FIELD: machine building.
SUBSTANCE: method for polymer tubes welding via electric sleeves consists in power supply to electric spiral of sleeve for specified period of time and welded joint cooling to ambient temperature. Along the polymer tubes in front of and behind the sleeve housing coaxially the tubes there attached are the blocks consisting of two coils reeled on ferromagnetic core in a form of semi-cylindrical segment along its height. Note that the coils from two blocks are connected into one circuit in such a way that the directions of axial forces of magnetic field of each coil coincide, at that the circuit is connected to alternator that helps to adjust longitudinal oscillations of electric spiral by changing the frequency and current amplitude in coils.
EFFECT: decrease of negative influence of the gap between tube and sleeve in the course of welding, welding joint becomes stronger.
3 cl, 2 dwg
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