Efficient and automatic welding process for rack and semi-chord pipe

Abstract

The invention relates to a welding process, in particular to an efficient automatic welding process for a rack and a semi-chord tube. The method is suitable for connection between semi-chord plates with different thicknesses and rack plates and specifically comprises the following steps that a narrow groove is designed; after the grooves are grouped, arc striking plates consistent with the grooves in shape are connected to the starting position and the final position of a welding bead; selecting protective gas; whether pre-weld preheating and post-weld heat treatment are carried out or not is determined according to the strength level of the plate; two narrow-gap gas shield welding robots are adopted to work in a matched mode at the same time. Welding process parameters are selected; the interlayer temperature in the welding process is controlled; a laser tracking system is used for monitoring the position of the welding wire; and during double-sided welding, turning-over welding is carried out when welding is carried out for 1-4 passes, or double-sided simultaneous welding is realized by adopting a double-robot welding system. The welding penetration is increased, the welding quality is superior to that of a traditional welding method, the stress of a welding joint is effectively controlled, the product stability is well controlled, the welding efficiency is greatly improved, and the welding cost is greatly reduced.

Description

technical field [0001] The invention relates to a welding process, in particular to a high-efficiency automatic welding process of a rack and a half-chord. Background technique [0002] With the development of major technical equipment such as deep-sea oil and gas production platforms, the thickness and strength of plates are also increasing. Welding, the most important connection method, is also facing more and more severe challenges. At the same time, welding quality, The contradiction between welding cost and welding efficiency is increasingly apparent. [0003] The jack-up drilling platform is the mainstream marine engineering equipment for offshore oil and gas exploration (within a water depth of 200m).” To be able to “stand up, rise above, and pull out”, the pile legs are the key, and its structural design and The production and manufacturing will directly affect the operation safety and use effect of the platform. The rack and half-chord are the core bearing componen...

AI Technical Summary

Problems solved by technology

The welding of the rack plate and the half chord is mainly manual welding. The welding workload is huge, and the welding depth does not reach the thickness of the plate. It is difficult for workers to ensure the stability of welding quality under high-intensity work, and the manufacturing cycle is long. The current production status seriously restricts the delivery time of the platform and the market competitiveness of the enterprise

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