CN104032345A - Anodic oxidation device of piping aluminum alloy profile and oxidization process thereof - Google Patents
Anodic oxidation device of piping aluminum alloy profile and oxidization process thereof Download PDFInfo
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- CN104032345A CN104032345A CN201410244242.5A CN201410244242A CN104032345A CN 104032345 A CN104032345 A CN 104032345A CN 201410244242 A CN201410244242 A CN 201410244242A CN 104032345 A CN104032345 A CN 104032345A
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Abstract
The invention relates to the processing technical field of a piping aluminum alloy profile, in particular to an anodic oxidation device of the piping aluminum alloy profile and an oxidization process thereof. The device comprises an electrolysis tank body, a cathode conducting device and anode conducting devices, wherein notches are evenly formed in the end surface of the tank edge of the electrolysis tank body; the cathode conducting device is clamped with the electrolysis tank body through the notches; electric heating wires communicated with each other are arranged in the side surface of the electrolysis tank body; the cathode conducting device is a Z-shaped structure; an insulation layer is wrapped on the outer wall of the front end of the cathode conducting device; and the anode conducting devices are pairwise arranged, and are respectively fixed on the two opposite inner walls of the electrolysis tank body. The oxidization process comprises the steps of self-inspection and putting on shelves, oil removal and water washing, alkali corrosion and water washing, neutralized light emitting and water washing, anode oxidation and water washing, hole sealing and water washing and drying, and removal from the shelves and inspection and packaging. The technical scheme is suitable for the anodic oxidation device of the piping aluminum alloy profile and the oxidization process thereof, can effectively improve the consistency of surface quality of the piping aluminum alloy profile, effectively reduces the waste of raw materials, and is suitable for large-scale promotion and application.
Description
Technical field
The present invention relates to piping aluminium alloy extrusions processing technique field, particularly a kind of anodic oxidation device of piping aluminium alloy extrusions and oxidizing process.
Background technology
Modern society's decoration mainly adopts aluminium alloy section structure material with door and window or curtain wall, this section bar be mainly that the single and long-term exposure of outward appearance is held corrosion-prone shortcoming in air, the existence of this shortcoming makes it more and more be difficult to meet Contemporary young user for the individual demand of decorating with structured material.For optimize aluminium alloy extrusions decorative effect, strengthen its erosion resistance and increase the service life, aluminium alloy extrusions generally all will carry out surface treatment.The surface treatment of aluminium alloy extrusions is the perfect crowded body of aluminium alloy extrusions and turns round in the magnificent of modern society, the method of conventional aluminium alloy section surface processing is anonizing, can form dense oxidation film at aluminium alloy section surface by anonizing, the existence of this oxide film can significantly improve erosion resistance, wear resistance and the decorate properties of aluminium alloy extrusions.
The anode oxidative treatment method that is applied to aluminium alloy extrusions in prior art refers to: in certain electrolytic solution, taking aluminium alloy extrusions part as anode, taking stainless steel or aluminum metal as negative electrode, in strongly-acid electrolytic solution, aluminium alloy extrusions is carried out to surface-treated process.But in prior art, each manufacturer is not identical arranging of negative electrode electric installation and anode conducting device, setting for the oxidation unit of different types of aluminium alloy extrusions is not identical yet, thereby surface quality uneven that causes the aluminium alloy extrusions occurring on market, is more and more difficult to meet human consumer's consumers demand.Therefore, studying a kind of anodic oxidation device that is applicable to piping aluminium alloy extrusions is the current problem that will study.
Summary of the invention
Technical problem to be solved by this invention is: overcome deficiency of the prior art, a kind of anodic oxidation device and oxidizing process that is applicable to piping aluminium alloy extrusions is provided, this device conductivity is good, and the surface quality of aluminium alloy extrusions can significantly be unified and improve to oxidizing process on its basis.
The technical solution adopted for the present invention to solve the technical problems is: a kind of anodic oxidation device of piping aluminium alloy extrusions, this anodic oxidation device comprises cell body, negative electrode electric installation and anode conducting device, the trough rim end face of described cell body has equally distributed recess, negative electrode electric installation is by recess and cell body clamping, inside, cell body side has the electrical heating wire being interconnected, can heat up to cell body, facilitate the intensification of electrolytic solution and the oven dry of piping aluminium alloy extrusions, cell body bottom has leakage fluid dram, leakage fluid dram end has rotary rubber piston, described negative electrode electric installation is Z-type structure, and the angle of the adjacent edge composition of Z-type structure is 90 °, and the outer wall of Z-type structure front end is enclosed with insulation layer, described anode conducting device is fixedly installed on two opposed inner walls of cell body in pairs and respectively, and anode conducting device is that the two-part that is bolted can bending structure, and the front end of anode conducting device is the cone-shaped body that diameter reduces gradually.
Further, the making material of described Z-type structure is plumbous, and in Z-type structure, the front end of horizontal edge is connected with power cathode by wire.
Further, residual in cell body for preventing electrolytic solution, the inwall turning of described cell body is fillet structure.
Further, for effectively improving the working efficiency of cell body, the logarithm of described anode conducting device is at least one pair of.
Further, the in pairs described and end that is fixedly installed on respectively the anode conducting device in two opposed inner walls of cell body is connected cell body is outside by wire.
Further, for preventing that excessive heating problem from appearring in electric installation in the course of the work, the vertical range of the trough rim of described Z-type structure vertical edge and the clamping of Z-type structure is 1.5-3 times of Z-type structure vertical edge thickness; Under Z-type structure, between horizontal edge and the bottom of cell body inwall, there is space.
An oxidizing process for piping aluminium alloy extrusions, adopts above-mentioned anodic oxidation device, and this oxidizing process has following steps:
A. self-inspection is added
Aluminium alloy extrusions is carried out to surface examination, record same batch of each section bar surface flatness, defect, burr and aberration level, after record, the two ends of aluminium alloy extrusions are respectively installed on the anode conducting device of oxidation unit;
Further, for ensureing production safety, the every groove dress of 1 Wan An training oxidation trough vermicelli amass as 60-70m
2for the best, Special Circumstances must not exceed 60m
2, the every groove dress of 1.2 Wan An training oxidation trough vermicelli amass as 70-90m
2, oxidation unit, in the time of second stage employ, is installed the anode conducting device at aluminium alloy extrusions two ends and need to be removed oxide film.
B. oil removing washing
Degreaser is injected to cell body, at normal temperatures aluminium alloy section surface is carried out to oil removing, the composition of described degreaser is the sulphuric acid soln of 150-200g/L, process after 2-8min with clear water wash to the pH of Surface of profile be 4-7, degreaser and washes are discharged;
Further, the greasy dirt of in particular cases looking Surface of profile is determined the treatment time.
C. alkaline etching washing
Alkaline etching agent is injected to cell body, at normal temperatures aluminium alloy section surface is carried out to alkaline etching, described alkaline etching agent is that concentration is the sodium hydroxide solution of 40-65g/L, process after 2-8min with clear water wash to the pH of Surface of profile be 6-8, alkaline etching agent and washes are discharged;
D. in, wash with bright dipping
Neutralization reagent is injected to cell body, in at normal temperatures aluminium alloy section surface being carried out and technique, described neutralization reagent is that concentration is the sulfuric acid of 180-200g/L or the nitric acid that concentration is 140-180g/L, process after 2-4min with clear water wash to the pH of Surface of profile be 3-5, neutralization reagent and washes are discharged;
Bright dipping reagent is injected to cell body, at normal temperatures aluminium alloy section surface is carried out to bright dipping technique, described bright dipping reagent is that concentration is the nitric acid of 200-280g/L, process after 2-4min with clear water wash to the pH of Surface of profile be 5-7, bright dipping reagent and washes are discharged;
E. anodic oxidation washing
This step is to a kind of water white film of the Surface Creation of goods, prevents the surface corrosion of material, and the thickness of rete is to adjust according to client's demand, and thickness forms the impact that is conventionally subject to current density, voltage, tank liquor concentration and temperature;
Inject the electrolyte in cell body, in the time that temperature is 20 ± 2 DEG C, aluminium alloy section surface is carried out to oxidizing process, described electrolytic solution be 130-160g/L sulphuric acid soln and≤aluminum ion of 20g/L composition, after processing with clear water wash to the pH of Surface of profile be 5-7, electrolytic solution and washes are discharged, treatment time determines according to the thickness of required oxide film, current density and formula L=I T K, wherein, L in formula is oxide film micron thickness, K is constant 0.28-0.3, and I is current density A/m
2, T is oxidation the number of minutes;
After the long-pending calculating accurately of dress vermicelli, just can try to achieve the required oxidization time of any thickness of oxidation film from above-mentioned formula; Aluminium section bar should be avoided being immersed in for a long time in tank before anodic oxidation, and maximum duration is no more than 3min, in order to avoid the acid etch Surface of profile in tank; Through anodised product, the time stopping in groove is no more than 5min, prevents from affecting the quality of oxide film; Require the high bright product of brightness, current density is selected 1-1.2A/dm
2be advisable.
F. sealing of hole washing and drying
Pore-sealing liquid is injected to cell body, in the time that temperature is 25 ± 2 DEG C, aluminium alloy section surface is carried out to hole-sealing technology, the nickel ion that described pore-sealing liquid is 0.8-1.5g/L by concentration and the fluorion of 0.3-0.65g/L form, and the pH value of pore-sealing liquid is 5.5-6.5, and the hole-sealing technology treatment time determines according to the thickness of oxide film, 1 point of general each film sealing of hole, after being disposed with clear water wash to the pH of Surface of profile be 5-7.5, pore-sealing liquid and washes are discharged, treat that aluminium alloy section surface is dry;
G. undercarriage test package
Aluminium alloy extrusions is taken off to packaging warehouse-in after record of survey from anode conducting device.
Undercarriage should be handled with care, note the distortion of anti-damage, anti-collision, apart from undercarriage 3m, what do not allow section bar touches wound sound, what length was greater than 4m processes directly can being placed on the solarization bin on place of packaging without finishing mandrel, and the product of not drying (drip-dry) is placed on the solarization bin on place; Product needed is done lower step processing, requires first to process product being placed on " chassis " of packing afterwards.
Beneficial effect: in technical scheme of the present invention, negative electrode electric installation, by the setting of recess and cell body clamping and insulation layer, can effectively improve the overall security of this device; Anode conducting device is fixedly installed on two opposed inner walls of cell body in pairs and respectively, anode conducting device is the setting that the two-part that is bolted can bending structure, can facilitate the installation and removal of tubular type aluminium alloy extrusions, be conducive to aluminium alloy extrusions and be oxidized in the electrolytic solution of homogeneous; The front end of anode conducting device is the setting of the cone-shaped body that reduces gradually of diameter, can reduce the contact area of anode conducting device and aluminium alloy extrusions to be oxidized, thereby reduce later stage scrap rate.Adopt the anodic oxidation device that is applicable to piping aluminium alloy extrusions and the oxidizing process of technical scheme gained of the present invention, can effectively improve the consistence of piping Surface Quality of Aluminum Alloy Profiles, effectively reduce waste of raw materials, be applicable to large-scale promotion application.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described;
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A sectional view in Fig. 1;
Fig. 3 is the B-B sectional view of Fig. 1;
1. cell body in figure, 11. electrical heating wires, 12. leakage fluid drams, 13. feets, 2. negative electrode electric installation, 21. insulation layers, 3. anode conducting device.
Embodiment
The present invention is further illustrated by reference to the accompanying drawings now.The schematic diagram that these accompanying drawings are simplification only illustrates basic structure of the present invention in a schematic way, and therefore it only shows the formation relevant with the present invention.
As Fig. 1, 2, the anodic oxidation device of a kind of piping aluminium alloy extrusions shown in 3, this anodic oxidation device comprises cell body 1, negative electrode electric installation 2 and anode conducting device 3, the trough rim end face of cell body 1 has equally distributed recess, negative electrode electric installation 2 is by recess and cell body 1 clamping, cell body 1 inside, side has the electrical heating wire 11 being interconnected, can heat up to cell body, facilitate the intensification of electrolytic solution and the oven dry of piping aluminium alloy extrusions, cell body 1 bottom has the leakage fluid dram 12 of oblique lower setting, leakage fluid dram 12 ends have rotary rubber piston, the leakage fluid dram 12 of oblique lower setting can make this device at the feet 13 of leakage fluid dram 12 lower ends in the time tilting a little, just electrolytic solution can be discharged smoothly,
Negative electrode electric installation 2 is Z-type structure, and the angle of the adjacent edge composition of Z-type structure is 90 °, and the outer wall of Z-type structure front end is enclosed with insulation layer 21; Anode conducting device 3 is fixedly installed on two opposed inner walls of cell body 1 in pairs and respectively, and anode conducting device 3 can bending structure for the two-part that is bolted, and the front end of anode conducting device 3 is the cone-shaped body that diameter reduces gradually.
In Z-type structure, the front end of horizontal edge is connected with power cathode by wire; The inwall turning of cell body 1 is fillet structure; The logarithm of anode conducting device 3 is three pairs; The end that is fixedly installed in pairs and respectively the anode conducting device 3 in two opposed inner walls of cell body 1 is connected cell body is outside by wire; The vertical range of the trough rim of Z-type structure vertical edge and the clamping of Z-type structure is 1.5 times of Z-type structure vertical edge thickness; Under Z-type structure, between horizontal edge and the bottom of cell body 1 inwall, there is space.
An oxidizing process for piping aluminium alloy extrusions, adopts above-mentioned anodic oxidation device, and this oxidizing process has following steps:
A. self-inspection is added
Aluminium alloy extrusions is carried out to surface examination, record same batch of each section bar surface flatness, defect, burr and aberration level, after record, the two ends of aluminium alloy extrusions are respectively installed on the anode conducting device (3) of oxidation unit;
B. oil removing washing
Degreaser is injected to cell body (1), at normal temperatures aluminium alloy section surface is carried out to oil removing, the composition of described degreaser is the sulphuric acid soln of 200g/L, process after 8min with clear water wash to the pH of Surface of profile be 4-7, degreaser and washes are discharged;
C. alkaline etching washing
Alkaline etching agent is injected to cell body (1), at normal temperatures aluminium alloy section surface is carried out to alkaline etching, described alkaline etching agent is that concentration is the sodium hydroxide solution of 65g/L, process after 8min with clear water wash to the pH of Surface of profile be 6-8, alkaline etching agent and washes are discharged;
D. in, wash with bright dipping
Neutralization reagent is injected to cell body (1), in at normal temperatures aluminium alloy section surface being carried out and technique, described neutralization reagent is that concentration is that concentration is the nitric acid of 180g/L, process after 4min with clear water wash to the pH of Surface of profile be 3-5, neutralization reagent and washes are discharged;
Bright dipping reagent is injected to cell body (1), at normal temperatures aluminium alloy section surface is carried out to bright dipping technique, described bright dipping reagent is that concentration is the nitric acid of 280g/L, process after 4min with clear water wash to the pH of Surface of profile be 5-7, bright dipping reagent and washes are discharged;
E. anodic oxidation washing
Inject the electrolyte in cell body (1), in the time that temperature is 20 ± 2 DEG C, aluminium alloy section surface is carried out to oxidizing process, described electrolytic solution be 160g/L sulphuric acid soln and≤aluminum ion of 20g/L composition, after processing with clear water wash to the pH of Surface of profile be 5-7, electrolytic solution and washes are discharged, treatment time determines according to the thickness of required oxide film, current density and formula L=I T K, wherein, L in formula is oxide film micron thickness, K is constant 0.28-0.3, and I is current density A/m
2, T is oxidation the number of minutes;
F. sealing of hole washing and drying
Pore-sealing liquid is injected to cell body (1), in the time that temperature is 25 ± 2 DEG C, aluminium alloy section surface is carried out to hole-sealing technology, the nickel ion that described pore-sealing liquid is 1.5g/L by concentration and the fluorion of 0.65g/L form, the pH value of pore-sealing liquid is 5.5-6.5, the hole-sealing technology treatment time determines according to the thickness of oxide film, 1 point of general each film sealing of hole, after being disposed with clear water wash to the pH of Surface of profile be 5-7.5, pore-sealing liquid and washes are discharged, treat that aluminium alloy section surface is dry;
G. undercarriage test package
Aluminium alloy extrusions is taken off to packaging warehouse-in after record of survey from anode conducting device (3).
Above-mentioned embodiment is only explanation technical conceive of the present invention and feature; its object is to allow person skilled in the art can understand content of the present invention and be implemented; can not limit the scope of the invention with this; all equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (8)
1. the anodic oxidation device of a piping aluminium alloy extrusions, it is characterized in that: this anodic oxidation device comprises cell body (1), negative electrode electric installation (2) and anode conducting device (3), the trough rim end face of described cell body (1) has equally distributed recess, negative electrode electric installation (2) is by recess and cell body (1) clamping, cell body (1) inside, side has the electrical heating wire (11) being interconnected, and cell body (1) bottom has leakage fluid dram (12);
Described negative electrode electric installation (2) is Z-type structure, and the angle of the adjacent edge composition of Z-type structure is 90 °, and the outer wall of Z-type structure front end is enclosed with insulation layer (21); Described anode conducting device (3) is fixedly installed on two opposed inner walls of cell body (1) in pairs and respectively, anode conducting device (3) can bending structure for the two-part that is bolted, and the front end of anode conducting device (3) is the cone-shaped body that diameter reduces gradually.
2. the anodic oxidation device of piping aluminium alloy extrusions according to claim 1, is characterized in that: in described Z-type structure, the front end of horizontal edge is connected with power cathode by wire.
3. the anodic oxidation device of piping aluminium alloy extrusions according to claim 1, is characterized in that: the inwall turning of described cell body (1) is fillet structure.
4. the anodic oxidation device of piping aluminium alloy extrusions according to claim 1, is characterized in that: the logarithm of described anode conducting device (3) is at least one pair of.
5. the anodic oxidation device of piping aluminium alloy extrusions according to claim 1, is characterized in that: the in pairs described and end that is fixedly installed on respectively the anode conducting device (3) in two opposed inner walls of cell body (1) is connected cell body is outside by wire.
6. the anodic oxidation device of piping aluminium alloy extrusions according to claim 1, is characterized in that: the vertical range of the trough rim of described Z-type structure vertical edge and the clamping of Z-type structure is 1.5-3 times of Z-type structure vertical edge thickness.
7. the anodic oxidation device of piping aluminium alloy extrusions according to claim 1, is characterized in that: under described Z-type structure, between horizontal edge and the bottom of cell body (1) inwall, have space.
8. an oxidizing process for piping aluminium alloy extrusions, is characterized in that: the anodic oxidation device described in employing claim 1-8 any one, and this oxidizing process has following steps:
A. self-inspection is added
Aluminium alloy extrusions is carried out to surface examination, record same batch of each section bar surface flatness, defect, burr and aberration level, after record, the two ends of aluminium alloy extrusions are respectively installed on the anode conducting device (3) of oxidation unit;
B. oil removing washing
Degreaser is injected to cell body (1), at normal temperatures aluminium alloy section surface is carried out to oil removing, the composition of described degreaser is the sulphuric acid soln of 150-200g/L, process after 2-8min with clear water wash to the pH of Surface of profile be 4-7, degreaser and washes are discharged;
C. alkaline etching washing
Alkaline etching agent is injected to cell body (1), at normal temperatures aluminium alloy section surface is carried out to alkaline etching, described alkaline etching agent is that concentration is the sodium hydroxide solution of 40-65g/L, process after 2-8min with clear water wash to the pH of Surface of profile be 6-8, alkaline etching agent and washes are discharged;
D. in, wash with bright dipping
Neutralization reagent is injected to cell body (1), in at normal temperatures aluminium alloy section surface being carried out and technique, described neutralization reagent is that concentration is the sulfuric acid of 180-200g/L or the nitric acid that concentration is 140-180g/L, process after 2-4min with clear water wash to the pH of Surface of profile be 3-5, neutralization reagent and washes are discharged;
Bright dipping reagent is injected to cell body (1), at normal temperatures aluminium alloy section surface is carried out to bright dipping technique, described bright dipping reagent is that concentration is the nitric acid of 200-280g/L, process after 2-4min with clear water wash to the pH of Surface of profile be 5-7, bright dipping reagent and washes are discharged;
E. anodic oxidation washing
Inject the electrolyte in cell body (1), in the time that temperature is 20 ± 2 DEG C, aluminium alloy section surface is carried out to oxidizing process, described electrolytic solution be 130-160g/L sulphuric acid soln and≤aluminum ion of 20g/L composition, after processing with clear water wash to the pH of Surface of profile be 5-7, electrolytic solution and washes are discharged, treatment time determines according to the thickness of required oxide film, current density and formula L=I T K, wherein, L in formula is oxide film micron thickness, K is constant 0.28-0.3, and I is current density A/m
2, T is oxidation the number of minutes;
F. sealing of hole washing and drying
Pore-sealing liquid is injected to cell body (1), in the time that temperature is 25 ± 2 DEG C, aluminium alloy section surface is carried out to hole-sealing technology, the nickel ion that described pore-sealing liquid is 0.8-1.5g/L by concentration and the fluorion of 0.3-0.65g/L form, the pH value of pore-sealing liquid is 5.5-6.5, the hole-sealing technology treatment time determines according to the thickness of oxide film, 1 point of general each film sealing of hole, after being disposed with clear water wash to the pH of Surface of profile be 5-7.5, pore-sealing liquid and washes are discharged, treat that aluminium alloy section surface is dry;
G. undercarriage test package
Aluminium alloy extrusions is taken off to packaging warehouse-in after record of survey from anode conducting device (3).
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CN104674319A (en) * | 2014-11-25 | 2015-06-03 | 江门市蓬江区善长五金制品有限公司 | Surface treating method for aluminum product |
CN105839162A (en) * | 2016-03-28 | 2016-08-10 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Aluminum alloy oxidation line sealing groove and the oxidation tank medicament compatible water saving system |
CN110318084A (en) * | 2019-08-14 | 2019-10-11 | 深圳市晋铭航空技术有限公司 | For reducing the implementation method of black line material line after the oxidation of aircraft aluminum part anode |
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CN203866394U (en) * | 2014-06-04 | 2014-10-08 | 张家港市金邦铝业有限公司 | Anodic oxidation device for aluminum alloy section bars of pipe systems |
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CN104674319A (en) * | 2014-11-25 | 2015-06-03 | 江门市蓬江区善长五金制品有限公司 | Surface treating method for aluminum product |
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CN110318084A (en) * | 2019-08-14 | 2019-10-11 | 深圳市晋铭航空技术有限公司 | For reducing the implementation method of black line material line after the oxidation of aircraft aluminum part anode |
CN110318084B (en) * | 2019-08-14 | 2021-05-14 | 深圳市晋铭航空技术有限公司 | Implementation method for reducing black line material lines after anodic oxidation of aviation aluminum parts |
CN115161660A (en) * | 2022-03-27 | 2022-10-11 | 华东理工大学 | Alkaline electrolytic tank system with pulse type circulating liquid inlet and working method thereof |
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CN115573012A (en) * | 2022-10-08 | 2023-01-06 | 美图(福建)铝业有限公司 | Anodic oxidation treatment process for aluminum material surface |
CN115573012B (en) * | 2022-10-08 | 2024-05-10 | 美图(福建)铝业有限公司 | Anodic oxidation treatment process for aluminum surface |
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