3 results about "Surface function" patented technology

The invention discloses an additive manufacturing intelligent repairing and surface optimizing method for a complex special-shaped curved surface, and particularly relates to the technical field of additive manufacturing. A three-dimensional digital model is obtained, and a complex special-shaped curved surface defect area is recognized; extracting a local morphology parameter set; constructing a repair path generation model based on a graph neural network, and performing collaborative optimization of forming precision, residual stress and deposition stability on the path through a multi-objective optimization algorithm; additive manufacturing equipment is controlled to perform material deposition according to the optimized path; carrying out online error detection by adopting a structured light system, judging repair quality through a fuzzy decision tree model, and triggering path reconstruction if the repair quality exceeds a threshold value; after repairing is completed, surface micro texture factors are extracted, and functional texture regulation and control are conducted through the laser micromachining technology; according to the method, high-precision intelligent repair of the complex curved surface area and collaborative improvement of surface function performance are achieved, and the method is suitable for the fields of aerospace, energy, high-end equipment manufacturing and the like.

The application discloses a design method of a negative Poisson's ratio porous structure based on a three-period minimal surface, and belongs to the field of computer-aided design, and the specific operation steps are as follows: according to an initial minimal surface function, an extended minimal surface is constructed and solidified; considering the geometric characteristics of the generated porous structure and the buckling mode under the critical load, a problem model of constructing the extended three-period minimal surface with the negative Poisson's ratio is established; then, the problem model is simplified according to the geometric characteristics of the porous structure, and the construction parameters of the minimal surface porous structure with the negative Poisson's ratio are obtained through a step-by-step search method. The application realizes the coupling of the negative Poisson's ratio material and the minimal surface porous structure, two commonly used metamaterials, improves the performance and application range of the material, and can be used for guiding engineering design.