Clamp for locally plating chromium on inner surface and outer surface

Abstract

The utility model relates to a chromium plating clamp, in particular to a local chromium plating clamp for inner and outer surfaces. A clamp for locally plating chromium on inner and outer surfaces is suitable for electroplating a very thin chromium layer, and comprises a screw, a cover and a nut, the screw comprises a threaded section and an end attached to the inner surface of a to-be-chromed part, and when the screw is plugged into an inner hole of the part, the threaded section penetrates out of the inner hole of the part. One end of the cover is provided with a through hole through which the threaded section penetrates, and the inner surface of the other end is attached to a non-chromium-plated area of the outer surface of the to-be-chromium-plated part; the nut is matched with the threaded section of the screw. The utility model has the following advantages: insulation protection can be quickly and accurately carried out on non-chromium-plated areas of inner and outer holes of a part, and convenience is provided for repeated disassembly and assembly; under the condition that the size of the clamp is guaranteed, the insulation protection range of a non-chromium-plating area is accurate, and the requirement for a chromium-plating area of a part is guaranteed.

Description

Technical Field

[0001] This utility model relates to a chrome-plated clamp, particularly a clamp with partial chrome plating on the inner and outer surfaces. Background Technology

[0002] To meet usage requirements, both the inner and outer surfaces of the bushing parts need to be locally chrome-plated. Traditional chrome-plated insulating materials such as soft PVC film, electrical tape, and electroplating protective adhesive cannot provide localized protection for the inner surface of the parts, and providing localized insulation protection for the outer surface of the parts also suffers from drawbacks such as cumbersome operation and low insulation efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a fixture for partial chrome plating on the inner and outer surfaces, which can achieve rapid and accurate insulation protection for the inner and outer surfaces of parts, while ensuring the accuracy of the chrome plating area on the inner and outer surfaces of parts.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a fixture for partial chromium plating of inner and outer surfaces, suitable for electroplating very thin chromium layers, the fixture including a screw, a cap, and a nut; the screw includes a threaded section and an end that fits against the inner surface of the part to be chromium plating, and when the screw is inserted into the inner hole of the part, the threaded section protrudes out of the inner hole of the part; one end of the cap has a through hole for the threaded section to pass through, and the inner surface of the other end fits against the non-chromium plating area of ​​the outer surface of the part to be chromium plating; the nut is adapted to the threaded section of the screw.

[0005] Preferably, the screw is a hollow screw.

[0006] Preferably, the screws are made of non-conductive, corrosion-resistant, and high-temperature-resistant materials.

[0007] Preferably, the cover and nut are made of a metal material with good electrical conductivity.

[0008] Preferably, the clamp further includes a copper hook, which is installed between the cover and the nut and serves to hang and conduct electricity.

[0009] Preferably, one end of the copper hook is provided with a handle and the other end is provided with a clamping part, and the clamping part has a hole for the threaded section to pass through.

[0010] Preferably, the size of the end of the screw that is in contact with the inner surface of the part to be chrome-plated is the same as the size of the non-chrome-plated area on the inner surface of the part.

[0011] Working principle: The fixture mainly uses hollow round-head screws to insulate and protect the non-chrome-plated areas of the part's inner hole, and round caps to insulate and protect the non-chrome-plated areas of the part's outer surface. By attaching copper hooks and securing them with nuts, it can quickly achieve insulation protection and mounting of the non-chrome-plated areas of the part, improving the efficiency and accuracy of insulation protection.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. It can quickly and accurately provide insulation protection for the non-chrome-plated areas of the inner and outer holes of parts, facilitating repeated disassembly and assembly;

[0014] 2. While ensuring the dimensions of the fixture itself, the insulation protection range for non-chrome-plated areas is accurate, thus ensuring the requirements for chrome-plated areas of the parts. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the hollow round head screw structure in an embodiment of this utility model;

[0017] Figure 3 This is a schematic diagram of the circular cover structure in an embodiment of this utility model;

[0018] Figure 4 This is a schematic diagram of the copper hook structure in an embodiment of this utility model;

[0019] Figure 5 This is a schematic diagram of the nut structure in an embodiment of this utility model;

[0020] Figure 1-5 In the middle, 1. Hollow round head screw; 2. Part to be chrome plated; 3. Round cap; 4. Copper hook; 5. Nut. Detailed Implementation

[0021] It should be noted that the terms "inner," "outer," "upper," and "lower," etc., are used to describe the situation as shown in the accompanying drawings or in conventional use, and do not constitute a limitation on this utility model. Those skilled in the art should understand them in accordance with the technical solution of this utility model.

[0022] The following is in conjunction with the appendix Figure 1-5 The present invention is further described in detail as follows: A clamp for partial chromium plating on the inner and outer surfaces, suitable for electroplating a very thin chromium layer, comprising: a hollow round-head screw 1, a round cap 3, a copper hook 4, and a nut 5.

[0023] Specifically,

[0024] like Figure 2 , 5 As shown, the hollow round head screw includes a threaded section and an end that fits against the inner surface of the part 2 to be chrome-plated; the threaded section is adapted to the nut 5; the size of the end that fits against the inner surface of the part to be chrome-plated is consistent with the size of the non-chrome-plated area of ​​the inner surface of the part, thereby providing insulation protection for the non-chrome-plated area of ​​the inner hole of the part.

[0025] like Figure 3As shown, one end of the round cover 3 has a through hole for the threaded section to pass through, and the inner surface of the other end is in contact with the non-chrome-plated area of ​​the outer surface of the part to be chrome-plated, thereby providing insulation protection for the non-chrome-plated area of ​​the outer surface of the part; in order to ensure the uniformity of the chrome plating layer thickness, the outer diameter of the round cover 3 should be as close as possible to the size of the chrome-plated area of ​​the part.

[0026] like Figure 4 As shown, the copper hook 4 has a handle at one end and a clamping part at the other end, with a hole on the clamping part to allow the threaded section to pass through. By fitting the copper hook 4 onto the part and securing it with the nut 5, insulation protection and mounting of non-chrome-plated areas of the parts can be quickly achieved, improving the efficiency and accuracy of insulation protection.

[0027] The dimensions of the hollow round-head screw 1 and the round cap 3 are determined based on the extent of the non-chrome-plated area of ​​the part. The screw in the fixture is designed to be hollow to ensure the flow of the plating solution during the electroplating process. To prevent short circuits caused by the anode introduced into the inner hole of the part contacting the part or the fixture, the hollow round-head screw 1 should be made of a non-conductive, corrosion-resistant, and high-temperature-resistant material such as polytetrafluoroethylene (PTFE). Inserting the anode into the hole in the center of the screw prevents it from contacting the part. To ensure good conductivity during chrome plating, the round cap 3 and the nut 5 should be made of highly conductive metal materials.

[0028] To provide good insulation protection for the non-chrome-plated areas of the part, both the hollow round-head screws and the round caps should fit tightly against the surface of the part. To prevent the fixture from becoming unremovable due to the increased dimensions of the inner and outer surfaces of the part after chrome plating, this fixture is generally suitable for use when electroplating a very thin chrome layer.

[0029] How to use:

[0030] Before chrome plating, a hollow round-head screw 1 is inserted into the inner hole of the part 2 to be chrome-plated, thus completing the insulation protection of the non-chrome-plated area on the inner surface. Next, a round cap 3 and a copper hook 4 are sequentially inserted through the thread of the hollow round-head screw 1 and tightened with a nut 5. The round cap 5 provides insulation protection for the non-chrome-plated area on the outer surface of the part, while the copper hook 4 serves as a mounting and conductive element. Chrome plating can then begin by introducing an anode into the inner hole of the part.

[0031] The above embodiments are merely preferred embodiments of this utility model and do not constitute a limitation thereof. Any extensions, modifications, etc., made by those skilled in the art without departing from the principle of this utility model should be included within the protection scope of this utility model.

Claims

1. A fixture with partial chrome plating on both inner and outer surfaces, characterized in that: The fixture includes a screw, a cap, and a nut; the screw includes a threaded section and an end that fits against the inner surface of the part to be chrome-plated, and when the screw is inserted into the inner hole of the part, the threaded section protrudes out of the inner hole of the part; one end of the cap has a through hole for the threaded section to pass through, and the inner surface of the other end fits against the non-chrome-plated area of ​​the outer surface of the part to be chrome-plated; the nut is adapted to the threaded section of the screw.

2. The fixture with partial chrome plating on the inner and outer surfaces according to claim 1, characterized in that: The screw is a hollow screw.

3. The fixture with partial chrome plating on the inner and outer surfaces according to claim 1, characterized in that: The screws are made of non-conductive, corrosion-resistant, and high-temperature-resistant materials.

4. The fixture with partial chrome plating on the inner and outer surfaces according to claim 1, characterized in that: The cap and nut are made of a highly conductive metal material.

5. The fixture with partial chrome plating on the inner and outer surfaces according to claim 1, characterized in that: The clamp also includes a copper hook, which is installed between the cover and the nut and serves to hang and conduct electricity.

6. The fixture with partial chrome plating on the inner and outer surfaces according to claim 5, characterized in that: The copper hook has a handle at one end and a clamping part at the other end, with a hole on the clamping part to allow the threaded section to pass through.

7. The fixture with partial chrome plating on the inner and outer surfaces according to claim 1, characterized in that: The dimensions of the end of the screw that contacts the inner surface of the part to be chrome-plated are the same as the dimensions of the non-chrome-plated area on the inner surface of the part.

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