CN104651916B - Electroplating pretreatment process for insert surface and EDM deep cavity - Google Patents
Electroplating pretreatment process for insert surface and EDM deep cavity Download PDFInfo
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- CN104651916B CN104651916B CN201310580324.2A CN201310580324A CN104651916B CN 104651916 B CN104651916 B CN 104651916B CN 201310580324 A CN201310580324 A CN 201310580324A CN 104651916 B CN104651916 B CN 104651916B
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- workpiece
- electroplated
- plated
- electroplating
- plating
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Classifications
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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
- C25D17/10—Electrodes, e.g. composition, counter electrode
- C25D17/12—Shape or form
-
- 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
Abstract
The invention discloses an electroplating pretreatment process for insert surface and EDM deep cavity. The process includes the following steps: (1), placing the workpiece to be plated on an organic glass plate; (2) uniformly punching a plurality of grid shaped holes on a titanium metal plate, placing the titanium metal plate on the cathode surface of the workpiece to be plated, and arranging the organic glass plate between the titanium metal plate and the periphery of the workpiece to be plated to maintain separation; and (3) fixedly connecting the titanium metal plate and the workpiece to be plated and then electroplating in a plating bath. The invention has the beneficial effect that the design of an auxiliary anode (titanium metal plate) is added based on the original electroplating process. Plating does not form on the titanium metal surface in the electroplating process, so that the metal cation fully loses electrons under the effect of current and so that plating positive ions effectively get electrons and are reduced to atoms for covering the cathode plating; and the a metal protective layer is to protect the edge smoothness of the workpiece to be plated and avoid burr.
Description
Technical field
The present invention relates to the electroplating pretreatment process of electroplating technology, more particularly, to mold insert surface and EDM deep-small holes.
Background technology
At present, in metal plating industry, all simply simple technique.It is that the workpiece to be electroplated is done negative electrode, plating
Metal up is connected on anode, is to exclude the interference of other cationes, and makes coating uniform, firm, need to be with containing coated metal sun
The solution of ion cooks electroplate liquid, to keep the concentration of coated metal cation constant.The purpose of plating is the plated with gold on base material
Category coating, changes substrate surface property or size.Plating can strengthen the corrosion resistance of metal (using corrosion resistant more than coated metal
Metal), increase hardness, prevent from wearing away, improve electric conductivity, lubricity, thermostability and surface aesthetic.
After galvanic power supply is passed in electroplating process, the metal of anode can be aoxidized（Lose electronics）, in solution just
Ion is then in cathodic reduction（Obtain electronics）Into atom and accumulate in negative electrode top layer.In present electroplating process, with common
During plating mode, it is uneven that surface after plating has an electrodeposited coating, or sticks up skin, misty shape etc., and such outward appearance seems just
It is not very attractive in appearance；And in the middle of the relatively deep-small hole workpiece of EDM processing, die cavity bottom surface may have the phenomenon do not plated, and not reach anti-
The effect of rust, and there is obvious aberration in the region not plated with the region for plating, extremely unsightly.
The content of the invention
The technical problem to be solved in the present invention is that existing electroplating technology makes the uneven periphery of plated item overlay coating jagged,
The relatively deep-small hole workpiece bottom of EDM processing does not cross aberration, and for this kind of electricity for mold insert surface and EDM deep-small holes is provided
Plating pre-processing technique.
The technical scheme is that：For mold insert surface and the electroplating pretreatment process of EDM deep-small holes, it includes following
Step：（1）, workpiece to be electroplated is placed on poly (methyl methacrylate) plate；（2）, some latticed holes will be uniformly got on titanium mesh
Hole, is placed on the cathode surface of workpiece to be electroplated, is provided with poly (methyl methacrylate) plate to protect between titanium mesh and workpiece periphery to be electroplated
Hold interval；（3）, in the surface side of titanium mesh be connected with conductive metallic plate；（4）By titanium mesh and workpiece to be electroplated
It is affixed to be then placed in being electroplated in electroplating bath.
Step in such scheme（2）Between middle titanium mesh and workpiece to be electroplated at intervals of 1-10mm.
Step described in such scheme（1）In have coat of metal in workpiece perimeter to be electroplated.
The invention has the beneficial effects as follows on the basis of original electroplating technology, increased complementary anode（Titanium mesh）'s
Design.Titanium surface in chrome-plating process does not have coating, can make fully losing under the function of current for its metal cation
De-electromation, so that plating cation effectively obtains electron reduction and is covered on negative electrode into atom；The effect of coat of metal
It is the periphery planarization for protecting workpiece to be electroplated, it is to avoid the appearance of burr, allows burr to occur in the periphery of coat of metal.
Specific embodiment
With reference to embodiment, the present invention will be further described.
Embodiment 1：Including（1）, workpiece to be electroplated is placed on poly (methyl methacrylate) plate；（2）, will uniformly beat on titanium mesh
Go out some latticed holes, be placed on the cathode surface of workpiece to be electroplated, be provided between titanium mesh and workpiece periphery to be electroplated
Poly (methyl methacrylate) plate with keep interval；（3）, in the surface side of titanium mesh be connected with conductive metallic plate；（4）By titanium
Plate is affixed with workpiece to be electroplated to be then placed in being electroplated in electroplating bath.
Embodiment 2：（1）, workpiece to be electroplated is placed on poly (methyl methacrylate) plate, have gold in workpiece perimeter to be electroplated
Category protective layer；（2）, some latticed holes will be uniformly got on titanium mesh, be placed on the cathode surface of workpiece to be electroplated, titanium
Poly (methyl methacrylate) plate is provided between metallic plate and workpiece periphery to be electroplated to keep interval, at intervals of 1mm；（3）, in titanium mesh
Surface side is connected with conductive metallic plate；（4）, titanium mesh and workpiece to be electroplated affixed be then placed in into electricity by bonding
Electroplated in coating bath.
Embodiment 3：（1）, workpiece to be electroplated is placed on poly (methyl methacrylate) plate, have gold in workpiece perimeter to be electroplated
Category protective layer；（2）, some latticed holes will be uniformly got on titanium mesh, be placed on the cathode surface of workpiece to be electroplated, titanium
Poly (methyl methacrylate) plate is provided between metallic plate and workpiece periphery to be electroplated to keep interval, at intervals of:10mm；（3）, in titanium mesh
Surface side be connected with conductive metallic plate；（4）, titanium mesh and workpiece to be electroplated be then placed in by the way that bolt is affixed
Electroplated in electroplating bath.
Coat of metal is on the one hand by the part that need not be electroplated isolation, it is to avoid burr occurs in the periphery of workpiece to be electroplated,
On the other hand the electric current connection of negative electrode is strengthened.Interval between titanium mesh and workpiece periphery to be electroplated is less, acts on bigger, but
Can not contact with negative electrode.
Netted hole is provided with the middle of titanium mesh, is so in order to electroplate liquid there are more cations to produce in electroplating process
It is raw.Between titanium mesh and workpiece to be electroplated, it is used for isolating with poly (methyl methacrylate) plate, it is to avoid titanium mesh has electric current phase with negative electrode
The probability of connection,（If there is contact to be short circuit between metal）.Finally by titanium mesh screw and minus plate to be plated,
Then just whole device can be put in electroplating bath and be electroplated.By the reinforcement function of current of conductive metallic plate, take
Obtained good conductive effect.Metallic plate can be copper coin, aluminium sheet, iron plate, certainly preferably titanium plate.
The connection on the coat of metal of conductive metallic plate and opposite side on the other side respectively when needing to electroplate
Upper suspender, is put in electroplating bath and prepares plating.
The present invention is exemplarily described above in conjunction with embodiment, it is clear that the present invention is implemented and do not receive above-mentioned side
The restriction of formula, if the improvement of the various unsubstantialities that method of the present invention design and technical scheme are carried out is employed, or without
Improve and the design of the present invention and technical scheme are directly applied to into other occasions, within protection scope of the present invention.
Claims (1)
1. it is used for the electroplating pretreatment process on mold insert surface and EDM deep-small holes, it is characterized in that it is comprised the following steps：（1）, treating
The workpiece of plating is placed on poly (methyl methacrylate) plate, has coat of metal in workpiece perimeter to be electroplated；（2）, by titanium mesh
On uniformly get some latticed holes, be placed on the cathode surface of workpiece to be electroplated, titanium mesh and workpiece periphery to be electroplated
Between be provided with poly (methyl methacrylate) plate to keep the interval of 1-10mm；（3）, in the surface side of titanium mesh be connected with conductive gold
Category plate；（4）It is then placed in being electroplated in electroplating bath by titanium mesh is affixed with workpiece to be electroplated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310580324.2A CN104651916B (en) | 2013-11-19 | 2013-11-19 | Electroplating pretreatment process for insert surface and EDM deep cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310580324.2A CN104651916B (en) | 2013-11-19 | 2013-11-19 | Electroplating pretreatment process for insert surface and EDM deep cavity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104651916A CN104651916A (en) | 2015-05-27 |
| CN104651916B true CN104651916B (en) | 2017-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310580324.2A Active CN104651916B (en) | 2013-11-19 | 2013-11-19 | Electroplating pretreatment process for insert surface and EDM deep cavity |
Country Status (1)
| Country | Link |
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| CN (1) | CN104651916B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544804A (en) * | 2003-11-17 | 2004-11-10 | 烟台万斯特有限公司 | Chromium plating rack for cylinder liner bore |
| CN101899697A (en) * | 2010-08-13 | 2010-12-01 | 上海交通大学 | Electroplating equipment for inner wall auxiliary anode of specially-shaped cavity |
| 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 |
-
2013
- 2013-11-19 CN CN201310580324.2A patent/CN104651916B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544804A (en) * | 2003-11-17 | 2004-11-10 | 烟台万斯特有限公司 | Chromium plating rack for cylinder liner bore |
| CN101899697A (en) * | 2010-08-13 | 2010-12-01 | 上海交通大学 | Electroplating equipment for inner wall auxiliary anode of specially-shaped cavity |
| 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 |
Non-Patent Citations (2)
| Title |
|---|
| 内(盲)孔镀缎面铬辅助阳极的设计;邹坚;《电镀与精饰》;19910930;第13卷(第5期);第41-42页 * |
| 组合式挂具在镀硬铬中的应用;王洪奎;《电镀与精饰》;20080531;第30卷(第5期);第27-29页 * |
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| Publication number | Publication date |
|---|---|
| CN104651916A (en) | 2015-05-27 |
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