Laser anti-counterfeit marking method for product with complex profile

Abstract

The invention relates to a laser anti-counterfeit marking method for a product with a complex profile. An anti-counterfeit mark pattern is designed in a specific anti-counterfeit zone, a vector pattern of an anti-counterfeit mark is split and a process reference point is selected by a specific splitting algorithm, short segments are scanned and machined according to specific process parameters, and finally the anti-counterfeit mark pattern can be marked on the surface of the product with the complex profile. Since position information, splitting information and machining process parameter information are carried in the anti-counterfeit mark pattern, counterfeiters need to obtain the accurate curved surface model of the complete profile, the accurate contour and position of the anti-counterfeit marking zone, the specific algorithm for splitting of the vector pattern of the anti-counterfeit mark, the specific algorithm for selection of the process reference point, laser process parameters of the short segments and the like for counterfeiting in addition to a laser machining device, all the information is key to counterfeiting, and thus technical difficulties in counterfeiting are improved. Therefore, the laser anti-counterfeit marking method has good anti-counterfeiting effects.

Description

technical field [0001] The invention belongs to the field of laser processing applications, and in particular relates to a laser anti-counterfeiting marking method for products with complex profiles. Background technique [0002] Anti-counterfeiting technology refers to the measures taken to achieve the purpose of anti-counterfeiting. It can accurately identify the authenticity within a certain range, and it is a technology that makes products difficult to be imitated and copied. There are many types of anti-counterfeiting technologies, mainly including digital anti-counterfeiting technology, bar code technology, two-dimensional code technology, laser holographic anti-counterfeiting technology, invisible image anti-counterfeiting technology, securities pattern technology, miniature anti-counterfeiting technology, refractive latent image anti-counterfeiting technology, staged decryption technology and radio frequency identification Anti-counterfeiting technology, etc. In par...

AI Technical Summary

Problems solved by technology

However, the invention adopts the laser galvanometer projection processing method based on the "3+2 axis" form, and there is a single coordinate system overall projection, processing dead angles and the limitation of completely relying on the discrete point cloud data model.

The second is the Chinese patent with the application number 201110048935.3 and the title of the invention "a laser processing method and device suitable for complex curved surfaces". Linkage of CNC machine tools effectively solves the limitation of using a "3+2 axis" form of laser galvanometer projection processing technology in the former scheme. Since there is only one fixed light projection direction, only a single coordinate system can be used for overall projection.

However, the combination of this information network anti-counterfeiting technology and laser vector marking technology still has two deficiencies: 1) This technology simply adds randomly generated anti-counterfeiting feature patterns on the basis of the original laser anti-counterfeiting marking method As well as the follow-up information network anti-counterfeiting identification, these two anti-counterfeiting information enhancement methods have no improvement on the laser anti-counterfeiting marking technology itself. Obviously, as long as the counterfeiters have obtained the anti-counterfeiting characteristic pattern or the random generation algorithm of the anti-counterfeiting characteristic pattern, they can still purchase laser marking. engraving equipment to mark genuine marks on counterfeit products, making the anti-counterfeiting ineffective; 2) This technology uses a two-dimensional vector laser marking system, which cannot be used for laser anti-counterfeiting marking methods on complex-shaped products