In recent years, “precision shipbuilding” and “rapid shipbuilding” have become the main trends in the development of shipbuilding industry. Laser cutting technology has been rapidly developed, occupying more than 70% of the whole laser processing industry. Ship manufacturing industry is mainly based on steel plate raw materials, the use of laser cutting plate, can replace some need to use complex large die punching processing methods, greatly shorten the production cycle and reduce costs. At present, the ship industry hull plate parts blanking methods mainly adopt flame cutting, plasma cutting, shear processing and laser cutting. Other cutting methods have many shortcomings relative to laser cutting, such as flame cutting and plasma cutting slit wide, cutting precision is poor, easy to produce harmful gas, environmental pollution. And laser cutting for ship plate cutting, with high cutting precision, small thermal deformation, reduce secondary processing (such as milling, drilling, etc.), transfer, grinding, especially small circle, hole, surface processing advantages, in line with the accuracy requirements of hull segment transfer, can fully ensure that the frame assembly clearance control in the 1mm range, But its practical cutting speed in steel is worse than that of plasma cutting.
Ship cutting has a high requirement on the precision of hull section transfer and the gap of frame transfer must be controlled within 1mm. In the past, when ship manufacturing enterprises generally used plasma to cut the ribs, cutting margin was set on the ribs in order to ensure the assembly gap, which required manual cutting during the field assembly. The cutting quality was uneven, and the residual oxide in the slit increased the assembly workload and the assembly cycle increased, resulting in the extension of the whole section construction cycle. In addition, the use of laser cutting machine to eliminate the assembly surplus, eliminate the phenomenon of on-site cutting, reduce the waste of labor and materials, frame assembly speed is significantly accelerated, assembly quality is significantly improved.
In the field of Marine manufacturing, the laser cutting machine avoids the occurrence of uneven cutting quality caused by the setting of cutting margin on the rib plate in order to ensure the assembly gap when plasma is cutting the rib plate. Thus reduce the assembly workload, assembly cycle, material and labor cost waste. The Marine steel plate cut by laser has good seam quality, good verticality of the incision surface, no hanging slag, thin oxide layer, smooth surface, no need for secondary processing, direct welding, small thermal deformation, high curve cutting precision, reduce working hours, and achieve accessible cutting high strength ship plate. Deviation of the clearance amount of the ship’s internal timbers.
Post time: Mar-29-2023