High frequency welding H-beam;
Two shunting end pieces (T-section, H59- 1 brass) and five resistance pieces (thickness 1.5, width 20, length 45, manganese copper plate); In the way of high-frequency heating; Welding with special solder of copper and phosphorus; Requirements: Brazing process ≤ 1min, with emphasis on positioning and welding (gas welding was used in the previous brazing process). Main technical and economic indicators: there is no oxidation on the surface of the product after welding, and the welding quality is higher than that of gas welding; The end piece and the resistor piece are welded reliably without melting deformation; Ensure the resistance performance of the shunt; The production efficiency has been tripled.
The technical characteristics of high frequency welding of light H-beam are: (1) high welding speed, which can reach18-45 m/min; (2) the thermal influence is small, and it is easy to control the deformation of H-beam; (3) H-beams with different material combinations can be welded; (4) Micro-tension production can be realized and welding stress can be reduced. Technical level: (1) high accuracy of section size; (2) Excellent section performance; (3) The section size can be customized according to user's requirements.
Under the same specifications and materials, hot-rolled H-beam can completely replace welded H-beam, and the quality of the former is better than the latter. Generally speaking, in structural design, hot-rolled H-beam should be used for multi-storey buildings, and welded variable cross-section H-beam is better for light steel workshops with portal frame structure, but the project cost can not be saved much. The reason is that the processing capacity of hot-rolled H-beam is small and the construction period is slightly shorter. If the comprehensive economic benefits (including after the project is put into use) are calculated, if the construction period plays a decisive role, hot-rolled H-beam can be selected, but when the construction period is not required.