Deep threaded hole protection clamp applied to anodic oxidation treatment

Abstract

The utility model discloses a deep threaded hole protection clamp applied to anodic oxidation treatment, which comprises a body and an operating mechanism, a vent groove is arranged in the middle of the body and used for natural circulation of solution or overflow of gas at a deep hole, and external threads are arranged on the outer side of the body along the circumferential direction; the operating mechanism comprises a first operating rod and a second operating rod, one end of the first operating rod is hinged to one end of the second operating rod, and a spring is arranged between the first operating rod and the second operating rod; the free ends of the first operating rod and the second operating rod extend into the vent groove and are engaged and clamped with the inner wall of the vent groove; the body is made of polytetrafluoroethylene materials, and the first operating rod and the second operating rod are respectively made of aluminum alloy. According to the utility model, low-cost and high-efficiency protection is carried out on the threaded area, which does not need anodizing, at the deep hole of the part through the protection clamp. Meanwhile, the possibility that a surface film layer is damaged due to machining operation after the part is oxidized is eliminated, the air bag phenomenon existing in the anodic oxidation process of the deep-hole threaded part is reduced, the field production efficiency is greatly improved, the production cost is saved, and good practicability is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fixtures for surface treatment of parts, and in particular relates to a protective fixture for deep threaded holes used in anodizing treatment. Background Art

[0002] The application of aluminum and aluminum alloys in aviation, aerospace, automobile and other fields is increasing day by day. However, due to the poor corrosion resistance and wear resistance of aluminum and aluminum alloys, surface treatment of aluminum and aluminum alloys is usually required to improve their corrosion resistance and achieve the purpose of safe service. Common surface treatment methods for aluminum and aluminum alloys in production include sulfuric acid anodizing, porcelain anodizing, chromic acid anodizing, hard anodizing, etc. However, during the anodizing process, due to design performance requirements or process requirements, it is sometimes necessary to shield local areas of the parts. In the traditional processing technology, the entire part is first anodized, and then mechanical processing operations are performed to remove the oxide film on the surface of the part that does not need to be protected. This method is prone to damage the oxide film layer, resulting in a long production cycle and high cost of parts, and causes a large number of parts to be repaired, reworked, or even scrapped.

[0003] For the protection of parts with deep-hole threaded structures, glue protection or metal screw protection is traditionally used. The former is inefficient, the glue is unevenly applied, the deviation is large, and it is not completely removed after anodizing; the latter metal screws will participate in the oxidation reaction during the anodizing process, resulting in the metal screws having dimensional deviations after anodizing, which is difficult to disassemble and difficult to use again to protect the thread. In addition, general nuts mainly focus on the thread protection of parts, ignoring the deep-hole thread protection, which will cause the "air bag" phenomenon during the anodizing process, resulting in a thin film layer in the "air bag" area or even no film layer, affecting the delivery qualification rate of parts, resulting in an increase in production costs, and also increasing the labor intensity of on-site workers. Utility Model Content

[0004] The utility model aims to provide a protective clamp for deep threaded holes used in anodizing treatment, aiming to solve the above-mentioned problems.

[0005] The utility model is mainly realized through the following technical solutions:

[0006] A protective clamp for deep threaded holes used for anodizing treatment comprises a body and an operating mechanism, wherein a ventilation groove is provided in the middle of the body for natural circulation of solution or overflow of gas in the deep hole, and an external thread is provided on the outer side of the body along the circumferential direction; the operating mechanism comprises a first operating rod and a second operating rod, one end of the first operating rod and the second operating rod are hinged, and a spring is provided between the first operating rod and the second operating rod; the free ends of the first operating rod and the second operating rod extend into the ventilation groove and fit and engage with the inner wall of the ventilation groove; the body is made of polytetrafluoroethylene material, and the first operating rod and the second operating rod are respectively made of aluminum alloy.

[0007] In order to better realize the utility model, further, the main body includes an elastic bushing, an inner liner tube and a plurality of threaded petals, the elastic bushing is provided with a plurality of threaded petals along the circumference, and the outer sides of the plurality of threaded petals are provided with external threads; the inner liner tube is sleeved and installed in the elastic bushing, and the elastic bushing is extended from the top of the inner liner tube and is provided with a sealing ring, and a ventilation groove is provided in the middle of the inner liner tube.

[0008] In order to better realize the utility model, further, a plurality of thread petals are clamped on the circumferential side of the elastic bushing, and a clamping groove is provided in the middle of the thread petal.

[0009] In order to better implement the present invention, further, the ends of the first operating rod and the second operating rod are L-shaped structures respectively, and the inner walls on both sides of the ventilation groove are correspondingly provided with L-shaped grooves.

[0010] In order to better implement the utility model, further, the first operating rod and the second operating rod are respectively covered with anti-slip rubber sleeves.

[0011] In order to better implement the utility model, further, the outer side of the body is circumferentially provided with an external thread of M24 or M30 specification.

[0012] The beneficial effects of the utility model are as follows:

[0013] (1) During the use of the utility model, the main body can be provided with an M24 or M30 specification external thread, the L-shaped structure at the lower end of the operating mechanism is inserted into the L-shaped groove on the inner wall of the venting groove, and the main body is screwed into the protected deep hole thread by holding the non-slip rubber sleeve. That is, the deep hole thread area of ​​the combined parts and complex parts that do not require anodizing can be protected, which not only saves the production cost of the parts, but also improves the efficiency of on-site operations;

[0014] (2) The utility model can realize the protection of different-sized apertures by replacing the inner liner. When the inner liner is held and expanded, the elastic bushing elastically deforms so that the plurality of thread petals adapt to the threaded inner holes of corresponding sizes, and the sealing protection is realized by the sealing ring at the top of the inner liner, which has good practicality.

[0015] (3) The utility model uses a protective fixture to provide low-cost and high-efficiency protection for the threaded areas in the deep holes of parts that do not require anodizing. At the same time, the utility model eliminates the possibility of damage to the surface film layer caused by machining operations after the parts are oxidized, reduces the "air bag" phenomenon that exists in the anodizing process of deep-hole threaded parts, greatly improves on-site production efficiency, and saves production costs. Compared with the existing technology, the utility model has the advantages of convenient operation, strong versatility, high durability, low manufacturing cost, and precise and efficient protection, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A top view of a protective fixture for a deep hole thread structure used in anodizing treatment;

[0017] Figure 2 for Figure 1 Middle AA section view;

[0018] Figure 3 It is a structural diagram of the operating mechanism;

[0019] Figure 4 It is a schematic diagram of the connection structure between the first operating rod or the second operating rod and the anti-slip rubber sleeve;

[0020] Figure 5 This is a schematic diagram of the connection structure between the elastic bushing and the inner liner pipe in Example 2.

[0021] Among them: 1-main body, 2-external thread, 3-venting groove, 4-L-shaped groove, 5-operating mechanism, 6-spring, 7-anti-slip rubber sleeve, 8-elastic bushing, 9-inner lining tube, 10-threaded petal, 11-sealing ring. DETAILED DESCRIPTION

[0022] Embodiment 1:

[0023] A protective fixture for deep threaded holes in anodized processes, such as Figure 1-Figure 4As shown, it includes a body 1 of corresponding specifications and an operating mechanism 5, and the body 1 is installed at the deep hole thread of the part through the operating mechanism 5. The outer surface of the body 1 is provided with an external thread 2, and the inside of the body 1 is provided with a ventilation groove 3 with a square hole, and the ventilation groove 3 has the function of natural flow of solution or gas overflow at the deep hole. The operating mechanism 5 includes a first operating rod and a second operating rod, the top ends of the first operating rod and the second operating rod are hinged, and the upper parts of the first operating rod and the second operating rod are connected by a spring 6. The angle between the first operating rod and the second operating rod can be changed arbitrarily, which can meet the requirements of any specifications of the body 1. The first operating rod and the second operating rod are both metal rods, and the middle part of the metal rod is provided with an anti-slip rubber sleeve 7, and the lower end of the metal rod is an L-shaped structure. The inner wall of the ventilation groove 3 is correspondingly provided with an L-shaped groove 4, and the L-shaped groove 4 can be used for the operating mechanism 5 to install and remove the body 1. Specifically, the body 1 is made of polytetrafluoroethylene material with acid and alkali resistance, low friction coefficient and electrical insulation, and the first operating rod and the second operating rod are made of aluminum alloy.

[0024] During the use of the utility model, the body 1 may be provided with an external thread 2 of M24 or M30, the L-shaped structure at the lower end of the operating mechanism 5 is inserted into the L-shaped groove 4 on the inner wall of the vent groove 3, and the body 1 is screwed into the protected deep hole thread by holding the non-slip rubber sleeve 7. That is, the deep hole thread area of ​​the combined parts and complex parts that do not need anodizing can be protected, which not only saves the production cost of the parts, but also improves the efficiency of on-site operations.

[0025] Compared with the prior art, the utility model has the advantages of convenient operation, strong versatility, high durability, low manufacturing cost, precise and efficient protection. There will be no secondary machining and grinding or "air bag" phenomenon, which will cause a large number of parts to be repaired, reworked or even scrapped, which not only greatly saves production costs, but also reduces the labor intensity of operators, and has good practicality.

[0026] Embodiment 2:

[0027] A protective fixture for deep threaded holes in anodized processes, such as Figure 5As shown, it includes a body 1 and an operating mechanism 5. The body 1 includes an elastic bushing 8, an inner liner 9 and a plurality of threaded petals 10. The elastic bushing 8 is provided with a plurality of threaded petals 10 along the circumference, and the outer sides of the plurality of threaded petals 10 are provided with external threads 2; the inner liner 9 is sleeved and installed in the elastic bushing 8, and the top of the inner liner 9 extends out of the elastic bushing 8 and is provided with a sealing ring 11, and the middle of the inner liner 9 is provided with a ventilation groove 3. Specifically, one end of the first operating rod and the second operating rod are hinged, and a spring 6 is provided between the first operating rod and the second operating rod; the free ends of the first operating rod and the second operating rod extend into the ventilation groove 3 and fit and engage with the inner wall of the ventilation groove 3; the body 1 is made of polytetrafluoroethylene material, and the first operating rod and the second operating rod are respectively made of aluminum alloy.

[0028] Preferably, the ends of the first operating rod and the second operating rod are L-shaped structures, and the inner walls on both sides of the ventilation groove 3 are respectively provided with L-shaped grooves 4. Furthermore, the first operating rod and the second operating rod are respectively covered with anti-slip rubber sleeves 7.

[0029] The utility model can realize the protection of different sizes of apertures by replacing the inner liner tube 9. Under the holding and expansion of the inner liner tube 9, the elastic bushing 8 elastically deforms so that the plurality of thread petals 10 adapt to the threaded inner hole of the corresponding size, and the sealing protection is realized by the sealing ring 11 at the top of the inner liner tube 9. During the use of the utility model, the L-shaped structure at the lower end of the operating mechanism 5 is inserted into the L-shaped groove 4 on the inner wall of the ventilation groove 3, and the main body 1 is screwed into the protected deep hole thread by holding the non-slip rubber sleeve 7. That is, the deep hole thread area of ​​the combined parts and complex parts that do not need anodizing can be protected, which not only saves the production cost of the parts, but also improves the efficiency of on-site operations, and has good practicality.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A protective fixture for deep threaded holes used in anodizing treatment, characterized in that: The invention comprises a body (1) and an operating mechanism (5), wherein a ventilation groove (3) is arranged in the middle of the body (1) for allowing a solution to flow naturally or gas to overflow from a deep hole, and an external thread (2) is arranged on the outer side of the body (1) along the circumferential direction; the operating mechanism (5) comprises a first operating rod and a second operating rod, one end of the first operating rod and the second operating rod are hinged, and a spring (6) is arranged between the first operating rod and the second operating rod; the free ends of the first operating rod and the second operating rod extend into the ventilation groove (3) and are engaged with the inner wall of the ventilation groove (3); the body (1) is made of polytetrafluoroethylene material, and the first operating rod and the second operating rod are respectively made of aluminum alloy.

2. A protective fixture for deep threaded holes used in anodizing treatment according to claim 1, characterized in that: The body (1) comprises an elastic bushing (8), an inner liner tube (9) and a plurality of threaded petals (10); the elastic bushing (8) is provided with a plurality of threaded petals (10) along the circumference thereof, and the outer sides of the plurality of threaded petals (10) are provided with external threads (2); the inner liner tube (9) is sleeved and installed in the elastic bushing (8), and the top of the inner liner tube (9) extends out of the elastic bushing (8) and is provided with a sealing ring (11); and a ventilation groove (3) is provided in the middle of the inner liner tube (9).

3. A protective fixture for deep threaded holes used in anodizing treatment according to claim 2, characterized in that: A plurality of thread petals (10) are clamped on the circumferential side of the elastic bushing (8), and a clamping groove is provided in the middle of the thread petal (10).

4. A protective fixture for deep threaded holes used in anodizing treatment according to any one of claims 1 to 3, characterized in that: The ends of the first operating rod and the second operating rod are respectively L-shaped structures, and the inner walls on both sides of the ventilation groove (3) are respectively provided with L-shaped grooves (4).

5. A protective fixture for deep threaded holes used in anodizing treatment according to claim 4, characterized in that: The first operating rod and the second operating rod are respectively provided with an anti-slip rubber sleeve (7).

6. The protective fixture for deep threaded holes used in anodizing treatment according to claim 1, characterized in that: The outer side of the body (1) is provided with an external thread (2) of M24 or M30 specification along the circumferential direction.

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