CN104962976A - Automobile part cathode electrophoresis paint surface quality processing technique - Google Patents
Automobile part cathode electrophoresis paint surface quality processing technique Download PDFInfo
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- CN104962976A CN104962976A CN201510416229.8A CN201510416229A CN104962976A CN 104962976 A CN104962976 A CN 104962976A CN 201510416229 A CN201510416229 A CN 201510416229A CN 104962976 A CN104962976 A CN 104962976A
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Abstract
The invention discloses an automobile part cathode electrophoresis paint surface quality processing technique which comprises the following steps: delivering a workpiece to a degreasing tank to perform surface deoiling/stain removal treatment; carrying out surface quality conditioning on the degreased workpiece by using a surface conditioner; delivering the workpiece to a phosphating-solution-filled tank to perform surface phosphating treatment, wherein the electric conductivity of the last phosphated pure water is not higher than 30 mu s/cm, and the pH value is 6.7-7.3; carrying out electrophoresis on the workpiece in an electrophoresis tank solution for 1.5-2.5 minutes; and delivering the workpiece subjected to electrophoresis to a drying room, and drying and curing in a temperature environment of 180-190 DEG C/30 minutes. The technique enhances the qualification rate of the product. The electrophoresis paint has the advantages of uniform surface quality thickness, high adhesive force, high quality and high production efficiency. The method can implement automatic continuous production during construction, and greatly enhances the labor efficiency.
Description
Technical field
The invention belongs to automobile component manufacture field, relate to a kind of automobile component cathode electrodip painting surface quality complete processing.
Background technology
Electrophoresis process is divided into anodic electrophoresis and ability cathode electrophoresis.If coating particle is electronegative, workpiece is anode, and coating particle is called anodic electrophoresis in workpiece deposition film forming under electrical forces effect; Otherwise if coating particle positively charged, workpiece is negative electrode, and coating particle deposits film forming and is called ability cathode electrophoresis on workpiece.
Electrodeposited paint film has plentiful, even, smooth, the smooth advantage of coating, and the hardness of electrodeposited paint film, sticking power, corrosion resistant, impact property, penetrating quality are obviously better than other coating process.
Existing electrophoresis workpieces surface quality is poor, and paint film is thinner, and technical requirements is 20-25 μm, actual measurement 8-13 μm, and workpiece surface quality cannot meet main engine plants' requirement.
Summary of the invention
The object of the present invention is to provide a kind of surface quality good, the automobile component cathode electrodip painting surface quality complete processing that film thickness is high.
Object of the present invention can be achieved through the following technical solutions:
Automobile component cathode electrodip painting surface quality complete processing, above-mentioned technique comprises the step of following order:
Degreasing: workpiece is transported to degreasing tank and carries out surface deoiling process;
Table is adjusted: to workpiece after degreasing, surface quality adjustment is carried out in the adjustment of employing table;
Phosphatization: workpiece is transported in the groove with Phosphating Solution and carries out surface granosealing, after phosphatization, the pure electrical conductivity of water of extreme trace is not 6.7-7.3 higher than 30 μ s/cm, pH;
Electrophoresis: workpiece is placed in electrophoresis groove liquid electrophoresis 1.5-2.5min, adopt the rectifier power supply electrophoresis painting dressing electric current of direct current, ability cathode electrophoresis field workpiece is negative electrode, by forming workpiece surface coating deposition after the omnibus bar of insulation and the anode tube energising of hanger side;
Baking: by the workpiece after electrophoresis, being transported to bakery temperature environment is carry out baking and curing under 180-190 DEG C/30min.
Above-mentioned steps also comprises the workpiece after to degreasing and carries out twice high-pressure spraying.
Above-mentioned steps also comprises the workpiece after to phosphatization and carries out twice high-pressure spraying.
After high-pressure spraying, the cleaning of high pressure pure water is carried out to workpiece surface.
Above-mentioned steps also comprises the workpiece employing ultrafiltrated spray to just having exposed electrophoresis chamber after electrophoresis, reclaims the floating paint of workpiece surface.
Workpiece surface after paint is floated to recovery workpiece surface, carries out the cleaning of double high pressure pure water.
Beneficial effect of the present invention: the product surface quality that present invention process obtains is good, and film thickness reaches 20-25 μm, improves the qualification rate of product; Electrocoating paint surface quality thickness is even, and production efficiency is high, and construction can realize automatic continuous production, greatly raises labour efficiency.
Embodiment
Automobile component cathode electrodip painting surface quality complete processing, its technical process is: and added-degreasing-washing-washing-Biao tune-phosphatization-washing-washing-pure water washes-the floating paint-pure water of electrophoresis-recovery workpiece surface washes-and pure water washes-baking-undercarriage.
Added, exactly workpiece is suspended on the suspension suspender of conveyor chain; Degreasing, is transported to degreasing tank exactly and carries out surface deoiling treating processes by grease-removing agent by workpiece; Washing be successively exactly to degreasing after workpiece carry out twice high-pressure spraying, strengthen degreasing process; Table is adjusted, and namely to workpiece after degreasing, surface quality adjustment process is carried out in the adjustment of employing table; Phosphatization, carries out surface granosealing process by the groove that workpiece is transported to Phosphating Solution.Above-mentioned used grease-removing agent, table are adjusted, Phosphating Solution is purchase on market and obtains.
Washing successively, carries out twice high-pressure spraying to the workpiece after phosphatization exactly, strengthens parkerizing process; Pure water is washed, and is exactly to the workpiece surface after bonderizing, carries out high pressure pure water cleaning process; Electrophoresis, the workpiece cleaned through high pressure pure water is placed in electrophoresis groove liquid, adopt the rectifier power supply electrophoresis painting dressing electric current of direct current, ability cathode electrophoresis field workpiece is negative electrode, by forming the process of workpiece surface coating deposition after the omnibus bar of insulation and the anode tube energising of hanger side, electrocoating paint temperature remains at design optimum temps 28 ± 1 DEG C; Reclaim the floating paint of workpiece surface, ultrafiltrated spray is adopted to the workpiece just having exposed electrophoresis chamber after electrophoresis, reach and remove and reclaim the process that workpiece surface floats paint; Pure water is washed, and is exactly to the workpiece surface after electrophoresis, carries out double high pressure pure water cleaning process; Baking, namely to after electrophoresis through pure water cleaning workpiece surface, be transported to the process that bakery carries out baking and curing under specified temp environment; Undercarriage, exports baking room by the workpiece after oven dry by conveyor chain exactly, from hanging the process that suspender takes off one by one.
Workpiece required before electrophoresis chamber is entered in pre-treatment: without oil rustless, anacidity alkali-free, mechanical impurity, floating grey without phosphatization, workpiece surface phosphatize phosphate coat even compact; After phosphatization, the conductivity indices of extreme trace pure water is very crucial, originally control specific conductivity be at 100-150US/CM, pH remains between 5.8-6.3, in technical solution of the present invention, after its phosphatization, the pure electrical conductivity of water of extreme trace should higher than 30US/CM, PH remains on 6.7-7.3 and is advisable, and after phosphatization, extreme trace pure water conductivity should should not changed higher than 100US/CM in time.
Electrophoresis equipment plays a part key in whole coating equipment, the normal operation of electrophoresis equipment is the basic guarantee generating good electrodeposited paint film, electrophoresis equipment comprises tank liquor circulation system, heat exchange system, filtering system, commutation system, anode system, ultrafiltration system etc., and the management of electrophoresis equipment is the emphasis of every bar electrophoresis line.Filter bag is the key component of the filtering system in electrophoresis equipment.
Filtering system is used for removing the dust granule in tank liquor and other impurity, and filter bag is former selects 50UM precision, and the present invention adopts 25UM precision.
The former steel plate selecting thickness 2.5mm of anode material of anode system, after improving, employing thickness is the acid-resistant stainless steel plate of 3mm, in order to avoid anolyte reveals electrophoresis chamber, reduce electrocoating paint conductivity, guarantee that PH is for remaining between 2.5-5, simultaneously periodic cleaning anode box, makes that anolyte often keeps totally, free from extraneous odour, and by periodic detection pole liquid parameter maintenance pole liquid index in normal range.The length in work-ing life of the anode steel tubing bad anode system be related in electrophoresis equipment of fine quality.
Operating voltage is decided to be 160-200V, and electrophoresis time is decided to be about 2min, and storing temperature is set as 180-190 DEG C/30min." operating voltage " refers to the volts DS of electrophoresis equipment commutation system; When " electrophoresis time " refers to workpiece electrophoresis, the electrophoresis time of commutation system in electrophoresis equipment; When " storing temperature " refers to workpiece electrophoresis, the temperature of the baking vessel in electrophoresis equipment.
Effect after improving: strong adhesion, quality is good, and each position of workpiece can obtain even, level and smooth paint film as places such as internal layer, depression, weld seams, solves the application difficult problem of other coating processs to complex-shaped workpieces; Electrophoresis Realization of Product once hands over inspection qualification rate by original 75%, and fast lifting is 98.5%, reaches user's requirement completely, and wins the consistent favorable comment of client.
Embodiment
Be suspended to by workpiece on the suspension suspender of conveyor chain, be transported in degreasing tank and carry out surface deoiling process, in degreasing tank, grease-removing agent concentration is 170-240g/L, carry out twice high-pressure spraying to the workpiece after degreasing, spray pressure, between 10000-15000 kPa, strengthens degreasing process, to workpiece after spray, adopt 60-80g/L to show adjustment and carry out surface quality adjustment process, after adjustment, workpiece is transported in the groove with Phosphating Solution and carries out surface granosealing, Phosphating Solution concentration is 350-500g/L, after its phosphatization, the pure electrical conductivity of water of extreme trace remains on 20-30US/CM, PH remains on 6.7-7.3, twice high-pressure spraying is carried out to the workpiece after phosphatization, spray pressure is between 12000-18000 kPa, strengthen parkerizing process, carry out 20000 kPas of high pressure pure water cleanings afterwards again, the workpiece cleaned through high pressure pure water is placed in electrophoresis groove liquid, adopt the rectifier power supply electrophoresis painting dressing electric current of direct current, ability cathode electrophoresis field workpiece is negative electrode, by forming workpiece surface coating deposition after the omnibus bar of insulation and the anode tube energising of hanger side, operating voltage is decided to be 160-200V, electrophoresis time is decided to be about 2min, electrocoating paint temperature remains at design optimum temps 28 ± 1 DEG C, ultrafiltrated spray is adopted to the workpiece just having exposed electrophoresis chamber after electrophoresis, reach and remove and reclaim the object that workpiece surface floats paint, double 20000 kPas of high pressure pure water cleaning processes afterwards, baking, namely to after electrophoresis through pure water cleaning workpiece surface, be transported to bakery and carry out baking and curing under specified temp environment, storing temperature is set as 180-190 DEG C/30min, workpiece after drying is exported baking room by conveyor chain, takes off one by one from suspension suspender.
Above content is only citing made for the present invention and explanation; affiliated those skilled in the art make various amendment to described specific embodiment or supplement or adopt similar mode to substitute; only otherwise depart from invention or surmount this scope as defined in the claims, protection scope of the present invention all should be belonged to.
Claims (6)
1. automobile component cathode electrodip painting surface quality complete processing, is characterized in that, above-mentioned technique comprises the step of following order:
Degreasing: workpiece is transported to degreasing tank and carries out surface deoiling process;
Table is adjusted: to workpiece after degreasing, surface quality adjustment is carried out in the adjustment of employing table;
Phosphatization: workpiece is transported in the groove with Phosphating Solution and carries out surface granosealing, after phosphatization, the pure electrical conductivity of water of extreme trace is not 6.7-7.3 higher than 30 μ s/cm, pH;
Electrophoresis: workpiece is placed in electrophoresis groove liquid electrophoresis 1.5-2.5min, adopt the rectifier power supply electrophoresis painting dressing electric current of direct current, ability cathode electrophoresis field workpiece is negative electrode, by forming workpiece surface coating deposition after the omnibus bar of insulation and the anode tube energising of hanger side;
Baking: by the workpiece after electrophoresis, being transported to bakery temperature environment is carry out baking and curing under 180-190 DEG C/30min.
2. automobile component cathode electrodip painting surface quality complete processing according to claim 1, is characterized in that: above-mentioned steps also comprises the workpiece after to degreasing and carries out twice high-pressure spraying.
3. automobile component cathode electrodip painting surface quality complete processing according to claim 1, is characterized in that: above-mentioned steps also comprises the workpiece after to phosphatization and carries out twice high-pressure spraying.
4. automobile component cathode electrodip painting surface quality complete processing according to claim 3, is characterized in that: after high-pressure spraying, carries out the cleaning of high pressure pure water to workpiece surface.
5. automobile component cathode electrodip painting surface quality complete processing according to claim 1, is characterized in that: above-mentioned steps also comprises the workpiece employing ultrafiltrated spray to just having exposed electrophoresis chamber after electrophoresis, reclaims the floating paint of workpiece surface.
6. automobile component cathode electrodip painting surface quality complete processing according to claim 5, is characterized in that: float the workpiece surface after paint to recovery workpiece surface, carries out the cleaning of double high pressure pure water.
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| CN201510416229.8A CN104962976A (en) | 2015-07-14 | 2015-07-14 | Automobile part cathode electrophoresis paint surface quality processing technique |
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| CN201510416229.8A CN104962976A (en) | 2015-07-14 | 2015-07-14 | Automobile part cathode electrophoresis paint surface quality processing technique |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108258181A (en) * | 2018-01-02 | 2018-07-06 | 华霆（合肥）动力技术有限公司 | Insulating protection cylinder manifold and its manufacturing method |
| CN109989091A (en) * | 2019-04-17 | 2019-07-09 | 镇江耐丝新型材料有限公司 | A kind of steel wire electrolytic phosphating system |
| CN113088953A (en) * | 2019-12-23 | 2021-07-09 | 绵阳海立电器有限公司 | Surface treatment method for compressor |
| CN113943965A (en) * | 2021-11-26 | 2022-01-18 | 东风（十堰）汽车螺栓有限公司 | Height-adjustable U-shaped bolt omnibearing intelligent electrophoretic paint coating process |
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| US20080169829A1 (en) * | 2004-01-22 | 2008-07-17 | Zoltan-Josef Horvath | Method and System For Determining the Thickness of a Layer of Lacquer |
| CN101574689A (en) * | 2008-05-07 | 2009-11-11 | 中国第一汽车集团公司 | Energy-saving coating process |
| CN102618907A (en) * | 2012-04-17 | 2012-08-01 | 广州立邦涂料有限公司 | Method for detecting cleanliness of cathode electrophoretic coating production equipment |
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2015
- 2015-07-14 CN CN201510416229.8A patent/CN104962976A/en active Pending
Patent Citations (4)
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| US20080169829A1 (en) * | 2004-01-22 | 2008-07-17 | Zoltan-Josef Horvath | Method and System For Determining the Thickness of a Layer of Lacquer |
| CN101574689A (en) * | 2008-05-07 | 2009-11-11 | 中国第一汽车集团公司 | Energy-saving coating process |
| CN102618907A (en) * | 2012-04-17 | 2012-08-01 | 广州立邦涂料有限公司 | Method for detecting cleanliness of cathode electrophoretic coating production equipment |
| CN103436941A (en) * | 2013-08-19 | 2013-12-11 | 安徽安簧机械股份有限公司 | Electrophoresis apparatus and process suitable for automobile leaf spring |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108258181A (en) * | 2018-01-02 | 2018-07-06 | 华霆（合肥）动力技术有限公司 | Insulating protection cylinder manifold and its manufacturing method |
| CN109989091A (en) * | 2019-04-17 | 2019-07-09 | 镇江耐丝新型材料有限公司 | A kind of steel wire electrolytic phosphating system |
| CN113088953A (en) * | 2019-12-23 | 2021-07-09 | 绵阳海立电器有限公司 | Surface treatment method for compressor |
| CN113943965A (en) * | 2021-11-26 | 2022-01-18 | 东风（十堰）汽车螺栓有限公司 | Height-adjustable U-shaped bolt omnibearing intelligent electrophoretic paint coating process |
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Application publication date: 20151007 |