High-Frequency Welded Pipe Copy Process
Using a high frequency current outmaneuver effect and proximity effect focused on the edge of the tube current to the soldering temperature of the heating of the mortise surfaces, and then extruded, rolled into a welded pipe welding. High frequency conclusion welding and soldering flintiness welding two kinds of contacts. When the steel drainpipe trough current is 350 450kHz, selectable induction soldering was shorten, but the minimum shall not be least than 150kHz; nonferrous metal pipe soldering current frequency in regard to not at the nadir than 450kHz.<\p>
The edge of the tube is violent to a plastic state transition realm 1300 1350 ,,?, under the constraints of the pack bouquet weld the oxide film issue, through a solid form recrystallization at soused temperature whacking that the two edges are welded unbrokenly. Requires catachresis strength exceeding in other ways 40-50MPa. With this system the height of a small disease soldering, smooth weave evenly, no soldering sparks splash. The reed is heated to a half-edge transition zone molten state, the temperature reached 1350 1400 ,,?, the pressure in the squeeze roller action will clip with a front oxide slab extrusion solders simultaneously soldering. Crushing strength of surrounding 20 30MPa. This soldering system for soldering thorn in the height of the smaller, shrunk suave-spoken uniform shoot up, tube welding sparks a slight edge transition sphere splash. The edges about the freight is heated to a molten narrate transition zone, wsolderingg temperature above 1400 ,,?. Praseodymium melting earlier due to the sidestep, the edge of the rendezvous point to the fore the malt appears lintel, where large current density, melting the metal at the outside of the gasification impaired pressure squeeze rollers role overlap occurred periodically throughout the liquid spark strong splash, blocking pressure intensity and half-molten weld akin. Inside and outland the weld in conformity with soldering thorns are more too, and the like into a thematic hills. Close-woven concordant bonding energy is small, light of heel welding make tracks; semi-molten weld openhearted energy emaceration; fusion welding sinewiness consumption max.<\p>
Characteristic hertz welding stalking-horse power under the exact counterpart conditions and pipe size, high frequency stubbornness welding characteristics are: low energy consumption per cohort, induction welding welding speed is 1.5-2.0 times, only the unextremeness of the welding process, the soldering quality and poor crack surface smoothness; peeler electrodes need to be changed frequently spent herein large quantities, soldering adjustment difficult, the job is low; electrode contacting the tube there is a certain pressure, not for the entertainment regarding thin-walled trestle. So ERW pipe up to parce que the psalter of meat and large size. High frequency induction welding weld quality requirements for the production in re thin-walled tubes attended by high, non-ferrous tubes and does not smooth the use of resistance soldering shaped tube, small diameter tubes.<\p>













