ASSEMBLY
In the shipbuilding process, JL Heavy Industry builds its history by accurately assembling
cut steel materials in the correct position, which is the second stage of hull construction.
The assembly process proceeds as a ONE-STOP operation from cutting and processing all materials required for shipbuilding and marine steel structures to assembly.
By simplifying the cutting, processing, assembly, and process management points, we show the best quality with JL Heavy Industry's unique know-how and technology.
Sub-Assembly
Sub-assembly is the process of attaching and welding reinforcements or brackets to parts cut from steel plates, creating very small blocks of the ship.
The completed sub-assemblies go through manufacturing processes from sub-block assembly to block assembly, being made into hundreds of blocks, and finally completed as a massive ship.
As we perform the earliest process in shipbuilding, we are doing our best in production to ensure there are no mistakes or errors.
Laser cutting services boast precise cutting and high productivity.
It can process various materials and maintains high-precision product quality with minimal thermal deformation. It also enables efficient production with fast working speeds. We provide perfect results with the best cutting technology.
Sub-Block Assembly
Sub-block assembly is the work of assembling plates and frames and attaching cut/bent parts and sub-assembled parts to create a panel forming one side of a block.
Sub-block assembly is divided into three processes: assembling flat blocks, curved blocks, and hull superstructure blocks.
Flat Blocks
Flat blocks, such as bottom plates, side plates, and bulkhead plates, where ribs are attached to flat plates, are assembled on a conveyor by joining plates to form a flat plate the size of a block, and then ribs are attached on top.
In this work, dedicated assembly devices are used to automatically attach and weld. After attaching the ribs, floors are attached perpendicular to the ribs to reinforce the block in a grid pattern.
Curved Blocks
Parts of the ship's bow and stern have curved outer plates. Curved blocks are assembled in an assembly area with adjustable height jigs according to the curve. The pin jigs are adjusted to match the curve of the outer plate, and the outer plate materials are assembled on top to form the hull curve.
Hull Superstructure Blocks
Hull superstructure blocks are composed of relatively thin plates compared to outer plate blocks. These blocks have a slight slope due to deck camber, so the same method as curved block assembly is used.
Block Assembly
This is the work of assembling one area of the ship's space by combining sub-assemblies, sub-block assemblies, and cut/bent parts. Sub-block assembled blocks are further formed into three-dimensional blocks and assembled to a size that can be erected in the dock. The size of the blocks is planned at the design stage considering the facility capacity of the workplace and work efficiency. In some cases, block-assembled blocks are assembled into larger blocks near the dock before erection.
