Semi-open high-temperature rotary printing device and process

Abstract

A kind of based on semi-open high-temperature rotary printing device and process, including motor, motor is fixed on motor frame, motor output shaft is connected with rotary printing device via shaft coupling, rotary printing device is supported between first bearing seat and second bearing seat, first bearing seat, second bearing seat and first base, second base are connected, first base, second base are connected in the left and right ends of platform;Rotary printing device is sleeved with heating device, heating device is connected on platform;The present application creates semi-open low-cost easy-to-dismount high-temperature printing environment by annular infrared heating lamp, to reduce the temperature difference between extrusion molten material and formed material, improve interlayer performance, improve the forming quality of rotary parts.

Description

Technical Field

[0001] This invention belongs to the field of 3D printing technology, specifically relating to a semi-open high-temperature rotary printing device and process. Background Technology

[0002] With the rapid development of 3D printing technology, its application scope has gradually expanded to various fields such as aerospace. There are a large number of rotating structures in aerospace vehicles. According to the needs of the service environment, the structure needs to be resistant to high temperature and corrosion while meeting the requirements of lightweight. High-performance semi-crystalline polymers, represented by polyetheretherketone, polyetherketoneketone, and polyphenylene sulfide, are gradually becoming the preferred materials in the field of high-performance 3D printing. These materials have excellent high-temperature stability and mechanical properties, and are suitable for manufacturing parts used in extreme working environments. Due to their high melting point, these high-temperature resistant high-performance thermoplastic resin materials need to be printed in a high-temperature environment to reduce the temperature gradient of each layer and enhance the interlayer bonding performance.

[0003] Traditional high-temperature planar printing technology can only perform high-temperature printing in the horizontal direction. The heat source often adopts cavity preheating or base plate heating, resulting in large heat loss. It cannot effectively reduce the temperature difference between the extruded molten material and the formed material. For some complex-shaped rotating parts, it is necessary to print in batches and assemble them multiple times, which poses certain limitations when manufacturing complex rotating parts.

[0004] Rotary printing technology can print in multiple directions, thus reducing or eliminating support structures and enabling the one-time forming of complex rotating parts. While existing rotary printing technology (Xi'an Jiaotong University. A continuous fiber 3D printer capable of printing on the inner wall of a rotating cylinder: CN202210033727.4 [P]. 2022-04-26.) has certain advantages in meeting the manufacturing requirements of rotating parts, its application is limited by the material properties under high-temperature environments. Currently, due to the lack of printing devices suitable for high-temperature environments, rotary printing technology has significant shortcomings in handling high-temperature material printing. This limitation severely restricts the application of rotary printing technology in the aerospace field and hinders its development in the manufacturing of high-performance components. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the present invention aims to provide a semi-open high-temperature rotary printing device and process, which uses a ring-shaped infrared heating lamp to create a semi-open, low-cost, and easily disassembled high-temperature printing environment, thereby reducing the temperature difference between the extruded molten material and the formed material, improving interlayer performance, and improving the forming quality of rotary parts.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A semi-open high-temperature rotary printing device includes a motor 1, which is fixed on a motor frame 2. The output shaft of the motor 1 is connected to a rotary printing device 5 via a coupling 3. The rotary printing device 5 is supported between a first bearing seat 4 and a second bearing seat 6. The first bearing seat 4, the second bearing seat 6, the first base 10, and the second base 7 are connected to each other. The first base 10 and the second base 7 are connected to the left and right ends of a platform 8. A heating device 9 is fitted on the rotary printing device 5 and is connected to the platform 8.

[0008] The rotary printing device 5 includes an optical shaft 57, which is installed between the first bearing seat 4 and the second bearing seat 6 and connected to the coupling 3. A first positioning block 55 and a second positioning block 58 are connected to the optical shaft 57. A cylindrical mold formed by multiple arc molds is fixed to the first positioning block 55 and the second positioning block 58 by screws.

[0009] The heating device 9 includes a first optical axis 916 and a second optical axis 901 respectively installed on the front and rear sides of the platform 8 via positioning plates; a first slider 917 and a second slider 915 are connected to the first optical axis 916, and a third slider 903 and a fourth slider 908 are installed on the second optical axis 901; a ring-shaped first heating lamp 905 is connected to the first slider 917 and the third slider 903 via a connecting plate, and a ring-shaped second heating lamp 911 is connected to the second slider 915 and the fourth slider 908 via a connecting plate.

[0010] The annular first heating lamp tube 905 is provided with an annular first lamp cover 906 on its outer side, and the annular second heating lamp tube 911 is provided with an annular second lamp cover 910 on its outer side.

[0011] A process utilizing a semi-open high-temperature rotary printing device includes the following steps:

[0012] 1) Paste white paper and PEI film onto the arc mold in sequence;

[0013] 2) Select the appropriate print head according to the printing requirements and install it directly above the rotary printing device 5;

[0014] 3) Adjust the distance between the first annular heating lamp 905 and the second annular heating lamp 911 according to the size and material properties of the parts;

[0015] 4) Adjust the speed of motor 1 according to the printing requirements to drive the rotary printing device 5 to rotate;

[0016] 5) Set the target temperature and preheat the rotary printing device 5 using the first annular heating lamp 905 and the second annular heating lamp 911;

[0017] 6) Measure the temperature of the rotary printing device 5 and transmit the measured data to the temperature control device. Use PID adjustment to control the preheating temperature to reach the target temperature.

[0018] 7) The print head extrudes molten material onto the rotary printing device 5 to print the desired parts;

[0019] 8) Measure the temperature of the printing area and transmit the measured data to the temperature control device in real time. Extract the temperature history and process characteristics and input them into the neural network feedback model. Output the feedback heating power and process it for the next layer of processing.

[0020] 9) After printing is completed, remove the first annular lamp cover 906 and the second annular lamp cover 910 in sequence. Remove the screws of the arc mold and the two positioning blocks and pull them out axially. Remove the second bearing seat 6 and pull out the printed parts to complete the demolding.

[0021] 10) After removing the PEI film and white paper pasted inside the part, perform the finishing operation and reinstall the second bearing seat 6 and the arc mold into place;

[0022] 11) Repeat steps 1) to 10) to print the next part.

[0023] The temperature history in step 8) is the change in temperature of the forming material over time during the printing process; the process characteristics are the scanning spacing, layer thickness, and printing height; the neural network feedback model evaluates the current printing status based on the processed temperature data, and the heating power of the next layer is adaptively adjusted according to the surface temperature of the printing area.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] This invention, through its overall structural design, uses a ring-shaped first heating lamp 905 and a ring-shaped second heating lamp 911 to preheat and continuously maintain the temperature of the rotary mold. This reduces the temperature difference between the extruded molten material and the cooled forming material when printing materials with high melting points, improving the printed surface quality and interlayer performance. Furthermore, it allows for arbitrary arrangement and design of the printing path along the circumferential surface, greatly enhancing design and manufacturing flexibility and reducing manufacturing costs. By using a split mold, the difficulty of demolding is significantly reduced, providing a new approach for the rapid manufacturing of high-performance rotary parts. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the rotary printing device according to an embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of the heating device according to an embodiment of the present invention. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the embodiments and accompanying drawings.

[0030] Reference Figure 1 A semi-open high-temperature rotary printing device includes a motor 1, which is fixed on a motor frame 2. The output shaft of the motor 1 is connected to a rotary printing device 5 via a coupling 3. The rotary printing device 5 is supported between a first bearing seat 4 and a second bearing seat 6. The first bearing seat 4, the second bearing seat 6, the first base 10, and the second base 7 are connected to each other. The first base 10 and the second base 7 are connected to the left and right ends of a platform 8. A heating device 9 is fitted on the rotary printing device 5 and is connected to the platform 8.

[0031] This embodiment provides a semi-open high-temperature rotary printing device that can be placed on optical platforms or other working platforms and used in various environments. The rotary printing device 5 is equipped with various different print heads to realize high-temperature rotary 3D printing of multiple material systems, thus broadening the application range.

[0032] Reference Figure 2 The rotary printing device 5 includes an optical shaft 57, which is installed between the first bearing seat 4 and the second bearing seat 6 and connected to the coupling 3. A first positioning block 55 and a second positioning block 58 are connected to the optical shaft 57. A first arc mold 51, a second arc mold 52, a third arc mold 53, and a fourth arc mold 54 are fixed to the first positioning block 55 and the second positioning block 58 by screws. The first arc mold 51, the second arc mold 52, the third arc mold 53, and the fourth arc mold 54 form a complete cylindrical mold.

[0033] In this embodiment, the first arc mold 51, the second arc mold 52, the third arc mold 53, and the fourth arc mold 54 are made of stainless steel. The assembled cylindrical mold has a diameter of 170mm and can print rotary parts with an inner diameter of 170mm.

[0034] Reference Figure 3 The heating device 9 includes a first positioning plate 914 and a second positioning plate 902. The first positioning plate 914 and the second positioning plate 902 are respectively installed on the front and rear sides of the platform 8. A first optical axis 916 is installed on the two first positioning plates 914. A first slider 917 and a second slider 915 are connected to the first optical axis 916. A first connecting plate 918 and a second connecting plate 913 are respectively installed on the first slider 917 and the second slider 915.

[0035] A second optical axis 901 is installed on two second positioning plates 902. A third slider 903 and a fourth slider 908 are installed on the second optical axis 901. A third connecting plate 904 and a fourth connecting plate 909 are respectively installed on the third slider 903 and the fourth slider 908.

[0036] The first connecting plate 918 and the third connecting plate 904 are connected and fixed by the fifth connecting plate 907, and the second connecting plate 913 and the fourth connecting plate 909 are connected and fixed by the sixth connecting plate 912.

[0037] An annular first lampshade 906 is installed on the side of the first connecting plate 918 and the third connecting plate 904, and an annular first heating lamp tube 905 inside the annular first lampshade 906 is stuck between the first connecting plate 918 and the third connecting plate 904; an annular second lampshade 910 is installed on the side of the second connecting plate 913 and the fourth connecting plate 909, and an annular second heating lamp tube 911 inside the annular second lampshade 910 is stuck between the second connecting plate 913 and the fourth connecting plate 909.

[0038] In this embodiment, the first heating lamp 905 and the second heating lamp 911 are 1200W carbon fiber heating lamps with a diameter of 250mm. The distance between the first slider 917, the third slider 903 and the second slider 915 and the fourth slider 908 can be flexibly adjusted according to the size of the printed parts to control the size of the high-temperature printing area. The first lamp cover 906 and the second lamp cover 910 are used to concentrate heat on the printing area.

[0039] A process utilizing a semi-open high-temperature rotary printing device includes the following steps:

[0040] 1) Paste white paper and PEI film onto the first arc mold 51, the second arc mold 52, the third arc mold 53, and the fourth arc mold 54 in sequence;

[0041] 2) Select the appropriate print head according to the printing requirements and install it directly above the rotary printing device 5;

[0042] 3) Adjust the distance between the first annular heating lamp 905 and the second annular heating lamp 911 according to the size and material properties of the parts;

[0043] 4) Adjust the speed of motor 1 according to the printing requirements to drive the rotary printing device 5 to rotate;

[0044] 5) Set the target temperature and preheat the rotary printing device 5 using the first annular heating lamp 905 and the second annular heating lamp 911;

[0045] 6) Measure the temperature of the rotary printing device 5 and transmit the measured data to the temperature control device. Use PID adjustment to control the preheating temperature to reach the target temperature.

[0046] 7) The print head extrudes molten material onto the rotary printing device 5 to print the desired parts;

[0047] 8) Measure the temperature of the printing area and transmit the measured data to the temperature control device in real time. Extract the temperature history and process characteristics and input them into the neural network feedback model. Output the feedback heating power and process it for the next layer of processing.

[0048] 9) After printing is completed, remove the first annular lamp cover 906 and the second annular lamp cover 910 in sequence. Remove the screws of the four arc molds and the two positioning blocks and pull them out along the axis. Remove the second bearing seat 6 and pull out the printed parts to complete the demolding.

[0049] 10) After removing the PEI film and white paper pasted inside the part, perform the finishing operation and reinstall the second bearing seat 6 and the arc mold into place;

[0050] 11) Repeat steps 1) to 10) to print the next part.

[0051] The temperature history in step 8) is the change in temperature of the forming material over time during the printing process; the process characteristics are the scanning spacing, layer thickness, and printing height; the neural network feedback model evaluates the current printing status based on the processed temperature data, and the heating power of the next layer is adaptively adjusted according to the surface temperature of the printing area.

[0052] In this embodiment, the annular first heating lamp 905 and the annular second heating lamp 911 heat the cylindrical mold with a diameter of 170mm assembled from the first arc mold 51, the second arc mold 52, the third arc mold 53, and the fourth arc mold 54. The annular first lamp cover 906 and the annular second lamp cover 910 can effectively isolate the temperature of the heating zone from the temperature of other 3D printed parts. According to the material requirements of rotary parts, a suitable print head is selected for printing on the rotary printing device 5. The heating range is flexibly set according to the size of the printed part by adjusting the first slider 917 and the second lamp cover 911. The distance between the three sliders 903 and the second slider 915 and the fourth slider 908 controls the distance between the annular first heating lamp 905 and the annular second heating lamp 911. During the printing process, the annular first heating lamp 905 and the annular second heating lamp 911 remain stationary relative to the ground. The motor 1 drives the optical shaft 57 to rotate through the coupling 3. The first positioning block 55 and the second positioning block 58, which are fixed on the optical shaft 57, drive the first arc mold 51, the second arc mold 52, the third arc mold 53, and the fourth arc mold 54 to rotate. The print head extrudes molten material above the rotary printing device 5 to complete high-temperature rotary printing.

[0053] After printing, remove the first annular lampshade 906 and the second annular lampshade 910. Unscrew the screws of the first arc mold 51, the second arc mold 52, the third arc mold 53, the fourth arc mold 54, the first positioning block 55, and the second positioning block 58. Pull out the four arc molds one by one. Unscrew the screws in the first bearing seat 4 and the first base 10. Pull out the printed rotary part from the tail end of the optical axis 57 to complete the demolding process. After the component is removed, screw the screws between the first bearing seat 4 and the first base 10 back into place. Place the first arc mold 51, the second arc mold 52, the third arc mold 53, and the fourth arc mold 54 back in place and fix them with screws. Then, proceed with the printing of the next rotary part.

Claims

1. A semi-open high-temperature rotary printing device, comprising a motor (1), characterized in that: The output shaft of the motor (1) is connected to the rotary printing device (5) via a coupling (3). The rotary printing device (5) is supported between the first bearing seat (4) and the second bearing seat (6). The first bearing seat (4), the second bearing seat (6), the first base (10), and the second base (7) are connected. The first base (10) and the second base (7) are connected to both ends of the platform (8). A heating device (9) is fitted on the rotary printing device (5). The heating device (9) is connected to the platform (8). The rotary printing device (5) includes an optical shaft (57), which is installed between the first bearing seat (4) and the second bearing seat (6) and connected to the coupling (3). A first positioning block (55) and a second positioning block (58) are connected on the optical shaft (57). A cylindrical mold formed by multiple arc molds is fixed on the first positioning block (55) and the second positioning block (58). The heating device (9) includes a first optical axis (916) and a second optical axis (901) respectively installed on the front and rear sides of the platform (8) via positioning plates; a first slider (917) and a second slider (915) are connected on the first optical axis (916), and a third slider (903) and a fourth slider (908) are installed on the second optical axis (901); a ring-shaped first heating lamp (905) is connected to the first slider (917) and the third slider (903) via connecting plates, and a ring-shaped second heating lamp (911) is connected to the second slider (915) and the fourth slider (908) via connecting plates.

2. The semi-open high-temperature rotary printing device according to claim 1, characterized in that: The annular first heating lamp tube (905) is provided with an annular first lamp cover (906) on the outside, and the annular second heating lamp tube (911) is provided with an annular second lamp cover (910) on the outside.

3. The process using a semi-open high-temperature rotary printing device according to any one of claims 1-2, characterized in that, Includes the following steps: 1) Paste white paper and PEI film onto the arc mold in sequence; 2) Select the appropriate print head according to the printing requirements and install it directly above the rotary printing device (5); 3) Adjust the distance between the first annular heating lamp (905) and the second annular heating lamp (911) according to the size and material properties of the parts; 4) Adjust the speed of motor (1) according to the printing requirements to drive the rotary printing device (5) to rotate; 5) Set the target temperature and preheat the rotary printing device (5) using the first annular heating lamp (905) and the second annular heating lamp (911); 6) Measure the temperature of the rotary printing device (5) and transmit the measured data to the temperature control device. Use PID adjustment to control the preheating temperature so that it reaches the target temperature. 7) The print head extrudes molten material onto the rotary printing device (5) to print the required parts; 8) Measure the temperature of the printing area and transmit the measured data to the temperature control device in real time. Extract the temperature history and process characteristics and input them into the neural network feedback model. Output the feedback heating power and process it for the next layer of processing. 9) After printing is completed, remove the first ring lamp cover (906) and the second ring lamp cover (910) in sequence. Remove the screws of the arc mold and the two positioning blocks and pull them out along the axis. Remove the second bearing seat (6) and pull out the printed parts to complete the demolding. 10) After removing the PEI film and white paper pasted inside the part, perform the finishing operation and put the second bearing seat (6) and the arc mold back into place; 11) Repeat steps 1) to 10) to print the next part.

4. The process according to claim 3, characterized in that: The temperature history in step 8) is the change in temperature of the forming material over time during the printing process; The process characteristics are scanning spacing, layer thickness, and printing height; The neural network feedback model evaluates the current printing status based on the processed temperature data, and the heating power of the next layer is adaptively adjusted according to the surface temperature of the printed area.

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