Supporting structure for 3D printing and method for removing supporting structure

Abstract

The invention discloses a supporting structure for 3D printing and a method for removing the supporting structure. The supporting structure for 3D printing comprises multiple auxiliary supporting units, each auxiliary supporting unit comprises a supporting body, each supporting body is of a plate-shaped structure, connecting points are arranged on the top face, the bottom face and the side faces of each plate-shaped structure, and the two side faces of each plate-shaped structure are sunken towards the center position; a mass block is arranged at the center position of each plate-shaped structure, and hollowed-out parts are arranged at the non-center positions of the plate-shaped structures; and a powder outflow hole is formed between every two auxiliary supporting units connected through the connecting points on the side faces of the auxiliary supporting units. Multiple three-dimensional structures can be formed through the connecting points, so that different inherent frequencies of the auxiliary supporting structure are formed, the situation that the inherent frequencies of the auxiliary supporting structure and parts are the same can be avoided, the inherent frequencies of the auxiliary supporting structure are adjustable, and part resonance is avoided conveniently when the auxiliary supporting structure is removed. When the auxiliary supporting structure is removed, part internal stress can be effectively eliminated through vibration, and part stress release is convenient.

Description

technical field [0001] The invention belongs to the field of 3D printing, and specifically discloses a 3D printing support structure and a method for removing auxiliary supports through vibration. Background technique [0002] Additive manufacturing breaks the limitations of traditional manufacturing, enabling the realization of various structures that are difficult to achieve with traditional processing techniques. The existing additive manufacturing technologies mainly include powder spreading and wire feeding, and large-scale industrialized additive manufacturing mostly adopts powder spreading technology. In the field of additive manufacturing, powder coating and melting technology, especially in light-curing rapid prototyping technology, can process irregular structures, so it is widely used in the processing process, and irregular structures are mostly topological structures. Topological structures, overhanging structures, and hollow spaces, etc. In additive manufactur...

AI Technical Summary

Problems solved by technology

[0003] After the additive manufacturing process is completed, the auxiliary support needs to be removed. The external printing auxiliary support can be removed manually or with special equipment. The space between is narrow, the angle is inconvenient, and it is difficult to put the removal equipment in, so that the support in it cannot be removed or completely removed, thereby increasing the weight and performance of the part, making the additive manufacturing technology unable to play its advantages

It is necessary to clear the interlayer space and print the auxiliary support to ensure the function and function of the parts. Since the additive manufacturing technology cannot take advantage of its advantages because it cannot be removed, the printing auxiliary support has become a key technology, which increases the weight and performance of the parts.

[0004] Faced with the problem of how to remove the auxiliary support, the existing solutions are mostly degradation treatment, that is, to remove the auxiliary support through the dissolution of soluble materials, which cannot be realized in the powder-coating fusion technology, especially the additive manufacturing of light-curing rapid prototyping technology

Due to the additive manufacturing of powder-coating fusion technology, the selected materials are mostly high-temperature alloys and titanium alloys, and they are formed by high-energy light fusion materials. At the same time, due to the powder-coating technology, it is difficult to use soluble materials to print auxiliary supports. Therefore, through A method of removing secondary supports for soluble materials, difficult to achieve

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