A welding device for the production of industrial control computer chassis

Abstract

This invention discloses a welding device for the production of industrial control computer enclosures, belonging to the field of industrial control computer enclosure manufacturing technology. The device includes a welding base, a robotic arm track, a laser welding robotic arm, and an industrial control computer enclosure welding assembly. The welding assembly includes a side support plate, an enclosure support plate, a clamping cylinder for external clamping, and a clamping plate. Its core feature is a central plate that can be raised and lowered and adhered to the industrial control computer enclosure cover. Around the central plate are internal adjusting blocks driven by adjusting cylinders, which can clamp the enclosure shell from the inside, forming a coordinated internal and external clamping, effectively preventing deformation of the thin-walled enclosure shell. Utilizing the cooperation of horizontal contact plates and contacts, the horizontality of the industrial control computer enclosure cover is monitored in real time, and the fine-tuning cylinder is automatically controlled to press down or trigger the electromagnetic block to magnetically attract, dynamically correcting any bulges or depressions in the enclosure cover. This invention achieves suppression of workpiece deformation during welding, precise dynamic adjustment of the industrial control computer enclosure cover's horizontality, and active cooling of the weld, improving welding quality and precision.

Description

Technical Field

[0001] This invention relates to the field of industrial control computer chassis manufacturing, specifically a welding device for industrial control computer chassis manufacturing. Background Technology

[0002] In the field of industrial control, industrial control chassis serve as key structural components that carry and protect precision electronic components, and their manufacturing quality directly affects the stable operation of the internal equipment. These chassis are typically constructed by welding a shell formed from bent or stamped thin metal sheets, along with a cover that matches the shell's opening. To ensure the chassis's airtightness, electromagnetic shielding performance, and to provide a flat reference surface for the internal mounting of rails, motherboards, etc., extremely high requirements are placed on the geometric accuracy, deformation, and weld quality of the welded chassis.

[0003] Currently, the welding processes commonly used in the production of industrial control computer enclosure covers and shells fall into two main categories. The first is a two-step welding method: first, the cover and shell are temporarily and discontinuously fixed using simple methods such as spot welding; then, precision welding techniques such as laser welding are used for final full welding along the joint. The second is a direct welding method: after placing the cover on the shell opening, external clamps are used to clamp and fix the shell from all sides, followed immediately by laser welding. However, both of these existing methods have significant technical drawbacks in practical applications, severely affecting welding quality and product yield.

[0004] First, the enclosure and cover of the industrial control computer chassis are both thin-walled components with limited structural rigidity. When using direct welding or spot welding for initial fixation, a large clamping force needs to be applied from the outside of the enclosure to resist deformation caused by welding thermal stress and ensure positioning. This unidirectional, concentrated, and strong constraint on the outside can easily cause inward plastic deformation or elastic distortion of the thin-walled enclosure sidewalls. The deformation of the enclosure itself will be directly transmitted to the cover placed on it, causing the cover to tilt, warp, or partially collapse. This initial deformation and non-parallelism that exists before welding will make the weld gap between the cover and the enclosure uneven in the circumferential direction. During laser welding, the uneven gap will lead to asymmetrical laser energy input distribution and inconsistent penetration depth, resulting in a series of quality problems such as weak welds, burn-through, rough weld appearance, and poor sealing. More seriously, the overall geometric accuracy of the welded enclosure will be out of tolerance, and the reference surface used for installing components inside will no longer be flat, which may cause difficulties in subsequent assembly or vibration during equipment operation.

[0005] Secondly, the welding process itself contains key elements that can lead to quality deterioration. During welding, the high energy of the laser beam rapidly melts the base metal at the joint, forming a molten pool. In the extremely short period before the molten metal has fully solidified and cooled, it is in a liquid-like state with very low strength. At this time, any slight displacement or stress change in the workpiece due to fixture stress release, uneven thermal expansion, or minor external disturbances can easily cause the undone weld metal to flow or shift. This "weld offset" phenomenon directly causes the final welding path to deviate from the preset joint position, and similarly leads to uncontrollable skewness of the lid relative to the shell. This dynamically generated skewness during welding is also a significant cause of product scrap.

[0006] Existing solutions mostly focus on improving the rigidity of the fixture or optimizing welding path parameters, but they often fail to fundamentally solve the deformation problem of thin-walled parts under strong clamping forces. Furthermore, they lack the ability to monitor and compensate for the actual levelness of the lid in real time during welding. In addition, rapid cooling of the welding area is crucial for reducing thermal deformation and stabilizing the weld morphology, but conventional welding equipment typically relies on natural cooling or simple air blowing, which is inefficient and produces chaotic airflow, failing to create a uniform and controllable cooling environment around critical weld seams.

[0007] Therefore, how to design a welding device that can effectively prevent the thin-walled industrial control computer chassis from deforming due to clamping during welding, monitor and dynamically adjust the levelness of the chassis cover in real time to cope with the effects of initial errors before welding and thermal deformation during welding, and achieve directional and efficient cooling of the weld area, thereby comprehensively improving the welding accuracy and quality of the industrial control computer chassis, has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the present invention aims to overcome these deficiencies and provide a welding device for the production of industrial control chassis. This device aims to solve problems such as deformation caused by clamping force, difficulty in maintaining the levelness of the chassis cover, and uneven weld cooling during the welding of thin-walled chassis. Through innovative structures integrating internal and external coordinated clamping, dynamic monitoring and fine-tuning of levelness, and rotating airflow cooling, high precision, high stability, and high quality are achieved in the welding process.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a welding device for the production of industrial control computer chassis, comprising a welding base, a robot rail and a laser welding robot, the core of which is an industrial control computer chassis welding component set on one side of the welding base, which ensures welding quality through a multi-layer collaborative control mechanism.

[0010] The device supports the workpiece via a chassis support plate and is precisely raised and lowered to the working position by a chassis lifting cylinder. The clamping plate is driven by longitudinal and transverse clamping cylinders on the outside to initially secure the industrial control computer chassis from the outside.

[0011] To address the issue of deformation caused by external single-point clamping, this invention introduces internal dynamic support. A central plate, controlled by a central plate lifting cylinder and attracted by a magnetic head, can descend to the surface of the lid. Around the central plate, longitudinal and transverse internal adjustment components are arranged. Each internal adjustment component is driven by an adjusting cylinder to produce an internal adjustment block. When the external clamping plate presses against the lid from the outside, the internal adjustment block, driven by the adjusting cylinder, presses against the corresponding inner wall of the lid from the inside. Thus, the sidewall of the lid is balanced by the inward pressure from the external clamping plate and the outward thrust from the internal adjustment block, effectively suppressing bending deformation of the thin-walled lid during clamping and providing a stable and flat base for the lid.

[0012] To achieve closed-loop control of the lid's levelness, each internal adjustment block integrates a precision sensing and actuator mechanism. The internal adjustment block has multiple fine-tuning cylinders, whose outputs are connected to an electromagnetic block via spring rods. The electromagnetic block contacts the lid surface under the action of the springs. The leveling contact at the upper end of the spring rod, along with the corresponding fine-tuning cylinder drive contacts and the electromagnetic block energizing contacts, together constitute the levelness sensing circuit.

[0013] When the lid is completely level, all electromagnetic blocks are pressed down at the same amount, all horizontal contact pieces are at the same height, and the external "normal level" indicator circuit is activated.

[0014] If a certain part of the box cover surface protrudes too high, the electromagnetic block at that point will be lifted, the horizontal contact piece will move upward to contact the fine-tuning cylinder drive contact, and then trigger the corresponding fine-tuning cylinder to apply downward pressure to flatten the protruding part.

[0015] If the surface of the box cover is too low, the electromagnetic block at that location will move down, and the horizontal contact piece will move down to contact the energized contact of the electromagnetic block, triggering the electromagnetic block to generate a strong magnetic force, which will lift up the recessed part of the box cover.

[0016] This system can continuously monitor and correct the levelness of the lid before and during welding to ensure that it is always in an ideal state.

[0017] To accelerate weld cooling and reduce thermal deformation, each inner adjustment block has a through-hole with fans rotating in opposite directions at both ends. These fans on multiple inner adjustment blocks work together to create a continuous, rotating airflow field in the weld area around the center plate and the cover. This directional airflow efficiently removes welding heat, accelerates molten pool solidification, and disperses welding fumes.

[0018] When the laser welding robot needs to weld a position that is blocked by the inner adjustment block, the control system can instruct the corresponding adjustment cylinder to temporarily retract the inner adjustment block to make room for welding. After welding is completed, the cylinder will be reset to ensure welding accessibility.

[0019] Compared with the prior art, the present invention provides a welding device for the production of industrial control computer chassis, which has the following beneficial effects:

[0020] 1. This welding device for the production of industrial control computer enclosures balances the clamping force acting on the thin-walled enclosure shell by combining external clamping and internal support. This fundamentally avoids the enclosure shell dent and initial tilting of the enclosure cover caused by unidirectional high-pressure clamping, thus providing a prerequisite for high-quality welding.

[0021] 2. This welding device for industrial control computer chassis production achieves real-time, online, dynamic closed-loop control of the chassis cover's levelness through a levelness monitoring and electromagnetic-mechanical combined fine-tuning system. Whether it's installation errors or levelness changes caused by welding thermal deformation, immediate automatic compensation is provided, ensuring uniform weld gaps and post-weld chassis geometric accuracy.

[0022] 3. This welding device for the production of industrial control computer enclosures uses a rotating airflow cooling system to efficiently and directionally cool the weld area, shortening the molten pool existence time, reducing the high-temperature deformation window, helping to obtain a more uniform and aesthetically pleasing weld structure, and reducing welding stress. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the isometric three-dimensional structure of the present invention;

[0024] Figure 2 This is a rear-view three-dimensional structural diagram of the present invention;

[0025] Figure 3 This is a top-view three-dimensional structural diagram of the welding assembly of the industrial control computer chassis of the present invention;

[0026] Figure 4 This is a schematic diagram of the equiaxial three-dimensional structure of the welding assembly for the industrial control computer chassis of the present invention;

[0027] Figure 5 This is a schematic diagram of the central plate mounting structure of the present invention;

[0028] Figure 6 This is a three-dimensional structural diagram of the longitudinal inward adjustment component of the present invention;

[0029] Figure 7 This is a schematic diagram of the horizontal contact piece of the present invention.

[0030] In the diagram: 1. Welding base; 2. Robotic arm track; 3. Laser welding robotic arm; 4. Industrial control chassis welding assembly; 5. Side support plate; 6. Chassis lifting cylinder; 7. Vertical guide rod; 8. Fixing plate; 9. Chassis support plate; 10. Center plate lifting cylinder; 11. Magnetic suction head; 12. Mounting bracket; 13. Industrial control chassis cover; 14. Side mounting plate; 15. Industrial control chassis shell; 16. Longitudinal clamping cylinder; 17. Lateral clamping cylinder; 18. Center plate; 19. Longitudinal internal adjustment assembly; 20. Lateral internal adjustment assembly; 21. Adjusting cylinder; 22. Fine-tuning cylinder; 23. Through air hole; 24. Internal adjustment block; 25. Electromagnetic block; 26. Spring rod; 27. Fine-tuning cylinder drive contact; 28. Horizontal contact piece; 29. ​​Electromagnetic block energizing contact; 30. Clamping plate. Detailed Implementation

[0031] This invention relates to a welding apparatus for the production of industrial control computer enclosures, specifically an automated welding device capable of effectively preventing deformation of thin-walled industrial control computer enclosures and their covers during the welding process, monitoring and adjusting the levelness of the cover in real time, and accelerating weld cooling to improve welding quality and efficiency. The invention will be further described in detail below with reference to the accompanying drawings.

[0032] Example 1:

[0033] like Figure 1-7 As shown, the present invention provides a welding device for the production of industrial control computer enclosures. Its main structure includes a welding base 1 as a basic support platform. On the upper surface of the welding base 1, a robot arm track 2 is installed along a specific direction. The robot arm track 2 is preferably a high-precision linear guide rail. A laser welding robot arm 3 is slidably installed on the robot arm track 2. The laser welding robot arm 3 is the core welding execution unit of this device. It includes a laser generator, a focusing lens group, a wire feeding mechanism, a protective gas nozzle, and a multi-degree-of-freedom robotic arm. It is an existing mature technology structure, which will not be described in detail in this invention. The laser welding robot arm 3 can move linearly over a wide range along the robot arm track 2. At the same time, its own robotic arm can achieve multi-angle posture adjustment, thereby ensuring that the laser beam can accurately irradiate the weld seam to be welded between the industrial control computer enclosure shell 15 and the industrial control computer enclosure cover 13.

[0034] On one side of the welding base 1, an industrial control computer chassis welding assembly 4 is fixedly installed. The industrial control computer chassis welding assembly 4 includes two sets of symmetrically arranged side support plates 5. The side support plates 5 are vertically fixed to one side of the upper surface of the welding base 1. The two can be connected by bolts or directly welded to ensure the stability of the support. The two sets of side support plates 5 are connected and fixed at the upper and lower ends by fixing plates 8 respectively. Specifically, a fixing plate 8 is horizontally connected to the upper and lower ends of each set of side support plates 5. The upper fixing plate 8 connects to the upper end of the two sets of side support plates 5, and the lower fixing plate 8 connects to the lower end of the two sets of side support plates 5, thus forming a complete set together with the side support plates 5. The robust rectangular frame structure has at least two vertical guide rods 7 vertically connected between the upper and lower fixed plates 8. On the vertical guide rods 7, a chassis support plate 9 that can slide up and down is fitted. The chassis support plate 9 is used to support the industrial control computer chassis shell 15 to be welded. Its shape and size match the bottom contour of the industrial control computer chassis shell 15, providing stable support. On the lower fixed plate 8, a chassis lifting cylinder 6 is installed. The output end of the chassis lifting cylinder 6 is fixedly connected to the bottom center position of the chassis support plate 9. When the chassis lifting cylinder 6 is activated, it can drive the chassis support plate 9 to rise or fall smoothly along the vertical guide rods 7, thereby realizing the lifting and lowering of the industrial control computer chassis shell 15.

[0035] An industrial control computer chassis shell 15 to be welded is placed on the chassis tray 9. The industrial control computer chassis shell 15 is usually a rectangular box structure, made of thin aluminum alloy or stainless steel plate bent and welded. The industrial control computer chassis cover 13 covers the upper opening of the industrial control computer chassis shell 15. The two need to be welded along the seams around the perimeter to form a closed box. Between the upper ends of the two sets of side support plates 5, directly above the chassis tray 9, a side mounting plate 14 is horizontally fixed. The side mounting plate 14 is parallel to the fixed plate 8. At least three sets of longitudinal clamping cylinders 16 are installed on the side mounting plate 14. These longitudinal clamping cylinders 16 are arranged along a direction parallel to the longer side of the industrial control computer chassis shell 15. At the same time, on the two sets of side support plates 5, a side mounting plate 14 is horizontally fixed to the upper end of the chassis tray 9. At the upper end of plate 5, a transverse clamping cylinder 17 is also installed. The transverse clamping cylinder 17 is usually located on the side or end of the side mounting plate 14, and its direction of action is parallel to the shorter side of the industrial control computer housing 15. The output ends of the longitudinal clamping cylinder 16 and the transverse clamping cylinder 17 are fixedly connected to clamping plates 30. The bottom surface of the clamping plate 30 can be covered with flexible materials such as rubber or engineering plastics to protect the outer surface of the industrial control computer housing 15 during clamping. When the longitudinal clamping cylinder 16 and the transverse clamping cylinder 17 act simultaneously or sequentially, they drive their respective clamping plates 30 to move inward from both longitudinal and transverse directions, thereby clamping the industrial control computer housing 15 from the outside to achieve its initial fixation and prevent it from moving in subsequent operations.

[0036] However, simply clamping and fixing the thin-walled industrial control computer chassis 15 from the outside has significant drawbacks. Since the clamping force acts directly on the sidewall of the chassis 15, and the chassis 15 itself is thin and has limited rigidity, this unidirectional compression easily causes the sidewall of the chassis 15 to undergo inward elastic or plastic deformation. This deformation is further transmitted to the chassis cover 13 placed on top, causing the chassis cover 13 to tilt or twist. During the welding process, any movement of the chassis cover 13... If the weld is not level or is skewed, it will result in uneven weld gaps and asymmetrical heat distribution during laser welding. Ultimately, this will reduce the sealing performance of the welded enclosure, cause poor appearance, and make the reference surfaces for internal components such as guide rails or motherboards uneven, which will seriously affect product quality. In addition, during the welding of the industrial control computer enclosure cover 13, the metal at the welding position melts at high temperature to form a molten pool. If it is subjected to internal stress or external interference before the molten pool is completely solidified and cooled, it is very easy to cause the weld to shift or deform, exacerbating the skewness of the industrial control computer enclosure cover 13.

[0037] To address the aforementioned issues, this invention also includes a mounting frame 12 fixedly connected between the upper ends of the two sets of side support plates 5, located in the middle of the side mounting plate 14. The mounting frame 12 is typically a gantry frame or a structure composed of several support columns. A center plate lifting cylinder 10 is mounted on the upper end of the mounting frame 12, with the output end of the center plate lifting cylinder 10 pointing downwards and fixedly connected to a magnetic suction head 11. A center plate 18 is adsorbed below the magnetic suction head 11. The center plate 18 is made of magnetically conductive material, and its planar dimensions are slightly smaller than those of an industrial control computer. In the initial state or during loading, the center plate 18 of the box cover 13 is attracted by the magnetic head 11 and suspended directly above the industrial control computer box cover 13. The center plate 18 is placed in the central area of ​​the industrial control computer box cover 13. The longitudinal internal adjustment components 19 are symmetrically installed on the front and rear sides of the center plate 18, and the transverse internal adjustment components 20 are symmetrically installed on the left and right sides of the center plate 18. The longitudinal internal adjustment components 19 and the transverse internal adjustment components 20 have the same structure, but their installation directions are perpendicular to each other, so as to act on different inner surfaces of the industrial control computer box 15 respectively.

[0038] The core structure of each internal adjustment component includes an adjustment cylinder 21. The cylinder body of the adjustment cylinder 21 is fixedly installed inside the center plate 18 or in a pre-set mounting cavity on the side. The output end of the adjustment cylinder 21, i.e. the end of the piston rod, is fixedly connected to an internal adjustment block 24. Its outer end face is designed as an arc surface or a plane that matches the shape of the inner wall of the industrial control computer housing 15. The adjustment cylinder 21 can drive the internal adjustment block 24 to reciprocate linearly along a direction perpendicular to the side of the center plate 18. When the adjustment cylinder 21 extends, it pushes the internal adjustment block 24 to move outward and press against the inner wall of the industrial control computer housing 15. When the adjustment cylinder 21 retracts, it drives the internal adjustment block 24 to move inward and disengage from the inner wall of the industrial control computer housing 15.

[0039] Inside the inner regulating block 24, a through vent 23 is vertically oriented. Filters are installed at both ends of the through vent 23 to prevent dust or welding spatter from entering. Inside the through vent 23, a fan is installed at each end. The two fans rotate in opposite directions. When they work simultaneously, one fan draws air into the vent, while the other blows air out of the vent, thus creating a directional airflow inside and near the port of the through vent 23. This design combination on multiple inner regulating blocks 24 can create a circulating, rotating airflow field around the center plate 18.

[0040] Three sets of fine-tuning cylinders 22 are installed at the upper end of the inner adjusting block 24. These three sets of fine-tuning cylinders 22 are arranged at equal intervals along the length of the inner adjusting block 24. The cylinder body of the fine-tuning cylinder 22 is fixed inside the inner adjusting block 24. The output end of the fine-tuning cylinder 22 faces downward and is fixedly connected to a spring rod 26. The lower end of the spring rod 26 passes through the bottom of the inner adjusting block 24 and extends out. An electromagnetic block 25 is fixedly connected to its end. A compression spring is fitted on the outside of the spring rod 26. The upper end of the spring rests on the step inside the inner adjusting block 24, and the lower end rests on the electromagnetic block 25 or the flange connected to the electromagnetic block 25. In its natural state, the elastic force of the spring causes the electromagnetic block 25 to extend downward, so that its bottom surface is slightly lower than the bottom surface of the inner adjusting block 24. The electromagnetic block 25 is made of magnetic material and has a coil wound inside. When the coil is energized, the electromagnetic block 25 becomes an electromagnet and generates magnetic attraction. When the coil is de-energized, it has no magnetism.

[0041] The specific working process and implementation method of the device of the present invention are as follows:

[0042] First, the workpiece is loaded and initially fixed. The operator or automated feeding mechanism places the industrial control computer housing 15 to be welded on the housing support plate 9, ensuring that its position is roughly centered. Then, the housing lifting cylinder 6 is activated. The piston rod of the housing lifting cylinder 6 extends and pushes the housing support plate 9 to move smoothly upward along the vertical guide rod 7. The housing support plate 9 drives the industrial control computer housing 15 on it to rise together until the upper opening of the industrial control computer housing 15 reaches a preset height position that is convenient for installing the industrial control computer cover 13 and subsequent internal operations. Then, the industrial control computer cover 13 is placed at the upper opening of the industrial control computer housing 15. The industrial control computer cover 13 falls on the industrial control computer housing 15 by its own weight and initial alignment, but at this time, precise positioning and fixing have not yet been performed.

[0043] Next, the longitudinal clamping cylinder 16 and the transverse clamping cylinder 17 are activated. The piston rod of the longitudinal clamping cylinder 16 extends, driving the clamping plate 30 connected to it to move inward from the longitudinal sides of the industrial control computer housing 15 and clamp the longitudinal outer side of the industrial control computer housing 15. At the same time, the piston rod of the transverse clamping cylinder 17 extends, driving the clamping plate 30 connected to it to move inward from the transverse sides of the industrial control computer housing 15 and clamp the transverse outer side of the industrial control computer housing 15. Through the synergistic action of the clamping plates 30 in multiple directions, the industrial control computer housing 15 is initially clamped and fixed in the current position from the outside, preventing it from being displaced as a whole due to force in subsequent steps.

[0044] However, as mentioned above, such external compression carries the risk of deformation of the thin-walled industrial control computer housing 15. To address this, the present invention activates an internal anti-deformation adjustment mechanism. The center plate lifting cylinder 10 actuates, and its piston rod extends downward, driving the magnetic head 11 and the center plate 18, which is magnetically attracted, to move downward together. During the descent, the lower surface of the center plate 18 eventually contacts and is placed smoothly in the center area of ​​the upper surface of the industrial control computer housing cover 13. At this time, the weight of the center plate 18 and the downward pressure help stabilize the industrial control computer housing cover 13. Subsequently, the center plate lifting cylinder 10 stops actuating and may retract slightly to relieve the downward pressure, but the magnetic head 11 remains energized and still attracts the center plate 18.

[0045] Next, the adjusting cylinders 21 in all longitudinal internal adjustment components 19 and transverse internal adjustment components 20 are activated simultaneously. For the longitudinal internal adjustment component 19, its adjusting cylinder 21 drives the internal adjustment block 24 to move outward longitudinally. The internal adjustment block 24 passes through the opening on the side of the center plate 18, and its outer end face finally presses tightly against the longitudinal inner side wall of the industrial control computer housing 15. Similarly, for the transverse internal adjustment component 20, its adjusting cylinder 21 drives the internal adjustment block 24 to move outward transversely, so that its outer end face presses tightly against the transverse inner side wall of the industrial control computer housing 15. Thus, each side wall of the industrial control computer housing 15 is simultaneously subjected to pressure from the internal adjustment cylinder 21. The inward pressure from the outer clamping plate 30 and the outward thrust from the inner adjusting block 24, these two opposing forces of controlled magnitude, form a balanced state within the side wall material of the industrial control computer chassis 15, similar to clamping a thin plate between two sides. This internal and external clamping method effectively suppresses the tendency of the side wall of the industrial control computer chassis 15 to bend and deform due to unidirectional pressure, allowing it to maintain its original flat shape to the maximum extent while being tightened. Since the deformation of the industrial control computer chassis 15 itself is controllable, the risk of the industrial control computer cover 13 placed on it being tilted due to the deformation of the base is also greatly reduced.

[0046] After the internal anti-deformation adjustment is completed, the center plate lifting cylinder 10 is activated again, driving the magnetic head 11 to move upward, preparing to separate from the center plate 18. At this time, since the inner adjusting block 24 is pressing against the inner wall of the industrial control computer housing 15, there is an inward static friction force between the inner wall of the industrial control computer housing 15 and the inner adjusting block 24. This friction force is transmitted to the center plate 18 through the inner adjusting block 24 and the adjusting cylinder 21. When the magnitude of this friction force exceeds the electromagnetic attraction force of the magnetic head 11 on the center plate 18, the center plate 18 will no longer rise with the magnetic head 11, but will remain in place, that is, stay on the upper surface of the industrial control computer housing cover 13. The magnetic head 11 rises and resets smoothly, making room for the levelness monitoring and fine-tuning system on the center plate 18 and releasing the constraint.

[0047] At this time, the industrial control computer chassis 15 has been clamped and fixed from the inside and outside, and the industrial control computer chassis cover 13 has also been pressed down by the upper center plate 18. However, the level of the industrial control computer chassis cover 13 itself has not been accurately calibrated. Under the action of high welding temperature, any slight unevenness may be magnified. Therefore, the device of the present invention integrates a precise real-time level monitoring and automatic fine adjustment system. The working principle of the system relies on three sets of fine adjustment cylinders 22, spring rods 26, electromagnetic blocks 25 and a set of precise contact sensing circuits installed on the inner adjustment block 24.

[0048] After the center plate 18 is placed on the industrial control computer box cover 13 and the inner adjustment block 24 is pressed against the inner wall of the industrial control computer box shell 15, the bottom of the three sets of electromagnetic blocks 25 at the bottom of each inner adjustment block 24 will extend downward and contact the upper surface of the industrial control computer box cover 13 under the elastic force of the spring inside the spring rod 26. Since the elastic force of the spring is compressible, the electromagnetic block 25 will adaptively press against the surface of the industrial control computer box cover 13 and move up and down slightly with the undulation of the surface of the industrial control computer box cover 13. The up and down movement of the spring rod 26 will drive the horizontal contact piece 28 fixed at its upper end to move up and down synchronously.

[0049] Ideally, if the upper surface of the industrial control computer chassis cover 13 is perfectly horizontal, then all the electromagnetic blocks 25 pressing on it will move downwards by the same amount. This means that all the spring rods 26 are compressed to the same degree, and all the horizontal contacts 28 will remain on the same preset height reference surface. These horizontal contacts 28 are all connected to an external detection circuit, which can be designed as a series loop. The circuit will only be turned on when all the horizontal contacts 28 are at the preset "flush" height position and are in good contact with a fixed common reference contact. The circuit will illuminate a "normal level" indicator light or send a "level" signal to the control system.

[0050] However, in reality, the industrial control computer cover 13 may have local bulges or depressions due to unevenness, deformation of the industrial control computer shell 15, or placement errors. At this time, the electromagnetic blocks 25 in different positions are pressed down to different degrees, resulting in differences in the height of their corresponding horizontal contact pieces 28. This will cause two situations and trigger corresponding fine-tuning actions through the circuit.

[0051] In the first scenario, a localized area of ​​the industrial control computer chassis cover 13 protrudes excessively upwards relative to the ideal plane. The electromagnetic block 25 located below this protruding area will be pushed up, further compressing its spring rod 26. Consequently, the horizontal contact 28 at the upper end of the spring rod 26 moves upwards. When the horizontal contact 28 reaches a certain height, it contacts a fine-tuning cylinder drive contact 27 fixedly mounted above it. This fine-tuning cylinder drive contact 27 is connected to another external control circuit. Once the horizontal contact 28 contacts the fine-tuning cylinder drive contact 27, the control circuit is activated, immediately sending a drive signal to the corresponding fine-tuning cylinder 22. The fine-tuning cylinder 22 then... Upon receiving the signal, the piston rod of the fine-tuning cylinder 22 extends downward rapidly. The downward pressure of the piston rod is transmitted to the electromagnetic block 25 through the spring rod 26, thereby applying a downward corrective pressure to the area of ​​the industrial control computer box cover 13 that is too high. This downward pressure forces the local protrusion to move downward until its height is restored to be level with other areas. When the surface of the industrial control computer box cover 13 is flattened, the electromagnetic block 25 and the spring rod 26 rise, the horizontal contact 28 descends and separates from the fine-tuning cylinder drive contact 27, the control circuit is disconnected, the fine-tuning cylinder 22 stops operating and may retract, thus completing one automatic downward fine-tuning of the protrusion.

[0052] In the second scenario, a localized area of ​​the industrial control computer chassis cover 13 is recessed too low relative to the ideal plane. Corresponding to this recessed area, the electromagnetic block 25 below it, due to its lower contact surface, will extend further downwards under the action of the spring. Its spring rod 26 will be less compressed, and the horizontal contact piece 28 at the upper end of the spring rod 26 will be in a relatively low position. When the horizontal contact piece 28 moves down to a certain height, it will contact an electromagnetic block energizing contact 29 fixedly installed below. The electromagnetic block energizing contact 29 is connected to the power supply circuit of the electromagnetic block 25. Once the horizontal contact piece 28 contacts the electromagnetic block energizing contact 29, the power supply circuit is turned on, and current flows through the electromagnetic block. The coil inside block 25 is instantly energized and magnetized, becoming an electromagnet with strong magnetic force. The magnetized electromagnet 25 generates an upward magnetic attraction force, which pulls the recessed part of the industrial control computer box cover 13, which is made of steel or other magnetic materials, upward to fill the recess and raise the area to the ideal height. When the surface of the industrial control computer box cover 13 is pulled up and flat, the position of the electromagnet 25 and the spring rod 26 rises, the horizontal contact 28 rises accordingly and separates from the energized contact 29 of the electromagnet, the power supply circuit is disconnected, the electromagnet 25 loses power and demagnetizes, and the magnetic attraction force disappears. This completes one automatic upward attraction fine adjustment of the recessed area.

[0053] The above monitoring and fine-tuning process is dynamic and real-time. Before welding begins, the system performs preliminary calibration. During the welding process, the level of the industrial control computer cover 13 may change dynamically due to local thermal expansion or stress changes. The system can continuously monitor and make fine-tuning compensation in real time to ensure that the industrial control computer cover 13 remains in a precise horizontal position throughout the entire critical stage from the start of welding to the cooling and solidification of the weld, thus fundamentally avoiding welding quality defects caused by the tilt of the industrial control computer cover 13.

[0054] After ensuring the stability and horizontal fixation of the industrial control computer housing 15 and the industrial control computer housing cover 13, the laser welding robot 3 begins to work. It moves along the robot track 2 and adjusts its posture to accurately position the laser focusing head at the joint between the industrial control computer housing 15 and the industrial control computer housing cover 13 for laser welding. While welding is in progress, another innovative function of this invention—the rotating airflow cooling system—starts. The two sets of counter-rotating fans set in the through-holes 23 inside all the internal adjustment blocks 24 begin to rotate. Since the fans at both ends rotate in opposite directions, a stable unidirectional airflow is formed in a single through-hole 23, which draws in air from one end and discharges it from the other end. Multiple internal adjustment blocks 24 surround the central plate 18, and the opening direction of the through-holes 23 on them is designed so that the airflow discharged from some holes can be drawn in by the adjacent holes. In this way, around the center plate 18 and the industrial control computer box cover 13, multiple internal adjustment blocks 24 work together to form a continuous airflow field rotating around the weld area. This rotating airflow field directly acts on the high-temperature area of ​​the weld being welded, and its effects include: First, accelerating the cooling and solidification rate of the weld and heat-affected zone metal, shortening the existence time of the molten pool, thereby reducing the time window for material deformation due to its own weight or stress at high temperatures; Second, forced convection cooling can remove a large amount of heat, which helps to reduce welding deformation and internal stress; Third, the airflow can blow away the small amount of smoke or spatter that may be generated during the welding process, keeping the welding area clean. This active cooling system, combined with the aforementioned anti-deformation fixing and leveling fine-tuning system, forms a complete closed-loop control system to ensure welding quality, from fixing, monitoring, adjustment to cooling.

[0055] Furthermore, during the welding process, when the area to be welded is blocked by an extended inner adjustment block 24, the corresponding adjusting cylinder 21 receives a command from the control system. The piston rod of the adjusting cylinder 21 retracts, causing the corresponding inner adjustment block 24 to retract inward a short distance, temporarily separating its end face from the inner wall of the industrial control computer housing 15. This makes way for the laser welding head, preventing the laser beam from being blocked or the inner adjustment block 24 from being accidentally damaged by the laser. After welding at this location is completed, the adjusting cylinder 21 extends again, restoring the inner adjustment block 24 to its tightened state, continuing its function of fixing and supporting the fine-tuning components. This localized temporary retraction function ensures 100% weld accessibility without affecting the overall fixing and fine-tuning effect.

[0056] In summary, the welding device for industrial control chassis production provided by this invention effectively prevents deformation of the thin-walled chassis shell by combining external clamping and internal support; through an innovative level monitoring and electromagnetic-mechanical fine-tuning system, the levelness of the industrial control chassis cover is ensured in real time throughout the welding process; and through the reverse fan group on the surrounding adjustable inner module, an efficient rotating airflow cooling field is formed around the weld. These technical features are interconnected and work synergistically to creatively solve a series of technical problems in industrial control chassis welding, such as difficulty in deformation control, difficulty in maintaining accuracy, and large heat-affected zones, significantly improving welding quality and production efficiency, and possessing outstanding substantive characteristics and significant progress.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding device for the production of industrial control computer chassis, characterized in that: include Welding base (1), a robot rail (2) is installed on the welding base (1), a laser welding robot (3) is slidably installed on the robot rail (2), and an industrial control computer box welding assembly (4) is installed on one side of the welding base (1). The industrial control computer chassis welding assembly (4) includes two sets of side support plates (5) symmetrically fixed on one side of the welding base (1). The upper and lower ends of the two sets of side support plates (5) are fixedly connected to a fixing plate (8). A vertical guide rod (7) is connected between the upper and lower fixing plates (8). A chassis support plate (9) for supporting the industrial control computer chassis shell (15) is fitted on the vertical guide rod (7). A chassis lifting cylinder (6) is installed on the lower fixing plate (8). The output end of the chassis lifting cylinder (6) is fixed to the bottom of the chassis support plate (9). A side mounting plate (14) is fixedly connected between the upper ends of the two sets of side support plates (5). A longitudinal pressing cylinder (16) is installed on the side mounting plate (14), and a transverse pressing cylinder (17) is installed on the upper end of the side support plate (5). The output ends of the longitudinal pressing cylinder (16) and the transverse pressing cylinder (17) are both fixedly connected to a pressing plate (30) for pressing the industrial control computer housing (15) from the outside. A mounting bracket (12) is fixed between the upper ends of the two sets of side support plates (5). A center plate lifting cylinder (10) is installed on the upper end of the mounting bracket (12). A magnetic head (11) is fixedly connected to the output end of the center plate lifting cylinder (10). The magnetic head (11) attracts the center plate (18). The center plate (18) is placed on the industrial control computer box cover (13). A longitudinal internal adjustment component (19) is installed on the front and rear sides of the center plate (18), and a transverse internal adjustment component (20) is installed on the left and right sides. Both the longitudinal internal adjustment component (19) and the transverse internal adjustment component (20) include an adjustment cylinder (21). The output end of the adjustment cylinder (21) is fixedly connected to an internal adjustment block (24). The internal adjustment block (24) is provided with a through air hole (23). Fans with opposite rotation directions are installed at both ends of the through air hole (23). A fine adjustment cylinder (22) is installed at the upper end of the internal adjustment block (24). A spring rod (26) is fixedly connected to the output end of the fine adjustment cylinder (22). An electromagnetic block (25) is fixedly connected to the lower end of the spring rod (26). The upper end of the spring rod (26) is provided with a horizontal contact piece (28), and the inner adjustment block (24) is provided with a fine-tuning cylinder drive contact (27) above the horizontal contact piece (28) and an electromagnetic block energizing contact (29) below.

2. The welding device for industrial control computer chassis production according to claim 1, characterized in that: The cylinder body of the regulating cylinder (21) is fixed inside the center plate (18) and is used to drive the inner adjusting block (24) to move laterally or longitudinally so as to press against or disengage from the inner wall of the industrial control computer housing (15) from the inside.

3. The welding device for industrial control computer chassis production according to claim 2, characterized in that: The horizontal contact (28), the fine-tuning cylinder drive contact (27), and the electromagnetic block energizing contact (29) constitute a levelness monitoring and fine-tuning circuit. When all the horizontal contact (28) are aligned, the external indicator light circuit is turned on. When any horizontal contact (28) moves up to contact the corresponding fine-tuning cylinder drive contact (27), the fine-tuning cylinder (22) at that location is triggered to press down. When any horizontal contact (28) moves down to contact the corresponding electromagnetic block energizing contact (29), the electromagnetic block (25) at that location is triggered to generate magnetic attraction.

4. The welding device for industrial control computer chassis production according to claim 3, characterized in that: The two ends of the through-hole (23) are provided with filter screens, and the through-holes (23) on the multiple inner adjustment blocks (24) work together to form a rotating airflow field around the center plate (18).

5. A welding device for the production of industrial control computer chassis according to claim 4, characterized in that: The regulating cylinder (21) can controllably drive the inner adjusting block (24) to retract, so as to avoid the weld seam at the corresponding position when the laser welding robot (3) is welding.

6. The welding device for industrial control computer chassis production according to claim 5, characterized in that: The fine-tuning cylinder (22) drives the electromagnetic block (25) to press down to correct the protruding part of the industrial control computer box cover (13). The electromagnetic block (25) generates magnetic force when energized to attract and lift the recessed part of the industrial control computer box cover (13).

7. A welding device for the production of industrial control computer chassis according to claim 6, characterized in that: The clamping plate (30) and the inner adjusting block (24) apply forces in opposite directions from the outside and inside of the industrial control computer housing (15) to achieve anti-deformation clamping of the industrial control computer housing (15).

8. A welding method for manufacturing industrial control computer chassis, using the welding apparatus for manufacturing industrial control computer chassis as described in any one of claims 1-7, characterized in that, Includes the following steps: S1: Place the industrial control computer chassis (15) on the chassis tray (9), lift the chassis tray (9) to the working height by using the chassis lifting cylinder (6), and place the industrial control computer cover (13) on the industrial control computer chassis (15). S2: The clamping plate (30) is driven by the longitudinal clamping cylinder (16) and the transverse clamping cylinder (17) to clamp and fix the industrial control computer box shell (15) from the outside. S3: The magnetic suction head (11) and the center plate (18) are driven to move down by the center plate lifting cylinder (10), so that the center plate (18) is placed on the industrial control computer box cover (13). Then, the internal adjustment block (24) is driven to press against the inner wall of the industrial control computer box shell (15) from the inside by the adjustment cylinder (21) in the longitudinal internal adjustment component (19) and the transverse internal adjustment component (20), so as to achieve internal and external coordinated clamping. After that, the center plate lifting cylinder (10) drives the magnetic suction head (11) to move up and reset, and the center plate (18) remains in the original position. S4: The monitoring system, consisting of a horizontal contact (28), a fine-tuning cylinder drive contact (27), and an electromagnetic block energized contact (29), monitors the levelness of the industrial control computer box cover (13) in real time. By triggering the fine-tuning cylinder (22) to press down or the electromagnetic block (25) to be energized and attracted, the protrusions or depressions of the industrial control computer box cover (13) are dynamically fine-tuned to keep it level. S5: Start the fan in the through-hole (23) of the inner adjustment block (24) to form a rotating airflow field in the weld area for auxiliary cooling; S6: Control the laser welding robot (3) to move along the robot track (2) and weld the weld. When the welding path interferes with the inner adjustment block (24), control the corresponding adjustment cylinder (21) to temporarily retract the inner adjustment block (24) to avoid interference. S7: After welding is completed, release each cylinder in sequence and remove the welded workpiece.

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