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在变压器、电磁铁等电磁转换器件的制造中,其绕组铁心的紧固通常系采用螺柱连接或铆钉铆压等方法。这些传统工艺的弊病在于铁心冲模制造复杂,工序繁多,加之铁心通孔位于磁轭中心,冲片叠压松紧不均,使铁心磁路受阻,从而产生涡流、漏磁和噪声,以致铁心易发热,使用寿命短,工作不可靠、为了有效地改善上述不良状况,对BK型控制变压器铁心和PYZ型镇流器铁心的紧固,我们曾采用钨极氩弧焊方法,效果较好。在此基础上,为了进一步降低成本,提高效率,确保质量,我们又根据材料的焊接特性和要求,对ZXG—300型焊机、AB—500型焊机的主电源电路、焊接电流控制器、高频引弧电路作了改进(本文以ZXG—300型为例作重点介绍),并将钨极氩弧焊改为钨极Ar+H_2混合气体保护焊。结果证明,改进合理,效果更佳。
In the manufacture of transformers, electromagnets and other electromagnetic conversion devices, the winding core is usually fastened with studs or rivets. The disadvantages of these traditional processes are that the core dies are complicated to manufacture and have many processes. In addition, the through holes of the core are located in the center of the yoke, and the uneven lamination of the punch sheets causes the magnetic circuit of the core to be hindered, resulting in eddy currents, magnetic flux leakage and noise, , Short service life, work is not reliable, in order to effectively improve the above-mentioned undesirable conditions, the BK-type control transformer core and PYZ-type ballast core fastening, we have used the TIG welding method, the effect is better. On this basis, in order to further reduce costs, improve efficiency and ensure quality, we also according to the welding characteristics and requirements of the material, the ZXG-300 welder, AB-500-type welder’s main power circuit, welding current controller, High-frequency arc ignition circuit has been improved (ZXG-300 in this paper, for example, as an emphasis), and the tungsten argon arc welding to tungsten Ar + H_2 mixed gas shielded welding. The results show that the improvement is reasonable and the effect is better.