Cathode electrophoresis system

Abstract

The invention provides a cathode electrophoresis system which comprises a hanging tool, a moving mechanism and a controller, the moving mechanism comprises a supporting plate, a moving plate, a hanging rod, a horizontal driving mechanism, a vertical driving mechanism and a rotary driving mechanism, the supporting plate extends in the left-right direction, the moving plate is arranged on the supporting plate in a left-right sliding mode, and the hanging rod is arranged on the hanging tool. The horizontal driving mechanism is used for driving the moving plate to slide left and right on the supporting plate; a mounting seat is arranged on the movable plate, the lifting rod is vertically arranged and is in sliding fit with the mounting seat, and the vertical driving mechanism is used for driving the lifting rod to reciprocate in the vertical direction; the rotation driving mechanism is arranged at the lower end of the hanging rod, the hanging tool is used for hanging workpieces and connected with the rotation driving mechanism, and the rotation driving mechanism is used for driving the hanging tool to rotate; the horizontal driving mechanism, the vertical driving mechanism and the rotary driving mechanism are electrically connected with the controller. The electrophoresis quality of the workpiece can be effectively improved, and the draining effect of the workpiece is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of electrophoretic coating of vehicle parts, and in particular relates to a cathode electrophoretic coating system. Background Art

[0002] The cathode electrophoretic system is a coating formation system. It uses a hanger to immerse the conductive workpiece in the electrophoretic tank liquid as a cathode. Anode tubes are set on the front and back sides of the electrophoretic tank. When direct current is passed between the anode tube and the workpiece, a water-insoluble electrophoretic coating film will be precipitated on the surface of the workpiece to achieve electrophoretic coating.

[0003] Since the anode tubes are only distributed on the front and back sides of the electrophoresis tank, the electrophoretic coating on the parts of the workpiece close to the anode tubes, i.e., the front and back sides of the workpiece, is thicker, while the electrophoretic coating on the parts of the workpiece far from the anode tubes, i.e., the left and right sides of the workpiece, is thinner, that is, the thickness of the electrophoretic coating on different parts of the same workpiece is inconsistent, resulting in poor electrophoretic quality of the workpiece. Therefore, how to improve the electrophoretic quality of the workpiece has become a technical problem that technicians in this field need to solve urgently. Summary of the invention

[0004] The object of the present invention is to provide a cathode electrophoresis system to solve the above technical problems in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A cathode electrophoresis system, comprising a hanger, a moving mechanism, and a controller, wherein the moving mechanism comprises a support plate, a moving plate, a suspension rod, a horizontal drive mechanism, a vertical drive mechanism, and a rotation drive mechanism, wherein the support plate extends in the left-right direction, the moving plate is slidably arranged on the support plate, and the horizontal drive mechanism is used to drive the moving plate to slide left-right on the support plate; a mounting seat is provided on the moving plate, the suspension rod is vertically arranged, the suspension rod and the mounting seat are slidably matched, and the vertical drive mechanism is used to drive the suspension rod to reciprocate in the vertical direction; the rotation drive mechanism is arranged at the lower end of the suspension rod, the hanger is used to hang a workpiece, the hanger is connected to the rotation drive mechanism, and the rotation drive mechanism is used to drive the hanger to rotate; the horizontal drive mechanism, the vertical drive mechanism, and the rotation drive mechanism are electrically connected to the controller respectively.

[0007] Preferably, two guide rails are relatively arranged on the upper and lower sides of the front side of the support plate, and both of the guide rails extend in the left and right directions. Two sliders are relatively arranged on the rear side of the movable plate, and the two sliders slide in one-to-one correspondence with the two guide rails.

[0008] Preferably, the horizontal driving mechanism includes a first motor, a first gear and a first rack, the first rack is arranged on the front side of the support plate and is located between the two guide rails, and the first rack is parallel to the guide rails; the first motor is vertically arranged on the front side of the movable plate, and the output shaft of the first motor passes through the movable plate backward and is connected to the middle position of the first gear, and the first gear is meshed with the first rack.

[0009] Preferably, a slide rail is vertically arranged on the right side surface of the suspension rod, and a slide block for slidingly cooperating with the slide rail is arranged on the left side surface of the mounting seat.

[0010] Preferably, the vertical drive mechanism includes a second motor, a second gear and a second rack, the second rack is vertically arranged on the right side surface of the suspension rod, the second motor is vertically arranged on the rear side surface of the movable plate, the output shaft of the second motor passes forward through the movable plate and is connected to the middle position of the second gear, and the second gear is meshed with the second rack.

[0011] Preferably, the rotary drive mechanism includes a third motor and a reducer, the reducer is connected to the lower end of the boom, the third motor is connected to one side of the reducer, the output shaft of the reducer is vertically arranged, and the hanger is connected to the output shaft of the reducer.

[0012] Preferably, the hanger includes a connecting shaft, a support rod and a hook for hanging the workpiece, the upper end of the connecting shaft is coaxially connected to the output shaft of the reducer, and a plurality of support rods are arranged on the left and right sides of the connecting shaft from top to bottom, each of the support rods is perpendicular to the connecting shaft, and each of the support rods is provided with the hook.

[0013] Preferably, the support rods are evenly arranged on the left and right sides of the connecting shaft.

[0014] Preferably, the hook comprises a vertical rod and two limiting rods, the lower end of the vertical rod is vertically connected to the upper side of the support rod, and the two limiting rods are relatively arranged on the left and right sides of the upper part of the vertical rod.

[0015] Preferably, it also includes a visual recognition system, which includes a camera and a video processor. The camera is used to shoot a video of the workpiece within a certain period of time after it is removed from the bath liquid of the electrophoresis tank and rotated to drain. The video processor is used to process and analyze the video to identify the number of water droplets dripping from the workpiece within the certain period of time, and then send it to the controller.

[0016] The beneficial effects of the present invention are:

[0017] The cathode electrophoresis system of the present invention utilizes a horizontal driving mechanism to drive the workpiece to the top of the electrophoresis tank, and then utilizes a vertical driving mechanism to immerse the workpiece in the tank liquid of the electrophoresis tank. During electrophoresis, the workpiece is rotated by a rotary driving mechanism, so that the time that each part of the workpiece is close to the anode tube set in the electrophoresis tank is relatively consistent, so that the thickness of the electrophoretic coating on each part of the workpiece after electrophoresis is relatively consistent, thereby effectively improving the quality of electrophoresis. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments, and further describe the specific embodiments of the present invention in detail in conjunction with the drawings, wherein

[0019] Figure 1 A schematic diagram of a moving mechanism provided by an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of a hanger provided in an embodiment of the present invention.

[0021] Markings in the accompanying drawings:

[0022] 11. Support plate, 12. Guide rail; 21. Moving plate, 22. Mounting seat, 23. Slider,

[0023] 24, sliding block; 31, first motor, 32, first rack; 41, second motor,

[0024] 42, second rack, 43, second gear; 51, suspension rod, 52, slide rail;

[0025] 61. The third motor; 62. The reducer; 63. The coupling; 71. The connecting shaft;

[0026] 72. Support rod, 73. Vertical rod, 74. Limit rod. DETAILED DESCRIPTION

[0027] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0028] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0029] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0030] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0031] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a cathode electrophoresis system, which includes a hanger, a moving mechanism, and a controller. The moving mechanism includes a support plate 11, a moving plate 21, a suspension rod 51, a horizontal drive mechanism, a vertical drive mechanism, and a rotation drive mechanism. The support plate 11 extends in the left-right direction, and the moving plate 21 is slidably arranged on the support plate 11, and the horizontal drive mechanism is used to drive the moving plate 21 to slide left-right on the support plate 11; a mounting seat 22 is arranged on the moving plate 21, the suspension rod 51 is vertically arranged, and the suspension rod 51 is slidably matched with the mounting seat 22, and the vertical drive mechanism is used to drive the suspension rod 51 to reciprocate in the vertical direction; the rotation drive mechanism is arranged at the lower end of the suspension rod 51, the hanger is used to hang a workpiece, the hanger is connected to the rotation drive mechanism, and the rotation drive mechanism is used to drive the hanger to rotate; the horizontal drive mechanism, the vertical drive mechanism and the rotation drive mechanism are electrically connected to the controller respectively.

[0032] The cathode electrophoresis system provided in the embodiment of the present invention utilizes a horizontal drive mechanism to drive the workpiece to the top of the electrophoresis tank, and then utilizes a vertical drive mechanism to immerse the workpiece in the tank liquid of the electrophoresis tank. During electrophoresis, the workpiece is rotated by a rotary drive mechanism, so that the time that various parts of the workpiece are close to the anode tube set in the electrophoresis tank is relatively consistent, so that the thickness of the electrophoretic coating on various parts of the workpiece after electrophoresis is relatively consistent, thereby effectively improving the quality of electrophoresis.

[0033] Furthermore, two guide rails 12 are disposed oppositely on the upper and lower sides of the front side of the support plate 11, and the two guide rails 12 extend in the left-right direction. Two sliders 23 are disposed oppositely on the rear side of the movable plate 21, and the two sliders 23 are slidably matched with the two guide rails 12 in a one-to-one correspondence. With this solution, the sliding setting of the movable plate 21 on the support plate 11 is better realized.

[0034] Specifically, the horizontal driving mechanism includes a first motor 31, a first gear and a first rack 32. The first rack 32 is arranged on the front side of the support plate 11 and between the two guide rails 12. The first rack 32 is parallel to the guide rails 12. The first motor 31 is vertically arranged on the front side of the movable plate 21. The output shaft of the first motor passes through the movable plate backward and is connected to the middle position of the first gear. The first gear is meshed with the first rack. With this solution, the controller controls the rotation of the first motor to drive the first gear to rotate. Then, the meshing between the first gear and the first rack 32 is used to drive the movable plate 21 and the slider to move left and right along the guide rail, thereby driving the hanger and the workpiece suspended on the hanger to move left and right. Then, the workpiece can be driven to different positions in the horizontal direction, so that the workpiece can reach directly above the electrophoresis tank or the next process. It can be understood that the first motor is electrically connected to the controller; to prevent the slider from falling off the guide rail, the guide rail can be an I-shaped structure, and a T-slot is provided on the side of the slider away from the movable plate, and the slider is nested in the guide rail through the T-slot thereon.

[0035] Further, a slide rail 52 is vertically arranged on the right side of the suspension rod 51, and a slide block 24 for slidingly cooperating with the slide rail 52 is arranged on the left side of the mounting seat 22. With this solution, the sliding connection between the suspension rod and the mounting seat is better achieved by utilizing the cooperation between the slide rail and the slide block.

[0036] Specifically, the vertical drive mechanism includes a second motor 41, a second gear 43 and a second rack 42, wherein the second rack 42 is vertically arranged on the right side of the suspension rod 51, the second motor 41 is vertically arranged on the rear side of the movable plate 21, the output shaft of the second motor passes through the movable plate forward and is connected to the middle position of the second gear, and the second gear is meshed with the second rack. With this scheme, the second motor is controlled to rotate by the controller, so that the second gear can be driven to rotate accordingly, and then the meshing between the second gear and the second rack is used to drive the suspension rod to move back and forth in the vertical direction, thereby driving the hanger and the workpiece suspended on the hanger to move up and down, so that the position of the workpiece in the vertical direction can be conveniently adjusted so as to immerse the workpiece in the tank liquid of the electrophoresis tank or take it out of the electrophoresis tank. It can be understood that the second motor is electrically connected to the controller; in order to prevent the sliding block from falling off the slide rail, the slide rail can be an I-shaped structure, and a T-slot is provided on the side of the sliding block away from the mounting seat, and the sliding block is nested on the slide rail through the T-slot thereon.

[0037] Furthermore, the rotary drive mechanism includes a third motor 61 and a reducer 62, wherein the reducer 62 is connected to the lower end of the suspension rod 51, the third motor 61 is connected to one side of the reducer 62, the output shaft of the reducer 62 is vertically arranged, and the hanger is connected to the output shaft of the reducer. With this solution, the third motor 61 is controlled to rotate by the controller, driving the reducer 62 connected thereto to rotate as well, and the output shaft of the reducer 62 is used to drive the hanger and the workpiece suspended on the hanger to rotate accordingly, thereby facilitating the improvement of the electrophoresis quality of the workpiece and the drainage effect of the workpiece after electrophoresis. It is understandable that the third motor is electrically connected to the controller.

[0038] Specifically, the hanger includes a connecting shaft 71, a support rod 72 and a hook for hanging the workpiece. The upper end of the connecting shaft 71 is coaxially connected to the output shaft of the reducer 62. A plurality of support rods are sequentially arranged on the left and right sides of the connecting shaft from top to bottom. Each support rod is perpendicular to the connecting shaft, and each support rod is provided with a hook. With this solution, since each support rod is provided with a hook, the hanger can hang multiple small workpieces through multiple hooks, so that multiple small workpieces can be electrophoretically coated at one time. At the same time, since the hanger rotates during electrophoresis, the electrophoretic quality of each small workpiece is good, and the thickness of the electrophoretic coating on each small workpiece is relatively consistent.

[0039] Preferably, the output shaft of the reducer 62 is coaxially connected to the connecting shaft 71 of the hanger through a coupling 63 .

[0040] Specifically, the support rods 72 are evenly arranged on the left and right sides of the connecting shaft 71 .

[0041] Furthermore, the hook includes a vertical rod 73 and two limiting rods 74, the lower end of the vertical rod 73 is vertically connected to the upper side of the support rod 72, and the two limiting rods 74 are relatively arranged on the left and right sides of the upper part of the vertical rod 73, so that the structure of the hook is relatively simple.

[0042] Specifically, the cathode electrophoresis system also includes a visual recognition system, which includes a camera and a video processor. The camera is used to shoot a video of the workpiece within a certain period of time after it is removed from the bath liquid of the electrophoresis tank and rotated to drain. The video processor is used to process and analyze the video to identify the number of water droplets dripping from the workpiece within the certain period of time, and then send it to the controller. The controller then determines whether the number of water droplets meets the requirements. If so, the horizontal drive mechanism is controlled to move to bring the workpiece to the next process. If not, the rotary drainage is repeated until the number of water droplets meets the requirements.

[0043] The general working process of the present invention is:

[0044] When the horizontal drive mechanism drives the moving plate to move to the top of the designated position of the electrophoresis tank or other pre-treatment tanks, the vertical drive mechanism is used to drive the hanger with the workpiece to slowly descend until the workpiece is immersed in the tank liquid of the electrophoresis tank, and then the rotary drive mechanism is used to drive the hanger with the workpiece to rotate in the tank liquid at a set speed such as 15 rpm. During the rotation process, the time when each part of the workpiece is directly facing or close to the anode tubes on both sides of the electrophoresis tank is equal, and the electric field strength obtained is also equal, thereby better ensuring that the thickness of the electrophoretic coating on each part of the workpiece after electrophoresis is relatively consistent; after the electrophoresis is completed, the vertical drive mechanism is used to drive the hanger and the workpiece to slowly rise to the set position;

[0045] Then, the rotary draining is performed, specifically: the controller controls the rotary drive mechanism to drive the workpiece to rotate with the hanger above the electrophoresis tank at a specified speed within a set time, so that the tank liquid on the workpiece drips downward to achieve drainage; preferably, the set time is 30s and the specified speed is 60rpm. In specific applications, the set time and the specified speed can be flexibly adjusted as needed to ensure that the workpiece obtains a better drainage effect;

[0046] After the rotational drainage is completed, the hanger and the workpiece stop rotating, and the controller controls the camera to continuously shoot video of the workpiece on the hanger for a certain period of time. The camera then transmits the video to the video processor, which processes and analyzes the video to identify the number of water drops dripping from the workpiece within the certain period of time, that is, the number of tank liquid dripping, and then sends the water drop number information to the controller. The controller then determines whether the number of water drops meets the requirements. If so, it controls the horizontal drive mechanism to move and drive the workpiece to the next process. If not, it drives the workpiece to repeat the rotational drainage until the number of water drops meets the requirements and then drives it to the next process.

[0047] In a specific embodiment, the above-mentioned certain time is 5s, that is, the camera continuously shoots a video of the workpiece for 5s after the rotation and drainage of the workpiece stops. If the number of water drops dripped from the workpiece in the 5s video is ≤10 drops, it indicates that the drainage requirement has been met, and the controller controls the horizontal drive mechanism to move and drive the workpiece to the next process; if the number of water drops dripped from the workpiece in the 5s video is greater than 10 drops, it indicates that the drainage requirement has not been met, and the controller controls the rotation drive mechanism to rotate and rotate the workpiece again to drain water until the number of water drops is ≤10 drops, and then drive the workpiece to the next process. It can be understood that the video processor can identify and analyze the number of water drops dripping on the workpiece in the video and calculate the number of water drops.

[0048] The present invention improves the uniformity of the thickness of the electrophoretic coating on the surface of the workpiece, which not only prevents the influence of the thin electrophoretic coating on the corrosion protection, but also prevents the cost increase caused by the thick electrophoretic coating; it can also reduce or eliminate the accumulation of liquid inside the workpiece, avoid the overflow of the accumulated liquid during baking, and improve the appearance quality of the workpiece; by introducing a visual recognition system to confirm the drainage effect of the workpiece, the drainage effect is ensured, and at the same time, the drainage process is unmanned and intelligent without manual inspection; and the system can also be used on other tanks on the coating line, which can reduce the channeling problem caused by the drainage of the workpiece, and the tank liquid is easier to maintain. In particular, the use of this system for small workpieces is conducive to improving the coating quality and realizing intelligent production. Other similar processes on the production line, such as degreasing and phosphating, can also use the above-mentioned hanger with a rotating function.

[0049] The present invention uses a hanger with a rotating function. On the one hand, it solves the problem of uneven film thickness caused by different contact electric field strengths on different parts of the workpiece during electrophoresis, thereby ensuring the coating quality. On the other hand, it reduces the accumulated liquid inside the workpiece through rotation, eliminating the damage to the paint film on the workpiece surface caused by the overflow of the accumulated liquid during baking. At the same time, in order to ensure the drainage effect, the drainage situation of the workpiece is identified and controlled through a visual recognition system, thereby realizing intelligent and unmanned drainage.

[0050] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A cathode electrophoresis system, characterized in that: It includes a hanger, a moving mechanism, and a controller. The moving mechanism includes a support plate, a moving plate, a suspension rod, a horizontal driving mechanism, a vertical driving mechanism, and a rotation driving mechanism. The support plate extends in the left and right directions, and the moving plate is slidably arranged on the support plate left and right. The horizontal driving mechanism is used to drive the moving plate to slide left and right on the support plate; a mounting seat is arranged on the moving plate, the suspension rod is vertically arranged, the suspension rod and the mounting seat are slidably matched, and the vertical driving mechanism is used to drive the suspension rod to reciprocate in the vertical direction; the rotation driving mechanism is arranged at the lower end of the suspension rod, the hanger is used to hang a workpiece, the hanger is connected to the rotation driving mechanism, and the rotation driving mechanism is used to drive the hanger to rotate; the horizontal driving mechanism, the vertical driving mechanism and the rotation driving mechanism are electrically connected to the controller respectively.

2. The cathode electrophoresis system according to claim 1, characterized in that: Two guide rails are arranged oppositely on the upper and lower sides of the front side of the support plate, and both of the guide rails extend in the left-right direction. Two sliders are arranged oppositely on the rear side of the movable plate, and the two sliders slide in one-to-one correspondence with the two guide rails.

3. The cathode electrophoresis system according to claim 2, characterized in that: The horizontal driving mechanism includes a first motor, a first gear and a first rack. The first rack is arranged on the front side of the support plate and is located between the two guide rails. The first rack is parallel to the guide rails. The first motor is vertically arranged on the front side of the movable plate. The output shaft of the first motor passes through the movable plate backward and is connected to the middle position of the first gear. The first gear is meshed with the first rack.

4. The cathode electrophoresis system according to claim 1, characterized in that: A slide rail is vertically arranged on the right side surface of the suspension rod, and a slide block for slidingly cooperating with the slide rail is arranged on the left side surface of the mounting seat.

5. The cathode electrophoresis system according to claim 4, characterized in that: The vertical drive mechanism includes a second motor, a second gear and a second rack. The second rack is vertically arranged on the right side of the suspension rod, and the second motor is vertically arranged on the rear side of the movable plate. The output shaft of the second motor passes forward through the movable plate and is connected to the middle position of the second gear. The second gear is meshed with the second rack.

6. The cathode electrophoresis system according to claim 1, characterized in that: The rotary drive mechanism includes a third motor and a reducer, the reducer is connected to the lower end of the suspension rod, the third motor is connected to one side of the reducer, the output shaft of the reducer is vertically arranged, and the hanger is connected to the output shaft of the reducer.

7. The cathode electrophoresis system according to claim 6, characterized in that: The hanger includes a connecting shaft, a support rod and a hook for hanging the workpiece. The upper end of the connecting shaft is coaxially connected to the output shaft of the reducer. A plurality of support rods are arranged on the left and right sides of the connecting shaft from top to bottom. Each support rod is perpendicular to the connecting shaft, and each support rod is provided with the hook.

8. The cathode electrophoresis system according to claim 7, characterized in that: The support rods are evenly arranged on the left and right sides of the connecting shaft.

9. The cathode electrophoresis system according to claim 7, characterized in that: The hook comprises a vertical rod and two limiting rods, the lower end of the vertical rod is vertically connected to the upper side of the support rod, and the two limiting rods are relatively arranged on the left and right sides of the upper part of the vertical rod.

10. The cathode electrophoresis system according to any one of claims 1 to 9, characterized in that: It also includes a visual recognition system, which includes a camera and a video processor. The camera is used to shoot a video of the workpiece within a certain period of time after it is removed from the bath liquid of the electrophoresis tank and rotated to drain. The video processor is used to process and analyze the video to identify the number of water droplets dripping from the workpiece within the certain period of time, and then send it to the controller.

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