Micro-arc oxidation tool for deep and narrow special-shaped groove
The design of conductive sheets and conductive distribution tubes solves the problems of long treatment time and poor consistency in micro-arc oxidation of deep and narrow special-shaped grooves, achieves more uniform protective layer formation and longer service life, and improves micro-arc oxidation efficiency and energy utilization efficiency.
Patent Information
- Application Number
- CN202423044180.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-10
AI Technical Summary
The existing technology has the problems of long processing time and poor product consistency when processing deep and narrow special-shaped grooves, resulting in uneven hardness of the protective layer and affecting the service life of the workpiece.
Conductive sheets are used to connect multiple pole ears, and conductive distribution tubes and conductive distribution plates are connected below to ensure the uniformity of the spacing between cathodes and anodes. Conductive distribution tubes and conductive distribution plates are used to provide cathodes to each chamber of the deep and narrow special-shaped slots to form a more uniform protective layer.
The efficiency of micro-arc oxidation treatment is improved, the treatment time is shortened, the energy consumption is reduced, the hardness of the protective layer is made more uniform, and the service life of the workpiece is extended.
Smart Images
Figure CN223481307U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of micro-arc oxidation technology, specifically relating to a deep and narrow irregular groove micro-arc oxidation tooling. Background Technology
[0002] Micro-arc oxidation (PEO), also known as electrolytic plasma oxidation (EPO) or micro-arc oxidation (MAO), is an electrochemical surface treatment process used to create oxide coatings on metal surfaces. Similar to anodizing, but employing a higher potential, it generates a discharge, and the resulting plasma alters the structure of the oxide layer. This process can be used to form predominantly crystalline oxide coatings tens or hundreds of micrometers thick on metals such as aluminum, magnesium, and titanium. Because it can exhibit high hardness and a continuous barrier, it can form a protective layer that provides resistance to wear, corrosion, heat, and electrical insulation.
[0003] Currently, the micro-arc oxidation process is mainly based on the structure of the electrolytic cell. The workpiece to be processed is placed in the electrolytic cell and electrically connected to an external power source for micro-arc oxidation, which can basically meet most micro-arc oxidation operations.
[0004] However, for workpieces that are deep and have complex internal structures (such as...), Figure 1 The deep and narrow irregular-shaped tank shown includes a tank body 01, which has a first chamber 011, a second chamber 012, a third chamber 013, and a fourth chamber 014. The third chamber 013 and the fourth chamber 014 are arranged side by side. The second chamber 012 is located between the first chamber 011 and the side by side third chamber 013 and fourth chamber 014. The size and depth of the second chamber 012 are smaller than those of the first chamber 011. The third chamber 013 and the fourth chamber 014 have the same depth and are both greater than the depth of the first chamber. A U-shaped frame 0131 is also provided in the third chamber 013. When using a traditional electrolytic cell structure for micro-arc oxidation treatment, the following problems exist: due to the relatively complex structure of the tank body, the electric field strength between the cathode and the anode are different. Although a relatively uniform protective layer can be formed in the tank body by increasing the micro-arc oxidation treatment time. However, on the one hand, the increased micro-arc oxidation time leads to higher energy consumption; on the other hand, the hardness of the protective layer varies considerably in different areas, resulting in poor consistency of the protective layer and affecting the subsequent service life of the workpiece. That is, areas with lower protective layer hardness are more prone to wear and damage, leading to a shorter service life of the entire workpiece. Utility Model Content
[0005] This invention addresses the problems of long processing time and poor product consistency in micro-arc oxidation of deep and narrow irregular grooves by providing a micro-arc oxidation fixture for deep and narrow irregular grooves. This fixture ensures a more uniform electric field intensity across all areas of the groove, resulting in a more uniform protective layer. This improves the consistency of the hardness of the protective layer across different areas, thereby extending the service life of the deep and narrow irregular groove product. Furthermore, compared to existing methods, this invention reduces the time required for micro-arc oxidation, increases efficiency, and lowers energy consumption.
[0006] To solve the technical problem, the technical solution adopted by this utility model is as follows:
[0007] A micro-arc oxidation fixture for deep and narrow irregular grooves is characterized by comprising a conductive sheet, on which multiple tabs are connected in parallel, and on which a terminal for interconnection with the cathode of a power source is connected. A conductive distribution cylinder and / or a conductive distribution plate are connected below the tabs. The conductive distribution cylinder is such that the distance from each outer wall of the conductive distribution cylinder to the inner wall of the corresponding cavity in the deep and narrow irregular groove is the same. The conductive distribution plate is such that the distance from the outer wall of the conductive distribution plate to the inner wall of the corresponding cavity in the deep and narrow irregular groove is the same.
[0008] In some embodiments, the transverse cross-sectional shape of the conductive distribution cylinder is generally the same as the transverse cross-sectional shape of the corresponding chamber on the deep and narrow irregular groove.
[0009] In some embodiments, an insulating plate is arranged on the outer wall and / or bottom of the conductive distribution cylinder and the conductive distribution plate.
[0010] In some embodiments, the conductive distribution cylinder is further provided with a plurality of air holes, and an air nozzle is connected to the upper end of the conductive distribution cylinder, the air nozzle being connected to an external air source through a pipe.
[0011] In some embodiments, the conductive sheet is further provided with a cover plate made of insulating material, the cover plate having a plurality of connecting support ears for connecting with the groove body of a deep and narrow irregular groove, and the cover plate having an insertion hole for the electrode ear to pass through.
[0012] In some embodiments, the conductive distribution cylinder includes a first conductive distribution cylinder corresponding to the first chamber of the deep and narrow irregular groove, a second conductive distribution cylinder corresponding to the second chamber of the deep and narrow irregular groove, and a third conductive distribution cylinder corresponding to the U-shaped groove in the third chamber of the deep and narrow irregular groove. The third chamber of the deep and narrow irregular groove is further provided with a second conductive distribution plate connected to the third conductive distribution cylinder, and the fourth chamber of the deep and narrow irregular groove is provided with a first conductive distribution plate.
[0013] In some embodiments, the cover plate has through holes corresponding to the chambers of the deep and narrow irregular groove. The through holes include a first through hole corresponding to the first chamber of the deep and narrow irregular groove, a second through hole corresponding to the second chamber of the deep and narrow irregular groove, and a third through hole corresponding to the third and fourth chambers of the deep and narrow irregular groove.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] This invention utilizes conductive sheets to connect electrode tabs, with a conductive distribution cylinder and / or conductive distribution plate connected below the electrode tabs. The conductive distribution cylinder and conductive distribution plate provide cathodes (negative electrodes) to each chamber in the deep and narrow irregular groove. Since the anode (positive electrode) is directly connected to the deep and narrow irregular groove in the micro-arc oxidation process (i.e., the workpiece to be micro-arc oxidized is directly electrically connected to the anode), the spacing between the cathode and anode can be made as uniform as possible, thereby improving the uniformity of micro-arc oxidation in each chamber of the deep and narrow irregular groove. This results in a more uniform texture and surface hardness of the protective layer formed by micro-arc oxidation, and improves the service life of the deep and narrow irregular groove (i.e., the workpiece) after micro-arc oxidation.
[0016] This invention utilizes a conductive distribution cylinder and a conductive distribution plate to ensure that the distance between the cathode and anode in each chamber of the deep and narrow irregular groove is as uniform as possible. This results in a consistent micro-arc oxidation reaction time across all regions of the groove, leading to a roughly uniform formation time for each region. Compared to existing micro-arc oxidation processes that extend the oxidation time, this invention rapidly and uniformly forms a protective layer across all areas of the workpiece, thereby shortening the oxidation time, increasing efficiency, and reducing energy consumption. Attached Figure Description
[0017] Figure 1 This is a top view structural schematic diagram of an embodiment of the deep and narrow irregular groove of this utility model;
[0018] Figure 2 This is a schematic diagram of the structure of an embodiment of the deep and narrow irregular groove micro-arc oxidation tooling of this utility model;
[0019] Figure 3 This is a schematic diagram of another embodiment of the deep and narrow irregular groove micro-arc oxidation tooling of the present invention. An insulating plate and an insulating pad are arranged in the schematic diagram.
[0020] Figure 4 This is a structural schematic diagram of an embodiment of the cover plate of this utility model;
[0021] Figure 5 This is a schematic diagram of the connection structure between the conductive sheet of this utility model and the first conductive distribution cylinder, the second conductive distribution cylinder, and the third conductive distribution cylinder;
[0022] Figure 6 This is a schematic diagram showing the connection between the third conductive distribution cylinder and the second conductive distribution plate of this utility model;
[0023] Figure 7 This is a schematic diagram of the connection structure between the conductive sheet of this utility model and the first conductive distribution cylinder, the second conductive distribution cylinder, and the third conductive distribution cylinder; in this schematic diagram, a first insulating plate is arranged on the first conductive distribution cylinder, an insulating pad is arranged on the second conductive distribution cylinder, and a second insulating plate and a third insulating plate are arranged on the third conductive distribution cylinder.
[0024] The diagram is labeled as follows: 01, groove body; 011, first chamber; 012, second chamber; 013, third chamber; 0131, U-shaped groove; 014, fourth chamber; 1, conductive sheet; 2, first electrode ear; 3, second electrode ear; 31, connecting piece; 4, third electrode ear; 5, terminal block; 6, first conductive distribution cylinder; 7, second conductive distribution cylinder; 71, vent hole; 72, air nozzle; 8, first conductive distribution plate; 9, third conductive distribution cylinder; 10, second conductive distribution plate; 11, first insulating plate; 12, second insulating plate; 13, third insulating plate; 14, fourth insulating plate; 15, cover plate; 151, first through hole; 152, second through hole; 153, third through hole; 154, insertion hole; 155, connecting support ear. Detailed Implementation
[0025] The present invention will be further described below with reference to the embodiments. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative effort are all within the protection scope of the present invention.
[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" 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 direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0027] Referring to the accompanying drawings, the micro-arc oxidation fixture for deep and narrow irregular grooves of this utility model includes a conductive sheet 1, with multiple tabs 2 connected in parallel on the conductive sheet 1. A terminal 5 for interconnecting with the cathode of a power source is connected to the conductive sheet 1. A conductive distribution cylinder and / or a conductive distribution plate are connected below the tabs 2. The conductive distribution cylinder is configured such that the distance from each outer wall of the conductive distribution cylinder to the inner wall of the corresponding cavity on the deep and narrow irregular groove is the same. The conductive distribution plate is configured such that the distance from the outer wall of the conductive distribution plate to the inner wall of the corresponding cavity on the deep and narrow irregular groove is the same. This invention utilizes a conductive sheet 1 connected to an electrode tab 2, with a conductive distribution cylinder and / or conductive distribution plate connected below the electrode tab 2. The conductive distribution cylinder and conductive distribution plate provide cathodes (negative electrodes) to each chamber in the deep and narrow irregular groove. Since the anode (positive electrode) is directly connected to the deep and narrow irregular groove in the micro-arc oxidation process (i.e., the workpiece to be micro-arc oxidized is directly electrically connected to the anode), the spacing between the cathode and the anode can be made as uniform as possible, thereby improving the uniformity of micro-arc oxidation in each chamber of the deep and narrow irregular groove. This results in a more uniform texture and surface hardness of the protective layer formed by micro-arc oxidation, thus increasing the service life of the deep and narrow irregular groove (i.e., the workpiece) after micro-arc oxidation.
[0028] This invention utilizes a conductive distribution cylinder and a conductive distribution plate to ensure that the distance between the cathode and anode in each chamber of the deep and narrow irregular groove is as uniform as possible. This results in a consistent micro-arc oxidation reaction time across all areas of the groove, leading to a roughly uniform formation time for each region. Compared to existing micro-arc oxidation processes that extend the oxidation time, this invention rapidly and uniformly forms a protective layer across all areas of the workpiece, thereby shortening the oxidation time and improving the efficiency of the micro-arc oxidation process.
[0029] In summary, this invention enables a more uniform electric field intensity in various regions within a deep and narrow irregular groove, thereby forming a more uniform protective layer on the groove and improving the consistency of the hardness of the protective layer formed in each region, thus extending the service life of the deep and narrow irregular groove product. Furthermore, compared to existing processing methods, this invention has the advantages of shorter micro-arc oxidation time, improved micro-arc oxidation efficiency, and reduced energy consumption.
[0030] In practice, due to the varying structural types of deep and narrow irregular grooves, and the extremely complex internal structures of some chambers (e.g., with numerous protrusions or grooves), it is impossible to perfectly match the external shape of the conductive distribution cylinder and conductive distribution plate to the chamber structure during actual manufacturing. Therefore, the distances from the outer arms of the guide distribution cylinder and conductive distribution plate to the inner wall of the corresponding deep and narrow irregular groove are made as similar as possible.
[0031] In actual manufacturing, if the number of workpieces (deep and narrow irregular grooves) to be micro-arc oxidation is large, and the company has good manufacturing technology, then the cross-sectional shape of the conductive distribution cylinder and conductive distribution plate can be made to match the cross-sectional shape of the corresponding cavity in the deep and narrow irregular groove. However, if the number of workpieces to be micro-arc oxidation is small, then the cost of manufacturing conductive distribution cylinders and conductive distribution plates with the same cross-sectional shape as the cavity is higher, rendering them impractical. Therefore, when manufacturing conductive distribution cylinders and conductive distribution plates, companies can produce them according to actual conditions, ensuring economic benefits while striving to make the cross-sectional shape of the conductive distribution cylinder and conductive distribution plate as similar as possible to the cross-sectional shape of the cavity, and also ensuring that the distance between the outer wall of the conductive distribution cylinder and conductive distribution plate and the inner wall of the corresponding cavity (i.e., the cavity in the deep and narrow irregular groove) is the same as much as possible.
[0032] In some embodiments, the transverse cross-sectional shape of the conductive distribution cylinder is generally the same as the transverse cross-sectional shape of the corresponding chamber on the deep and narrow irregular groove.
[0033] In some embodiments, insulating plates are arranged on the outer walls and / or bottom of the conductive distribution cylinder and the conductive distribution plate. In practical use, the insulating plates not only prevent short circuits caused by direct contact between the conductive distribution cylinder and the conductive distribution plate and the deep, narrow irregular groove (i.e., the workpiece), but also allow for adjustments to the distance between the conductive distribution cylinder and the conductive distribution plate and the inner wall of the workpiece (deep, narrow irregular groove) using insulating plates of different thicknesses. This ensures that the distance between the outer wall of the conductive distribution cylinder and the outer wall of the conductive distribution plate and the inner walls of the corresponding chambers in the deep, narrow irregular groove is as equal as possible.
[0034] In the specific implementation process, a first insulating plate 11 is arranged on both sides of the first conductive distribution cylinder, a second insulating plate 12 is arranged below the second conductive distribution cylinder 7, a third insulating plate 13 is arranged on the outside of the first conductive distribution plate 8, and a third insulating plate is arranged between the first conductive distribution plate 8 and the third conductive cylinder 9. An insulating plate is also arranged on the side of the second conductive distribution plate 10 away from the first conductive plate 8.
[0035] It should be noted that the inner walls of each chamber in the deep and narrow irregular groove described in this utility model include side walls and a bottom wall. This means that the depths of the conductive distribution cylinder and the conductive distribution plate should also be adapted to the depths of each chamber. For example, if the distance A between the outer wall of the conductive distribution cylinder and the inner wall of the chamber is the same as the distance A between the bottom of the conductive distribution cylinder and the bottom wall of the chamber. In other words, the outer walls of the conductive distribution cylinder and the conductive distribution plate correspond to the inner walls of the chambers, and the bottoms of the conductive distribution cylinder and the conductive distribution plate correspond to the inner bottom of the chambers.
[0036] In some embodiments, the conductive distribution cylinder is further provided with a plurality of air holes 7, and the upper end of the conductive distribution cylinder is connected to an air nozzle 72, which is connected to an external air source through a pipe. By providing air holes on the conductive distribution cylinder and connecting it to an external air source through the air nozzle, the micro-arc oxidation electrolyte added by the supplied air source can be agitated. Especially for conductive distribution cylinders with relatively small dimensions, since the corresponding deep and narrow irregular grooves contain less micro-arc oxidation electrolyte, the gas ejected from the air holes can agitate the micro-arc oxidation electrolyte, thereby improving the micro-arc oxidation treatment effect of the smaller chambers. For example, the two second chambers 012 of the deep and narrow irregular groove are relatively small in size. Therefore, a plurality of air holes 7 are provided on the periphery of the second conductive distribution cylinder 7 corresponding to the second chambers, and the upper end of the second conductive distribution cylinder 7 is also connected to an air nozzle 72, which is connected to an external air source through a pipe.
[0037] In some embodiments, the conductive sheet 1 is further provided with a cover plate 15 made of insulating material. The cover plate 15 has multiple connecting support ears 155 formed on it. These connecting support ears 155 are used to connect with the groove body 01 of the deep and narrow irregular groove. The cover plate 15 has insertion holes 152 for the electrode ears 2 to pass through. The number of through holes corresponds to the number of electrode ears, allowing the electrode ears to pass through the insertion holes. The cover plate primarily serves as insulation and protection, and also connects to the conductive distribution cylinder and conductive distribution plate, reinforcing them.
[0038] In some embodiments, the conductive distribution cylinder includes a first conductive distribution cylinder 6 corresponding to the first chamber 011 of the deep and narrow irregular groove, a second conductive distribution cylinder 7 corresponding to the second chamber 012 of the deep and narrow irregular groove, and a third conductive distribution cylinder 9 corresponding to the U-shaped groove 0131 in the third chamber 013 of the deep and narrow irregular groove. A second conductive distribution plate 10 connected to the third conductive distribution cylinder 9 is also provided in the third chamber 013 of the deep and narrow irregular groove, and a first conductive distribution plate 8 is provided in the fourth chamber 014 of the deep and narrow irregular groove.
[0039] In specific implementation, the structures of the conductive distribution cylinder and the conductive distribution plate can be selectively set according to the width of the cavity of the deep and narrow irregular groove. For example, when the width of the cavity is relatively wide, a conductive distribution cylinder can be used; when the width of the cavity is relatively narrow, a conductive distribution plate can be used. Therefore, those skilled in the art can selectively arrange the conductive distribution cylinder or the conductive distribution plate according to the specific structure of the deep and narrow irregular groove. For example, the width of the fourth cavity 014 of the groove body 01 of the deep and narrow irregular groove is relatively small, so the first conductive distribution plate is arranged in the fourth cavity 014. Since the third cavity 013 has a U-shaped groove 0131 and the remaining area has a relatively long length, the third conductive distribution cylinder 9 and the second conductive distribution plate 10 are arranged in the third cavity 013. The combined effect of the third conductive distribution cylinder and the second conductive distribution plate is used to maximize the uniformity of the micro-arc oxidation treatment on each surface in the third cavity 013.
[0040] In some embodiments, the cover plate 15 has through holes corresponding to the chambers of the deep and narrow irregular groove. The through holes include a first through hole 151 corresponding to the first chamber 011 of the deep and narrow irregular groove, a second through hole 152 corresponding to the second chamber 012 of the deep and narrow irregular groove, and a third through hole 153 corresponding to the third chamber 013 and the fourth chamber 014 of the deep and narrow irregular groove. The through holes facilitate observation of the micro-arc oxidation process.
Claims
1. A deep and narrow irregular groove micro-arc oxidation tooling, characterized in that, The device includes a conductive sheet (1) with multiple tabs (2) connected in parallel on it. A terminal (5) for interconnecting with the cathode of a power source is connected to the conductive sheet (1). A conductive distribution cylinder and / or a conductive distribution plate are connected below the tabs (2). The conductive distribution cylinder is such that the distance from each outer wall of the conductive distribution cylinder to the inner wall of the corresponding cavity on the deep and narrow groove is the same. The conductive distribution plate is such that the distance from the outer wall of the conductive distribution plate to the inner wall of the corresponding cavity on the deep and narrow groove is the same.
2. The deep and narrow irregular groove micro-arc oxidation tooling according to claim 1, characterized in that, The transverse cross-sectional shape of the conductive distribution cylinder is generally the same as the transverse cross-sectional shape of the corresponding chamber on the deep and narrow irregular groove.
3. The deep and narrow irregular groove micro-arc oxidation tooling according to claim 1, characterized in that, Insulating plates are arranged on the outer walls and / or bottom of the conductive distribution cylinder and conductive distribution plate.
4. The deep and narrow irregular groove micro-arc oxidation tooling according to any one of claims 1-3, characterized in that, The conductive distribution cylinder is also provided with several air holes (71), and the upper end of the conductive distribution cylinder is connected to an air nozzle (72), which is connected to an external air source through a pipe.
5. The deep and narrow irregular groove micro-arc oxidation tooling according to claim 4, characterized in that, The conductive sheet (1) is also equipped with a cover plate (15) made of insulating material. Multiple connecting support ears (155) are formed on the cover plate (15). The connecting support ears (155) are used to connect with the groove body (01) of the deep and narrow irregular groove. An insertion hole (154) for the electrode ear (2) to pass through is provided on the cover plate (15).
6. The deep and narrow irregular groove micro-arc oxidation tooling according to claim 5, characterized in that, The conductive distribution cylinder includes a first conductive distribution cylinder (6) corresponding to the first chamber (011) of the deep and narrow irregular groove, a second conductive distribution cylinder (7) corresponding to the second chamber (012) of the deep and narrow irregular groove, and a third conductive distribution cylinder (9) corresponding to the U-shaped groove (0131) in the third chamber (013) of the deep and narrow irregular groove. A second conductive distribution plate (10) connected to the third conductive distribution cylinder (9) is also provided in the third chamber (013) of the deep and narrow irregular groove. A first conductive distribution plate (8) is provided in the fourth chamber (014) of the deep and narrow irregular groove.
7. The deep and narrow irregular groove micro-arc oxidation tooling according to claim 6, characterized in that, The cover plate (15) has through holes corresponding to the chambers of the deep and narrow groove. The through holes include a first through hole (151) corresponding to the first chamber (011) of the deep and narrow groove, a second through hole (152) corresponding to the second chamber (012) of the deep and narrow groove, and a third through hole (153) corresponding to the third chamber (013) and the fourth chamber (014) of the deep and narrow groove.