High-frequency welding originated in 1950s. It uses the skin effect and proximity effect produced by high-frequency current to weld steel plates and other metal materials. A new welding technology for butt welding of materials. The emergence and maturity of high-frequency welding technology has directly promoted the great development of the straight welded pipe industry, which is straight Key process of seam welded pipe (ERW) production. The quality of high-frequency welding directly affects the overall strength, quality grade and health of welded pipe products, production speed.
As a welded pipe manufacturer, we must have a deep understanding of the basic principles of high frequency welding. Understand the structure and working principle of high frequency welding equipment; watch from a height or distance Key points of high frequency welding quality control. Here's an introduction for you.
Firstly, it is the basic principle of high frequency welding.
"High frequency" refers to the frequency of AC current of 50Hz, and generally refers to the high frequency current of 50 kHz to 400 kHz. High frequency electricity When flowing through a metal conductor, there will be two peculiar effects: skin effect and proximity effect, which are used in high frequency welding. Welded steel pipe.
The second is the structure and working principle of high frequency welding equipment.
To understand the principle of high frequency welding, it is necessary to have the necessary technical means to realize it. High frequency welding equipment is used to realize high frequency welding. Electrical-mechanical system, high-frequency welding equipment is composed of high-frequency welding machine and welded pipe forming machine.Wherein the high-frequency welding machine is generally composed of a high-frequency generator And its function is to generate high-frequency current and control it. The molding machine consists of an extrusion roller frame, and its function is to make the material to be extruded. The part melted by high-frequency current is extruded to remove the oxide layer and impurities on the surface of the steel plate, so that the steel plate is completely fused into one.
The above is the working principle of ERW tube mill.
