焊接的概念　　焊接是指通过适当的物理化学过程使两个分离的固态物体产生原子(分子)间结合力而连接成一体的连接方法。金属连接在现代工业中具有很重要的实际意义，因此，狭义上讲，焊接通常就是指金属的焊接。早期的焊接　　从前，由于没有电源，对于金属的连接，都是采用锻 Welding Concept Welding refers to the connection of an integrated bonding process between two separate solid objects through the proper physico-chemical process to create binding forces between atoms (molecules). Metallic connection has very important practical significance in the modern industry, therefore, narrowly speaking, the welding usually refers to the metal welding. Early welding in the past, because there is no power, for the metal connection, are used forging