Interlayer monitoring device and monitoring method

Abstract

The invention belongs to the field of additive manufacturing, and relates to an interlayer monitoring device and method, and the interlayer monitoring device comprises monitoring equipment, a protection device and a movement assembly; the protection device is of a hollow closed structure; the monitoring equipment is arranged in the protection device; the protection device is arranged on the movement assembly; the movement assembly drives the monitoring equipment to move freely through the protection device. According to the interlayer monitoring device and the monitoring method, the monitoring precision can be ensured, the loss rate is reduced, and the service life is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of additive manufacturing and relates to an interlayer monitoring device and method, particularly to an interlayer monitoring device and method for large-format triaxial laser-directed energy deposition additive manufacturing equipment. Background Technology

[0002] In the process of manufacturing large, high-value workpieces with long manufacturing cycles, the monitoring module of the large-format triaxial laser-directed energy deposition additive manufacturing equipment is exposed to a high-temperature, high-metal-dust, and high-diffuse-reflection laser energy working environment for extended periods, which presents the following problems:

[0003] 1) The additive manufacturing process takes place in an inert atmosphere, where argon has poor thermal conductivity. Therefore, the heat from laser radiation accumulates inside the equipment and cannot be effectively dissipated, creating a high-temperature operating environment (not lower than 50°C) for the internal electrical components. This temperature range reduces the monitoring accuracy of sensor measuring elements (e.g., increased temperature drift), leading to increased instability in process monitoring data.

[0004] 2) When high-power lasers melt metal powder, metal powder and fumes easily adhere to the surface of the equipment's monitoring module. Simultaneously, uncontrollable diffuse reflection energy exists inside the equipment. These working conditions are the main reasons for the short lifespan and high failure rate of the equipment monitoring device. For example, dust contamination of the viewing window of optical electronic instruments can easily lead to data distortion; localized heat deformation of the electronic instrument casing can cause instrument damage and failure. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems in the background art, the present invention provides an interlayer monitoring device and monitoring method that can ensure monitoring accuracy, reduce loss rate and increase service life.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An inter-layer monitoring device is characterized in that: the inter-layer monitoring device includes a monitoring device, a protective device, and a moving component; the protective device is a hollow, enclosed structure; the monitoring device is placed inside the protective device; the protective device is mounted on the moving component; and the moving component drives the monitoring device to move freely through the protective device.

[0008] The aforementioned protective device includes a housing, an openable window, and a window opening and closing mechanism; the monitoring device is fixedly installed inside the housing; the openable window is located at the bottom of the housing and positioned at the projection of the monitoring device at the bottom of the housing; the area of ​​the openable window is larger than the projection area of ​​the monitoring device at the bottom of the housing; the window opening and closing mechanism is connected to the openable window and drives the openable window to open and close within the housing.

[0009] The aforementioned openable window is a folding window or a panel window; when the openable window is a folding window, the window opening and closing mechanism is a folding opening and closing mechanism; when the openable window is a panel window, the window opening and closing mechanism is a rotating or flipping opening and closing mechanism.

[0010] The aforementioned protective device also includes a cooling module located inside the housing.

[0011] The aforementioned motion assembly includes a first motion mechanism that moves synchronously with the cladding head. The first motion mechanism includes a motion shaft and a mounting base on which the cladding head is mounted. The protective device is mounted on the mounting base and moves axially along the motion shaft with the mounting base.

[0012] The aforementioned motion assembly also includes a protective device motion mechanism mounted on the mounting base; the protective device is mounted on the mounting base via the protective device motion mechanism; the protective device motion mechanism drives the protective device to move along the axial direction of the protective device motion mechanism.

[0013] The aforementioned protective device's moving mechanism includes a slider and a slide groove or slide rail; the slider is placed on the slide groove or slide rail and moves along the axial direction of the slide groove or slide rail; the slide groove or slide rail is mounted on a mounting base, and the axial direction of the slide groove or slide rail is perpendicular to the axial direction of the moving shaft; the protective device is mounted on the slide groove or slide rail via the slider.

[0014] The mounting base is either in the shape of a straight line or a mirror image of the letter L. When the mounting base is a mirror image of the letter L, the mirror image of the letter L includes a horizontal arm and a vertical arm. The slide groove or slide rail is arranged along the axial direction of the vertical arm. The slider drives the protective device to move freely on the vertical arm.

[0015] The aforementioned monitoring equipment includes one or more sets of sensors; the sensors are visual monitoring modules, displacement monitoring modules, or temperature monitoring modules.

[0016] An inter-layer monitoring method based on the inter-layer monitoring device described above, characterized in that: the inter-layer monitoring method includes the following steps:

[0017] 1) Determine the monitoring mode of the inter-floor monitoring device;

[0018] 2) After the additive manufacturing equipment has finished printing the target layer forming plane, the interlayer monitoring state is activated; in the interlayer monitoring state, the cladding head is in standby mode and the cladding head outputs an indicator red light;

[0019] 3) Use the monitoring mode determined in step 1) to perform interlayer monitoring on the target layer forming plane obtained in step 2) and obtain the monitoring data of the target layer forming plane;

[0020] Preferably, the monitoring mode in step 1) is layer-by-layer monitoring, inter-layer monitoring, or intelligent monitoring;

[0021] Preferably, the layer-by-layer monitoring is a process of performing inter-layer monitoring on each forming plane through an inter-layer monitoring device and acquiring monitoring data of the monitoring layer;

[0022] The interlayer monitoring is a process of monitoring each A-layer forming plane with an interlayer monitoring device and obtaining monitoring data of the monitoring layer, where A is a natural number greater than 1;

[0023] The intelligent monitoring is a process in which, when the additive manufacturing process is abnormal, the interlayer monitoring device monitors the formed plane obtained by the abnormal forming and obtains the monitoring data of the monitoring layer. Preferably, the abnormality of the additive manufacturing process includes, but is not limited to, abnormal forming thickness and / or abnormal forming path.

[0024] Preferably, step 3) specifically involves:

[0025] 3.1) The host computer sends monitoring and scanning path instructions to the motion components and each motion axis; preferably, the monitoring and scanning path is the path of the target layer additive manufacturing process or an optimized path based on the single-layer cross-section of the target layer additive manufacturing process;

[0026] 3.2) The protective device carrying the monitoring equipment is moved to an effective monitoring position using a motion assembly;

[0027] 3.2) The operable window of the protective device is opened via a window opening and closing mechanism;

[0028] 3.3) Turn on the monitoring equipment;

[0029] 3.4) The motion component drives the protective device equipped with the monitoring equipment to move, and each motion axis executes the monitoring scanning path command. During the movement, the monitoring equipment collects data on the target layer forming plane obtained in step 2), and obtains the monitoring data of the target layer forming plane; preferably, the monitoring data of the target layer forming plane is the surface morphology imaging of the target layer forming plane and / or the working height data of the cladding head; preferably, the pixels of the surface morphology imaging of the target layer forming plane are pixels with a resolution of no more than millimeters.

[0030] Preferably, the interlayer monitoring method further includes the following after step 3):

[0031] 4) Upload the monitoring data of the target layer forming plane obtained in step 3) to the host computer.

[0032] An additive manufacturing method based on interlayer monitoring, characterized in that the additive manufacturing method includes the following steps:

[0033] 1) Obtain additive manufacturing process parameters and monitoring modes for each layer;

[0034] 2) Based on the additive manufacturing process parameters of each layer obtained in step 1), perform additive manufacturing until the target layer forming plane is obtained. Then, turn on the interlayer monitoring state. Under the interlayer monitoring state, the cladding head is in the standby state and the cladding head outputs an indicator red light.

[0035] 3) Based on the aforementioned method, interlayer monitoring is performed on the target layer forming plane to obtain monitoring data of the target layer forming plane;

[0036] 4) Based on the monitoring data of the target layer forming plane, determine whether to adjust the additive manufacturing process parameters of the next layer. If yes, use the adjusted additive manufacturing process parameters of the next layer to perform additive manufacturing and obtain the next layer forming plane; if no, continue to use the original additive manufacturing process parameters of the next layer to perform additive manufacturing and obtain the next layer forming plane.

[0037] 5) Repeat steps 1) through 4) until additive manufacturing of all layers is completed.

[0038] The advantages of this invention are:

[0039] This invention provides an interlayer monitoring device comprising a monitoring device, a protective device, and a moving component. The protective device is a hollow, enclosed structure. The monitoring device is housed within the protective device. The protective device is mounted on the moving component. The moving component drives the monitoring device to move freely via the protective device. The interlayer monitoring data obtained from this invention can be used to provide feedback on the working height of the cladding head and surface defects, improving the monitoring capability of additive manufacturing processes and allowing for layer-by-layer correction of additive manufacturing process parameters. Simultaneously, by placing the monitoring device within the protective device, this invention improves the operating environment of high-value optical and visual monitoring modules, reducing wear and tear, significantly increasing lifespan, and enhancing the stability and reliability of process monitoring. The interlayer monitoring device and method provided by this invention fill the technological gap in interlayer monitoring functionality for industrial-grade triaxial laser-directed energy deposition additive manufacturing equipment. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of the interlayer monitoring device provided by the present invention;

[0041] Figure 2 This is a flowchart illustrating the interlayer monitoring method provided by the present invention;

[0042] in:

[0043] 1-Motion axis; 2-Clad head mounting base; 3-Clad head; 301-Indicator red light; 4-Protective device movement mechanism; 401-Slider; 5-Protective device; 501-Openable window; 6-Sensor; 601-Monitoring area; 7-Forming plane; 8-Process substrate. Detailed Implementation

[0044] See Figure 1 This invention provides an interlayer monitoring device, including a monitoring device, a protective device 5, and a moving component. The protective device 5 is a hollow, enclosed structure. The monitoring device is placed inside the protective device 5. The protective device 5 is mounted on the moving component. The moving component drives the monitoring device to move freely through the protective device 5. By placing the monitoring device inside the protective device 5, this invention ensures that the monitoring device is minimized from the effects of high temperatures and dust within the forming chamber, thus ensuring monitoring accuracy. Simultaneously, this invention uses a moving component to drive the protective device 5 containing the monitoring device, for example, along the path of the additive manufacturing process or an optimized path based on the single-layer cross-section of the additive manufacturing process. This allows for timely and comprehensive tracking and feedback of the working height of the cladding head and surface defects of the forming plane, further improving the monitoring capabilities of the additive manufacturing process.

[0045] The protective device 5 includes a housing, an openable window 501, and a window opening and closing mechanism. The monitoring equipment is fixedly installed inside the housing. The openable window 501 is located at the bottom of the housing and positioned at the projection of the monitoring equipment onto the bottom of the housing. The area of ​​the openable window 501 is larger than the projected area of ​​the monitoring equipment onto the bottom of the housing. The window opening and closing mechanism is connected to the openable window 501 and drives the openable window 501 to open and close within the housing. Specifically, the window opening and closing mechanism is connected to the openable window 501 and drives the openable window 501 to complete opening and closing actions on the surface and outside of the housing. For example, the openable window 501 can be a folding window or a panel window. When the openable window 501 is a folding window, the window opening and closing mechanism is a folding opening and closing mechanism; when the openable window 501 is a panel window, the window opening and closing mechanism is a rotating or flipping opening and closing mechanism. For example, the window opening and closing mechanism can be a cylinder-driven hinge, a motor-driven linkage mechanism, or a motor-gear transmission. These methods are all existing technologies, and their structures, installation methods, and usage methods are well-known to those skilled in the art. In specific applications, the appropriate method can be selected based on the type of the openable window 501, and will not be elaborated further here. The outer shell of the protective device 5 is made of metal, and the interior of the shell is used to fix the monitoring equipment. Its wall thickness is not less than 2mm. The shell has pre-drilled mounting holes for fixing the monitoring equipment and pre-drilled cable outlet holes for installing the monitoring equipment cable tray. For example, to further reduce the temperature of the environment where the monitoring equipment is located, the protective device 5 used in this invention also includes a cooling module placed inside the shell.

[0046] See Figure 1 The motion components used in this invention include a first motion mechanism that moves synchronously with the cladding head. The first motion mechanism includes a motion shaft 1 and a mounting base 2 on which the cladding head 3 is mounted. A protective device 5 is mounted on the mounting base 2 and moves axially along the motion shaft 1 with the mounting base 2. It should be noted that the first motion mechanism can be any existing motion control mechanism, and its function is to drive the cladding head 3 to move. The protective device 5, which includes a monitoring device, used in this invention can be directly mounted on the first motion mechanism, particularly on the mounting base 2. Since both the cladding head 3 and the protective device 5 (including the monitoring device) are mounted on the mounting base 2, synchronous movement of the cladding head 3 and the protective device 5 (including the monitoring device) can be ensured while the mounting base 2 moves along the motion shaft 1.

[0047] To enhance the multi-directional movement of the protective device 5 (including monitoring equipment), the motion component used in this invention further includes a protective device motion mechanism 4 mounted on the mounting base 2. This protective device motion mechanism 4 can be considered a second motion mechanism. The protective device 5 is mounted on the mounting base 2 via the protective device motion mechanism 4; the protective device motion mechanism 4 drives the protective device 5 to move along its axial direction. The protective device motion mechanism 4 includes a slider 401 and a groove or rail; the slider 401 is placed on the groove or rail and moves along its axial direction; the groove or rail is mounted on the mounting base 2, and its axial direction is perpendicular to the axial direction of the motion shaft 1; the protective device 5 is mounted on the groove or rail via the slider 401. The protective device 5 is fixed to the surface of the slider 401, enabling spatial movement of the protective device towards / away from the working plane. It should be noted that the cladding head mounting base 2 can move left and right on the motion shaft 1, generally through the slider movement; the cladding head 3 and the protective device motion mechanism 4 are both mounted on the cladding head mounting base 2; and the monitoring and protection module 5 can move up and down via the slider 401.

[0048] The mounting base 2 can be a straight line or a mirror image of the letter L, or other irregular shapes. When the mounting base 2 is a mirror image of the letter L, the mirror image structure includes a horizontal arm and a vertical arm. A slide groove or slide rail is set along the axial direction of the vertical arm. The slider 401 drives the protective device 5 to move freely on the vertical arm. The straight line structure is a very common structural form and will not be described in detail here. For example, when the mounting base 2 adopts a mirror image of the letter L, that is, when the mounting base 2 adopts an irregular shape, the protective device movement mechanism 4 is set on the vertical arm (of course, it can also be set directly on the horizontal arm; when set on the horizontal arm, the setting and working method are the same as the straight line structure mounting base). In this way, the origin or initial position of the protective device 5 can be higher, resulting in a lower temperature at the monitoring equipment and stronger protection. In other words, the measures of this invention to ensure that the monitoring equipment is not affected by the high temperature during the printing process are as follows: Firstly, during the printing process, the temperature is relatively high at the printing position and decreases as it moves further away from the printing position, thus ensuring that the monitoring equipment is not affected by the printing temperature. At the same time, the irregularly shaped mounting base 2 used in this invention can ensure that the origin or initial position is higher, further ensuring that it is not affected by the high temperature. Secondly, a cooling device can be set on or inside the protective device 5 to further reduce the temperature of the environment in which the monitoring equipment is located.

[0049] For example, the monitoring device includes one or more sets of sensors to monitor one or more process information. When the monitoring device includes multiple sets of sensors, and each set of sensors is of the same type, the monitoring areas of adjacent sets of sensors are at least tangent. For example, see... Figure 1 The protective device 5 is equipped with two sets of identical sensors arranged in parallel, namely two sets of identical sensors 6. The monitoring area 601 of the left sensor 6 is tangent to the monitoring area of ​​the adjacent sensor (i.e., the monitoring area 601 of the right sensor 6). The sensors are visual monitoring modules, displacement monitoring modules, or temperature monitoring modules.

[0050] See Figure 2 In addition to providing the inter-layer monitoring device as described above, the present invention also provides an inter-layer monitoring method based on the inter-layer monitoring device, the inter-layer monitoring method comprising the following steps:

[0051] 1) Determine the monitoring mode of the interlayer monitoring device; wherein, the monitoring mode is layer-by-layer monitoring, inter-layer monitoring, or intelligent monitoring; it should be noted that: layer-by-layer monitoring is the process of monitoring each forming plane of each layer and obtaining the monitoring data of the monitoring layer through the interlayer monitoring device; inter-layer monitoring is the process of monitoring each A-layer forming plane of each layer and obtaining the monitoring data of the monitoring layer through the interlayer monitoring device, where A is a natural number greater than 1, for example, A is 2, that is, monitoring is performed every 2 layers; intelligent monitoring is the process of monitoring the forming plane obtained by abnormal forming through the interlayer monitoring device and obtaining the monitoring data of the monitoring layer when the additive manufacturing process is abnormal; preferably, the abnormality of the additive manufacturing process includes but is not limited to abnormal forming thickness and / or abnormal forming path; for example, if the monitoring device detects that the height of the target layer forming plane is 5mm lower than the original height, then the 5mm error will be made up in the forming process of the next layer, and finally the next layer forming plane will be formed.

[0052] 2) After the additive manufacturing equipment has finished printing the target layer forming plane, the interlayer monitoring state is activated; under the interlayer monitoring state, the cladding head is in standby mode and the cladding head outputs an indicator red light;

[0053] 3) Use the monitoring mode selected in step 1) to perform interlayer monitoring on the target layer forming plane obtained in step 2), and obtain the monitoring data of the target layer forming plane. Specifically:

[0054] 3.1) The host computer sends monitoring and scanning path instructions to the motion components and each motion axis; for example, the monitoring and scanning path is the path of the target layer additive process or an optimized path based on the single-layer cross-section of the target layer additive process;

[0055] 3.2) The protective device carrying the monitoring equipment is moved to an effective monitoring position by means of a motion component, wherein the effective monitoring position refers to the position where the monitoring equipment can actually effectively collect monitoring data;

[0056] 3.2) The operable window of the protective device is opened via a window opening and closing mechanism;

[0057] 3.3) Turn on the monitoring equipment;

[0058] 3.4) The motion component drives the protective device equipped with the monitoring equipment to move, and each motion axis executes the monitoring scanning path command. During the movement, the monitoring equipment collects data on the target layer forming plane obtained in step 2), and obtains the monitoring data of the target layer forming plane; preferably, the monitoring data of the target layer forming plane is the surface morphology imaging of the target layer forming plane and / or the working height data of the cladding head; preferably, the pixels of the surface morphology imaging of the target layer forming plane are pixels with a resolution of no more than millimeters.

[0059] Preferably, the interlayer monitoring method provided by the present invention further includes, after step 3):

[0060] 4) Upload the monitoring data of the target layer forming plane obtained in step 3) to the host computer.

[0061] After data acquisition or data upload is completed, the openable window 501 is closed, and the protective device 5 containing the monitoring equipment is moved to the origin or initial position by the motion component to complete the forming monitoring of the current target layer.

[0062] Furthermore, the present invention also provides an additive manufacturing method based on interlayer monitoring, comprising the following steps:

[0063] 1) Obtain additive manufacturing process parameters and monitoring modes for each layer;

[0064] 2) Based on the additive manufacturing process parameters of each layer obtained in step 1), additive manufacturing is carried out on the process substrate 8 until the target layer forming plane 7 is obtained. Then, the interlayer monitoring state is turned on. Under the interlayer monitoring state, the cladding head is in the standby state and the cladding head outputs an indicator red light.

[0065] 3) Based on the aforementioned method, interlayer monitoring is performed on the target layer forming plane to obtain monitoring data of the target layer forming plane;

[0066] 4) Based on the monitoring data of the target layer forming plane, determine whether to adjust the additive manufacturing process parameters of the next layer. If yes, use the adjusted additive manufacturing process parameters of the next layer to perform additive manufacturing and obtain the next layer forming plane; if no, continue to use the original additive manufacturing process parameters of the next layer to perform additive manufacturing and obtain the next layer forming plane.

[0067] 5) Repeat steps 1) through 4) until additive manufacturing of all layers is completed.

Claims

1. An inter-floor monitoring device, characterized in that: The interlayer monitoring device includes monitoring equipment, a protective device (5), and a moving component; the protective device (5) is a hollow, enclosed structure; the monitoring equipment is placed inside the protective device (5); the protective device (5) is mounted on the moving component; the moving component drives the monitoring equipment to move freely through the protective device (5).

2. The inter-layer monitoring device according to claim 1, characterized in that: The protective device (5) includes a housing, an openable window (501), and a window opening and closing mechanism; the monitoring device is fixedly installed inside the housing; the openable window (501) is opened at the bottom of the housing and placed at the projection of the monitoring device at the bottom of the housing; the area of ​​the openable window (501) is larger than the projection area of ​​the monitoring device at the bottom of the housing; the window opening and closing mechanism is connected to the openable window (501) and drives the openable window (501) to open and close within the housing.

3. The inter-layer monitoring device according to claim 2, characterized in that: The openable window (501) is a folding window or a panel window; when the openable window (501) is a folding window, the window opening and closing mechanism is a folding opening and closing mechanism; when the openable window (501) is a panel window, the window opening and closing mechanism is a rotating or flipping opening and closing mechanism.

4. The inter-layer monitoring device according to claim 3, characterized in that: The protective device (5) also includes a cooling module placed inside the housing.

5. The inter-layer monitoring device according to claim 4, characterized in that: The motion assembly includes a first motion mechanism that moves synchronously with the cladding head. The first motion mechanism includes a motion shaft (1) and a mounting base (2) on which the cladding head (3) is mounted. The protective device (5) is mounted on the mounting base (2) and moves axially along the motion shaft (1) with the mounting base (2).

6. The inter-layer monitoring device according to claim 5, characterized in that: The motion assembly also includes a protective device motion mechanism (4) disposed on the mounting base (2); the protective device (5) is disposed on the mounting base (2) via the protective device motion mechanism (4); the protective device motion mechanism (4) drives the protective device (5) to move along the axial direction of the protective device motion mechanism (4).

7. The inter-layer monitoring device according to claim 6, characterized in that: The protective device motion mechanism (4) includes a slider (401) and a groove or rail; the slider (401) is placed on the groove or rail and moves along the axial direction of the groove or rail; the groove or rail is set on the mounting base (2), and the axial direction of the groove or rail is perpendicular to the axial direction of the motion shaft (1); the protective device (5) is set on the groove or rail by the slider (401).

8. The inter-layer monitoring device according to claim 7, characterized in that: The mounting base (2) is in the shape of a straight line or a mirror image of the letter L. When the mounting base (2) is a mirror image of the letter L, the mirror image of the letter L includes a horizontal arm and a vertical arm. The slide groove or slide rail is arranged along the axial direction of the vertical arm. The slider (401) drives the protective device (5) to move freely on the vertical arm.

9. The inter-layer monitoring device according to any one of claims 1-8, characterized in that: The monitoring equipment includes one or more sets of sensors; the sensors are visual monitoring modules, displacement monitoring modules, or temperature monitoring modules.

10. An inter-layer monitoring method based on the inter-layer monitoring device as described in claim 9, characterized in that: The interlayer monitoring method includes the following steps: 1) Determine the monitoring mode of the inter-floor monitoring device; 2) After the additive manufacturing equipment has finished printing the target layer forming plane, the interlayer monitoring state is activated; in the interlayer monitoring state, the cladding head is in standby mode and the cladding head outputs an indicator red light; 3) Use the monitoring mode determined in step 1) to perform interlayer monitoring on the target layer forming plane obtained in step 2) and obtain the monitoring data of the target layer forming plane; Preferably, the monitoring mode in step 1) is layer-by-layer monitoring, inter-layer monitoring, or intelligent monitoring; Preferably, the layer-by-layer monitoring is a process of performing inter-layer monitoring on each forming plane through an inter-layer monitoring device and acquiring monitoring data of the monitoring layer; The interlayer monitoring is a process of monitoring each A-layer forming plane with an interlayer monitoring device and obtaining monitoring data of the monitoring layer, where A is a natural number greater than 1; The intelligent monitoring refers to the process of monitoring the formed plane obtained by abnormal forming through an interlayer monitoring device and acquiring monitoring data of the monitored layers when the additive manufacturing process is abnormal. Preferably, the abnormal additive manufacturing process includes, but is not limited to, abnormal forming thickness and / or abnormal forming path; preferably, step 3) specifically involves: 3.1) The host computer sends monitoring and scanning path instructions to the motion components and each motion axis; preferably, the monitoring and scanning path is the path of the target layer additive manufacturing process or an optimized path based on the single-layer cross-section of the target layer additive manufacturing process; 3.2) The protective device carrying the monitoring equipment is moved to an effective monitoring position using a motion assembly; 3.2) The operable window of the protective device is opened via a window opening and closing mechanism; 3.3) Turn on the monitoring equipment; 3.4) The motion component drives the protective device equipped with the monitoring equipment to move, and each motion axis executes the monitoring scanning path command; during the movement, the monitoring equipment collects data on the target layer forming plane obtained in step 2) to obtain the monitoring data of the target layer forming plane; preferably, the monitoring data of the target layer forming plane is the surface morphology imaging of the target layer forming plane and / or the working height data of the cladding head; preferably, the pixels of the surface morphology imaging of the target layer forming plane are pixels with a resolution of no more than millimeters. Preferably, the interlayer monitoring method further includes the following after step 3): 4) Upload the monitoring data of the target layer forming plane obtained in step 3) to the host computer; An additive manufacturing method based on interlayer monitoring, characterized in that: The additive manufacturing method includes the following steps: 1) Obtain additive manufacturing process parameters and monitoring modes for each layer; 2) Based on the additive manufacturing process parameters of each layer obtained in step 1), perform additive manufacturing until the target layer forming plane is obtained. Then, turn on the interlayer monitoring state. Under the interlayer monitoring state, the cladding head is in the standby state and the cladding head outputs an indicator red light. 3) Based on the aforementioned method, interlayer monitoring is performed on the target layer forming plane to obtain monitoring data of the target layer forming plane; 4) Based on the monitoring data of the target layer forming plane, determine whether to adjust the additive manufacturing process parameters of the next layer. If yes, use the adjusted additive manufacturing process parameters of the next layer to perform additive manufacturing and obtain the next layer forming plane; if no, continue to use the original additive manufacturing process parameters of the next layer to perform additive manufacturing and obtain the next layer forming plane. 5) Repeat steps 1) through 4) until additive manufacturing of all layers is completed.

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