CN211079384U - Expansion plug for protecting finish machining hole of electroplated part - Google Patents
Expansion plug for protecting finish machining hole of electroplated part Download PDFInfo
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- CN211079384U CN211079384U CN201922122493.7U CN201922122493U CN211079384U CN 211079384 U CN211079384 U CN 211079384U CN 201922122493 U CN201922122493 U CN 201922122493U CN 211079384 U CN211079384 U CN 211079384U
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- rubber plug
- hole
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- electroplating
- machining hole
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Abstract
The utility model belongs to the technical field of electroplating protection, a expand stopper in electroplating part protection finish machining hole is related to. The expansion plug comprises a cap nut, a flat head bolt, a rubber plug, a washer and a thin rod. The excircle of the rubber plug is in clearance fit with a finish machining hole of the electroplating part, and a hollow hole and a drilling hole are arranged at the axial center of the rubber plug; the rubber plug is arranged in the finish machining hole, the flat-head bolt penetrates through the hollow hole of the rubber plug to penetrate out of the other end of the hollow hole of the rubber plug, and the gasket is fixed on the drilling hole of the rubber plug; the cap nut is rotationally fixed at one end of the flat head bolt, the thin rod is vertically welded at the other end of the cap nut, the nut is screwed tightly, and the rubber plug is made of medium-hardness rubber. The end face of the flat-head bolt is provided with a cross. The utility model has simple structure, low cost and good reliability; the protection problem of electroplating the part is solved, the finish machining hole on the electroplating part is protected, and electroplating liquid is prevented from entering the finish machining hole.
Description
Technical Field
The utility model belongs to the technical field of electroplating protection, a expand stopper in electroplating part protection finish machining hole is related to.
Background
Electroplating is a process of plating a thin layer of other metals or alloys on the surface of some metals by using the principle of electrolysis, and is a process of attaching a layer of metal film on the surface of a metal or other material product by using the action of electrolysis, thereby having the effects of preventing metal oxidation (such as corrosion), improving wear resistance, conductivity, light reflection, corrosion resistance (such as copper sulfate and the like), enhancing the appearance and the like.
The working principle of electroplating is shown in figure 1. Electroplating requires a low-voltage high-current power supply for supplying power to the electroplating bath and an electrolysis device consisting of an electroplating solution, a part to be plated (cathode) and an anode. The electroplating liquid has different components depending on the plating layer, but contains main salt for providing metal ion, complexing agent capable of complexing metal ion in the main salt to form complex, buffering agent for stabilizing pH value of the solution, anode activator and special additive, such as brightening agent, crystal grain refiner, leveling agent, wetting agent, stress eliminating agent, fog inhibitor, etc. The electroplating process is a process that metal ions in the plating solution are reduced into metal atoms through electrode reaction under the action of an external electric field, and metal deposition is carried out on a cathode. Therefore, the method is a metal electrodeposition process comprising the steps of liquid phase mass transfer, electrochemical reaction, electric crystallization and the like.
The low-pressure valve and the pipe fittings are made of black heart malleable cast iron materials, and the fittings need to be electroplated for corrosion resistance, decoration, beauty and selling price. During electroplating, the parts are immersed in the plating solution, and a suitable protecting member is required in order to protect the fine-drilled holes in the parts from the plating solution, that is, the fine-drilled holes in the forgeable piece so as not to erode the plating solution. If the protection is not good, the finished hole is eroded by the electroplating solution, the size of the finished hole is reduced, the finished hole is corroded, and batch scrap of parts can be caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an expansion plug for protecting a finish machining hole of an electroplating part. During electroplating of the parts, the expansion plug can protect the precision of a finish machining hole on the parts, prevent electroplating solution from entering and prevent the electroplating solution from corroding.
The technical scheme of the utility model as follows:
the expansion plug for protecting the finish machining hole of the electroplated part comprises a cap nut, a flat-head bolt, a rubber plug, a washer and a thin rod.
The excircle of the rubber plug is in clearance fit with a finish machining hole of the electroplating part, and a hollow hole and a drilling hole are arranged at the axial center of the rubber plug; the rubber plug is arranged in the finish machining hole, the flat-head bolt penetrates through the hollow hole of the rubber plug to penetrate out of the other end of the hollow hole of the rubber plug, and the gasket is fixed on the drilling hole of the rubber plug; the cap nut is fixed at one end of the flat-head bolt in a rotating mode, and the thin rod is vertically welded at the other end of the cap nut to tighten the nut.
Further, the rubber plug is made of rubber with medium hardness. The end face of the flat-head bolt is provided with a cross.
The utility model discloses following beneficial effect has:
the expansion plug for protecting the finish machining hole of the electroplating part has simple structure, low cost and good reliability; the protection problem of electroplating the part is solved, the finish machining hole on the electroplating part is protected, and electroplating liquid is prevented from entering the finish machining hole.
Drawings
FIG. 1 is a schematic diagram of an electroplating operation.
FIG. 2 is a schematic view of a rubber expansion plug protecting a finished hole.
In the figure: 1, a cap nut; 2, a flat head bolt; 3, rubber plugs; 4, a gasket; 5 thin rods.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific implementations described herein.
The expansion plug for protecting the finish machining hole of the electroplated part comprises a cap nut 1, a flat head bolt 2, a rubber plug 3, a washer 4 and a thin rod 5;
the excircle of the rubber plug 3 is in clearance fit with a finish machining hole of the electroplating part, and a hollow hole and a drilling hole are arranged at the axial center of the rubber plug 3; the rubber plug 3 is arranged in the finish machining hole, the flat-head bolt 2 penetrates through the hollow hole of the rubber plug 3 to penetrate out of the other end of the hollow hole, and the gasket 4 is fixed on the drilling hole of the rubber plug 3; the cap nut 1 is rotationally fixed at one end of the flat head bolt 2, and the thin rod 5 is vertically welded at the other end of the cap nut 1 to screw the nut.
The utility model discloses a use method:
a medium hardness rubber plug 3 is inserted into the finished hole, a flush bolt 2 is inserted, and a washer 4 is added. And welding a thin rod 5 on the cap nut 1, and screwing the nut. Because the rubber plug 3 is axially pressed by the taper of the flat-head bolt and the nut 1, the rubber plug 3 generates serious axial compression deformation, the outer circle of the plug 3 is forced to expand, no gap exists in the finish machining hole, and any ions in the electroplating solution can not enter. Thus, electroplating is performed. After the electroplating is finished, the nut 1 is loosened through the thin rod 5, the flat-head bolt 2 is taken out, the plug 3 is restored to the original state and is in clearance fit with a fine machining hole, and the rubber plug 3 is easily taken out.
Claims (3)
1. The expansion plug for protecting the finish machining hole of the electroplated part is characterized by comprising a cap nut (1), a flat-head bolt (2), a rubber plug (3), a gasket (4) and a thin rod (5);
the excircle of the rubber plug (3) is in clearance fit with a finish machining hole of the electroplating part, and a hollow hole and a drilling hole are arranged at the axial center of the rubber plug (3); the rubber plug (3) is arranged in the finish machining hole, the flat-head bolt (2) penetrates through the hollow hole of the rubber plug (3) to penetrate out of the other end of the hollow hole, and the gasket (4) is fixed on the drilling hole of the rubber plug (3); the cap nut (1) is rotationally fixed at one end of the flat head bolt (2), and the thin rod (5) is vertically welded at the other end of the cap nut (1).
2. An expansion plug for the protection of finished holes in plated parts, according to claim 1, characterized in that said rubber plug (3) is made of medium-hardness rubber.
3. An expansion plug for protecting a finishing hole of a plated part according to claim 1 or 2, characterized in that the end face of said grub bolt (2) is provided with a cross.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922122493.7U CN211079384U (en) | 2019-12-02 | 2019-12-02 | Expansion plug for protecting finish machining hole of electroplated part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922122493.7U CN211079384U (en) | 2019-12-02 | 2019-12-02 | Expansion plug for protecting finish machining hole of electroplated part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211079384U true CN211079384U (en) | 2020-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922122493.7U Active CN211079384U (en) | 2019-12-02 | 2019-12-02 | Expansion plug for protecting finish machining hole of electroplated part |
Country Status (1)
| Country | Link |
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| CN (1) | CN211079384U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112376093A (en) * | 2020-11-20 | 2021-02-19 | 贵州新安航空机械有限责任公司 | Chemical nickel plating and electroplating protection tool for oil inlet filler neck |
| CN113755920A (en) * | 2021-09-29 | 2021-12-07 | 上海交通大学 | Aluminum alloy anodic oxidation tool for through-hole workpiece |
-
2019
- 2019-12-02 CN CN201922122493.7U patent/CN211079384U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112376093A (en) * | 2020-11-20 | 2021-02-19 | 贵州新安航空机械有限责任公司 | Chemical nickel plating and electroplating protection tool for oil inlet filler neck |
| CN113755920A (en) * | 2021-09-29 | 2021-12-07 | 上海交通大学 | Aluminum alloy anodic oxidation tool for through-hole workpiece |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20230829 Address after: No. 4 Fushan Avenue, Jingjinzhouhe Science and Technology Industrial Park, Jizhou District, Tianjin, 300000 Patentee after: Tianjin wals Technology Co.,Ltd. Address before: No.26, Mingxin Middle Road, Wujin District, Changzhou City, Jiangsu Province Patentee before: CHANGZHOU INSTITUTE OF MECHATRONIC TECHNOLOGY |