A screw automatic locking device, screw automatic locking system and method

Abstract

The application discloses a screw automatic locking equipment, a screw automatic locking system and a method, and is applied to the technical field of electronic equipment screw locking. The screw automatic locking equipment comprises an electric screwdriver locking device. The electric screwdriver locking device comprises an electric screwdriver, an electric screwdriver mounting plate, an electric screwdriver locking guide sleeve, a limiting connecting piece and an elastic component. The electric screwdriver locking guide sleeve is fixedly connected with the electric screwdriver and movably arranged on the electric screwdriver mounting plate. The limiting connecting piece is arranged on the electric screwdriver mounting plate and can slide relative to the stroke limiting hole to limit the relative movement stroke of the electric screwdriver locking guide sleeve and the electric screwdriver mounting plate. One end of the elastic component is in abutment with the electric screwdriver locking guide sleeve, and the other end is in abutment with the electric screwdriver mounting plate. The provided equipment can guarantee the reliability of the electric screwdriver, reduce the damage to the parts or screws to be processed, improve the processing efficiency, reduce the processing cost and facilitate the operation.

Description

Technical Field

[0001] This invention relates to the field of screw fastening technology for electronic devices, and in particular to an automatic screw fastening device, an automatic screw fastening system, and a method. Background Technology

[0002] Liquid-cooled electronic devices, such as those for GPUs (Graphics Processing Units), have become core components supporting various network services, data processing, and business operations. The manufacturing process for the cold plate of the GPU module within these liquid-cooled electronic devices is highly sophisticated and expensive, and it needs to be secured to the GPU module to provide heat dissipation and cooling support. In this context, the use of mass-produced intelligent fastening screws is crucial.

[0003] In related technologies, the production and assembly process of GPU module cold plates relies on operators manually tightening each screw with a single ordinary electric screwdriver. However, due to high operator turnover and inexperienced workers, issues such as stripped screws, screwdriver slippage, and inability to record and trace torque data may occur during the tightening process. This low efficiency increases the risk of product failure rates during testing, impacting the quality and timely delivery of electronic equipment. Furthermore, operator fatigue leads to higher product defect rates, thereby increasing production costs.

[0004] Therefore, how to effectively improve the installation efficiency of cold plates and reduce the failure rate is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic screw fastening device, automatic screw fastening system and method to improve the installation efficiency of cold plates on GPU modules, with low failure rate and convenient operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] An automatic screw fastening device includes an electric screwdriver fastening device, comprising: an electric screwdriver for fastening screws on a workpiece; an electric screwdriver mounting plate for moving the electric screwdriver toward or away from the screw, the electric screwdriver being movably mounted on the mounting plate; an elastic member, one end abutting against the electric screwdriver and the other end abutting against the mounting plate, wherein when the mounting plate moves the electric screwdriver to abutting the screw, the mounting plate can continue to move toward the screw to compress the elastic member; a position detection component disposed on the mounting plate and / or the electric screwdriver, the distance detection component being used to obtain the relative position between the mounting plate and the electric screwdriver; and a controller connected to the position detection component and the electric screwdriver, the controller being used to send a running signal to the electric screwdriver when the relative position between the mounting plate and the electric screwdriver is a target position, so that the electric screwdriver enters an operable mode.

[0008] An automatic screw fastening system includes an automatic screw fastening device; it also includes a fixed bracket, an automatic lifting and return plate machine, a double-speed chain conveyor line, and a support carrier. The fixed bracket is disposed beside the double-speed chain conveyor line, the automatic screw fastening device is disposed on the fixed bracket, and the automatic lifting and return plate machine is used to place or remove the part to be processed from the support carrier. The support carrier is disposed on the double-speed chain conveyor line and is used to carry the part to be processed. The double-speed chain conveyor line is also provided with a blocking component and a lifting component. When the support carrier moves to a target area corresponding to the fixed bracket, the blocking component blocks the support carrier, and the lifting component lifts the part to be processed.

[0009] An automatic screw fastening method includes the following steps: when the workpiece to be processed moves to the target area, the electric screwdriver is controlled to move to the position corresponding to the screw on the workpiece, and the mounting plate of the electric screwdriver continues to press down; when the relative position between the mounting plate of the electric screwdriver and the screw fastening guide sleeve of the electric screwdriver is the target position, a running signal is sent to the electric screwdriver to enable the electric screwdriver to enter the operable mode; a start signal is sent to the electric screwdriver, and the screwdriver bit rotates; when the torque value of the screwdriver bit is greater than or equal to the target torque value, the electric screwdriver is controlled to stop operating, and the number of successful screw fastenings is recorded; when the number of successful screw fastenings is less than the target number, and the electric screwdriver is moved out of the target area, a warning signal is issued.

[0010] The automatic screw fastening device provided by this invention has the following advantages: Through the setting of the electric screwdriver fastening device, the electric screwdriver mounting plate in the device supports and fixes the electric screwdriver with the help of the electric screwdriver fastening guide sleeve. The electric screwdriver fastening guide sleeve is fixedly connected to the electric screwdriver and is slidably set relative to the electric screwdriver mounting plate. When the electric screwdriver mounting plate moves, it can drive the electric screwdriver to move synchronously. When the electric screwdriver moves to the position corresponding to the screw, the screwdriver bit touches the screw, and then the electric screwdriver mounting plate is pressed further. Due to the electric screwdriver mounting plate… An elastic component is provided between the mounting plate and the electric screwdriver mounting guide sleeve. When the mounting plate is pressed further, the elastic component will be compressed. Since the electric screwdriver mounting guide sleeve has a travel limit hole and the mounting plate is equipped with a limit connector, the mounting plate can no longer move down when it moves to the bottom of the limit connector and the travel limit hole. At this time, it indicates that the screwdriver bit has tightened the screw, and the electric screwdriver can be turned on to perform the locking work, ensuring the locking work is safe and reliable.

[0011] The automatic screw fastening device provided by this invention can ensure the reliability of electric screwdrivers, reduce damage to the parts or screws to be processed, improve processing efficiency, reduce processing costs, and facilitate operation.

[0012] In one embodiment, the system further includes electric screwdriver control handles mounted on the electric screwdriver mounting plate. There are at least two electric screwdriver control handles, located on the left and right sides of the mounting plate, respectively. Each control handle has a button connected to a controller. The controller sends a start signal to the screwdriver when all buttons on the control handles are pressed. Upon receiving the start and start signals, the screwdriver controls the screwdriver bit to rotate. This configuration facilitates adjustment of the mounting plate's position and allows for easy operation by placing buttons on the control handles. Furthermore, by using at least two control handles, a start signal is only sent to the screwdriver when all buttons on the control handles are pressed, preventing accidental activation and improving reliability.

[0013] The automatic screw fastening system provided by the present invention includes the aforementioned automatic screw fastening device. Since the aforementioned automatic screw fastening device has the above-mentioned technical effects, the automatic screw fastening system with the aforementioned automatic screw fastening device should have the same technical effects.

[0014] The automatic screw fastening method provided by this invention, through automatic control of the workpiece to be processed, automatically stops when the workpiece moves to the target area corresponding to the fixed bracket, without manual intervention. Then, the electric screwdriver is manually controlled to move to the position corresponding to the screw and continues to press down the electric screwdriver mounting plate. When the relative position between the electric screwdriver mounting plate and the electric screwdriver fastening guide sleeve is the target position, the electric screwdriver receives a start signal and enters a standby state. Then, the electric screwdriver automatically detects the torque value of the screwdriver bit to determine whether the assembly of the corresponding screw is completed. After the assembly of one screw is completed, the torque value of the electric screwdriver is recorded. The system detects the number of successfully tightened screws. When the number of successfully tightened screws by the electric screwdriver is less than the target number, and the electric screwdriver is moved out of the target area, a warning signal is issued. That is, when the electric screwdriver has not completed the assembly of all screws and is moved out of the target area, a warning signal is issued to prompt the operator to tighten the remaining screws. This avoids the problem of some screws on the workpiece being taken off the production line without being tightened due to human calculation errors. The warning signal will not be issued only when the number of successfully tightened screws by the electric screwdriver is greater than or equal to the target number and the electric screwdriver is moved out of the target area. This ensures the processing reliability of the workpiece and improves the yield rate. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of an automatic screw fastening system production line provided in an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the installation and fixing of the automatic screw fastening system provided in an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the assembly of the support carrier and the component to be processed in the automatic screw fastening system provided in the embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the design scheme of the automatic screw fastening device provided in an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the working state of the automatic screw fastening device provided in an embodiment of the present invention.

[0021] Figure 6 This is an exploded view of the automatic screw fastening device provided in an embodiment of the present invention.

[0022] Figure 7 for Figure 4 The enlarged view of part A of the automatic screw fastening device shown.

[0023] Figure 8 This is a schematic diagram of the electric screwdriver fastening device in the automatic screw fastening equipment provided in an embodiment of the present invention.

[0024] Figure 9 This is a front view of the automatic screw fastening device provided in an embodiment of the present invention.

[0025] Figure 10 for Figure 9 The figure shows a BB cross-sectional view of the automatic screw fastening device.

[0026] Figure 11-1 for Figure 10 The diagram shows the structure of the elastic component in the automatic screw fastening device.

[0027] Figure 11-2 for Figure 10 The image shows a side view of the electric screwdriver fastening guide sleeve in the automatic screw fastening device.

[0028] Figure 12 The flowchart illustrates the automatic screw fastening method provided by this invention.

[0029] Figure 13 This is a schematic diagram of a specific embodiment of the automatic screw fastening method provided by the present invention.

[0030] Figure reference numerals: 1-Automatic lifting and recirculation return plate machine; 2-Operator; 3-Multi-speed chain conveyor; 4-Support carrier; 5-Liquid-cooled electronic equipment; 501-Electronic equipment outer casing; 502-Cold plate; 503-GPU module; 6-Fixed bracket; 7-Automatic screw fastening equipment; 701-Device fixed support assembly; 701-1-Fixed end plate; 701-2-Angle rib support; 701-3-Fixed support base plate; 702-Balancer guide shaft support assembly; 702-1-Balancer flange support; 702-2-Balancer guide shaft; 702-3-Guide shaft top support; 703-Bearing housing sleeve; 704-Balancer tension spring; 705-Device top fixed seat; 705-1-Top support fixed plate; 705 -2-Top corner rib; 705-3-Top fixed end plate; 705-4-Guide kit; 706-Sliding sleeve cantilever beam; 707-Electric screwdriver fixing beam; 708-Electric screwdriver locking device; 708-1-Electric screwdriver; 708-2-Electric screwdriver control handle; 708-2-1-Start button; 708-2-2-Reset button; 708-3-Electric screwdriver mounting plate; 708-4-Limit ring; 708-5-Bushing; 708-6-Limit connector; 708-7-Elastic component; 708-8-Electric screwdriver locking guide sleeve; 708-8-1-Stroke limit hole; 708-9-Screwdriver bit; 708-10-Handle fixing seat; 708-11-Position detection component; 708-12-Threaded part; 8-Display screen; 9-Controller. Detailed Implementation

[0031] The core of this invention is to provide an automatic screw fastening device, an automatic screw fastening system and method, which can realize the automatic fastening of cold-rolled steel plate screws, thereby improving efficiency and operational accuracy.

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present invention.

[0033] It should be noted that the terms "center," "vertical direction," "lateral direction," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. The terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal connection of two elements. The terms "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, where the range of similarity is within an acceptable deviation range, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity, i.e., the limitations of the measurement system. For example, "parallel" includes absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism can be, for example, within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, where the acceptable deviation range for approximate equality can be, for example, the difference between the two equal items being less than or equal to 5% of either one. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] In this implementation, please refer to Figure 6 , Figure 10 , Figure 11-1 and Figure 11-2 The automatic screw fastening device 7 includes an electric screwdriver fastening device 708, which includes an electric screwdriver 708-1, an electric screwdriver mounting plate 708-3, an electric screwdriver fastening guide sleeve 708-8, a limit connector 708-6, and an elastic component 708-7.

[0036] Electric screwdriver 708-1, used to tighten screws on parts to be processed, such as... Figure 3As shown, the component to be processed can be a liquid-cooled electronic device 5. The liquid-cooled electronic device 5 includes an electronic device outer casing 501, a cold plate 502, and a GPU module 503. Screws are used to fix the cold plate 502 to the GPU module 503. The electronic device can be a server. Of course, the component to be processed can also be other structures. The electric screwdriver mounting plate 708-3 is used to drive the electric screwdriver 708-1 to move towards or away from the screw.

[0037] The electric screwdriver locking guide sleeve 708-8 is fixedly connected to the electric screwdriver 708-1. The electric screwdriver locking guide sleeve 708-8 is movably mounted on the electric screwdriver mounting plate 708-3. The axial direction of the electric screwdriver locking guide sleeve 708-8 is perpendicular to the surface of the electric screwdriver mounting plate 708-3, and the axial direction of the electric screwdriver locking guide sleeve 708-8 is provided with a travel limiting hole 708-8-1. Specifically, the travel limiting hole 708-8-1 can be a strip-shaped hole or an oblong hole, and any shape that can limit the movement of the limiting connector 708-6 is acceptable.

[0038] The limiting connector 708-6 is disposed on the electric screwdriver mounting plate 708-3, and one end of the limiting connector 708-6 extends into the travel limiting hole 708-8-1. The limiting connector 708-6 can slide relative to the travel limiting hole 708-8-1 to limit the relative movement travel between the electric screwdriver locking guide sleeve 708-8 and the electric screwdriver mounting plate 708-3. The limiting connector can be a limiting pin for easy assembly.

[0039] The elastic component 708-7 has one end abutting against the electric screwdriver locking guide sleeve 708-8 and the other end abutting against the electric screwdriver mounting plate 708-3. When the electric screwdriver mounting plate 708-3 moves the electric screwdriver 708-1 to abut against the screw, the electric screwdriver mounting plate 708-3 can continue to move toward the screw to compress the elastic component 708-7 until the limit connector 708-6 engages with the bottom of the travel limit hole 708-8-1.

[0040] Specifically, such as Figure 5As shown, the electric screwdriver 708-1 is equipped with a screwdriver bit 708-9. By cooperating with the screw, the screwdriver bit 708-9 rotates to complete the forward or reverse rotation of the screw, thereby completing the assembly or disassembly of the screw. The part to be processed can be the cold plate 502 of electronic equipment, such as the GPU module 503 cold plate 502 of liquid-cooled electronic equipment 5. The electric screwdriver mounting plate 708-3 can be provided with several mounting holes, and each electric screwdriver 708-1 is correspondingly set in one mounting hole. The elastic member 708-7 can be a spring. The electric screwdriver 708-1 can slide relative to the electric screwdriver mounting plate 708-3. During the sliding process, the elastic member 708-7 is compressed. When the electric screwdriver mounting plate 708-3 loses the external force, the elastic member 708-7 undergoes elastic deformation, which can push the electric screwdriver mounting plate 708-3 to return to its original position. In this electric screwdriver mounting device 708, the electric screwdriver mounting plate 708-3 supports the electric screwdriver 708-1 via the electric screwdriver mounting guide sleeve 708-8. When the electric screwdriver mounting plate 708-3 moves, it can drive the electric screwdriver 708-1 to move synchronously. When the electric screwdriver 708-1 moves to the position corresponding to the screw, the screwdriver bit 708-9 of the electric screwdriver 708-1 touches the screw. Then, the electric screwdriver mounting plate 708-3 is pressed further down. Since there is an elastic component 708-7 between the electric screwdriver mounting plate 708-3 and the electric screwdriver mounting guide sleeve 708-8, the elastic component is compressed when the electric screwdriver mounting plate 708-3 is pressed further down. Component 708-7; Because the electric screwdriver locking guide sleeve 708-8 has a travel limit hole 708-8-1, and the electric screwdriver mounting plate 708-3 is equipped with a limit connector 708-6, under the action of the limit connector 708-6, when the electric screwdriver mounting plate 708-3 moves to the bottom of the limit connector 708-6 and the travel limit hole 708-8-1, the electric screwdriver mounting plate 708-3 can no longer move down. At this time, it indicates that the screwdriver bit 708-9 of the electric screwdriver 708-1 has tightened the screw, and the electric screwdriver 708-1 can be turned on to perform the locking work, ensuring the safe and reliable performance of the locking work. This automatic screw locking device 7 ensures the reliability of the electric screwdriver 708-1, reduces damage to the workpiece or screw to be processed, improves processing efficiency, reduces processing costs, and facilitates operation.

[0041] Furthermore, the electric screwdriver locking guide sleeve 708-8 is detachably fixed to the electric screwdriver 708-1. The electric screwdriver locking guide sleeve 708-8 is detachably connected to the electric screwdriver 708-1. After the electric screwdriver locking guide sleeve 708-8 is first installed on the electric screwdriver mounting plate 708-3, the electric screwdriver 708-1 is then assembled onto the electric screwdriver locking guide sleeve 708-8. After use, the electric screwdriver 708-1 can also be removed from the electric screwdriver locking guide sleeve 708-8. The electric screwdriver locking guide sleeve 708-8 can be fixed to the electric screwdriver 708-1 through a threaded structure, making disassembly and assembly convenient. The electric screwdriver locking guide sleeve 708-8 is movably installed on the electric screwdriver mounting plate 708-3, and the axial direction of the electric screwdriver locking guide sleeve 708-8 is perpendicular to the electric screwdriver mounting plate 708-3, while the axial direction of the electric screwdriver locking guide sleeve 708-8 is coaxial with that of the electric screwdriver 708-1, making operation convenient.

[0042] In some embodiments, to limit the positioning of the electric screwdriver mounting plate 708-3 and the electric screwdriver locking guide sleeve 708-8, the electric screwdriver locking device 708 further includes a limiting ring 708-4. The limiting ring 708-4 can be a snap ring limiting ring 708-4, which is annular and surrounds the periphery of the electric screwdriver locking guide sleeve 708-8. The limiting ring 708-4 and the electric screwdriver locking guide sleeve 708-8 can be interference-fitted. 08-4 is located on the upper part of the electric screwdriver locking guide sleeve 708-8, and the elastic component 708-7 is located on the lower part of the electric screwdriver locking guide sleeve 708-8. The bottom of the electric screwdriver locking guide sleeve 708-8 has a limiting protrusion for limiting the elastic component 708-7. The limiting protrusion can be an annular boss, and the elastic component 708-7 can be a spring, which is sleeved on the electric screwdriver locking guide sleeve 708-8. The electric screwdriver mounting plate 708-3 is located on the limiting ring 708-4. Between the elastic component 708-7 and the screw, one end of the elastic component 708-7 abuts against the limiting protrusion of the electric screwdriver locking guide sleeve 708-8, and the other end abuts against the bottom surface of the electric screwdriver mounting plate 708-3. When the electric screwdriver mounting plate 708-3 moves downward relative to the electric screwdriver locking guide sleeve 708-8, it compresses the elastic component 708-7. When the electric screwdriver 708-1 is disengaged from the screw, the elastic component 708-7 returns to its original position, pushing the electric screwdriver 708-1. The electric screwdriver locking guide sleeve 708-8 moves downward until the limiting ring 708-4 abuts against the electric screwdriver mounting plate 708-3. The limiting ring 708-4 and the limiting protrusion can limit the electric screwdriver mounting plate 708-3 and the elastic component 708-7 respectively, preventing the elastic component 708-7 from coming off the electric screwdriver locking guide sleeve 708-8, and at the same time preventing the electric screwdriver locking guide sleeve 708-8 from falling off the electric screwdriver mounting plate 708-3.

[0043] In some embodiments, the bottom inner side of the electric screwdriver locking guide sleeve 708-8 is provided with a stepped portion, and the inner circumferential surface of the stepped portion is provided with a threaded portion 708-12. The electric screwdriver locking guide sleeve 708-8 is threadedly connected to the electric screwdriver 708-1 through the threaded portion 708-12, which facilitates the disassembly and fastening of the two and makes operation convenient.

[0044] In some embodiments, the extending direction of the limiting connector 708-6 is parallel to the electric screwdriver mounting plate 708-3, and one end of the limiting connector 708-6 penetrates the side wall of the electric screwdriver locking guide sleeve 708-8. Specifically, the limiting connector 708-6 can be horizontally mounted on the electric screwdriver mounting plate 708-3, and one end of the limiting connector 708-6 is provided with a limiting platform. The limiting platform of the limiting connector 708-6 is engaged with the side wall of the electric screwdriver mounting plate 708-3, and the end of the limiting connector 708-6 away from the limiting platform can penetrate the electric screwdriver mounting plate 708-3 and extend to the position of the electric screwdriver locking guide sleeve 708-8. Further, the electric screwdriver locking guide sleeve 708-8 is provided with a travel limiting hole 70. 8-8-1, the end of the limiting connector 708-6 is placed inside the travel limiting hole 708-8-1. The limiting connector 708-6 can slide relative to the travel limiting hole 708-8-1 to limit the relative movement stroke of the electric screwdriver locking guide sleeve 708-8 and the electric screwdriver mounting plate 708-3. That is, the length of the travel limiting hole 708-8-1 is the stroke of the limiting connector 708-6, which is the relative movement stroke of the electric screwdriver locking guide sleeve 708-8 and the electric screwdriver mounting plate 708-3. In actual use, the relative movement stroke of the electric screwdriver locking guide sleeve 708-8 and the electric screwdriver mounting plate 708-3 can be changed by replacing different models of electric screwdriver locking guide sleeve 708-8, thereby improving the applicability.

[0045] In some embodiments, the device further includes: a position detection component 708-11, disposed on the electric screwdriver mounting plate 708-3 and / or the electric screwdriver 708-1; the distance detection component is used to obtain the relative position between the electric screwdriver mounting plate 708-3 and the electric screwdriver 708-1; a controller 9, connected to the position detection component 708-11 and the electric screwdriver 708-1; the controller 9 is used to send a running signal to the electric screwdriver 708-1 when the relative position between the electric screwdriver mounting plate 708-3 and the electric screwdriver 708-1 is the target position, so that the electric screwdriver 708-1 enters an operable mode; the electric screwdriver 708-1 starts after receiving the running signal and the start signal.

[0046] Specifically, the position detection component 708-11 can be a distance sensor, a position sensor, or other components. The position detection component 708-11 can detect the relative position of the electric screwdriver mounting plate 708-3 and the electric screwdriver 708-1. The electric screwdriver 708-1 will only start after receiving both a running signal and a start signal. The running signal is sent to the electric screwdriver 708-1 by the controller 9, while the start signal can be sent by the operator 2 or the operator 2 can directly touch the start switch of the electric screwdriver 708-1 to start the electric screwdriver 708-1. When the electric screwdriver 708-1 does not receive the running signal sent by the controller 9, it will not start even if it receives the start signal.

[0047] Simultaneously, the relative position between the electric screwdriver mounting plate 708-3 and the electric screwdriver 708-1 changes. The position of the electric screwdriver 708-1 remains unchanged, while the mounting plate 708-3 moves closer to the screw on the electric screwdriver 708-1. This indicates that the electric screwdriver 708-1 has applied sufficient pressure to the screw, meeting the screw assembly requirements. Then, based on the detection results from the position detection component 708-11, the controller 9 sends a running signal to the electric screwdriver 708-1 when the relative position between the mounting plate 708-3 and the electric screwdriver locking guide sleeve 708-8 is the target position. At this point, a start signal can be sent to the electric screwdriver 708-1 manually or automatically. Only when the electric screwdriver 708-1 receives both the running signal and the start signal... The electric screwdriver 708-1 will only be activated after receiving two signals. In this application, the position detection component 708-11 and the controller 9 ensure that the electric screwdriver 708-1 can only be activated when the relative position between the electric screwdriver mounting plate 708-3 and the electric screwdriver locking guide sleeve 708-8 is at the target position. This guarantees the reliability of the electric screwdriver 708-1 and prevents it from being activated due to accidental operation before it is properly tightened with the screw, which could damage the workpiece or screw. Furthermore, the elastic component 708-7 provides a buffer, preventing hard collisions between the electric screwdriver 708-1 and the screw, which could damage the screw. This electric screwdriver locking device 708 can automatically detect the relative position between the electric screwdriver mounting plate 708-3 and the electric screwdriver 708-1.

[0048] In some embodiments, there are multiple electric screwdrivers 708-1, each mounted on the same electric screwdriver mounting plate 708-3. The electric screwdriver mounting plate 708-3 may have multiple mounting holes. The position detection component 708-11 is a distance sensor, mounted on the electric screwdriver mounting plate 708-3, and the number of distance sensors is the same as the number of electric screwdrivers 708-1, with each corresponding to the other. Specifically, the bottom of the electric screwdriver mounting plate 708-3 may have a boss, and each position detection component 708-1 can be positioned facing its corresponding electric screwdriver 708-1. Specifically, the position detection component 708-11 can determine the relative position between the electric screwdriver mounting plate 708-3 and the electric screwdriver 708-1 by detecting the relative position between the limiting protrusion of the electric screwdriver mounting plate 708-3 and the electric screwdriver locking guide sleeve 708-8, thus facilitating operation.

[0049] In some embodiments, the electric screwdriver locking device 708 further includes a bushing 708-5, which is fixed in the mounting hole. The electric screwdriver locking guide sleeve 708-8 slides with the bushing 708-5. The bushing 708-5 can be a brass bushing 708-5. The electric screwdriver locking guide sleeve 708-8 has a low coefficient of friction with the bushing 708-5, making it easy to slide and providing a long service life.

[0050] In some embodiments, the electric screwdriver mounting device 708 further includes an electric screwdriver control handle 708-2, which is mounted on the electric screwdriver mounting plate 708-3. There are at least two electric screwdriver control handles 708-2, located on the left and right sides of the electric screwdriver mounting plate 708-3, respectively. Figure 9 As shown, the electric screwdriver control handle 708-2 is equipped with a button, which is connected to the controller 9. The controller 9 sends a start signal to the electric screwdriver 708-1 when all the buttons on the electric screwdriver control handles 708-2 are pressed. After receiving the run signal and the start signal, the electric screwdriver 708-1 controls the screwdriver bit 708-9 to rotate. This configuration, through the electric screwdriver control handles 708-2, not only facilitates the adjustment of the position of the electric screwdriver mounting plate 708-3, but also makes it convenient for the operator 2 to press and operate the screwdriver, thus improving ease of use. Furthermore, by setting at least two electric screwdriver control handles 708-2, a start signal is only sent to the electric screwdriver 708-1 when all the buttons on the electric screwdriver control handles 708-2 are pressed, preventing accidental activation by the operator 2 and improving reliability. Specifically, the buttons include a reset button 708-2-2 and a start button 708-2-1. The start button 708-2-1 is used to send a start signal to the electric screwdriver 708-1 to complete the screw fastening process. The reset button 708-2-2 is used to rotate the screw in the reverse direction to complete the screw removal process.

[0051] In some implementation methods, please refer to Figure 4 It also includes a beam assembly, a fixing device, and a sliding device. The screw is located on the part to be processed. The beam assembly is located between the electric screwdriver mounting plate 708-3 and the sliding device. The beam assembly is set on the sliding device, and the sliding device is set on the fixing device, so that the electric screwdriver mounting plate 708-3 can slide vertically and translate horizontally relative to the fixing device. In the above configuration, the fixing device, mounted on the fixed bracket 6 of the automatic screw fastening system, serves as the main support. The sliding device can slide vertically relative to the fixing device, thereby adjusting the vertical position of the automatic screw fastening device 7. Through the beam assembly, the horizontal position of the automatic screw fastening device 7 is adjusted by its horizontal translation. This allows the automatic screw fastening device 7 to be adjusted to any position within the target area. Furthermore, since the automatic screw fastening device 7 can only slide vertically and translate horizontally, it will not swing, ensuring smooth contact between the device and the screw. This guarantees that the electric screwdriver 708-1 within the device remains vertical, ensuring both processing efficiency and positional accuracy.

[0052] In some embodiments, the beam assembly includes an electric screwdriver fixing beam 707 and a sliding sleeve cantilever beam 706. The electric screwdriver fixing beam 707 is hinged to the sliding sleeve cantilever beam in the horizontal direction. An electric screwdriver mounting plate 708-3 is mounted on the electric screwdriver fixing beam 707. The sliding sleeve cantilever beam 706 is mounted on a sliding device. When the sliding device slides in the vertical direction, it drives the electric screwdriver fixing beam 707 and the sliding sleeve cantilever beam 706 to move in the vertical direction, which facilitates operation.

[0053] In some embodiments, the fixing device includes a device fixing support assembly 701, a balancer guide shaft support assembly 702, and a device top fixing seat 705. The device fixing support assembly 701 and the device top fixing seat 705 are respectively used to be installed on the top and bottom of the fixing bracket 6 of the automatic screw fastening system. The balancer guide shaft support assembly 702 is located between the device fixing support assembly 701 and the device top fixing seat 705, and the sliding device is slidably installed on the balancer guide shaft support assembly 702. Specifically, the device fixing support assembly 701 includes a fixing end plate 701-1, a corner rib support member 701-2, and a fixing support base plate 701-3. Two corner brace supports 701-2 are simultaneously locked to the fixed end plate 701-1 and the fixed support base plate 701-3 respectively using hex socket head cap screws, increasing the overall structural rigidity of the device fixed support assembly 701; the fixed end plate 701-1 can be an aluminum profile end plate, which is lightweight and has high strength; the fixed end plate 701-1 is directly locked to the end face of the fixed bracket 6 using hex socket head cap screws and special ball bearing nuts to ensure stability; the balancer guide shaft support assembly 702 includes a balancer flange support 702-1, a balancer guide shaft 702-2, and a guide shaft top support 702-3. 02-3, the bottom of the balancer guide shaft 702-2 is inserted into the center hole of the balancer flange support 702-1, and the balancer flange support 702-1 is locked with an Allen screw to fix the balancer guide shaft 702-2; the top of the balancer guide shaft 702-2 is fixed with the guide shaft top support 702-3, and an Allen screw is passed through the center hole of the guide shaft top support 702-3 and screwed into the top threaded hole of the balancer guide shaft 702-2; the entire balancer guide shaft support assembly 702 is fixed to the flange plane of the device fixing support assembly 701 with Allen screws.

[0054] Furthermore, the top mounting base 705 of the device includes a top support mounting plate 705-1, a top corner rib 705-2, a top fixing end plate 705-3, and a guide assembly 705-4, which can be a cylindrical structure. The top support mounting plate 705-1 is simultaneously assembled with the top corner rib 705-2 and the top fixing end plate 705-3 using hexagon socket screws to form an L-shaped fixing bracket. The guide assembly 705-4 has two threaded holes on its upper surface, which are precisely used to fix it to the top support mounting plate 705-1 using hexagon socket screws. The limiting hole 708-8-1 has an adjustable size assembly design; the lower end face of the guide assembly 705-4 has a countersunk hole, and the corresponding positioning hole is inserted into the cylindrical boss of the top support 702-3 of the guide shaft. The top fixed end plate 705-3 is fixed to the fixed bracket 6 with hexagonal screws and special aluminum profile ball nuts. In order to ensure the verticality accuracy requirements of the balancer guide shaft support assembly 702, the position and spacing of the guide assembly 705-4 in the fixed stroke limiting hole 708-8-1 of the top support fixed plate 705-1 are finely adjusted.

[0055] In some embodiments, the sliding device includes a bearing housing sleeve 703 and a balancer tension spring 704. The bearing housing sleeve 703 is slidably sleeved on the balancer guide shaft support assembly 702. The free end of the balancer tension spring 704 is connected to the bearing housing sleeve 703, and the balancer tension spring 704 is positionally adjustable on the balancer guide shaft support assembly 702 to adjust the downward pressing force of the bearing housing sleeve 703. Specifically, the bearing housing sleeve 703 is installed in the balancer guide shaft 702-2 on the balancer guide shaft support assembly 702 via an internal ball bushing 708-5, allowing it to slide up and down along the balancer guide shaft 702-2. The upper end face of the bearing housing sleeve 703 is limited by the top support 702-3 of the guide shaft, and the lower end face of the bearing housing sleeve 703 is limited by the balancer flange support 702-1, ensuring that the bearing housing sleeve 703 can only slide within a specific range. The balancer tension spring 704 is fixed to the annular ring of the top support 702-3 of the guide shaft via a hook, and the other end of the hook is fixed to the bearing housing sleeve 703. When the bearing housing sleeve 703 slides downward, the balancer tension spring 704 always provides an upward tension, and the balancer tension spring can be manually rotated. A knob on one side of spring 704 allows for flexible adjustment of the tension of the balancer spring 704 to meet the comfort requirements of operator 2. The right end of the sliding sleeve cantilever beam 706 is fixed to the corresponding threaded hole of the bearing housing sliding sleeve 703 using an internal hexagon screw. The left end of the sliding sleeve cantilever beam 706 has a pin with threaded holes on its upper and lower end faces, which is fixed by limiting and locking through the upper and lower end plates. Furthermore, the right end bushing 708-5 of the electric screwdriver fixing beam 707 is fixed to the sliding sleeve cantilever beam 706, and the left end of the electric screwdriver fixing beam 707 is locked to the electric screwdriver locking device 708. Of course, the sliding sleeve cantilever beam 706 and the electric screwdriver fixing beam 707 can be customized with different lengths according to actual production needs, extending with different arm spans to adapt to production application scenarios.

[0056] Specifically, in one embodiment, the electric screwdriver locking device 708 includes an electric screwdriver 708-1, an electric screwdriver control handle 708-2, an electric screwdriver mounting plate 708-3, a limiting ring 708-4, a bushing 708-5, a limiting connector 708-6, an elastic component 708-7, an electric screwdriver locking guide sleeve 708-8, a screwdriver bit 708-9, a handle fixing seat 708-10, and a position detection component 708-11; the electric screwdriver mounting plate 708-3 is locked to the left end of the electric screwdriver fixing beam 707 by screws, and the two electric screwdriver control handles 708-2 are respectively locked to the handle fixing seat 708-10 using hex socket screws, as shown. Figure 8 As shown; the two handle mounting bases 708-10 are secured to the two end faces of the electric screwdriver mounting plate 708-3 using hex socket screws, as shown. Figure 7As shown; the bushing 708-5 is tightly fitted into the mounting holes of the electric screwdriver mounting plate 708-3 via an interference fit, and the mounting end faces are flush with each other; each elastic component 708-7 is respectively fitted onto the outer circle of the corresponding electric screwdriver locking guide sleeve 708-8, and is limited by the protruding design of the bottom end face of the electric screwdriver locking guide sleeve 708-8 to prevent the elastic component 708-7 from falling off. For example, there can be four sets of assembly; and the electric screwdriver locking guide sleeve 708-8 is secured with a 0.01mm clearance fit. The assembly consists of four sets, housed in bushing 708-5. Four electric screwdrivers 708-1 are respectively secured to four electric screwdriver locking guide sleeves 708-8, threaded together, and thread-locking adhesive is applied to prevent the electric screwdrivers 708-1 from loosening. The limiting connector 708-6 penetrates the round holes of both the electric screwdriver mounting plate 708-3 and the bushing 708-5, and also penetrates the travel limiting hole 708-8-1 of the electric screwdriver locking guide sleeve 708-8. The inner end face of the push-in screwdriver 708-1 is brought into contact with the outer end face of the screwdriver mounting plate 708-3 to complete the limit installation. At this time, the stroke of the entire telescopic elastic component 708-7 of the screwdriver 708-1 is determined by the length of the stroke limit hole 708-8-1 designed for the screwdriver locking guide sleeve 708-8. The entire screwdriver locking device 708 has the advantages of convenient disassembly and assembly, flexible upgrade and iteration, and accurate sensor recognition. It is compatible with various screw types, and only the screwdriver bit 708-9 needs to be changed to be compatible with different screw head types. The controller 9 can be the servo system controller 9 of the screwdriver 708-1. The controller 9 provides a precision control method that is compatible with various torque, angle and speed monitoring, and provides input and output ports for work process control, as well as commonly used industrial communication interfaces. It also has an Ethernet interface for remote monitoring and remote control of the screwdriver 708-1. It also provides a dedicated host computer software program for real-time and MES (Manufacturing Execution System) communication. The system communicates with the Manufacturing Execution System (MES) to record, transmit, alarm, and trace data for the four screws on the cold plate 502 secured by the electric screwdriver 708-1. The host computer software displays the control interface of the electric screwdriver 708-1 on the all-in-one machine's screen 8 in real time. Users can touch the screen 8 to modify the electric screwdriver 708-1's operating mode, process parameters, network communication, and data query functions. The entire sliding sleeve cantilever beam 706, electric screwdriver fixing beam 707, and electric screwdriver securing device 708 can translate and rotate horizontally (XY axis). The bearing housing sliding sleeve 703 slides within the balancer guide shaft support assembly 702, creating vertical up-and-down movement (Z-axis vertical direction), which, together with the balancer tension spring 704, forms a balancing arm structure. Of course, the number of screws and the number of electric screwdrivers 708-1 can be determined according to needs or actual application scenarios, and are not limited to the method given in this embodiment.

[0057] The automatic screw fastening device 7 provided by this invention employs a limiting connector 708-6 that penetrates the circular holes of both the electric screwdriver mounting plate 708-3 and the bushing 708-5 to complete the limiting installation and provides a positioning and guiding function. The elastic component 708-7 and the electric screwdriver fastening guide sleeve 708-8 are structurally designed to buffer and flexibly release vertical pressure, and also facilitate the automatic and flexible centering of the screwdriver bit 708-9 by the rotating part of the electric screwdriver 708-1. When the two electric screwdriver control handles 708-2 are held down by both hands, the elastic component 708-7 is compressed, and the position detection component 708-11 senses the raised position signal of the electric screwdriver fastening guide sleeve 708-8 and feeds it back to the controller 9. On the one hand, holding both electric screwdriver control handles 708-2 with both hands ensures operational stability. On the other hand, the addition of a position detection component 708-11 prevents operator 2 from accidentally pressing the start button 708-2-1, which could cause the electric screwdriver 708-1 to rotate and damage the product. The start button 708-2-1 requires both hands to press, providing double protection and a foolproof function. The balancing arm makes operation more effortless, offsetting the reaction force and weight of the electric screwdriver 708-1 when it rotates to lock the screws in the cold plate 502, reducing tendon fatigue damage caused by repetitive movements for operator 2. It also solves the problem of high failure rates during aging tests in the assembly process, reducing them to below 2%.

[0058] In addition to the aforementioned automatic screw fastening device 7, this application also provides an automatic screw fastening system including the aforementioned automatic screw fastening device 7.

[0059] Please refer to Figure 1 and Figure 2 The automatic screw fastening system also includes a fixed bracket 6, an automatic lifting and return plate machine 1, a double-speed chain conveyor 3, and a support carrier 4. The automatic lifting and return plate machine 1 is used to place or remove the part to be processed from the support carrier 4. The support carrier 4 is set on the double-speed chain conveyor 3 and is used to carry the part to be processed. The double-speed chain conveyor 3 is also equipped with a blocking component and a lifting component. When the support carrier 4 moves to the target area corresponding to the fixed bracket 6, the blocking component blocks the support carrier 4, and the lifting component lifts the part to be processed. The fixed bracket 6 is used to install and fix the entire device. When the part to be processed moves to the target area corresponding to the position of the fixed bracket 6, it indicates that the part to be processed has entered the processing step. At this time, the electric screwdriver 708-1 can move to the position corresponding to the screw on the part to be processed.

[0060] In one specific embodiment, the automatic screw fastening system includes an automatic lifting and recirculating return plate machine 1, an operator 2, a double-speed chain conveyor 3, a support carrier 4, a fixed bracket 6, an electric screwdriver fastening device 708, a display screen 8, and a controller 9. The fixed bracket 6 can be an aluminum profile bracket. The double-speed chain conveyor 3 is an automatic conveyor line with up-and-down circulation. The two ends of the double-speed chain conveyor 3 are connected by the automatic lifting and recirculating return plate machine 1, which fastens together with special aluminum profile screws. The support carrier 4 is placed on the roller chain of the double-speed chain conveyor 3 for conveying and operation. The part to be processed is placed at the center above the support carrier 4. The fixed bracket 6 is fixed to the side end face of the double-speed chain conveyor 3 by ball-type nuts and screws to enhance the overall structural rigidity and stability. The electric screwdriver fastening device 708 is also fixed to the side end face of the fixed bracket 6 by ball-type nuts and screws.

[0061] Specifically, this automatic screw fastening system adopts a cyclic operation mode of a double-speed chain conveyor 3. The automatic lifting and return plate machine 1 on the left provides a support carrier 4 and a liquid-cooled electronic device 5 for feeding. The liquid-cooled electronic device 5 is placed on the support carrier 4 for limiting and fixing. When the liquid-cooled electronic device 5 is transported to the position of the operator 2 by the double-speed chain conveyor 3, that is, when the target area corresponding to the fixing bracket 6 is reached, the blocking cylinder and the lifting cylinder on the double-speed chain conveyor 3 are activated at once, moving the support carrier 4 and the liquid-cooled electronic device together. 5. Limit and support are lifted. Then, after the operator 2 sees the buzzer sound indicating that the double-speed chain assembly line body 3 has arrived and the information screen is displayed on the task interface of the all-in-one machine, the operator 2 uses the electric screwdriver locking device 708. The operator holds each electric screwdriver control handle 708-2 in the electric screwdriver locking device 708 with both hands. The electric screwdriver control handle 708-2 can directly control the rotation of the electric screwdriver 708-1. The screwdriver bit 708-9 is installed and locked in the bottom sleeve of the electric screwdriver 708-1, thereby locking and unlocking the screw.

[0062] Furthermore, operator 2 holds two electric screwdriver control handles 708-2 with both hands, visually aligns the four screwdriver bits 708-9 with the four screws corresponding to the GPU module 503 in the cold plate 502, and then presses down with both hands to compress the elastic component 708-7. When the position detection component 708-11 senses the raised position signal of the electric screwdriver locking guide sleeve 708-8 relative to the electric screwdriver 708-1, it indicates that the relative position between the electric screwdriver mounting plate 708-3 and the electric screwdriver 708-1 is the target position, and feeds back to the controller 9. If the position detection component 708-11 fails to sense the raised position signal of the electric screwdriver locking guide sleeve 708-8 relative to the electric screwdriver 708-1 within the target time, check whether the position detection component 708-11 is damaged, and replace or reset it if necessary.

[0063] When the position detection component 708-11 senses the raised position signal of the electric screwdriver locking guide sleeve 708-8 relative to the electric screwdriver 708-1, the operator 2 presses the start button 708-2-1 on the electric screwdriver control handle 708-2 with both hands. The electric screwdriver 708-1 will follow the set program, first reversing the four screws corresponding to the GPU module 503 in the cold plate 502 by two turns, and then turning clockwise. The purpose of reversing is to align and lock the four screw bits 708-9 with the four screw patterns corresponding to the GPU module 503. Alternatively, the operator 2 can first press the two reset buttons 708-2 below the electric screwdriver control handle 708-2. -2 performs the first reverse rotation, and then operator 2 presses the two start buttons 708-2-1 above the two electric screwdriver control handles 708-2 with both hands to make the screwdriver bit 708-9 rotate forward, simultaneously tightening the four screws corresponding to the GPU module 503 in the cold plate 502. When the actual tightening torque value reaches the product specification of 0.8 N·m torque value, the four electric screwdrivers 708-1 stop rotating and a green light indicates that the tightening is complete. The green light can be an LED light. At this time, the controller 9 records the actual torque value in the host computer software and uploads it to the MES system in real time for data storage and subsequent data query and traceability, and displays it on the display screen 8 of the all-in-one machine in real time.

[0064] The operation is repeated to tighten the four screws corresponding to the GPU module 503 in the next set of cold plates 502. There are a total of eight sets of GPU module 503 cold plates 502 with the same four screws. When the tightening of the eight sets of screws in the cold plates 502 is completed, the host computer software automatically pops up a window to indicate that the tightening task is complete, and uploads all actual tightening torque values ​​to the MES system in real time for data storage and later data query and traceability. Then, the blocking cylinder and lifting cylinder of the double-speed chain conveyor 3 perform secondary actions to transfer the support carrier 4 and the liquid-cooled electronic equipment 5 to the right automatic lifting return plate machine 1. The liquid-cooled electronic equipment 5, which has completed the assembly task, is lifted off the line and transferred to the next testing stage. At this time, the support carrier 4 is lowered on the right automatic lifting return plate machine 1 to the return layer of the double-speed chain conveyor 3 and transported to the left automatic lifting return plate machine 1. The task is completed, and the cycle begins to move on to the next product for assembly. This forms a precise, efficient, stable, reliable, and highly flexible closed-loop control logic and host computer MES software operation control system.

[0065] In addition to the aforementioned automatic screw fastening device 7, this invention also provides an automatic screw fastening method. Please refer to... Figure 12 The automatic screw fastening method includes the following steps.

[0066] Step S1: When the part to be processed moves to the target area corresponding to the fixed bracket 6, control the part to be processed to stop moving.

[0067] Step S2: Control the electric screwdriver 708-1 to move to the position corresponding to the screw, and continue to press down the electric screwdriver mounting plate 708-3.

[0068] Step S3: When the relative position between the electric screwdriver mounting plate 708-3 and the electric screwdriver locking guide sleeve 708-8 is the target position, a running signal is sent to the electric screwdriver 708-1 so that the electric screwdriver 708-1 enters the operable mode.

[0069] Step S4: A start signal is sent to the electric screwdriver 708-1, and the screwdriver bit 708-9 of the electric screwdriver 708-1 rotates. That is, after receiving the run signal and the start signal, the screwdriver bit 708-9 of the electric screwdriver 708-1 rotates.

[0070] Step S5: When the torque value of the bit 708-9 is greater than or equal to the target torque value, control the electric screwdriver 708-1 to stop operating, and record the number of successful locking operations of the electric screwdriver 708-1.

[0071] Step S6: When the number of successful locks of the electric screwdriver 708-1 is less than the target number, and the electric screwdriver 708-1 is moved out of the target area, a warning signal is issued.

[0072] This automatic screw fastening method automatically controls the workpiece. When the workpiece moves to the target area corresponding to the fixed bracket 6, it automatically stops without manual intervention. Then, the electric screwdriver 708-1 is manually moved to the position corresponding to the screw and continues to press down on the electric screwdriver mounting plate 708-3. When the relative position between the electric screwdriver mounting plate 708-3 and the electric screwdriver fastening guide sleeve 708-8 is the target position, the electric screwdriver 708-1 receives a start signal and enters the standby state. Then, the electric screwdriver 708-1 automatically detects the torque value of the screwdriver bit 708-9 to determine whether the assembly of the corresponding screw is completed. After the assembly of one screw is completed, the torque value of the electric screwdriver 708-1 is recorded. The number of successfully fastened screws is 1. When the number of successfully fastened screws of electric screwdriver 708-1 is less than the target number and electric screwdriver 708-1 is moved out of the target area, a warning signal is issued. That is, when electric screwdriver 708-1 has not completed the assembly of all screws and is moved out of the target area, a warning signal is issued to the operator 2 to fasten the remaining screws. This avoids the problem of some screws on the workpiece being removed from the production line without being fastened due to human calculation errors. The warning signal will not be issued when electric screwdriver 708-1 is moved out of the target area only after the number of successfully fastened screws of electric screwdriver 708-1 is greater than or equal to the target number, thus ensuring the processing reliability of the workpiece and improving the yield rate.

[0073] In some implementations, when the torque value of a single electric screwdriver 708-1 is less than the target torque value and remains so for a preset time, the electric screwdriver 708-1 is determined to be the target electric screwdriver. This indicates that the screw corresponding to the electric screwdriver cannot be properly tightened. After replacing the screw or checking for abnormalities, when the relative position between the electric screwdriver mounting plate 708-3 and the electric screwdriver tightening guide sleeve 708-8 is once again at the target position, the controller 9 sends a running signal to the target electric screwdriver. Other electric screwdrivers 708-1 do not need to send running signals. When the operator 2 sends a start signal to the electric screwdriver 708-1, since only the target electric screwdriver... Simultaneously receiving both the operation and start signals, only the bit 708-9 of the target electric screwdriver begins to rotate. At this time, only screws that have malfunctioned or are abnormal will be tightened, while the other electric screwdrivers 708-1 do not need to be started, saving costs. Of course, when it is necessary to determine whether the relative position between the electric screwdriver mounting plate 708-3 and the electric screwdriver tightening guide sleeve 708-8 is at the target position, it is only necessary to determine whether the relative position between the electric screwdriver mounting plate 708-3 and the electric screwdriver tightening guide sleeve 708-8 of the target electric screwdriver is at the target position. The other electric screwdrivers do not need to be tested, which is convenient for operation.

[0074] Specifically, the host computer is the computer that directly issues control commands in the industrial control system. It is usually a PC or industrial control computer, responsible for monitoring, control, data acquisition and analysis, and working in collaboration with lower-level computers such as PLCs (Programmable Logic Controllers) and microcontrollers. During the software system execution process, operator 2 scans the material number PN (Product Number) and unique identifier QID (Quality Identification) of the GPU module 503 to be assembled using a barcode scanner in the Manufacturing Execution System. After verifying the integrity of the scan for the same type of material, the MES system calls the WebAPI (Web Application Programming Interface) provided by this invention to send a set of parameters including the module material number, module unique identifier, total number of screws, module quantity, standard value of tightening torque, and machine serial number. After receiving the data, the WebAPI interface dynamically allocates the number of screws to be tightened for each electric screwdriver 708-1 according to the module quantity. The host computer software uses ModBus TCP (Modbus Transmission Control) to control the screws. The Modicon Transmission Control Protocol (MTCP) establishes a communication connection with the 708-1 electric screwdriver controller 9, sending the assigned screw quantity and tightening torque parameters to the corresponding 708-1 controller 9, and releasing the 708-1 from its locked state to enter the operable mode. The host computer software monitors the register status of the 708-1 controller 9 in real time: when the 708-1 completes tightening of a single screw, its completion status register is set, and the host computer software reads this register to determine if the tightening action is complete; further, it checks the abnormal status register to determine if tightening was successful, such as insufficient torque or exceeding tolerance; if tightening is normal, the host computer software reads the tightening completion torque register to record the actual torque value, and transmits the current screw quantity and torque data back to the MES system in real time via the MES interface. This process is repeated until the set total number of screws is reached, at which point the host computer software sends a locking command to the 708-1 controller 9, putting the 708-1 into an inoperable state to prevent accidental triggering. The MES system performs a final verification of the number of screws that have been tightened. If the actual number of screws tightened is inconsistent with the preset value, an alarm message "Previous process not completed" is generated when a process pass request is received, blocking the subsequent operation process. Only when the two are consistent will the MES system determine that the process is qualified and allow it to enter the next assembly stage.

[0075] In one specific embodiment, such as Figure 13As shown, taking four electric screwdrivers 708-1 as an example, namely electric screwdrivers 708-11, 708-12, 708-13, and 708-14, all four electric screwdrivers 708-1 are synchronously controlled by electric screwdriver control handles 708-2. Each electric screwdriver 708-1 corresponds to an electric screwdriver 708-1 controller 9. Then, 220V AC power is supplied to the electric screwdriver 708-1 controller 9 through the electric screwdriver 708-1 power adapter AC power. The control of each electric screwdriver 708-1 can be connected through five network cable communication port switches. 220V AC power is supplied to each network cable communication port switch through the switch power adapter DC power. The network cable communication port switches are connected to the host computer MES system to realize functions such as data transmission, storage traceability, network communication, remote control, and program update iteration. The host computer MES system is connected to the display screen 8, and real-time data is displayed on the display screen 8 of the all-in-one machine.

[0076] In one specific embodiment, after the part to be processed moves to the target area, the barcode scanner scans the material number and unique identifier of the part. The MES system verifies the integrity of the material. If the verification fails, an alarm is triggered and the process is terminated. If the verification passes, parameters are transmitted to the host computer via the WebAPI interface. The host computer calculates the number of screws allocated to the 708-1 electric screwdriver. ModBus... The TCP sends torque parameters, releases the 708-1 electric screwdriver from its locked state, monitors the 708-1 register status, and determines whether the 708-1 register has completed status setting. If the 708-1 register has completed status setting, an abnormal state is detected. If an abnormality occurs, an audible and visual alarm is triggered. If the state is normal, the torque value is recorded and sent back to the MES system. The system then checks whether the cumulative number of screws tightened has reached the set total. If the cumulative number of screws tightened has reached the set total, the 708-1 electric screwdriver is locked and the MES system is notified. The MES system verifies the total number for consistency. If the total number is consistent, the next process is allowed. If the total number is inconsistent, a warning signal is issued. If the cumulative number of screws tightened has not reached the set total, the system returns to monitoring the 708-1 electric screwdriver register status.

[0077] The automatic screw fastening device 7, automatic screw fastening system and method provided by the present invention have the following beneficial effects.

[0078] 1. A feasible solution for batch synchronously locking four screws on the GPU module 503 and cold plate 502 of liquid-cooled electronic device 5 fills a gap in the current field of electronic devices. It supports multiple task combination modes, can be used for various assembly needs, has high flexibility, improves production efficiency, reduces labor input costs, improves product yield, and reduces the risk of damaged parts.

[0079] 2. It has advantages such as safe and stable operation, high degree of semi-automation with human-machine assistance, improved operating efficiency, high cleanliness, and low noise.

[0080] 3. The controller 9 has a built-in servo driver that can provide precise control such as torque and angle monitoring and deceleration tightening, and has an advanced data storage and control interaction communication interface.

[0081] 4. It features multiple safety operation options including physical buttons, indicator lights, and a buzzer, as well as foolproof and monitoring functions, further enhancing the reliability of controller 9.

[0082] 5. The use of a balancing lever arm can improve the product assembly quality and torque accuracy, prevent the screwdriver from twisting and slipping in the operator's hands, maintain the screwdriver's good perpendicularity for assembly and locking, and improve the operation accuracy.

[0083] 6. The balancing arm used makes operation more labor-saving and can counteract the reaction force and its own weight when the electric screwdriver 708-1 rotates and locks the screw in the cold plate 502, reducing tendon fatigue damage caused by repetitive movements for the operator.

[0084] The automatic screw fastening device, automatic screw fastening system, and method provided by this invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make several improvements and modifications to this invention without departing from the principles of this invention, and these improvements and modifications also fall within the protection scope of this invention.

Claims

1. An automatic screw fastening device, characterized in that, Includes an electric screwdriver fastening device (708), said electric screwdriver fastening device (708) comprising: Electric screwdriver (708-1), used to tighten screws on parts to be processed; The electric screwdriver mounting plate (708-3) is used to move the electric screwdriver (708-1) toward or away from the screw; An electric screwdriver locking guide sleeve (708-8) is fixedly connected to the electric screwdriver (708-1). The electric screwdriver locking guide sleeve (708-8) is movably disposed on the electric screwdriver mounting plate (708-3). The axial direction of the electric screwdriver locking guide sleeve (708-8) is perpendicular to the surface of the electric screwdriver mounting plate (708-3), and the electric screwdriver locking guide sleeve (708-8) is provided with a stroke limiting hole (708-8-1) in the axial direction. A limiting connector (708-6) is disposed on the electric screwdriver mounting plate (708-3), and one end of the limiting connector (708-6) extends into the travel limiting hole (708-8-1). The limiting connector (708-6) can slide relative to the travel limiting hole (708-8-1) to limit the relative movement stroke of the electric screwdriver locking guide sleeve (708-8) and the electric screwdriver mounting plate (708-3). The elastic component (708-7) abuts against the electric screwdriver locking guide sleeve (708-8) at one end and against the electric screwdriver mounting plate (708-3) at the other end. When the electric screwdriver mounting plate (708-3) moves the electric screwdriver (708-1) to abut against the screw, the electric screwdriver mounting plate (708-3) can continue to move toward the screw to compress the elastic component (708-7) until the limiting connector (708-6) engages with the bottom of the travel limiting hole (708-8-1).

2. The automatic screw fastening device according to claim 1, characterized in that, The electric screwdriver locking device (708) further includes a limiting ring (708-4), which is disposed on the upper part of the electric screwdriver locking guide sleeve (708-8). The elastic member (708-7) is disposed on the lower part of the electric screwdriver locking guide sleeve (708-8). The bottom of the electric screwdriver locking guide sleeve (708-8) is provided with a limiting protrusion for limiting the elastic member (708-7). The electric screwdriver mounting plate (708-3) is located between the limiting ring (708-4) and the elastic member (708-7).

3. The automatic screw fastening device according to claim 1, characterized in that, It also includes a beam assembly, a fixing device, and a sliding device. The screw is located on the part to be processed. The beam assembly is located between the electric screwdriver mounting plate (708-3) and the sliding device. The beam assembly is disposed on the sliding device, and the sliding device is disposed on the fixing device, so that the electric screwdriver mounting plate (708-3) can slide vertically and translate horizontally relative to the fixing device.

4. The automatic screw fastening device according to claim 3, characterized in that, The fixing device includes a device fixing support assembly (701), a balancer guide shaft support assembly (702), and a device top fixing seat (705). The device fixing support assembly (701) and the device top fixing seat (705) are respectively used to be installed on the top and bottom of the fixing bracket (6) of the screw automatic fastening system. The balancer guide shaft support assembly (702) is located between the device fixing support assembly (701) and the device top fixing seat (705), and the sliding device is slidably installed on the balancer guide shaft support assembly (702).

5. The automatic screw fastening device according to claim 4, characterized in that, The sliding device includes a bearing housing sleeve (703) and a balancer tension spring (704). The bearing housing sleeve (703) is slidably sleeved on the balancer guide shaft support assembly (702). The free end of the balancer tension spring (704) is connected to the bearing housing sleeve (703). The balancer tension spring (704) is positioned adjustablely on the balancer guide shaft support assembly (702) to adjust the downward pressing force of the bearing housing sleeve (703).

6. The automatic screw fastening device according to any one of claims 1 to 5, characterized in that, Also includes: A position detection component (708-11) is disposed on the electric screwdriver mounting plate (708-3) and / or the electric screwdriver locking guide sleeve (708-8). The position detection component (708-11) is used to obtain the relative position between the electric screwdriver mounting plate (708-3) and the electric screwdriver locking guide sleeve (708-8). The controller (9) is connected to the position detection component (708-11) and the electric screwdriver (708-1). The controller (9) is used to send a running signal to the electric screwdriver (708-1) when the relative position between the electric screwdriver mounting plate (708-3) and the electric screwdriver locking guide sleeve (708-8) is the target position, so that the electric screwdriver (708-1) enters the operable mode.

7. The automatic screw fastening device according to claim 6, characterized in that, There are multiple electric screwdrivers (708-1), and each electric screwdriver (708-1) is mounted on the same electric screwdriver mounting plate (708-3); the position detection component (708-11) is a distance sensing sensor, and the position detection component (708-11) is mounted on the electric screwdriver mounting plate (708-3), and the number of distance sensing sensors is the same as the number of electric screwdrivers (708-1), and they correspond one-to-one.

8. The automatic screw fastening device according to claim 6, characterized in that, The electric screwdriver locking device (708) further includes an electric screwdriver control handle (708-2), which is mounted on the electric screwdriver mounting plate (708-3). There are at least two electric screwdriver control handles (708-2), which are located on the left and right sides of the electric screwdriver mounting plate (708-3), respectively. Each electric screwdriver control handle (708-2) is provided with a button, which is connected to the controller (9). The controller (9) is used to send a start signal to the electric screwdriver (708-1) when all the buttons on each electric screwdriver control handle (708-2) are pressed. After receiving the running signal and the start signal, the electric screwdriver (708-1) controls the screwdriver bit (708-9) to rotate.

9. An automatic screw fastening system, characterized in that, The device includes an automatic screw fastening device (7) as described in any one of claims 1 to 8; it also includes a fixed bracket (6), an automatic lifting and return plate machine (1), a double-speed chain conveyor (3), and a support carrier (4). The fixed bracket (6) is disposed on the side of the double-speed chain conveyor (3), the automatic screw fastening device (7) is disposed on the fixed bracket (6), the automatic lifting and return plate machine (1) is used to place the part to be processed on the support carrier (4) or remove it from the support carrier (4), the support carrier (4) is disposed on the double-speed chain conveyor (3), and the support carrier (4) is used to carry the part to be processed; the double-speed chain conveyor (3) is also provided with a blocking component and a lifting component. When the support carrier (4) moves to the target area corresponding to the fixed bracket (6), the blocking component is used to block the support carrier (4), and the lifting component is used to lift the part to be processed.

10. A method for automatically fastening screws, employing the automatic screw fastening device (7) as described in any one of claims 1 to 8, characterized in that, Includes the following steps: When the part to be processed moves to the target area, the electric screwdriver (708-1) is controlled to move to the position corresponding to the screw of the part to be processed, and the electric screwdriver mounting plate (708-3) is pressed down. When the relative position between the electric screwdriver mounting plate (708-3) and the electric screwdriver locking guide sleeve (708-8) is the target position, a running signal is sent to the electric screwdriver (708-1) so that the electric screwdriver (708-1) enters the operable mode; A start signal is sent to the electric screwdriver (708-1), and the screwdriver bit (708-9) of the electric screwdriver (708-1) rotates; When the torque value of the bit (708-9) is greater than or equal to the target torque value, the electric screwdriver (708-1) is controlled to stop operating, and the number of successful locking operations of the electric screwdriver (708-1) is recorded. When the number of successful locking operations of the electric screwdriver (708-1) is less than the target number, and the electric screwdriver (708-1) is moved out of the target area, a warning signal is issued.

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