Hinge type local chromium plating clamp

Abstract

The utility model discloses a hinge type local chromium plating clamp which comprises a protective sleeve and a fastener, and the protective sleeve is sleeved on a non-chromium plating area of a workpiece to be subjected to chromium plating and is fastened by the fastener; the clamp has the advantages that the hinge structure on the clamp provides great convenience for repeated disassembly and assembly on the premise of ensuring the positioning accuracy of the clamp, so that the insulation protection efficiency of a non-chromium-plated area can be improved to a great extent. Meanwhile, the clamp is made of a conductive material, so that the chromium deposition phenomenon in the chromium plating boundary area of the part can be well avoided, and the chromium layer quality is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of chrome plating fixtures, specifically, it relates to a hinge-type partial chrome plating fixture. Background Technology

[0002] Chromium plating is characterized by high hardness and good wear resistance, and it has wide applications in aircraft manufacturing. Currently, for localized chromium plating of shaft parts with shoulder features, materials such as soft polyvinyl chloride film, electroplating protective adhesive, and electrical tape are generally used to insulate and protect the non-chromium-plated areas. These insulation methods are not only cumbersome and time-consuming, but also easily lead to rough chromium layers and chromium buildup at the chromium plating boundary, affecting the quality and dimensions of the chromium plating layer.

[0003] Therefore, in order to simplify the insulation protection process for locally chromium-plated parts and improve the surface quality of the chromium plating layer, through in-depth research and analysis, repeated practice, and collective efforts, a hinge-type locally chromium plating fixture was invented. This fixture can effectively improve the efficiency of insulation protection for non-chromium-plated areas and ensure the surface quality after chromium plating. Utility Model Content

[0004] In view of the above-mentioned prior art, the purpose of this utility model is to overcome the shortcomings of the prior art, adapt to the actual needs, and thus provide a hinge-type partial chrome plating fixture that can effectively improve the efficiency of insulating and protecting non-chrome-plated areas and ensure the surface quality after chrome plating.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A hinged partial chrome plating fixture includes a protective sleeve and fasteners. The protective sleeve is fitted onto the non-chrome-plated area of ​​the workpiece to be chrome-plated and is secured by the fasteners.

[0007] Furthermore, the protective sleeve includes an upper protective sleeve, a lower protective sleeve, and a rivet connecting shaft. One end of the upper protective sleeve and one end of the lower protective sleeve are rotatably connected by the rivet connecting shaft, and the other end is fixed by fasteners. The protective sleeve is fitted onto the non-chrome-plated area of ​​the workpiece to be chrome-plated through the upper and lower protective sleeves.

[0008] Furthermore, the upper protective sleeve has a semi-circular ring in the middle, with earrings and a first boss at the left and right ends of the semi-circular ring, respectively. A first baffle is provided at the rear end of the semi-circular ring. There are three earrings, which are located at the same horizontal height and are arranged parallel to each other. There is a gap between the three earrings. Each of the three earrings has a through hole in the middle for the rivet connecting shaft to pass through. There are two through holes on the first boss for fasteners to pass through. The first baffle is a thin-walled semi-circular ring.

[0009] Furthermore, the lower protective sleeve has a semi-circular ring in the middle, with lugs and a second protrusion at the left and right ends of the semi-circular ring, respectively. A second baffle is provided at the rear end of the semi-circular ring. There are two lugs, which are located at the same horizontal height and are arranged parallel to each other with a gap. Each lug has a through hole in the middle for the rivet connecting shaft to pass through. The second protrusion has two through holes for fasteners to pass through. The width of the gap between the two lugs matches the thickness of the ear ring on the upper protective sleeve. The thickness of the lugs matches the width of the gap between the three ear rings on the upper protective sleeve. The size and spacing of the two through holes on the second protrusion match the size and spacing of the two through holes on the first protrusion, respectively. The second baffle is a thin-walled semi-circular ring.

[0010] Furthermore, the rivet connecting shaft passes sequentially from front to back through the through hole of the earring at the front end, the through hole of the lug at the front end, the through hole of the earring at the middle end, the through hole of the lug at the rear end, and the through hole of the earring at the rear end, rotatably connecting one end of the upper protective sleeve and one end of the lower protective sleeve.

[0011] Furthermore, the fasteners are bolts and nuts. The bolts pass through two through holes on the first boss and two through holes on the second boss and are fitted onto the nuts to fasten the other end of the upper protective sleeve and the other end of the lower protective sleeve.

[0012] Furthermore, the semi-circular ring structure in the middle of the upper protective sleeve has the same shape and size as the semi-circular ring structure in the middle of the lower protective sleeve, and the first baffle has the same shape and size as the second baffle. The protective sleeve is fitted onto the non-chrome-plated area of ​​the workpiece to be chrome-plated through the semi-circular rings in the middle of the upper and lower protective sleeves, and the first and second baffles are fitted onto the root of the chrome-plated area of ​​the workpiece to be chrome-plated.

[0013] Furthermore, it also includes a protective nut, which is fitted onto the threaded area of ​​the workpiece to be chrome-plated.

[0014] Furthermore, the inner diameter of the thread of the protective nut matches the outer diameter of the thread of the workpiece to be chrome-plated, and the outer diameter of the protective nut is slightly larger than the outer diameter of the chrome-plating area of ​​the workpiece immediately adjacent to it.

[0015] Furthermore, when the upper and lower protective sleeves are closed, the semi-circular rings of the upper and lower protective sleeves form a complete circular hole. The diameter of this circular hole is larger than the outer dimensions of the non-chrome-plated area of ​​the workpiece to be chrome-plated, and the length of this circular hole is larger than the length of the non-chrome-plated area of ​​the workpiece to be chrome-plated. The thin-walled semi-circular rings of the first and second baffles form a complete circular hole. The diameter of this circular hole is larger than the outer diameter of the chrome-plated area of ​​the workpiece to be chrome-plated, and the inner end face of the circular hole is tightly fitted to the root of the chrome-plated area of ​​the workpiece to be chrome-plated.

[0016] In this invention, the protective cover is a protective cover with a hinge function.

[0017] In this invention, the core structure of the fixture is a protective sleeve. The hinge protective sleeve is simple to use; simply open it, load the part into the fixture, close it, and tighten the sleeve with bolts and nuts. This completes the insulation protection for the workpiece's shoulder area (non-chrome-plated area). Next, a protective nut is placed on the workpiece to achieve insulation protection for the threaded area. Finally, copper wire is used for binding or copper hooks are welded on for hanging, and then chrome plating can begin.

[0018] To ensure proper mounting and conductivity during chrome plating, and to guarantee the quality of the chrome plating layer at the chrome plating boundary, the protective nuts and sleeves should be made of materials with good electrical conductivity.

[0019] The beneficial effects of this invention are as follows: the hinge structure on the fixture provides great convenience for repeated assembly and disassembly while ensuring its own positioning accuracy, thus greatly improving the efficiency of insulation protection for non-chrome-plated areas. At the same time, the use of conductive materials for the fixture effectively avoids chrome buildup at the chrome-plated boundary areas of the parts, ensuring the quality of the chrome layer. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the protective sleeve of this utility model.

[0022] Wherein: 1 is the protective sleeve, 2 is the protective nut, 3 is the workpiece to be chrome plated, 4 is the bolt, 5 is the nut, 6 is the upper protective sleeve, 7 is the lower protective sleeve, 8 is the rivet connecting shaft, 9 is the lug, 10 is the first boss, 11 is the lug, 12 is the second boss, 13 is the first baffle, and 14 is the second baffle. Detailed Implementation

[0023] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0024] In the description of this application, it should be noted that the terms "center / part", "upper", "lower", "left", "right", "front", "middle", "rear", "inner", "outer", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] Furthermore, it should be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "equipped with," "sleeved in," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] It should also be understood that the terms "comprising / including," "consisting of," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements includes not only those elements but may also include, where necessary, other elements not expressly listed, or elements inherent to such a product, apparatus, process, or method. Without further limitations, an element defined by the phrases "comprising / including," "consisting of," does not exclude the presence of additional identical elements in the product, apparatus, process, or method that includes said element. Example

[0028] like Figures 1 to 2As shown, this utility model discloses a hinge-type partial chrome-plated clamp, including a protective sleeve 1, a protective nut 2, a bolt 4, and a nut 5. The protective sleeve 1 includes an upper protective sleeve 6, a lower protective sleeve 7, and a rivet connecting shaft 8. The upper protective sleeve 6 has a semi-circular ring in the middle, with ear rings 9 and a first boss 10 at its left and right ends. A first baffle 13 is provided at the rear end of the semi-circular ring in the middle of the upper protective sleeve 6. There are three ear rings 9, all at the same horizontal level and parallel to each other, with gaps between them. Each ear ring 9 has a through hole in its middle for the rivet connecting shaft 8 to pass through. The first boss 10 has two through holes for the bolt 5 to pass through. The lower protective sleeve 7 has a semi-circular ring in the middle, and the lower... The lower protective sleeve 7 has lugs 11 and second protrusions 12 at the left and right ends of the semi-circular ring in the middle. A second baffle 14 is located at the rear end of the semi-circular ring in the middle of the lower protective sleeve 7. Two lugs 11 are provided, located at the same horizontal height, and are arranged parallel to each other with a gap. Each lug 11 has a through hole in its middle for the rivet connecting shaft 8 to pass through. The second protrusion 12 has two through holes for the bolts 5 to pass through. The width of the gap between the two lugs 11 matches the thickness of the earrings 9 on the upper protective sleeve 6. The thickness of the lugs 11 matches the width of the gap between the three earrings 9 on the upper protective sleeve 6. The size and spacing of the two through holes on the second protrusion 12 match the size and spacing of the two through holes on the first protrusion 10. The connecting shaft 8 passes sequentially from front to back through the through hole of the earring 9 located at the front left side of the upper protective sleeve 6, the through hole of the lug 11 located at the front left side of the lower protective sleeve 7, the through hole of the earring 9 located at the middle left side of the upper protective sleeve 6, the through hole of the lug 11 located at the rear left side of the lower protective sleeve 7, and the through hole of the earring 9 located at the rear left side of the upper protective sleeve 6, rotatably connecting one end of the upper protective sleeve 6 and one end of the lower protective sleeve 7. The upper protective sleeve 6 can rotate up and down relative to the lower protective sleeve 7. The bolt 4 passes through two through holes on the first boss 10 and two through holes on the second boss 12 and is fitted onto the nut 5 to fasten the other end of the upper protective sleeve 6 and the other end of the lower protective sleeve 7. Both the upper protective sleeve 6 and the lower protective sleeve 7 are fitted onto the chrome-plated part through a semi-circular ring in their middle. For the non-chrome-plated area of ​​workpiece 3, both the first baffle 13 and the second baffle 14 are fitted with thin-walled semi-circular rings at the root of the chrome-plated area of ​​workpiece 3, with the inner end face of the thin-walled semi-circular rings tightly fitting the root end face of the chrome-plated area of ​​workpiece 3. When the upper protective sleeve 6 and the lower protective sleeve 7 are closed, the semi-circular rings of the upper protective sleeve 6 and the lower protective sleeve 7 form a complete circular hole. The diameter of this circular hole is larger than the outer dimensions of the non-chrome-plated area of ​​workpiece 3, and the length of this circular hole is larger than the length of the non-chrome-plated area of ​​workpiece 3. The thin-walled semi-circular rings of the first baffle 13 and the second baffle 14 form a complete circular hole with a diameter slightly larger than the outer diameter of the chrome-plated area of ​​workpiece 3.Furthermore, the inner end face of the circular hole is tightly fitted with the end face of the root of the chrome-plating area of ​​the workpiece 3 to be chrome-plated; the shape and size of the first boss 10 are the same as the shape and size of the second boss 12; the shape and size of the semi-circular ring structure in the middle of the upper protective sleeve 6 are the same as the shape and size of the semi-circular ring structure in the middle of the lower protective sleeve 7; the shape and size of the thin-walled semi-circular ring structure of the first baffle 13 are the same as the shape and size of the thin-walled semi-circular ring structure of the second baffle 14; the bottom end face of the first boss 10 is flush with the plane of the bottom of the semi-circular ring in the middle of the upper protective sleeve 6; the top end face of the second boss 12 is flush with the plane of the top of the semi-circular ring in the middle of the lower protective sleeve 7; the protective nut 2 is fitted onto the threaded area of ​​the workpiece 3 to be chrome-plated; the inner wall of the protective nut 2 is provided with an internal thread that matches the external thread of the threaded area of ​​the workpiece 3 to be chrome-plated; the outer diameter of the protective nut 2 is slightly larger than the outer diameter of the adjacent chrome-plated area.

[0029] Preferably, the outer diameter of the circular hole on the protective sleeve 1 and the outer diameter of the protective nut 2 are both close to the size of the chromium plating area of ​​the workpiece 3 to be chromium plating.

[0030] Preferably, the inner diameter of the thread of the protective nut 2 matches the outer diameter of the thread in the threaded area of ​​the workpiece 3 to be chrome plated.

[0031] Preferably, the two through holes on the first boss 10 and the two through holes on the second boss 12 are both bolt holes.

[0032] Preferably, the protective cover 1 is a protective cover with a hinge function.

[0033] In this invention, both the protective nut 2 and the protective sleeve 1 are made of materials with good electrical conductivity.

[0034] In this invention, the core structure of the fixture is a protective sleeve, which not only protects the non-chrome-plated areas of parts with complex shapes and structures but also enables rapid positioning and disassembly. When the protective sleeve is placed on the part, the circular holes on the sleeve fit precisely against the outer circumference of the part's base, quickly achieving protection of the non-chrome-plated areas.

[0035] The method of using this utility model is as follows: (Refer to...) Figure 1 First, place the workpiece 3 to be chrome-plated in the protective sleeve 1 and close the protective sleeve. Then, install the bolt 4 and nut 5 and tighten them. Finally, screw the protective nut 2 onto the thread of the workpiece 3 to be chrome-plated to complete the protection of the non-chrome-plated area of ​​the workpiece 3 to be chrome-plated.

[0036] The precautions for this utility model are as follows:

[0037] 1. To provide good insulation protection for the non-chrome-plated areas of the workpiece 3 to be chrome-plated, the inner hole of the protective sleeve 1 must fit tightly with the outer circle of the workpiece 3, requiring high precision. After chrome plating, the outer circle of the workpiece increases in size; the hinge structure effectively avoids the problem of the fixture being unable to be disassembled due to the increased outer circle size. The workpiece can be removed by simply removing the protective sleeve 1 without causing damage.

[0038] 2. To ensure the uniformity of the chrome plating thickness, the outer diameters of the protective sleeve 1 and the protective nut 2 should be as close as possible to the size of the chrome plating area of ​​the workpiece 3 to be chrome plated.

[0039] 3. When the protective sleeve 1 is used multiple times and the hole is slightly worn, the surface can be ground flat, and the inner hole can be precisely machined after closing the protective sleeve 1 to enable the fixture to be used again.

[0040] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A hinge-type partially chrome-plated clamp, characterized in that: It includes a protective sleeve and fasteners. The protective sleeve is placed over the non-chrome-plated area of ​​the workpiece to be chrome-plated and is secured with fasteners.

2. The hinge-type partial chrome-plated clamp according to claim 1, characterized in that: The protective sleeve includes an upper protective sleeve, a lower protective sleeve, and a rivet connecting shaft. One end of the upper protective sleeve and one end of the lower protective sleeve are rotatably connected by the rivet connecting shaft, and the other end is fixed by fasteners. The protective sleeve is fitted onto the non-chrome-plated area of ​​the workpiece to be chrome-plated by the upper and lower protective sleeves.

3. The hinge-type partial chrome-plated clamp according to claim 1, characterized in that: The upper protective sleeve has a semi-circular ring in the middle. The left and right ends of the semi-circular ring are respectively provided with earrings and a first boss. The rear end of the semi-circular ring is provided with a first baffle. There are three earrings, which are located at the same horizontal height and are arranged parallel to each other. There is a gap between the three earrings. The middle of each of the three earrings is provided with a through hole for the rivet connecting shaft to pass through. The first boss is provided with two through holes for fasteners to pass through. The first baffle is a thin-walled semi-circular ring.

4. The hinge-type partial chrome-plated clamp according to claim 3, characterized in that: The lower protective sleeve has a semi-circular ring in the middle, with lugs and a second protrusion at the left and right ends of the semi-circular ring, respectively. A second baffle is provided at the rear end of the semi-circular ring. There are two lugs at the same horizontal height, which are parallel to each other and have a gap. Each lug has a through hole in the middle for the rivet connecting shaft to pass through. The second protrusion has two through holes for fasteners to pass through. The width of the gap between the two lugs matches the thickness of the ear ring on the upper protective sleeve. The thickness of the lugs matches the width of the gap between the three ear rings on the upper protective sleeve. The size and spacing of the two through holes on the second protrusion match the size and spacing of the two through holes on the first protrusion, respectively. The second baffle is a thin-walled semi-circular ring.

5. The hinge-type partial chrome-plated clamp according to claim 4, characterized in that: The rivet connecting shaft passes through the through hole of the earring at the front end, the through hole of the lug at the front end, the through hole of the earring at the middle end, the through hole of the lug at the rear end, and the through hole of the earring at the rear end in sequence from front to back, rotatably connecting one end of the upper protective sleeve and one end of the lower protective sleeve.

6. The hinge-type partial chrome-plated clamp according to claim 4, characterized in that: The fasteners are bolts and nuts. The bolts pass through two through holes on the first boss and two through holes on the second boss and are fitted onto the nuts to fasten the other end of the upper protective sleeve and the other end of the lower protective sleeve.

7. The hinge-type partial chrome-plated clamp according to claim 4, characterized in that: The semi-circular ring structure in the middle of the upper protective sleeve has the same shape and size as the semi-circular ring structure in the middle of the lower protective sleeve. The first baffle has the same shape and size as the second baffle. The protective sleeve is fitted onto the non-chrome-plated area of ​​the workpiece to be chrome-plated through the semi-circular rings in the middle of the upper and lower protective sleeves, and the first and second baffles are fitted onto the root of the chrome-plated area of ​​the workpiece to be chrome-plated.

8. The hinge-type partial chrome-plated clamp according to claim 1, characterized in that: It also includes a protective nut, which is fitted onto the threaded area of ​​the workpiece to be chrome plated.

9. The hinge-type partial chrome-plated clamp according to claim 8, characterized in that: The inner diameter of the thread of the protective nut matches the outer diameter of the thread of the workpiece to be chrome-plated, and the outer diameter of the protective nut is larger than the outer diameter of the chrome-plating area of ​​the workpiece immediately adjacent to it.

10. The hinge-type partial chrome-plated clamp according to claim 4, characterized in that: When the upper and lower protective sleeves are closed, the semi-circular rings of the upper and lower protective sleeves form a complete circular hole. The diameter of this circular hole is larger than the outer dimensions of the non-chrome-plated area of ​​the workpiece to be chrome-plated, and the length of this circular hole is larger than the length of the non-chrome-plated area of ​​the workpiece to be chrome-plated. The thin-walled semi-circular rings of the first and second baffles form a complete circular hole. The diameter of this circular hole is larger than the outer diameter of the chrome-plated area of ​​the workpiece to be chrome-plated, and the inner end face of the circular hole is tightly fitted to the root of the chrome-plated area of ​​the workpiece to be chrome-plated.

Images