01 Overview of assembled steel structure nodes China has promoted the development of assembled buildings in recent years, and the assembled connection nodes of square steel tube columns and beams have gradually become a research hotspot because of their high efficiency and environmental advantages. Assembled steel structure is different from traditional building structure, it is prefabricated in the factory.

First of all, to just come in the friend to introduce the introduction of argon arc welding, two bonded welding, plasma welding, laser welding, the working principle of each and its advantages. Convenient to learn or to enter the processing industry bosses to choose. Argon arc welding argon arc welding arc using high-pressure breakdown of the arc starting method

With the continuous progress of science and technology, CNC machining on the complexity of parts, precision and process and other aspects of the more stringent requirements, relying solely on manual programming has been difficult to meet these needs. Because of this, CAM (computer-aided manufacturing) software was born and gradually popularised.