CN112095131A - Tool equipment and method for preparing closed cylindrical inner cavity ceramic layer - Google Patents

Tool equipment and method for preparing closed cylindrical inner cavity ceramic layer Download PDF

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Publication number
CN112095131A
CN112095131A CN202010856341.4A CN202010856341A CN112095131A CN 112095131 A CN112095131 A CN 112095131A CN 202010856341 A CN202010856341 A CN 202010856341A CN 112095131 A CN112095131 A CN 112095131A
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cathode
closing
ceramic layer
cylindrical workpiece
rod
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CN112095131B (en
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吴护林
李立
李忠盛
张昭林
杨九州
付扬帆
陈汉宾
陈海涛
丛大龙
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No 59 Research Institute of China Ordnance Industry
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No 59 Research Institute of China Ordnance Industry
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/005—Apparatus specially adapted for electrolytic conversion coating
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/026—Anodisation with spark discharge
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used

Abstract

The invention provides tooling equipment and a method for preparing a necking cylindrical inner cavity ceramic layer, wherein the tooling equipment consists of a cathode rod (1), a support rod (2), a cathode fixing plate (4), an anode power connection screw (5), a support plate (6), a conductive column (7) and a cathode power connection screw (8); wherein, through two spinal branch vaulting pole (2) fixed connection between backup pad (6) and cathode fixed plate (4), backup pad (6) upper surface, be located evenly to set up a plurality of and lead electrical pillar (7) in the region between two spinal branch vaulting poles (2), correspond on cathode fixed plate (4) to lead electrical pillar (7) and set up cathode bar (1). The invention realizes the weakening of the electric field on the outer wall of the closing-up cylindrical workpiece and the strengthening of the electric field on the inner wall of the closing-up cylindrical workpiece, and further forms the ceramic layer with thick inside and thin outside of the closing-up cylindrical workpiece, thereby satisfying the use requirements of the aluminum alloy cartridge case and efficiently and rapidly completing the preparation of the ceramic layer.

Description

Tool equipment and method for preparing closed cylindrical inner cavity ceramic layer
Technical Field
The invention relates to the technical field of surface treatment, in particular to tooling equipment and a method for preparing a closed cylindrical inner cavity ceramic layer.
Background
The aluminum alloy has the characteristics of light weight and high strength, and has increasingly replaced traditional materials such as steel, copper and the like in the fields of aviation, aerospace, automobiles, mechanical manufacturing, ships, chemical industry and the like, so that the aluminum alloy becomes a non-ferrous metal structural material which is most widely applied in the industry. Under some special working conditions, the cylindrical inner cavity of the aluminum alloy closing-in needs to be contacted with high-temperature gas, such as an aluminum alloy cartridge case, an aluminum alloy cartridge case and the like; however, because the aluminum alloy has active chemical properties and low melting point (about 660 ℃), the problem of ablation must occur once the aluminum alloy contacts high-temperature fuel gas, and therefore, a coating must be adopted in the cylindrical inner cavity of the aluminum alloy closed-up tube for ablation resistance protection.
The micro-arc oxidation is a technology for generating a ceramic layer in situ by micro-area plasma sintering by using an electrochemical method, and the ceramic layer is applied to Al generated on the surface of the aluminum alloy2O3The ceramic layer has excellent properties of high melting point, low thermal conductivity, wear resistance, corrosion resistance and the like, and is very suitable for preparing a ceramic coating in the cylindrical inner cavity of the aluminum alloy closed-up tube for ablation resistance protection.
However, because the necking cylinders such as the aluminum alloy cartridge case and the aluminum alloy cartridge case are of a cylinder structure with a deep inner hole and a large length-diameter ratio, if the micro-arc oxidation is directly carried out, the problems that the ceramic layer grows fast on the outer wall and slowly grows on the inner wall of the aluminum alloy necking cylinder can occur; in order to ensure that the thickness of the ceramic layer of the cylindrical inner cavity of the aluminum alloy closing-in can meet the requirement of the aluminum alloy on ablation resistance protection, the traditional method is to coat the outer wall of the cylindrical aluminum alloy closing-in by using a heat-shrinkable tube or an insulating tool and then perform micro-arc oxidation, and only the inner wall participates in reaction, but the method has the defects of complex process flow, high cost, influence on appearance due to liquid leakage and the like.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide tooling equipment for preparing a necking cylindrical inner cavity ceramic layer, which solves the problems of high growth speed of an outer wall ceramic layer and low growth speed of an inner cavity ceramic layer in the micro-arc oxidation process of an aluminum alloy necking cylindrical shape.
Another object of the present invention is to provide a method for preparing a necked-in cylindrical inner cavity ceramic layer.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a tool equipment for preparing close up cylindric inner chamber ceramic layer which characterized in that: the device comprises a support plate and a cathode fixing plate, wherein the support plate is fixedly connected with the cathode fixing plate through two support rods, the support plate and the cathode fixing plate are parallel to each other, and the cathode fixing plate is positioned above the support plate; a plurality of conductive columns are uniformly arranged on the upper surface of the supporting plate and in an area between the two supporting rods, each conductive column is of a boss-shaped structure and comprises an upper end protruding part and a lower end bearing part, the closing-up cylindrical workpiece is positioned above the corresponding conductive column, the protruding part of the upper end of each conductive column is matched with a hole in the middle of the lower end of the closing-up cylindrical workpiece, the upper surface of the lower end bearing part of each conductive column is coplanar with the bottom surface of the corresponding closing-up cylindrical workpiece, and the closing-up cylindrical workpiece is fixed and limited through the corresponding conductive; an anode power connection screw is arranged on one side, away from the conductive column, of the support plate, which is positioned on the support rod; a plurality of cathode rods are arranged on the cathode fixing plate corresponding to the conductive columns and are perpendicular to the cathode fixing plate, the cathode rods extend into the closing-up cylindrical workpiece, and the central axes of the cathode rods, the closing-up cylindrical workpiece and the conductive columns are on the same straight line; the cathode rod is of a rod-shaped structure with a small upper part and a large lower part, and the shortest distances between the circumferential outer wall of the cathode rod and the circumferential inner wall of the closing-up cylindrical workpiece corresponding to the cathode rod are all consistent, namely, the distance between the small diameter of the upper end of the cathode rod and the closing-up cylindrical workpiece closing-up opening, the large diameter of the lower end of the cathode rod and the non-closing-up opening of the lower end of the closing-up cylindrical workpiece are equal to the distance between the small diameter of the outer wall of the upper end of the cathode rod and the non-closing-up opening of the lower end of the closing-up cylindrical workpiece, and the distance between the end surface of the lowest end of the cathode rod and the upper end surface of the inner wall of the bottom; and a cathode electricity connecting screw is arranged on one side, away from the cathode rod, of the support rod of the cathode fixing plate.
When the shell body is used, the temperature of the inner wall of the shell body is far higher than that of the outer wall of the shell body, so that the ceramic layer to be prepared is required to meet the characteristics of thick inner part and thin outer part; if the growth rate of the outer wall ceramic layer is greater than or equal to that of the inner wall ceramic layer (namely, the thicknesses of the inner wall and the outer wall are consistent or the thickness of the outer wall is higher than that of the inner wall), the thickness of the outer wall is obviously higher than the required thickness, and because the thicknesses of the inner wall and the outer wall are grown simultaneously, great energy waste can be caused, the preparation time is prolonged, the preparation efficiency is reduced, and the preparation cost is increased. According to the invention, through the matching of the conductive column, the cathode rod and the necking cylinder workpiece, the distribution density of an electric field and current is changed, the rapid and uniform growth of the ceramic layer on the inner wall is realized, and the ceramic layer on the outer wall slowly grows, so that the ceramic layer with thick inner part and thin outer part of the necking cylinder workpiece is formed, and the energy and the cost are saved while the use requirements of the aluminum alloy cartridge case and the aluminum alloy cartridge case are met.
Preferably, in order to ensure that the current density of each conductive column is uniformly distributed, two anodic power connection screws are arranged and are respectively positioned at two ends of the supporting plate.
For further optimization, the supporting plate, the anode power connection screw and the conductive column are all made of aluminum alloy materials; in order to avoid the conduction of stainless steel nuts and stainless steel screws on the support rods when the ceramic layer is prepared in the electrolyte, the support plate is coated with a layer of insulating material.
For further optimization, the support rod is respectively and fixedly connected with the support plate and the cathode fixing plate through nuts; the nut is made of stainless steel materials.
In a further optimization, the support rod is made of nylon materials.
Further optimized, the cathode rod, the cathode fixing plate and the cathode electric connection screw are all made of stainless steel materials.
And further optimizing, wherein the closing-up cylindrical workpiece is made of an aluminum alloy material.
Further optimization is carried out, and the maximum diameter of the cathode rod is 1/10-1/2 of the maximum diameter of the inner wall of the closing-up cylindrical workpiece.
Preferably, the upper surface of the protruding part at the upper end of the conductive column is lower than the inner wall of the bottom surface of the closing-up cylindrical workpiece.
And further optimizing, wherein the distance between the lower surface of the cathode fixing plate and the upper end surface of the closing-up cylindrical workpiece is more than 25 mm.
Further optimization, the method for preparing the ceramic layer by the tool equipment specifically comprises the following steps: firstly, vertically placing the tooling equipment fixedly provided with the closing-up cylindrical workpiece in an electrolyte tank, and adding electrolyte, wherein the distance between the upper end surface of the closing-up cylindrical workpiece and the liquid level of the electrolyte is 10-20 mm; then connecting the anode power connection screw with the positive electrode of the power supply, connecting the cathode power connection screw with the negative electrode of the power supply, and directly connecting the electrolyte tank with the cathode; setting micro-arc oxidation parameters to complete the preparation of the micro-arc oxidation ceramic layer; and finally, directly immersing the closed-up cylindrical workpiece subjected to micro-arc oxidation into flowing cold water for cleaning, and placing the cleaned closed-up cylindrical workpiece in an oven for drying.
Further optimized, the electrolyte is composed of NaOH and Na2SiO3、Na2WO4、NaB4O7And deionized water.
Further optimized, the concentration of NaOH is 1-12 g/L, Na2SiO3The concentration is 10-40 g/L, Na2WO4Concentration of 1-10 g/L, NaB4O7The concentration is 1-12 g/L.
Further optimizing, the micro-arc oxidation parameters are specifically as follows: positive current density 2-8A/dm2Negative current density of 0.5 to 2A/dm2The frequency is 100-1000 Hz, the duty ratio is 5-50%, and the oxidation time is 10-180 min.
Further optimizing, wherein the cleaning time is 4-6 min; the drying temperature is 70-90 ℃.
The invention has the following technical effects:
according to the device, the positive current density of the inner wall of the closing-up cylindrical workpiece is larger than that of the outer wall by arranging the conductive columns with the boss-shaped structures, and the arrangement of the shapes and specific positions of the cathode rods is matched, so that the electric field distribution of the closing-up cylindrical outer wall and the inner wall is changed, the electric field weakening of the closing-up cylindrical outer wall and the electric field strengthening of the closing-up cylindrical inner wall are realized, the rapid and uniform growth of the ceramic layer on the inner wall is further realized, the ceramic layer on the outer wall slowly and uniformly grows, and the preparation of the ceramic layer on the closing-up cylindrical workpiece with the thick inner part. In addition, the tooling equipment does not adopt any insulating material to coat the outer wall of the closing-up cylinder or the outer wall of the cathode rod, thereby effectively simplifying the process operation steps and avoiding the waste of used materials.
The equipment and the method realize the in-situ growth of the ceramic layer with the closed cylindrical shape, the thick inner part and the thin outer part, the thickness of the ceramic layer on the inner wall is 10-100 microns adjustable, and the thickness of the ceramic layer on the outer wall is less than 5 microns, so that the use requirements of the aluminum alloy cartridge case and the aluminum alloy cartridge case are met, the energy and the cost are saved, and the preparation time is prolonged and the energy loss is increased when the thickness of the outer wall is more than or equal to that of the inner wall; so that the process of preparing the ceramic layer conforms to the principles of industrial economy and high efficiency. Meanwhile, the tool equipment has the advantages of high production efficiency, simple operation, good surface quality and high coating uniformity.
Drawings
Fig. 1 is a schematic structural diagram of tooling equipment in an embodiment of the present invention.
Wherein, 1, cathode bar; 2. a support bar; 3. a nut; 4. a cathode fixing plate; 5. an anode power connection screw; 6. a support plate; 7. a conductive post; 8. a cathode contact screw; 9. closing up the cylindrical workpiece.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
as shown in figure 1, a tooling equipment for preparing a cylindrical inner cavity ceramic layer of a closing-up is characterized in that: the device comprises a support plate 6 and a cathode fixing plate 4, wherein the support plate 6 is fixedly connected with the cathode fixing plate 4 through two support rods 2, and the support rods 2 are respectively fixedly connected with the support plate 6 and the cathode fixing plate 4 through nuts 3; the nut 3 is made of stainless steel material, and the support rod 2 is made of nylon material. The support plate 4 and the cathode fixing plate 6 are parallel to each other, and the cathode fixing plate 6 is positioned above the support plate 4; a plurality of conductive columns 7 are uniformly arranged on the upper surface of the supporting plate 4 and the area between the two supporting rods 2, each conductive column 7 is of a boss-shaped structure and comprises an upper end protruding part and a lower end bearing part, the closing-up cylindrical workpiece 9 is positioned above the conductive column 7, the protruding part of the upper end of the conductive column 7 is matched with a hole in the middle of the lower end of the closing-up cylindrical workpiece 9, the upper surface of the lower end bearing part of the conductive column 7 is coplanar with the bottom surface of the closing-up cylindrical workpiece 9, and the closing-up cylindrical workpiece 9 is fixed and limited; the upper surface of the upper end protruding part of the conductive column 7 is lower than the inner wall of the bottom surface of the closing-up cylindrical workpiece 9 (as shown in fig. 1). An anode power connection screw 5 is arranged on one side, away from the conductive column 7, of the support plate 6 on the support rod 2; the supporting plate 6, the anode connecting screw 5 and the conductive column 7 are all made of aluminum alloy; in order to avoid the conduction of the stainless steel nut 3 and the stainless steel screw on the support rod 2 when the ceramic layer is prepared in the electrolyte, the support plate 6 is coated with a layer of insulating material, which can be thermoplastic insulating material, but the connection among the support plate 6, the anode contact screw 5 and the conductive post 7 does not have the insulating material, so that the current is ensured to flow among the support plate 6, the anode contact screw 5 and the conductive post 7. In order to ensure that the current density of each conductive column 7 is uniformly distributed, two anodic electrical connection screws 5 are respectively arranged at two ends of the supporting plate 2, namely at two ends of the supporting plate 6 outside the two supporting rods 2. A plurality of cathode rods 1 are arranged on the cathode fixing plate 4 corresponding to the conductive columns 7, the cathode rods 1 are perpendicular to the cathode fixing plate 4, the cathode rods 1 extend into the closing-up cylindrical workpiece 9, and the central axes of the cathode rods 1, the closing-up cylindrical workpiece 9 and the conductive columns 7 are on the same straight line; the maximum diameter M of the cathode rod 1 is 1/10-1/2 of the maximum diameter N of the inner wall of the closing-up cylindrical workpiece 9, namely M = 1/10-1/2N, preferably M = 1/6N. The cathode rod 1 is of a rod-shaped structure with a small top and a large bottom, and the shortest distances between the outer circumferential wall of the cathode rod 1 and the inner circumferential wall of the closing-up cylindrical workpiece 9 corresponding to the cathode rod 1 are all the same, namely, the distance S between the small diameter of the upper end of the cathode rod 1 and the inner wall of the closing-up cylindrical workpiece 9, the large diameter of the lower end of the cathode rod 1 and the non-closing-up opening of the lower end of the closing-up cylindrical workpiece 9, and the distance L between the outer small diameter of the lower end of the cathode rod 1 and the inner wall of the non-closing-up opening of the lower end of the closing-up cylindrical workpiece 9 are the same (namely S = L), and the distance D between the end surface of the lowest end of the cathode rod 1 and the upper end surface of the bottom inner wall of the closing-up; the cathode fixing plate 4 is provided with a cathode connecting screw 8 at one side of the support rod 2 far away from the cathode rod 1. The cathode rod 1, the cathode fixing plate 4 and the cathode electric connection screw 8 are all made of stainless steel materials; the closing-up cylindrical workpiece 9 is made of an aluminum alloy material. The distance between the lower surface of the cathode fixing plate 4 and the upper end surface of the closing-up cylindrical workpiece 9 is more than 25 mm.
The method for preparing the ceramic layer by the tool equipment comprises the following specific steps:
firstly, vertically placing tooling equipment fixedly provided with a closing-up cylindrical workpiece 9 in an electrolyte tank, adding electrolyte, and enabling the upper end face of the closing-up cylindrical workpiece 9 to be 10-20 mm, preferably 15mm, below the liquid level of the electrolyte; the electrolyte is composed of NaOH with the concentration of 1-12 g/L and Na with the concentration of 10-40 g/L2SiO3Na with a concentration of 1-10 g/L2WO4NaB with concentration of 1-12 g/L4O7And deionized water as solvent, wherein the concentration of NaOH is preferably 4g/L,Na2SiO3the concentration is 20g/L, Na2WO4Concentration of 5g/L, NaB4O7The concentration is 4 g/L;
then, the anode connection screw 5 is connected with the positive electrode of the power supply, the cathode connection screw 8 is connected with the negative electrode of the power supply, and the electrolyte tank is not directly connected with the cathode;
setting micro-arc oxidation parameters, starting micro-arc oxidation equipment, and finishing the preparation of a micro-arc oxidation ceramic layer; the micro-arc oxidation parameters are as follows: positive current density 2-8A/dm2Negative current density of 0.5 to 2A/dm2The frequency is 100-1000 Hz, the duty ratio is 5-50%, and the oxidation time is 10-180 min; among them, the positive current density is preferably 4A/dm2Negative current density 1A/dm2Frequency 800Hz, duty ratio 30 percent and oxidation time 40 min.
Finally, directly immersing the closed-up cylindrical workpiece subjected to micro-arc oxidation into flowing cold water for cleaning for 4-6 min, preferably 5min, and placing the cleaned closed-up cylindrical workpiece in an oven to be dried at the drying temperature of 70-90 ℃ and preferably 80 ℃; obtaining the inner cavity Al of the aluminum alloy closing barrel2O3The thickness of the ceramic layer is 10-100 mu m, and the outer wall is Al2O3Less than 5 μm, if prepared according to the preferred scheme, Al in the inner cavity of the aluminum alloy closing-in cylinder2O3The thickness of the ceramic layer is 25-30 μm, and the outer wall is Al2O3The thickness of the ceramic layer is 2-4 mu m, and the thickness of the outer layer is far smaller than that of the inner layer, so that the high-temperature ablation resistance of the inner layer and the effect of preventing the friction of the outer layer from generating heat to damage the aluminum alloy in the aluminum alloy cartridge case and the aluminum alloy cartridge case are realized.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a tool equipment for preparing close up cylindric inner chamber ceramic layer which characterized in that: the device comprises a support plate (6) and a cathode fixing plate (4), wherein the support plate (6) is fixedly connected with the cathode fixing plate (4) through two support rods (2), the support plate (6) is parallel to the cathode fixing plate (4), and the cathode fixing plate (4) is positioned above the support plate (6); a plurality of conductive columns (7) are uniformly arranged on the upper surface of the supporting plate (6) and in an area between the two supporting rods (2), each conductive column (7) is of a boss-shaped structure and comprises an upper end protruding part and a lower end bearing part, the closing-up cylindrical workpiece (9) is positioned above the conductive column (7), the protruding part of the upper end of each conductive column (7) is matched with a hole in the middle of the lower end of the closing-up cylindrical workpiece (9), and the upper surface of the lower end bearing part of each conductive column (7) is coplanar with the bottom surface of the closing-up cylindrical workpiece (9); an anode power connection screw (5) is arranged on one side, away from the conductive post (7), of the support plate (6) on the support rod (2); a plurality of cathode rods (1) are arranged on the cathode fixing plate (4) corresponding to the conductive posts (7), the cathode rods (1) are perpendicular to the cathode fixing plate (4), the cathode rods (1) extend into the closing-up cylindrical workpiece (9), and the central axes of the cathode rods (1), the closing-up cylindrical workpiece (9) and the conductive posts (7) are on the same straight line; the cathode rod (1) is of a rod-shaped structure with a small upper part and a large lower part, the small diameter of the upper end of the cathode rod (1) corresponds to the closing opening of the closing-up cylindrical workpiece (9), the large diameter of the lower end of the cathode rod (1) corresponds to the non-closing opening of the lower end of the closing-up cylindrical workpiece (9), the distance from the outer wall with the small diameter of the upper end of the cathode rod (1) to the inner wall of the closing-up cylindrical workpiece (9) is equal to the distance from the outer wall with the large diameter of the lower end of the cathode rod (1) to the inner wall of the non-closing opening of the lower end of the closing-up cylindrical workpiece (9), and the distance from the end surface of the lowest end of the cathode rod (1) to the upper end surface of the inner wall of the bottom; the cathode fixing plate (4) is located on one side, away from the cathode rod (1), of the support rod (2) and provided with a cathode electric connection screw (8).
2. The tooling equipment for preparing the closed-up cylindrical inner cavity ceramic layer according to claim 1, characterized in that: the supporting plate (6), the anode power connection screw (5) and the conductive post (7) are all made of aluminum alloy.
3. The tooling equipment for preparing the closed-up cylindrical inner cavity ceramic layer according to claim 1, characterized in that: the support rod (2) is respectively fixedly connected with the support plate (6) and the cathode fixing plate (4) through nuts (3); the nut (3) can be made of stainless steel.
4. The tooling equipment for preparing the closed-up cylindrical inner cavity ceramic layer according to claim 1, characterized in that: the supporting rod (2) can be made of nylon materials.
5. The tooling equipment for preparing the closed-up cylindrical inner cavity ceramic layer according to claim 1, characterized in that: the cathode rod (1), the cathode fixing plate (4) and the cathode electric connection screw (8) are all made of stainless steel materials.
6. The tooling equipment for preparing the closed-up cylindrical inner cavity ceramic layer according to claim 1, characterized in that: the closing-up cylindrical workpiece (9) can be made of aluminum alloy material.
7. The method for preparing the ceramic layer of the closed cylindrical inner cavity adopts the tooling equipment as claimed in claim 1, and is characterized in that: firstly, vertically placing tooling equipment fixedly provided with the closing-up cylindrical workpiece (9) in an electrolyte tank, and adding electrolyte, wherein the distance between the upper end surface of the closing-up cylindrical workpiece (9) and the liquid level of the electrolyte is 10-20 mm; then the anode electricity connecting screw (5) is connected with the positive electrode of the power supply, the cathode electricity connecting screw (8) is connected with the negative electrode of the power supply, and the electrolyte tank is not directly connected with the cathode; setting micro-arc oxidation parameters to complete the preparation of the micro-arc oxidation ceramic layer; and finally, directly immersing the opening-closing cylindrical workpiece (9) subjected to micro-arc oxidation into flowing cold water for cleaning, and then placing the workpiece in an oven for drying.
8. The method for preparing a necked-down cylindrical inner cavity ceramic layer according to claim 7, wherein: the electrolyte is composed of NaOH and Na2SiO3、Na2WO4、NaB4O7And deionized water.
9. The method for preparing a necked-down cylindrical inner cavity ceramic layer according to claim 7, wherein: the micro-arc oxidation parameters are specifically as follows: positive current density 2-8A/dm2Negative current density of 0.5 to 2A/dm2The frequency is 100-1000 Hz, the duty ratio is 5-50%, and the oxidation time is 10-180 min.
10. The method for preparing a necked-down cylindrical inner cavity ceramic layer according to claim 7, wherein: the cleaning time can be 4-6 min; the drying temperature can be 70-90 ℃.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113061952A (en) * 2021-03-11 2021-07-02 中国兵器科学研究院宁波分院 Micro-arc oxidation treatment method for aluminum cartridge

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5858300A (en) * 1981-09-30 1983-04-06 Toshiba Corp Anode rod for electroplating inner surface of long-sized metallic pipe
JP2001158993A (en) * 1999-11-30 2001-06-12 Honda Motor Co Ltd Plating apparatus of cylindrical member
CN101012570A (en) * 2006-12-22 2007-08-08 成都发动机（集团）有限公司 Method for plating hard chrome on complex bore element and special fixture therefor
EP2492376A1 (en) * 2009-10-19 2012-08-29 Dipsol Chemicals Co., Ltd. Method of barrel electroplating with aluminum or aluminum alloy
CN203846127U (en) * 2014-05-28 2014-09-24 晋西工业集团有限责任公司 Integral electroplating device for tube workpiece
CN106702451A (en) * 2016-11-28 2017-05-24 中航飞机起落架有限责任公司 Deep blind hole hard anodizing device and machining method of part
CN207176094U (en) * 2017-09-19 2018-04-03 中国兵器工业第五二研究所烟台分所 A kind of equipment for aluminium alloy cylindrical member micro-arc oxidation of inner surface
CN111321452A (en) * 2018-12-17 2020-06-23 联合汽车电子有限公司 Deep inner hole part rack plating structure

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5858300A (en) * 1981-09-30 1983-04-06 Toshiba Corp Anode rod for electroplating inner surface of long-sized metallic pipe
JP2001158993A (en) * 1999-11-30 2001-06-12 Honda Motor Co Ltd Plating apparatus of cylindrical member
CN101012570A (en) * 2006-12-22 2007-08-08 成都发动机（集团）有限公司 Method for plating hard chrome on complex bore element and special fixture therefor
EP2492376A1 (en) * 2009-10-19 2012-08-29 Dipsol Chemicals Co., Ltd. Method of barrel electroplating with aluminum or aluminum alloy
CN203846127U (en) * 2014-05-28 2014-09-24 晋西工业集团有限责任公司 Integral electroplating device for tube workpiece
CN106702451A (en) * 2016-11-28 2017-05-24 中航飞机起落架有限责任公司 Deep blind hole hard anodizing device and machining method of part
CN207176094U (en) * 2017-09-19 2018-04-03 中国兵器工业第五二研究所烟台分所 A kind of equipment for aluminium alloy cylindrical member micro-arc oxidation of inner surface
CN111321452A (en) * 2018-12-17 2020-06-23 联合汽车电子有限公司 Deep inner hole part rack plating structure

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
吴珺仪 等: ""铝合金微弧氧化陶瓷膜表面复合化学镀Ni-P-SiC的研究"", 《表面技术》 *
张先锋 等: ""解决汽车车身内腔电泳漆膜上膜的工艺分析"", 《第三届中国重庆涂料涂装学术大会论文集》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113061952A (en) * 2021-03-11 2021-07-02 中国兵器科学研究院宁波分院 Micro-arc oxidation treatment method for aluminum cartridge

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