Powder bed additive manufacturing, grafting, printing, clamping and positioning method

Abstract

The invention relates to the technical field of additive manufacturing, in particular to a powder bed additive manufacturing grafting printing clamping and positioning method which comprises the steps that 1, a machining base is fixed to a lifting part of a forming platform; the forming platform is further provided with a reference part, the reference part comprises a horizontally-arranged forming plane, and a reference coordinate system is arranged on the forming plane and recorded as a forming coordinate system; 2, the height of the lifting part is adjusted, and the top face of the machining base and the forming plane are located at the same height; 3, a camera installed at the top of the additive manufacturing equipment is adopted to shoot a to-be-processed image, and the content of the to-be-processed image comprises the top face of the processing substrate; step 4, calculating position information of the top surface contour of the processing substrate in the forming coordinate system; and 5, the top surface contour of the machined substrate and the position information of the machined substrate in the forming coordinate system are imported into slicing software. According to the method, during additive manufacturing grafting printing based on powder bed fusion forming, accurate positioning of the model of the additive manufacturing part can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a method for grafting, printing, clamping and positioning in powder bed additive manufacturing. Background technique [0002] Additive Manufacturing (AM), commonly known as 3D printing, is an emerging advanced manufacturing technology that has the advantages of a high degree of digitization and the ability to form complex spatial structures. It integrates computer-aided design, material processing and forming technology, and based on digital model files, through software and numerical control system, special metal materials, non-metal materials and medical biological materials are processed according to extrusion, sintering, melting, light curing, light curing, etc. A manufacturing technology that builds up layer by layer by spraying and other methods to create physical objects. [0003] Powder bed fusion forming additive manufacturing is an important process in a...

AI Technical Summary

Problems solved by technology

[0005] If the above-mentioned grafting technology can be successfully implemented, it will not only be able to give full play to the advantages of the powder bed fusion forming additive manufacturing process, but also can effectively make up for its shortcomings of low efficiency and high cost, which is undoubtedly of great significance for the promotion and application of this industry

However, in practical applications, there is a serious problem in graft printing, that is, how to position the model of the additively manufactured part to ensure that the additively manufactured part has an accurate relative positional relationship with the machined substrate, so that the final manufactured parts have the correct geometry

If the model positioning of the additive manufacturing part is not accurate enough, that is, the bottom surface of the grafted printed part does not completely coincide with the top surface of the processed substrate, even if there is only a small error, the formed workpiece will not meet the quality requirements due to the misalignment of the two parts , cannot be put into industrial use

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