Additive manufacturing scraper service life detection device, system and method

Abstract

The invention provides a device, system and method for detecting the service life of an additive manufacturing scraper, and the device comprises a bottom plate, a first lifting track structure, a second lifting track structure, a driving system, a connecting plate, a clamping mechanism, a nozzle, a laying substrate, a pressure sensor, a lifting structure, a camera support, and a camera. The first lifting track structure and the second lifting track structure are installed on the two sides of the bottom plate, can ascend and descend in the vertical direction and are provided with moving parts capable of moving in the horizontal direction, one end of the connecting plate is connected with the moving part of the first lifting track structure, and the other end of the connecting plate is connected with the moving part of the second lifting track structure. The driving system is connected with the first lifting track structure and the second lifting track structure, the top of the clamping mechanism is fixed to the lower surface of the connecting plate, a to-be-tested scraper is fixed to the lower portion of the clamping mechanism, the lifting structure is arranged on one side of the bottom plate, and a protrusion is arranged on the top of the laying base plate and arranged on the lifting structure. The pressure sensor is arranged between the laying base plate and the lifting structure. The method is higher in detection precision.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and in particular to an additive manufacturing scraper life detection device, system and method. Background Art

[0002] In modern manufacturing, improving production efficiency and product quality is an important goal. Additive Manufacturing Technologies (AM), also known as 3D printing (3DP), is a technology that manufactures physical parts based on three-dimensional CAD data by accumulating materials layer by layer. As an innovative manufacturing method, additive manufacturing technology is widely used in the manufacture of various complex parts. As a key component for powder laying, the wear of the additive manufacturing scraper directly affects the printing accuracy and the quality of the finished product. In order to ensure the efficient operation of the equipment and extend the service life of the scraper, it is particularly important to monitor the wear of the scraper in real time. However, the existing technology lacks a life detection device for 3D printing scrapers.

[0003] The patent application document with application number 201010167331.6 discloses a remanufactured parts surface coating accelerated wear life tester and its detection method, the tester includes a friction drive component, a degree of freedom loading component and a signal test collection component, and detects the life of the parts surface coating by friction. However, this tester is not suitable for scraper life detection. On the one hand, because the scraper is not simply friction loss, the scraper is the contact loss with the particles during the laying process, so the result obtained by directly using the tester for scraper life test is not accurate. Secondly, the scraper needs to handle a large amount of powder during laying and maintain a high frequency of material laying. The tester cannot adapt to this complex working condition. Summary of the invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide an additive manufacturing scraper life detection device, system and method with higher detection accuracy.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] A device for detecting the life of an additive manufacturing scraper comprises a base plate, a first lifting track structure, a second lifting track structure, a driving system, a connecting plate, a clamping mechanism, a nozzle, a laying substrate, a pressure sensor, a lifting structure, a camera bracket, and a camera, wherein the first lifting track structure and the second lifting track structure are installed on both sides of the base plate, the first lifting track structure and the second lifting track structure can be lifted and lowered in a vertical direction and are provided with a moving part that can be moved in a horizontal direction, one end of the connecting plate is connected to the moving part of the first lifting track structure, and the other end is connected to the moving part of the second lifting track structure, the driving system is respectively connected to the moving parts of the first lifting track structure and the second lifting track structure, and is used to drive the moving parts to move, the top of the clamping mechanism is fixed to the lower surface of the connecting plate, the scraper to be tested is fixed below the clamping mechanism, the nozzle is connected to the lower surface of the connecting plate and is opposite to the scraper to be tested, the lifting structure is arranged on one side of the base plate, the top of the laying substrate is provided with a protrusion and is arranged on the lifting structure, the pressure sensor is arranged between the laying substrate and the lifting structure, the camera bracket is placed on the other side of the base plate, and the camera is placed on the camera bracket.

[0007] Furthermore, the first lifting track structure includes a lifting platform, a connecting part, a track angle, a track, and a slider, wherein the lifting platform is placed on one side of the base plate, the connecting part is placed on the lifting platform, the track angle is fixed on the connecting part, the track is located in the track angle, and the slider as a moving part can move along the horizontal direction of the track.

[0008] Further, the second lifting track structure is the same as the second lifting track structure.

[0009] Furthermore, the drive system includes a motor, a coupling, and a rotating shaft, wherein the motor is connected to the rotating shaft via a coupling, and the rotating shaft is connected to the couplings built into the tracks on both sides, and the torque is transmitted to the slider via the internal coupling to drive the slider to move on the track.

[0010] Furthermore, the clamping mechanism includes an upper plate, a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate are vertically connected to the upper plate, and the scraper to be tested is fixed between the first clamping plate and the second clamping plate by a fixing mechanism.

[0011] Furthermore, the nozzle is connected to an air jet device.

[0012] Furthermore, the lifting structure includes an electric cylinder, a motor, and a support plate. The electric cylinder is installed on the base plate, the support plate is arranged on the top of the electric cylinder, and the motor is electrically connected to the electric cylinder to drive the electric cylinder to move up and down.

[0013] Furthermore, the base plate is provided with a first partition and a second partition placed vertically side by side, the first partition and the second partition divide the base plate into an experimental area, a cleaning area and a camera area, the lifting structure is arranged in the experimental area, and the camera bracket is arranged in the camera area.

[0014] A system for detecting the life of an additive manufacturing scraper, comprising:

[0015] A device for detecting the life of the above-mentioned additive manufacturing scraper;

[0016] A first lifting control device is used to control the lifting of the first lifting track structure and the second lifting track structure so that the scraper to be tested rises to a preset height;

[0017] A second lifting control device is used to control the lifting of the lifting structure so that the scraper to be tested is pressed onto the laying substrate during the experiment;

[0018] A drive control device, used to control the drive system, so that the scraper to be tested moves to the top of the laying substrate during the experiment, and reciprocates on the laying substrate to complete the powder spreading experiment on the laying substrate, and moves to the cleaning area when cleaning is required, and moves to the front of the camera when shooting is required;

[0019] The jet control device is used to control the switch of the nozzle so as to clean the powder on the scraper to be tested when necessary;

[0020] The life detection device is used to predict the life of the scraper to be tested by using a life prediction model based on the image of the scraper to be tested taken by a camera after a period of experiment and the pressure data collected by a pressure sensor, wherein the life prediction model is a machine learning model trained using several scraper images, pressure data and corresponding lifespans as samples.

[0021] A method for detecting the life of an additive manufacturing scraper, the method is based on the above-mentioned device for detecting the life of an additive manufacturing scraper, and the method comprises:

[0022] S1. placing the powder to be laid on a laying substrate;

[0023] S2, controlling the lifting and lowering of the first lifting track structure and the second lifting track structure so that the scraper to be tested rises to a preset height;

[0024] S3, controlling the driving system so that the scraper to be tested moves to be just above the laying substrate;

[0025] S4, controlling the lifting and lowering of the lifting structure so that the scraper to be tested is pressed onto the laying substrate;

[0026] S5, controlling the driving system so that the scraper to be tested moves back and forth on the laying substrate to complete the powder spreading experiment on the laying substrate;

[0027] S6, controlling the driving system to move the scraper to be tested to the cleaning area, and turning on the nozzle switch to clean the powder on the scraper to be tested;

[0028] S7, controlling the driving system to move the scraper to be tested to the front of the camera, and using the camera to take an image of the scraper to be tested;

[0029] S8. Based on the images of the scraper to be tested taken by the camera after a period of time and the pressure data collected by the pressure sensor, a life prediction model is used to predict the life of the scraper to be tested, wherein the life prediction model is a machine learning model trained using several scraper images, pressure data and corresponding lifespans as samples.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The scraper life detection device of the present invention can monitor the wear of the scraper in multiple powder laying experiments in real time through the combination of a pressure sensor and a camera, and provide accurate wear data. The high-resolution images captured by the camera can record the degree of wear of the scraper in detail to ensure the accuracy of the wear analysis. Combined with the data collected by the pressure sensor, it can be used to comprehensively evaluate the stress state and wear condition of the scraper, greatly improving the detection accuracy.

[0032] 2. The scraper life detection device of the present invention is designed with an automated slide rail system, and the scraper can automatically move between the experimental area, the cleaning area and the camera area, thereby reducing manual intervention, improving detection efficiency and increasing detection accuracy.

[0033] 3. The scraper life detection device of the present invention uses an electric cylinder to accurately control the gap between the scraper and the laying substrate to ensure the consistency of each experimental condition. In addition, the scraper moves to the cleaning area after each experiment, and the nozzle removes the residual powder through the airflow to ensure the clean state of the scraper in subsequent experiments. This cleaning process significantly improves the repeatability of the experimental results and ensures the reliability of the wear data.

[0034] 4. The scraper life detection system and method of the present invention can automatically analyze data and provide life prediction results by using machine learning algorithms to analyze wear data and mechanical data. Different from traditional detection methods, the present invention can warn the degree of scraper wear in advance, avoid the scraper from continuing to operate after reaching its use limit, reduce production problems caused by excessive scraper wear, and improve the initiative of equipment maintenance.

[0035] 5. The present invention is applicable to different types of 3D printing equipment and can detect the life of the scraper under various working conditions. By adjusting the electric cylinder and different types of laying substrates, the device can adapt to different printing materials and process conditions and has a wide range of application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a front structural schematic diagram of a device for detecting the life of an additive manufacturing scraper provided by an embodiment of the present invention;

[0037] Figure 2 It is a schematic diagram of the right side structure of the device for detecting the life of an additive manufacturing scraper provided by an embodiment of the present invention;

[0038] Figure 3 is a schematic diagram of a top view of the structure of a device for detecting the life of an additive manufacturing scraper provided by an embodiment of the present invention;

[0039] Figure 4 is a structural diagram of a clamping mechanism provided by an embodiment of the present invention;

[0040] Figure 5 is a structural diagram of a lifting structure provided by an embodiment of the present invention;

[0041] Figure 6 is a structural diagram of a laying substrate provided by an embodiment of the present invention;

[0042] Figure 7 It is a connection schematic diagram of a method for detecting the life of an additive manufacturing scraper provided by an embodiment of the present invention;

[0043] Figure 8 Schematic diagram of the nozzle usage state in the embodiment of the present invention. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0045] The embodiment of the present invention provides a device for detecting the life of an additive manufacturing scraper. Figure 1 , 2 As shown in FIG. 3 , it includes a base plate 1, a first lifting track structure 2, a second lifting track structure 3, a driving system 4, a connecting plate 5, a clamping mechanism 6, a nozzle 7, a laying substrate 8, a pressure sensor 9, a lifting structure 10, a camera bracket 11, a camera 12, a first partition plate 14 and a second partition plate 15.

[0046] like Figure 1As shown, the first lifting track structure 2 and the second lifting track structure 3 are installed on both sides of the base plate 1, and the first lifting track structure 2 and the second lifting track structure 3 can be lifted in the vertical direction and are provided with a movable part that can move in the horizontal direction. Specifically, the first lifting track structure includes a lifting platform 201, a connecting member 202, a track angle 203, a track 204, and a slider 205, wherein the lifting platform 201 is placed on one side of the base plate 1, the connecting member 202 can be specifically an I-shaped connecting member, which is placed on the lifting platform 201, the track angle 203 is fixed on the connecting member 202, the track 204 is located in the track angle 203, and the slider 205 as a movable part can move in the horizontal direction along the track 204. The second lifting track structure 3 has the same structure as the first lifting track structure 2. One end of the connecting plate 5 is connected to the slider of the first lifting track structure 2, and the other end is connected to the slider of the second lifting track structure 3. The driving system 4 is respectively connected to the sliders of the first lifting track structure 2 and the second lifting track structure 3, and is used for the sliders to move. The top of the clamping mechanism 6 is fixed to the lower surface of the connecting plate 5, and the scraper 13 to be tested is fixed below the clamping mechanism 6. The nozzle 7 is connected to the lower surface of the connecting plate 5 and faces the scraper 13 to be tested. The nozzle 7 is connected to the jet device to achieve jetting and clean the powder. The lifting structure 10 is arranged on one side of the bottom plate 1, the laying substrate 8 is arranged on the lifting structure 10, the pressure sensor 9 is arranged between the laying substrate 8 and the lifting structure 10, the camera bracket 11 is placed on the other side of the bottom plate 1, and the camera 12 is placed on the camera bracket 11. The camera 12 is specifically a CCD camera.

[0047] like Figure 2 and Figure 3 As shown, a first partition 14 and a second partition 15 are arranged vertically side by side and spaced apart from each other on the bottom plate. The first partition 14 and the second partition 15 divide the bottom plate into an experimental area, a cleaning area and a photographing area. The lifting structure 10 is arranged in the experimental area, and the camera bracket 11 is arranged in the photographing area.

[0048] The driving system 4 includes a motor 401, a coupling 402, and a rotating shaft 403, wherein the motor 401 is connected to the rotating shaft 403 through the coupling 402, and the rotating shaft 403 is connected to the couplings built into the rails 204 on both sides, and the torque is transmitted to the slider 205 through the internal coupling to drive the slider 205 to move on the rail 204.

[0049] like Figure 4 As shown, the clamping mechanism 6 includes an upper plate 601, a first clamping plate 602 and a second clamping plate 603, the first clamping plate 602 and the second clamping plate 603 are vertically connected to the upper plate 601, and the scraper 13 to be tested is fixed between the first clamping plate 602 and the second clamping plate 603 by a fixing mechanism.

[0050] like Figure 5As shown, the lifting structure 10 includes an electric cylinder 101, a motor 102, and a support plate 103. The electric cylinder 101 is installed on the base plate 1, the support plate 103 is arranged on the top of the electric cylinder 101, and the motor 102 is electrically connected to the electric cylinder 101 for driving the electric cylinder 101 to move up and down.

[0051] like Figure 6 As shown, a protrusion is provided on the top of the laying substrate 8, which can better simulate the pressure in the actual application process. Because the wear of the scraper is mainly caused by the jamming process between the particles and the scraper, when the jamming process occurs, the force acting on the laying substrate 8 will have an instantaneous increase process. When the width of the protruding part is narrower, the jamming acting on its part will be less, and the stress curve received by the sensor will increase and decrease (peaks and troughs) more obviously. If the protrusion is not set, the number of places where jamming occurs on the entire plane will increase, and the trend of the pressure received by the pressure sensor will not be as obvious as the previous method. In addition, in the actual 3D printing process, the powder layer is not completely flat, and there may be uneven accumulation or local protrusions. By setting protrusions on the experimental substrate, this working condition can be simulated to test the performance and wear rate of the scraper in the face of these unevenness.

[0052] The embodiment of the present invention further provides a system for detecting the life of an additive manufacturing scraper, comprising:

[0053] The above-mentioned device for detecting the life of the scraper for additive manufacturing;

[0054] A first lifting control device is used to control the lifting of the first lifting track structure and the second lifting track structure so that the scraper 13 to be tested rises to a preset height;

[0055] The second lifting control device is used to control the lifting of the lifting structure 10, so that the scraper 13 to be tested presses the protrusion on the laying substrate 8 during the experiment;

[0056] A drive control device, used to control the drive system 4, so that the scraper 13 to be tested moves to the top of the laying substrate 8 during the experiment, and reciprocates on the laying substrate 8 to complete the powder spreading experiment on the laying substrate 8, and moves to the cleaning area when cleaning is required, and moves to the front of the camera 12 when shooting is required;

[0057] The jet control device is used to control the switch of the nozzle 7 so as to clean the powder on the scraper 13 to be tested when necessary;

[0058] The life detection device is used to predict the life of the scraper 13 to be tested by using a life prediction model based on the image of the scraper 13 to be tested taken by the camera 12 after a period of experiment and the pressure data collected by the pressure sensor 9, wherein the life prediction model is a machine learning model trained using several scraper images, pressure data and corresponding life as samples.

[0059] The embodiment of the present invention further provides a method for detecting the life of an additive manufacturing scraper. The method is based on the above-mentioned device for detecting the life of an additive manufacturing scraper. Figure 7 As shown, the method includes:

[0060] S1, placing the powder to be laid on the laying substrate 8;

[0061] S2, controlling the lifting of the first lifting track structure and the second lifting track structure so that the scraper 13 to be tested rises to a preset height;

[0062] S3, controlling the driving system 4 so that the scraper 13 to be tested moves to just above the laying substrate 8;

[0063] S4, controlling the lifting and lowering of the lifting structure 10 so that the scraper 13 to be tested is pressed onto the laying substrate 8;

[0064] S5, controlling the driving system 4 so that the scraper 13 to be tested moves back and forth on the laying substrate 8 to complete the powder spreading experiment on the laying substrate 8;

[0065] S6, control the drive system 4 to move the scraper 13 to be tested to the cleaning area, and turn on the nozzle 7 switch to clean the powder on the scraper 13 to be tested, such as Figure 8 As shown;

[0066] S7, controlling the driving system 4 so that the scraper 13 to be tested moves in front of the camera 12, and using the camera 12 to capture an image of the scraper 13 to be tested;

[0067] S8. Based on the images of the scraper 13 to be tested taken by the camera 12 after a period of experiment and the pressure data collected by the pressure sensor 9, a life prediction model is used to predict the life of the scraper 13 to be tested, wherein the life prediction model is a machine learning model trained using several scraper images, pressure data and corresponding lifespans as samples.

[0068] Through the above-mentioned operation steps, the 3D printing scraper life rapid detection device of the present invention has demonstrated several significant technical advantages. First, the device uses a pressure sensor and a camera system to achieve high-precision monitoring of the scraper wear state. The pressure sensor captures the changes in the force of the scraper during work in real time, and the camera provides high-resolution image recording, so that every detail of the wear process is accurately recorded. Secondly, the device is highly automated. The slide rail system enables the scraper to move automatically between the experimental area, the cleaning area and the camera area, reducing manual intervention and improving experimental efficiency. After each experiment, the nozzle automatically cleans the residual powder on the scraper surface through the airflow to ensure the consistency of the experimental conditions. In addition, the present invention combines a machine learning algorithm, which can accurately predict the remaining life of the scraper by analyzing the sensor data and the wear image. When the degree of scraper wear exceeds the set particle diameter, the system issues an alarm to avoid production problems caused by excessive use of the scraper. The precise control of the electric cylinder ensures that the gap between the scraper and the substrate remains constant in each experiment, greatly improving the repeatability of the experimental data. At the same time, the device is highly adaptable and is not only suitable for different types of 3D printing equipment, but can also be adjusted for various materials and process conditions to provide stable wear monitoring and life prediction functions. This design greatly improves the utilization rate of the equipment, avoids downtime losses caused by sudden scraper failure, and helps operators better arrange maintenance plans and reduce maintenance costs. In short, the device of the present invention improves production efficiency and extends the service life of the equipment through precise detection and intelligent operation. It has broad application prospects and is particularly suitable for manufacturing environments that require efficient life monitoring.

Claims

1. A device for detecting the life of an additive manufacturing scraper, characterized in that: The invention comprises a base plate (1), a first lifting track structure (2), a second lifting track structure (3), a driving system (4), a connecting plate (5), a clamping mechanism (6), a nozzle (7), a laying base plate (8), a pressure sensor (9), a lifting structure (10), a camera bracket (11), and a camera (12), wherein the first lifting track structure (2) and the second lifting track structure (3) are installed on both sides of the base plate (1), the first lifting track structure (2) and the second lifting track structure (3) can be lifted in a vertical direction and are provided with a moving part that can be moved in a horizontal direction, one end of the connecting plate (5) is connected to the moving part of the first lifting track structure (2), and the other end is connected to the moving part of the second lifting track structure (3), and the driving system (4) is respectively connected to the first lifting track structure (2) and the second lifting track structure (3). The movable parts of the descending track structure (2) and the second lifting track structure (3) are used to drive the movable parts to move, the top of the clamping mechanism (6) is fixed to the lower surface of the connecting plate (5), the scraper (13) to be tested is fixed below the clamping mechanism (6), the nozzle (7) is connected to the lower surface of the connecting plate (5) and is directly opposite to the scraper (13) to be tested, the lifting structure (10) is arranged on one side of the bottom plate (1), the top of the laying substrate (8) is provided with a protrusion and is arranged on the lifting structure (10), the pressure sensor (9) is arranged between the laying substrate (8) and the lifting structure (10), the camera bracket (11) is placed on the other side of the bottom plate (1), and the camera (12) is placed on the camera bracket (11).

2. The device for detecting the life of an additive manufacturing scraper according to claim 1, characterized in that: The first lifting track structure comprises a lifting platform (201), a connecting member (202), a track angle (203), a track (204), and a slider (205), wherein the lifting platform (201) is placed on one side of the base plate (1), the connecting member (202) is placed on the lifting platform (201), the track angle (203) is fixed on the connecting member (202), the track (204) is located in the track angle (203), and the slider (205) as a moving component can move along the track (204) in a horizontal direction.

3. The device for detecting the life of an additive manufacturing scraper according to claim 1, characterized in that: The second lifting track structure (3) has the same structure as the first lifting track structure (3).

4. The device for detecting the life of an additive manufacturing scraper according to claim 3, characterized in that: The driving system (4) comprises a motor (401), a coupling (402), and a rotating shaft (403), wherein the motor (401) is connected to the rotating shaft (403) via the coupling (402), and the rotating shaft (403) is connected to a coupling built into the track (204), and the torque is transmitted to the slider (205) via the built-in coupling to drive the slider (205) to move on the track (204).

5. The device for detecting the life of an additive manufacturing scraper according to claim 1, characterized in that: The clamping mechanism (6) comprises an upper top plate (601), a first clamping plate (602) and a second clamping plate (603); the first clamping plate (602) and the second clamping plate (603) are vertically connected to the upper top plate (601); and the scraper (13) to be tested is fixed between the first clamping plate (602) and the second clamping plate (603) by a fixing mechanism.

6. The device for detecting the life of an additive manufacturing scraper according to claim 1, characterized in that: The nozzle (7) is connected to an air injection device.

7. The device for detecting the life of an additive manufacturing scraper according to claim 1, characterized in that: The lifting structure (10) comprises an electric cylinder (101), a motor (102), and a support plate (103); the electric cylinder (101) is mounted on the base plate (1); the support plate (103) is arranged on the top of the electric cylinder (101); and the motor (102) is electrically connected to the electric cylinder (101) and is used to drive the electric cylinder (101) to move up and down.

8. The device for detecting the life of an additive manufacturing scraper according to claim 1, characterized in that: The bottom plate is also provided with a first partition (14) and a second partition (15) which are arranged vertically side by side and spaced apart from each other. The first partition (14) and the second partition (15) divide the bottom plate into an experimental area, a cleaning area and a photographing area. The lifting structure (10) is arranged in the experimental area, and the camera bracket (11) is arranged in the photographing area.

9. A system for detecting the life of an additive manufacturing scraper, characterized in that: include: The device for detecting the life of an additive manufacturing scraper according to any one of claims 1 to 8; A first lifting control device, used for controlling the lifting of the first lifting track structure and the second lifting track structure, so that the scraper (13) to be tested rises to a preset height; A second lifting control device, used for controlling the lifting and lowering of the lifting structure (10), so that the scraper (13) to be tested is pressed onto the laying substrate (8) during the experiment; A drive control device, used to control the drive system (4), so that the scraper (13) to be tested moves to the position directly above the laying substrate (8) during the experiment, and reciprocates on the laying substrate (8) to complete the powder spreading experiment on the laying substrate (8), and moves to a cleaning area when cleaning is required, and moves to the front of the camera (12) when shooting is required; An air jet control device, used to control the opening and closing of the nozzle (7), so as to clean the powder on the scraper (13) to be tested when necessary; A life detection device is used to predict the life of a scraper (13) to be tested using a life prediction model based on images of the scraper (13) to be tested taken by a camera (12) after a period of experiment and pressure data collected by a pressure sensor (9), wherein the life prediction model is a machine learning model trained using a number of scraper images, pressure data and corresponding lifespans as samples.

10. A method for detecting the life of an additive manufacturing scraper, characterized in that: The method is based on the device for detecting the life of an additive manufacturing scraper according to any one of claims 1 to 8, and the method comprises: S1, placing the powder to be laid on a laying substrate (8); S2, controlling the lifting and lowering of the first lifting track structure and the second lifting track structure so that the scraper (13) to be tested rises to a preset height; S3, controlling the driving system (4) so ​​that the scraper (13) to be tested moves to a position directly above the laying substrate (8); S4, controlling the lifting and lowering of the lifting structure (10) so that the scraper (13) to be tested is pressed onto the laying substrate (8); S5, controlling the driving system (4) so ​​that the scraper (13) to be tested moves back and forth on the laying substrate (8) to complete the powder spreading experiment on the laying substrate (8); S6, controlling the driving system (4) so ​​that the scraper (13) to be tested moves to the cleaning area, and turning on the nozzle (7) switch to clean the powder on the scraper (13) to be tested; S7, controlling the driving system (4) so ​​that the scraper (13) to be tested moves in front of the camera (12), and using the camera (12) to capture an image of the scraper (13) to be tested; S8. Based on the images of the scraper (13) to be tested taken by the camera (12) after a period of experiment and the pressure data collected by the pressure sensor (9), a life prediction model is used to predict the life of the scraper (13) to be tested, wherein the life prediction model is a machine learning model trained using a number of scraper images, pressure data and corresponding lifespans as samples.

Images