3D printing system based on multi-axis linkage control and machine vision measurement

Abstract

The invention relates to a 3D printing system based on multi-axis linkage control and machine vision measurement. The 3D printing system comprises a rack, a workbench for placing an artificial bone scaffold, a printing device arranged above the workbench, a material conveying device for conveying a printing material, an image collection camera, a drive mechanism for adjusting the direction of the printing device and a control system, wherein the printing device, the material conveying device, the image collection device and the drive mechanism are all connected with the control system; the workbench is a six-degree-of-freedom parallel platform connected with the rack; the drive mechanism is a six-axis mechanical arm; and the printing device is connected with the six-axis mechanical arm. When in use, the artificial bone scaffold is put on the six-degree-of-freedom parallel platform, and the position of the printing device is controlled by the six-axis mechanical arm; and through the cooperation between the six-degree-of-freedom parallel platform and the six-axis mechanical arm, accurate control on the spatial position of a printing nozzle of the printing device is realized, and three-dimensional pattern printing is realized on a complicated tiny artificial bone surface and the internal surface of a porous structure.

Description

Technical field [0001] The invention relates to a 3D printing system based on multi-axis linkage control and machine vision measurement, belonging to the field of 3D printing. Background technique [0002] With the improvement of living standards, people pay more attention to medical care. However, some diseases and traffic accidents have caused serious damage to human bones. Due to the limitation of technology, it is difficult to repair at this stage. Many patients lose the ability to take care of themselves. This has brought serious impacts on patients and their families. At present, the main method to deal with the problem of bone defect is to rely on autologous tissue transplantation, allogeneic tissue transplantation, and the use of alternative materials to repair. At present, these methods have major drawbacks, such as two operations, limitation of bone extraction, disease transmission, and low osteogenic activity. Autologous bone is to obtain some bones from other parts ...

AI Technical Summary

Problems solved by technology

[0006] In the current 3D printing device, there are nozzle structures and nozzle driving mechanisms that are relatively complicated, and printing accuracy is difficult to control. For example, the ends of each nozzle in the authorized announcement number CN 103948456 B are on the same plane and move at the same time. Large space, not suitable for 3D printing on the inner surface of porous structure

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