接速度为25cm/min，保护气体为17L/min时，能得到成形较好的型式A接头。当第一道焊焊接电流为120A，第二道焊焊接电流为112A，流量1L/min，保护气体为17L/min，焊接速度为30cm/min时能得到成形较好的型式B接头。电流、离子气流量和焊接速度三者存在匹配关系. 型式A接头对变形的敏感性要大于型式B接头。但是在该规范下得到的T形接头存在未焊透缺陷。68185
毕业论文关键词 碳钢板 机器人 等离子 焊接变形
毕业设计说明书（论文）外文摘要
Title Research of thin-walled structure steel plate robotic plasma welding system
Abstract
3mm steel plate is the object studied in this paper. Robots plasma welding was adopted for the surfacing. Two forms of T-shape connector were designed to take experimental research process, respectively. The weld appearance was inspected and sampled for its penetration, weld width and other weld parameters. Welding deformations of two forms of T-joint were measured. The results show that, When the welding current is 173 A, the rate of plasma gas flow is 1 L/min, the welding speed is 25cm/min, the shield gas is 17L/min, and a better molded Butted Seam T shaped connector can be obtained. When the first pass welding current is 120 A, the second pass welding current is 112 A, the rate of plasma gas flow is 1L/min, the shield gas is 17 L/min, the welding speed is 30 cm/min , two better docking seam T shaped joints can be obtained. In order to get a good forming welding ，a certain size of Current, a certain size of plasma gas flow rate and welding speed are required .On the sensitivity of welding deformation, a Butted Seam T shaped connector is better than a docking seam T shaped joints. However, in this specification，the obtained T-joint is insecure, lacked of penetration defects.
Keywords Carbon steel plate robot plasma welding deformation
目录
1 引言 1
1.1选题背景及意义 1
1.2 焊接残余变形 1
1.3 等离子焊接焊缝质量的影响因素 2
1.3.1 等离子弧焊的主要工艺参数 2
1.3.2 焊接参数的影响 2
1.4 焊接残余变形及机器人焊接的研究现状 3
1.4.1 焊接残余变形的研究现状 3
1.4.2 机器人等离子焊接的研究现状 4
1.5 本课题研究内容 6
2 试验设备 7
3 机器人等离子堆焊焊接工艺研究 7
3.1 焊接规范 7
3.2 焊前清理 8
3.3 焊缝外观成形及试验结果分析 8
4 碳钢薄板低变形薄板接头结构设计与试验 14
4.1 低变形薄板接头结构设计