Fixture for electroplating processing

Abstract

The invention relates to the technical field of electroplating machining, in particular to an electroplating machining clamp which comprises a hook, a protective sleeve, a fixing plate, a cover plate, a first gasket and a second gasket, the hook is connected with the protective sleeve, the protective sleeve is of an annular structure and is provided with a mounting hole matched with the hook in the radial direction, the fixing plate is in a disc shape, and a through inner hole is formed in the middle of the fixing plate; a screw penetrates through the protective sleeve to fix the fixing plate through an inner hole of the fixing plate, the outer side of the fixing plate is matched with the inner side of the protective sleeve, the first gasket, the second gasket and the cover plate are used for clamping a part on the fixing plate, and the inner side of the cover plate is matched with the inner hole of the fixing plate. Through an annular clamping structure, modular design and a rapid positioning mechanism, stable clamping, rapid disassembly and assembly and adaptation to requirements of different sizes of annular parts are achieved, the electroplating efficiency is remarkably improved, the uniformity of a plating layer is ensured, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of electroplating technology, and in particular to a fixture for electroplating. Background Technology

[0002] During electroplating, the plating metal or other insoluble material acts as the anode, and the part to be plated acts as the cathode. The cations of the plating metal are reduced to the plating layer on the surface of the part. Electroplating can produce decorative, protective, and various functional surface layers on mechanical products. It can also repair worn or malfunctioning workpieces. During the electroplating process, the parts are clamped and held in place using electroplating fixtures.

[0003] During the electroplating process of parts, electroplating fixtures are required. The electroplating fixtures are fixed on the crossbars of the electroplating tank to hold the workpiece to be electroplated, so as to improve the uniformity of electroplating and ensure the electroplating effect.

[0004] In actual production, some ring-shaped parts need to be electroplated. However, for some ring-shaped parts, the inner ring is too large and the size is different, making it difficult to hang them. If certain clamps are not used to fix them on both sides, it is easy to cause serious clamp marks on the surface of the parts, or it is not easy to form a plating layer, which affects the electroplating quality and results in a high defect rate and poor quality of the workpiece. Electroplating technology is relatively mature in the current technology, but for electroplating the surface of ring-shaped parts, the following problems still exist: 1. The clamping structure is fixed and cannot adapt to ring-shaped parts with different inner and outer diameters, resulting in poor versatility. Currently, electroplating of ring-shaped parts mostly uses specialized tooling, with each set only able to clamp one type of part, and strict dimensional requirements are imposed to ensure conductivity; 2. Currently, the tooling for electroplating ring-shaped parts requires clamping both surfaces of the part during clamping. The surface part is generally the working surface. Due to the isolation of the electroplating solution at the clamping point, and the presence of current dispersion by the clamp teeth, the plating layer cannot be deposited at the clamping point, thus affecting the integrity of the surface plating layer and producing clamp marks. 3. Because electroplating tanks are generally small in size and the electroplating time is long, and intervals must be made between each set of tooling, a lot of manpower and resources are wasted when only a few parts are electroplated each time.

[0005] 4. Due to the corrosive nature of some electroplating solutions, electroplating fixtures, especially those for clamping parts, will be corroded by the solution after a period of use, affecting their performance. Currently, most electroplating fixtures use threaded connections or welding. After the threaded holes are corroded by the solution, the entire fixture needs to be replaced. Welding is also not conducive to replacing fixtures. Summary of the Invention

[0006] To address the problems mentioned in the background section, the present invention provides a fixture for electroplating.

[0007] This invention discloses the following technical solution: a clamping fixture for electroplating, comprising a hook, a protective sleeve, a fixing plate, a cover plate, a first gasket, and a second gasket. The hook is connected to the protective sleeve, which has a ring-shaped structure and a mounting hole along the radial direction that mates with the hook. The fixing plate is disc-shaped with a through-hole in the center. A screw is used to fix the fixing plate through the inner hole of the fixing plate and through the protective sleeve. The outer side of the fixing plate mates with the inner side of the protective sleeve. The first gasket, the second gasket, and the cover plate are used to clamp the parts onto the fixing plate. The inner side of the cover plate mates with the inner hole of the fixing plate.

[0008] Furthermore, the hook is made of copper and is hung on the electrodes of the aqueduct during use to fix it and conduct electricity.

[0009] Furthermore, the protective sleeve is made of polytetrafluoroethylene (PTFE), and its connection with the hook and fixing plate primarily serves a fixing function.

[0010] Furthermore, the fixing plate is made of 45 steel and serves to fix, support, and conduct electricity during the electroplating process.

[0011] Furthermore, the cover plate is made of polytetrafluoroethylene (PTFE) and mainly serves to fix the parts during the electroplating process.

[0012] Furthermore, the fixing plate is provided with multiple threaded holes in the radial direction.

[0013] Compared with the prior art, the electroplating clamp of the present invention has the following advantages: 1. Through the ring clamping structure, modular design and quick positioning mechanism, it can stably clamp ring parts, quickly assemble and disassemble them and adapt to different size requirements, significantly improve electroplating efficiency, ensure coating uniformity and reduce maintenance costs; 2. Ensures the electroplating effect on the surface of the parts, and allows multiple parts to be clamped on one set of fixtures at the same time, improving work efficiency. At the same time, the shims and cover plates can be replaced according to the size of different parts to meet the clamping needs of parts with different inner ring sizes, thus increasing the scope of application. 3. When clamping the ring-shaped part, the clamping point is not on the working surface, which ensures the integrity of the coating on the surface of the ring-shaped part. The protective sleeve and cover plate are made of polytetrafluoroethylene, which can effectively isolate the current, prevent the fixture from absorbing the current, and ensure the uniform thickness of the coating on the surface of the part. 4. It is easy and flexible to adjust during use, and easy to replace. It can be used for processing various products. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the hook of the present invention; Figure 3 This is a schematic diagram of the protective sleeve of the present invention; Figure 4 This is a schematic diagram of the fixing plate of the present invention; Figure 5 This is a schematic diagram of the cover plate of the present invention; In the diagram: Hook 1, Protective cover 2, Fixing plate 3, Cover plate 4, Gasket 1 5, Gasket 2 6. Detailed Implementation

[0015] like Figures 1 to 5 As shown, a clamping fixture for electroplating includes a hook 1, a protective sleeve 2, a fixing plate 3, a cover plate 4, a first gasket 5, and a second gasket 6. The hook 1 is connected to the protective sleeve 2, which has a ring-shaped structure and a mounting hole along the radial direction to mate with the hook 1. The fixing plate 3 is disc-shaped with a through hole in the center. A screw is used to fix the fixing plate 3 by passing through the inner hole of the fixing plate 3 and through the protective sleeve 2. The outer side of the fixing plate 3 mates with the inner side of the protective sleeve 2. The first gasket 5, the second gasket 6, and the cover plate 4 are used to clamp the parts on the fixing plate 3. The inner side of the cover plate 4 mates with the inner hole of the fixing plate 3.

[0016] The hook 1 is made of copper. When in use, the hook 1 is hung on the electrode of the aqueduct to fix and conduct electricity. The protective sleeve 2 is made of polytetrafluoroethylene. The protective sleeve 2 is connected to the hook 1 and the fixing plate 3 and mainly serves to fix them. The fixing plate 3 is made of 45 steel and serves to fix, support and conduct electricity during the electroplating process. The cover plate 4 is made of polytetrafluoroethylene and mainly serves to fix the parts during the electroplating process. The fixing plate 3 has multiple threaded holes along the radial direction.

[0017] In use, first connect the hook 1 to the protective sleeve 2. The corresponding screw passes through the protective sleeve 2 and through the inner hole of the fixing plate 3 to secure the fixing plate 3. Place the part flat on the fixing plate 3, place the cover plate 4 and gaskets on top, and use screws and nuts to secure one side of the part. The gaskets and cover plate 4 tightly clamp the part onto the fixing plate 3. Repeat on the other side. Gaskets 5 and 6 are respectively placed on both sides of the fixing plate 3 to clamp parts. One fixture can clamp two parts. After the fixture is properly fitted, the pre-plating mounting of this type of ring-shaped part is complete. This fixture solves the problems of incomplete plating, fixture marks, and economic costs, while also improving the production efficiency of electroplating and meeting electroplating quality requirements.

[0018] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fixture for electroplating, characterized in that: The device includes a hook (1), a protective sleeve (2), a fixing plate (3), a cover plate (4), a first gasket (5), and a second gasket (6). The hook (1) is connected to the protective sleeve (2). The protective sleeve (2) has a ring-shaped structure and a mounting hole that mates with the hook (1) along the radial direction. The fixing plate (3) is disc-shaped and has a through-hole in the middle. The fixing plate (3) is fixed by passing a screw through the inner hole of the fixing plate (3) through the protective sleeve (2). The outer side of the fixing plate (3) mates with the inner side of the protective sleeve (2). The first gasket (5), the second gasket (6), and the cover plate (4) are used to clamp the parts on the fixing plate (3). The inner side of the cover plate (4) mates with the inner hole of the fixing plate (3).

2. The electroplating fixture according to claim 1, characterized in that: The hook (1) is made of copper.

3. The electroplating fixture according to claim 1, characterized in that: The protective sleeve (2) is made of polytetrafluoroethylene.

4. The electroplating fixture according to claim 1, characterized in that: The fixing plate (3) is made of 45 steel.

5. The electroplating fixture according to claim 1, characterized in that: The cover plate (4) is made of polytetrafluoroethylene.

6. The electroplating fixture according to claim 1, characterized in that: The fixing plate (3) has multiple threaded holes along the radial direction.

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