High-precision automatic pressing device for backboard assembly and pressing method thereof

Abstract

The application discloses a high-precision automatic pressing device for a back plate assembly and a pressing method thereof, and belongs to the technical field of back plate assembly pressing devices.The device comprises a limiting groove for placing a middle frame;the limiting groove is provided with a back plate positioning device on the groove opening plane, which is used for making the bending structure correspondingly adhere to the middle frame;the pressing mechanism is arranged opposite to the position where the bending structure adheres to the middle frame;the device further comprises a full-length detection module of the assembly, a flash joint monitoring module, an assembly foot in-out turning detection module and an in-out turning adjustment module;the control signal of the full-length detection module of the assembly and the flash joint monitoring module is connected to the adjustable groove wall of the limiting groove;the adjustable groove wall moves close to or away from the fixed groove wall of the limiting groove;the control signal of the assembly foot in-out turning detection module is connected to the in-out turning adjustment module.The application can adaptively adjust the assembly by monitoring the changes of the full length, flash joint and in-out turning state during the pressing process in real time, so as to ensure the precision and quality after the final pressing.

Description

Technical Field

[0001] This invention relates to the field of automatic pressing technology, and in particular to a high-precision automatic pressing device and pressing method for a backplate assembly. Background Technology

[0002] Press-fitting is a common processing technique used in the assembly of modular products, especially in the production of backsheet modules. It typically involves pressing the mid-frame and backsheet together using a C-fold structure to achieve the connection. However, press-fitting requires high dimensional accuracy at the joint; large errors can easily affect the dimensional accuracy of the finished module or result in insecure assembly, severely impacting the yield rate of the backsheet module. Currently, most press-fitting devices only have the pressing function and require quality inspection of the finished product after pressing, lacking the ability to adjust and eliminate factors affecting quality during the pressing process. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a high-precision automatic pressing device and pressing method for back panel components. By monitoring the changes in the total length, gap, and inward and outward folding states during the pressing process in real time, the device can adaptively adjust the components to ensure the precision and quality of the final pressed components.

[0004] Technical Solution: To achieve the above objectives, the present invention provides a high-precision automatic pressing device and pressing method for a back panel assembly, comprising a limiting groove for placing a middle frame, the middle frame having a fitting groove adapted to the bending structure of the back panel edge, the middle frame being located within the limiting groove, the opening of the fitting groove being in the same direction as the opening of the limiting groove; a back panel positioning device is provided on the plane of the limiting groove opening for placing the back panel and carrying it close to the middle frame, and ensuring that the bending structure on it is correspondingly fitted to the middle frame; a pressure applying mechanism is provided directly opposite the fitting position of the bending structure and the middle frame for applying pressure to make the bending structure embed and press relative to the opening of the fitting groove;

[0005] It also includes a component full-length detection module, a gap detection module, a component foot inward / outward turning detection module, and an inward / outward turning adjustment module. The signal output terminals of the component full-length detection module and the gap detection module are electrically connected to the adjustable groove wall of the limiting groove through a control module. The adjustable groove wall moves closer to or further away from the fixed groove wall of the limiting groove. The signal output terminal of the component foot inward / outward turning detection module is electrically connected to the inward / outward turning adjustment module through a control module.

[0006] Furthermore, the back panel positioning device includes several positioning units and several supporting units. The positioning end of the positioning unit is inserted into the positioning functional hole on the back panel, and the supporting surface of the supporting unit is attached to the bottom side of the back panel. Both the positioning unit and the supporting unit are raised and lowered relative to the plane of the limiting groove.

[0007] Furthermore, the groove wall on the side of the limiting groove closest to the back plate is the fixed groove wall, and the groove wall on the side away from the back plate is the adjustable groove wall; the adjustable groove wall is provided with the flash gap monitoring module, which includes multiple ranging units arranged vertically.

[0008] Furthermore, a groove width measuring unit is provided on the adjustable groove wall, and the groove width measuring units on the two relatively parallel limiting grooves constitute the component full length detection module.

[0009] Furthermore, the component foot inward and outward turning detection module and the inward and outward turning adjustment module are respectively provided on both sides of the middle frame, and the component foot inward and outward turning detection module and the inward and outward turning adjustment module located on the same side of the groove wall are electrically connected.

[0010] Furthermore, the component foot inward and outward turning detection module is located on both sides of the limiting groove, and the component foot inward and outward turning detection module includes two ranging units arranged vertically.

[0011] Furthermore, the inward and outward turning adjustment module is provided with multiple adjustment units, including an outward turning adjustment unit located on the two side walls of the limiting groove, and an inward turning adjustment unit located on the two outer side walls of the upper pressure strip. When the upper pressure strip extends into the fitting groove, its two outer side walls are respectively parallel to the inner side wall of the fitting groove.

[0012] Furthermore, the adjustment unit includes a pressing member that contacts the corner edges on both sides of the middle frame. The pressing member is connected to the output end of the adjustment mechanism. The pressing member is vertically telescopically arranged relative to its plane. The pressing member is adjusted and moved along the depth direction of the limiting groove.

[0013] Furthermore, the two ranging units of the component foot inward and outward turning detection module are located at both ends of the top pressure member movement adjustment path.

[0014] Furthermore, it includes the following steps:

[0015] S1. Place the middle frame in the limiting groove, and use the component foot inward and outward turning detection module to detect whether the two corner edges of the middle frame are turned inward or outward. If there is inward or outward turning, trigger the adjustment unit at the corresponding position to perform top pressure adjustment until the inward and outward turning is adjusted to within the allowable error range.

[0016] S2. Raise multiple positioning units and multiple supporting units to a certain height, align and insert the back plate with the positioning units and place it on the supporting units, and simultaneously lower multiple positioning units and supporting units until the back plate and the middle frame are in corresponding contact.

[0017] S3. Pressure is applied by the pressure end of the pressure application mechanism to the edge of the back panel and the middle frame until they are pressed together and the pressure is maintained for a period of time to complete the pressing action; during the process, the changes in the entire length of the component, the gap, and the inward and outward folding state of the feet are monitored in real time.

[0018] When there is a defect along the entire length and there is an outward change, the outward change should be adjusted first. After adjusting to a state without outward change, the adjustment of the adjustable groove wall of the corresponding limit groove should be triggered according to the type of defect along the entire length.

[0019] When the entire length is reached, the adjustable groove wall in the corresponding length direction slides inward for adjustment;

[0020] When the total length is small, the adjustable groove wall in the corresponding length direction slides outward for adjustment;

[0021] When the gap is larger than the preset value range, the adjustable groove wall at the corresponding position slides inward to adjust;

[0022] When the gap is smaller than the preset value range, the adjustable groove wall at the corresponding position slides outward to adjust;

[0023] When the total length is long and the gap is at the lower limit of the pre-defined range, or the total length is short and the gap is at the upper limit of the pre-defined range, and there is no inward or outward flipping, the back panel is judged to be defective, the pressing action is terminated, and the back panel is lifted by the support unit to separate it from the middle frame.

[0024] S4. The finished component that has been pressed is lifted off the limiting groove by the supporting unit to complete the demolding and unloading action.

[0025] Beneficial effects: The high-precision automatic pressing device and pressing method for backplate assembly of the present invention have at least the following advantages:

[0026] (1) The inner and outer folding states of the middle frame were monitored and adjusted twice before and during the pressing process to ensure that the preconditions for pressing were met, so that the pressing was smooth. At the same time, the inner and outer folding was avoided from affecting the overall length of the finished component during the pressing process, thus ensuring the precision and quality of the pressing.

[0027] (2) During the pressing process, the size of the gap between the component and the splicing joint is monitored in real time, and dynamic adjustments are made accordingly to ensure that the length, gap and inward and outward flipping of the final component are within the allowable error range, thereby ensuring the pressing quality of the back panel component.

[0028] (3) Through dynamic monitoring and debugging, when an abnormal combination of conditions occurs and the corresponding debugging action cannot be triggered, the pressing is automatically terminated, the two component items are separated, and the defective back panel item is recycled to avoid material waste. Attached Figure Description

[0029] Appendix Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0030] Appendix Figure 2 This is a schematic diagram of the structure of a backplate positioning device according to an embodiment of the present invention;

[0031] Appendix Figure 3 This is a schematic diagram of the structure of a flash gap monitoring module according to an embodiment of the present invention;

[0032] Appendix Figure 4 This is a schematic diagram of the structure of a component full-length detection module according to an embodiment of the present invention;

[0033] Appendix Figure 5 This is a schematic diagram of the inverted adjustment state according to an embodiment of the present invention;

[0034] Appendix Figure 6 This is a schematic diagram of the structure of the adjustable unit on the adjustable groove wall according to an embodiment of the present invention. Detailed Implementation

[0035] The invention will now be further described with reference to the accompanying drawings.

[0036] As attached Figure 1-6 The aforementioned high-precision automatic pressing device and pressing method for a back panel assembly includes a limiting groove 1 for placing a middle frame 2. The middle frame 2 is provided with a fitting groove adapted to the bending structure 41 of the edge of the back panel 4. When the middle frame 2 is located in the limiting groove 1, the opening of its fitting groove is in the same direction as the opening of the limiting groove 1. A back panel positioning device 3 is provided on the plane of the opening of the limiting groove 1 for placing the back panel 4 and carrying it close to the middle frame 2, and making its bending structure 41 correspondingly fit with the middle frame 2. A pressure applying mechanism 5 is provided directly opposite the fitting position of the bending structure 41 and the middle frame 2 for applying pressure to make the bending structure 41 embed and press relative to the opening of the fitting groove.

[0037] This solution is applicable to the press-fit assembly of common backplate components. In common backplate components, the backplate and the middle frame are engaged and locked together via two C-shaped bending mechanisms to achieve the press-fit connection. This solution uses limiting grooves to constrain the middle frame structure and a backplate positioning device to constrain the backplate structure, thus determining their vertical relative positions. After positioning, the backplate is driven closer to the middle frame, ensuring precise alignment of their corresponding mating positions. Alignment is maintained before pressure is applied for integration, effectively guaranteeing the quality of the press-fit assembly.

[0038] The back panel positioning device 3 includes several positioning units 31 and several supporting units 32. The positioning end of the positioning unit 31 is inserted into the positioning functional hole on the back panel 4, and the supporting surface of the supporting unit 32 is attached to the bottom side of the back panel 4. Both the positioning unit 31 and the supporting unit 32 are raised and lowered relative to the groove opening plane of the limiting groove 1. Each positioning unit consists of a positioning pin and a lifting cylinder. The positioning pin is connected to the output end of the lifting cylinder via a mounting block. Each supporting unit consists of a supporting block and a lifting cylinder. The supporting block is connected to the output end of the lifting cylinder. In practical applications, the limiting groove 1 is set on a fixed reference platform, and both the lifting cylinder and the lifting cylinder are raised and lowered relative to this precise platform. During descent, multiple cylinders descend synchronously, ensuring the back panel remains parallel to the middle frame and descends smoothly until it is in contact with the middle frame, avoiding misalignment due to tilting and thus ensuring the accuracy of the pressing.

[0039] To further ensure the accuracy of the bonding process, the system also includes a component full-length detection module 6, a gap monitoring module 7, a component foot inward / outward folding detection module 8, and an inward / outward folding adjustment module. The gap monitoring module 7 monitors the allowable gap size between the middle frame and the back panel at the bonding point. A preset range for the gap size is set according to quality requirements, and the difference between the measured value and the preset value is used as data to adjust the gap size. The component full-length detection module 6 is used when the component has multiple parallel bonding points in a single direction. Since the total length of the component in that direction is affected by the gap size at multiple bonding points and other related factors, the entire length needs to be detected. Similarly, a full-length range is set according to the dimensional requirements of the finished component in that direction, and the difference between the actual measured value and the preset value is used as data to adjust the full-length size. Adjustments based on real-time monitoring data result in more precise bonding.

[0040] The signal output terminals of the component full-length detection module 6 and the flash gap monitoring module 7 are electrically connected to the adjustable groove wall 11 of the limiting groove 1 through a control module. The adjustable groove wall moves closer to or further away from the fixed groove wall of the limiting groove 1. The groove wall of the limiting groove 1 on the side closer to the back plate 4 is the fixed groove wall, and the groove wall on the side away from the back plate 4 is the adjustable groove wall 11. The flash gap monitoring module 7 is provided on the adjustable groove wall 11.

[0041] Due to the structural characteristics of the combination of the middle frame and the back panel, the connection between them is roughly an annular area. However, in actual pressing, there are various pressing situations, such as independent multi-segment pressing, continuous multi-segment pressing, or complete annular pressing. Among them, independent multi-segment pressing and continuous multi-segment pressing are also distributed on the annular area. Therefore, this solution fixes the groove wall near the inner ring side, connecting with each other to form a fixed reference surface, while the groove wall near the outer ring side has an adjustable relative distance from the corresponding fixed groove wall. If there are no dimensional defects in the two individual parts of the middle frame and the back panel, the size of the gap between them and the overall length of the component in a certain direction can be finely adjusted by adjusting the outer groove wall to ensure higher pressing accuracy between them.

[0042] Preferably, the flash gap monitoring module 7 includes multiple ranging units arranged vertically, i.e., along the groove depth direction. The height of the adjustable groove wall 11 is set higher than the outer edge height of the middle frame. When the middle frame is placed in the limiting groove, some of the ranging units correspond to the middle frame and are used to measure the distance d1 between the adjustable groove wall 11 and the outer edge of the middle frame; the remaining units are set higher than the middle frame and are used to measure the distance d2 between the adjustable groove wall 11 and the outer side of the back panel. The thickness of the frame material at the measurement position is set to d0. Then, the flash gap size D = (d2 - d1) - d0, as shown in the attached diagram. Figure 5 As shown, d1 = 0, which is not marked.

[0043] The adjustable groove wall 11 is provided with a groove width measuring unit 61. The groove width measuring units 61 on the two relatively parallel limiting grooves 1 constitute the component full length detection module 6. Since the distance y between the two fixed groove wall surfaces of the two relatively parallel limiting grooves is fixed, the full length L of the component in this direction can be calculated by measuring the groove widths x1 and x2 of the limiting grooves at both ends and ensuring that the adjustable groove wall 11 is in contact with the outer side of the corresponding position of the middle frame.

[0044] The signal output terminal of the component foot inversion / outversion detection module 8 is electrically connected to the inversion / outversion debugging module through the control module.

[0045] A common mid-frame design creates a fitting groove by flipping the two sides of the frame material by 90°. However, the folding on both sides is affected by various factors, potentially resulting in some degree of outward or inward folding. This can lead to problems such as loose bonding or difficulty in embedding the back panel, affecting the bonding accuracy of the finished component. Therefore, a component foot inward / outward folding detection module 8 and an inward / outward folding adjustment module are respectively provided on both sides of the mid-frame 2. These two modules, located on the same side of the groove wall, are electrically connected. Both sides can be independently detected and adjusted.

[0046] The component foot inward / outward turning detection module 8 is located on both sides of the limiting groove 1. The module 8 includes two vertically arranged distance measuring units. The difference between the data measured by the two units is used to determine whether inward / outward turning exists and the direction of the turning, allowing the inward / outward turning adjustment module to perform corresponding adjustments. If the upper distance measuring value is less than the lower distance measuring value, it is determined to be outward turning; if the upper distance measuring value is greater than the lower distance measuring value, it is determined to be inward turning.

[0047] The inward and outward turning adjustment module is equipped with multiple adjustment units 9, including an outward turning adjustment unit located on both sides of the groove wall of the limiting groove 1, and an inward turning adjustment unit located on both sides of the upper pressure strip 51.

[0048] The upper pressure strip is an independently movable part of the pressure-applying mechanism 5. It moves up and down independently relative to the pressing surface used for pressing. In the pressing state, it retracts and is parallel to the pressing surface. Its width is narrower than the width of the middle frame fitting groove so that it can be inserted into the fitting groove for inward adjustment. When the upper pressure strip 51 is inserted into the fitting groove, its two outer side walls are respectively parallel to the inner side wall of the fitting groove.

[0049] The adjustment unit 9 includes a pressing member 91 that contacts the two corner edges of the middle frame 2. The pressing member 91 is connected to the output end of the adjustment mechanism. The pressing member 91 is vertically telescopically arranged relative to its plane, and the pressing member 91 is adjusted by moving along the depth direction of the limiting groove 1. The pressing member is adjusted in position by lifting and sliding and laterally telescopically sliding, thereby changing its contact position with the folded edges that are turning inward or outward. In conjunction with the lateral limiting of the adjustable groove wall 11 of the limiting groove, the inward or outward turning condition is improved.

[0050] Preferably, the pressing component adopts a roller structure, with a track groove 92 on the plane of the pressing component for its extension, retraction, lifting, and sliding adjustment. An elastic foam structure layer 93 is installed at the outlet end of the track groove, and the roller shaft is positioned transversely parallel to the end face of the track groove opening. When the rollers extend relative to each other, the foam structure layer is lifted, causing it to bulge locally, thus forming a slope surface with a certain angle on the extended plane. The angle of the slope surface can be adjusted by the extension, retraction, lifting, and sliding adjustment of the pressing component to meet the adjustment requirements of different degrees of inward and outward folding. Multiple adjustment units 9 of this structure can be arranged equidistantly along the length direction on the outer side of the upper pressure strip and the inner side of the limiting groove. This provides better adjustment and improvement effects for torsional inward and outward folding that is prone to occur in non-closed-loop frame structures.

[0051] Preferably, the two ranging units of the component foot inward and outward turning detection module 8 are located at both ends of the moving adjustment path of the top pressing member 91.

[0052] Based on the above structure and control system, the pressing method of this high-precision pressing device includes the following steps:

[0053] S1. Place the middle frame in the limiting groove, and use the component foot inward and outward turning detection module 8 to detect whether the two sides of the middle frame are turned inward or outward. If there is inward or outward turning, trigger the adjustment unit 9 at the corresponding position to perform top pressure adjustment until the inward and outward turning is adjusted to within the allowable error range.

[0054] When inward or outward turning is detected, the adjustable groove wall 11 is first slidably adjusted so that both sides of the limiting groove are in contact with the middle frame. Simultaneously, the upper pressure strip is lowered and inserted into the middle frame's fitting groove, pressing the middle frame firmly within the limiting groove. Based on the inward or outward turning of the two side edges, the corresponding adjustment unit is activated. After activation, the top pressure component of the adjustment unit extends from the bottom until the foam layer contacts the inner wall or outer side of the middle frame's fitting groove. It then slowly moves upward until it reaches the uppermost end of the corresponding side fitting groove wall. This ensures that both sides of the fitting groove are in contact with the inner walls of the limiting groove and maintains pressure for a certain period, thus improving the inward or outward turning. If outward turning is present, during the upward movement of the top pressure component, the adjustable groove wall 11 is laterally compressed, and the extension length of the retractable top pressure component is reduced according to the outward turning angle until both side edges are in contact with the groove wall of the limiting groove, completing the adjustment and improvement of the outward turning.

[0055] S2. Raise multiple positioning units 31 and multiple supporting units 32 to a certain height, align and insert the back plate with the positioning units and place it on the supporting units, and lower the multiple positioning units and supporting units simultaneously until the back plate and the middle frame are in corresponding contact; after contact, the contact area can be tapped lightly with a rubber mallet to make the contact between the two more secure, which is convenient for subsequent pressing operations.

[0056] S3. Pressure is applied by the pressure end of the pressure application mechanism 5 to the edge of the back panel and the middle frame until they are pressed together and the pressure is maintained for a period of time to complete the pressing action; during the process, the changes in the entire length of the component, the gap, and the inward and outward turning state of the feet are monitored in real time.

[0057] When a defect occurs along the entire length and there is an outward bulge, the outward bulge should be adjusted first. The specific adjustment is as described in S1 above. After adjusting to a state without outward bulge, the adjustment of the corresponding adjustable groove wall 11 of the limit groove is triggered according to the type of defect along the entire length, as follows:

[0058] When the entire length is reached, the adjustable groove wall 11 in the corresponding length direction slides inward for adjustment;

[0059] When the total length is small, the adjustable groove wall 11 in the corresponding length direction slides outward for adjustment;

[0060] When the gap is larger than the preset value range, the adjustable groove wall 11 at the corresponding position slides inward to adjust;

[0061] When the gap is smaller than the preset value range, the adjustable groove wall 11 at the corresponding position slides outward to adjust;

[0062] When the overall length is too large or too small, and the gaps at both ends are one large and one small, adjust the corresponding side first according to the above gap conditions to make the gaps at one or both ends meet the standard. Then, based on the state of the overall length after adjustment, make a second adjustment to make the gaps at both ends and the overall length meet the standard.

[0063] When the total length is large and the flash gaps at both ends are large, the adjustable groove walls 11 at both ends slide inward. Among them, according to the size of the flash gaps at both ends, the adjustable groove wall 11 at the end with the larger flash gap is slid and adjusted first until the size of the flash gaps at both ends is the same. Then, both sides slide and adjust synchronously until the flash gaps and the total length are within the preset range.

[0064] When the overall length is small and the flash gaps at both ends are small, the adjustable groove walls 11 at both ends slide outward. Specifically, depending on the size of the flash gaps at both ends, the adjustable groove wall 11 at the end with the smaller flash gap is slid and adjusted first until the size of the flash gaps at both ends is the same. Then, both sides slide and adjust synchronously until the flash gaps and the overall length are within the preset range.

[0065] When the total length is short and the gap is at the lower limit of the pre-defined range, or the total length is short and the gap is at the upper limit of the pre-defined range, and there is no inward or outward flipping, the back panel is judged to be defective, the pressing action is terminated, and the back panel is lifted by the support unit to separate it from the middle frame, and the defective product is recycled and processed.

[0066] S4. The finished component that has been pressed is lifted off the limiting groove by the supporting unit to complete the demolding and unloading action.

[0067] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the above principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A high-precision automatic pressing device for backplate assemblies, characterized in that: Includes a limiting groove (1), which is used to place the middle frame (2). The middle frame (2) is provided with a fitting groove that is adapted to the bending structure (41) of the edge of the back plate (4). When the middle frame (2) is located in the limiting groove (1), the opening of its fitting groove is in the same direction as the opening of the limiting groove (1). The plane of the opening of the limiting groove (1) is provided with a back plate positioning device (3), which is used to place the back plate (4) and carry it close to the middle frame (2), and make its bending structure (41) fit with the middle frame (2). A pressure applying mechanism (5) is provided at the position where the bending structure (41) fits with the middle frame (2), which is used to apply pressure so that the bending structure (41) is embedded and pressed relative to the opening of the fitting groove. It also includes a component full length detection module (6), a gap detection module (7), a component foot inward and outward turning detection module (8), and an inward and outward turning adjustment module. The signal output terminals of the component full length detection module (6) and the gap detection module (7) are electrically connected to the adjustable groove wall (11) of the limiting groove (1) through a control module. The adjustable groove wall (11) moves closer to or away from the fixed groove wall of the limiting groove (1). The signal output terminal of the component foot inward and outward turning detection module (8) is electrically connected to the inward and outward turning adjustment module through a control module. The wall of the limiting groove (1) near the back plate (4) is the fixed groove wall, and the wall of the limiting groove (1) away from the back plate (4) is the adjustable groove wall (11); the adjustable groove wall (11) is provided with the flash gap monitoring module (7), and the flash gap monitoring module (7) includes multiple ranging units arranged vertically. The adjustable groove wall (11) is provided with a groove width measuring unit (61), and the groove width measuring units (61) on the two relatively parallel limiting grooves (1) constitute the component full length detection module (6). The component foot inward and outward turning detection module (8) and the inward and outward turning adjustment module are respectively provided on both sides of the middle frame (2). The component foot inward and outward turning detection module (8) and the inward and outward turning adjustment module located on the same side of the groove wall are electrically connected. The component foot inward and outward turning detection module (8) is located on both sides of the groove wall of the limiting groove (1). The component foot inward and outward turning detection module (8) includes two measuring units arranged vertically. The inward and outward turning adjustment module is provided with multiple adjustment units (9), including an outward turning adjustment unit located on both sides of the groove wall of the limiting groove (1), and an inward turning adjustment unit located on both outer side walls of the upper pressure strip (51). When the upper pressure strip (51) extends into the fitting groove, its two outer side walls are respectively parallel to the inner side groove wall of the fitting groove. The adjustment unit (9) includes a top pressing member (91) that contacts the corner edges on both sides of the middle frame (2). The top pressing member (91) is connected to the output end of the adjustment mechanism. The top pressing member (91) is vertically telescopically extended relative to its plane. The top pressing member (91) is adjusted by moving along the depth direction of the limiting groove (1).

2. The high-precision automatic pressing device for backplane assembly according to claim 1, characterized in that: The back panel positioning device (3) includes several positioning units (31) and several supporting units (32). The positioning end of the positioning unit (31) is inserted into the positioning function hole on the back panel (4). The supporting surface of the supporting unit (32) is attached to the bottom side of the back panel (4). The positioning unit (31) and the supporting unit (32) are both raised and lowered relative to the groove opening plane of the limiting groove (1).

3. The high-precision automatic pressing device for backplane assembly according to claim 1, characterized in that: The two ranging units of the component foot inward and outward turning detection module (8) are located at both ends of the moving adjustment path of the top pressure member (91).

4. The pressing method of the high-precision automatic pressing device for backplane assembly according to any one of claims 2-3, characterized in that, Includes the following steps: S1. Place the middle frame in the limiting groove and use the component foot inward and outward turning detection module (8) to detect whether the two sides of the middle frame are turned inward and outward. If there is an inward and outward turning situation, trigger the adjustment unit (9) at the corresponding position to perform top pressure adjustment until the inward and outward turning is adjusted to within the allowable error range. S2. Raise multiple positioning units (31) and multiple supporting units (32) to a certain height, align and insert the back plate with the positioning units and place it on the supporting unit, and lower multiple positioning units and supporting units simultaneously until the back plate and the middle frame are in corresponding contact. S3. Pressure is applied by the pressure end of the pressure application mechanism (5) to the edge of the back panel and the middle frame until they are pressed together and pressure is maintained for a period of time to complete the pressing action; during the process, the changes in the overall length of the component, the gap, and the inward and outward turning state of the feet are monitored in real time. When there is a defect in the entire length and there is an outward change, the outward change is adjusted first. After adjusting to a state without outward change, the adjustment of the corresponding limit groove adjustable groove wall (11) is triggered according to the type of defect in the entire length. When the entire length is reached, the adjustable groove wall (11) in the corresponding length direction slides inward for adjustment; When the total length is small, the adjustable groove wall (11) in the corresponding length direction slides outward for adjustment; When the gap is greater than the preset value range, the adjustable groove wall (11) at the corresponding position slides inward to adjust; When the gap is smaller than the preset value range, the adjustable groove wall (11) at the corresponding position slides outward to adjust; When the total length is long and the gap is at the lower limit of the pre-defined range, or the total length is short and the gap is at the upper limit of the pre-defined range, and there is no inward or outward flipping, the back panel is judged to be defective, the pressing action is terminated, and the back panel is lifted by the support unit to separate it from the middle frame. S4. The finished component that has been pressed is lifted off the limiting groove by the supporting unit to complete the demolding and unloading action.

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