KR-20260065215-A - 3D pattern printing system for ship propellers

Abstract

A ship propeller 3D pattern printing system according to one embodiment of the present invention comprises: a shape design unit for designing a shape including thickness, area, ratio, pitch, and inclination angle of a ship propeller; a path setting unit for setting a pattern path along a surface between a leading edge and a trailing edge of a ship propeller; a pattern forming unit for forming a protrusion pattern along a pre-set path from the path setting unit; a laser output unit for depositing on a surface layer of a ship propeller using metal powder and a laser; a laser output unit for depositing on a surface layer of a ship propeller using metal powder and a laser; and a control unit for setting operation and process control variables of the laser output unit.

Inventors

• 김영수
• 이봉희

Assignees

• 재단법인한국조선해양기자재연구원

Dates

Publication Date

20260508

Application Date

20241101

Claims (5)

1. A shape design unit that designs the shape of a ship propeller including its thickness, area, ratio, pitch, and angle of inclination; A path setting unit that sets a pattern path along the surface between the leading edge and the trailing edge of a ship propeller; A pattern forming unit that forms a protrusion pattern along a pre-set path from the above path setting unit; A laser output unit that deposits metal powder and a laser onto the surface layer of a ship propeller; A ship propeller 3D pattern printing system comprising: a control unit for setting operation and process control variables of the laser output unit.
2. In Article 1, The above path setting unit is, A ship propeller 3D pattern printing system characterized by setting an optimal path by analyzing the direction of fluid flow, the curvature of the ship propeller surface, rotational speed, and the location of cavitation occurrence based on CFD data.
3. In Article 1, The above pattern forming part is, It is composed of either a shark skin riblet pattern or a fish skin seamless pattern, A ship propeller 3D pattern printing system characterized by arranging the pattern parallel to the direction of fluid flow in the introductory section to minimize initial turbulence, and configuring the direction of the pattern at a slight angle to the fluid flow in the outlet section so that the fluid can easily escape.
4. In Article 1, The above laser output unit is, A material supply unit that supplies metal powder or metal wire; A focusing lens section for focusing to enable the deposition and processing of metal powder and a laser; A laser nozzle section that melts metal powder using a high-power laser; A gas supply unit that protects the molten metal from oxidation; A camera unit that monitors the shape and size of the molten pool in real time; A ship propeller 3D pattern printing system characterized by including a curvature sensing unit that detects curvature by measuring the distance to the surface of the ship propeller.
5. In paragraph 1, The above control unit is, Based on an artificial neural network, it learns and analyzes features extracted from molten pool images to output and provide optimal process parameters, and A ship propeller 3D pattern printing system characterized by controlling process variables including the laser output, powder feed rate, mass flow rate, gas flow rate, and pitch of the laser output unit in real time.

Description

3D pattern printing system for ship propellers The present invention relates to a ship propeller 3D pattern printing system, and more specifically, to a ship propeller 3D pattern printing system capable of reducing cavitation occurring at the tail end of a ship's propeller and the resulting underwater radiated noise by implementing a 3D pattern on the surface of a propeller blade. Generally, a ship propeller installed at the stern is connected to and rotated by a drive shaft driven by the operation of an internal combustion engine, and is constructed with a structure in which multiple blades are formed radially on the outer circumference. However, the aforementioned conventional technology had a problem in which bubbles were generated due to friction during high-speed rotation of the propeller, and cavitation caused by these bubbles reduced the durability of the propeller. In addition, in the case of high-load propellers, there is a problem in that the magnitude of noise and hull pressure fluctuations increases significantly, causing discomfort to the crew and damage to the structure. Conventional technology for improving this involves a structure that reduces friction with the fluid by improving the shape of the propeller or forming multiple radial grooves on the blades around the center of the propeller as an axis. However, the conventional technology described above has the problem that grooves are formed radially, and since the grooves are formed in a direction different from the fluid entry direction during propeller rotation, the frictional force is doubled, thereby shortening the propeller's propulsion efficiency and lifespan, and consequently reducing the ship's fuel efficiency and increasing maintenance costs. FIG. 1 is a configuration diagram of a ship propeller 3D pattern printing system according to an embodiment of the present invention. FIG. 2 is a drawing for explaining a path setting unit of a ship propeller 3D pattern printing system according to an embodiment of the present invention. FIG. 3 is a drawing for explaining the pattern forming part of a ship propeller 3D pattern printing system according to an embodiment of the present invention. FIG. 4 is a drawing for explaining the laser output unit of a ship propeller 3D pattern printing system according to an embodiment of the present invention. FIG. 5 is a drawing illustrating the overall operation state of a ship propeller 3D pattern printing system according to an embodiment of the present invention. Specific embodiments of the present invention will be described in detail below with reference to the drawings. However, the concept of the present invention is not limited to the embodiments presented. Those skilled in the art who understand the concept of the present invention may easily propose other inventions that are inferior or other embodiments included within the scope of the concept of the present invention by adding, changing, or deleting other components within the same scope of the concept, and such are also to be considered to be included within the scope of the concept of the present invention. Hereinafter, the ship propeller 3D pattern printing system of the present invention will be described in detail with reference to the attached FIGS. 1 to 5. FIG. 1 is a configuration diagram of a ship propeller 3D pattern printing system according to an embodiment of the present invention. Referring to FIG. 1, a ship propeller 3D pattern printing system (100) according to an embodiment of the present invention includes a process of designing the shape of a ship propeller (1), forming a special pattern on its surface, and additively processing it using metal powder and a laser. Through this, the goal is to manufacture a ship propeller (1) that provides optimal hydrodynamic performance. An embodiment of the present invention includes a shape design unit (110), a path setting unit (120), a pattern forming unit (130), a laser output unit (140), a control unit (150), etc., and each of these components cooperates to control the operation of the entire system and to achieve optimal performance. First, the shape design unit (110) is responsible for designing the shape of the ship propeller (1), including its thickness, area, ratio, pitch, and angle of inclination. This design is related to the basic fluid performance of the propeller (1) and is optimized to maximize the propulsion of the ship. The shape design unit (110) models a three-dimensional shape using computer-aided design (CAD) software and derives a design that exhibits optimal performance under specific conditions by adjusting various parameters. For example, the shape parameters of the propeller (1) can be adjusted by considering the sailing speed, rotational speed, load conditions, etc. The shape design unit (110) may apply multiple optimization algorithms to reflect various hydrodynamic characteristics according to navigation conditions. For example, during the design process, th