- 期刊
- OpenAccess
銲接參數對氣體金屬電弧銲接特性之研究
Study of Welding Parameters on Gas Metal Arc Welding
摘要
就銲接的目的而言，正確的銲接參數組合及適當的遮護氣體比例才能使母材獲得良好的機械性質及銲道強度，提高銲接效率與品質。本研究探討氣體金屬電弧銲接以200A銲接電流及28V電壓組合，改變不同比例之遮護氣體、銲接速度、銲鎗角度及銲鎗距離母材之高度作為探討銲接參數對銲道幾何形狀和銲道外觀之影響。試驗結果顯示：銲接電壓及電流增加，皆會使銲道寬度及稀釋率增加，在不同銲接電流及電壓搭配下，其銲道寬度增加的斜率亦無明顯變化及差異。在改變遮護氣體之比例試驗中發現，CO2百分比增加，銲道的冠高和熔深皆呈增加之趨勢，銲道寬度則減少，導致稀釋率增加，但銲接時噴濺係數增加。在改變銲鎗角度的試驗中，發現銲鎗前傾角度增加，銲道寬度也會隨之增加，冠高及熔深則會減少且噴濺係數會增加，銲鎗後傾則會形成相反之結果。在改變銲線噴嘴至母材距離試驗中發現，銲線噴嘴至母材距離增加，銲道寬度也會增加，冠高及熔深則會減少，且噴濺係數亦增加。在改變銲接速度試驗中發現，銲接速度增加，銲道寬度、冠高及熔深減少，導致稀釋率亦減少。
並列摘要
To gain fine mechanical property and bead strength to raise welding efficiency and quality, only applicative welding parameters and shielding gas rate could attach to the target. In this research of gas metal arc welding under 200A and 28V was used. Various welding parameter as shielding gas, welding speeds, welding gun angles and distances between welding nozzle and the targets, the results shown on the analyses indicated that they would bring what effects of bead geometric shape and bead appearance. The experimental results showed that: when welding voltages and currents raise, they would make bead width and dilution rate increase as well. With various voltages and currents, the slope didn't change apparently. As the CO2 percent increases, the variation of shielding gas is proportional to the increases of bead reinforcement and penetration. However, the dilution rate and spatter loss coefficient would increase as the bead width decrease. In different welding gun angles, the welding width increases when the force angle grows. Decreasing the reinforcement and penetration at the same time would increase the spatter loss coefficient. If the welding gun extroverts, the result would behave oppositely. As the distance was increased, the bead width would be enlarged, reinforcement and penetration would be decreased, and the spatter loss coefficient would be increased. The increases of welding speed would result in the decreases of bead width, reinforcement, and penetration. This would dive down made the dilution rate.