Automatic support arm machining device and method for computer external display

Abstract

The invention relates to the technical field of display supporting arm laser welding machining, in particular to an automatic supporting arm machining device and method for a computer external display. The automatic supporting arm machining device comprises a machine table for conveying a tubular supporting arm from left to right, and the left end and the right end of the machine table are provided with a feeding position and a laser welding device correspondingly; the limiting part is movably arranged on the rear side of the machine table and comprises a bearing rotating shaft used for clamping and conveying the tubular supporting arm; and the ceramization pretreatment part is arranged close to the feeding position. A two-point type flexible clamping mode of middle supporting and end inner supporting locking is adopted, the middle of a pipe fitting is clamped in a self-adaptive mode through a supporting device, a locking device supports the pipe end from the interior through an external expansion supporting plate capable of expanding in the radial direction, and meanwhile the expandable heat-resisting capsule is used for conducting electricity from the exterior in a flexible sleeving mode. And compared with a mode of directly fusion welding the complete ceramic membrane and the base metal, the problems of poor combination, stress concentration and the like caused by too large difference of physical properties of the ceramic membrane and the base metal can be effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of laser welding processing technology for display arms, and more particularly to an automated processing device and method for computer external display arms. Background Technology

[0002] To achieve both lightweight design and structural strength, computer external monitor arms are often made from thin-walled aluminum alloy tubing, and the production process mainly involves multiple steps such as cutting, pretreatment, and welding.

[0003] Existing laser welding technologies, such as the computer monitor arm processing device disclosed in CN120095440B, allow multiple main welding plate positioning blocks to move independently. When positioning irregularly shaped plates to be welded, the positioning points of the plates to be welded can be freely adjusted so that the starting and ending points of the welding are both on the auxiliary welding plates. This makes the arc more stable when the plasma welding head welds the plates to be welded. However, for monitor arm tubes with large length-to-diameter ratios and thin walls that are easily deformed, this rigid clamping method can easily lead to local wall indentation or overall bending when force is not applied at multiple points, affecting the subsequent docking accuracy and welding quality.

[0004] For example, a single-sided welding device disclosed in CN102079026B can keep the tip of the welding wire supply nozzle aligned with the welding line even when the welding machine beam bends downwards due to the load of the welding trolley while it travels along the side of the welding machine beam. However, it does not consider the impact of welding heat input on the clamping area. In particular, the thin support arm lacks sufficient stress support. For processes with concentrated local heat input, such as laser welding, the pipe material near the clamping point will experience additional stress due to thermal expansion and constraint by the clamp, exacerbating welding deformation and even causing weld cracking. The lack of continuity between the welding and pretreatment processes makes the aluminum alloy support arm structure highly susceptible to deformation due to stress and changes in temperature, seriously affecting the welding quality. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that the existing technology lacks an effective ceramic film pretreatment technology that can provide an ideal metallurgical bonding interface for laser welding of aluminum alloy tubular arms, resulting in low weld joint strength and easy deformation. Therefore, this invention proposes an automated computer external display arm processing device and processing method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an automated support arm processing device for computer external displays, comprising a machine base for conveying tubular support arms from left to right, with a loading position and a laser welder respectively provided at the left and right ends of the machine base, and further comprising: a limiting part, the limiting part being movably disposed at the rear side of the machine base, and the limiting part including a load-bearing rotating shaft, wherein a support and a locking device for longitudinally fixing the tubular support arm at two points are provided on the load-bearing rotating shaft; The ceramic pretreatment section is located near the feeding position and includes a sealed processor, a plasma power supply, an electrolyte cooling circuit, a secondary cooler and a conductive connector. The sealed processor is filled with a weakly alkaline electrolyte containing silicates and / or phosphates. The limiting part immerses the lower end of the tubular support arm into the energized weakly alkaline electrolyte to generate a porous, high-hardness ceramic oxide film. The stirring consumption treatment unit is located near the laser welder and includes a noise reduction filling cylinder, a hollow rotating shaft, a dynamic lifting platform, and a composite tool grinding head. The noise reduction filling cylinder is filled with polishing gravel. The dynamic lifting platform supports the polishing gravel, and the composite tool grinding head and the load-bearing rotating shaft rotate in opposite directions to break and disperse the ceramic oxide film on the lower end of the tubular support arm. The laser welder performs laser welding on the lower end of the tubular support arm, which has undergone dual treatment in the ceramic pretreatment section and the stirring consumption section, so that the ceramic oxide film is mixed and dispersed with the plastically flowing matrix material to form a metallurgical bond.

[0007] Preferably, the limiting part includes a movable slider that is slidably installed on the rear side of the machine and moves back and forth in a straight line along the left and right direction. A lifting bracket that moves vertically back and forth is slidably installed in the movable slider, and the load-bearing shaft is rotatably installed on the lifting bracket.

[0008] Preferably, the support includes two limiting clamps at the middle of corresponding tubular arms, and the two limiting clamps move towards each other to fix the middle of the tubular arms.

[0009] Preferably, the locking device includes a plurality of outwardly expanding support plates extending into the upper end of the tubular support arm, the plurality of outwardly expanding support plates expanding in opposite directions from the inside to the outside to support the upper end of the tubular support arm, and the locking device further includes a sealing cover, in which a heat-resistant capsule is embedded to be filled with gas to fit the upper end of the tubular support arm.

[0010] Preferably, the electrolyte cooling circuit is used to dissipate heat from the weakly alkaline electrolyte, and the electrolyte cooling circuit consists of an electrolytic cell, a coolant condenser, a heat conduction column assembly, and a recovery pipe assembly. The electrolyte cooling circuit is filled with an aqueous ferromagnetic fluid, and the heat conduction column assembly is immersed in the weakly alkaline electrolyte.

[0011] Preferably, the recovery pipe assembly has a two-section structure. The secondary cooler is used to dissipate heat from the electrolyte cooling circuit. The secondary cooler includes a first return straight pipe, a near-circular pipe, and a second return straight pipe integrally connected to the recovery pipe assembly. The first return straight pipe is connected to the outlet end of the heat conduction column assembly through one section of the recovery pipe assembly. The second return straight pipe is connected to the inlet end of the coolant condenser through the other section of the recovery pipe assembly. The sealed processor is equipped with an intelligent controller. An electromagnetic ring array and temperature sensors are equidistantly distributed on the near-circular pipe.

[0012] Preferably, the first return straight pipe, the near-circular annular pipe, and the second return straight pipe are non-magnetic pipes.

[0013] Preferably, the electromagnetic ring array consists of multiple sets of guiding rings and electromagnetic rings, with each guiding ring located between two electromagnetic rings, and each electromagnetic ring in the electromagnetic ring array is independently electrically connected to the intelligent controller.

[0014] Preferably, the dynamic lifting platform is slidably mounted on the hollow rotating shaft, and the noise-reducing filling cylinder and the dynamic lifting platform are respectively provided with a driving ratchet group and a driven ratchet group that are in active contact, and a water supply pipe is fixedly connected to the dynamic lifting platform.

[0015] Regarding the processing method of the aforementioned automated support arm processing device for computer external monitors, the processing method includes the following steps: Step S1: Place the tubular support arm longitudinally at the feeding position, initially clamp the middle part of the tubular support arm with the limiting clamp, and then use the outward expansion support plate to support the upper end of the tubular support arm from the inside to the outside. At the same time, use the filled heat-resistant capsule to enclose the upper end of the tubular support arm. Step S2: Using the limiting part, place the lower end of the tubular support arm into the electrolytic cell, connect the electrodes to the tubular support arm through the conductive connector, start the plasma power supply, and perform plasma electrolytic oxidation on the lower end of the tubular support arm for 1-5 minutes to generate a ceramic oxide film with a thickness of 5-20 μm. During this process, the temperature of the weak alkaline electrolyte is controlled at 20-40℃ through the electrolyte cooling circuit. In step S3, the aqueous ferrofluid flows through the electrolyte cooling circuit and passes sequentially through the first return straight pipe, the near-circular pipe, and the second return straight pipe. When the temperature sensor detects a hot spot on the wall of the near-circular pipe, the intelligent controller instantly energizes one of the electromagnetic rings at the hot spot and another electromagnetic ring upstream of it, and marks them as electromagnetic ring E1 and electromagnetic ring E0, respectively. The strong gradient magnetic field generated between electromagnetic rings E1 and E0 rapidly adsorbs and locks the magnetic fluid nanoparticles flowing through this section of water into the hot spot area on the inner wall of the near-circular pipe, forming a dynamic, high thermal conductivity magnetic liquid coating or agglomerate. The thermal conductivity of the magnetic fluid itself is much higher than that of water. The coating becomes an efficient thermal bridge from the pipe wall to the water body to reduce thermal resistance. The adsorbed magnetic fluid agglomerate destroys the original laminar boundary layer, causing the mainstream cold water flowing through this area to mix violently with the pipe wall, and the heat exchange efficiency is increased by orders of magnitude. At the same time, the flow guide ring structure further amplifies this turbulence effect. The small amount of magnetic fluid that is not adsorbed continues to flow downstream and enters the next electromagnetic ring control area waiting to be triggered. Step S4: The tubular support arm, after being treated by the ceramic pretreatment section, is transferred to the noise reduction filling cylinder of the stirring consumption treatment section. The tubular support arm is driven to rotate clockwise by the load-bearing rotating shaft, which in turn drives the hollow rotating shaft to rotate counterclockwise and supplies water to the water supply pipe. The hollow rotating shaft drives the dynamic lifting platform to rotate synchronously. Due to the intermittent pressure applied by the driven ratchet group, the dynamic lifting platform drives the composite tool grinding head to move spirally up and down inside the lower end of the tubular support arm. At the same time, the polishing grit makes dynamic contact with the lower end of the tubular support arm, so that the lower end of the tubular support arm is locally preheated to 150-250°C. In step S5, the lower end of the tubular support arm is moved to the right end of the corresponding laser welder using the limiting part. During the welding process, the sheared and broken ceramic oxide film is fully mixed and dispersed with the plastically flowing matrix material to form a metallurgical bond.

[0016] Compared with the prior art, the present invention has the following advantages: 1. This invention adopts a two-point flexible clamping method with central support and end internal bracing and locking. The support device achieves adaptive clamping of the middle of the pipe fitting, while the locking device, through a single drive source, enables the radially expandable outer support plate to support the pipe end from the inside, and the expandable heat-resistant capsule to be flexibly fitted from the outside and conduct electricity. At the same time, the expandable heat-resistant capsule is flexibly fitted from the outside and conducts electricity, and is mechanically locked in conjunction with the outer support plate. This composite clamping method distributes force evenly, which helps to reduce contact stress and avoid clamping damage. The flexible nature of the heat-resistant capsule allows it to absorb the slight expansion of the pipe end caused by heat during subsequent laser welding, releasing thermal stress and thus suppressing workpiece deformation caused by clamping constraints and welding heat.

[0017] 2. This invention employs an intelligent thermal management system for the ceramic pretreatment section equipped with an electrolyte cooling circuit and a secondary cooler. In particular, the electromagnetic ring array in the secondary cooler works in conjunction with temperature sensors and an intelligent controller to detect and locate hot spots in the cooling pipeline in real time. By triggering specific electromagnetic rings to generate a gradient magnetic field, magnetic particles in the aqueous ferrofluid are instantly concentrated at the hot spots, forming a dynamic high thermal conductivity coating and enhancing turbulent heat transfer. This ensures that the electrolyte temperature is strictly controlled within the preferred range of 20-40℃ during plasma electrolytic oxidation, thereby obtaining a ceramic oxide film with uniform structure and consistent performance, creating an ideal material state for subsequent laser welding.

[0018] 3. This invention enables the tubular support arm to sequentially complete plasma electrolytic oxidation (generating a ceramic film) and stirring, crushing, and dispersing treatment after being clamped once by the limiting part; wherein, the stirring consumption treatment part uses a composite tool grinding head to rotate in the opposite direction and feed spirally in the polishing gravel medium to mechanically crush and preheat the ceramic oxide film at the tube end, realizing a continuous process of online modification and online preparation, reducing the probability of waiting and contamination between processes, and improving production efficiency.

[0019] 4. In this invention, the pre-treated ceramic oxide film is broken and dispersed to fully mix with the preheated and activated matrix material. Under the high energy density of laser welding, the dispersed ceramic particles can interact more fully with the molten aluminum alloy matrix, acting as an in-situ reinforcing phase to promote the formation of fine-grained metallurgical bonding. Compared with the method of directly welding the complete ceramic film to the base material, this method can effectively avoid problems such as poor bonding and stress concentration caused by the large difference in physical properties between the two. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an automated support arm processing device for computer external displays proposed in this invention. Figure 2 This is a bottom view of an automated support arm processing device for a computer external display proposed in this invention; Figure 3 This is a front sectional view of an automated support arm processing device for a computer external display proposed in this invention. Figure 4 This is a schematic diagram of the limiting part structure of an automated support arm processing device for computer external displays proposed in this invention; Figure 5 This is a bottom view of the limiting part structure of an automated support arm processing device for computer external displays proposed in this invention; Figure 6 This is a cross-sectional view of the locking device structure of an automated support arm processing device for a computer external display proposed in this invention; Figure 7This is a schematic diagram of the ceramic pretreatment section of an automated support arm processing device for computer external displays proposed in this invention. Figure 8 This is a cross-sectional view of the ceramic pretreatment section of an automated support arm processing device for computer external displays proposed in this invention. Figure 9 This is a schematic diagram of the electrolyte cooling circuit and secondary cooler structure of an automated support arm processing device for computer external displays proposed in this invention. Figure 10 This is a cross-sectional view of the electrolyte cooling circuit and secondary cooler structure of an automated support arm processing device for computer external displays proposed in this invention. Figure 11 This is a schematic diagram of the stirring consumption processing unit of an automated support arm processing device for computer external displays proposed in this invention. Figure 12 This is a cross-sectional view of the stirring consumption processing unit of an automated support arm processing device for a computer external display proposed in this invention. Figure 13 This is a schematic diagram of a tubular support structure; Figure 14 This is a cross-sectional view of the tubular support structure.

[0021] In the diagram: 1. Machine base; 2. Limiting part; 21. Moving slider; 22. Lifting bracket; 23. Load-bearing rotating shaft; 24. Hoisting frame; 25. Support; 251. Driving slider; 252. Limiting clamp; 253. First connecting rod; 26. Locking device; 261. Hollow sleeve; 262. Driving mountain-shaped bracket; 263. Outer expansion support plate; 264. Second connecting rod; 265. Sealing cover; 266. Heat-resistant capsule; 267. Mountain-shaped piston chamber; 268. Pressure boosting piston; 3. Ceramicization pretreatment section; 31. Sealed processor; 32. Plasma power supply; 33. Electrolyte cooling circuit; 331. Electrolytic cell; 3311. Tank body; 3312. Liquid inlet; 33 13. Liquid outlet; 332. Coolant condenser; 333. Heat conduction column assembly; 334. Recovery pipe assembly; 34. Secondary cooler; 341. First return straight pipe; 342. Near-circular annular pipe; 343. Second return straight pipe; 344. Intelligent controller; 345. Electromagnetic ring array; 3451. Guide ring; 3452. Electromagnetic ring; 346. Temperature sensor; 35. Conductive connector; 4. Stirring consumption treatment unit; 41. Noise reduction filling cylinder; 42. Hollow rotating shaft; 43. Dynamic lifting platform; 44. Composite tool grinding head; 45. Driven gear; 46. Drive ratchet assembly; 47. Driven ratchet assembly; 48. Water supply pipe; 49. Water injection micropores; 410. Evaporation micropores. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] Reference Figures 1-14 An automated support arm processing device for computer external displays includes a machine base 1 that conveys tubular support arms from left to right. The machine base 1 has a feeding position and a laser welder at its left and right ends, respectively. It also includes a limiting part 2, a ceramic pretreatment part 3, and a stirring and consumption treatment part 4. It realizes a fully automated production line operation of tubular support arms from feeding to ceramic pretreatment, to stirring, crushing and preheating, and finally to laser welding. The laser welder performs laser welding on the lower end of the tubular support arm after dual treatment by the ceramic pretreatment part 3 and the stirring and consumption treatment part 4, so that the ceramic oxide film and the plastic flow matrix material are mixed and dispersed to form a metallurgical bond.

[0024] The limiting part 2 is movably located at the rear side of the machine base 1, and the limiting part 2 includes a movable slider 21, a lifting bracket 22, a load-bearing rotating shaft 23, a hoisting frame 24, and a locking device 26. The movable slider 21 is slidably mounted on the rear side of the machine base 1 and moves back and forth in a straight line along the left and right direction. In some embodiments, it is driven by a ball screw module driven by a high-precision linear motor or servo motor, and moves along the hardened guide rail on the rear side of the machine base 1 along the X-axis (left and right). Its function is to achieve rapid and accurate positioning of the tubular support arm between the four core work stations (feeding, PEO treatment, mixing treatment, and welding).

[0025] The lifting bracket 22 is slidably mounted in the movable slider 21 and performs longitudinal reciprocating lifting and lowering movement. In some embodiments, it is integrated into the movable slider 21 and driven by a servo electric cylinder or pneumatic cylinder to achieve Z-axis (vertical) lifting and lowering. Its intended function is to control the depth of the lower end of the tubular support arm immersed in the electrolyte, adjust the relative position during stirring, and set the focal length height for laser welding.

[0026] The load-bearing rotating shaft 23 is rotatably mounted on the lifting bracket 22. In some embodiments, it is driven by a servo motor and reducer installed in the lifting bracket 22 to rotate around its own axis C. This is a key active motion in the stirring and consumption process and an optional action to ensure the uniformity of the coating during PEO treatment.

[0027] The lifting frame 24 is fixedly connected to the middle end of the load-bearing rotating shaft 23, and a support 25 corresponding to the middle of the tubular support arm is provided on the lifting frame 24. The support 25 includes a drive slider 251 and a limiting clamp 252. The clamping action of the support 25 originates from the longitudinal movement of the drive slider 251. The drive slider 251 can be driven by a miniature rodless cylinder or an electric push rod. When the drive slider 251 moves upward, the force is decomposed through two sets of first connecting rods 253 and converted into two limiting clamps 252 moving in opposite directions along the guide rail of the lifting frame 24, thus completing the V-shaped or arc-shaped gripping of the middle of the tubular support arm. The drive slider 251 is slidably mounted on the lifting frame 24. The drive slider 251 can be driven by a miniature rodless cylinder or electric push rod, or by a miniature servo motor in conjunction with a lead screw and nut pair, to provide more precise displacement control and position feedback, which is convenient for integration into the main control system.

[0028] Two limiting clamps 252 are symmetrically slidably mounted on the lifting frame 24. A first connecting rod 253 is pin-connected between the limiting clamps 252 and the drive slider 251. The two limiting clamps 252 move towards each other to clamp the middle of the tubular support arm. It should be noted that by creating arc grooves or V-grooves corresponding to the tubular support arm in the limiting clamps 252, and embedding rubber pads within the grooves (preferably polyurethane or nitrile rubber), not only is anti-slip cushioning provided, but their resistivity (typically around 10) is also reduced. 6 -10 9 The range of Ω·cm can also help to avoid stray current interference with precision clamping to some extent. The arc grooves or V-grooves on the clamping plate should be high-frequency hardened or inlaid with hard alloy blocks to enhance wear resistance and ensure positioning accuracy under long-term use.

[0029] The locking device 26 is located at the lower end of the load-bearing shaft 23, and works in conjunction with the support device 25 to fix the tubular support arm at two points. The locking device 26 includes a hollow sleeve 261, a drive U-shaped bracket 262, an outer expansion plate 263, a sealing cover 265, a heat-resistant capsule 266, and a pressure boosting piston 268. It adopts an internal support and external clamping linkage method, which is driven by the single axial movement of the drive U-shaped bracket 262, which is driven downward by a small built-in electric cylinder: the hollow sleeve 261 is fixedly connected to the lower end of the load-bearing shaft 23.

[0030] The driving mountain-shaped bracket 262 is slidably fitted into the load-bearing rotating shaft 23 and the hollow sleeve 261; there are 2-4 outward expansion support plates 263, and the pins of the outward expansion support plates 263 are installed in the hollow sleeve 261. The pins of the outward expansion support plates 263 and the driving mountain-shaped bracket 262 are connected by a second connecting rod 264. The downward moving driving mountain-shaped bracket 262 converts the axial force into the radial expansion movement of 2-4 outward expansion support plates 263 through multiple sets of second connecting rods 264, so that it produces an interference fit with the inner wall of the upper end of the tubular support arm, and achieves rigid positioning from the inside.

[0031] The sealing cover 265 is fixedly connected to the drive U-shaped bracket 262. The heat-resistant capsule 266 is fixedly embedded in the sealing cover 265. The heat-resistant capsule 266 is preferably made of fluororubber because it has excellent high temperature resistance (long-term operating temperature > 200°C), acid and alkali corrosion resistance, and good compatibility with conductive fillers, making it an ideal material that simultaneously meets the requirements of sealing, heat resistance, and conductivity. Alternatively, silicone rubber can be used with conductive carbon black / carbon nanotubes. Silicone rubber has excellent flexibility and can achieve stable conductivity by filling it with conductive materials. It is also relatively inexpensive, but its long-term heat resistance and chemical resistance are slightly inferior to fluororubber. The sealing cover 265 has a U-shaped piston cavity 267 that connects to the heat-resistant capsule 266. The pressurizing piston 268 is fixedly installed in the hollow sleeve 261 and slidably fitted in the U-shaped piston cavity 267. The synchronously moving sealing outer cover 265 causes its internal mountain-shaped piston chamber 267 to move downward relative to the fixed pressure boosting piston 268. According to Boyle's law, this causes the air inside the mountain-shaped piston chamber 267 to be compressed, increasing the pressure. This causes the heat-resistant capsule 266 (made of silicone or fluororubber) to inflate and tightly wrap around the upper outer wall of the tubular support arm. This not only provides additional flexible clamping force to prevent rotational slippage, but its conductivity also makes it an ideal conductive path to conduct current from the conductive connector 35 to the tubular support arm.

[0032] In some implementations, to prevent overpressure damage to the heat-resistant capsule 266, a miniature overflow valve or pressure sensor can be installed on the sealing cover 265 or related gas lines to stop the downward movement or release pressure when the pressure reaches a set threshold of 0.3-0.5 MPa.

[0033] Comparison Projects Traditional three-jaw chuck + tailstock pin Limiting part 2 Advanced features Clamping efficiency Manual / pneumatic operation is required, and coaxiality needs to be calibrated. Each operation takes approximately 30 seconds. One-click automatic middle support and upper inner and outer support, approximately 8 seconds per piece. Efficiency increased by 275%, suitable for automated production lines Positioning accuracy Depending on the chuck's accuracy, the repeatability is approximately ±0.05mm. The inner support and outer clamping form a constraint, which, combined with a precision linear module, achieves a repeatability accuracy of ±0.01mm. The accuracy has been improved by 5 times, laying the foundation for subsequent processes. Workpiece adaptability The clamps need to be replaced; it has poor adaptability to different pipe diameters. The outwardly extending support plate has an adjustable stroke, and the heat-resistant capsule 266 adapts to deformation, making it compatible with pipe fittings of a certain diameter range. Flexibility and versatility have been significantly enhanced. Conductivity and sealing Additional conductive and sealing devices are required, resulting in a complex structure. The heat-resistant capsule 266 achieves flexible sealing, auxiliary clamping, and conductivity in an integrated design. Functional integration, simplified structure, and improved reliability Experiments show that the limiting part 2, through its innovative two-point flexible locking mechanism with internal support and external gripping, integrates high-precision positioning, rapid clamping, and adaptive sealing and conductivity, which helps to solve the bottleneck of traditional fixtures in automated and flexible production.

[0034] The ceramic pretreatment unit 3 is located near the loading position. The lower end of the tubular support arm is immersed in an electrically charged weakly alkaline electrolyte to generate a porous, high-hardness ceramic oxide film. The ceramic pretreatment unit 3 includes a sealed processor 31, a plasma power supply 32, an electrolyte cooling circuit 33, a secondary cooler 34, and a conductive connector 35. The sealed processor 31 is fixedly installed on the machine base 1. The sealed processor 31 has a double-layer structure, and the upper layer of the sealed processor 31 is filled with a weakly alkaline electrolyte containing silicates and / or phosphates.

[0035] The plasma power supply 32 is fixedly mounted on the sealed processor 31 and is in contact with the weakly alkaline electrolyte. The plasma power supply 32 (usually a high-frequency bidirectional pulse power supply) provides energy.

[0036] The electrolyte cooling circuit 33 is filled with an aqueous ferromagnetic fluid to provide basic cooling. The aqueous ferromagnetic fluid is driven by an external circulation pump to flow through the heat transfer column assembly 333, indirectly removing heat from the weakly alkaline electrolyte. The aqueous ferromagnetic fluid is preferably water-based Fe3O4 magnetic fluid, with a saturation magnetization intensity between 20-50 kA / m. Too low a magnetization intensity results in insufficient magnetophoresis, while too high a intensity can easily lead to particle agglomeration and blockage of the pipeline. The added surfactant (such as sodium oleate) and possible dispersants (such as tetramethylammonium hydroxide) are crucial for maintaining the long-term stable suspension of nanoparticles under high temperature and shear force, preventing precipitation and failure. The electrolyte cooling circuit 33 is located in a sealed processor 31 for heat dissipation of the weakly alkaline electrolyte. The electrolyte cooling circuit 33 includes an electrolytic cell 331, a coolant condenser 332, a heat transfer column assembly 333, and a recovery pipe assembly 334. The electrolytic cell 331 consists of a cell body 3311, an inlet 3312 equipped with a one-way valve, and an outlet 3313. The cell body 3311 is fixedly mounted on the upper layer of the sealed processor 31. The inlet 3312 is located at the bottom of the cell body 3311, and the outlet 3313 is located on the side wall of the cell body 3311. Low-temperature weak alkaline electrolyte enters the electrolytic cell 331 unidirectionally through the inlet 3312, and high-temperature weak alkaline electrolyte is discharged from the electrolytic cell 331 through the outlet 3313.

[0037] The coolant condenser 332 is fixedly installed in the lower layer of the sealed processor 31.

[0038] The heat conduction column assembly 333 is fixedly installed in the sealed processor 31, that is, the heat conduction column assembly 333 is immersed in a weakly alkaline electrolyte, and the heat conduction column assembly 333 has an n-shaped channel that flows through the upper layer of the sealed processor 31.

[0039] The recovery pipe assembly 334 has a two-section structure and is used to connect the heat conduction column assembly 333 and the coolant condenser 332.

[0040] The secondary cooler 34 is used to dissipate heat from the electrolyte cooling circuit 33. The secondary cooler 34 includes a first return straight pipe 341, a near-circular pipe 342, and a second return straight pipe 343 integrally connected to the recovery pipe assembly 334. The first return straight pipe 341 is connected to the outlet end of the heat conduction column assembly 333 through one section of the recovery pipe assembly 334. The second return straight pipe 343 is connected to the inlet end of the coolant condenser 332 through another section of the recovery pipe assembly 334. An intelligent controller 344 is installed in the sealed processor 31. An electromagnetic ring array 345 and temperature sensors 346 are equidistantly distributed on the near-circular pipe 342. Figure 7 , Figure 8 When the intelligent controller 344 applies a current in the same direction to adjacent electromagnetic rings E0 and E1, a gradient field with magnetic field strength decreasing sharply from E0 to E1 is generated in the region between them. The magnetophore force experienced by the magnetic nanoparticles in this gradient field is: Fmag=Vp•Δχ•(B•▽)B / μ0 Where Vp is the particle volume and Δχ is the difference in magnetic susceptibility between the particle and the fluid.

[0041] This force is directed in the direction of stronger magnetic field (i.e., the E0 side), thereby driving the particles to move towards the tube wall (hot spot) and accumulate.

[0042] It should be noted that the first return straight pipe 341, the near-circular pipe 342, and the second return straight pipe 343 are non-magnetic pipes. Further explanation: the electromagnetic ring array 345 consists of multiple sets of guide rings 3451 and electromagnetic rings 3452. Each guide ring 3451 is located between two electromagnetic rings 3452, and the electromagnetic rings 3452 in each set of electromagnetic ring array 345 are independently electrically connected to the intelligent controller 344. It should be noted that the near-circular pipe 342 constitutes a distributed monitoring and response unit. When the temperature sensor 346 detects a hot spot on the pipe wall (possibly caused by external heat radiation or internal friction), the intelligent controller 344 instantaneously sends a pulse current to two specific electromagnetic rings 3452 (E0, E1) in the area where the hot spot is located, generating a gradient magnetic field with rapidly decaying spatial intensity.

[0043] It is worth noting that the gradient magnetic field exerts a strong magnetophore force on the nanomagnetic particles in the ferrofluid flowing through this section. The particles are rapidly dragged and adsorbed onto the inner wall of the tube in the hot spot area, self-assembling to form a dynamic, highly thermally conductive nanoparticle coating, thereby achieving triple-enhanced heat transfer. This process achieves triple-enhanced heat transfer: ① The coating itself has a much higher thermal conductivity than water, which reduces thermal resistance; ② Particle agglomerations disrupt the thermal boundary layer, inducing intense turbulence; ③ The 3451 flow guide ring structure further exacerbates fluid disturbance.

[0044] This on-demand, locally enhanced cooling mode offers orders of magnitude improvements in energy efficiency and temperature control accuracy compared to traditional full-area cooling.

[0045] A conductive connector 35 is mounted on the load-bearing shaft 23 and is electrically connected to the tubular support arm via a support 25 or a locking device 26. It should be noted that the conductive connector 35 (preferably a silver-based composite brush slip ring) ensures that the tubular support arm (anode) is connected to the power supply during rotation. Under the combined action of a pulse voltage of several hundred volts and the electrolyte, dielectric breakdown occurs in the micro-regions on the surface of the tubular support arm, generating a high-temperature, high-pressure plasma discharge. This causes a plasma electrochemical reaction between the base metal (such as Al, Mg, Ti) and oxygen and anions in the electrolyte, resulting in the in-situ growth of a ceramic oxide film, primarily composed of base metal oxides and doped with electrolyte components. It should be noted that the conductive connector 35 (such as a silver-graphite brush) must maintain good conductivity with the load-bearing shaft 23. A collector ring can be machined on the load-bearing shaft 23, and the brushes contact it; the current is then conducted to the drive mountain-shaped bracket 262 through the wire inside the shaft or directly through the metal components (it is necessary to ensure that there is an electrical connection design between it and the load-bearing shaft 23, such as using conductive grease or setting flexible wires), and finally transmitted to the tubular support arm through the heat-resistant capsule 266 doped with conductive filler.

[0046] The sensing-trigger-targeted adsorption mode implemented by the secondary cooler 34 is an active thermal management strategy that allocates cooling resources on demand. Only when hot spots appear will a high thermal conductivity barrier (magnetic fluid agglomerate) be formed locally and instantaneously, and its thermal conductivity can be several times higher than that of the base liquid water.

[0047] Comparison Projects Traditional anodizing Traditional PEO (external plate heat exchanger) cooling Ceramization Pretreatment Section 3 Advanced features Ceramic film hardness 200-400 800-1500 1000-1800 The hardness and wear resistance of the film layer are greatly improved. Membrane adhesion Mechanical fitting, weak bonding force Metallurgical bonding, strong bonding force Metallurgical bonding, strong bonding force Possesses inherent strong integration advantages Electrolyte temperature control accuracy ±5°C ±3°C ±1°C Temperature control accuracy has been significantly improved. Unit energy consumption (to achieve the same film thickness) Baseline 1.0 Approximately 1.5 (due to high energy consumption) Approximately 1.2 (Intelligent cooling energy saving) While achieving high-performance membrane layers, energy consumption is reduced by 20%. Process stability better Uneven film thickness due to edge effect Excellent performance; targeted cooling suppresses localized overheating, resulting in a more uniform film layer. Improve the consistency of the PEO process itself It is evident that by employing PEO technology to generate high-performance ceramic oxide films, and further through the innovative intelligent magnetic fluid targeted cooling system, the problem of precise temperature control under high heat load in the PEO process can be solved, thereby improving film quality while achieving energy saving, and the process stability surpasses that of traditional PEO.

[0048] Reference Figures 9-11 The stirring and processing unit 4 is located near the laser welder. Its function is to mechanically break up and disperse the brittle and hard ceramic oxide film, and to preheat the substrate. The stirring and processing unit 4 includes a noise-reducing filling cylinder 41, a hollow rotating shaft 42, a dynamic lifting platform 43, a compound tool grinding head 44, a drive ratchet assembly 46 and a driven ratchet assembly 47, a water supply pipe 48, and evaporation micropores 410. The dynamic lifting platform 43 supports polishing gravel, and the compound tool grinding head 44 rotates in opposite directions with the load-bearing rotating shaft 23 to break up and disperse the ceramic oxide film on the lower end of the tubular support arm. The noise-reducing filling cylinder 41 is fixedly installed on the machine base 1, and the noise-reducing filling cylinder 41 has a double-layer structure.

[0049] The hollow shaft 42 is rotatably installed inside the noise-reducing filling cylinder 41. The load-bearing shaft 23, driven by a servo motor, drives the tubular support arm to rotate clockwise at high speed. A driven gear 45 is keyed to the hollow shaft 42. In some embodiments, an external motor is set to drive the driven gear 45 through gear meshing, so that the hollow shaft 42, the dynamic lifting platform 43 fixed thereon, and the compound tool grinding head 44 rotate counterclockwise. The bidirectional rotation causes the compound tool grinding head 44 to generate an extremely high relative linear velocity with the inner wall of the tubular support arm, effectively breaking the ceramic oxide film.

[0050] The dynamic lifting platform 43 is longitudinally slidably mounted on the hollow rotating shaft 42 via a strong spring. The upper layer of the noise-reducing filling cylinder 41 is filled with polishing gravel located on the dynamic lifting platform 43. The polishing gravel is preferably brown corundum, which participates in friction under centrifugal force to assist in crushing and preheating. Cooling water is pumped in through the water supply pipe 48 and sprayed out through the water injection micro-holes 49 to precisely control the temperature of the friction zone, achieve a dynamic balance between crushing, preheating, and cooling, and prevent the tubular support arm base from overheating.

[0051] The composite tool grinding head 44 is fixedly connected to the dynamic lifting platform 43. It is preferably an electroplated diamond grinding head with a steel substrate and a working layer of diamond abrasive grains (80#-120# grit) coated with a Ni-Co alloy. Diamond has extremely high hardness and excellent crushing and grinding efficiency for ceramics such as Al2O3. Alternatively, a cubic boron nitride grinding head can be used, where CBN abrasive grains are welded to a cemented carbide substrate using an active brazing alloy under high temperature and vacuum. This results in high bonding strength, large chip space, and longer service life, making it suitable for mass production.

[0052] The driving ratchet assembly 46 and the driven ratchet assembly 47 are respectively disposed in the noise-reducing filling cylinder 41 and the dynamic lifting platform 43, and the driving ratchet assembly 46 and the driven ratchet assembly 47 are in contact with each other. It should be noted that the driving ratchet assembly 46 is fixed inside the noise-reducing filling cylinder 41, and the driven ratchet assembly 47 rotates with the dynamic lifting platform 43. Whenever the tooth profiles of the two engage, the driven ratchet assembly 47 will receive a tangential force, overcoming the preload of the strong spring, and pushing the dynamic lifting platform 43 to slide down one tooth pitch along the keyway of the hollow rotating shaft 42. As the hollow rotating shaft 42 rotates continuously, this process occurs periodically, thereby causing the compound tool grinding head 44 to spirally descend along the inner surface of the tubular support arm, achieving uniform treatment of the entire lower end of the tubular support arm. Whenever the dynamic lifting platform 43 rotates to a specific angle, the ratchet engages, pushing it down one tooth pitch (e.g., 0.5-2mm). Subsequently, under the action of a strong spring, the driven ratchet assembly 47 disengages from the driving ratchet assembly 46 until it re-engages in the next rotation. This intermittent spiral descent helps ensure that the compound tool grinding head 44 covers the entire inner wall, and the descent speed can be precisely controlled by adjusting the ratchet pitch and the rotational speed of the hollow shaft 42.

[0053] The water supply pipe 48 is movably connected to the hollow rotating shaft 42 and the dynamic lifting platform 43, and the dynamic lifting platform 43 is provided with water injection micro-holes 49.

[0054] Evaporation micropores 410 are formed in the side wall of the noise reduction filling cylinder 41.

[0055] Comparison Projects PEO coating followed by direct laser welding After PEO coating, the material undergoes pretreatment in the stirring and consumption process section 4 before welding. Advanced features Welded joint strength Approximately 65-80% of the substrate. Reaching 95-110% of the substrate Strength significantly recovered and may become super strong Weld porosity High (>3%) Extremely low (<0.5%) Defect rate reduced by an order of magnitude ceramic phase distribution The weld edges are enriched and appear as continuous bands. Uniformly and diffusely distributed in the weld Achieving true ceramic particle strengthening Softening of the heat-affected zone (HAZ) obvious Slight (preheating reduces welding heat input) The joint has better overall mechanical properties. Welding spatter serious Very few Improve welding process stability and surface quality It is evident that the stirring and consumption treatment unit 4, through mechanical crushing and controllable preheating, transforms the complete and continuous brittle ceramic oxide layer into dispersed reinforcing particles, and optimizes the thermal state of the tubular support substrate before welding. This is an indispensable key pretreatment step for achieving high-strength metal-ceramic metallurgical bonding, thereby changing the current situation where PEO coatings are difficult to directly weld with high quality.

[0056] It should be noted that the specific models and specifications of the intelligent controller 344, electromagnetic ring array 345, temperature sensor 346, and conductive connector 35 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated here.

[0057] The functional principle of this invention can be explained through the following operational methods: First, a tubular support arm is placed longitudinally at the loading position. The middle part of the tubular support arm is initially clamped by the limiting clamp 252. Then, the upper end of the tubular support arm is supported from the inside out by the expanding support plate 263. At the same time, the inflated heat-resistant capsule 266 is fitted onto the upper end of the tubular support arm. Specifically, the drive slider 251 is controlled to move vertically upward, and the first connecting rod 253 drives the two limiting clamps 252 to move towards each other to initially clamp the middle part of the tubular support arm. Then, the drive mountain-shaped bracket 262 is moved vertically downward, and the second connecting rod 264 drives the expanding support plate 263 to open until it is fixedly in contact with the inner wall of the upper end of the tubular support arm. The downward-moving drive mountain-shaped bracket 262 compresses air through the pressurizing piston 268, causing the heat-resistant capsule 266 to inflate and expand to be fixedly fitted onto the upper end of the tubular support arm.

[0058] Next, the lower end of the tubular support arm is placed in the electrolytic cell 331 using the limiting part 2. The tubular support arm is connected to the electrode through the conductive connector 35, and the plasma power supply 32 is started. Plasma electrolytic oxidation is performed on the lower end of the tubular support arm for 1-5 minutes to generate a ceramic oxide film with a thickness of 5-20 μm. If the film thickness is too thin (<5 μm), the wear and corrosion resistance will be insufficient; if it is too thick (>20 μm), the internal stress of the film layer will increase, which will easily lead to a decrease in the bonding force with the substrate or large pieces of peeling off during subsequent stirring. Time is positively correlated with film thickness, but it is affected by current density and electrolyte composition. The target film thickness can be obtained by adjusting the time within this range according to the power supply output current density (usually 5-20 A / dm²). During this process, the temperature of the weakly alkaline electrolyte is controlled at 20-40℃ by the electrolyte cooling circuit 33. Specifically, the low-temperature weak alkaline electrolyte in the upper layer of the sealed processor 31 enters the tank 3311 through the inlet 3312. After plasma electrolytic oxidation of the lower end of the tubular support arm located in the tank 3311 for 1-5 minutes, the high-temperature weak alkaline electrolyte is discharged through the outlet 3313. The low-temperature aqueous ferromagnetic fluid passes through the heat conduction column group 333 and the high-temperature weak alkaline electrolyte, so that the heat of the high-temperature weak alkaline electrolyte is conducted to the aqueous ferromagnetic fluid.

[0059] Secondly, the aqueous ferrofluid flows in the electrolyte cooling circuit 33 and sequentially passes through the first return straight pipe 341, the near-circular pipe 342, and the second return straight pipe 343. When the temperature sensor 346 detects a hot spot on the wall of the near-circular pipe 342, the intelligent controller 344 instantly energizes one of the electromagnetic rings 3452 at the hot spot and another electromagnetic ring 3452 upstream of it, and labels them as electromagnetic ring E1 and electromagnetic ring E0, respectively. The strong gradient magnetic field generated between electromagnetic rings E1 and E0 rapidly adsorbs and locks in the ferrofluid nanoparticles flowing through this section of water. In the hot spot area on the inner wall of the near-circular pipe 342, a dynamic, high thermal conductivity magnetic fluid coating or agglomerate is formed. The thermal conductivity of the magnetic fluid itself is much higher than that of water. The coating becomes an efficient thermal bridge from the pipe wall to the water body to reduce thermal resistance. The adsorbed magnetic fluid agglomerate destroys the original laminar boundary layer, causing the mainstream cold water flowing through this area to mix violently with the pipe wall, and the heat exchange efficiency is increased by orders of magnitude. At the same time, the flow guide ring 3451 structure further amplifies this turbulence effect. A small amount of magnetic fluid that is not adsorbed continues to flow downstream and enters the next electromagnetic ring 3452 control area waiting to be triggered.

[0060] In some embodiments, the aqueous ferrofluid is preferably a water-based Fe3O4 nanofluid. The magnetic particles have an average particle size ≤10nm, a volume fraction of 5-10%, and sodium oleate as the surfactant, exhibiting high saturation magnetization, excellent thermal stability, and dispersion stability. Alternatively, an ester-based ferrofluid may be used, with synthetic esters such as diisooctyl sebacate as the base fluid, suitable for closed-loop cooling systems sensitive to moisture or requiring higher operating temperatures (>120°C).

[0061] Then, the tubular support arm, after being treated by the ceramic pretreatment section 3, is transferred to the noise reduction filling cylinder 41 of the stirring consumption treatment section 4. The tubular support arm is driven to rotate clockwise by the load-bearing rotating shaft 23, and then the hollow rotating shaft 42 is driven to rotate counterclockwise by the driven gear 45 and water is supplied by the water supply pipe 48. The hollow rotating shaft 42 drives the dynamic lifting platform 43 to rotate synchronously. Due to the intermittent pressure applied by the driven ratchet group 46 to the driven ratchet group 47, the dynamic lifting platform 43 drives the composite tool grinding head 44 to move spirally up and down in the lower end of the tubular support arm. At the same time, the polishing grit makes dynamic contact with the lower end of the tubular support arm, so that the lower end of the tubular support arm is locally preheated to 150-250°C. During this process, low temperature water is sprayed out from the water injection microhole 49 to cool down the polishing grit and the lower end of the tubular support arm. The water vapor that has absorbed heat and evaporated is discharged from the evaporation microhole 410. For commonly used support materials such as aluminum alloys, this temperature range is above their recrystallization temperature, which helps soften the matrix and release stress; however, it is far below their solidus, preventing premature melting or excessive grain growth. This preheating effect is mainly controlled by frictional heating and is regulated in a closed loop through the injection of water through micro-orifices 49 (the water flow rate can be controlled via infrared thermometry feedback) to ensure that the temperature remains stable within the target range. Preheating significantly reduces the heat input required for subsequent laser welding, which is key to reducing softening in the heat-affected zone and welding deformation.

[0062] After undergoing agitation and consumption treatment, the lower inner surface of the tubular support arm has formed a composite structure consisting of broken ceramic particles, plastically deformed matrix metal, and micropores. This structure has a larger specific surface area and higher activity, making it easier for the molten metal to wet and encapsulate the ceramic particles during subsequent laser welding, thus promoting metallurgical bonding.

[0063] It should be noted that after the limiting part 2 moves the support arm out of the mixing and consumption treatment part 4, it can drive the load-bearing rotating shaft 23 to rotate at high speed for several seconds, using centrifugal force to remove residual sand and water droplets, ensuring that the tubular support arm enters the welding station in a clean state.

[0064] Finally, the lower end of the tubular support arm is moved to the right end of the machine base 1 of the corresponding laser welder using the limiting part 2. During the welding process, the sheared and broken ceramic oxide film is fully mixed and dispersed with the plastically flowing matrix material to form a metallurgical bond. The tubular support arm is moved left and right by the moving slider 21, and the tubular support arm is adjusted vertically by the lifting bracket 22.

[0065] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automated support arm processing device for computer external displays, comprising a machine base (1) for conveying tubular support arms from left to right, wherein a loading station and a laser welder are respectively provided at the left and right ends of the machine base (1), characterized in that, Also includes: Limiting part (2), the limiting part (2) is movably disposed at the rear side of the machine (1), and the limiting part (2) includes a multi-directional movable load-bearing rotating shaft (23), on which a support (25) and a locking device (26) for longitudinally fixing the tubular support arm in a two-point manner are provided. The ceramic pretreatment unit (3) is located near the loading position and includes a sealed processor (31), a plasma power supply (32), an electrolyte cooling circuit (33), a secondary cooler (34) and a conductive connector (35). The sealed processor (31) is filled with a weak alkaline electrolyte containing silicates and / or phosphates. The limiting part (2) immerses the lower end of the tubular support arm in the energized weak alkaline electrolyte to generate a porous, high-hardness ceramic oxide film. The stirring consumption treatment unit (4) is located near the laser welder and includes a noise reduction filling cylinder (41), a hollow rotating shaft (42), a dynamic lifting platform (43), and a composite tool grinding head (44). The noise reduction filling cylinder (41) is filled with polishing gravel. The dynamic lifting platform (43) supports the polishing gravel, the composite tool grinding head (44), and the load-bearing rotating shaft (23) to rotate in opposite directions so that the ceramic oxide film on the lower end of the tubular support arm is broken and dispersed. The laser welder performs laser welding on the lower end of the tubular support arm after dual treatment by the ceramic pretreatment section (3) and the stirring consumption treatment section (4), so that the ceramic oxide film and the plastic flow matrix material are mixed and dispersed to form a metallurgical bond.

2. The automated support arm processing device for a computer external monitor according to claim 1, characterized in that, The limiting part (2) includes a movable slider (21) that is slidably installed on the rear side of the machine (1) and moves back and forth in a straight line along the left and right direction. A lifting bracket (22) that moves vertically back and forth is slidably installed in the movable slider (21). The load-bearing rotating shaft (23) is rotatably installed on the lifting bracket (22).

3. The automated support arm processing device for a computer external monitor according to claim 2, characterized in that, The support (25) includes two limiting clamps (252) at the middle of the corresponding tubular support arms, and the two limiting clamps (252) move towards each other to fix the middle of the tubular support arms.

4. The automated support arm processing device for a computer external monitor according to claim 3, characterized in that, The locking device (26) includes a plurality of outwardly expanding support plates (263) extending into the upper end of the tubular support arm. The plurality of outwardly expanding support plates (263) expand in opposite directions to support the upper end of the tubular support arm from the inside out. The locking device (26) also includes a sealing cover (265), in which a heat-resistant capsule (266) is embedded by being filled with gas to fit the upper end of the tubular support arm.

5. The automated support arm processing device for a computer external monitor according to claim 4, characterized in that, The electrolyte cooling circuit (33) is used to dissipate heat from the weakly alkaline electrolyte. The electrolyte cooling circuit (33) consists of an electrolytic cell (331), a coolant condenser (332), a heat conduction column assembly (333), and a recovery pipe assembly (334). The electrolyte cooling circuit (33) is filled with an aqueous ferromagnetic fluid, and the heat conduction column assembly (333) is immersed in the weakly alkaline electrolyte.

6. The automated support arm processing device for a computer external monitor according to claim 5, characterized in that, The recovery pipe assembly (334) has a two-section structure. The secondary cooler (34) is used to dissipate heat from the electrolyte cooling circuit (33). The secondary cooler (34) includes a first return straight pipe (341), a near-circular pipe (342), and a second return straight pipe (343) integrally connected to the recovery pipe assembly (334). The first return straight pipe (341) is connected to the outlet end of the heat conduction column assembly (333) through one section of the recovery pipe assembly (334). The second return straight pipe (343) is connected to the inlet end of the coolant condenser (332) through the other section of the recovery pipe assembly (334). The sealed processor (31) is equipped with an intelligent controller (344). An electromagnetic ring array (345) and a temperature sensor (346) are equidistantly distributed on the near-circular pipe (342).

7. The automated support arm processing device for a computer external monitor according to claim 6, characterized in that, The first return straight pipe (341), the near-circular annular pipe (342) and the second return straight pipe (343) are non-magnetic pipes.

8. The automated support arm processing device for a computer external monitor according to claim 7, characterized in that, The electromagnetic ring array (345) consists of multiple sets of guide rings (3451) and electromagnetic rings (3452). Each guide ring (3451) is located between two electromagnetic rings (3452), and the electromagnetic rings (3452) in each set of electromagnetic ring arrays (345) are independently electrically connected to the intelligent controller (344).

9. The automated support arm processing device for a computer external monitor according to claim 8, characterized in that, The dynamic lifting platform (43) is slidably mounted on the hollow rotating shaft (42). The noise reduction filling cylinder (41) and the dynamic lifting platform (43) are respectively provided with a driving ratchet group (46) and a driven ratchet group (47) that move in contact. The dynamic lifting platform (43) is fixedly connected to a water supply pipe (48).

10. A processing method based on the automated support arm processing device for a computer external display as described in claim 9, characterized in that, The processing method includes the following steps: Step S1: Place the tubular support arm longitudinally at the feeding position, use the limiting clamp (252) to initially clamp the middle part of the tubular support arm, and then use the outward expansion support plate (263) to support the upper end of the tubular support arm from the inside to the outside. At the same time, use the filled heat-resistant capsule (266) to fit the upper end of the tubular support arm. Step S2: Using the limiting part (2), the lower end of the tubular support arm is placed in the electrolytic cell (331). The tubular support arm is connected to the electrode through the conductive connector (35). The plasma power supply (32) is started. Plasma electrolytic oxidation is performed at the lower end of the tubular support arm for 1-5 minutes to generate a ceramic oxide film with a thickness of 5-20 μm. During this process, the temperature of the weak alkaline electrolyte is controlled at 20-40℃ through the electrolyte cooling circuit (33). In step S3, the aqueous ferrofluid flows through the electrolyte cooling circuit (33) and passes sequentially through the first return straight pipe (341), the near-circular pipe (342), and the second return straight pipe (343). When the temperature sensor (346) detects a hot spot on the wall of the near-circular pipe (342), the intelligent controller (344) instantly energizes one of the electromagnetic rings (3452) at the hot spot and another electromagnetic ring (3452) upstream of it, and marks them as electromagnetic ring E1 and electromagnetic ring E0, respectively. The strong gradient magnetic field generated between electromagnetic rings E1 and E0 will cause the magnetic fluid nanoparticles flowing through this section of water to be energized. The magnetic fluid is quickly adsorbed and locked in the hot spot area of ​​the inner wall of the near-circular tube (342), forming a dynamic, high thermal conductivity magnetic liquid coating or agglomerate. The thermal conductivity of the magnetic fluid itself is much higher than that of water. The coating becomes an efficient thermal bridge from the tube wall to the water body to reduce thermal resistance. The adsorbed magnetic fluid agglomerate destroys the original laminar boundary layer, causing the mainstream cold water flowing through this area to mix violently with the tube wall, and the heat exchange efficiency is increased by orders of magnitude. At the same time, the flow guide ring (3451) structure further amplifies this turbulence effect. The small amount of magnetic fluid that is not adsorbed continues to flow downstream and enters the control area of ​​the next electromagnetic ring (3452) waiting to be triggered. Step S4: The tubular support arm after being treated by the ceramic pretreatment section (3) is transferred to the noise reduction filling cylinder (41) of the stirring consumption treatment section (4). The tubular support arm is driven to rotate clockwise by the load-bearing rotating shaft (23), and the hollow rotating shaft (42) is driven to rotate counterclockwise and supply water to the water supply pipe (48). The hollow rotating shaft (42) drives the dynamic lifting platform (43) to rotate synchronously. Because the driven ratchet group (47) is intermittently pressured by the driving ratchet group (46), the dynamic lifting platform (43) drives the composite tool grinding head (44) to move spirally up and down in the lower end of the tubular support arm. At the same time, the polishing grit is used to make dynamic contact with the lower end of the tubular support arm, so that the lower end of the tubular support arm is locally preheated to 150-250°C. In step S5, the lower end of the tubular support arm is moved to the right end of the corresponding laser welder's machine base (1) using the limiting part (2). During the welding process, the sheared and broken ceramic oxide film is fully mixed and dispersed with the plastically flowing matrix material to form a metallurgical bond.

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