自保护药芯焊丝熔化速度模型及其影响因素

Melting rate model of self-shielded flux-cored wire and its influence factors

焊丝熔化速度与送进速度的合理匹配是保征焊接过程稳定和获得良好焊缝成形质量的基础。在焊接过程稳定的条件下,通过采集电弧电压、焊接电流、焊丝伸出长度等工艺信息,定量分析和研究了焊丝伸出长度和焊接电流对自保护药芯焊丝熔化速度的影响规律,同时求出了焊丝熔化速度模型系数。研究结果为采用自保护药芯焊丝的钢轨窄间隙电弧焊的工艺规范制定和参数匹配提供了理论指导和依据。

Reasonable match of wire melting rate and feeding rate is the basis to guarantee welding process stability and obtain good weld appearance quality.Under the condition of stable welding process,the process information such as arc voltage,welding current and wire extension were collected.Then,the quantitative analysis and research were carried out on the influence law of wire extension and welding current on the melting rate of self-shielded flux-cored wire,and the coefficient of the melting rate model was calculated.The research results provide theoretical guidance and basis to determine the process parameters and parameters match in the narrow gap arc welding of steel rail with self-shielded flux-cored wire.