CN110552046A - Coating process for collinear electrophoresis of frame and cab - Google Patents
Coating process for collinear electrophoresis of frame and cab Download PDFInfo
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- CN110552046A CN110552046A CN201910939968.3A CN201910939968A CN110552046A CN 110552046 A CN110552046 A CN 110552046A CN 201910939968 A CN201910939968 A CN 201910939968A CN 110552046 A CN110552046 A CN 110552046A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/78—Pretreatment of the material to be coated
- C23C22/80—Pretreatment of the material to be coated with solutions containing titanium or zirconium compounds
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
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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
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/12—Electrophoretic coating characterised by the process 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
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/20—Pretreatment
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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
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/22—Servicing or operating apparatus or multistep processes
Abstract
the invention relates to the technical field of coating, in particular to a coating process for collinear electrophoresis of a frame and a cab. The invention adopts the treatment process of hot water washing of the vehicle frame, hot water washing of the cab, pre-degreasing, primary water washing, secondary water washing, surface conditioning and phosphorization, and in the first procedure of hot water washing, the vehicle frame and the cab are separately cleaned, heavy oil stains and particles on the surface of the vehicle frame are pre-cleaned, and the problem that the vehicle frame cross pollutes the cab is prevented. The subsequent process is in line production, wherein the measures in the invention are adopted in the line production, the tank volume is reduced, the heating quantity and the operation power of a water pump are further reduced, and the operation energy consumption and the investment cost are reduced. The rectification electrophoresis of the electrophoresis adopts the IGBT rectification electrophoresis aiming at the great difference of the frame and the vehicle body products, thereby ensuring the paint film quality requirement of each product.
Description
Technical Field
The invention relates to the technical field of coating, in particular to a coating process for collinear electrophoresis of a frame and a cab.
background
Generally, the salt fog resistance and weather resistance of a truck frame are required to reach 500 hours, so that the bottom-surface integrated electrophoretic paint is adopted for reducing the cost, a finish paint is not needed, the salt fog resistance and weather resistance of a truck cab are higher, namely, the finish paint is required for electrophoresis, the coating lines of the frame and the cab are two independent coating production lines, but with the development of the times, the requirements for the frame are higher and higher, the salt fog resistance and weather resistance of the frame are required to reach double 1000 hours, therefore, the frame is required to be sprayed with the finish paint like the cab, the frame can be subjected to electrophoresis by the electrophoretic paint same as the cab, and therefore, in order to save equipment investment, the production mode of collinear electrophoresis of the frame and the cab is adopted, namely, one electrophoresis line is invested.
however, the alignment of the frame with the cab presents the following problems:
1. the oil stain and roughness on the surfaces of the frame and the cab are different, so that the problem of mutual pollution is caused;
2. the size of the frame is greatly different from that of the cab, and the design of the time slot body cannot meet the passing performance of the frame and the cab when the frame and the cab are collinear;
3. because the structure of the tank body is greatly different from the traditional structure, the problem that the product quality is guaranteed because the particles are settled to death and death cannot be avoided.
disclosure of Invention
Technical problem to be solved
aiming at the defects of the prior art, the invention provides a coating process for collinear electrophoresis of a frame and a cab, which has the advantage of collinear production of the frame and the cab and solves the problems in the background technology.
(II) technical scheme
In order to achieve the technical problem, the invention provides a coating process for collinear electrophoresis of a frame and a cab, which comprises the following steps:
Step one, washing the frame with hot water; step two, washing the cab with hot water; step three, pre-degreasing; step four, degreasing; step five, washing for the first time; step six, washing with water for the second time; seventhly, surface adjustment; step eight, phosphorization; wherein:
in the first step, the frame is immersed in hot water, the water temperature is controlled at 45-55 ℃, the time is 1-3min, so as to remove floating dust attached to the surface of the frame and soften oil stains;
In the second step, the cab is immersed in hot water, the water temperature is controlled at 45-55 ℃, and the time is 1-3min, so that floating dust attached to the surface of the frame is removed, and oil stains are softened;
in the third step, the prepared degreasing cleaning solution is put into the tank body, the concentration of the tank liquid adopts 50-70g/L degreasing agent, the total alkalinity is 20-30 points, the free alkalinity is 7-15 points, the vehicle frame and the cab are soaked in the tank body for 3-6 minutes, the saponification reaction of the degreasing cleaning solution on the grease is utilized to remove the saponifiable grease, and the oil stains on the outer surfaces of the vehicle frame and the cab are removed;
In the fourth step, the concentration of the bath solution of the bath body is the same as the pre-degreasing concentration, the bath body is heated to keep the temperature of the bath body at 55-65 ℃, the soaking time is 3-6 minutes, a circulating pump is adopted for circulating and stirring, and the circulating times are 3 times/h to increase the degreasing effect;
In the fifth step, after degreasing, the outer surfaces of the frame and the cab are cleaned by tap water, and oil stains and degreasing liquid which lose adhesiveness after the outer surfaces of the frame and the cab are saponified are cleaned;
In the sixth step, tap water is adopted again to clean the outer surfaces of the frame and the cab, so that the surfaces of the frame and the cab are smooth;
Placing the frame and the cab in a tank body, adding 3-6g/L of a titanium rubber surface conditioner, controlling the pH to be 8.0-9.0, carrying out circulation stirring for 4-6min at room temperature by adopting a circulating pump, wherein the circulation time is 1.5 times/h, so as to increase the surface conditioning effect;
The surface property of the plate is adjusted, the surface state is improved, the phosphorized crystal is fine, and the phosphorization quality is improved;
in the step eight, the frame and the cab are placed in the groove body, 23-30g/L of phosphating agent and 2-7g/L of accelerator are added, the gas value of the accelerator is 6-8 points, the working temperature is 35-40 ℃, the time is 3.5-6min, and a phosphate protective layer is generated on the surfaces of the frame and the cab.
further, the volume of the groove body is obtained by performing 121m slope planting, the width a of the groove body is 13000mm, and the width b of the groove body is 3800 mm.
Further, the length c of the groove body is 13000mm, and the length d of the groove body is 6500 mm.
further, the depth e of the groove body is 1850mm, and the depth f of the groove body is 3900 mm.
further, the bottom of the area A of the tank body is fixedly connected with a nozzle, and the nozzle faces the area B of the tank body.
Further, the groove body A face is arranged in a downward inclined mode, and the inclination angle of the groove body A face is 2 degrees.
(III) advantageous effects
The invention provides a coating process for collinear electrophoresis of a frame and a cab, which has the following beneficial effects:
1. The coating process of the collinear electrophoresis of the vehicle frame and the cab adopts the treatment processes of hot water washing of the vehicle frame, hot water washing of the cab, pre-degreasing, first water washing, second water washing, surface conditioning and phosphorization, and in the first process of hot water washing, the vehicle frame and the cab are separately cleaned, heavy oil stains and particles on the surface of the vehicle frame are pre-cleaned, and the subsequent process is produced in a joint line, so that the problem that the vehicle frame cross pollutes the cab is solved.
2. the coating process of collinear electrophoresis of the frame and the cab improves the utilization rate of the space of the groove body by improving the shape and limiting the size of the groove body, reduces the energy consumption and reduces the production cost compared with the traditional groove body structure.
3. According to the coating process of collinear electrophoresis of the frame and the cab, through the design of the nozzle and the A surface of the groove body, the problem of particle impurity deposition of the A surface of the groove body is avoided, and the problem of product quality is guaranteed.
drawings
FIG. 1 is a process diagram of the structure of the present invention;
FIG. 2 is a top view of the tank structure of the present invention;
FIG. 3 is a schematic view of the structure of the tank of the present invention;
FIG. 4 is a schematic view of a production mode of the vehicle frame of the present invention;
FIG. 5 is a schematic view of a production mode of the cab of the present invention;
fig. 6 is a rectified power distribution diagram according to the present invention.
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.
referring to fig. 1-6, the present invention will be further described with reference to fig. 1 and the following examples.
the first embodiment is as follows:
a coating process for collinear electrophoresis of a frame and a cab comprises the following steps:
step one, washing the frame with hot water; step two, washing the cab with hot water; step three, pre-degreasing; step four, degreasing; step five, washing for the first time; step six, washing with water for the second time; seventhly, surface adjustment; step eight, phosphorization; wherein:
in the first step, the frame is immersed in hot water, the water temperature is controlled at 45 ℃ for 1min, so as to remove floating dust attached to the surface of the frame and soften oil stains;
in the second step, the cab is immersed in hot water, the water temperature is controlled at 45 ℃ for 1min, so that floating dust attached to the surface of the frame is removed, and oil stains are softened;
in the third step, the prepared degreasing cleaning solution is put into the tank body, the concentration of the tank liquid adopts 50g/L degreasing agent, the total alkalinity is 20 points, the free alkalinity is 7 points, the frame and the cab are soaked in the tank body for 3 minutes, the saponification reaction of the degreasing cleaning solution on the grease is utilized to remove the saponifiable grease, and the oil stains on the outer surfaces of the frame and the cab are removed;
in the fourth step, the concentration of the bath solution of the bath body is the same as the pre-degreasing concentration, the bath body is heated to keep the temperature of the bath body at 55 ℃, the soaking time is 3 minutes, a circulating pump is adopted for circulating stirring, and the circulating times are 3 times/h to increase the degreasing effect;
In the fifth step, after degreasing, the outer surfaces of the frame and the cab are cleaned by tap water, and oil stains and degreasing liquid which lose adhesiveness after the outer surfaces of the frame and the cab are saponified are cleaned;
in the sixth step, tap water is adopted again to clean the outer surfaces of the frame and the cab, so that the surfaces of the frame and the cab are smooth;
And seventhly, placing the frame and the cab in a tank, adding 3g/L of titanium rubber surface conditioner, controlling the pH to be 8.0, carrying out circulation stirring for 1.5 times/h by using a circulating pump for 4min at room temperature. The surface property of the plate is adjusted, the surface state is improved, the phosphorized crystal is fine, and the phosphorization quality is improved;
in the step eight, the frame and the cab are placed in the groove body, 23g/L phosphating agent and 2g/L accelerant are added, the gas value of the accelerant is 6 points, the working temperature is 35 ℃, the time is 3.5min, and a phosphate protective layer is generated on the surfaces of the frame and the cab.
the volume of cell body is 121m, and width a of cell body is 13000mm, and width B of cell body is 3800mm, and the length c of cell body is 13000mm, and the length d of cell body is 6500mm, and the degree of depth e of cell body is 1850mm, and the degree of depth f of cell body is 3900mm, distinguishes the bottom fixedly connected with nozzle at cell body A, and the nozzle is distinguished towards cell body B, and the setting of slope is downwards inclined to cell body A face, and the inclination of cell body A face is 2.
Example two:
a coating process for collinear electrophoresis of a frame and a cab comprises the following steps:
step one, washing the frame with hot water; step two, washing the cab with hot water; step three, pre-degreasing; step four, degreasing; step five, washing for the first time; step six, washing with water for the second time; seventhly, surface adjustment; step eight, phosphorization; wherein:
In the first step, the frame is immersed in hot water, the water temperature is controlled at 50 ℃, the time is 2min, so as to remove floating dust attached to the surface of the frame and soften oil stains;
In the second step, the cab is immersed in hot water, the water temperature is controlled at 50 ℃, and the time is 2min, so that floating dust attached to the surface of the frame is removed, and oil stains are softened;
in the third step, the prepared degreasing cleaning solution is put into the tank body, the concentration of the tank liquid adopts 60g/L degreasing agent, the total alkalinity is 25 points, the free alkalinity is 9 points, the frame and the cab are soaked in the tank body for 5 minutes, the saponification reaction of the degreasing cleaning solution on the grease is utilized to remove the saponifiable grease, and the oil stains on the outer surfaces of the frame and the cab are removed;
in the fourth step, the concentration of the bath solution of the bath body is the same as the pre-degreasing concentration, the bath body is heated to keep the temperature of the bath body at 60 ℃, the soaking time is 5 minutes, and the bath solution is stirred by compressed air;
in the fifth step, after degreasing, the outer surfaces of the frame and the cab are cleaned by tap water, and oil stains and degreasing liquid which lose adhesiveness after the outer surfaces of the frame and the cab are saponified are cleaned;
in the sixth step, tap water is adopted again to clean the outer surfaces of the frame and the cab, so that the surfaces of the frame and the cab are smooth;
placing the frame and the cab in a tank body, adding 4g/L of a titanium rubber surface conditioner, controlling the pH value to be 8.0, performing circulation stirring for 5min at room temperature by using compressed oil-free air, adjusting the surface property of the plate, improving the surface state, enabling the phosphated crystal to be fine and dense, and improving the phosphated quality;
In the step eight, the frame and the cab are placed in the groove body, 28g/L phosphating agent and 4g/L accelerant are added, the gas value of the accelerant is 7 points, the working temperature is 40 ℃, the time is 5min, and a phosphate protective layer is formed on the surfaces of the frame and the cab.
The volume of cell body is 121m, and width a of cell body is 13000mm, and width B of cell body is 3800mm, and the length c of cell body is 13000mm, and the length d of cell body is 6500mm, and the degree of depth e of cell body is 1850mm, and the degree of depth f of cell body is 3900mm, distinguishes the bottom fixedly connected with nozzle at cell body A, and the nozzle is distinguished towards cell body B, and the setting of slope is downwards inclined to cell body A face, and the inclination of cell body A face is 2.
Example three:
A coating process for collinear electrophoresis of a frame and a cab comprises the following steps:
step one, washing the frame with hot water; step two, washing the cab with hot water; step three, pre-degreasing; step four, degreasing; step five, washing for the first time; step six, washing with water for the second time; seventhly, surface adjustment; step eight, phosphorization; wherein:
in the first step, the frame is immersed in hot water, the water temperature is controlled at 55 ℃, the time is 3min, so as to remove floating dust attached to the surface of the frame and soften oil stains;
in the second step, the cab is immersed in hot water, the water temperature is controlled to be 45-55 ℃, the time is 3min, so that floating dust attached to the surface of the frame is removed, and oil stains are softened;
In the third step, the prepared degreasing cleaning solution is put into the tank body, the concentration of the tank liquid adopts 70g/L degreasing agent, the total alkalinity is 30 points, the free alkalinity is 15 points, the frame and the cab are soaked in the tank body for 6 minutes, the saponification reaction of the degreasing cleaning solution on the grease is utilized to remove the saponifiable grease, and the oil stains on the outer surfaces of the frame and the cab are removed;
In the fourth step, the concentration of the bath solution of the bath body is the same as the pre-degreasing concentration, the bath body is heated to keep the temperature of the bath body at 65 ℃, the soaking time is 6 minutes, a circulating pump is adopted for circulating stirring, and the circulating times are 3 times/h to increase the degreasing effect;
In the fifth step, after degreasing, the outer surfaces of the frame and the cab are cleaned by tap water, and oil stains and degreasing liquid which lose adhesiveness after the outer surfaces of the frame and the cab are saponified are cleaned;
in the sixth step, tap water is adopted again to clean the outer surfaces of the frame and the cab, so that the surfaces of the frame and the cab are smooth;
Placing the frame and the cab in a tank body, adding 6g/L of a titanium rubber surface conditioner, controlling the pH value to be 9.0, carrying out stirring for 6min at room temperature, circulating the circulating pump for 1.5 times/h, adjusting the surface property of the plate, improving the surface state, refining the phosphating crystals and improving the phosphating quality;
in the step eight, the frame and the cab are placed in the groove body, 30g/L phosphating agent and 7g/L accelerant are added, the gas value of the accelerant is 8 points, the working temperature is 40 ℃, the time is 8min, and a phosphate protective layer is formed on the surfaces of the frame and the cab.
The volume of cell body is 121m, and width a of cell body is 13000mm, and width B of cell body is 3800mm, and the length c of cell body is 13000mm, and the length d of cell body is 6500mm, and the degree of depth e of cell body is 1850mm, and the degree of depth f of cell body is 3900mm, distinguishes the bottom fixedly connected with nozzle at cell body A, and the nozzle is distinguished towards cell body B, and the setting of slope is downwards inclined to cell body A face, and the inclination of cell body A face is 2.
The coating process of the collinear electrophoresis of the vehicle frame and the cab adopts the treatment processes of hot water washing of the vehicle frame, hot water washing of the cab, pre-degreasing, first water washing, second water washing, surface conditioning and phosphorization, and in the first process of hot water washing, the vehicle frame and the cab are separately cleaned, heavy oil stains and particles on the surface of the vehicle frame are pre-cleaned, and the subsequent process is produced in a joint line, so that the problem that the vehicle frame cross pollutes the cab is solved.
Tank body energy consumption comparative analysis:
firstly, selecting a groove body with heating for energy consumption analysis:
The traditional structure is as follows:
parameters of the water pump: flow =191m3 x 2 times/h =382m3/h, head 28m, power 37 kw;
Heating energy consumption =191m3 × 1000kg/m3 × 10 ° C × 1Kcal/kg =1910000Kcal at the time of starting operation every day.
T1 (annual electricity charge) =37kw × 1 yuan/kw × 250 days/year × 16h =148000 yuan/year.
T2 (annual heating cost) =1910000Kcal/8400Kcal/m3 3.5 yuan/m 3 250 days/year =198958 yuan/year
In the new structure mode:
Parameters of the water pump: flow =121m3 x 2 times/h =242m3/h, head 28m, power 22.5 kw;
Heating energy consumption =121m3 × 1000kg/m3 × 10 ° C × 1Kcal/kg =1210000Kcal at the time of starting operation every day.
T3 (annual electricity cost) =22.5kw × 1 yuan/kw × 250 days/year × 16h =90000 yuan/year.
T4 (annual heating cost) =1210000Kcal/8400Kcal/m3 3.5 yuan/m 3 250 days/year =126041 yuan/year
Then, carrying out energy consumption analysis on the production line:
the whole production line needs 4 heating grooves and 10 heating grooves.
the traditional structure is as follows:
the annual cost of the operation of the tank body Q1= T1 + T2 + 10=2867832 yuan;
the new structure is as follows:
The annual cost of the operation of the tank body Q2= T3 + T4 + 10=1764164 yuan;
annual operating cost savings = Q1-Q2=1103668 yuan/year.
The analysis is only directed at the energy consumption analysis on the tank body, if the production mode of the split-line electrophoresis of the front cab and the frame is used, the difference of the energy consumption annual operating cost of two lines and the energy consumption annual operating cost of a common line can be more than 900 ten thousand, and meanwhile, the investment cost can be saved by about 60%.
through the improvement of the shape of the groove body and the limitation of the size, the utilization rate of the space of the groove body is improved, and compared with the traditional groove body structure, the groove body structure reduces the energy consumption and reduces the production cost.
the rectification power supply of the tank body adopts an IGBT distributed power supply, compared with a traditional SCR tube, the voltage of each anode tube is controllable, the voltage of the anode tube can be adjusted to a high-voltage state at a locally wider position in the middle of the tank body, the voltage of the anode tube at two ends of the tank body at a position close to the vehicle frame can be adjusted to a lower state, and the voltage of each anode tube can be finely adjusted along with the electrophoresis time, so that the thickness uniformity of a paint film of the vehicle frame can be controlled.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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 (6)
1. The coating process for collinear electrophoresis of the frame and the cab is characterized by comprising the following steps of:
step one, washing the frame with hot water; step two, washing the cab with hot water; step three, pre-degreasing; step four, degreasing; step five, washing for the first time; step six, washing with water for the second time; seventhly, surface adjustment; step eight, phosphorization; wherein:
In the first step, the frame is immersed in hot water, the water temperature is controlled at 45-55 ℃, and the time is 1-3min, so as to remove floating dust attached to the surface of the frame and stamp oil dirt;
in the second step, the cab is immersed in hot water, the water temperature is controlled at 45-55 ℃, and the time is 1-3min, so that floating dust and stamping oil dirt attached to the surface of the frame are removed;
in the third step, the prepared degreasing cleaning solution is put into the tank body, the concentration of the tank liquid adopts 50-70g/L degreasing agent, the total alkalinity is 20-30 points, the free alkalinity is 7-15 points, the vehicle frame and the cab are soaked in the tank body for 3-6 minutes, the saponification reaction of the degreasing cleaning solution on the grease is utilized to remove the saponifiable grease, and the oil stains on the outer surfaces of the vehicle frame and the cab are removed;
In the fourth step, the concentration of the bath solution of the bath body is the same as the pre-degreasing concentration, the bath body is heated to keep the temperature of the bath body at 55-65 ℃, the soaking time is 3-6 minutes, and a circulating pump is adopted for circularly stirring to increase the degreasing effect;
in the fifth step, after degreasing, the outer surfaces of the frame and the cab are cleaned by tap water, and oil stains and degreasing liquid which lose adhesiveness after the outer surfaces of the frame and the cab are saponified are cleaned;
In the sixth step, tap water is adopted again to clean the outer surfaces of the frame and the cab, so that the surfaces of the frame and the cab are smooth;
placing the frame and the cab in a tank body, adding 3-6g/L of a titanium rubber surface conditioner, controlling the pH to be 8.0-9.0, carrying out circulation stirring by compressed oil-free air for 4-6min at room temperature, adjusting the surface property of the plate, improving the surface state, ensuring fine crystallization of phosphating, and improving the phosphating quality;
in the step eight, the frame and the cab are placed in the groove body, 23-30g/L of phosphating agent and 2-7g/L of accelerator are added, the gas value of the accelerator is 6-8 points, the working temperature is 35-40 ℃, the time is 3.5-6min, and a phosphate protective layer is generated on the surfaces of the frame and the cab.
2. The coating process of collinear electrophoresis of a vehicle frame and a cab according to claim 1, wherein the coating process comprises the following steps: the volume of the groove body is 121m, the width a of the groove body is 13000mm, and the width b of the groove body is 3800 mm.
3. the coating process of collinear electrophoresis of a vehicle frame and a cab according to claim 1, wherein the coating process comprises the following steps: the length c of the groove body is 13000mm, and the length d of the groove body is 6500 mm.
4. The coating process of collinear electrophoresis of a vehicle frame and a cab according to claim 1, wherein the coating process comprises the following steps: the depth e of the groove body is 1850mm, and the depth f of the groove body is 3900 mm.
5. the coating process of collinear electrophoresis of a vehicle frame and a cab according to claim 1, wherein the coating process comprises the following steps: the bottom of the tank body area A is fixedly connected with a nozzle, and the nozzle faces to the tank body area B.
6. the coating process of collinear electrophoresis of a vehicle frame and a cab according to claim 1, wherein the coating process comprises the following steps: the groove body A face is arranged in a downward inclined mode, and the inclination angle of the groove body A face is 2 degrees.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910939968.3A CN110552046A (en) | 2019-09-30 | 2019-09-30 | Coating process for collinear electrophoresis of frame and cab |
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| CN201910939968.3A CN110552046A (en) | 2019-09-30 | 2019-09-30 | Coating process for collinear electrophoresis of frame and cab |
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| CN110552046A true CN110552046A (en) | 2019-12-10 |
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| CN201910939968.3A Pending CN110552046A (en) | 2019-09-30 | 2019-09-30 | Coating process for collinear electrophoresis of frame and cab |
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| CN111945209A (en) * | 2020-08-10 | 2020-11-17 | 扬州市景杨表面工程有限公司 | Cathode black electrophoresis method for automobile parts |
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Application publication date: 20191210 |