A method for formulating welding process parameters of pe electrofusion pipe fittings based on finite element

Abstract

The invention discloses a PE electric smelting pipe fitting welding parameter setting method based on finite elements. The PE electric smelting pipe fitting welding parameter setting method comprises the following steps: (1) initially determining the welding voltage of a PE electric smelting pipe fitting; (2) setting thermal analysis parameters; (3) establishing a finite element heat transfer model for connecting the electric smelting pipe fitting and a pipe in ANSYS WORKBENCH; (4) setting contact thermal conductivity coefficients between a thermal fuse and the PE material and between the electric smelting pipe fitting and the pipe in the electric smelting pipe fitting; (5) setting the division type of a model mesh and the size of the mesh, and then dividing the mesh; (6) carrying out loading heating on the model; (7) setting analysis time and step length for solution; (8) extracting the result of the solution and determining welding parameters. According to the method, the setting efficiency of the welding parameters of the electric smelting pipe fitting is improved, and the welding quality of the PE electric smelting pipe fitting is ensured.

Description

technical field [0001] The invention relates to a finite element-based method for formulating welding process parameters of PE electric fusion pipe fittings. Background technique [0002] PE pipes are widely used in gas transmission, water supply, sewage, agricultural irrigation, oil fields, mines, chemical industry, post and telecommunications and other fields due to their advantages of light weight, low price, wear resistance, corrosion resistance and insulation. [0003] Electrofusion welding is the main way of connecting PE pipes. Electrofusion welding mainly melts the welding area between PE electric fusion pipe fittings and PE pipes by energizing the resistance wire embedded in PE electric fusion pipe fittings. Under the action of internal expansion pressure, Polyethylene polymer chains diffuse and entangle with each other, forming a strong connection after cooling. The welding process parameters of PE electric fusion pipe fittings are directly related to the success ...

AI Technical Summary

Problems solved by technology

In the second method, the existing technology ignores too many details, which makes it difficult to determine the welding process parameters. At the same time, some methods are too complicated to implement and have poor versatility.

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