A method for controlling the weld seam formation of Hass alloy conductive roller laser penetration welding

Abstract

A Hass alloy conduction roller laser penetration welding seam forming control method, using Hass alloy steel plate for cylinder rounding, the edge of the plate of the butt joint before the rounding is processed into a bevel, and the butt joint after the rounding forms an I-shaped slope The rounded cylinder is assembled on the fixture to complete the joint assembly; the laser welding seam forming control adopts the air-cooled-copper liner to control the back of the weld to form, and the back of the butt joint is pressed tightly on the air-cooled-copper liner, and the copper liner Gas grooves and shielding gas passage holes for controlling the shape of the weld are processed on the pad; before laser welding, the shielding gas is pre-passed to the air-cooled-copper pad to drive away the air, and high-purity Ar is always fed to the copper pad during the welding process gas; carry out laser spot welding of butt joints, during the welding process, the laser beam completely melts through the welding, forming fusion holes, and realizing double-sided forming in one welding. The invention solves the difficult problem of Hass alloy welding and ensures the use quality of the conductive roller in the manufacturing process of the conductive roller of the electrogalvanizing unit of the automobile plate.

Description

technical field [0001] The present invention relates to laser welding seam forming control technology, in particular to a Hass alloy conductive roller laser penetration welding seam forming control method, especially suitable for I-type groove thick wall made of conductive roller of automobile plate electrogalvanizing unit Laser welding of Hass alloy materials. Background technique [0002] Hass alloy mainly uses wire-filled argon arc welding (GTAW welding). For thicker plates, manual argon tungsten arc welding (GTAW) is often used as a primer, and manual arc welding (SMAW) is used to cover the surface. It can also be welded Metal inert gas shielded welding (GMAW), submerged arc automatic welding (SAW) and other methods of welding. [0003] In the prior art, Document 1 discloses "The welding metallurgy of HASTELLOY alloys C-4C-22 and C-267", using the GTAW method to weld C-4, C-22 and C-267 to study the thermal crack sensitivity of materials Document 2 "Hastelloy C-22 allo...

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the GTAW method is mainly used for Hass alloy welding, and the groove needs to be opened if it is more than 3mm. The use of multi-layer multi-pass welding will inevitably lead to a wide welding heat-affected zone (HAZ) and large welding residual stress; secondly, multi-layer multi-pass welding, welding Pores, inclusions, and unfused defects are easy to form in the seam; adding filler metal to the weld may lead to the formation of low-melting point compounds, induce welding hot cracks, and reduce the corrosion resistance of the weld

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