Hard anodic oxidation device

Abstract

The utility model provides a hard anodizing device, which is used for carrying out hard anodizing on aluminum parts and comprises a main rod, a plurality of cushion block groups and a plurality of conductive shafts, the main rod is provided with a hanging end, the hanging end is provided with a bent hook and used for being connected with an oxidation tank for hard anodic oxidation in a hanging mode, and a plurality of first mounting holes are formed in the main rod at equal intervals; the cushion block sets are fixedly connected with the main rod corresponding to the first mounting holes, first threaded through holes are formed in the cushion block sets, the first threaded through holes and the first mounting holes are coaxial, and an included angle is formed between the axes of the first threaded through holes and the first mounting holes; each conductive shaft is provided with a mounting end and an assembling end, the mounting ends are in threaded connection with the cushion block set through the first threaded through holes, the conductive shafts are arranged in a left-right staggered mode in the length direction of the main rod, and the assembling ends are located below the mounting ends in an inclined mode and are in threaded connection with the aluminum part.

Description

Technical Field

[0001] The utility model relates to the technical field of anodizing, and specifically, relates to a hard anodizing device. Background Art

[0002] Hard anodizing of aluminum and aluminum alloy parts typically utilizes fixtures made of aluminum or aluminum alloy. These fixtures utilize elastic hooks to clamp a specific area of ​​the part, relying on contact pressure to ensure good conductivity during the oxidation process. However, these traditional fixtures often leave noticeable marks on the part surface, affecting the uniformity and appearance of the oxide film. Furthermore, due to electrochemical reactions during the oxidation process, the clamped area of ​​the part may not be in full contact with the bath solution, resulting in incomplete oxide film formation.

[0003] Therefore, there is an urgent need to develop a hard anodizing device that can ensure that the oxide film on the surface of aluminum parts has uniformity, integrity, thickness and hardness that meet the process requirements. Utility Model Content

[0004] The utility model provides a hard anodizing device, which at least solves the problems of the existing hard anodizing device that the oxide film layer is prone to leave hanger marks and the oxide film is incomplete.

[0005] To achieve the above-mentioned purpose, the present invention provides a hard anodizing device for hard anodizing aluminum parts, comprising:

[0006] A main rod having a hanging end, wherein the hanging end has a bent hook for hanging with an oxidation tank for hard anodizing, and a plurality of first mounting holes are formed on the main rod at equal intervals;

[0007] A plurality of pad groups are fixedly connected to the main rod corresponding to the plurality of first mounting holes, and a first threaded through hole is formed on the pad group. The first threaded through hole is coaxial with the first mounting hole, and the axes of the two form an angle;

[0008] Multiple conductive shafts, each conductive shaft has a mounting end and an assembly end, the mounting end is screwed to the pad group through the first threaded through hole, and the multiple conductive shafts are staggered left and right along the length direction of the main rod, the assembly ends are all located obliquely below the mounting end, and the assembly ends are screwed to the aluminum parts.

[0009] Furthermore, the pad group includes two wedge-shaped pads, each of which is provided with a second mounting hole, the bottom surfaces of the two wedge-shaped pads are tightly attached to the main rod and the two wedge-shaped pads are rotationally symmetrical relative to the axis of the main rod, the two second mounting holes of the two wedge-shaped pads are connected to form a first threaded through hole, and the wedge-shaped pads adjacent to each other along the length direction of the main rod are mirror-symmetrically arranged.

[0010] Furthermore, it also includes:

[0011] A plurality of nuts are provided, and the conductive shaft is fixedly connected to the spacer block assembly through the nuts.

[0012] Furthermore, the main rod and the plurality of pad blocks are all made of aluminum alloy.

[0013] Furthermore, the multiple conductive shafts and the multiple nuts are all made of titanium alloy.

[0014] Furthermore, the plurality of pad block groups are fixed to the main rod by welding.

[0015] Furthermore, the aluminum parts are all provided with wire screw holes, and are threadedly connected to the conductive shaft through the wire screw holes.

[0016] Furthermore, the main rod is a titanium alloy plate.

[0017] Furthermore, the bent hook is integrated with the main rod.

[0018] Furthermore, the bending hook and the main rod are formed by bending a titanium alloy plate in one piece.

[0019] Compared with the prior art, the advantages and positive effects of the present invention are:

[0020] This utility model provides a hard anodizing device that, through the provision of wedge-shaped spacers and the staggered arrangement of conductive shafts, reduces the contact pressure between the clamping area and the aluminum part, thereby effectively avoiding the formation of hanger marks and bubbles. Furthermore, the conductive shafts are screwed to the wire threaded holes of the aluminum part itself, further avoiding tooling marks and resolving the problem of insufficient contact between the clamping area and the bath liquid. This ensures the uniformity and integrity of the oxide film, while also facilitating the loading and unloading of aluminum parts and improving work efficiency.

[0021] The main rod of the hard anodizing device of the utility model is made of aluminum alloy, which can ensure sufficiently large current input and good conductive performance; the threaded conductive shaft and nut in contact with the parts are made of titanium alloy, avoiding the need to remove the film when used again, and there is no material loss during film removal, which effectively shortens the production cycle and extends the service life of the oxidation tooling.

[0022] The utility model can simultaneously mount a plurality of aluminum parts on the hard anodizing device to simultaneously perform hard anodizing, thereby improving batch production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the traditional oxidation tooling structure and parts assembly;

[0024] Figure 2This is a schematic structural diagram of the hard anodizing device of the utility model;

[0025] Figure 3 A schematic diagram of assembling aluminum parts for the hard anodizing device of the present invention;

[0026] Figure 4 This is a cross-sectional view of the structure of the hard anodizing device of the present utility model;

[0027] Figure 5 This is a schematic diagram of the main rod structure of the utility model;

[0028] Figure 6 This is a cross-sectional view of the assembly structure of the main rod and the cushion block of the utility model;

[0029] Figure 7 This is a schematic diagram of the wedge-shaped pad structure of the utility model.

[0030] In the above picture:

[0031] 1. Main rod; 11. Bend hook; 12. First mounting hole; 2. Wedge-shaped spacer; 22. First threaded through hole; 23. Second mounting hole; 3. Conductive shaft; 31. Mounting end; 32. Assembly end; 4. Nut; 5. Aluminum parts. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "liquid level", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0035] Figure 1 This is a schematic diagram of the traditional oxidation tooling structure and parts assembly, such as Figure 1 As shown, the traditional oxidation hanger structure utilizes the elasticity of the tooling hook to clamp a certain part of the part, relying on its contact pressure to ensure good electrical conductivity during the oxidation process. The clamping part of the part and the part undergo an electrochemical reaction because they cannot contact the bath liquid, thus easily forming a tooling hanger mark. In some embodiments, for the hard anodizing of aluminum parts with specific process requirements, a higher current density and longer oxidation time are required to ensure the thickness and hardness of the oxide film layer specified by the technical requirements. The oxidation tooling must have sufficient conductivity to ensure the normal oxidation process. To prevent the formation of a non-conductive oxide film due to loose contact of the tooling hook, which affects the continued formation of the oxide film layer, the tooling hook requires strong elasticity. As a result, the traditional oxidation tooling leaves a large hanger mark on the edge of the part. Due to the part design structure, bubble marks are also left on the inner surface of the part, that is, there is no oxide layer. In summary, the existing traditional oxidation tooling cannot meet production needs. In order to meet the technical requirements of the part while ensuring the appearance quality of the part's oxide film layer, the present invention provides a hard anodizing device.

[0036] The following combination Figure 2-Figure 7 The hard anodizing device of the utility model and the structure of each component are described in detail.

[0037] like Figure 2-Figure 7 As shown, the utility model provides a hard anodizing device for hard anodizing an aluminum part 5, comprising a main rod 1, a plurality of pad groups and a plurality of conductive shafts 3.

[0038] The main rod 1 has a hanging end with a bent hook 11 for hanging with an oxidation tank for hard anodizing. The main rod 1 is provided with a plurality of first mounting holes 12 at equal intervals.

[0039] The bent hook 11 on the main rod 1 provides a stable connection point, ensuring the stable hanging of the tooling in the oxidation tank and preventing processing errors caused by unstable hanging. The equally spaced first mounting holes 12 design makes the installation of the conductive shaft 3 and the pad group more convenient and quick, improves the installation efficiency and positioning accuracy of the tooling, and at the same time ensures that the conductive shaft 3 on the entire main rod 1 is evenly distributed, which helps to achieve uniform distribution of current during the oxidation process, thereby improving the uniformity of the oxide film.

[0040] A plurality of pad groups are fixedly connected to the main rod 1 corresponding to the plurality of first mounting holes 12. A first threaded through hole is provided on the pad group. The first threaded through hole is coaxial with the first mounting hole 12 and the axes thereof form an angle;

[0041] The design of the angle helps to optimize the current path between the conductive shaft 3 and the main rod 1, reduce the risk of current concentration and overheating, improve the safety and efficiency of the oxidation process, and enable the aluminum part 5 to be installed in the hard anodizing device without contact. At the same time, the pad group increases the contact area with the main rod 1, improves the stability and conductivity of the structure, and helps to make the oxide film layer more uniform.

[0042] Multiple conductive shafts 3, each having a mounting end 31 and an assembly end 32. The mounting end 31 is threadedly connected to the spacer assembly through the first threaded through-hole. The multiple conductive shafts 3 are staggered left and right along the length of the main rod 1. The assembly ends 32 are all located obliquely below the mounting end 31 and are threadedly connected to the aluminum part 5.

[0043] The mounting end 31 of each conductive shaft 3 is screwed to the pad assembly via a threaded through hole, ensuring a secure connection to the main rod 1 with excellent conductivity. The staggered arrangement of the conductive shafts 3 along the length of the main rod 1 provides greater flexibility and adaptability, allowing them to accommodate aluminum parts 5 of different shapes and sizes while ensuring that there is no interference between the aluminum parts 5. The staggered arrangement of the conductive shafts 3 and the design of the obliquely downward assembly end 32 reduce direct pressure on the surface of the part, thereby reducing the risk of contact marks on the surface of the part. The assembly end 32 of the conductive shaft 3 is screwed to the aluminum part 5, further avoiding tooling marks and solving the problem of the clamping part not being able to fully contact the tank liquid, ensuring the uniformity and integrity of the oxide film. This also facilitates the loading and unloading of the aluminum part 5 and improves work efficiency.

[0044] Multiple nuts 4, the conductive shaft 3 is fixedly connected to the spacer group through the nuts 4.

[0045] Preferably, if Figure 6-7As shown, the pad group includes two wedge-shaped pads 2, each wedge-shaped pad 2 is provided with a second mounting hole 23, the bottom surfaces of the two wedge-shaped pads 2 are both in close contact with the main rod 1 and the two wedge-shaped pads 2 are rotationally symmetrically arranged relative to the axis of the main rod 1, the two second mounting holes 23 of the two wedge-shaped pads 2 are connected to form a first threaded through hole, and the wedge-shaped pads 2 adjacent to each other along the length direction of the main rod 1 are mirror-symmetrically arranged.

[0046] Preferably, the main rod 1 and the plurality of pad blocks are all made of aluminum alloy.

[0047] Preferably, the multiple conductive shafts 3 and the multiple nuts 4 are all made of titanium alloy. Titanium alloy materials can be used without stripping after the parts are oxidized, avoiding the need for stripping when reused, effectively shortening the production cycle and extending the service life of the hard anodized tooling.

[0048] Preferably, the plurality of pad block groups are fixed to the main rod 1 by welding. The pad and the main rod 1 adopt a welded structure, which can ensure the strength and electrical conductivity of the tooling and reduce production costs.

[0049] Preferably, the aluminum parts 5 are each provided with a wire screw hole, through which the aluminum parts 5 are screwed to the conductive shaft 3 .

[0050] Preferably, the main rod 1 is a titanium alloy plate.

[0051] Preferably, the bending hook 11 and the main rod 1 are integrated.

[0052] Preferably, the bending hook 11 and the main rod 1 are formed by bending a titanium alloy plate in one piece. The one-piece bending hook 11 helps to evenly distribute stress and reduce the risk of breakage or deformation.

[0053] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A hard anodizing device for hard anodizing aluminum parts, characterized in that: include: A main rod having a hanging end, wherein the hanging end has a bent hook for hanging with an oxidation tank for hard anodizing, and a plurality of first mounting holes are formed on the main rod at equal intervals; A plurality of pad groups are fixedly connected to the main rod corresponding to the plurality of first mounting holes, and a first threaded through hole is formed on the pad group. The first threaded through hole is coaxial with the first mounting hole, and the axes of the two form an angle; Multiple conductive shafts, each conductive shaft has a mounting end and an assembly end, the mounting end is screwed to the pad group through the first threaded through hole, and the multiple conductive shafts are staggered left and right along the length direction of the main rod, the assembly ends are all located obliquely below the mounting end, and the assembly ends are screwed to the aluminum parts.

2. The hard anodizing device according to claim 1, characterized in that The pad group includes two wedge-shaped pads, each of which is provided with a second mounting hole. The bottom surfaces of the two wedge-shaped pads are tightly attached to the main rod and the two wedge-shaped pads are rotationally symmetrical relative to the axis of the main rod. The two second mounting holes of the two wedge-shaped pads are connected to form a first threaded through hole, and the wedge-shaped pads adjacent to each other along the length direction of the main rod are mirror-symmetrically arranged.

3. The hard anodizing device according to claim 1, characterized in that: Also includes: A plurality of nuts are provided, and the conductive shaft is fixedly connected to the spacer block assembly through the nuts.

4. The hard anodizing device according to claim 1, characterized in that: The main rod and the plurality of pad blocks are both made of aluminum alloy.

5. The hard anodizing device according to claim 2, characterized in that: The multiple conductive shafts and the multiple nuts are all made of titanium alloy.

6. The hard anodizing device according to claim 1, characterized in that The plurality of pad block groups are all fixed to the main rod by welding.

7. The hard anodizing device according to claim 1, characterized in that: The aluminum parts are all provided with wire screw sleeve holes, and are threadedly connected to the conductive shaft through the wire screw sleeve holes.

8. The hard anodizing device according to claim 1, characterized in that: The main rod is a titanium alloy plate.

9. The hard anodizing device according to claim 7, characterized in that: The bent hook is integrated with the main rod.

10. The hard anodizing device according to claim 7, characterized in that: The bending hook and the main rod are formed by bending a titanium alloy plate in one piece.

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