本发明提供一种自带钎剂螺旋态复合钎料饼及其制备方法，钎料饼中的钎料为窄带状钎料，所述窄带状钎料的横截面为扁鼓形，窄带状钎料之间的间隙小于0.1mm，钎料间隙处粘附有钎剂膏；制备方法为：一、制备钎剂膏；二、将钎料丝轧制成窄带状钎料，并将窄带状钎料的一端固定于卷绕装置的绕制芯轴；三、拉伸装置中的第一拉伸辊和第二拉伸辊给窄带状钎料施加张力；四、启动加热装置和卷绕装置；五、绕制芯轴带动窄带状钎料旋转；六、切刀将窄带钎料切断，即制成螺旋态钎料饼；七、螺旋态钎料饼浸入钎剂箱，取出后烘干。该发明生产工艺简单，易于批量化生产，材料利用率高，制备的钎料饼在使用过程中不用另加钎剂，提高焊接的生产效率。

The invention provides a soldering flux-embedded spiral state composite brazing flux cake and a preparation method thereof. The brazing fluxes in the soldering flux-embedded spiral state composite brazing flux cake is in the shape of narrow strip, the cross section of the narrow strip-shaped brazing fluxes is in the shape of flat drum, the gap among the narrow strip-shaped brazing fluxes is smaller than 0.1 mm, and soldering flux is attached in the gaps of the narrow strip-shaped brazing fluxes. The preparation method of the soldering flux-embedded spiral state composite brazing flux cake comprises, firstly, preparing the soldering flux; secondly, rolling brazing flux wires into the narrow strip-shaped brazing fluxes, and fixing one ends of the narrow strip-shaped brazing fluxes onto the winding spindle of a winding device; thirdly, exerting tension onto the narrow strip-shaped brazing fluxes through a first tension roller and a second tension roller of a tension device; fourthly, starting a heating device and the winding device; fifthly, driving the narrow strip-shaped brazing fluxes to rotate through the winding spindle; sixthly, cutting off the narrow strip-shaped brazing fluxesthrough a cutter to obtain the spiral state composite brazing flux cake; seventhly, immersing the spiral state composite brazing flux cake into a soldering flux tank, and extracting and drying the immersed spiral state composite brazing flux cake. The preparation method of the soldering flux-embedded spiral state composite brazing flux cake is simple in production process, applicable to batch production and high in material utilization rate; the prepared soldering flux-embedded spiral state composite brazing flux cake saves additional soldering flux during application and improve the weldingproduction efficiency.