Working principle of high frequency welding

The working principle of high-frequency welding is to concentrate high-frequency electric energy on the surface of weldment by using the skin effect of high-frequency current, and to control the position and range of high-frequency current flow route through proximity effect. When high-frequency current is required to concentrate on a certain part of the weldment, the conductor and the weldment form a current loop, and the conductor is brought close to this part of the weldment, so that they form adjacent conductors with each other.

According to the specific form and special requirements of weldment structure, high frequency welding mainly uses skin effect and proximity effect to make the surface metal of weldment weld quickly and realize welding. The two main functions of high frequency current in high frequency welding are as follows:

1. Skin effect: When alternating current is applied to a conductor, the current distribution on the conductor section is uneven, the current density gradually increases from the center of the conductor to the surface, and most of the current only flows along the conductor surface. The lower the resistivity, the greater the permeability, and the higher the current frequency, the more obvious the skin effect.

2. Proximity effect: When high-frequency current flows in opposite directions in two conductors or in a reciprocating conductor, the current will be concentrated on the adjacent side of the conductor.

Extended data?

Use and maintenance of high frequency welding

There are many factors that affect the quality of high frequency welding, and these factors interact in the same system. If one factor changes, so will other factors.

When adjusting high frequency, we should not only pay attention to the local adjustment of frequency, current or extrusion amount, but also adjust from all aspects related to high frequency welding according to the specific situation of the whole molding system. After high-frequency welding, air must be removed, and the solder joint must be pressed with tools to discharge excess air, so as to achieve the purpose of full solder joint.

Baidu encyclopedia-high frequency welding

Baidu encyclopedia-high frequency welding