Metal workpiece surface rust removal device

Abstract

The invention relates to a metal workpiece surface derusting device, and relates to the technical field of metal workpiece derusting equipment.The metal workpiece surface derusting device comprises a derusting pool, a sliding rail, a sliding groove and a mechanical arm used for clamping a workpiece, the sliding groove is formed in the upper end of the inner side wall of the derusting pool, an inserting groove is formed in the position, close to the lower portion of the sliding groove, of the derusting pool, and a supporting rod is inserted into the inserting groove; the supporting rod is sleeved with a fixing plate. The sliding rail is located on the periphery of the rust removal pool, the mechanical arm is composed of a base, a large arm, a small arm, a clamping part and a driving device, a pulley matched with the sliding rail is installed at the bottom of the base, and the clamping part is fixedly installed at the front end of the small arm. By arranging the annular sliding rail and the mechanical arm, the mechanical arm can move at any position on the periphery of the rust removal pool, and therefore all-directional movement of a workpiece in the rust removal pool is achieved. By means of the design, the problem that in the prior art, the motion range of a mechanical arm is limited is solved, comprehensive rust removal can be conducted on the complex surface of the workpiece, and the rust removal efficiency and flexibility are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal workpiece rust removal equipment, in particular to a metal workpiece surface rust removal device. Background Art

[0002] As a non-renewable resource, metal plays a very important role in industrial production and manufacturing as well as production and life. Therefore, the treatment of metal surface is particularly important. Rust removal is required before production to facilitate subsequent production and use.

[0003] A Chinese patent document with the authorization publication number CN119525206A discloses a rust removal and cleaning device for metal surface treatment, including a matching placement structure and a cleaning treatment structure. The lower end of the matching placement structure is fixedly connected to the cleaning treatment structure. A filter treatment seat is provided in the cleaning treatment structure, and the filter treatment seat can be separated from the cleaning treatment structure. The matching placement structure includes a hydraulic control seat, a protective plate frame, a telescopic guide rod, a support table and a clamping control component. The center of the protective plate frame is fixedly installed with a hydraulic control seat. The lower end limit of the hydraulic control seat is connected to the support table. The lower end limit of the support table is connected to the clamping control component. The clamping control component includes a connecting mechanism and a metal plate. The connecting mechanism is used for limiting and fixing the metal plate. By setting the matching placement structure and the cleaning treatment structure, metal rust removal work is facilitated.

[0004] In the field of rust removal on metal workpiece surfaces, common rust removal devices currently consist of a rust removal tank, a robotic arm, and a clamping device for holding the workpiece. These devices typically use a robotic arm to transport the workpiece into the rust removal tank, where a rust removal solution is applied to the workpiece surface for chemical or physical rust removal. For example, some existing rust removal devices utilize a fixed clamping device to secure the workpiece within the rust removal tank during treatment. Others utilize a simple robotic arm to move the workpiece, but this limited range of motion prevents comprehensive rust removal.

[0005] Furthermore, some existing rust removal devices have a relatively simple clamping structure when clamping the workpiece, typically relying solely on simple clamping claws for securement. This design can easily loosen due to vibration or impact on the workpiece during the rust removal process, causing the workpiece to fall off, compromising both rust removal effectiveness and safety. Furthermore, existing clamping devices lack effective protective measures, allowing rust removal fluid to easily splash onto the mechanical structure of the clamping device, causing corrosion and damage, and increasing equipment maintenance costs. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. The purpose of the present invention is to provide a device for removing rust from the surface of a metal workpiece, which is used to solve the problems raised in the above background technology.

[0007] In order to solve the above problems, the present invention provides a rust removal device for the surface of a metal workpiece, comprising a rust removal pool, a slide rail, a slide groove and a mechanical arm for clamping the workpiece, the slide groove is arranged at the upper end of the inner wall of the rust removal pool, the rust removal pool is provided with a slot near the bottom of the slide groove, a support rod is inserted in the slot, and a fixing plate is sleeved on the support rod; the slide rail is located at the periphery of the rust removal pool, and the mechanical arm consists of a base, a large arm, a small arm, a clamping part and a driving device, a pulley adapted to the slide rail is installed at the bottom of the base, the clamping part is fixedly installed at the front end of the small arm, an auxiliary device is provided at the bottom of the clamping part, a support arm is movably installed on the side of the large arm of the mechanical arm, and a pulley adapted to the slide groove is installed at the front end of the support arm.

[0008] The metal workpiece surface rust removal device provided by the present invention also has the following technical features:

[0009] Furthermore, the shape of the fixing plate is adapted to the inner wall of the rust removal pool, and the thickness of the fixing plate is less than the depth of the rust removal pool, so that the fixing plate can separate the rust removal pool into two areas. The surface of the fixing plate is provided with multiple through holes, which are used to allow the rust removal liquid to pass smoothly during the rust removal process, and at the same time, when the fixing plate is unfolded to support the workpiece, it can prevent the workpiece from slipping.

[0010] Furthermore, the clamping part includes a clamping claw and a clamping drive mechanism for driving the clamping claw to open and close. The clamping claws are multiple and evenly distributed at the front end of the clamping part, and an anti-slip pad is provided on the inner side of the clamping claw to increase the friction when clamping the workpiece and ensure that the workpiece is firmly clamped. The clamping drive mechanism includes a hydraulic cylinder or an air cylinder, and the piston rod of the hydraulic cylinder or the cylinder is connected to the clamping claw. The opening and closing action of the clamping claw is controlled by hydraulic or air pressure to achieve clamping and release of the workpiece.

[0011] Furthermore, the auxiliary device includes a plurality of elastic support members, one end of the elastic support member is connected to the bottom of the clamping portion, and the other end is connected to the forearm of the robotic arm. The elastic deformation of the elastic support member is used to buffer external forces and ensure the stability of the clamping portion.

[0012] Furthermore, both ends of the support rod close to the fixed plate are provided with locking rings, and the locking rings are used to lock the fixed plate on the support rod. Both ends of the support rod close to the slot are provided with positioning rings, and the positioning rings are used to fix the support rod on the slot.

[0013] Furthermore, the base is fixedly mounted on the bottom of the robotic arm, the bottom of the upper arm is rotatably connected to the base via a first bearing, and the lower arm and the upper arm are rotatably connected via a second bearing.

[0014] Furthermore, the slide rail is an annular rail that surrounds the periphery of the rust removal tank, so that the robotic arm can move to any position around the rust removal tank to achieve all-round rust removal operations on the workpiece.

[0015] Furthermore, the driving device of the robotic arm includes a motor and a reducer, and the motor drives the rotation of the upper arm and the lower arm through the reducer, thereby realizing the clamping and moving operation of the clamping part on the workpiece.

[0016] Furthermore, a pressure sensor is provided on the clamping part of the robotic arm for detecting the pressure when clamping the workpiece, so as to prevent the workpiece from being damaged by excessive clamping force or from slipping due to insufficient clamping force.

[0017] Furthermore, a drain outlet is provided at the bottom of the rust removal pool for discharging the used rust removal liquid, so as to facilitate the cleaning and maintenance of the rust removal pool.

[0018] The present invention has the following beneficial effects: First, by providing an annular slide rail and a robotic arm, the present invention enables the robotic arm to move to any position outside the rust removal tank, thereby achieving full range movement of the workpiece within the rust removal tank. This design solves the problem of limited range of motion of the robotic arm in the prior art, enabling comprehensive rust removal on complex workpiece surfaces, significantly improving rust removal efficiency and flexibility.

[0019] 2. The clamping portion of the present application includes a plurality of clamping claws and uses a hydraulic cylinder or an air cylinder as a clamping drive mechanism, which can accurately control the opening and closing of the clamping claws through hydraulic or air pressure. An anti-slip pad is provided on the inner side of the clamping claw to increase the friction when clamping the workpiece and ensure that the workpiece is firmly clamped. In addition, the elastic support member in the auxiliary device can buffer external forces and further improve the stability of the clamping portion. These improvements effectively solve the problems of poor stability of the clamping device and easy loosening of the workpiece in the prior art, ensuring that the workpiece remains stable at all times during the rust removal process.

[0020] Third, the rust removal tank of the present application is equipped with a removable fixed plate secured by support rods and a locking ring. The fixed plate divides the rust removal tank into two areas. Through-holes in the fixed plate allow the rust removal liquid to pass through smoothly, while also supporting the workpiece during deployment to prevent it from slipping. This design optimizes the rust removal tank's functionality, resolving the existing issues of limited functionality and the inability to flexibly adjust the rust removal space, thereby improving its adaptability and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Figure 1 It is a structural diagram of the rust removal pool in the present invention;

[0023] Figure 2 It is a schematic side cross-sectional structural diagram of the robotic arm of the present invention;

[0024] Figure 3 It is a schematic diagram of the enlarged structure of point A in the present invention;

[0025] Figure 4 It is a structural schematic diagram of the fixing plate in the present invention;

[0026] Figure 5 It is a structural schematic diagram of the clamping claw in the present invention.

[0027] Explanation of the accompanying drawings: 1-rust removal tank, 2-slide rail, 3-slide groove, 4-mechanical arm, 41-base, 410-pulley, 42-upper arm, 420-first bearing, 421-second bearing, 43-small arm, 44-clamping part, 441-clamping claw, 442-clamping drive mechanism, 45-driving device, 5-slot, 6-support rod, 611-locking ring, 622-positioning ring, 7-fixing plate, 8-auxiliary device, 81-elastic support member, 9-support arm, 10-pulley. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0029] like Figures 1 to 5 In one embodiment of the metal workpiece surface rust removal device of the present invention, the metal workpiece surface rust removal device of this embodiment includes a rust removal tank 1, a slide rail 2, a slide trough 3 and a mechanical arm 4 for clamping the workpiece.

[0030] The chute 3 is provided at the upper end of the inner wall of the rust removal tank 1, and is used to support the movement of the support arm 9 of the robot 4. The support arm 9 is movably mounted on the side of the arm 42 of the robot 4, and its front end is equipped with a pulley 10 that precisely fits the chute 3 to ensure that the robot 4 can be stably supported by the chute 3 when moving.

[0031] The rust removal tank 1 is provided with a slot 5 below the slide 3, in which a support rod 6 is inserted, and a fixing plate 7 is mounted on the rod. The fixing plate 7 is adapted to the shape of the inner wall of the rust removal tank 1 and its thickness is less than the tank depth, which can divide the tank body into two areas, and the rust removal space can be flexibly adjusted to accommodate workpieces of different sizes. Locking rings 611 are mounted on both ends of the support rod 6 near the fixing plate 7 to firmly lock the fixing plate 7 and ensure its stability in use; positioning rings 622 are mounted on both ends of the support rod 6 near the slot 5 to prevent the support rod 6 from shifting in the slot 5 and ensure the stability of the support structure. A drain outlet is provided at the bottom of the rust removal tank 1 to facilitate the discharge of rust-removing liquid and facilitate cleaning and maintenance.

[0032] The slide rail 2 is located outside the rust removal pool 1 and is annularly surrounded. A pulley 410 adapted to the slide rail 2 is installed at the bottom of the base 41 of the robot arm 4, so that the robot arm 4 can move on the slide rail 2 and realize full-scale movement around the rust removal pool 1, breaking through the limitation of the motion range of traditional robot arms.

[0033] The base 41 of the robotic arm 4 is fixed at the bottom, and the bottom of the upper arm 42 is rotatably connected to the base 41 through the first bearing 420, laying the foundation for the stable rotation of the upper arm 42. The small arm 43 is rotatably connected to the upper arm 42 by the second bearing 421, which enhances the flexibility of the robotic arm 4. The clamping part 44 is fixed to the front end of the small arm 43, and accurately clamps and moves the workpiece as the small arm 43 moves. The clamping part 44 contains a plurality of clamping claws 441 and a clamping drive mechanism 442. The inner side of the clamping claw 441 is provided with an anti-slip pad, which is evenly distributed at the front end of the clamping part 44 to increase friction and prevent the workpiece from loosening and falling off. The clamping drive mechanism 442 uses a hydraulic cylinder or an air cylinder, and its piston rod is connected to the clamping claw 441. The opening and closing are accurately controlled by hydraulic or pneumatic pressure to ensure that the clamping force is stable and accurate. The auxiliary device 8 at the bottom of the clamping part 44 includes a plurality of elastic support members 81 , one end of which is connected to the bottom of the clamping part 44 and the other end is connected to the small arm 43 of the robot arm 4 , so as to buffer external forces by elastic deformation and enhance the stability of the clamping part 44 .

[0034] The drive unit 45 of the robotic arm 4 includes a motor and a reducer. The motor, through the reducer, drives the rotation of the upper arm 42 and the lower arm 43, providing power for the clamping unit 44 to grip and move the workpiece. The clamping unit 44 is equipped with a pressure sensor to monitor the clamping pressure in real time, preventing damage to the workpiece due to excessive force or slippage due to insufficient force. Adjustments are made based on this monitoring data to ensure safe rust removal of the workpiece.

[0035] In one embodiment of the present application, preferably, the rust removal pool 1 is provided with a slot 5 below the slide 3, in which a support rod 6 is inserted, and a fixed plate 7 is sleeved on the rod. The fixed plate 7 is adapted to the shape of the inner wall of the rust removal pool 1 and its thickness is less than the depth of the rust removal pool 1, and the rust removal pool 1 can be divided into two areas, which is convenient for flexible adjustment of the rust removal space according to workpieces of different sizes. A plurality of through holes are provided on the surface of the fixed plate 7, which allow the rust removal liquid to pass smoothly during the rust removal process, and at the same time, play the role of supporting the workpiece when the fixed plate 7 is unfolded to prevent the workpiece from slipping. Locking rings 611 are sleeved at both ends of the support rod 6 near the fixed plate 7 for locking the fixed plate 7 to ensure its stability; positioning rings 622 are sleeved at both ends of the support rod 6 near the slot 5 to prevent the support rod 6 from shifting in the slot 5, thereby ensuring the stability of the support structure. A drain port is provided at the bottom of the rust removal pool 1 to facilitate the discharge of rust removal liquid and facilitate cleaning and maintenance. When installing the fixing plate 7, the support rod 6 should be inserted into the slot 5 of the rust removal pool 1 first, and the support rod 6 should be preliminarily fixed by the positioning ring 622 so that its position in the slot 5 is accurate. The fit between the positioning ring 622 and the slot 5 should be tight. Then, the fixing plate 7 on the support rod 6 should be adjusted to be perpendicular or parallel to the rust removal pool 1 as needed, and then the fixing plate is firmly locked on the support rod 6 by the locking ring 611.

[0036] In one embodiment of the present application, the slide rail 2 is preferably located outside the rust removal tank 1, forming a circular ring around the rust removal tank 1, allowing the robotic arm 4 to move in all directions around the rust removal tank 1, breaking through the limitations of the motion range of traditional robotic arms. A pulley 410 adapted to the slide rail 2 is mounted at the bottom of the base 41 of the robotic arm 4, ensuring stable movement of the robotic arm 4 on the slide rail 2.

[0037] The robot arm 4 consists of a base 41, an upper arm 42, a lower arm 43, a clamping unit 44, and a drive unit 45. The base 41 is fixed to the bottom, the lower part of the upper arm 42 is rotatably connected to the base 41 via a first bearing 420, and the lower arm 43 is rotatably connected to the upper arm 42 via a second bearing 421. The clamping unit 44 is fixed to the front end of the lower arm 43 and moves with the lower arm 43 to precisely clamp and move the workpiece.

[0038] In one embodiment of the present application, preferably, the clamping portion 44 includes a plurality of clamping claws 441 and a clamping drive mechanism 442. The clamping claws 441 are evenly distributed at the front end of the clamping portion 44, and an anti-slip pad is provided on the inner side to increase friction and prevent the workpiece from loosening and falling off. The clamping drive mechanism 442 uses a hydraulic cylinder or an air cylinder, and its piston rod is connected to the clamping claw 441, and the opening and closing are precisely controlled by hydraulic or air pressure to ensure that the clamping force is stable and accurate. The bottom of the clamping portion 44 is assembled with an auxiliary device 8, which includes a plurality of elastic support members 81, one end of which is connected to the bottom of the clamping portion 44, and the other end is connected to the forearm 43 of the robot arm 4, so as to buffer external forces by elastic deformation and enhance the stability of the clamping portion 44. The design of the clamping claw 441 has certain versatility and adjustability. The shape of the clamping claw 441 can be optimized according to the common shape of metal workpieces. The elastic support part 81 is made of highly elastic spring steel or rubber material, and its elastic coefficient should be reasonably selected according to the load of the robotic arm and the weight of the workpiece. When the robotic arm clamps the workpiece at a certain speed and moves it up, down, left and right, the vibration amplitude of the clamping part and the workpiece is measured. The elastic support part ensures that it can effectively reduce the influence of external force on the workpiece and the clamping part, thereby improving the stability and safety of the rust removal operation.

[0039] In one embodiment of the present application, the drive device 45 of the robotic arm 4 preferably includes a motor and a reducer. The motor drives the upper arm 42 and the lower arm 43 through the reducer to rotate, providing power for the clamping portion 44 to clamp and move the workpiece. The clamping portion 44 is equipped with a pressure sensor to monitor the clamping pressure in real time to prevent damage to the workpiece due to excessive force or slippage due to insufficient force. The clamping portion 44 can make timely adjustments based on the monitoring data to ensure safe rust removal of the workpiece.

[0040] Working principle of this application: Rust removal operation of workpiece

[0041] The robotic arm 4 moves to the top of the rust removal tank 1 via the slide rail 2 . After the clamping portion 44 clamps the workpiece, the robotic arm 4 sends the workpiece into the rust removal tank 1 .

[0042] The workpiece is immersed in the rust removal liquid in the rust removal tank 1, and the rust removal liquid is used to perform chemical or physical rust removal on the surface of the workpiece.

[0043] The robot arm 4 can move to any position around the rust removal tank 1. By rotating the upper arm 42 and the lower arm 43, the workpiece can move in all directions in the rust removal tank 1, thereby completely removing rust from the complex surface of the workpiece.

[0044] After the rust removal is completed, the robot arm 4 takes the workpiece out of the rust removal tank 1 to complete the rust removal operation.

[0045] Use of rust removal pool 1

[0046] Rust removal liquid is injected into the rust removal pool 1, and the rust removal pool 1 is divided into two areas by the fixing plate 7. The through holes provided on the surface of the fixing plate 7 allow the rust removal liquid to pass smoothly, and at the same time, when the fixing plate 7 is unfolded, it plays the role of supporting the workpiece to prevent the workpiece from slipping.

[0047] After use, the rust removal liquid is discharged through the drain port at the bottom of the rust removal tank 1, which is convenient for cleaning and maintenance of the rust removal tank 1.

[0048] The electrical components mentioned in this article are all connected to an external main controller and 220V AC power, and the main controller can be a conventional known device that performs control such as a computer.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A device for removing rust from the surface of a metal workpiece, characterized in that: The invention comprises a rust removal tank (1), a slide rail (2), a slide groove (3) and a mechanical arm (4) for clamping a workpiece, wherein the slide groove (3) is arranged at the upper end of the inner wall of the rust removal tank (1), the rust removal tank (1) is provided with a slot (5) below the slide groove (3), a support rod (6) is inserted into the slot (5), and a fixing plate (7) is sleeved on the support rod (6); the slide rail (2) is located at the periphery of the rust removal tank (1), and the mechanical arm (4) is composed of a base (41), a large arm (42), The mechanical arm (4) is composed of a small arm (43), a clamping part (44) and a driving device (45); a pulley (410) adapted to the slide rail (2) is installed at the bottom of the base (41); the clamping part (44) is fixedly installed at the front end of the small arm (43); an auxiliary device (8) is provided at the bottom of the clamping part (44); a supporting arm (9) is movably installed on the side of the large arm (42) of the mechanical arm (4); and a pulley (10) adapted to the slide groove (3) is installed at the front end of the supporting arm (9).

2. The metal workpiece surface rust removal device according to claim 1, characterized in that: The shape of the fixing plate (7) is adapted to the inner wall of the rust removal pool (1), and the thickness of the fixing plate (7) is less than the depth of the rust removal pool (1), so that the fixing plate (7) can separate the rust removal pool (1) into two areas. The surface of the fixing plate (7) is provided with a plurality of through holes, which are used to allow the rust removal liquid to pass smoothly during the rust removal process, and to prevent the workpiece from slipping when the fixing plate (7) is unfolded to lift the workpiece.

3. The metal workpiece surface rust removal device according to claim 1, characterized in that: The clamping portion (44) includes a clamping claw (441) and a clamping drive mechanism (442) for driving the clamping claw (441) to open and close. The clamping claws (441) are multiple and evenly distributed at the front end of the clamping portion (44). Anti-slip pads are provided on the inner sides of the clamping claws (441) to increase the friction force when clamping the workpiece and ensure that the workpiece is firmly clamped. The clamping drive mechanism (442) includes a hydraulic cylinder or an air cylinder. The piston rod of the hydraulic cylinder or the cylinder is connected to the clamping claw (441). The opening and closing action of the clamping claw (441) is controlled by hydraulic pressure or air pressure to achieve clamping and releasing of the workpiece.

4. The metal workpiece surface rust removal device according to claim 1, characterized in that: The auxiliary device (8) includes a plurality of elastic support members (81), one end of each elastic support member (81) is connected to the bottom of the clamping portion (44), and the other end is connected to the small arm (43) of the robot arm (4). The elastic deformation of the elastic support member (81) is used to buffer external forces and ensure the stability of the clamping portion (44).

5. The metal workpiece surface rust removal device according to claim 1, characterized in that: Both ends of the support rod (6) close to the fixing plate (7) are sleeved with locking rings (611), and the locking rings (611) are used to lock the fixing plate (7) on the support rod (6). Both ends of the support rod (6) close to the slot (5) are sleeved with positioning rings (622), and the positioning rings (622) are used to fix the support rod (6) on the slot (5).

6. The metal workpiece surface rust removal device according to claim 1, characterized in that: The base (41) is fixedly mounted on the bottom of the mechanical arm (4); the bottom of the upper arm (42) is rotatably connected to the base (41) via a first bearing (420); and the lower arm (43) is rotatably connected to the upper arm (42) via a second bearing (421).

7. The metal workpiece surface rust removal device according to claim 1, characterized in that: The slide rail (2) is a ring rail that surrounds the periphery of the rust removal tank (1), so that the mechanical arm (4) can move to any position around the rust removal tank (1) to achieve all-round rust removal operations on the workpiece.

8. The metal workpiece surface rust removal device according to claim 1, characterized in that: The driving device (45) of the mechanical arm (4) includes a motor and a reducer, and the motor drives the rotation of the large arm (42) and the small arm (43) through the reducer, thereby realizing the clamping and moving operation of the clamping part (44) on the workpiece.

9. The metal workpiece surface rust removal device according to claim 1, characterized in that: A pressure sensor is provided on the clamping portion (44) of the mechanical arm (4) for detecting the pressure when clamping the workpiece, so as to prevent the workpiece from being damaged by excessive clamping force or from slipping due to insufficient clamping force.

10. The metal workpiece surface rust removal device according to claim 1, characterized in that: The bottom of the rust removal pool (1) is provided with a drain outlet for discharging the used rust removal liquid, thereby facilitating cleaning and maintenance of the rust removal pool (1).

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