Electroplating device and method for rotary workpiece

Abstract

The invention belongs to the technical field of electroplating devices, and relates to an electroplating device and method for a revolving body type workpiece. The device comprises a supporting frame, an electric assembly, an auxiliary anode connecting assembly, a cathode hanging frame and a conductive assembly. The electric assembly comprises an electroplating driving source and a rotary hook, the electroplating driving source is installed on the supporting frame, one end of the rotary hook is connected with the output end of the electroplating driving source, and the other end of the rotary hook is connected with the cathode hanging frame; the auxiliary anode connecting assembly comprises an auxiliary anode rod, an anode ring and an insulating block mounted in the center of the anode ring, and the rotary hook penetrates through the insulating block; a connecting mechanism is mounted on the support frame and is movably connected with the anode ring; the cathode hanger comprises a hook, an auxiliary anode and a connecting rod, the hook is connected with the rotary hook, and the auxiliary anode is connected with the other end of the auxiliary anode rod through the connecting rod. The problems that an existing electroplating device cannot be used for plating silver on the inner wall of the rotary body type workpiece, and a plating layer is thin and even cannot be plated are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electroplating devices, and particularly relates to an electroplating device and method for rotary body workpieces. Background Art

[0002] A large number of internal conductors used in high-voltage electrical products need to be surface silver-plated to improve their electrical conductivity. During the electroplating process of rotary body workpieces, both the outer wall and the inner wall need to be silver-plated. When the workpiece is electroplated, the anode plates are generally suspended on both sides in the length direction of the plating tank. Due to the influence of the structure of the rotary body workpiece itself, there will inevitably be silver-plated areas facing the anode and away from the anode. Due to the influence of the distribution of the electric lines formed by the movement of cations in the silver-plating solution, the thickness of the coating on the side facing the anode is significantly higher than that on the side away from the anode. To meet the overall thickness requirement of the process, the thickness of the silver-plated area on the side facing the anode will be seriously out of tolerance, resulting in waste of silver main materials. At the same time, since both the inner and outer walls of such workpieces need to be silver-plated, during the silver-plating process, due to the influence of the shielding of the electric lines, there are high risks in the silver-plating quality of the inner wall: one is that during the pre-plating process, the pre-plating layer is relatively thin or even there is no pre-plating layer, resulting in poor adhesion of the silver-plated layer; the other is that during the silver-plating process, the thickness of the silver layer on the inner wall of the workpiece is relatively thin or even there is no silver layer, resulting in a low qualified rate of the silver-plated parts. Summary of the Invention

[0003] The purpose of the present invention is to provide an electroplating device and method for rotary body workpieces, which solves the problem that the existing electroplating device cannot silver-plate the inner wall of rotary body workpieces, resulting in a relatively thin coating or even no coating.

[0004] The present invention is realized through the following technical solutions: The present invention discloses an electroplating device for rotary body workpieces, including a support frame, an electric component, an auxiliary anode connection component, a cathode hanger and a conductive component; The electric component includes an electroplating drive source and a rotating hook. The electroplating drive source is installed on the support frame. One end of the rotating hook is connected to the output end of the electroplating drive source, and the other end is connected to the cathode hanger for driving the cathode hanger to rotate; The auxiliary anode connection component includes an auxiliary anode rod and a connecting piece. The connecting piece includes an anode ring and an insulating block. The insulating block is installed at the center of the anode ring. The rotating hook passes through the insulating block and is fixedly connected to the insulating block; one end of the auxiliary anode rod is connected to the anode ring; A connection mechanism is installed on the support frame, and the connection mechanism is movably connected to the anode ring; The cathode hanger includes a hook, an auxiliary anode and a connecting rod. The hook is connected to the rotating hook, and the auxiliary anode is connected to the other end of the auxiliary anode rod through the connecting rod; The conductive component is installed on the support frame for supplying power to the electric component and the auxiliary anode.

[0005] Further, the connecting mechanism includes a connecting joint, a sliding sleeve, and an anode connecting rod. The connecting joint is fixedly connected to the support frame, the sliding sleeve is fixedly connected to the connecting joint, one end of the anode connecting rod is fixedly connected to the connecting joint, and the other end passes through the inner cavity of the sliding sleeve; When it is necessary to connect the connecting mechanism to the anode ring, the anode connecting rod moves toward the anode ring side by pushing and abuts against the outer side wall of the anode ring.

[0006] Further, a cross-shaped connecting member is installed inside the anode ring, and an insulating block is installed in the inner hole of the cross-shaped connecting member; A through hole is prefabricated in the center of the insulating block, and a rotary hook is fixedly installed in the through hole.

[0007] Further, the cathode hanger includes a hanger body. The hanger body includes an upper ring and a lower ring. The upper ring and the lower ring are connected by multiple vertical rods. A support rod is provided inside the lower ring. A connecting rod is welded to one of the vertical rods, and an auxiliary anode is fixed to the support rod.

[0008] Further, the hanger body is made of stainless steel, and the hook is made of copper.

[0009] Further, the conductive assembly includes a conductive bar, a conductive column, and a protective sleeve. The conductive column is connected to the support frame, the protective sleeve is sleeved outside the conductive column, the conductive bar is connected to the power supply through a cable, the conductive bar is movably connected to the conductive column, and when conduction is required, the conductive column abuts against the conductive bar.

[0010] Further, the conductive column is electrically connected to the electroplating drive source in the electric component through a cable.

[0011] Further, the conductive bar and the conductive column are made of copper.

[0012] Further, multiple electric components are installed.

[0013] The present invention also discloses an electroplating method for the electroplating device of the rotary body workpiece, including the following processes: After the conductive assembly is conductive, the conductive assembly conducts the current on the support frame, the connecting mechanism abuts against the anode ring, so that the anode ring is electrified, and the anode ring sequentially conducts the current into the auxiliary anode rod, the connecting rod, and the auxiliary anode to realize the current conduction of the auxiliary anode; At the same time, the support frame is connected to the negative pole of the power supply, the support frame is connected to the electric component, the rotary hook in the electric component is connected through the hook, and the workpiece is in conductive contact with the cathode hanger contact part to realize the current conduction of the cathode; The electroplating drive source drives the rotary hook to rotate, drives the anode ring and the cathode hanger to rotate together, and the workpiece located in the cathode hanger realizes rotary silver plating.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention discloses an electroplating device for rotary workpieces. Through the combined and collaborative action of a support frame, an electric component, an auxiliary anode connection component, a cathode hanger and a connection component, the dual-functional requirements of an internal auxiliary anode and self-rotation during the electroplating process of a silver-plated rotary workpiece with an inner cavity are realized. While improving the uniformity of the coating and saving the main material, the electroplating quality of the inner cavity is improved, meeting the quality requirements of the product.

[0015] After the workpiece is placed on the cathode hanger, subsequent electroplating operations can be carried out without redundant manual operations. It is easy to use and is a flexible device capable of realizing rapid production change, meeting the needs of modern enterprises.

[0016] By installing an electric component on the support frame, the cathode hanger is driven to rotate, realizing the self-rotation of the workpiece during the electroplating process, thereby avoiding the difference in power lines between the positive anode and the back anode, promoting the improvement of the coating thickness uniformity, and reducing the waste of the main material.

[0017] Through the cooperation of the auxiliary anode connection component with the auxiliary anode and the connecting rod in the cathode hanger, an internal auxiliary anode is realized, forming a dual anode, overcoming the problem that the power lines are blocked in the silver-plated area on the inner wall of the rotary workpiece in traditional operations, resulting in no coating or a thin coating in the silver-plated area on the inner wall.

[0018] Furthermore, the conductive component includes a conductive bar and a conductive column, which connect the conductive column with the conductive bar to form a circuit, thereby providing power for the electric component and the auxiliary anode respectively. It avoids the traditional method of using external plug-in power or external wiring, improving the reliability and safety of power taking.

[0019] Furthermore, an insulating block is installed at the center of the anode ring, and the rotating hook passes through the insulating block. The insulating block physically isolates the rotating hook from the anode ring, avoiding direct conduction between the rotating part and the anode, eliminating the short-circuit risk caused by mechanical wear, and at the same time allowing the cathode hanger to rotate to adapt to the dynamic balance of asymmetric workpieces.

[0020] Furthermore, except for the conductive contact parts in contact with the workpiece, the rest of the cathode hanger is subjected to one-time insulation and anti-corrosion protection, reducing the waste of the main material, and at the same time avoiding the risk of cathode-anode cross-current through insulation protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of an electroplating device for a rotary workpiece of the present invention; Figure 2 is a combined schematic diagram of an electric component and a cathode hanger; Figure 3 is a schematic structural diagram of a cathode hanger; Figure 4It is a schematic structural diagram of a conductive component.

[0022] Among them, 1. Support frame; 2. Electric component; 3. Auxiliary anode connection component; 4. Cathode hanger; 5. Conductive component; 21. Electroplating drive source; 22. Rotating hook; 31. Auxiliary anode rod; 32. Connector; 321. Connection joint; 322. Sliding sleeve; 323. Anode connecting rod; 324. Anode ring; 325. Insulating block; 41. Hook; 42. Auxiliary anode; 43. Connecting rod; 44. Upper ring; 45. Lower ring; 46. Upright rod; 51. Conductive bar; 52. Conductive column; 53. Protection sleeve. Specific implementation manners

[0023] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] The components described and shown in the accompanying drawings and embodiments of the present invention can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present invention provided in the following drawings is not intended to limit the scope of the present invention to be protected, but only represents a selected embodiment of the present invention. Based on the accompanying drawings and embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0025] It should be noted that the term "comprising", "including" or any other variant is intended to cover non-exclusive inclusion, such that a process, element, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to the process, element, method, article or device.

[0026] The following are explanations of relevant terms: Electroplating: It is a process of plating a layer of other metal or alloy on the metal surface using the electrolysis principle. Electroplating is an electrochemical reaction. In a silver plating solution, the electrode plate is the anode and the workpiece to be plated is the cathode. The "+" and "-" poles of the DC power supply are respectively connected to them. After power-on, the cations in the solution move towards the cathode under the action of the electric field and receive electrons on the cathode surface to form a coating.

[0027] Rotary electroplating: It is an electroplating method in which the workpiece to be plated (cathode) rotates relative to the anode continuously during the electroplating process, and electroplating is achieved during rotation.

[0028] Auxiliary anode: It is an additional component that provides the required electron flow and anode metal ions to facilitate the reactions during the electroplating process.

[0029] The features and performance of the present invention will be further described in detail below in conjunction with the embodiments.

[0030] As Figure 1 shown, the present invention discloses an electroplating device for a rotary workpiece, which includes a support frame 1, an electric component 2, an auxiliary anode connection component 3, a cathode hanger 4, and a conductive component 5; the support frame 1 is connected to the production line traveling crane to realize the transfer of the workpiece between the electroplating tanks. When transferred from the previous process to the electroplating process, electroplating is realized.

[0031] Figure 1 There are also two anode plates vertically connected to the bottom of the support frame 1 that are not shown in the figure. Currently, the two anode plates are arranged on both sides of the cathode hanger 4, but the support frame 1 is not directly connected to the anode plates. The anode plates act as anodes during the electroplating process and are connected to the positive pole of the electroplating power supply; the support frame 1 and the cathode hanger 4 act as cathodes and are connected to the negative pole of the electroplating power supply.

[0032] The electric component 2 includes an electroplating drive source 21 and a rotating hook 22. The electroplating drive source 21 is installed on the support frame 1. One end of the rotating hook 22 is connected to the output end of the electroplating drive source 21, and the other end is connected to the cathode hanger 4 for driving the cathode hanger 4 to rotate.

[0033] The electroplating drive source 21 generally uses a motor.

[0034] As Figure 2 shown, the auxiliary anode connection component 3 includes an auxiliary anode rod 31 and a connecting piece 32. The upper end of the auxiliary anode rod 31 is hung on the connecting piece 32 by a hook, and the lower end is installed in the inner cavity of the cathode hanger 4. Moreover, the auxiliary anode rod 31 is connected to the positive pole of the power supply through the connecting piece 32.

[0035] The connecting piece 32 includes a connection joint 321, a sliding sleeve 322, an anode connecting rod 323, an anode ring 324, and an insulating block 325; a cross-shaped connecting piece is installed inside the anode ring 324, the insulating block 325 is installed in the inner hole of the cross-shaped connecting piece, a through hole is prefabricated in the center of the insulating block 325, the rotating hook 22 passes through the through hole, and the insulating block 325 is fixedly connected to the rotating hook 22.

[0036] The anode ring 324 is coaxially arranged on the outer periphery of the insulating block 325, and the auxiliary anode rod 31 is hung on the anode ring 324.

[0037] The connecting joint 321 is fixedly connected to the support frame 1. One end of the sliding sleeve 322 is fixedly connected to the connecting joint 321. One end of the anode connecting rod 323 is fixedly connected to the connecting joint 321, and the other end passes through the inner cavity of the sliding sleeve 322. Moreover, the anode connecting rod 323 in the inner cavity of the sliding sleeve 322 can move towards the anode ring 324 by means of pushing and abut against the outer side wall of the anode ring 324.

[0038] The cathode hanger 4 is used to load the workpiece to be plated; as Figure 3 shown, the cathode hanger 4 is integrally welded. It mainly includes a hanger body, a hook 41 connected to the rotating hook 22, an auxiliary anode 42, and a connecting rod 43. The hook 41 is designed in an S shape (it can be other shapes), and through cooperation with the rotating hook 22, current conduction during the electroplating process is achieved. The auxiliary anode 42 is reasonably set according to the anode area requirement. The connecting rod 43 is fixedly welded to the hanger body and is connected to the auxiliary anode rod 31 at the upper part.

[0039] Specifically, as Figure 3 shown, the hanger body includes an upper ring 44 and a lower ring 45. The upper ring 44 and the lower ring 45 are connected by multiple vertical rods 46. A support rod 47 is provided inside the lower ring 45. The connecting rod 43 is welded to one of the vertical rods 46, and the auxiliary anode 42 is fixed to the support rod 47.

[0040] Except for the conductive contact parts in contact with the workpiece, the rest of the cathode hanger 4 has been subjected to one-time insulation and anti-corrosion protection.

[0041] As Figure 4 shown, the conductive assembly 5 includes a conductive busbar 51, a conductive column 52, and a protective sleeve 53. The conductive column 52 is connected to the support frame 1. After the support frame 1 descends to the electroplating station, by applying pressure, the conductive column 52 is connected to the conductive busbar 51 to form a circuit, thereby providing power for the auxiliary anode 42. The protective sleeve 53 is designed according to the size of the conductive column 52 to achieve the purpose of insulation protection.

[0042] The conductive column 52 is electrically connected to the electroplating drive source 21 in the electric assembly 2 through a cable, thereby providing power for the electric assembly 2.

[0043] Specifically, the conductive busbar 51 is connected to the power supply through a cable. After the conductive column 52 is conductive with the conductive busbar 51, the conductive busbar 51 conducts current to the support frame 1 through the conductive column 52. The anode connecting rod 323 abuts against the anode ring 324, making the anode ring 324 energized. The anode ring 324 sequentially conducts current into the auxiliary anode rod 31, the connecting rod 43, and the auxiliary anode 42, thereby realizing current conduction of the auxiliary anode.

[0044] The workpiece is in conductive contact with the cathode hanger 4 at the contact part. The hook 41 in the cathode hanger 4 is connected to the rotating hook 22 in the electric component 2. The electric component 2 is connected to the support frame 1, and the support frame 1 is connected to the negative pole of the power supply, thereby realizing the current conduction of the cathode. The cations in the solution move towards the inner wall of the workpiece under the action of the electric field, and accept electrons on the surface of the inner wall of the workpiece to form a coating.

[0045] At the same time, the electroplating drive source 21 drives the rotating hook 22 to rotate, and then drives the anode ring 324 and the cathode hanger 4 to rotate together, driving the workpiece located in the cathode hanger 4 to realize rotary silver plating.

[0046] It is rigidly connected to the auxiliary anode rod 31 through the connecting rod 43, and moves synchronously with the rotation of the workpiece, forming a dynamic annular electric field, accurately compensating the current density for the regions with sudden curvature changes of the rotary body (such as steps and conical surfaces), and avoiding local overplating or underplating caused by the "tip effect".

[0047] The present invention is applicable to rotary body workpieces with silver plating on the inner cavity, and can be applied to silver plating on both the inner and outer walls at the same time, or only to silver plating on the inner wall.

[0048] During the electroplating process of such workpieces, by installing the electric component 2 on the support frame 1, the electric component 2 drives the rotating hook 22 to rotate, thereby realizing the self-rotation of the workpiece and achieving the purpose of improving the coating uniformity. Through the cooperation of the auxiliary anode connection component 3 and the cathode hanger 4, the purpose of the built-in auxiliary anode 42 of the workpiece is realized, thereby avoiding the quality problem of silver plating on the inner wall caused by the shielding of the power lines.

[0049] Specifically, the hanger body of the cathode hanger 4 is welded with stainless steel material, and the hook 41 connected to the rotating hook 22 is made of copper material to improve its conductivity as much as possible. Except for the conductive parts, the rest of the cathode hanger 4 is insulated to isolate the electroplating solution.

[0050] Multiple groups of electric components 2 are installed on the support frame 1 to facilitate increasing the installation quantity of the cathode hanger 4, and then improving the quantity of rotary body workpieces electroplated at one time. To meet the power-on requirements of the electric component 2, the conductive bar 51 and the conductive column 52 in the conductive component 5 are preferably made of copper material to improve its current conduction ability as much as possible and ensure good functions.

[0051] The device structure features in the present invention meet the electroplating quality requirements for workpieces of silver-plated rotating bodies with inner cavities, realizing the dual-functional requirements of an internal auxiliary anode 42 and the self-rotation of the workpiece, promoting the improvement of coating uniformity, and promoting the development of electroplating quality towards high reliability and high stability. This device collaborates with the auxiliary anode through dynamic rotation, breaking through the two major bottlenecks of "uniformity" and "deep cavity coverage" in the electroplating of rotating bodies. At the same time, through modular design, it takes into account flexible production and maintenance costs, and is particularly suitable for fields such as automobiles, aviation, and precision machinery that have strict requirements for surface quality. Compared with traditional equipment, the comprehensive production efficiency is improved, and it is an efficient solution to solve the electroplating problems of rotating body workpieces.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present invention or make equivalent replacements, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. An electroplating device for a rotary workpiece, characterized in that It includes a support frame (1), an electric component (2), an auxiliary anode connection component (3), a cathode hanger (4), and a conductive component (5); The electric component (2) includes an electroplating drive source (21) and a rotating hook (22). The electroplating drive source (21) is installed on the support frame (1). One end of the rotating hook (22) is connected to the output end of the electroplating drive source (21), and the other end is connected to the cathode hanger (4) for driving the cathode hanger (4) to rotate; The auxiliary anode connection component (3) includes an auxiliary anode rod (31) and a connecting piece (32). The connecting piece (32) includes an anode ring (324) and an insulating block (325). The insulating block (325) is installed at the center of the anode ring (324). The rotating hook (22) passes through the insulating block (325) and is fixedly connected to the insulating block (325); One end of the auxiliary anode rod (31) is connected to the anode ring (324); A connection mechanism is installed on the support frame (1), and the connection mechanism is movably connected to the anode ring (324); The cathode hanger (4) includes a hook (41), an auxiliary anode (42), and a connecting rod (43). The hook (41) is connected to the rotating hook (22), and the auxiliary anode (42) is connected to the other end of the auxiliary anode rod (31) through the connecting rod (43); The conductive component (5) is installed on the support frame (1) for supplying power to the electric component (2) and the auxiliary anode (42).

2. The electroplating device for a rotary workpiece according to claim 1, characterized in that, The connection mechanism includes a connection joint (321), a sliding sleeve (322), and an anode connecting rod (323). The connection joint (321) is fixedly connected to the support frame (1). The sliding sleeve (322) is fixedly connected to the connection joint (321). One end of the anode connecting rod (323) is fixedly connected to the connection joint (321), and the other end passes through the inner cavity of the sliding sleeve (322); When it is necessary to connect the connection mechanism to the anode ring (324), the anode connecting rod (323) moves towards the anode ring (324) by pushing and abuts against the outer side wall of the anode ring (324).

3. The electroplating device for a rotary workpiece according to claim 1, characterized in that, A cross-shaped connecting piece is installed inside the anode ring (324), and the insulating block (325) is installed in the inner hole of the cross-shaped connecting piece; A through hole is prefabricated at the center of the insulating block (325), and the rotating hook (22) is fixedly installed in the through hole.

4. The electroplating device for a rotary workpiece according to claim 1, characterized in that, The cathode hanger (4) includes a hanger body. The hanger body includes an upper ring (44) and a lower ring (45). The upper ring (44) and the lower ring (45) are connected by multiple vertical rods (46). A support rod (47) is provided inside the lower ring (45). The connecting rod (43) is welded to one of the vertical rods (46), and the auxiliary anode (42) is fixed to the support rod (47).

5. The electroplating device for a rotary workpiece according to claim 4, characterized in that, The hanger body is made of stainless steel, and the hook (41) is made of copper.

6. The electroplating device for a rotary workpiece according to claim 1, characterized in that, The conductive component (5) includes a conductive bar (51), a conductive post (52), and a protective sleeve (53). The conductive post (52) is connected to the support frame (1), the protective sleeve (53) is sleeved outside the conductive post (52), the conductive bar (51) is connected to the power supply through a cable, and the conductive bar (51) is movably connected to the conductive post (52). When conduction is required, the conductive post (52) abuts against the conductive bar (51).

7. An electroplating device for a rotary workpiece according to claim 6, characterized in that, The conductive post (52) is electrically connected to the electroplating drive source (21) in the electric component (2) through a cable.

8. An electroplating device for a rotary workpiece according to claim 6, characterized in that, The conductive bar (51) and the conductive post (52) are made of copper.

9. The electroplating device for a rotary workpiece according to claim 1, characterized in that, Multiple electric components (2) are installed.

10. The electroplating method of the electroplating device for a rotary workpiece according to any one of claims 1-9, characterized in that, It includes the following processes: After the conductive component (5) conducts electricity, the conductive component (5) conducts the current on the support frame (1), and the connecting mechanism abuts against the anode ring (324) to energize the anode ring (324). The anode ring (324) sequentially conducts the current into the auxiliary anode rod (31), the connecting rod (43), and the auxiliary anode (42) to achieve current conduction of the auxiliary anode. At the same time, the support frame (1) is connected to the negative pole of the power supply, the support frame (1) is connected to the electric component (2), the rotating hook (22) in the electric component (2) is connected to the hook (41), and the workpiece is in conductive contact with the conductive contact part of the cathode hanger (4) to achieve current conduction of the cathode. The electroplating drive source (21) drives the rotating hook (22) to rotate, drives the anode ring (324) and the cathode hanger (4) to rotate together, and the workpiece located in the cathode hanger (4) realizes rotary silver plating.

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