Since automation technology has been popularized to the welding field, there are two common welding systems, welding robot and welding machine. Although they are special mechanical equipment, there must be some differences. So the following will be welding robot and welding machine for comparison.

从方面来说，焊接专机要比焊接机器人更有优势，但大多数的厂家还是会选择焊接机器人，因为焊接专机是针对某种特定的产品而研制出的自动化设备，多采用伺服X、Y、Z轴三个方，一般只是焊接圆形或是焊接直焊缝。

In terms of price, the special welding machine has more advantages than the welding robot, but most manufacturers will choose the welding robot, because the special welding machine is an automatic equipment developed for a specific product, which mostly uses servo x, y and Z axes, generally only welding round or straight welds.

而焊接机器人就不一样了，它采用6个伺服控制，非常灵活，可以三维立体任何方向不规则的焊接，所以相对高一些。不过焊接专机可以配4到5个焊头，效率比焊接机器人还要高。

The welding robot is not the same, it uses six servo control, very flexible, can three-dimensional irregular welding in any direction, so the price is relatively higher. However, the welding machine can be equipped with 4 to 5 welding heads, which is more efficient than the welding robot.

由此可见，若是平面上的直缝、圆缝的话要选择焊接专机，但只要旦焊接产品变了规格或变了形状，那焊接专机就无用武之地了。而焊接机器人正好弥补了这方面的不足，这种情况下只需要重新编个程序又可以再次使用了。

It can be seen that the welding machine should be selected for the straight and round seams on the plane, but as long as the welding product changes its specification or shape, the welding machine will be useless. The welding robot just makes up for this deficiency. In this case, it only needs to reprogram and can be used again.

随着焊接机器人应用范围的扩大，焊接机器人除了基本的配置外，有时候还会增加一个或多个外部轴。也就是说，外部轴其实就是一个跟焊接机器人相连的外部动作系统，来配合机器人的动作，能够同时满足焊接姿势，也能更快速的完成整个焊接，达到满意的效果。

With the expansion of welding robot application, in addition to the basic configuration, welding robot sometimes adds one or more external axes. In other words, the external axis is actually an external action system connected with the welding robot, to cooperate with the robot's action, can meet the welding posture at the same time, and can also complete the whole welding more quickly, to achieve satisfactory results.