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Rotary 3D printer with 3T2R five-DOF (degrees of freedom)

A 3D printer, 3T2R technology, applied in the field of 3D printing, can solve the problem that the ladder effect cannot be completely eliminated, and achieve the effect of eliminating the ladder effect, improving the printing efficiency and improving the applicability

Inactive Publication Date: 2017-09-08
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing printers use multi-axis linkage to achieve curved surface molding by improving the printing accuracy, or take certain post-processing on the parts to reduce the impact of the step effect on the forming accuracy, but the step effect cannot be completely eliminated

Method used

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  • Rotary 3D printer with 3T2R five-DOF (degrees of freedom)
  • Rotary 3D printer with 3T2R five-DOF (degrees of freedom)
  • Rotary 3D printer with 3T2R five-DOF (degrees of freedom)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] like figure 1As shown, this embodiment adopts a two-layer four-head printing head layout, including: a printing head 4, a 3-PRS parallel mechanism 3, a coaxial first frame 14, a cylindrical frame 1 and a printing platform 2 , wherein: the surface array of the cylindrical surface frame 1 has two layers of 3-PRS parallel mechanisms 3, and the number of each layer is 4, the print head 4 is fixedly connected with the 3-PRS parallel mechanism 3, and the cylindrical surface frame 1 is connected with the first machine Frames 14 are set up and down and connected by cylindrical pairs. The printing platform 2 is set in the cylindrical frame 1 , and the corresponding printing platform 2 is fixedly connected with the first frame 14 .

[0040] like Figure 13 , 14 As shown in and 15, the 3-PRS parallel mechanism includes: a static platform 5, a support plate 11, a moving platform 6 and a single branch chain structure with a ball head 10, a connecting rod 9, a slide rail 7 and a sl...

Embodiment 2

[0045] like figure 2 As shown, this embodiment adopts a two-layer four-head printing head layout, including: a printing head 4, a 3-PRS parallel mechanism 3, a coaxial first frame 14, a cylindrical frame 1 and a printing platform 2 , wherein: the surface array of the cylindrical surface frame 1 has two layers of 3-PRS parallel mechanisms 3, and the number of each layer is 4, the print head 4 is fixedly connected with the 3-PRS parallel mechanism 3, and the cylindrical surface frame 1 is connected with the first machine Frames 14 are arranged up and down and connected by a rotating pair. The printing platform 2 is arranged in the cylindrical frame 1, and the corresponding printing platform 2 is connected with the first frame 14 by a moving pair.

[0046] Preferably, the cylindrical surface frame 1 is evenly distributed in the circumferential direction with a total of 8 circular arc surface gaps in the upper and lower layers, and each of the circular arc surface gaps is connect...

Embodiment 3

[0049] like image 3 As shown, this embodiment adopts a two-layer four-head printing head layout, including: a printing head 4, a 3-PRS parallel mechanism 3, a coaxial first frame 14, a cylindrical frame 1 and a printing platform 2 , wherein: the surface array of the cylindrical surface frame 1 has two layers of 3-PRS parallel mechanisms 3, and the number of each layer is 4, the print head 4 is fixedly connected with the 3-PRS parallel mechanism 3, and the cylindrical surface frame 1 is connected with the first machine The frames 14 are set up and down and fixedly connected between them, the printing platform 2 is set in the cylindrical frame 1, and the corresponding printing platform 2 and the first frame 14 are connected by a cylindrical pair.

[0050] Preferably, the cylindrical surface frame 1 is evenly distributed in the circumferential direction with a total of 8 circular arc surface gaps in the upper and lower layers, and each of the circular arc surface gaps is connect...

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Abstract

The invention relates to the technical field of 3D printing and provides a rotary 3D printer with 3T2R five-DOF (degrees of freedom). The printer comprises printing heads, 3-PRS parallel mechanisms, a first rack, a cylindrical rack and a printing platform, wherein the first rack, the cylindrical rack and the printing platform are arranged coaxially. The rotary 3D printer can be used for filling in the XY plane and manufacturing laminates in the Z direction, and can also be used for producing laminates along a radial slice of the rotary 3D printer, that is, the printing head performs printing up and down along the vertical contour curve, a cylindrical slice is filled, and once a layer is printed, the printer moves radially over one layer thickness (either from inside to outside, or from outside to inside, or in combination), so that the ladder effect of the large-curvature surface due to the original way along a Z-direction slice is effectively eliminated. The rotary 3D printer has the advantages that different structure arrangement modes can be selected according to structure and curved surface characteristics of different printouts, thereby realizing rapid manufacturing of parts with outer spatial curved surfaces, or inner spatial curved surfaces, or both outer spatial curved surfaces and inner spatial curved surfaces.

Description

technical field [0001] The present invention relates to a technology in the field of 3D printing, in particular to a 3T2R five-degree-of-freedom rotary 3D printer. Background technique [0002] Currently, 3D printers are mostly based on a Cartesian coordinate system. For the rapid manufacture of rotary parts and parts with curved features in the slice outline, the printer adopts the linkage of X and Y axes to fit and realize the curve drawing on the printing plane, and there is a certain error in the forming principle. Especially when printing rotary parts and parts with curved features in sliced ​​contours, the printing speed is slow, and the surface accuracy depends on the contour fitting accuracy of the algorithm. [0003] In the forming principle of laminated manufacturing, there is an error caused by the step effect, which is especially obvious when printing a curved surface in the vertical direction. Most of the existing printers improve the printing accuracy, adopt ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/20B29C64/205B29C64/241B33Y30/00
CPCB33Y30/00
Inventor 赵冬华郭为忠
Owner SHANGHAI JIAO TONG UNIV