Application of Laser Arc Hybrid Welding in Ship Industry

1. Development of laser arc welding With the progress and development of science and technology, the level of ship production technology has improved. Shipbuilding materials and ship design have also changed with time. In 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, the guidance and development direction of the shipbuilding industry planning are clearly mentioned. The policy is to deeply transform and accelerate development, and unswervingly follow the new industrialization route. At the same time, it has enhanced the ability of independent development and innovation and the supporting capacity of marine equipment to improve the core competitiveness of China's shipbuilding industry; it will "attract" and "go over". At the same time, shipbuilding companies should focus on introducing digestion and absorption of modular outfitting, high-efficiency welding, cutting and other core technologies in shipbuilding and developing modern shipbuilding industry production, operation and management methods in our country. Laser welding, as a new welding process, has gradually emerged in various industries. Laser welding has the advantages of high welding efficiency, good weld quality, and small loss of welding materials. For medium and thick plate materials, laser arc composite welding has become the leading welding technology and is being applied in aerospace, military, rail transit, steel structure, shipbuilding and other industries. For the splicing welding of ship plates in the plane section in the shipbuilding process, Pentium Laser has developed a high-power laser arc composite welding process, which is suitable for car-type laser arc composite welding machine for ship splicing welding, large gantry laser arc composite welding machine, etc. Robot laser arc composite welding machine Laser arc composite welding weld shape In traditional ship plate splicing welding, submerged arc welding or gas shielded welding is generally used. Traditional submerged arc welding cannot achieve double-sided forming of single-sided welding. After the front welding is completed, it is necessary to turn over the process, and then carry out the back welding again. The area of the ship welded is large and the thickness of the plate is large. Therefore, the turning over requires special equipment, the price is high, and the use process is dangerous. In order to avoid the danger of the production and manufacturing of the ship in the plane section, foreign shipbuilding companies, especially some European shipbuilding companies, have successively introduced the laser arc composite welding process and equipment. 2. The trolley-type laser arc composite welding machine The trolley-type laser arc composite welding machine is designed for the welding station of the ship in the plane section. The equipment is similar to the ship submerged arc welding trolley in the overall structure. The trolley welding machine has 3 servo axes, which are X, Y, and Z axes respectively. In addition, the equipment is equipped with a weld seam tracking system, which can realize real-time monitoring of the weld seam and ensure the precision of the weld position. In terms of process, a laser arc composite welding process is adopted, which can realize single-sided welding and double-sided forming. In terms of laser power, it can be matched with a 20KW-30KW laser to achieve no-flip welding of 6mm-30mm plate thickness. Compared with traditional welding, the consumption of welding consumables is reduced by 80% and the power consumption is reduced by 40%. 3. Large-scale gantry laser arc composite welding machine