在物理教学和第二课堂活动中,经常要用电烙铁进行焊接。而焊接的好坏,会直接影响到我们的教学效果,所以我们有必要掌握一些焊接技术。一、电烙铁烙铁是焊接的主要工具。一般常用的电烙铁分内热式、外热式两种。内热式电烙铁是近几年产品,它具有热效率高、体积小、使用方便等优点。缺点是功率不宜做得太大,使用寿命较短。一般常见的有15W、20W、30W、35W、 In physics teaching and the second classroom activities, often use soldering iron for welding. The quality of welding, will have a direct impact on our teaching effectiveness, so we need to master some of the welding technology. First, the iron soldering iron is the main tool for welding. Commonly used electric iron sub-heat, external heat two. Thermal iron is the product in recent years, it has high thermal efficiency, small size, easy to use and so on. The disadvantage is that power should not be done too much, the service life is short. Common are 15W, 20W, 30W, 35W,