PE (Polyethylene) electric melting pipe fitting welding technology parameter establishing method

Abstract

The invention relates to a PE (Polyethylene) electric melting pipe fitting welding technology parameter establishing method which comprises the following steps: (1) establishing a three-dimensional structure model where electric melting pipe fittings and pipes are matched in Pro / Engineer; (2) guiding the three-dimensional structure model into ANSYS WORKBENCH to establish an electric-thermal-mechanical multi-physical field coupling model; (3) setting thermal performance parameters, mechanical parameters and electric parameters of related materials; (4) initially determining PE electric melting pipe fitting welding voltage; (5) setting model electric field, temperature field and force field load according to the welding voltage determined in the step (4) and actual situations; (6) setting divided types of model meshes and mesh sizes, and then dividing the meshes; (7) setting load loading time and step length, and resolving; (8) extracting resolved results and determining welding technology parameters. The PE electric melting pipe fitting welding technology parameter establishing method disclosed by the invention improves welding degree judging accuracy, guarantees welding quality between the PE electric melting pipe fittings and pipe connectors, improves electric melting pipe fitting welding technology parameter establishing accuracy, and reduces energy waste in a welding process.

Description

technical field [0001] The invention relates to a method for formulating welding process parameters of PE electric fusion pipe fittings. Background technique [0002] The main body of PE electrofusion pipe fittings is a sleeve made of polyethylene material, and a spirally wound resistance wire is embedded in the inner wall of the sleeve. Both ends of the resistance wire are connected with terminal posts, and the two terminals of the sleeve extend out for the connection of the electric fusion welding machine. Electrofusion welding refers to inserting the two pipe ends to be welded into the electric fusion pipe fittings and closely fitting them together, using an electric fusion welding machine to energize the two terminals of the electric fusion pipe fittings, causing the resistance wire to produce a Joule effect, and adjusting the energization time to accumulate heat so that When the temperature reaches the melting point of the polyethylene pipe, the outer wall of the pipe a...

AI Technical Summary

Problems solved by technology

This method saves manpower, financial resources and time, but only judges the welding process through the temperature field, and cannot judge whether the welding temperature is reached in advance due to the rapid rise in temperature caused by local parallel wires or the situation of over-welding, etc., and it is often useful in actual welding construction In the case of welding of the same type of pipe fittings with different types of pipes, only by judging whether the temperature field meets the melting standard, in the case of welding with different clearance fits, it cannot be judged whether the molten slurry between the pipe fittings and the pipes is fused, and the judgment factor is single, resulting in the accuracy of the judgment results Greatly reduced

Images