Laser Arc Hybrid Welding: a New Choice for Efficient Welding in the Shipbuilding Industry

Apr 08, 2024

1. Development status of laser arc hybrid welding

With the advancement and development of science and technology, the level of ship production technology has improved. Shipbuilding materials and ship design are also changing over time. The "Medium and Long-term Development Plan for the Shipbuilding Industry" approved by the General Office of the State Council during the 11th Five-Year Plan period clearly mentions the guidance and development direction of the shipbuilding industry plan. Its policy is to deepen transformation, accelerate development, and unswervingly pursue new industrialization. route; at the same time, it enhances independent development and innovation capabilities and marine equipment supporting capabilities to improve the core competitiveness of China's shipbuilding industry; it takes into account both "attracting in" and "going over", and at the same time, shipbuilding companies should focus on introducing digestion and absorption of modularization Outfitting, high-efficiency welding, cutting and other core technologies in ship manufacturing and the development of production, operation and management methods for my country's modern ship manufacturing industry.

As an emerging welding process, laser welding is gradually emerging in various industries. Laser welding has the advantages of high welding efficiency, good weld quality, and low welding material loss. For medium and thick plate materials, laser arc hybrid welding has become the leading welding technology and is being used in aerospace, military industry, rail transit, steel structure, shipbuilding and other industries.

For the splicing welding of ship plates in plane segments during the ship manufacturing process, Penta Laser has developed a high-power laser arc hybrid welding process, a trolley-type laser arc hybrid welding machine and a large-scale gantry laser arc hybrid welding machine suitable for ship splicing welding. wait.

In traditional tailor welding of ship plates, submerged arc welding or gas shielded welding is generally used. Traditional submerged arc welding cannot achieve single-sided welding and double-sided forming. After the front side welding is completed, a flipping process is required and the back side welding is performed again. Tailor-welded ships have a large area and thick plates. Therefore, turning over requires special equipment, which is expensive and has certain risks during use. In order to avoid the dangers of planar segmented production of ships, foreign shipbuilding companies, especially some European shipbuilding companies, have successively introduced laser arc hybrid welding processes and equipment.

2. Cart-type laser arc hybrid welding machine

The large-scale gantry laser arc hybrid welding machine is equipment designed for the flat segmented automated assembly line ship plate tailoring welding station. Different from the trolley-type laser arc hybrid welding machine, the gantry-type hybrid welding machine adopts the working principle that the gantry is fixed and the ship plate moves on the workbench. Similarly, the gantry-type composite welding machine is equipped with 3 servo axes and a welding seam tracking system. In terms of technology, the laser arc hybrid welding process is adopted, which can achieve single-sided welding and double-sided forming. In terms of laser power, it can be used with 20KW-30KW lasers to achieve flip-free welding of 6mm-30mm plate thicknesses. Compared with traditional welding, welding material consumption is reduced by 80% and power consumption is reduced by 40%.

To sum up, in the plane segmentation of ship manufacturing, Penta Laser has developed two pieces of equipment for tailor welding of ship plates. Penta Laser is a foreign-owned company. Through the globalization of its technology and localization of equipment, it has localized its business. Increasingly intense scientific and technological progress has brought about increased demands for intelligent ship production technology, shipbuilding materials and technologies for safety, reliability and shipbuilding efficiency. The traditional cutting and welding technology in shipbuilding manufacturing will definitely be replaced by new technology. Laser is also known as "the fastest knife", "the most accurate ruler" and "the brightest light". With its advantages of precise beam and high speed, laser manufacturing technology is the most popular in plane cutting or welding. It will definitely be the mainstay in the intelligent ship production process.

Stay tuned for more industrial applications of laser welding!

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