毫米波波导天线内腔钎焊质量控制工艺

Study on control technology of inner cavity brazing quality for millimeter waveguide antenna

针对毫米波波导天线内腔钎焊质量的控制工艺进行了研究,开展了电气性能仿真、图像处理分析、超声C-扫描检测分析及金相分析,掌握了钎焊工艺参数对内腔质量的影响规律。研究表明,未焊透缺陷与波导位置有关,钎焊压力、钎料厚度是影响内腔质量的重要因素。在钎焊压力较小时,无钎料漫溢情况,但容易出现未焊透缺陷。当压力较大时,波导周边焊透率达到100%,但容易出现钎料漫溢现象。钎料厚度减薄,能够有效减少钎角处的钎料堆积和钎缝处的未焊透。为得到高精度内腔质量的毫米波波导天线,建议采用较大压力、较薄的钎料进行钎焊。

The control technology of inner cavity brazing quality was studied for the millimeter wave guide antenna. A variety of analysis methods were carried out,such as electrical performance simulation,image processing analysis,ultrasonic C-scan detection analysis,metallographic analysis and so on. The influence of brazing parameters on the cavity quality was grasped. The results show that the imperfection defect was related to the position of the waveguide,and the brazing pressure and the thickness of the brazing filler metal are the important influencing factors on the cavity quality. When the brazing pressure was low,there is no solder overflow situation,but prone to no penetration defects.When the pressure was high,the waveguide around the permeability is 100%,but prone to solder overflow phenomenon. The thickness of the brazing material can be reduced,and the solder accumulation at the corner of the brazing and the penetration of the brazed seam can be effectively reduced. In order to obtain high-precision cavity-quality millimeter waveguide antenna,a higher pressure,thinner brazing filler metal are recommended to apply.