A special flying bar rotary jig device for electroless nickel plating

Abstract

The present application relates to the field of surface treatment chemical nickel plating special equipment, and disclose a kind of chemical nickel plating special fly bar rotary jig device, including fly bar main frame, further including rotary disc support structure, rotary disc support structure is set on vertical fly bar frame and located vertical fly bar frame far from the side of horizontal fly bar frame, transmission wheel mechanism is set on fly bar main frame, transmission wheel mechanism includes upper transmission wheel assembly and lower transmission wheel assembly, multiple groups of hanger clamping structure are set on rotary disc support structure, each group of hanger clamping structure includes hanger plate and multiple groups of inner and outer clamping structure, by rotary disc support structure drive hanger clamping structure and the workpiece fixed thereon continuously rotate in plating solution, make the hydrogen bubble attached to the surface of workpiece and hole inner wall continuously separate under the action of centrifugal force and be carried away by flowing plating solution, effectively eliminate the chemical reaction dead zone that small aperture through hole and deep blind hole inside cannot be touched by plating solution due to bubble stagnation under traditional swing mode.

Description

Technical Field

[0001] This invention relates to the field of equipment for surface treatment chemical nickel plating, specifically a flybar rotary fixture device for chemical nickel plating. Background Technology

[0002] Electroless nickel plating is a surface treatment process that uses a reducing agent to reduce nickel ions in the plating bath and deposit them onto the surface of the workpiece to form a coating without the application of an external current. It is widely used in surface protection and functional treatment in aerospace, electronic components, automotive parts and other fields. In the electroless nickel plating process, the workpiece is usually suspended in the plating tank by a flybar (suspension beam), and the flybar's swing mechanism drives the workpiece to reciprocate up and down and left and right in the bath to agitate the plating bath and promote contact between the bath and the workpiece surface. For workpieces with simple structure and flat surface, this swinging method can basically meet the coating quality requirements.

[0003] However, for complex workpieces with densely packed small-diameter through holes or deep blind holes on their surfaces, such as hydraulic valve bodies, precision molds, and porous heat dissipation devices, hydrogen bubbles are continuously released on the workpiece surface and inside the holes during the electroless nickel plating reaction. If these bubbles cannot be detached in time, they will form air pockets or plugs on the inner walls of the holes, preventing the plating solution from entering the depths of the holes and contacting the workpiece surface. This results in the inability of effective chemical deposition reactions to occur in this area, ultimately leading to defects such as pinholes, incomplete plating, or loose plating layers on the inner walls of the holes. Traditional up-and-down and left-and-right swaying methods are low-frequency, large-amplitude movements with limited bubble detachment force acting on the inside of the holes. It is difficult to effectively remove bubbles from the bottom of deep blind holes or the inner walls of small-diameter through holes. Especially when the ratio of hole diameter to depth reaches a certain critical value, the bubbles are firmly attached to the hole wall due to surface tension, and it is almost impossible to remove them by simply swaying the plating solution. The plating layer on the inner wall of the workpiece holes is incomplete or lacks adhesion. In subsequent use, this area becomes a preferential corrosion initiation point, seriously affecting the service life and reliability of the product. To address this, we propose a flybar rotary fixture device specifically for electroless nickel plating. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a flybar rotary fixture device specifically for chemical nickel plating, which solves the aforementioned problems.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a rotary jig device for electroless nickel plating, comprising a main frame of the flybar, which is composed of a horizontal flybar frame and a vertical flybar frame, wherein the bottom of the horizontal flybar frame is fixedly connected to the vertical flybar frame, and further comprising: A rotating disk support structure is provided on the vertical flybar frame and located on the side of the vertical flybar frame away from the horizontal flybar frame. The rotating disk support structure rotates on the vertical flybar frame. The transmission wheel mechanism is mounted on the main frame of the flybar. The transmission wheel mechanism includes an upper transmission wheel assembly and a lower transmission wheel assembly. The lower transmission wheel assembly is connected to the rotating disk support structure. The upper transmission wheel assembly drives the lower transmission wheel assembly to rotate, thereby driving the rotating disk support structure to rotate. The hanging bracket clamping structure consists of multiple sets of hanging bracket clamping structures mounted on the rotating disk support structure. Each set of hanging bracket clamping structures includes a hanging bracket plate and multiple sets of inner and outer clamping structures. The inner and outer clamping structures are used to fix the electroplated parts. The hanging bracket clamping structures rotate with the rotating disk support structure.

[0006] Preferably, the rotating disk support structure includes a turntable, support rods, and support rings. Multiple support rods evenly distributed along the circumference are fixedly connected to one side of the turntable, and the other end of the support rods is away from the turntable. A support ring is fixedly connected to the end of the multiple support rods away from the turntable.

[0007] Preferably, the upper drive wheel assembly includes a second support side plate, a drive shaft, a drive sprocket, a coupling, a motor, and a reducer. Two second support side plates are fixedly connected to one end of the vertical flybar frame near the horizontal flybar frame. The drive shaft passes through the two second support side plates and is rotatably connected to the second support side plates via bearings. The two ends of the drive shaft face the front and rear of the vertical flybar frame, respectively. A drive sprocket is fixedly connected to the drive shaft and is located between the two second support side plates. A coupling is fixedly connected to one end of the drive shaft. The motor and reducer are mounted on the horizontal flybar frame. The output shaft of the motor is fixedly connected to the input end of the reducer, and the output shaft of the reducer is fixedly connected to the end of the coupling opposite to the drive sprocket.

[0008] Preferably, the lower drive wheel assembly includes a support side plate, a driven shaft, a driven sprocket, and a chain. Two support side plates are fixedly connected to the end of the vertical flybar frame away from the horizontal flybar frame. The driven shaft passes through the two support side plates and is rotatably connected to the support side plates via bearings. The driven shaft is parallel to and corresponds to the drive shaft. A driven sprocket is fixedly connected to the driven shaft and is located between the two support side plates. A chain is sleeved on the driven sprocket and the drive sprocket. One end of the driven shaft is fixedly connected to the end of the turntable away from the support rod.

[0009] Preferably, the rotating disk support structure further includes a vertical fixing plate and a horizontal fixing plate. Two vertical fixing plates are fixedly connected to the side of the support ring away from the turntable. The two vertical fixing plates are respectively close to both sides of the support ring. Two horizontal fixing plates are provided on the side of the vertical fixing plate away from the support ring. The vertical fixing plates and the horizontal fixing plates are spliced ​​together to form a frame structure.

[0010] Preferably, two oblong holes are provided through one side of each of the two horizontal fixing plates, and the two oblong holes are located at both ends of the horizontal fixing plate. Two oblong holes are provided through one side of each of the two vertical fixing plates, and the two oblong holes are located at both ends of the vertical fixing plate. The horizontal fixing plates and the vertical fixing plates are connected by bolts and nuts inserted into the oblong holes and oblong holes.

[0011] Preferably, one side of the hanging plate has two through-holes II, which are located at both ends of the hanging plate. On the side of the two horizontal fixing plates away from the vertical fixing plate, there are multiple through-holes I distributed equidistantly along a straight line. Multiple hanging plates are respectively set on the side of the horizontal fixing plate away from the vertical fixing plate, and the hanging plates are bolted to the through-holes I on the horizontal fixing plate through the through-holes II.

[0012] Preferably, the inner and outer clamping structure includes a fixed arc plate, a screw, a slider, a limiting protrusion, and a sliding arc plate. The hanging plate is a hollow structure. On the side of the hanging plate away from the horizontal fixed plate, multiple fixed arc plates are fixedly connected at equal intervals along a straight line. On the side of the fixed arc plate close to the hanging plate, multiple threaded holes are opened through it at equal intervals along a straight line. The threaded holes are located on the side of the hanging plate away from the fixed arc plates and correspond one-to-one with the fixed arc plates. A screw is inserted into each threaded hole. Multiple sliders are snapped into the hanging plate. The sliders correspond one-to-one with the screws. A limiting protrusion is fixedly connected to one side of each slider. On the side of the hanging plate away from the horizontal fixed plate, multiple strip-shaped sliding holes are opened through it at equal intervals along a straight line. The strip-shaped sliding holes correspond one-to-one with the fixed arc plates. The end of the limiting protrusion away from the slider passes through the corresponding strip-shaped sliding hole and is slidably connected to the strip-shaped sliding hole. A sliding arc plate is fixedly connected to the end of the limiting protrusion away from the slider. The inner arc surface of the sliding arc plate is opposite to that of the corresponding fixed arc plate.

[0013] Preferably, a circular protrusion is fixedly connected to one end of the screw located inside the bracket plate, and a stepped hole is opened on the side of the slider opposite to the screw. The end with the larger diameter of the stepped hole is located inside the slider, and the circular protrusion is engaged in the corresponding stepped hole and rotatably connected to the stepped hole.

[0014] Preferably, the sides of the mounting plate are provided with multiple evenly distributed liquid outlets.

[0015] Compared with the prior art, the advantages of the present invention are as follows: A rotary jig device for electroless nickel plating is provided, which has the following advantages: This invention utilizes a rotating disk support structure to continuously rotate the hanging clamp structure and the workpiece fixed thereon in the plating solution. This causes hydrogen bubbles adhering to the workpiece surface and the inner walls of the holes to continuously detach under centrifugal force and be carried away by the flowing plating solution. This effectively eliminates the chemical reaction dead zones that the plating solution cannot reach in small-diameter through holes and deep blind holes due to bubble retention, which are common in traditional oscillating methods. This ensures that the plating solution maintains full contact with all areas of the hole inner wall and that a uniform chemical deposition reaction occurs. As a result, a continuous, dense, and leak-free electroless nickel plating layer is formed on the inner walls of small-diameter and deep blind holes, improving the integrity and bonding reliability of the plating layer on the inner walls of holes in complex workpieces. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 A magnified view of part A in the diagram; Figure 3 This is a cross-sectional schematic diagram of the transmission wheel mechanism of the present invention; Figure 4 for Figure 3 A magnified view of section B in the diagram; Figure 5 for Figure 3 A magnified view of part C in the diagram; Figure 6 This is a cross-sectional schematic diagram of the rotating disk support structure of the present invention; Figure 7 for Figure 6 A magnified view of part D in the diagram; Figure 8 This is a cross-sectional schematic diagram of the hanging bracket clamping structure of the present invention; Figure 9 for Figure 8 A magnified view of part E in the diagram.

[0017] In the diagram: 1. Horizontal flybar frame; 2. Motor; 3. Reducer; 4. Vertical flybar frame; 5. Support ring; 6. Support rod; 7. Horizontal fixed plate; 8. Hanging plate; 9. Support side plate one; 10. Turntable; 11. Liquid outlet; 12. Fixed arc plate; 13. Screw; 14. Sliding arc plate; 15. Strip-shaped sliding hole; 16. Drive shaft; 17. Drive sprocket; 18. Coupling; 19. Chain; 20. Driven shaft; 21. Driven sprocket; 22. Threaded hole; 23. Limiting protrusion; 24. Slider; 25. Stepped hole; 26. Circular protrusion; 27. Waist-shaped hole one; 28. Waist-shaped hole two; 29. ​​Vertical fixed plate; 30. Waist-shaped hole three; 31. Waist-shaped hole four; 32. Support side plate two. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1-9 This invention provides a technical solution: a special flying bar rotary fixture device for electroless nickel plating, comprising a flying bar main frame, which is composed of a horizontal flying bar frame 1 and a vertical flying bar frame 4. The bottom of the horizontal flying bar frame 1 is fixedly connected to the vertical flying bar frame 4. The horizontal flying bar frame 1 is a horizontally arranged rectangular frame structure, integrally formed by welding square steel pipes. The vertical flying bar frame 4 is a vertically arranged rectangular frame structure, with its top fixedly connected to the bottom of the horizontal flying bar frame 1. The longitudinal height of the vertical flying bar frame 4 is determined according to the depth of the electroless nickel plating tank, and is used to suspend the rotating disk support structure and the hanging bracket clamping structure to a predetermined depth in the plating tank. The horizontal flying bar frame 1 and the vertical flying bar frame 4 together form a portal-shaped rigid hanger structure. The device also includes: The rotating disk support structure is set on the vertical flybar frame 4 and located on the side of the vertical flybar frame 4 away from the horizontal flybar frame 1. The rotating disk support structure rotates on the vertical flybar frame 4. The transmission wheel mechanism is mounted on the main frame of the flybar. The transmission wheel mechanism includes an upper transmission wheel assembly and a lower transmission wheel assembly. The lower transmission wheel assembly is connected to the rotating disk support structure. The upper transmission wheel assembly drives the lower transmission wheel assembly to rotate, thereby driving the rotating disk support structure to rotate. The hanging bracket clamping structure consists of multiple sets of hanging bracket clamping structures mounted on the rotating disk support structure. Each set of hanging bracket clamping structures includes a hanging bracket plate 8 and multiple sets of inner and outer clamping structures. The inner and outer clamping structures are used to fix the electroplated parts. The hanging bracket clamping structures rotate with the rotating disk support structure.

[0020] Furthermore, the rotating disk support structure includes a turntable 10, support rods 6, and support rings 5. Multiple support rods 6, evenly distributed along the circumference, are fixedly connected to one side of the turntable 10. The turntable 10 is a circular plate-shaped component, and the support rods 6 are long, round rods evenly distributed at equal angles along the circumference of the turntable 10. One end of each support rod 6 is welded and fixed to the edge area of ​​the turntable 10, and the other end extends outward along the horizontal radial direction. Multiple support rods 6 form a radial support skeleton. The other end of the support rods 6 is away from the turntable 10. A support ring 5 is fixedly connected to the end of the multiple support rods 6 away from the turntable 10. The support ring 5 is a circular frame structure, and its inner ring is fixedly connected to the end of each support rod 6. The setting of the support ring 5 greatly improves the overall rigidity of the rotating disk support structure. Under the condition of bearing 1000kg, it can still keep each hanging plate 8 rotating synchronously in the same horizontal plane, avoiding workpiece shaking or collision due to local deflection deformation. At the same time, the spacing between each support rod 6 is maintained, which is conducive to the free flow of plating solution during rotation.

[0021] Furthermore, the upper drive wheel assembly includes a second support plate 32, a drive shaft 16, a drive sprocket 17, a coupling 18, a motor 2, and a reducer 3. Two second support plates 32 are fixedly connected to one end of the vertical flybar frame 4 near the horizontal flybar frame 1. Each second support plate 32 is a vertically arranged rectangular steel plate, and bearing mounting holes are provided on both plates to support the rotation of the drive shaft 16. The drive shaft 16 passes through both second support plates 32 and is connected to the second support plate 32 via bearings. 2. Rotary connection: The drive shaft 16 is a horizontally positioned long shaft, with its two ends facing the front and rear of the vertical flybar frame 4, respectively. A drive sprocket 17 is fixedly connected to the drive shaft 16, located between two support side plates 32, for transmitting the rotational power of the drive shaft 16 to the driven sprocket 21 via the chain 19. A coupling 18 is fixedly connected to one end of the drive shaft 16. The motor 2 and the reducer 3 are mounted on the horizontal flybar frame 1. The output shaft of the motor 2 is connected to the reducer... The input end of reducer 3 is fixedly connected. Motor 2 is a three-phase asynchronous geared motor. Its rated power is selected based on the maximum load of 1000kg and the required speed of 0.5 to 3.0r / min. Reducer 3 is a worm gear reducer or planetary gear reducer. Its reduction ratio is determined according to the output speed requirement. Motor 2 is equipped with a frequency converter. The output end of the frequency converter is electrically connected to the power input end of motor 2. The control end of the frequency converter is electrically connected to the analog output module of the programmable logic controller. The output frequency of the frequency converter is controlled by the analog signal output of the programmable logic controller to realize stepless adjustment of the speed of motor 2. At the same time, the forward rotation, reverse rotation and start / stop commands of the frequency converter are controlled by the digital output module of the programmable logic controller to realize the process program control of forward and reverse rotation switching and intermittent stop. The output shaft of reducer 3 is fixedly connected to the end of coupling 18 away from the drive sprocket 17. Coupling 18 is a rigid coupling or a flexible sleeve pin coupling, used to transmit torque and compensate for the coaxiality error between the two shafts.

[0022] Furthermore, the lower drive wheel assembly includes a support side plate 9, a driven shaft 20, a driven sprocket 21, and a chain 19. Two support side plates 9 are fixedly connected to the end of the vertical flybar frame 4 away from the horizontal flybar frame 1. Each support side plate 9 consists of two vertically arranged rectangular steel plates, their structure corresponding vertically to the support side plate 32. Bearing mounting holes are provided on each of the two support side plates 9 to support the rotation of the driven shaft 20 and bear the axial load transmitted by the rotating disk support structure. The driven shaft 20 passes through both support side plates 9 and is rotatably connected to them via bearings. The driven shaft 20 is a horizontally arranged long shaft, and its axial position is parallel to the drive shaft 16 and located in the same vertical plane to ensure a linear transmission path for the chain 19. Driven shaft 20 is parallel to drive shaft 16. Driven sprocket 21 is fixedly connected to driven shaft 20. Driven sprocket 21 is located between two support side plates 9. The ratio of the number of teeth of driven sprocket 21 to the number of teeth of drive sprocket 17 determines the transmission ratio. A chain 19 is sleeved on driven sprocket 21 and drive sprocket 17. Chain 19 is a roller chain that wraps around drive sprocket 17 and driven sprocket 21. The tension of chain 19 is adjusted by adjusting the center distance between drive sprocket 17 and driven sprocket 21. One end of driven shaft 20 is fixedly connected to the end of turntable 10 away from support rod 6. The other end of driven shaft 20 is fixedly connected to the center of the side of turntable 10 away from support rod 6 via a key connection. When driven shaft 20 rotates, it directly drives turntable 10 to rotate synchronously.

[0023] Furthermore, the rotating disk support structure also includes vertical fixing plates 29 and horizontal fixing plates 7. Two vertical fixing plates 29 are fixedly connected to the side of the support ring 5 away from the turntable 10. The vertical fixing plates 29 are two vertically arranged long strip steel plates. The two vertical fixing plates 29 are close to the two sides of the support ring 5 respectively. Two horizontal fixing plates 7 are provided on the side of the vertical fixing plates 29 away from the support ring 5. The vertical fixing plates 29 and the horizontal fixing plates 7 are spliced ​​to form a frame structure. The horizontal fixing plates 7 are two horizontally arranged long strip steel plates. Their length direction is perpendicular to the length direction of the vertical fixing plates 29. The two ends of the horizontal fixing plates 7 are respectively connected to the two vertical fixing plates 29 by bolts and nuts. This rectangular frame structure is fixed to one side of the support ring 5 and rotates synchronously with the support ring 5. It is used to provide a unified installation reference plane for multiple hanging plates 8, ensuring that each hanging plate 8 is evenly distributed in the circumferential direction and maintains the same horizontal height in the vertical direction, avoiding inconsistent immersion depth of each workpiece in the plating solution due to installation errors.

[0024] Furthermore, two oblong holes 31 are provided through one side of each of the two horizontal fixing plates 7. These two oblong holes 31 are located at both ends of the horizontal fixing plate 7. Each oblong hole 31 is an elongated through-hole on the surface of the horizontal fixing plate 7, extending along its length. These holes are used to allow the connecting bolts to pass through and to allow the bolts to be adjusted horizontally within the holes. Similarly, two oblong holes 30 are provided through one side of each of the two vertical fixing plates 29. These two oblong holes 30 are located at both ends of the vertical fixing plate 29. These oblong holes 30 are elongated through-holes on the surface of the vertical fixing plate 29, extending along its height. These holes are used to allow the connecting bolts to pass through and to allow the bolts to be adjusted vertically within the holes. The horizontal fixing plate 7 and the vertical fixing plate 29 are connected by bolts and nuts inserted into the oblong holes 31 and 30. When the horizontal fixing plate 7 is connected to the vertical fixing plate 29, the oblong hole 31 at the end of the horizontal fixing plate 7 is aligned with the corresponding oblong hole 30 on the vertical fixing plate 29. After inserting the bolts, the nuts are tightened. The oblong hole structure allows the horizontal fixing plate 7 to have a certain installation position adjustment margin in both the horizontal and vertical directions relative to the vertical fixing plate 29. When the support ring 5 is slightly deformed due to welding deformation or long-term use, the installation error can be compensated by the adjustment function of the oblong holes to ensure that the horizontal fixing plate 7 always remains horizontal, thereby ensuring that each workpiece clamped on the hanging plate 8 is at the same depth in the plating solution.

[0025] Furthermore, two oblong holes 28 are formed through one side of the hanging plate 8. The two oblong holes 28 are located at both ends of the hanging plate 8. The oblong holes 28 are elongated through holes formed on the surface of the hanging plate 8, extending along the height direction of the hanging plate 8. They are used to pass through the connecting bolts and allow the hanging plate 8 to be finely adjusted in the vertical direction. On the side of each of the two horizontal fixing plates 7 away from the vertical fixing plate 29, multiple oblong holes 1 27 are formed through and equidistantly distributed along a straight line. The oblong holes 1 27 are elongated through holes formed on the surface of the horizontal fixing plate 7, extending along the length direction of the horizontal fixing plate 7. The multiple oblong holes 1 27 are arranged in a row equidistantly along the length direction of the horizontal fixing plate 7. The spacing between two adjacent oblong holes 1 27 is set according to the workpiece size and the width of the hanging plate 8. Multiple hanging plates 8 are respectively set on the horizontal fixing plates 7 away from the vertical fixing plate 29. On one side, the hanging plate 8 is bolted to the oblong hole 27 on the horizontal fixing plate 7 through the second oblong hole 28. When installing the hanging plate 8, align the second oblong hole 28 at its upper end with one of the oblong holes 27 on the horizontal fixing plate 7, and align the second oblong hole 28 at its lower end with the corresponding oblong hole 27 on the other horizontal fixing plate 7. After inserting the bolt, tighten the nut. There are multiple oblong holes 27 on the horizontal fixing plate 7, which allows the operator to flexibly select the installation position of the hanging plate 8 and the spacing between adjacent hanging plates 8 according to the width and quantity of the workpiece to be plated. At the same time, the second oblong hole 28 allows the hanging plate 8 to be finely adjusted in the vertical direction to ensure that the upper and lower ends of the hanging plate 8 are reliably connected to the two horizontal fixing plates 7 respectively, and to avoid one side being suspended or tilted due to the length error of the hanging plate 8. The spacing between adjacent hanging plates 8 should ensure that the workpieces do not interfere with each other during rotation.

[0026] Furthermore, the inner and outer clamping structure includes a fixed arc plate 12, a screw 13, a slider 24, a limiting protrusion 23, and a sliding arc plate 14. The bracket plate 8 is a hollow structure, a hollow rectangular tubular structure, with an internal cavity to accommodate the sliding of the slider 24. Multiple fixed arc plates 12, evenly distributed along a straight line, are fixedly connected to the side of the bracket plate 8 facing away from the horizontal fixed plate 7. The side of the fixed arc plate 12 closest to the bracket plate 8 is a block-shaped component with an arc-shaped concave surface. One end of the fixed arc plate 12 is welded and fixed to the outer wall of the bracket plate 8, with the arc-shaped concave surface facing the sliding arc plate 14. Multiple threaded holes 22, evenly distributed along a straight line, are provided through one side of the bracket plate 8. 2 is located on the side of the hanging plate 8 away from the fixed arc plate 12 and corresponds one-to-one with the fixed arc plate 12. The internal thread of the threaded hole 22 matches the external thread of the screw 13. Each threaded hole 22 is inserted with a screw 13. Multiple sliders 24 are snapped into the hanging plate 8. Each slider 24 corresponds one-to-one with a screw 13. The slider 24 is a rectangular block component that is snapped into the internal cavity of the hanging plate 8 and can slide back and forth along the width of the hanging plate 8. Each side of the slider 24 is fixedly connected with a limiting protrusion 23. The limiting protrusion 23 is a raised structure with a rectangular cross section. Its cross section size matches the width of the strip-shaped sliding hole 15. When the limiting protrusion 23 slides along the strip-shaped sliding hole 15, it is limited by the hole wall and can only slide along the length of the strip-shaped sliding hole 15. The direction is linear reciprocating motion, unable to rotate, thus converting the rotational motion of the screw 13 into linear sliding of the slider 24 and the limiting protrusion 23. Multiple strip-shaped sliding holes 15 are equidistantly distributed along a straight line on the side of the hanging plate 8 opposite to the horizontal fixed plate 7. Each strip-shaped sliding hole 15 corresponds one-to-one with the fixed arc plate 12. The strip-shaped sliding hole 15 is a long, through-hole penetrating the outer wall of the hanging plate 8, its length direction consistent with the sliding direction of the slider 24. The width of the strip-shaped sliding hole 15 matches the thickness of the limiting protrusion 23. The end of the limiting protrusion 23 opposite to the slider 24 passes through the corresponding strip-shaped sliding hole 15 and is slidably connected to it. Each end of the limiting protrusion 23 opposite to the slider 24 is fixedly connected to a sliding arc plate. Plate 14, the sliding arc plate 14 and the corresponding fixed arc plate 12 have their inner arc surfaces facing each other. The sliding arc plate 14 is a block-shaped component with an arc-shaped convex surface. Its arc-shaped convex surface is directly opposite the arc-shaped concave surface of the fixed arc plate 12. The two form a clamping space for clamping the workpiece. When the screw 13 is rotated, the screw 13 is screwed in or out of the threaded hole 22. The circular protrusion 26 pushes or pulls the slider 24 to slide. The slider 24 drives the sliding arc plate 14 to move closer to or away from the fixed arc plate 12 through the limiting protrusion 23, thereby clamping or releasing the workpiece. This clamping structure maintains a constant clamping force after clamping through the self-locking characteristic of the thread, without the need to continuously apply external force, effectively preventing the clamping from loosening due to vibration during rotation.

[0027] Furthermore, a circular protrusion 26 is fixedly connected to one end of the screw 13 located inside the bracket plate 8. The circular protrusion 26 is a cylindrical boss with a diameter larger than the outer diameter of the screw 13. It is coaxially arranged with the screw 13 and integrally formed and fixed to the end of the screw 13 that extends into the inner cavity of the bracket plate 8. The outer circumferential surface of the circular protrusion 26 is a smooth cylindrical surface, and its axial thickness is smaller than the end with the larger diameter of the stepped hole 25. A stepped hole 25 is opened on the side of the slider 24 opposite to the screw 13. The end with the larger diameter of the stepped hole 25 is located inside the slider 24. The stepped hole 25 is a stepped hole that penetrates one side wall of the slider 24. It is formed by the coaxial connection of the end with the larger diameter and the end with the smaller diameter. The end with the larger diameter is located on the side of the slider 24 facing the screw 13. The end with the smaller diameter penetrates the side wall of the slider 24, but its diameter is smaller than the outer diameter of the circular protrusion 26. The circular protrusion 26 is inserted into the corresponding stepped hole 25 and rotatably connected to it. After being inserted from the end with the larger diameter of the stepped hole 25, it is limited by the end with the smaller diameter and cannot be dislodged, thus axially constraining the circular protrusion 26 within the stepped hole 25. The outer circumferential surface of the circular protrusion 26 and the large-diameter hole wall of the stepped hole 25 are in clearance fit, allowing the circular protrusion 26 to rotate freely within the stepped hole 25. This connection structure allows the circular protrusion 26 to rotate synchronously within the stepped hole 25 when the screw 13 rotates, but the slider 24 does not rotate with the screw 13. It only converts the rotational motion of the screw 13 into linear motion. At the same time, the axial limiting function of the stepped hole 25 allows the circular protrusion 26 to reliably push or pull the slider 24 when the screw 13 rotates forward or backward, preventing the slider 24 from disengaging from the screw 13 and ensuring the reliable execution of clamping and releasing actions.

[0028] Furthermore, multiple evenly distributed liquid outlets 11 are provided on the sides of the mounting plate 8. The liquid outlets 11 are through holes penetrating the side walls of the mounting plate 8, connecting the internal cavity of the mounting plate 8 with the external plating solution environment. When the mounting plate 8 is immersed in the electroless nickel plating tank, the plating solution flows freely into the internal cavity of the mounting plate 8 through the liquid outlets 11, keeping the liquid level inside and outside the mounting plate 8 consistent. This eliminates the buoyancy generated by the internal closed cavity of the mounting plate 8, preventing the buoyancy from causing additional lifting torque on the mounting structure and ensuring that the mounting plate 8 maintains a stable posture during rotation. At the same time, the opening of the liquid outlets 11 reduces the drainage resistance of the mounting plate 8 when it moves in the plating solution, reducing the power requirement of the motor 2. When the electroless nickel plating reaction is completed and the mounting plate 8 is lifted out of the tank by the crane, the liquid outlets 11 allow the plating solution in the internal cavity of the mounting plate 8 to flow out quickly, preventing the plating solution from being carried out of the tank by the mounting plate 8, thus avoiding waste of the solution and environmental pollution.

[0029] Working Principle: In use, the operator first connects multiple hanging plates 8 to the horizontal fixed plate 7 via oblong holes 27 through oblong holes 28, according to the size and quantity of the workpiece to be plated. Since there are multiple oblong holes 27 evenly distributed along a straight line on the horizontal fixed plate 7, and the hanging plates 8 have oblong holes 28, the operator can adjust the installation position of the hanging plates 8 and the spacing between adjacent hanging plates 8 as needed to accommodate workpieces of different sizes. Simultaneously, the horizontal fixed plate 7 and the vertical fixed plate 29 are connected by bolts through oblong holes 31 and 30. The oblong hole design also allows for fine-tuning of the horizontal fixed plate 7 relative to the vertical fixed plate 29, ensuring the entire hanging assembly is horizontal, thus completing the installation of the hanging plates 8. After installation, the operator places the workpiece to be plated between the fixed arc plate 12 and the sliding arc plate 14. Then, using a tool, the operator rotates the screw 13. The screw 13 rotates within the threaded hole 22, and the circular protrusion 26 at one end rotates freely within the stepped hole 25 on the slider 24. Since the larger end of the stepped hole 25 is located within the slider 24, the circular protrusion 26 is axially confined within the stepped hole 25. When the screw 13 rotates, it drives the slider 24 to slide along the axis of the screw 13 inside the hanger plate 8 through the threaded engagement. The slider 24 drives the limiting protrusion 23 to slide within the strip-shaped sliding hole 15. The limiting protrusion 23 then drives the sliding arc plate 14 to move relative to the fixed arc plate 12. The fixed arc plate 12 is fixedly connected to the outer wall of the hanger plate 8. The sliding arc plate 14 gradually approaches the fixed arc plate 12. The inner arc surface of the arc plate 12 is used to clamp the workpiece between the two. Rotating the screw 13 in the opposite direction will move the sliding arc plate 14 away from the fixed arc plate 12, releasing the workpiece for loading and unloading. The above clamping method is suitable for solid and hollow workpieces with circular, square, or irregular cross-sections. For tubular or cylindrical electroplated parts, this device also supports clamping from the inside out. The operator can insert the fixed arc plate 12 and the sliding arc plate 14 into the inner hole of the tubular workpiece, so that the outer arc surface of the fixed arc plate 12 is in contact with one side of the inner wall of the tube. Then, rotating the screw 13 will drive the sliding arc plate 14 to move away from the fixed arc plate 12 through the slider 24, so that the outer arc surface of the sliding arc plate 14 is pressed against the other side of the inner wall of the tube, thereby clamping the tube wall from the inside out and achieving reliable clamping of the tubular workpiece. Since electroless nickel plating requires the workpiece to rotate in the plating solution, if the workpiece is not effectively clamped, the inertial torque during the start-up, forward / reverse switching, and stopping processes will cause relative sliding or even detachment between the workpiece and the clamping structure, resulting in the workpiece colliding with the tank or bumping into each other. Therefore, regardless of whether external clamping or internal support is used, it is necessary to confirm that the clamping is in place before rotation to ensure that the workpiece and the rotating disk support structure maintain a relatively fixed connection, so as to ensure the smooth transmission of rotation and the consistency of plating quality. After all workpieces are clamped, the overhead crane lifts the entire flybar rotating fixture device and places it into the electroless nickel plating tank. The plating solution flows from the outlet 11 into the internal cavity of the hanging plate 8, making the liquid levels inside and outside the hanging plate 8 consistent and eliminating the influence of buoyancy on the hanging structure.Meanwhile, the design of the outlet 11 also facilitates rapid liquid discharge when the hanging plate 8 is lifted out of the tank, reducing the loss of plating solution carried out. Subsequently, the motor 2 is started. The output torque of the motor 2 is reduced and increased by the reducer 3, and then transmitted to the drive shaft 16 through the coupling 18, driving the drive shaft 16 and the drive sprocket 17 fixed on it to rotate. The drive sprocket 17 transmits power to the driven sprocket 21 through the chain 19. The driven sprocket 21 drives the driven shaft 20 to rotate. One end of the driven shaft 20 is fixedly connected to the turntable 10, thereby driving the entire rotating disk support structure to rotate on the vertical flybar frame 4. In the rotating disk support structure, the turntable 10 is fixedly connected to the support ring 5 through multiple support rods 6 evenly distributed along the circumference. The support ring 5 is fixedly connected to each hanging plate 8 through the vertical fixed plate 29 and the horizontal fixed plate 7. Therefore, the hanging plate 8 and all the workpieces clamped on it rotate synchronously with the turntable 10, in the chemical plating process. During the nickel plating process, the workpiece continuously undergoes uniform circular motion in the plating solution. Hydrogen bubbles adhering to its surface and within its pores are rapidly ejected from the workpiece surface under centrifugal force. The plating solution continuously washes the workpiece surface under centrifugal agitation, accelerating the exchange of plating solution within the pores and ensuring full contact between the plating solution and the workpiece surface for a uniform chemical deposition reaction. Operators can adjust the rotation speed of motor 2 steplessly within the range of 0.5 to 3.0 rpm according to the workpiece's structural complexity and pore size, or set forward, reverse, and intermittent pause processes via the motor controller to adapt to the degassing requirements of different workpieces. After the electroless nickel plating reaction is complete, motor 2 is turned off, and the overhead crane lifts the flybar rotating fixture from the plating tank. The screws 13 are rotated in the reverse direction, and the sliding arc plate 14 releases the workpiece, allowing it to be removed, thus completing the entire electroless nickel plating process.

[0030] 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 variations 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 rotary jig device for electroless nickel plating, comprising a main frame of flybars, the main frame of flybars being composed of a horizontal flybar frame (1) and a vertical flybar frame (4), wherein the bottom of the horizontal flybar frame (1) is fixedly connected to the vertical flybar frame (4), characterized in that, Also includes: A rotating disk support structure is provided on the vertical flybar frame (4) and located on the side of the vertical flybar frame (4) away from the horizontal flybar frame (1). The rotating disk support structure rotates on the vertical flybar frame (4). The transmission wheel mechanism is mounted on the main frame of the flybar. The transmission wheel mechanism includes an upper transmission wheel assembly and a lower transmission wheel assembly. The lower transmission wheel assembly is connected to the rotating disk support structure. The upper transmission wheel assembly drives the lower transmission wheel assembly to rotate, thereby driving the rotating disk support structure to rotate. The hanging bracket clamping structure has multiple sets of hanging bracket clamping structures set on the rotating disk support structure. Each set of hanging bracket clamping structures includes a hanging bracket plate (8) and multiple sets of inner and outer clamping structures. The inner and outer clamping structures are used to fix the electroplated parts. The hanging bracket clamping structures rotate with the rotating disk support structure.

2. The electroless nickel plating flybar rotary fixture device according to claim 1, characterized in that, The rotating disk support structure includes a turntable (10), support rods (6) and support rings (5). Multiple support rods (6) are fixedly connected to one side of the turntable (10) and are evenly distributed around the circumference. The other end of the support rods (6) is away from the turntable (10). A support ring (5) is fixedly connected to one end of the multiple support rods (6) away from the turntable (10).

3. The electroless nickel plating flybar rotary fixture device according to claim 1, characterized in that, The upper drive wheel assembly includes a second support side plate (32), a drive shaft (16), a drive sprocket (17), a coupling (18), a motor (2), and a reducer (3). Two second support side plates (32) are fixedly connected to one end of the vertical flybar frame (4) near the horizontal flybar frame (1). The drive shaft (16) passes through the two second support side plates (32) and is rotatably connected to the second support side plates (32) through bearings. The two ends of the drive shaft (16) face the vertical flybar frame (4) respectively. At the front and rear, a drive sprocket (17) is fixedly connected to the drive shaft (16). The drive sprocket (17) is located between two support side plates (32). A coupling (18) is fixedly connected to one end of the drive shaft (16). The motor (2) and the reducer (3) are mounted on the horizontal flybar frame (1). The output shaft of the motor (2) is fixedly connected to the input end of the reducer (3). The output shaft of the reducer (3) is fixedly connected to the end of the coupling (18) away from the drive sprocket (17).

4. The electroless nickel plating flybar rotary fixture device according to claim 3, characterized in that, The lower drive wheel assembly includes a support side plate (9), a driven shaft (20), a driven sprocket (21), and a chain (19). The vertical flybar frame (4) is fixedly connected to two support side plates (9) at one end away from the horizontal flybar frame (1). The driven shaft (20) passes through the two support side plates (9) and is rotatably connected to the support side plates (9) through bearings. The driven shaft (20) is parallel to the drive shaft (16). The driven sprocket (21) is fixedly connected to the driven shaft (20). The driven sprocket (21) is located between the two support side plates (9). A chain (19) is sleeved on the driven sprocket (21) and the drive sprocket (17). One end of the driven shaft (20) is fixedly connected to the end of the turntable (10) away from the support rod (6).

5. The electroless nickel plating flybar rotary fixture device according to claim 2, characterized in that, The rotating disk support structure also includes a vertical fixing plate (29) and a horizontal fixing plate (7). Two vertical fixing plates (29) are fixedly connected to the side of the support ring (5) away from the turntable (10). The two vertical fixing plates (29) are close to the two sides of the support ring (5). Two horizontal fixing plates (7) are provided on the side of the vertical fixing plate (29) away from the support ring (5). The vertical fixing plates (29) and the horizontal fixing plates (7) are spliced ​​together to form a frame structure.

6. The electroless nickel plating flybar rotary fixture device according to claim 5, characterized in that, Two oblong holes (31) are opened through one side of each of the two horizontal fixing plates (7). The two oblong holes (31) are located at both ends of the horizontal fixing plate (7). Two oblong holes (30) are opened through one side of each of the two vertical fixing plates (29). The two oblong holes (30) are located at both ends of the vertical fixing plate (29). The horizontal fixing plate (7) and the vertical fixing plate (29) are connected by bolts and nuts inserted into the oblong holes (31) and oblong holes (30).

7. The electroless nickel plating flybar rotary fixture device according to claim 6, characterized in that, Two oblong holes (28) are opened through one side of the hanging plate (8). The two oblong holes (28) are located at both ends of the hanging plate (8). Multiple oblong holes (27) are opened through the side of the two horizontal fixing plates (7) away from the vertical fixing plate (29). Multiple hanging plates (8) are respectively set on the side of the horizontal fixing plate (7) away from the vertical fixing plate (29). The hanging plates (8) are bolted to the oblong holes (27) on the horizontal fixing plate (7) through the oblong holes (28).

8. The electroless nickel plating flybar rotary fixture device according to claim 1, characterized in that, The inner and outer clamping structure includes a fixed arc plate (12), a screw (13), a slider (24), a limiting protrusion (23), and a sliding arc plate (14). The bracket plate (8) is a hollow structure. On the side of the bracket plate (8) away from the horizontal fixed plate (7), multiple fixed arc plates (12) are fixedly connected at equal intervals along a straight line. The fixed arc plates (12) are close to the side of the bracket plate (8). Multiple threaded holes (22) are opened through one side of the bracket plate (8) at equal intervals along a straight line. The threaded holes (22) are located on the side of the bracket plate (8) away from the fixed arc plate (12) and correspond one-to-one with the fixed arc plate (12). A screw (13) is inserted into each threaded hole (22). Multiple sliders ( 24) The slider (24) is snapped into the bracket plate (8). The slider (24) corresponds to the screw (13). One side of the slider (24) is fixedly connected to the limiting protrusion (23). The side of the bracket plate (8) away from the horizontal fixing plate (7) is provided with multiple strip-shaped sliding holes (15) distributed equidistantly along a straight line. The strip-shaped sliding holes (15) correspond to the fixed arc plate (12). The end of the limiting protrusion (23) away from the slider (24) passes through the corresponding strip-shaped sliding hole (15) and is slidably connected to the strip-shaped sliding hole (15). The end of the limiting protrusion (23) away from the slider (24) is fixedly connected to the sliding arc plate (14). The sliding arc plate (14) is opposite to the inner arc surface of the corresponding fixed arc plate (12).

9. The electroless nickel plating flybar rotary fixture device according to claim 8, characterized in that, One end of the screw (13) located inside the bracket plate (8) is fixedly connected to a circular protrusion (26). The slider (24) opposite to the screw (13) is provided with a stepped hole (25). The end of the stepped hole (25) with the larger diameter is located inside the slider (24). The circular protrusion (26) is engaged in the corresponding stepped hole (25) and is rotatably connected to the stepped hole (25).

10. The electroless nickel plating flybar rotary fixture device according to claim 1, characterized in that, The side of each hanging plate (8) is provided with multiple evenly distributed liquid outlets (11).

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