Special clamp for anodic oxidation of small aluminum alloy gasket and use method

Abstract

The invention provides a special clamp for anodic oxidation of a small aluminum alloy gasket and a using method. The clamp comprises a main rod 1, a locking bolt 3, a conductive chuck 4, a conical conductive unit 5, a mounting disc 6 and an argon arc welding seam 8, the small aluminum alloy gaskets 7 are tightly matched with the outer conical surfaces of the conical conductive units through inner holes of the small aluminum alloy gaskets 7, anodic oxidation treatment of the small aluminum alloy gaskets is achieved, corrosion resistance is guaranteed, and production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the field of surface treatment, and in particular relates to a special fixture for anodizing a small aluminum alloy gasket and a use method thereof. Background Art

[0002] The small aluminum alloy gaskets used for oxygen system installation are small in size and large in quantity, and the design requires that the surface treatment method be anodizing.

[0003] However, during anodizing, conventional clamping methods are used, and either the clamping electrical contact part is set on the plane of the gasket, but a large clamp mark will be left, affecting the appearance quality; or a V-shaped support is used to set the clamping contact point on the inner hole of the gasket, relying on the tension of the V-shaped support to achieve electrical contact with the inner hole of the gasket, but because the inner hole is too small, the wire diameter of the selected V-shaped support material is too fine, the rigidity is insufficient, and the clamping is not tight, resulting in poor conductivity and a large number of gaskets falling into the groove during the anodizing process, seriously affecting the quality of the anodized film and causing a large number of scrapped; if the surface treatment method is changed to chemical oxidation treatment, although no clamp mark will be produced, the corrosion resistance of the chemical oxidation film is poor, which will cause the product environmental test-salt spray test to fail and not be accepted by users. Summary of the invention

[0004] The invention provides a special clamp for anodizing of a small aluminum alloy gasket and a use method thereof, which can realize reliable and quick clamping of the small aluminum alloy gasket, thereby ensuring the appearance quality of the film layer and improving the production efficiency.

[0005] The present invention provides a special fixture for anodizing small aluminum alloy gaskets, comprising: a main rod 1, a locking bolt 3, a conductive chuck 4, a conical conductive unit 5, and a mounting plate 6;

[0006] A plurality of conical conductive units 5 are welded on the mounting plate 6, a main rod 1 is welded on the upper surface of the mounting plate 6, the top of the main rod 1 is bent downward to form a conductive clamp 4, the anode conductive rod 2 is clamped between the top of the main rod 1 and the conductive clamp 4, and is fixed by a locking bolt 3 that passes through the conductive clamp 4, the anode conductive rod 2 and the top of the main rod 1 in sequence;

[0007] The end of the tapered conductive unit 5 located below the mounting plate 6 is tapered;

[0008] The small aluminum alloy gasket 7 is inserted into the outer conical surface of the conical conductive unit 5 and fits tightly without falling off;

[0009] When the special fixture is subjected to anodizing treatment according to the process specification, the conical head of the conical conductive unit 5 is located below the mounting plate 6 .

[0010] Optionally, the main rod 1 and the conductive chuck 4 are conductive and are made of titanium alloy rods, and the load of the conductive cross section is 1.5A / mm2 .

[0011] Optionally, the locking bolt 3 is made of titanium alloy, has a specification greater than M8, and a length that exceeds the sum of the diameter of the anode conductive rod 2 and twice the thickness of the conductive clamp 4 by 10 mm.

[0012] Optionally, the minimum cone diameter of the conical conductive unit 5 is smaller than the inner hole diameter of the small aluminum alloy gasket 7 , and the middle diameter of the cone is larger than the inner hole diameter of the small aluminum alloy gasket 7 .

[0013] Optionally, the mounting plate 6 is made of a titanium alloy plate with a thickness of 4 to 6 mm.

[0014] Optionally, the mounting plate 6 and the conical conductive unit 5 are connected by argon arc welding.

[0015] Optionally, the argon arc weld 8 is single-sided welded, the weld penetrates the thickness of the mounting plate 6, the weld is polished smooth, and there is no gap at the welded part.

[0016] The present invention also provides a method for using the special fixture for anodizing small aluminum alloy gaskets as described in any one of the above items, comprising:

[0017] Insert the small aluminum alloy gasket 7 through the inner hole onto the outer conical surface of the conical conductive unit 5, and manually apply axial force to achieve a tight fit in the inner hole of the gasket;

[0018] Then place the conductive clamp 4 on the anode conductive bar 2, and then fasten the special clamp to the anode conductive bar 2 through the locking bolt 3;

[0019] Finally, anodizing treatment is carried out according to the process specifications.

[0020] The advantages of the present invention are as follows: the present invention provides a special fixture for anodizing small aluminum alloy gaskets and a method for using the same, utilizing a conical conductive unit to achieve a tight fit with the small aluminum alloy gasket, utilizing oxygen generated on the surface of the gasket during the anodizing process to generate an upward buoyancy force on the gasket so that the gasket and the conical conductive unit fit more tightly, thereby achieving clamping and tightening, good conductivity, and quick clamping, which not only ensures the appearance quality but also improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 A special fixture for anodizing small aluminum alloy gaskets;

[0023] Description of reference numerals:

[0024] Main rod 1, anode conductive rod 2, locking bolt 3, conductive chuck 4, conical conductive unit 5, mounting plate 6, small aluminum alloy gasket 7, argon arc welding seam 8. DETAILED DESCRIPTION

[0025] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with the embodiments. The following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the protection scope of the specific claims of the present invention.

[0026] The special fixture for anodizing small aluminum alloy gaskets provided by the present invention is explained below with reference to the accompanying drawings.

[0027] like Figure 1 As shown, the present invention provides a special fixture for anodizing small aluminum alloy gaskets, comprising: a main rod 1, a locking bolt 3, a conductive chuck 4, a conical conductive unit 5, and a mounting plate 6;

[0028] A plurality of conical conductive units 5 are welded on the mounting plate 6, a main rod 1 is welded on the upper surface of the mounting plate 6, the top of the main rod 1 is bent downward to form a conductive clamp 4, the anode conductive rod 2 is clamped between the top of the main rod 1 and the conductive clamp 4, and is fixed by a locking bolt 3 that passes through the conductive clamp 4, the anode conductive rod 2 and the top of the main rod 1 in sequence;

[0029] The end of the tapered conductive unit 5 located below the mounting plate 6 is tapered;

[0030] The small aluminum alloy gasket 7 is inserted into the outer conical surface of the conical conductive unit 5 and fits tightly without falling off;

[0031] When the special fixture is subjected to anodizing treatment according to the process specification, the conical head of the conical conductive unit 5 is located below the mounting plate 6 .

[0032] Optionally, the main rod 1 and the conductive chuck 4 are conductive and are made of titanium alloy rods, and the load of the conductive cross section is 1.5A / mm 2 .

[0033] Optionally, the locking bolt 3 is made of titanium alloy, has a specification greater than M8, and a length that exceeds the sum of the diameter of the anode conductive rod 2 and twice the thickness of the conductive clamp 4 by 10 mm.

[0034] Optionally, the minimum cone diameter of the conical conductive unit 5 is smaller than the inner hole diameter of the small aluminum alloy gasket 7 , and the middle diameter of the cone is larger than the inner hole diameter of the small aluminum alloy gasket 7 .

[0035] Optionally, the mounting plate 6 is made of a titanium alloy plate with a thickness of 4 to 6 mm.

[0036] Optionally, the mounting plate 6 and the conical conductive unit 5 are connected by argon arc welding.

[0037] Optionally, the argon arc weld 8 is single-sided welded, the weld penetrates the thickness of the mounting plate 6, the weld is polished smooth, and there is no gap at the welded part.

[0038] The present embodiment provides a special fixture for anodizing small aluminum alloy gaskets. The small aluminum alloy gasket 7 is inserted into the outer conical surface of the conical conductive unit 5 through the inner hole, and the axial force is manually applied to achieve a tight fit in the inner hole of the gasket. The conductive clamp 4 is then placed on the anode conductive bar 2, and the special fixture is then fastened to the anode conductive bar 2 by the locking bolt 3. Finally, the anodizing treatment is carried out according to the process specifications.

[0039] During the anodizing process, the gasket 7 acts as an anode. Oxygen is generated on the anode surface and escapes upward, exerting an upward buoyancy on the lower plane of the gasket 7. This causes the gasket 7 to tend to move upward along the conical surface of the conical conductive unit 5. The diameter of the conical surface gradually increases from the bottom to the top, which results in a tighter fit between the gasket 7 and the conical conductive unit 5. Therefore, the gasket 7 will not fall off during the anodizing process.

[0040] In summary, the special fixture for anodizing of the small aluminum alloy gasket can not only achieve firm and fast clamping, but also ensure that the gasket 7 will not fall off during the anodizing process.

[0041] The main rod 1 is made of titanium alloy rod, and the load of its current-carrying cross section is 1.5A / mm 2 The conductive chuck 4 is made of titanium alloy sheet, and the load of its energized cross-sectional area is 1.5A / mm 2 ; The locking bolt 3 is made of titanium alloy, the bolt specification should be greater than M8, and the length should exceed the sum of the diameter of the anode conductive rod 2 and the thickness of the conductive chuck 4 by 10mm; the minimum diameter of the cone of the conical conductive unit 5 should be smaller than the inner hole diameter of the small aluminum alloy gasket 7, and the diameter of the middle of the cone should be greater than the inner hole diameter of the gasket 7; the mounting plate 6 is made of titanium alloy plate with a thickness of 4 to 6mm; the mounting plate 6 and the conical conductive unit 5 are connected by argon arc welding;

[0042] The argon arc weld 8 is single-sided welding, but the thickness of the mounting plate 6 should be penetrated, the weld should be polished smooth, and there should be no gap in the welding position.

[0043] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A special fixture for anodizing small aluminum alloy gaskets, characterized in that: include: A main rod (1), a locking bolt (3), a conductive chuck (4), a conical conductive unit (5), and a mounting plate (6); A plurality of conical conductive units (5) are welded on the mounting plate (6), a main rod (1) is welded on the upper surface of the mounting plate (6), the top of the main rod (1) is bent downward to form a conductive clamp (4), the anode conductive rod (2) is clamped between the top of the main rod (1) and the conductive clamp (4), and is fixed by a locking bolt (3) that passes through the conductive clamp (4), the anode conductive rod (2) and the top of the main rod (1) in sequence; The end of the conical conductive unit (5) located below the mounting plate (6) is conical; The small aluminum alloy gasket (7) is inserted into the outer conical surface of the conical conductive unit (5) and is tightly fitted so as not to fall off; When the special fixture performs anodizing treatment according to the process specification, the conical head of the conical conductive unit (5) is located below the mounting plate (6).

2. The special fixture according to claim 1, characterized in that: The main rod (1) and the conductive chuck (4) are conductive and are made of titanium alloy rods. The load of the conductive cross section is 1.5A / mm. 2 .

3. The special fixture according to claim 1, characterized in that: The locking bolt (3) is made of titanium alloy, has a specification greater than M8, and has a length that exceeds the sum of the diameter of the anode conductive rod (2) and twice the thickness of the conductive clamp (4) by 10 mm.

4. The special fixture according to claim 1, characterized in that: The minimum cone diameter of the conical conductive unit (5) is smaller than the inner hole diameter of the small aluminum alloy gasket (7), and the middle diameter of the cone is larger than the inner hole diameter of the small aluminum alloy gasket (7).

5. The special fixture according to claim 1, characterized in that: The mounting plate (6) is made of a titanium alloy plate with a thickness of 4 to 6 mm.

6. The special fixture according to claim 1, characterized in that: The mounting plate (6) and the conical conductive unit (5) are connected by argon arc welding.

7. The special fixture according to claim 1, characterized in that: The argon arc welding seam (8) is single-sided welding, and penetrates the plate thickness of the mounting plate (6). The weld is polished smooth and there is no gap at the welding position.

8. A method for using a special fixture for anodizing small aluminum alloy gaskets as claimed in any one of claims 1 to 7, characterized in that: include: Inserting a small aluminum alloy gasket (7) through the inner hole onto the outer conical surface of the conical conductive unit (5), and manually applying an axial force to achieve a tight fit with the inner hole of the gasket; Then, the conductive clamp (4) is placed on the anode conductive rod (2), and then the special clamp is fastened and connected to the anode conductive rod (2) by means of a locking bolt (3); Finally, anodizing treatment is carried out according to the process specifications.

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