A method for preparing a low-warp high-precision 3D printed product based on a polyaryletherketone material

Abstract

The application discloses a kind of preparation methods of low warping high-precision 3D printing products based on polyaryletherketone material, its preparation process includes: first, with PEEK resin and PEKK resin as matrix resin, carbon fiber is reinforced phase and is constructed with melting temperature gradient 3D printing wire;Second, according to the three-dimensional drawing of product, the blank of product is printed using high-temperature 3D printing equipment, and the dimensional accuracy of blank is controlled within ±0.1mm;Then further machining is carried out on blank by precision CNC milling machine using small feed and high speed cutting mode, and two annealing treatments are carried out during processing, so that a kind of low warping high-precision 3D printing product is obtained.The method of the application is suitable for rapid verification of small batch PAEK products, has high economic efficiency, strong production predictability, high work efficiency and other irreplaceable advantages in small batch production, especially in the field of small batch and multi-variety PAEK parts development has wide application prospect.

Description

Technical Field

[0001] This invention belongs to the field of additive manufacturing technology, specifically relating to a method for preparing low-warpage, high-precision 3D printed products based on polyaryletherketone materials. Background Technology

[0002] Polyaryletherketone (PAEK) is a high-temperature thermoplastic with a high glass transition temperature and melting point. After modification with glass fiber or carbon fiber, its heat distortion temperature under load can reach up to 325℃, allowing it to be used for a long time at high temperatures. Compared with other high-temperature plastics such as PI, PPS, and PPO, its upper limit of operating temperature is nearly 50℃ higher. In addition to its high-temperature resistance, PAEK resin has the following advantages over other plastics: 1. It has high rigidity, good dimensional stability, and a low coefficient of linear expansion, very close to that of aluminum; 2. It has excellent chemical resistance. Among common chemicals, only concentrated sulfuric acid can dissolve or destroy it. Its corrosion resistance is similar to that of nickel steel. It is also flame-retardant, releasing little smoke and toxic gas under flame conditions, and has strong radiation resistance; 3. PAEK resin has good toughness, and its excellent fatigue resistance to alternating stress is the best among all plastics, comparable to alloy materials; 4. It has outstanding tribological properties, excellent resistance to sliding wear and fretting wear, especially maintaining high wear resistance and a low coefficient of friction at high temperatures; 5. It is easy to extrude and injection mold, with excellent processing performance and high molding efficiency; 6. It has good self-lubricating properties, is easy to process, has stable insulation, and is resistant to hydrolysis. Due to its excellent comprehensive properties, PAEK material has become the most widely used high-performance engineering plastic. Traditional PAEK products are mainly manufactured using injection molding. However, the production time for injection molds is long and the cost is high, which is very disadvantageous for the development of small-batch products.

[0003] 3D printing technology (also known as rapid prototyping) emerged in the late 1980s and early 1990s, and has only been around for about 30 years. Its principle is to construct objects layer by layer using powdered metal or plastic and other bondable materials, taking a 3D digital model file as input. Compared to traditional subtractive manufacturing (such as machining) and equal-material manufacturing (such as casting, forging, and welding), 3D printing additive manufacturing shrinks complex manufacturing systems into a single piece of equipment, offering irreplaceable advantages such as high design freedom, high economic efficiency for small-batch production, strong production predictability, and high work efficiency. It will become the only means of realizing product personalization and the manufacturing of complex structural parts. However, in existing technologies, PAEK products prepared using 3D printing technology are prone to warping during the curing process, severely affecting the molding accuracy and failing to meet requirements. Summary of the Invention

[0004] To address the technical problem of warping during the curing process of PAEK products prepared using 3D printing technology in the prior art, this invention proposes a method for preparing low-warping, high-precision 3D printed products based on polyaryletherketone (PAEK) materials, thereby producing PAEK products with low warping and high dimensional accuracy.

[0005] One of the objectives of this invention is to provide a method for preparing low-warpage, high-precision 3D printed articles based on polyaryletherketone materials, specifically employing the following technical solution:

[0006] A method for preparing low-warpage, high-precision 3D printed articles based on polyaryletherketone materials includes the following steps:

[0007] Step 1: PEEK resin, PEKK resin and carbon fiber are mixed evenly and then melt-extruded and granulated by a twin-screw extruder to obtain blended particles;

[0008] Step 2: The blended particles obtained in Step 1 are extruded, shaped, and wound up using a filament machine to obtain 3D printing filament;

[0009] Step 3: Use a 3D printing device to thermally print the 3D printing filament obtained in Step 2 to obtain a product blank.

[0010] Step 4: Machining the product blank obtained in Step 3 using a precision CNC milling machine to obtain a semi-finished product;

[0011] Step 5: Position and clamp the semi-finished product obtained in Step 4 using a tooling fixture, heat the semi-finished product to 200-230°C and keep it there for 2 hours, then let the semi-finished product cool naturally to 150-170°C and keep it there for another 2 hours, and finally let the semi-finished product cool naturally to room temperature to obtain the finished product.

[0012] Furthermore, in step 1, the weight percentages of PEEK resin, PEKK resin, and carbon fiber are (40-60)%: (30-50)%: 10%.

[0013] Furthermore, the melting point of the PEEK resin is 343°C, and the melting point of the PEKK resin is 332°C.

[0014] Furthermore, the diameter of the 3D printing filament in step 2 is 1.75 mm.

[0015] Furthermore, in step 3, before thermally printing the 3D printing filament obtained in step 2 using the 3D printing equipment, the 3D printing filament, the printing nozzle of the 3D printing equipment, and the heated bed are preheated.

[0016] Furthermore, during the thermal printing process in step 3, the temperature of the 3D printing nozzle is 400°C, and the chamber temperature is not lower than 200°C.

[0017] Furthermore, in step 3, the dimensional accuracy of the product blank is controlled within ±0.1mm during the thermal printing process.

[0018] Furthermore, the machining process in step 4 involves a small feed rate and a high rotational speed.

[0019] Furthermore, in step 5, the finished product's dimensional accuracy is ≤ ±0.03 mm, and its flatness is ≤ 0.1 mm.

[0020] The second objective of this invention is to provide a support product, specifically employing the following technical solution:

[0021] A scaffold product is manufactured using any of the above-mentioned methods for preparing low-warpage, high-precision 3D printed products based on polyaryletherketone materials.

[0022] The beneficial effects of this invention are:

[0023] 1. This invention uses semi-crystallized PEEK resin and PEKK resin with carbon fiber at different melting temperatures to prepare 3D printing filaments. This can effectively control the crystallization speed of the 3D printing filaments, thereby improving the warping deformation of the material. At the same time, since the resins used are all polyaryletherketone systems, the linear expansion coefficient of the 3D printed products is close to that of metals, thus ensuring that the 3D printed products can be metallized in the future and improving the compatibility of subsequent processing.

[0024] 2. This invention uses thermal printing to print 3D printing filaments, which can effectively ensure that no interlayer peeling occurs during subsequent machining, thus guaranteeing the effect of subsequent machining of the product.

[0025] 3. The machining process of this invention, which uses a small feed rate and high rotation speed, can effectively reduce the internal stress generated during machining, thereby reducing the deformation of the product during the machining stage. At the same time, combined with secondary annealing heat treatment, the residual internal stress of PAEK products can be further eliminated, effectively controlling the amount of deformation of the product, and producing PAEK products with low warpage and high dimensional accuracy. Detailed Implementation

[0026] This invention provides a method for preparing low-warpage, high-precision 3D printed products based on polyaryletherketone (PAEK) materials, thereby solving the technical problem that warpage easily occurs during the curing process when preparing PAEK products using 3D printing technology in the prior art.

[0027] The overall concept adopted in this invention is as follows:

[0028] This invention first uses semi-crystallized PEEK resin and PEKK resin with carbon fiber at different melting temperatures to prepare 3D printing filaments. This effectively controls the crystallization rate of the 3D printing filaments, thereby improving material warpage. In terms of process, the 3D printing filaments are first printed using thermal printing to prevent interlayer delamination during subsequent machining, ensuring the quality of the machined product. Secondly, a small feed rate and high rotation speed are used in the machining process to effectively reduce internal stress generated during machining, minimizing deformation. Finally, a secondary annealing heat treatment further eliminates residual internal stress in the PAEK product, effectively controlling deformation and producing PAEK products with low warpage and high dimensional accuracy. The specific technical solution is as follows:

[0029] A method for preparing low-warpage, high-precision 3D printed articles based on polyaryletherketone materials includes the following steps:

[0030] Step 1: PEEK resin, PEKK resin and carbon fiber are mixed evenly and then melt-extruded and granulated by a twin-screw extruder to obtain blended particles;

[0031] Step 2: The blended particles obtained in Step 1 are extruded, shaped, and wound up using a filament machine to obtain 3D printing filament; the diameter of the 3D printing filament is 1.75 mm.

[0032] Step 3: Use a 3D printing device to thermally print the 3D printing filament obtained in Step 2 to obtain a blank part; before thermal printing, the 3D printing filament, the printing nozzle of the 3D printing device, and the heated bed are preheated; during thermal printing, the temperature of the printing nozzle of the 3D printing device is 400℃, and the temperature of the chamber is not lower than 200℃; during thermal printing, the dimensional accuracy of the blank part is controlled within ±0.1mm.

[0033] Step 4: The blank obtained in Step 3 is machined using a precision CNC milling machine to obtain a semi-finished product; the machining process is characterized by small feed rate and high speed.

[0034] Step 5: Position and clamp the semi-finished product obtained in Step 4 using a tooling fixture, heat the semi-finished product to 200-230°C and keep it there for 2 hours, then let the semi-finished product cool naturally to 150-170°C and keep it there for another 2 hours, and finally let the semi-finished product cool naturally to room temperature to obtain the finished product.

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be described more clearly and completely below. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this invention pertains.

[0036] The terms "first," "second," and similar words used in the specification and claims of this patent application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "an," "a," or "the," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the features, integrals, steps, operations, elements, and / or components listed following "comprising" or "including," and do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0037] Example 1

[0038] A method for preparing low-warpage, high-precision 3D-printed scaffold products based on polyaryletherketone (PAK) material includes the following steps:

[0039] Step 1: Weigh 45% PEEK resin, 45% PEKK resin, and 10% carbon fiber by weight percentage, mix them evenly, and then melt-extrude and granulate them using a twin-screw extruder to obtain blended granules. The melting point of the PEEK resin is 343℃, and the melting point of the PEKK resin is 332℃.

[0040] Step 2: The blended particles obtained in Step 1 are extruded, shaped, and wound up using a filament machine to obtain 3D printing filament with a diameter of 1.75 mm.

[0041] Step 3: Start the 3D printing equipment and set the nozzle temperature to 400℃ and the chamber temperature to no less than 200℃. Preheat the 3D printing filament, the nozzle, and the heated bed. Then, print the blank of the support structure according to the drawings. To facilitate clamping by the tooling fixtures during subsequent machining, print a small boss on each of the four outer contours of the blank. During the thermal printing process, control the dimensional accuracy of the blank within ±0.1mm.

[0042] Step 4: Machining the bracket-type product blank obtained in Step 3 using a precision CNC milling machine to obtain a semi-finished bracket-type product; specifically, using the fixture on the precision CNC milling machine to fix the four bosses of the bracket-type product blank respectively, and then machining the front and back sides of the bracket-type product blank step by step with a small feed and high speed to remove excess dimensions.

[0043] Step 5: Use a tooling fixture to position and clamp the four protrusions on the semi-finished bracket product obtained in Step 4, heat the semi-finished bracket product to 200°C and keep it for 2 hours, then let the semi-finished bracket product cool naturally to 150°C and keep it for another 2 hours, and finally let the semi-finished bracket product cool naturally to room temperature and then cut off the four small protrusions to obtain the bracket product.

[0044] Example 2

[0045] A method for preparing low-warpage, high-precision 3D-printed scaffold products based on polyaryletherketone (PAK) material includes the following steps:

[0046] Step 1: Weigh 55% PEEK resin, 35% PEKK resin, and 10% carbon fiber by weight percentage, mix them evenly, and then melt-extrude and granulate them using a twin-screw extruder to obtain blended granules. The melting point of the PEEK resin is 343℃, and the melting point of the PEKK resin is 332℃.

[0047] Step 2: The blended particles obtained in Step 1 are extruded, shaped, and wound up using a filament machine to obtain 3D printing filament with a diameter of 1.75 mm.

[0048] Step 3: Start the 3D printing equipment and set the nozzle temperature to 400℃ and the chamber temperature to no less than 200℃. Preheat the 3D printing filament, the nozzle, and the heated bed. Then, print the blank of the support structure according to the drawings. To facilitate clamping by the tooling fixtures during subsequent machining, print a small boss on each of the four outer contours of the blank. During the thermal printing process, control the dimensional accuracy of the blank within ±0.1mm.

[0049] Step 4: Machining the bracket-type product blank obtained in Step 3 using a precision CNC milling machine to obtain a semi-finished bracket-type product; specifically, using the fixture on the precision CNC milling machine to fix the four bosses of the bracket-type product blank respectively, and then machining the front and back sides of the bracket-type product blank step by step with a small feed and high speed to remove excess dimensions.

[0050] Step 5: Use a tooling fixture to position and clamp the four protrusions on the semi-finished bracket product obtained in Step 4, heat the semi-finished bracket product to 230°C and keep it for 2 hours, then let the semi-finished bracket product cool naturally to 170°C and keep it for another 2 hours, and finally let the semi-finished bracket product cool naturally to room temperature and then cut off the four small protrusions to obtain the bracket product.

[0051] Example 3

[0052] A method for preparing low-warpage, high-precision 3D-printed scaffold products based on polyaryletherketone (PAK) material includes the following steps:

[0053] Step 1: Weigh 50% PEEK resin, 40% PEKK resin, and 10% carbon fiber by weight percentage, mix them evenly, and then melt-extrude and granulate them using a twin-screw extruder to obtain blended granules. The melting point of the PEEK resin is 343℃, and the melting point of the PEKK resin is 332℃.

[0054] Step 2: The blended particles obtained in Step 1 are extruded, shaped, and wound up using a filament machine to obtain 3D printing filament with a diameter of 1.75 mm.

[0055] Step 3: Start the 3D printing equipment and set the nozzle temperature to 400℃ and the chamber temperature to no less than 200℃. Preheat the 3D printing filament, the nozzle, and the heated bed. Then, print the blank of the support structure according to the drawings. To facilitate clamping by the tooling fixtures during subsequent machining, print a small boss on each of the four outer contours of the blank. During the thermal printing process, control the dimensional accuracy of the blank within ±0.1mm.

[0056] Step 4: Machining the bracket-type product blank obtained in Step 3 using a precision CNC milling machine to obtain a semi-finished bracket-type product; specifically, using the fixture on the precision CNC milling machine to fix the four bosses of the bracket-type product blank respectively, and then machining the front and back sides of the bracket-type product blank step by step with a small feed and high speed to remove excess dimensions.

[0057] Step 5: Use a tooling fixture to position and clamp the four protrusions on the semi-finished bracket product obtained in Step 4, heat the semi-finished bracket product to 220°C and keep it for 2 hours, then let the semi-finished bracket product cool naturally to 150°C and keep it for another 2 hours, and finally let the semi-finished bracket product cool naturally to room temperature and then cut off the four small protrusions to obtain the bracket product.

[0058] Comparative Example 1

[0059] A method for preparing a 3D printed scaffold-like product includes the following steps:

[0060] Step 1: Weigh 90% PEEK resin and 10% carbon fiber by weight percentage, mix them evenly, and then melt-extrude and granulate them using a twin-screw extruder to obtain blended granules. The melting point of the PEEK resin is 343℃, and the melting point of the PEKK resin is 332℃.

[0061] Step 2: The blended particles obtained in Step 1 are extruded, shaped, and wound up using a filament machine to obtain 3D printing filament with a diameter of 1.75 mm.

[0062] Step 3: Start the 3D printing equipment and set the nozzle temperature to 400℃ and the chamber temperature to no less than 200℃. Preheat the 3D printing filament, the nozzle, and the heated bed. Then, print the blank of the support structure according to the drawings. To facilitate clamping by the tooling fixtures during subsequent machining, print a small boss on each of the four outer contours of the blank. During the thermal printing process, control the dimensional accuracy of the blank within ±0.1mm.

[0063] Step 4: Machining the bracket-type product blank obtained in Step 3 using a precision CNC milling machine to obtain a semi-finished bracket-type product; specifically, using the fixture on the precision CNC milling machine to fix the four bosses of the bracket-type product blank respectively, and then machining the front and back sides of the bracket-type product blank step by step with a small feed and high speed to remove excess dimensions.

[0064] Step 5: Use a tooling fixture to position and clamp the four protrusions on the semi-finished bracket product obtained in Step 4, heat the semi-finished bracket product to 220°C and keep it for 2 hours, then let the semi-finished bracket product cool naturally to 150°C and keep it for another 2 hours, and finally let the semi-finished bracket product cool naturally to room temperature and then cut off the four small protrusions to obtain the bracket product.

[0065] The difference between this comparative example and Example 1 above is that only PEEK resin and carbon fiber are used as raw material components.

[0066] Comparative Example 2

[0067] A method for preparing low-warpage, high-precision 3D-printed scaffold products based on polyaryletherketone (PAK) material includes the following steps:

[0068] Step 1: Weigh 45% PEEK resin, 45% PEKK resin, and 10% carbon fiber by weight percentage, mix them evenly, and then melt-extrude and granulate them using a twin-screw extruder to obtain blended granules. The melting point of the PEEK resin is 343℃, and the melting point of the PEKK resin is 332℃.

[0069] Step 2: The blended particles obtained in Step 1 are extruded, shaped, and wound up using a filament machine to obtain 3D printing filament with a diameter of 1.75 mm.

[0070] Step 3: Start the 3D printing equipment and set the print head temperature to 400℃, while keeping the chamber temperature at room temperature. Preheat the 3D printing filament, the print head, and the heated bed. Then, print the blank of the support structure according to the drawings. To facilitate clamping by the tooling fixtures during subsequent machining, print a small boss on each of the four outer contours of the blank. During the thermal printing process, control the dimensional accuracy of the blank within ±0.1mm.

[0071] Step 4: Machining the bracket-type product blank obtained in Step 3 using a precision CNC milling machine to obtain a semi-finished bracket-type product; specifically, using the fixture on the precision CNC milling machine to fix the four bosses of the bracket-type product blank respectively, and then machining the front and back sides of the bracket-type product blank step by step with a small feed and high speed to remove excess dimensions.

[0072] Step 5: Use a tooling fixture to position and clamp the four protrusions on the semi-finished bracket product obtained in Step 4, heat the semi-finished bracket product to 220°C and keep it for 2 hours, then let the semi-finished bracket product cool naturally to 150°C and keep it for another 2 hours, and finally let the semi-finished bracket product cool naturally to room temperature and then cut off the four small protrusions to obtain the bracket product.

[0073] The difference between this comparative example and Example 1 above is that the chamber temperature of the 3D printer is room temperature.

[0074] Comparative Example 3

[0075] A method for preparing low-warpage, high-precision 3D-printed scaffold products based on polyaryletherketone (PAK) material includes the following steps:

[0076] Step 1: Weigh 45% PEEK resin, 45% PEKK resin, and 10% carbon fiber by weight percentage, mix them evenly, and then melt-extrude and granulate them using a twin-screw extruder to obtain blended granules. The melting point of the PEEK resin is 343℃, and the melting point of the PEKK resin is 332℃.

[0077] Step 2: The blended particles obtained in Step 1 are extruded, shaped, and wound up using a filament machine to obtain 3D printing filament with a diameter of 1.75 mm.

[0078] Step 3: Start the 3D printing equipment and set the nozzle temperature to 400℃ and the chamber temperature to no less than 200℃. Preheat the 3D printing filament, the nozzle, and the heated bed. Then, print the blank of the support structure according to the drawings. To facilitate clamping by the tooling fixtures during subsequent machining, print a small boss on each of the four outer contours of the blank. During the thermal printing process, control the dimensional accuracy of the blank within ±0.1mm.

[0079] Step 4: Machining the bracket-type product blank obtained in Step 3 using a precision CNC milling machine to obtain a semi-finished bracket-type product; specifically, using the fixture on the precision CNC milling machine to fix the four bosses of the bracket-type product blank respectively, and then machining the front and back sides of the bracket-type product blank step by step with a small feed and high speed to remove excess dimensions.

[0080] Step 5: Use a tooling fixture to position and clamp the four protrusions on the semi-finished bracket product obtained in Step 4, heat the semi-finished bracket product to 150°C and keep it there for 2 hours, and finally let the semi-finished bracket product cool naturally to room temperature before cutting off the four small protrusions to obtain the bracket product.

[0081] The difference between this comparative example and Example 1 above is that only one annealing process is performed.

[0082] Product dimensional accuracy testing

[0083] To verify the differences between the preparation methods of Examples 1-3 and Comparative Examples 1-3 of the present invention, samples with standard dimensions of 150 mm in length, 70 mm in width, and 5 mm in height were prepared according to the methods of the above examples and comparative examples. The dimensions of each sample were then measured, and the results are shown in the table below:

[0084] Table 1. Dimensional inspection data of each sample in the examples and comparative examples (unit: cm)

[0085] Standard size 150 70 5 flatness Example 1 150.02 70.01 4.99 0.07 Example 2 150.01 70.00 4.98 0.07 Example 3 149.98 70.02 5.01 0.08 Comparative Example 1 149.89 70.13 5.08 0.17 Comparative Example 2 149.93 70.06 5.05 0.12 Comparative Example 3 149.84 69.92 5.10 0.23

[0086] As shown in Table 1, the length, width, and height dimensions of the support products prepared using the method of this invention are all ≤ ±0.03 mm, and the flatness of the support products is ≤ 0.1. This indicates that the PEAK support products prepared by Example 1 of this invention have the characteristics of low warpage and high dimensional accuracy. In contrast, the support products prepared by Comparative Examples 1-3 all have an accuracy greater than ±0.03 mm, and their flatness is also higher than 0.1.

[0087] Finally, it should be noted that these embodiments are for illustrative purposes only and do not limit the scope of the invention. Furthermore, those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for preparing low-warpage, high-precision 3D printed articles based on polyaryletherketone materials, characterized in that, Includes the following steps: Step 1: PEEK resin, PEKK resin and carbon fiber are mixed evenly and then melt-extruded and granulated by a twin-screw extruder to obtain blended particles; Step 2: The blended particles obtained in Step 1 are extruded, shaped, and wound up using a filament machine to obtain 3D printing filament; Step 3: Use a 3D printing device to thermally print the 3D printing filament obtained in Step 2 to obtain a product blank. Step 4: Machining the product blank obtained in Step 3 using a precision CNC milling machine to obtain a semi-finished product; Step 5: Position and clamp the semi-finished product obtained in Step 4 using tooling fixtures, heat the semi-finished product to 200-230°C and keep it for 2 hours, then let the semi-finished product cool naturally to 150°C-170°C and keep it for another 2 hours, and finally let the semi-finished product cool naturally to room temperature to obtain the finished product. In step 1, the weight percentages of PEEK resin, PEKK resin, and carbon fiber are (40-60)% : (30-50)% : 10%. In step 3, during the thermal printing process, the temperature of the 3D printing nozzle is 400℃, and the temperature of the chamber is not lower than 200℃.

2. The method for preparing a low-warpage, high-precision 3D printed article based on polyaryletherketone material according to claim 1, characterized in that: The melting point of the PEEK resin is 343°C, and the melting point of the PEKK resin is 332°C.

3. The method for preparing a low-warpage, high-precision 3D printed article based on polyaryletherketone material according to claim 1, characterized in that: The diameter of the 3D printing filament in step 2 is 1.75 mm.

4. The method for preparing a low-warpage, high-precision 3D printed article based on polyaryletherketone material according to claim 1, characterized in that: In step 3, before thermally printing the 3D printing filament obtained in step 2 using the 3D printing equipment, the 3D printing filament, the printing nozzle of the 3D printing equipment, and the heated bed are preheated.

5. The method for preparing a low-warpage, high-precision 3D printed article based on polyaryletherketone material according to claim 1, characterized in that: In step 3, the dimensional accuracy of the product blank is controlled within ±0.1mm during the thermal printing process.

6. The method for preparing a low-warpage, high-precision 3D printed article based on polyaryletherketone material according to claim 1, characterized in that: The machining process in step 4 involves a small feed rate and a high rotational speed.

7. The method for preparing a low-warpage, high-precision 3D printed article based on polyaryletherketone material according to claim 1, characterized in that: In step 5, the finished product's dimensional accuracy is within ±0.03mm, and its flatness is ≤0.

1.

8. A type of support product, characterized in that: It is made using any of the preparation methods of low-warpage, high-precision 3D printed articles based on polyaryletherketone materials as described in claims 1-7.