空气—乙炔混合气体火焰是一种比较理想的软钎焊热源,原理:乙炔气为可燃气体,利用空气中21%游离状态的氧气作为助燃气体,形成空气—乙炔火焰来实现软钎焊工艺;燃烧火焰温度大约1200℃左右,焰心呈蓝色,不太明亮,但轮廓清楚,无残余碳核。结构:用射吸式焊炬加以改装即可;可配备自制空心烙铜进行软钎焊,也可换上喷灯头代替汽油喷灯使 Air - acetylene gas mixture flame is an ideal soldering heat source, the principle: acetylene gas is a combustible gas, the use of air in the free state of 21% oxygen as a combustion gas to form air - acetylene flame to achieve the soldering process; Burning flame temperature of about 1200 ℃, the flame is blue heart, not too bright, but the outline is clear, no residual carbon. Structure: with jet welding torch to be modified; can be equipped with self-made hollow copper brazing, can also be replaced on the burner instead of gasoline torch