CN-117445395-B - 3D printing variable-diameter rotary base station, 3D printing device and 3D printing method

CN117445395BCN 117445395 BCN117445395 BCN 117445395BCN-117445395-B

Abstract

The invention relates to a 3D printing variable-diameter rotary base, a 3D printing device and a 3D printing method. The rotary base comprises a first telescopic hinge ring structure and a second telescopic hinge ring structure, each telescopic hinge ring structure comprises a plurality of telescopic structure units which are sequentially arranged along the circumferential direction, and each telescopic structure unit comprises four connecting rods hinged together end to end. Each telescoping structural unit includes first and second circumferentially spaced apart hinge portions, and radially spaced apart outer and inner hinge portions. The adjacent corresponding hinge parts of any telescopic structure units are hinged together. The inner hinge part of one telescopic structure unit is also hinged with a first connecting rod, and the first connecting rod is hinged with a second connecting rod. The rotary base station also comprises a driving motor in transmission connection with the second connecting rod. Connecting rods are arranged between the outer hinge parts on the first telescopic hinge ring structure and the corresponding outer hinge parts on the second telescopic hinge ring structure. The rotary base station has high universality and is convenient for dismantling the model.

Inventors

ZHANG NAN
HU YALONG
GAO CHAOJUN
ZHANG QIANG
ZHENG GUOQIANG

Assignees

郑州大学

Dates

Publication Date: 20260512
Application Date: 20231107

Claims (10)

1. A3D printing variable-diameter rotary base is characterized by comprising a first telescopic hinge ring structure and a second telescopic hinge ring structure which are arranged in parallel at intervals and can synchronously rotate, wherein each telescopic hinge ring structure comprises a plurality of telescopic structure units which are sequentially arranged along the circumferential direction, each telescopic structure unit comprises four connecting rods, the end parts of any two adjacent connecting rods in the four connecting rods are hinged together to form a parallelogram connecting rod mechanism, each telescopic structure unit comprises a first hinge part and a second hinge part which are circumferentially spaced, each telescopic structure unit further comprises an outer hinge part and an inner hinge part which are radially spaced, the first hinge part of each telescopic structure unit is hinged with the second hinge part of the adjacent telescopic structure unit, the second hinge part of each telescopic structure unit is hinged with the first hinge part of the adjacent telescopic structure unit, the inner hinge part of one telescopic structure unit is further hinged with a first connecting rod, the other end of the first connecting rod is hinged with a second connecting rod, a motor shaft of the driving motor is hinged with the corresponding second connecting rod mechanism, each outer hinge ring part on the first hinge structure and each second hinge structure are in transmission connection, and each telescopic structure is formed between the outer hinge ring part and the second hinge part on the first hinge structure and the corresponding frame structure, and the first hinge structure is always arranged on the first hinge structure and the second hinge structure is formed, and 3D is formed on the telescopic structure when the first hinge structure is always in a printing mode.
2. The 3D printing variable diameter rotary base station of claim 1, wherein the first telescopic hinge ring structure and the second telescopic hinge ring structure comprise brackets, each bracket is provided with a cross-shaped guide rail, each cross-shaped guide rail comprises a first guide rail and a second guide rail, and each guide rail is used for guiding and moving and installing an outer hinge part and an inner hinge part of a corresponding telescopic structure unit.
3. The 3D printing variable diameter rotary base station of claim 2, wherein the support of the first telescopic hinge ring structure and the support of the second telescopic hinge ring structure are connected together through a fixed rod so as to realize synchronous rotation of the support and the support.
4. The 3D printing variable diameter rotating base according to claim 1, wherein the parallelogram linkage is of a diamond-shaped linkage structure.
5. The 3D printing variable-diameter rotary base station of claim 1, wherein the first connecting rod and the second connecting rod are both positioned in a space surrounded by each telescopic structure unit, and the driving motor is positioned in the center position in the space.
6. A3D printing device comprises a device frame, wherein a rotating base with a horizontal rotating axis is arranged on the device frame, and a 3D printing nozzle horizontally moving along the rotating axis direction of the rotating base is arranged on the device frame.
7. A 3D printing method applied to the 3D printing device according to claim 6, characterized in that the method comprises the following steps: 1) Calculating the diameter D of the required rotating base according to the size of the printed model; 2) The second connecting rod, the first connecting rod and the telescopic units of the telescopic hinge ring structures are driven to deform by controlling the rotation angle of a motor shaft of the driving motor, so that the diameter of the cylindrical surface where the connecting rod of each telescopic hinge ring structure is positioned reaches the diameter D required by the step 1), and each connecting rod forms a skeleton structure; 3) 3D printing is carried out on the framework structure in the step 2), so that a cylindrical rotating base surface is obtained; 4) 3D printing and forming are carried out on the surface of the cylindrical rotary base in the step 3); 5) And after the 3D printing is finished, controlling the driving motor to enable the rotary base station to shrink, and disassembling the printed model.
8. The 3D printing method according to claim 7, wherein the cylindrical rotary abutment surface in step 3) is obtained by: a) Winding a skeleton structure formed on the connecting rod in a winding manner by controlling the 3D printing nozzle to form an initial skin structure; B) Then printing a side standing wall structure on each plane of the initial skin structure between the connecting rods to form a new skeleton structure; C) Repeating the step A), or repeating the steps A), B) and A) until a cylindrical rotating base surface is obtained.
9. The method of 3D printing according to claim 8, wherein in step B) the height h of the side wall is calculated by first calculating the vertical distance D between the plane of the side wall on the initial skin structure to be printed and the axis of the rotating base and the distance R between the edge of any adjacent two planes on the initial skin structure at the junction and the axis of the rotating base by the formula h=R-D.
10. The method of 3D printing according to claim 8, wherein the width of the side wall structure is 1 printing path of the 3D printing nozzle, and is obtained by printing layer by layer.

Description

3D printing variable-diameter rotary base station, 3D printing device and 3D printing method Technical Field The invention relates to the technical field of 3D printing, in particular to a 3D printing variable-diameter rotary base station, a 3D printing device using the base station and a 3D printing method. Background 3D printing technology, also known as "additive manufacturing technology," is an emerging manufacturing technology that builds materials layer by layer to create a solid body based on a digital model. With the continuous development of 3D printing technology, in order to improve 3D printing forming efficiency, mechanical properties, surface finish and the like of formed parts, a forming mode of a 3D printing device and a 3D printing device are continuously innovated, and a 3D printing forming method based on a rotating platform is typical. For example, chinese patent application with publication number CN 116277958A discloses a 3D printing forming method and device based on linear light source, the device uses a rotary base as a rotary printing platform, and finishes feeding of layer-by-layer resin material through a rotary base structure and a scraper structure, and simultaneously realizes curing of the current layer resin material by using UV linear light source. Compared with the traditional photocuring forming method, the method improves the forming efficiency of photocuring 3D printing innovatively by optimizing the photocuring forming step, avoids the link that each layer needs to carry out scraper operation reciprocating motion, reduces the hardware cost of equipment on the premise of guaranteeing the forming precision by adopting a linear light source structure, and can realize curved surface printing so as to improve the mechanical property of a printing model. The method using the rotary cylinder base as the rotary printing platform is a 3D printing method which is commonly used at present and can be used for manufacturing the rotating body with a certain inner diameter, but the method can only be applied to a rotating body with a fixed inner diameter, and can not realize that one rotary base can be used for manufacturing the rotating body with various inner diameter requirements in a 3D printing way, so that the applicability and the universality are poor. In addition, after the 3D printing is finished, the printed model can cover the outer peripheral surface of the rotary cylinder base completely, so that the printed model is very difficult to disassemble and inconvenient to use. Disclosure of Invention The invention aims to provide a 3D printing variable-diameter base station to solve the problems of poor universality and inconvenient disassembly of a printing model in the prior art, and provides a 3D printing device using the base station, and further aims to provide a 3D printing method applied to the 3D printing device. The 3D printing variable-diameter base station adopts the following technical scheme that the 3D printing variable-diameter rotary base station comprises a first telescopic hinge ring structure and a second telescopic hinge ring structure which are arranged in parallel at intervals and can synchronously rotate, each telescopic hinge ring structure comprises a plurality of telescopic structure units which are sequentially arranged along the circumferential direction, each telescopic structure unit comprises four connecting rods, the end parts of any two adjacent connecting rods in the four connecting rods are hinged together to form a parallelogram connecting rod mechanism, each telescopic structure unit comprises a first hinge part and a second hinge part which are circumferentially spaced, each telescopic structure unit further comprises an outer hinge part and an inner hinge part which are radially spaced, the first hinge part of any telescopic structure unit is hinged with the second hinge part of the adjacent telescopic structure unit, the inner hinge part of one telescopic structure unit is also hinged with a first connecting rod, the other end of the first connecting rod is hinged with a second connecting rod, the selecting base station further comprises a motor, the motor drives the chain ring and the first hinge rod are arranged on the first hinge ring and the second hinge rod, and the first hinge rod is arranged on the first hinge rod and the first hinge rod is always corresponding to the first hinge structure when the first hinge is arranged on the first hinge ring and the second hinge structure, and the first hinge rod is formed on the 3D printing frame, and the telescopic structure is formed and the corresponding to the first hinge joint is arranged on the first hinge part when the first hinge structure and the first hinge structure is moved along the diameter direction. The first telescopic hinge ring structure and the second telescopic hinge ring structure comprise brackets, each bracket is provided with a cross-shaped guide rail, each cross-shape