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一般高质焊接接头必须有合适的焊缝尺寸和形态,这就要求选择好焊接工艺参数。为此用因子设计法建立数学模型对GMAW焊接工艺参数影响焊道几何尺寸灵敏度进行研究分析。研究采用了GMAW焊接机器人。焊接工艺参数选择了独立的三因子:焊接电流、电弧电压和焊接速度。焊道几何尺寸主要监测焊道宽度、高度和深度。分析比较了3个焊接工艺参数对焊道几何尺寸的影响规律。试验研究表明,所建立的数学模型能对给定的焊道几何尺寸所要求的工艺参数进行估算,指出焊接工艺参数变化对焊道宽度和高度的影响比深度更大。
General high-quality welded joints must have a suitable size and shape of the weld, which requires the choice of welding process parameters. To this end, a mathematical model was established by factorial design method to study and analyze the influence of welding parameters of GMAW on the weld geometry sensitivity. The study used a GMAW welding robot. Soldering process parameters selected independent three factors: welding current, arc voltage and welding speed. Weld geometry mainly monitors bead width, height and depth. The influence of three welding parameters on the weld geometry was analyzed and compared. Experimental studies have shown that the mathematical model established can estimate the process parameters required for a given weld bead geometry, noting that changes in welding process parameters have a greater effect on weld bead width and height than depth.