CN107022787B - The tooling and application method that hydraulic cylinder surfaces externally and internally is electroplated simultaneously - Google Patents
The tooling and application method that hydraulic cylinder surfaces externally and internally is electroplated simultaneously Download PDFInfo
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- CN107022787B CN107022787B CN201710135471.7A CN201710135471A CN107022787B CN 107022787 B CN107022787 B CN 107022787B CN 201710135471 A CN201710135471 A CN 201710135471A CN 107022787 B CN107022787 B CN 107022787B
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- hydraulic cylinder
- cylinder
- conductive column
- electroplating
- screw thread
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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
- C25D17/06—Suspending or supporting devices for articles to be coated
- C25D17/08—Supporting racks, i.e. not for suspending
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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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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention discloses the tooling application methods that a kind of hydraulic cylinder surfaces externally and internally is electroplated simultaneously, conductive column is put into the cylinder body of hydraulic cylinder first, the bolt of conductive column lower end surface is pierced by from the cylinder bottom valve opening of hydraulic cylinder, then the cylinder mouth internal screw thread of external screw thread ring set and hydraulic cylinder is connected, insulation sleeve is connected on bolt, finally suspension hook is suspended on the cathode bar of electroplating bath, cylinder body of hydraulic oil cylinder is placed in the electroplating bath, is connect conductive column with anode of electrolytic cell by conducting wire.The invention has the advantages that changing existing hydraulic cylinder electroplating copper tin alloy process flow, therefore, processing, the transhipment for reducing hydraulic cylinder are frequent, once upper electroplating assembly line, which can be completed, carries out electroplating copper tin alloy to hydraulic cylinder, improve hydraulic cylinder electroplating efficiency and 50% or more transfer efficiency, production cost decline about 30%.Meanwhile solving hydraulic cylinder bottom valve hole and can not carry out the deficiency of copper-tin alloy plating, extend life of product.
Description
Technical field
The present invention relates to the toolings that mining hydraulic oil cylinder bronze (copper-tin alloy) electroplating uses, and the invention further relates to the users of the tooling
Method.
Background technique
Cu-sn alloy coating has good corrosion resistance, obtains in coal-mine hydraulic support column and jack at present wide
General application, especially in the Minepit environments such as high temperature and humidity, high chloride ion, high sulfate ion, the superiority having is more
It is prominent.
For hydraulic support column oil cylinder, wherein cylinder body inner and outer surfaces can using bronze (copper-tin alloy) electroplating bottoming set hard chrome process
Its corrosion resistance is improved, the service life of cylinder body in extension.Cylinder body electroplating technology is in traditional hydraulic support column: in middle cylinder body
Hole finishing, outer circle roughingHole plating copper tin alloy in middle cylinder bodyCylinder body cylinder bottom in weldingCylinder body in finishing
Outer circleMiddle cylinder justifies bronze (copper-tin alloy) electroplating in vitro.Due to be electroplated use tooling limitation, can only in welding cylinder body cylinder bottom it
Preceding first to carry out inner hole electroplating copper tin alloy, then cylinder body cylinder bottom in welding, then finishes middle cylinder and justifies in vitro, and last centralizing cylinder is external
Circle carries out electroplating copper tin alloy.It is above-mentioned to be to deficiency existing for cylinder body electroplating technology in hydraulic support column: 1, workpiece transhipment frequency
Numerous, production efficiency is low；2, upper electroplating assembly line twice is needed, the electroplating work procedure cost time is longer, and electroplating efficiency is low；3, middle cylinder body
The bottom valve bore dia of cylinder bottom is smaller, can not carry out copper-tin alloy plating, and use process indsole valve opening is caused corrosion phenomena occur, contracting
Short product life.
Summary of the invention
It is an object of that present invention to provide the tooling that a kind of hydraulic cylinder surfaces externally and internally is electroplated simultaneously, the object of the invention is also resided in
The application method of the tooling is provided, the deficiency of copper-tin alloy plating can not be carried out by solving hydraulic cylinder bottom valve hole, extend production
The product service life.
To achieve the above object, the present invention takes following technical proposals:
The tooling that hydraulic cylinder surfaces externally and internally of the present invention is electroplated simultaneously, including cathode connection unit and impressed current anode list
Member；The cathode connection unit includes external screw thread ring set, and the upper surface of the external screw thread ring set is welded with carrier, the carrying
Frame top is located at external screw thread ring set position of center line and is welded with suspension hook, and carrier passes through insulating element and the auxiliary anode unit
It is connected；The auxiliary anode unit by being welded on along the down-set conductive column of external screw thread ring set center line and vertically downward
The bolt of the conductive column lower end surface and the insulation sleeve being threaded on the bolt are constituted.
The carrier is character "door" form structure.
Multiple deflector holes are provided in the axial direction on the side wall of the insulation sleeve.
The insulating element is made of cleat insulator, is passed through positioning pin at the top of the cleat insulator and is welded on carrier
Connecting plate fix, cleat insulator bottom is fixed with the connecting plate for being welded on the conductive column upper surface by positioning pin.
The conductive column is put into the cylinder body of the hydraulic cylinder by the application method of electroplating tooling of the present invention first
Interior, the bolt of conductive column lower end surface is pierced by from the cylinder bottom valve opening of hydraulic cylinder, then by the external screw thread ring set with it is hydraulic
The cylinder mouth internal screw thread of oil cylinder connects, and the insulation sleeve is connected on bolt, the suspension hook is finally suspended on to the yin of electroplating bath
On the thick stick of pole, cylinder body of hydraulic oil cylinder is placed in the electroplating bath, is connect conductive column with anode of electrolytic cell by conducting wire.
The long-pending surface area ratio with electroplating bath two sides anode plate of the cylinder body outer round surface of the hydraulic cylinder is 1:1.5
~2；Relationship between the diameter d of the conductive column and the cylinder inner bore diameter D of hydraulic cylinder are as follows: 0.33D < d < 0.5D.
The invention has the advantages that existing hydraulic cylinder electroplating copper tin alloy process flow is changed, using tooling of the present invention
Hydraulic cylinder electroplating copper tin alloy process flow afterwards are as follows: finishing of internal diameter, outer circle roughingWeld cylinder bottomFinishing
Outer circleSurfaces externally and internally while electroplating copper tin alloy.Therefore, processing, the transhipment for reducing hydraulic cylinder are frequent, once power on
Plating production line, which can be completed, carries out electroplating copper tin alloy to hydraulic cylinder, improves hydraulic cylinder electroplating efficiency and transfer efficiency
50% or more, production cost decline about 30%.Meanwhile it solving hydraulic cylinder bottom valve hole and can not carry out copper-tin alloy plating not
Foot, extends life of product.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of electroplating tooling of the present invention.
Fig. 2 is the left view structural representation (concealing door shape carrier armstand) of Fig. 1.
Fig. 3 is the schematic perspective view of electroplating tooling of the present invention.
Fig. 4 is the structural schematic diagram of cylinder body of hydraulic oil cylinder of the present invention.
Fig. 5 is the structural schematic diagram that cylinder body of hydraulic oil cylinder of the present invention is mounted on the electroplating tooling.
Specific embodiment
As shown in Figs. 1-5, the tooling that hydraulic cylinder surfaces externally and internally of the present invention is electroplated simultaneously, including cathode connection unit
And auxiliary anode unit；The cathode connection unit includes external screw thread ring set 1, and the upper surface of external screw thread ring set 1 is welded with a word
Shape carrier, two armstands 2.1,2.2 and 1 phase of external screw thread ring set of door shape carrier are welded, in the crossbeam 3 of door shape carrier
Portion, which is located at 1 position of center line of external screw thread ring set, is welded with suspension hook 4 and connecting plate 5, door shape carrier by insulating element with
The auxiliary anode unit is connected；Auxiliary anode unit is by conductive column 6 and down-set along 1 center line of external screw thread ring set
The insulation sleeve 8 for being welded on the bolt 7 of 6 lower end surface of conductive column vertically downward and being threaded on bolt 7 is constituted.Insulation division
Part is made of cleat insulator 9.1,9.2, and 9.1,9.2 top of cleat insulator is by positioning pin and is welded on door shape carrier crossbeam
Connecting plate 5 on 3 grips, and cleat insulator 9.1,9.2 bottoms pass through positioning pin and the connection for being welded on 6 upper surface of conductive column
Plate 10 grips.In order to make the diffusion and circulation of the inside and outside portion's electrodeposit solution of cylinder body of hydraulic oil cylinder 11 in electroplating process, make to be electroplated
Electroplating solution reaches stable in the inside and outside concentration of cylinder body 11 in slot, thus guarantee the uniformity of the inside and outside thickness of coating of cylinder body 11,
Multiple deflector holes 12 are provided in the axial direction on the side wall of insulation sleeve 8.
The conductive column 6 is put into the cylinder body of the hydraulic cylinder by the application method of electroplating tooling of the present invention first
In 11, the bolt 7 of 6 lower end surface of conductive column is pierced by except cylinder bottom from the cylinder bottom valve opening 13 of hydraulic cylinder, then will be described outer
Screw thread ring set 1 is connect with the cylinder mouth internal screw thread 14 of hydraulic cylinder, by the insulation sleeve 8 be connected on bolt 7 by cylinder body 11 with lead
Electric column 6 is dielectrically separated from, and finally the suspension hook 4 is suspended on the cathode bar of electroplating bath, and cylinder body of hydraulic oil cylinder 11 is placed in plating
In slot, conductive column 6 is connect with anode of electrolytic cell by conducting wire.
The long-pending surface area ratio with electroplating bath two sides anode plate of 11 outer round surface of cylinder body of the hydraulic cylinder are as follows: 1:1.5
~2；Relationship between the 11 diameter of bore D of diameter d and cylinder body of conductive column 6 are as follows: 0.33D < d < 0.5D, to guarantee in cylinder body 11
Hole coating is uniform.
Electroplating copper tin alloy electroplate liquid formulation:
Cuprous cyanide: 25-30 grams per liter；Sodium stannate: 11-25 grams per liter；Cymag: 16-30 grams per liter；
Sodium hydroxide: 6-14 grams per liter.
The process conditions of use are as follows: 3 ampere/square decimeter of current density, copper-tin alloy bath temperature are 50-60 DEG C.
Claims (3)
1. the tooling that a kind of hydraulic cylinder surfaces externally and internally is electroplated simultaneously, including cathode connection unit and auxiliary anode unit；It is special
Sign is: the cathode connection unit includes external screw thread ring set, and the upper surface of the external screw thread ring set is welded with carrier, described
Carrier top is located at external screw thread ring set position of center line and is welded with suspension hook, and carrier passes through insulating element and the impressed current anode
Unit is connected；The auxiliary anode unit by welding along the down-set conductive column of external screw thread ring set center line and vertically downward
It connects and is constituted in the bolt of the conductive column lower end surface and the insulation sleeve that is threaded on the bolt；The insulation sleeve
Multiple deflector holes are provided in the axial direction on side wall；The insulating element is made of cleat insulator, is passed through at the top of the cleat insulator
Positioning pin is fixed with the connecting plate being welded on carrier, and cleat insulator bottom is by positioning pin and is welded on the conductive column
The connecting plate of end face is fixed.
2. the tooling that hydraulic cylinder surfaces externally and internally is electroplated simultaneously according to claim 1, it is characterised in that: the carrier is
Character "door" form structure.
3. the application method of electroplating tooling as described in claim 1, it is characterised in that: the conductive column is put into the liquid first
In the cylinder body of compressing cylinder, the bolt of conductive column lower end surface is pierced by from the cylinder bottom valve opening of hydraulic cylinder, then by the outer spiral shell
The connection of the cylinder mouth internal screw thread of line ring set and hydraulic cylinder, the insulation sleeve is connected on bolt, is finally hung the suspension hook
On the cathode bar of electroplating bath, cylinder body of hydraulic oil cylinder is placed in the electroplating bath, it is by conducting wire that conductive column and electroplating bath is positive
Pole connection；The long-pending surface area ratio with electroplating bath two sides anode plate of the cylinder body outer round surface of the hydraulic cylinder is 1:
1.5~2；Relationship between the diameter d of the conductive column and the cylinder inner bore diameter D of hydraulic cylinder are as follows: 0.33D < d < 0.5D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710135471.7A CN107022787B (en) | 2017-03-08 | 2017-03-08 | The tooling and application method that hydraulic cylinder surfaces externally and internally is electroplated simultaneously |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710135471.7A CN107022787B (en) | 2017-03-08 | 2017-03-08 | The tooling and application method that hydraulic cylinder surfaces externally and internally is electroplated simultaneously |
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| Publication Number | Publication Date |
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| CN107022787A CN107022787A (en) | 2017-08-08 |
| CN107022787B true CN107022787B (en) | 2019-06-14 |
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| CN201710135471.7A Active CN107022787B (en) | 2017-03-08 | 2017-03-08 | The tooling and application method that hydraulic cylinder surfaces externally and internally is electroplated simultaneously |
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| CN109183136B (en) * | 2018-10-29 | 2021-01-15 | 大连海事大学 | Anode structure for repairing large-size inner hole iron plating and application |
| CN109402687B (en) * | 2018-11-27 | 2020-07-21 | 中国航发贵州黎阳航空动力有限公司 | Inner and outer surface chromium plating device for ball seat |
| CN110592645B (en) * | 2019-09-23 | 2021-08-17 | 徐州徐工液压件有限公司 | Novel electroplating hanger for inner wall of oil cylinder |
| CN110886005B (en) * | 2019-12-06 | 2021-04-16 | 隆鑫通用动力股份有限公司 | Anode assembly for cylinder body outside-tank electroplating |
| CN110904477A (en) * | 2019-12-26 | 2020-03-24 | 国营第六一六厂 | Tinned device of thin wall sleeve part hole protection |
| CN112853450A (en) * | 2020-12-29 | 2021-05-28 | 石家庄飞机工业有限责任公司 | Method for manufacturing series-connected auxiliary anode for electroplating of inner hole part |
| CN113502517B (en) * | 2021-06-30 | 2023-04-18 | 郑州煤矿机械集团股份有限公司 | Surface treatment method for electroplating multilayer gradient tin-copper alloy on hydraulic support oil cylinder |
| CN113789555B (en) * | 2021-08-31 | 2022-11-29 | 郑州煤矿机械集团股份有限公司 | Method for electroplating copper-tin alloy on hydraulic oil cylinder |
| CN117947483B (en) * | 2024-03-27 | 2024-06-04 | 德普卡勒(中国)机械有限公司 | Tool for simultaneously electroplating inner surface and outer surface of hydraulic cylinder and application method |
| CN118087004A (en) * | 2024-04-17 | 2024-05-28 | 沂水众鑫机械有限公司 | Hard chromium plating mechanism and process for hydraulic oil cylinder |
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| CN104831325A (en) * | 2015-06-08 | 2015-08-12 | 中国南方航空工业(集团)有限公司 | Output shaft chrome plating method and output shaft chrome plating fixture |
| CN105696061A (en) * | 2016-04-12 | 2016-06-22 | 合肥长源液压股份有限公司 | Electroplating clamp for barrel-shaped workpiece |
| CN206570418U (en) * | 2017-03-08 | 2017-10-20 | 郑州煤矿机械集团股份有限公司 | The frock electroplated simultaneously for hydraulic jack surfaces externally and internally |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0435422Y2 (en) * | 1986-12-17 | 1992-08-21 |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831325A (en) * | 2015-06-08 | 2015-08-12 | 中国南方航空工业(集团)有限公司 | Output shaft chrome plating method and output shaft chrome plating fixture |
| CN105696061A (en) * | 2016-04-12 | 2016-06-22 | 合肥长源液压股份有限公司 | Electroplating clamp for barrel-shaped workpiece |
| CN206570418U (en) * | 2017-03-08 | 2017-10-20 | 郑州煤矿机械集团股份有限公司 | The frock electroplated simultaneously for hydraulic jack surfaces externally and internally |
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| CN107022787A (en) | 2017-08-08 |
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Effective date of registration: 20200728 Address after: 450016 No. ninth, 167 Avenue, Zhengzhou economic and Technological Development Zone, Henan Co-patentee after: Zhengmei Zhiding Hydraulic Co., Ltd Patentee after: ZHENGZHOU COAL MINING MACHINERY GROUP Co.,Ltd. Address before: 450016 No. ninth, 167 Avenue, Zhengzhou economic and Technological Development Zone, Henan Patentee before: ZHENGZHOU COAL MINING MACHINERY GROUP Co.,Ltd. |