The invention relates to an asymmetrical laser MAG arc composite one-sided welding and double face forming technology for T joints. At present, conventional arc welding methods such as multi-layer and multi-pass MAG welding are usually used for the connection of bogies of high-speed trains. Due to the large heat input, slow speed and many passes, there are some shortcomings such as large welding deformation, difficult operation, poor forming and poor dynamic mechanical properties of joints. The invention is characterized in that: a 40 degree groove is opened under the vertical plate of the 8 mm thick carbon steel plate T-joint, and the blunt edge size of the groove is 4 mm. The asymmetric laser MAG arc composite one-sided welding double-sided forming technology is used for welding. The laser beam, arc and groove root are first adjusted by using the laser front and arc rear position distribution. On each plane, the angle between the plane and the bottom plate is 24 degrees, and at the root of the quasi-groove, the laser is perpendicular to the weld, the distance between the filaments is 4 6 mm, and the arc and the laser center are 30 degrees. The invention is used for T type joint asymmetrical laser MAG arc compound single side welding and two-sided forming technology.
【技术实现步骤摘要】
T型接头非对称激光MAG电弧复合单面焊双面成形技术
:本专利技术涉及激光-MAG电弧复合焊接加工领域,具体涉及一种T型接头非对称激光-MAG电弧复合单面焊双面成形技术。
技术介绍
:目前高速列车转向架等的连接,采用中厚板、T型接头是很多工程结构连接的常用接头形式之一,在焊接时,通常采用多层多道MAG焊等常规弧焊方式,常规弧焊由于焊接热输入大、速度慢和层道次多,存在焊接变形大、焊接工作量大、操作困难、成形较差和接头的动态力学性能差等缺点。激光焊由于具有高能量密度、焊接变形小和速度快等特点而成为一种先进的材料连接方法,常规弧焊则具有焊接熔敷量大、工艺适应性好等特点,而激光-MAG电弧复合焊则兼具了上述两种方法的优点,目前在越来越多的工程领域广泛应用,被认为是未来先进焊接发展方向之一;采用激光MAG电弧复合焊焊接中厚板、T型接头,可以实现单面焊双面成形,焊接速度快、热输入小和变形小,现有激光-MAG复合焊技术,通常选择较小的激光与底板的夹角来保证焊透质量,但在实际工况下,受激光枪和工况的限制,激光与底板夹角不能过小,传统激光-电弧复合焊接技术,激光束、电弧和焊缝中心线三 ...
【技术保护点】
1.一种T型接头非对称激光MAG电弧复合单面焊双面成形技术,其特征是:首先在8mm厚碳钢板T型接头的立板下方开40°坡口,所述的坡口钝边尺寸为4mm,采用非对称激光‑MAG电弧复合单面焊双面成形技术进行焊接,具体步骤如下:激光束与底板角度在20°‑25°范围,电弧与底板角度比激光束与底板角度大1°‑3°,激光束、电弧和焊缝中心线三者不在一个平面上,激光和电弧均偏离焊缝中心线,采用激光在前、电弧在后的位置分布,先调节激光束、电弧和坡口根部三者位于一个平面上,该平面与底板的夹角为24°,并对准坡口根部,激光垂直于焊缝,光丝间距4‑6mm,电弧与激光中心成30°;焊接时,激光垂直 ...
【技术特征摘要】
1.一种T型接头非对称激光MAG电弧复合单面焊双面成形技术,其特征是:首先在8mm厚碳钢板T型接头的立板下方开40°坡口,所述的坡口钝边尺寸为4mm,采用非对称激光-MAG电弧复合单面焊双面成形技术进行焊接,具体步骤如下:激光束与底板角度在20°-25°范围,电弧与底板角度比激光束与底板角度大1°-3°,激光束、电弧和焊缝中心线三者不在一个平面上,激光和电弧均偏离焊缝中心线,采用激光在前、电弧在后的位置分布,先调节激光束、电弧和坡口根部三者位于一个平面上,该平面与底板的夹角为24°,并对准坡口根部,激光垂直于焊缝,光丝间距4-6mm,电弧与激光中心成30°;焊接时,激光垂直向上偏离坡口根部0-1mm的位置,激光大部分进入坡口并照射在立板上,使得80%左右激光能量用于立板熔化并形成匙孔,更好地焊透立板,10%激光照射在底板,保证底板的熔合,还有10%激光未进入坡口而落在了立板表面,这10%激光能量保证正面焊缝的上表面的成形;与此同时,电弧垂直向下偏离坡口根部1...
【专利技术属性】
技术研发人员:李小宇,周军,孙谦,黄瑞生,张春波,杨义成,
申请(专利权)人:哈尔滨焊接研究院有限公司,
类型:发明
国别省市:黑龙江,23
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