Influence Of Welding Pressure On Welding Of High-frequency ERW Pipe Unit

Resistance welding As the name suggests, resistance welding is a method in which a weld is combined and pressure is applied through an electrode, and the current is passed through the contact surface of the joint and the resistance heat generated in the vicinity. High-frequency welding: When high-frequency current passes through a metal conductor, two strange effects are produced: skin effect and proximity effect. High-frequency welding uses these two effects to weld the steel pipe. The basis of high frequency welding.

High-frequency welding uses the skin effect to concentrate the energy of the high-frequency current on the surface of the workpiece; the proximity effect is used to control the position and range of the high-frequency current flow path. The speed of the current is very fast. It can heat and melt the edges of the adjacent steel plates in a short time, and achieve their own strengths through the extrusion, and each has its own shortcomings. Generally, specific choices should be analyzed according to specific conditions.

Mainly due to different principles, resistance welding, as the name suggests, resistance welding is a method of applying pressure through electrodes after welding, and using electric current to generate welding through the contact surface of the joint and the resistance heat generated in the adjacent area. High-frequency welding: When the current passes through a metal conductor, two strange effects are produced: skin effect and proximity effect. High-frequency welding uses these two effects to weld the steel pipe. The basis of high frequency welding.

High-frequency welding uses the skin effect to concentrate the energy of the high-frequency current on the surface of the workpiece; the proximity effect is used to control the position and range of the high-frequency current flow path. The speed of the current is very fast, it can heat, melt and join the adjacent steel plate edges in a short time.

Understand the influence of welding pressure on welding, in order to better operate and adjust the high-frequency erw steel pipe unit to achieve higher efficiency. Let us take a look at the impact of welding pressure on high-frequency straight seam pipe welding machines today. Welding pressure is also the main parameter for high frequency welding. Theoretical calculations suggest that the welding pressure should be 100~300MPa, but the actual pressure in this area in actual production is difficult to measure.

It is generally estimated based on experience and converted into the amount of extrusion at the edge of the pipe. Different wall thicknesses take different extrusion amounts. Usually, the extrusion amount below 2mm is 0.5t~t when 3~6mm; 0.5t when 6~10mm; 0.3t~0.5t when 10mm or more. In the production of API steel pipe, weld gray spot defects often occur, and gray spot defects are refractory oxides. In order to achieve the purpose of eliminating gray spots, Baosteel and other manufacturers have adopted a method of increasing the pressing force and increasing the welding allowance. The extrusion allowance of steel pipes of 6mm or more is 0.8~1.0, and the effect is very good.

A worker from a steel pipe company, which is located in China.