CN109402691B - Small hole chromium plating device - Google Patents
Small hole chromium plating device Download PDFInfo
- Publication number
- CN109402691B CN109402691B CN201811426524.1A CN201811426524A CN109402691B CN 109402691 B CN109402691 B CN 109402691B CN 201811426524 A CN201811426524 A CN 201811426524A CN 109402691 B CN109402691 B CN 109402691B
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- Prior art keywords
- hole
- electrode
- current
- upper base
- conducting plate
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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
- C25D7/00—Electroplating characterised by the article coated
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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
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
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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
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
Abstract
The invention discloses a small-hole chromium plating device, which comprises a conductive plate (1) which is connected with a cathode of a tank body and is a conductor, a lower base (2), a hook (5), an electrode (3) which is positioned above the conductive plate (1), is connected with an anode of the tank body and is a conductor, and an upper base (4) which is used as an insulator. The part of the invention is simple and convenient to clamp and disassemble and is stable; the device has good electric conduction, the condition that a chromium plating surface has no plating layer can not occur, and the isolation of the electrode serving as an auxiliary anode and the cathode is fully ensured by the material of the upper base; the ventilation volume of the exhaust through hole is fully designed, the airflow is smooth, and the defects of coating bulge, poor binding force and the like are effectively prevented; the design of the auxiliary anode electrode bar is reasonable, the fixing mode is simple, convenient and effective, the coaxiality with the inner hole of the part can be ensured, and the plating layer is uniform and delicate; the second screw can be used to adjust the position of the part relative to the electrode, ensuring the coaxiality and the distance between the electrode and the inner wall of the part.
Description
Technical Field
The invention relates to a device for plating chromium on a small-hole part, belonging to the technical field of surface treatment of metal materials.
Background
The chromium plating solution has poor dispersion capability and low cathode current efficiency, so that a uniform and fine plating layer is difficult to obtain during chromium plating, particularly, the qualified plating layer is extremely difficult to obtain aiming at small-aperture chromium plating, and the plating layer quality can be influenced by the factors such as the conductivity of a chromium plating clamp and a part, the liquidity of the solution in the hole, the problem of exhaust in the hole, the problem of coaxiality of an auxiliary anode and the part and the like.
At present, the small-hole chromium plating needs a part fixing device and an auxiliary anode, but the clamping mode of a clamp, the auxiliary anode, a conductive system, an exhaust hole design and the like are different according to different part shapes and process requirements. In the processing process, the problems of inconvenient clamping, poor electric conduction, unsmooth exhaust, uneven plating and the like can be caused.
Disclosure of Invention
The invention aims to provide a small-hole chromium plating device, which realizes good electric conduction between a part and a clamp, smooth exhaust in a hole, coaxiality of an auxiliary anode and an inner hole of the part and improvement of uniformity of a chromium coating of the inner hole of the part, and particularly solves the following three problems:
(1) the problem of electric conduction is solved: the part is electrically conducted with the cathode of the tank body, the auxiliary anode is electrically conducted with the anode of the tank body, and the cathode and the anode cannot be electrically conducted (except in the tank liquor), and the device is convenient for clamping the part;
(2) the electrode generates bubbles due to side reaction, the aperture of the part is small, the air exhaust is difficult, and the problems of air exhaust and liquid circulation of the tank in the hole are solved;
(3) because the bore diameter of the inner bore of the part is different, the problem that the auxiliary anode is coaxial with the inner bore of the part is solved, the distance from the surface of the auxiliary anode to the surface of the inner bore of the part is equal, and the current density of the inner surface is ensured to be uniform. The part process requires inner hole chromium plating, and the plating thickness is 25 μm.
A small hole chromium plating device comprises a current-conducting plate, a lower base, a hook, an electrode and an upper base, wherein the current-conducting plate is connected with a cathode of a bath body and is a conductor;
the lower end of the current-conducting plate is detachably connected with the lower base, the lower base is provided with a first through hole coaxial with the part positioning through hole, and the outer side of the lower base is provided with a hook detachably connected with the current-conducting plate;
the electrode penetrates through a second through hole in the upper base;
and a first screw with an axis vertical to the axis of the second through hole is in threaded connection with the side surface of the upper base, and a plurality of airflow through holes are further formed in the upper base.
Preferably, the lower end face of the current-conducting plate is provided with a positioning groove, a lower base is arranged in the groove, the lower base is cylindrical, a circle of annular mounting edge is arranged on the outer surface of the lower base, and the annular mounting edge is connected with the current-conducting plate through a second screw.
Preferably, the upper base is a tubular member made of glass fiber reinforced plastic and provided with an upper end face, the upper end face is provided with a second through hole and an air circulation hole, the side wall of the upper base is provided with a threaded hole, and the inner diameter of an inner cavity of the upper base is larger than the outer diameter of the part.
Preferably, the electrode is in a stepped cylindrical shape, and the lower end of the electrode is located in the first through hole.
Preferably, the axis of the air flow through hole is parallel to the second through hole.
Preferably, the hook is connected to the conductive plate by a bolt and a nut.
Compared with the prior art, the invention has the following characteristics:
(1) the part is simple and convenient to clamp and disassemble and is stable;
(2) the device has good electric conduction, the condition that a chromium plating surface has no coating can not occur, and the isolation of an electrode serving as an auxiliary anode and a cathode is fully ensured by the material of the upper base;
(3) the ventilation volume of the exhaust through hole is fully designed, the airflow is smooth, and the defects of coating bulge, poor binding force and the like are effectively prevented;
(4) the design of the auxiliary anode electrode bar is reasonable, the fixing mode is simple, convenient and effective, the coaxiality with the inner hole of the part can be ensured, and the plating layer is uniform and delicate;
(5) the second screw can be used to adjust the position of the part relative to the electrode, ensuring the coaxiality and the distance between the electrode and the inner wall of the part.
Drawings
FIG. 1 is a schematic view showing a state in which a chromium-plated part is clamped in a small-hole chromium-plating apparatus of the present invention;
in the figure: 1-a conductive plate; 2-lower base; 3-an electrode; 4-upper base; 5-hanging hook; 6-first screw; 7-second screw; 8-bolt; 9-a nut; 10-parts.
Detailed Description
The technical solution of the present invention is further explained below with reference to the accompanying drawings, but the claimed protection scope is not limited to the above.
As shown in fig. 1, the small-hole chromium plating device comprises a conductive plate 1 which is connected with the cathode of the tank body and is a conductor, a lower base 2 and a hook 5, an electrode 3 which is positioned above the conductive plate 1 and is connected with the anode of the tank body and is a conductor, and an upper base 4 which is an insulator; a part positioning through hole is formed in the current conducting plate 1, the lower end of the current conducting plate 1 is detachably connected with the lower base 2, a first through hole coaxial with the part positioning through hole is formed in the lower base 2, and a hook 5 detachably connected with the current conducting plate 1 is arranged on the outer side of the lower base 2; the electrode 3 passes through a second through hole on the upper base 4; a first screw 6 with an axis vertical to the axis of the second through hole is connected to the side surface of the upper base 4 in a threaded manner, and a plurality of air flow through holes are further formed in the upper base 4.
Alternatively, the lower end face of the current-conducting plate 1 is provided with a positioning groove, a lower base 2 is arranged in the groove, the lower base 2 is cylindrical, the outer surface of the lower base is provided with a circle of annular mounting edge, and the annular mounting edge is connected with the current-conducting plate 1 through a second screw 7.
Alternatively, the upper base 4 is a tubular member made of glass fiber reinforced plastic with an upper end surface, the inner diameter of the inner cavity of the upper base 4 is larger than the outer diameter of the component 10, the upper end surface of the upper base 4 is provided with a second through hole and an air vent hole, and the side wall of the upper base is provided with a threaded hole.
Alternatively, the electrode 3 has a stepped cylindrical shape, and the lower end thereof is located in the first through hole.
Alternatively, the axis of the airflow through hole is parallel to the second through hole.
Alternatively, the hook 5 is connected to the conductive plate 1 by a bolt 8 and a nut 9.
The small-hole chromium plating device is divided into a part fixing device and an auxiliary anode device, and the part fixing device is connected with the cathode of the tank body and can conduct electricity; the auxiliary anode is connected with the tank body anode and can conduct electricity. The part fixing device mainly comprises a current-conducting plate 1, a lower base 2, a hook 5, a second screw 7, a bolt 8 and a nut 9, wherein a part 10 is fixed on the current-conducting plate 1 and is used for reinforcing the current-conducting plate 1 by the lower base 2, and the hook 5 is arranged at two ends of the current-conducting plate 1. The auxiliary anode device mainly comprises an upper base 4 and an electrode 3, wherein the upper base 4 is provided with 5 through holes, a second through hole in the middle is used for fixing an electrode rod, and the rest 4 airflow through holes are used for gas circulation. The electrode 3 as an auxiliary anode electrode rod is divided into three parts according to the shape of the part 10: the top part is the middle part and the tail part is
The small hole chromium plating device is provided with a cathode conductive path consisting of a hook 5 and a conductive plate 1; the lower base 2 and the conductive plate 1 are mounted with second screws 7 to reinforce the conductive plate 1; connecting an electrode 3 as an auxiliary anode with an anode bar by using a copper wire to form an anode conductive path; and the upper base 4 made of glass fiber reinforced plastic is insulated from the cathode system, and the upper base 4 is provided with an airflow through hole to enhance the solution and gas circulation of an inner hole in the electroplating process. The small-hole chromium plating device is used for manufacturing the anode according to factors such as the shape of a part, the distance between the cathode and the anode and the like, so that the uniformity of a chromium layer is improved; in the chromium plating process, the defects of chromium tumors, poor bonding force and the like are reduced by adopting low-current electroplating.
Claims (4)
1. A small hole chromium plating device is characterized in that: comprises a current-conducting plate (1) which is connected with the cathode of the tank body and is a conductor, a lower base (2) and a hook (5), an electrode (3) which is positioned above the current-conducting plate (1), is connected with the anode of the tank body and is a conductor, and an upper base (4) which is an insulator;
a part positioning through hole is formed in the current-conducting plate (1), the lower end of the current-conducting plate (1) is detachably connected with the lower base (2), a first through hole coaxial with the part positioning through hole is formed in the lower base (2), and a hook (5) detachably connected with the current-conducting plate (1) is arranged on the outer side of the lower base (2);
a positioning groove is formed in the lower end face of the current-conducting plate (1), a lower base (2) is arranged in the groove, the lower base (2) is cylindrical, a circle of annular mounting edge is arranged on the outer surface of the lower base, and the annular mounting edge is connected with the current-conducting plate (1) through a second screw (7);
the electrode (3) penetrates through a second through hole in the upper base (4);
a first screw (6) with an axis vertical to the axis of the second through hole is in threaded connection with the side surface of the upper base (4), the first screw (6) is used for adjusting the position of the part (10) relative to the electrode (3) to ensure the coaxiality and the distance between the electrode (3) and the inner wall of the part (10), and a plurality of airflow through holes are further formed in the upper base (4);
the upper base (4) is a tubular piece made of glass fiber reinforced plastic and provided with an upper end face, a second through hole and an air circulation hole are formed in the upper end face, a threaded hole is formed in the side wall of the upper base, and the inner diameter of an inner cavity of the upper base (4) is larger than the outer diameter of the part (10).
2. The small-hole chromium plating device according to claim 1, characterized in that: the electrode (3) is in a stepped cylinder shape, and the lower end of the electrode is positioned in the first through hole.
3. The small-hole chromium plating device according to claim 1, characterized in that: the axis of the air flow through hole is parallel to the second through hole.
4. The small-hole chromium plating device according to claim 1, characterized in that: the hook (5) is connected with the conductive plate (1) through a bolt (8) and a nut (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811426524.1A CN109402691B (en) | 2018-11-27 | 2018-11-27 | Small hole chromium plating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811426524.1A CN109402691B (en) | 2018-11-27 | 2018-11-27 | Small hole chromium plating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109402691A CN109402691A (en) | 2019-03-01 |
| CN109402691B true CN109402691B (en) | 2021-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811426524.1A Active CN109402691B (en) | 2018-11-27 | 2018-11-27 | Small hole chromium plating device |
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| CN (1) | CN109402691B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115012009B (en) * | 2022-04-14 | 2024-03-01 | 中国航发贵州黎阳航空动力有限公司 | Method and device for local galvanization of complex cast part |
| CN114959850B (en) * | 2022-06-16 | 2024-03-26 | 中国航发贵州黎阳航空动力有限公司 | Chromium plating device for inner hole of sealed shell and mounting method of chromium plating device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3941674A (en) * | 1974-05-31 | 1976-03-02 | Monroe Belgium N.V. | Plating rack |
| 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 |
| CN201704428U (en) * | 2010-05-23 | 2011-01-12 | 宁波轴瓦厂 | Bearing bush plating rack |
| CN103160897B (en) * | 2011-12-18 | 2015-09-09 | 沈阳黎明航空发动机(集团)有限责任公司 | High-pressure turbine axle journal internal diameter narrow limit chrome-plating method |
| CN202482457U (en) * | 2011-12-18 | 2012-10-10 | 沈阳黎明航空发动机(集团)有限责任公司 | Auxiliary device for high pressure turbine journal inner diameter narrow side chromium plating |
| CN104818507B (en) * | 2015-04-02 | 2017-06-06 | 中航飞机股份有限公司西安飞机分公司 | A kind of method for preventing electrodeposited chromium layers blistering at interior barrel part slope |
| CN106702451B (en) * | 2016-11-28 | 2018-08-31 | 中航飞机起落架有限责任公司 | The profound blind hole hard anodized device and processing method of part |
| CN206368205U (en) * | 2016-12-26 | 2017-08-01 | 烟台万斯特有限公司 | A kind of state V, the cylinder sleeve bore chrome-plating clamp of state VI |
| CN206396344U (en) * | 2017-01-16 | 2017-08-11 | 长沙五七一二飞机工业有限责任公司 | A kind of internal diameter chromium plating servicing unit of booster outer barrel |
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