CN102206845A - Method for oxidizing brake master cylinder - Google Patents
Method for oxidizing brake master cylinder Download PDFInfo
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- CN102206845A CN102206845A CN2011101417297A CN201110141729A CN102206845A CN 102206845 A CN102206845 A CN 102206845A CN 2011101417297 A CN2011101417297 A CN 2011101417297A CN 201110141729 A CN201110141729 A CN 201110141729A CN 102206845 A CN102206845 A CN 102206845A
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Abstract
The invention discloses a method for oxidizing a brake master cylinder, which comprises the following steps of: 1, hanging, namely hanging the brake master cylinder to a rack special for oxidizing the brake master cylinder; 2, performing weak acid oil removal treatment; 3, preparing anode oxidizing tank liquor; 4, performing anode oxidization treatment; and 5, taking out the brake master cylinder, cleaning, and performing enclosed drying treatment. The brake master cylinder treated by the method meets the industrial requirements on quality such as film thickness, roughness, hardness and the like.
Description
Technical field
The present invention relates to the treatment process of master cylinder, particularly relate to a kind of method for oxidation of master cylinder.
Background technology
Along with rapid development of automobile industry, people are to having higher requirement in the reliability and the work-ing life of brake system of car.Master cylinder is not only had the thickness requirement, and also roughness and the hardness to master cylinder all has strict requirement, and specific requirement: thickness is 3-10um in the hole, roughness Ra≤0.5, HV 〉=350, because the AlSi7Mg si content is higher in the cast aluminium, the cylinder hole is dark (about 100mm).The requirement that will satisfy simultaneously thickness, roughness and hardness is the comparison difficulty, available technology adopting hardening oxidation technology, because hardening oxidation needs lower temperature usually, to having relatively high expectations of equipment, the simultaneous oxidation cost also increases greatly.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of method for oxidation of master cylinder is provided, thickness, roughness and the hardness of master cylinder oxide film can be met design requirement simultaneously, and save cost.
Technical solution of the present invention is as follows:
A kind of method for oxidation of master cylinder is characterized in that this method comprises the steps:
1. go up and hang: two pilot holes on the described master cylinder are hung in the hanger that is used for this master cylinder of oxidation;
2. prepare degreaser and oil removal treatment: after amino acid 26-32%, Sodium phosphate dibasic 10-15%, Sodium Benzoate 8-12%, glycerine 12-16%, citric acid 6-8 %, Sodium dodecylbenzene sulfonate 1-2% and water 18-25% mix, with the volume ratio is the dilution of 4-10% and water, master cylinder behind the last extension is placed in this diluent, adjusting pH is 1.5-2.5, treatment temp is 50 ± 1 degree, and the treatment time is 4-6 minute;
3. prepare anode oxidation groove liquid: this anode oxidation groove liquid is the sulfuric acid oxidation tank liquor, and wherein, sulfuric acid concentration is 150-170g/l, aluminum ion≤15g/l, chlorine ion concentration≤0.2g/l;
4. anodic oxidation treatment: this anodic oxidation treatment adopts direct supply, the master cylinder that 2. step is handled is an anode, with stereotype symmetrical in the anodizing tank is negative electrode, the constant voltage oxidation is set, oxidation voltage is 20 ± 1V, be 5～8 minutes pressure rising time, and oxidization time is 16～18 minutes, and oxidizing temperature is 16～19 ℃;
5. take out described master cylinder after oxidation is finished, and clean, seal oven dry and handle.
Described hanger is included in the two ends of laths of metal of the hyphen of at least two levels and fixes two vertical and parallel long metal sheet bars, the top of these two long metal sheet bars curves hook, on the horizontal lamellae below described, and be provided with at least one suspension system with described hook homonymy.
Described suspension system comprises the titanium metal plate of the lath-shaped of a bending, the both sides of this titanium metal plate below are respectively equipped with the titanium mesh of bending, distance between two pilot holes on distance between this two titanium mesh and the described master cylinder equates, be provided with the titanium metal rod in the described two titanium meshes outside, this titanium metal rod becomes 25～35 degree angles with described long metal sheet bar, the length of described titanium metal rod is 40～50mm, and diameter is than the little 1～1.5mm of pilot hole diameter on the described master cylinder.
The thickness of described titanium mesh is 2～3mm.
The thickness of described titanium metal plate is 0.5～1mm.
Described titanium metal plate becomes the secondary bending, and bending angle is 100～120 degree.
Compared with prior art, technique effect of the present invention is:
1. adopt the hanger of special-purpose this master cylinder of oxidation, because master cylinder and vertical direction have the angle of 25-35 degree, can make oxidation liquid flow out the cylinder hole smoothly, simultaneously can make power line reach cylinder hole deep inside, generate oxide film smoothly, utilized lever principle, with the outward flange of master cylinder pilot hole as supporting-point, the hole preglabellar field is as resistance arm, the titanium metal plate that compresses is as power arm, so not only increase the point of contact of workpiece and titanium metal rod, and the worker is easy to workpiece is clamped because power arm specific filtration resistance brachium is a lot.Lifting workpiece is convenient, as long as titanium metal plate is upwards lifted, and lifting workpiece easily just.
2. adopt the slightly acidic oil removing process, both guaranteed deoiling effect, avoid the undue etch of alkaline degreaser again, thereby avoid Eutectic Silicon in Al-Si Cast Alloys outstanding, influence security of products energy and work-ing life the aluminium base surface.
. being controlled at pressure rising time 5-8 minute, avoided general oxidizing process short shortcoming pressure rising time in the oxidizing process, made that the heat of voltage ascent stage is effectively distributed, thereby controlled the dissolving of oxide film that the roughness of oxide film is guaranteed.
. adopting concentration is the sulfuric acid of 150g/l-170g/l, and oxidizing temperature is 16 ℃-19 ℃ and had both guaranteed current efficiency, can improve the hardness of oxide film again, has reduced energy consumption cost.
Description of drawings
Fig. 1 is the hanging tool structure synoptic diagram that is used for the oxidation master cylinder among the present invention.
Fig. 2 is the hanging tool structure synoptic diagram that is used for the oxidation master cylinder among the present invention and is provided with a plurality of suspension systems.
Fig. 3 is that same area is amplified 400 times fractograph in the cylinder hole after the embodiment of the invention 1 oxidation.
Fig. 4 is that same area is amplified 400 times fractograph in the cylinder hole after Comparative Examples 1 oxidation.
Fig. 5 is that same area is amplified 400 times fractograph in the cylinder hole after Comparative Examples 2 oxidations.
Fig. 6 is that same area is amplified 400 times fractograph in the cylinder hole after Comparative Examples 3 oxidations.
Embodiment
The invention will be further described below in conjunction with embodiment and accompanying drawing, but should not limit protection scope of the present invention with this.
A kind of method for oxidation of master cylinder is characterized in that this method comprises the steps:
1. go up and hang: two pilot holes on the described master cylinder are hung in the hanger that is used for this master cylinder of oxidation;
Please earlier referring to Fig. 1, Fig. 1 is the hanging tool structure synoptic diagram that is used for the oxidation master cylinder among the present invention.As seen from the figure, the hanger that is used for this master cylinder of oxidation is that two vertical and parallel long metal sheet bars are fixed at the two ends of laths of metal that are included in the hyphen of at least two levels, the top of these two long metal sheet bars curves hook 1, on the horizontal lamellae 2 below described, and be provided with at least one suspension system with described hook 1 homonymy.At bar of center fixed of described uppermost horizontal lamellae, so that hold.
Suspension system comprises the titanium metal plate 3 of the lath-shaped of a bending, and its thickness is 0.5～1mm, 3 one-tenth secondary bendings of titanium metal plate, and bending angle is 100～120 degree.The both sides of titanium metal plate 3 belows are respectively equipped with the titanium mesh 4 of bending, its thickness is 2～3mm, distance between two pilot holes on distance between this two titanium mesh 4 and the described master cylinder equates, respectively be provided with titanium metal rod 5 in described two titanium meshes 4 outsides, this titanium metal rod 5 becomes 25～35 to spend angles with described long metal sheet bar, the length of described titanium metal rod 5 is 40～50mm, and diameter is than the little 1～1.5mm of pilot hole diameter on the described master cylinder.
This is used for also a plurality of suspension systems can being set according to the particular case of each production line on the hanger of this master cylinder of oxidation, as shown in Figure 2.
2. prepare degreaser and oil removal treatment: after amino acid 26-32%, Sodium phosphate dibasic 10-15%, Sodium Benzoate 8-12%, glycerine 12-16%, citric acid 6-8 %, Sodium dodecylbenzene sulfonate 1-2% and water 18-25% mix, with the volume ratio is the dilution of 4-10% and water, master cylinder behind the last extension is placed in this diluent, adjusting pH is 1.5-2.5, treatment temp is 50 ± 1 degree, and the treatment time is 5 minutes;
3. prepare anode oxidation groove liquid: this anode oxidation groove liquid is the sulfuric acid oxidation tank liquor, and wherein, sulfuric acid concentration is 150-170g/l, aluminum ion≤15g/l, chlorine ion concentration≤0.2g/l;
4. anodic oxidation treatment: this anodic oxidation treatment adopts direct supply, the master cylinder that 2. step is handled is an anode, with stereotype symmetrical in the anodizing tank is negative electrode, the constant voltage oxidation is set, oxidation voltage is 20 ± 1V, be 5～8 minutes pressure rising time, and oxidization time is 16～18 minutes, and oxidizing temperature is 16～19 ℃;
5. take out described master cylinder after oxidation is finished, and clean, seal, oven dry is handled.Owing to be conventionally known to one of skill in the art, do not repeat them here.
Embodiment 1.
A kind of method for oxidation of master cylinder comprises the steps:
1. go up to hang: two pilot holes on the described master cylinder are inserted in two titanium metal rods 5 of hangers, be pressed in the afterbody of master cylinder with rubber-like titanium metal plate 5, the thickness of titanium metal plate 5 is 0.5mm-1mm.Utilize lever principle,,, note up, distribute so that produce gas in the oxidising process with master cylinder afterbody foraminous one side as long as just master cylinder can be compressed with less elastic force because long power arm is arranged.
2. prepare degreaser and oil removal treatment: after amino acid 26%, Sodium phosphate dibasic 15%, Sodium Benzoate 10%, glycerine 16%, citric acid 6 %, Sodium dodecylbenzene sulfonate 2% and water 25% mix, with the volume ratio is the dilution of 4-10% and water, master cylinder behind the last extension is placed in this diluent, adjusting pH is 1.5-2.5, treatment temp is 50 ± 1 degree, and the treatment time is 4-6 minute;
3. prepare anode oxidation groove liquid: this anode oxidation groove liquid is the sulfuric acid oxidation tank liquor, and wherein, sulfuric acid concentration is 150-170g/l, aluminum ion≤15g/l, chlorine ion concentration≤0.2g/l;
4. anodic oxidation treatment: this anodic oxidation treatment adopts direct supply, the master cylinder that 2. step is handled is an anode, with stereotype symmetrical in the anodizing tank is negative electrode, the constant voltage oxidation is set, oxidation voltage is 20 ± 1V, be 5～8 minutes pressure rising time, and oxidization time is 16～18 minutes, and oxidizing temperature is 16～19 ℃;
5. take out described master cylinder after oxidation is finished, and clean, seal oven dry and handle.
A kind of method for oxidation of master cylinder comprises the steps:
1. go up to hang: two pilot holes on the described master cylinder are inserted in two titanium metal rods 5 of hangers, be pressed in the afterbody of master cylinder with rubber-like titanium metal plate 3, the thickness of titanium metal plate 3 is 0.5mm-1mm.Utilize lever principle,,, note up, distribute so that produce gas in the oxidising process with master cylinder afterbody foraminous one side as long as just master cylinder can be compressed with less elastic force because long power arm is arranged.
2. prepare degreaser and oil removal treatment: after amino acid 28%, Sodium phosphate dibasic 15%, Sodium Benzoate 10%, glycerine 16%, citric acid 8 %, Sodium dodecylbenzene sulfonate 1% and water 22% mix, with the volume ratio is the dilution of 4-10% and water, master cylinder behind the last extension is placed in this diluent, adjusting pH is 1.5-2.5, treatment temp is 50 ± 1 degree, and the treatment time is 4-6 minute;
3. prepare anode oxidation groove liquid: this anode oxidation groove liquid is the sulfuric acid oxidation tank liquor, and wherein, sulfuric acid concentration is 150-170g/l, aluminum ion≤15g/l, chlorine ion concentration≤0.2g/l;
4. anodic oxidation treatment: this anodic oxidation treatment adopts direct supply, the master cylinder that 2. step is handled is an anode, with stereotype symmetrical in the anodizing tank is negative electrode, the constant voltage oxidation is set, oxidation voltage is 20 ± 1V, be 7 minutes pressure rising time, and oxidization time is 16 minutes, and oxidizing temperature is 18 ℃;
5. take out described master cylinder after oxidation is finished, and clean, seal oven dry and handle.
A kind of method for oxidation of master cylinder comprises the steps:
1. go up to hang: two pilot holes on the described master cylinder are inserted in two titanium metal rods 5 of hangers, be pressed in the afterbody of master cylinder with rubber-like titanium metal plate 3, the thickness of titanium metal plate 3 is 0.5mm-1mm.Utilize lever principle,,, note up, distribute so that produce gas in the oxidising process with master cylinder afterbody foraminous one side as long as just master cylinder can be compressed with less elastic force because long power arm is arranged.
2. prepare degreaser and oil removal treatment: after amino acid 32%, Sodium phosphate dibasic 10%, Sodium Benzoate 12%, glycerine 12%, citric acid 8 %, Sodium dodecylbenzene sulfonate 1% and water 25% mix, with the volume ratio is the dilution of 4-10% and water, master cylinder behind the last extension is placed in this diluent, adjusting pH is 1.5-2.5, treatment temp is 50 ± 1 degree, and the treatment time is 4-6 minute;
3. prepare anode oxidation groove liquid: this anode oxidation groove liquid is the sulfuric acid oxidation tank liquor, and wherein, sulfuric acid concentration is 150-170g/l, aluminum ion≤15g/l, chlorine ion concentration≤0.2g/l;
4. anodic oxidation treatment: this anodic oxidation treatment adopts direct supply, the master cylinder that 2. step is handled is an anode, with stereotype symmetrical in the anodizing tank is negative electrode, the constant voltage oxidation is set, oxidation voltage is 20 ± 1V, be 6 minutes pressure rising time, and oxidization time is 17 minutes, and oxidizing temperature is 18 ℃;
5. take out described master cylinder after oxidation is finished, and clean, seal oven dry and handle.
A kind of method for oxidation of master cylinder comprises the steps:
1. go up to hang: two pilot holes on the described master cylinder are inserted in two titanium metal rods 5 of hangers, be pressed in the afterbody of master cylinder with rubber-like titanium metal plate 5, the thickness of titanium metal plate 5 is 0.5mm-1mm.Utilize lever principle,,, note up, distribute so that produce gas in the oxidising process with master cylinder afterbody foraminous one side as long as just master cylinder can be compressed with less elastic force because long power arm is arranged.
2. prepare degreaser and oil removal treatment: after amino acid 32%, Sodium phosphate dibasic 15%, Sodium Benzoate 9%, glycerine 16%, citric acid 8%, Sodium dodecylbenzene sulfonate 2% and water 18% mix, with the volume ratio is the dilution of 4-10% and water, master cylinder behind the last extension is placed in this diluent, adjusting pH is 1.5-2.5, treatment temp is 50 ± 1 degree, and the treatment time is 4-6 minute;
3. prepare anode oxidation groove liquid: this anode oxidation groove liquid is the sulfuric acid oxidation tank liquor, and wherein, sulfuric acid concentration is 150-170g/l, aluminum ion≤15g/l, chlorine ion concentration≤0.2g/l;
4. anodic oxidation treatment: this anodic oxidation treatment adopts direct supply, the master cylinder that 2. step is handled is an anode, with stereotype symmetrical in the anodizing tank is negative electrode, the constant voltage oxidation is set, oxidation voltage is 20 ± 1V, be 5 minutes pressure rising time, and oxidization time is 16 minutes, and oxidizing temperature is 19 ℃;
5. take out described master cylinder after oxidation is finished, and clean, seal oven dry and handle.
Embodiment 5
A kind of method for oxidation of master cylinder comprises the steps:
1. go up to hang: two pilot holes on the described master cylinder are inserted in two titanium metal rods 5 of hangers, be pressed in the afterbody of master cylinder with rubber-like titanium metal plate 3, the thickness of titanium metal plate 3 is 0.5mm-1mm.Utilize lever principle,,, note up, distribute so that produce gas in the oxidising process with master cylinder afterbody foraminous one side as long as just master cylinder can be compressed with less elastic force because long power arm is arranged.
2. prepare degreaser and oil removal treatment: after amino acid 32%, Sodium phosphate dibasic 15%, Sodium Benzoate 8%, glycerine 12%, citric acid 7 %, Sodium dodecylbenzene sulfonate 1% and water 25% mix, with the volume ratio is the dilution of 4-10% and water, master cylinder behind the last extension is placed in this diluent, adjusting pH is 1.5-2.5, treatment temp is 50 ± 1 degree, and the treatment time is 4-6 minute;
3. prepare anode oxidation groove liquid: this anode oxidation groove liquid is the sulfuric acid oxidation tank liquor, and wherein, sulfuric acid concentration is 150-170g/l, aluminum ion≤15g/l, chlorine ion concentration≤0.2g/l;
4. anodic oxidation treatment: this anodic oxidation treatment adopts direct supply, the master cylinder that 2. step is handled is an anode, with stereotype symmetrical in the anodizing tank is negative electrode, the constant voltage oxidation is set, oxidation voltage is 20 ± 1V, be 8 minutes pressure rising time, and oxidization time is 18 minutes, and oxidizing temperature is 16 ℃;
5. take out described master cylinder after oxidation is finished, and clean, seal oven dry and handle.
Comparative Examples 1: be used to illustrate that the product that adopts the alkaline degreasing oxidation to come out is poor with the product roughness that adopts the inventive method relatively.
A kind of method for oxidation of master cylinder comprises the steps:
1. go up to hang: two pilot holes on the described master cylinder are inserted in two titanium metal rods 5 of hangers, be pressed in the afterbody of master cylinder with rubber-like titanium metal plate 3, the thickness of titanium metal plate 3 is 0.5mm-1mm.Utilize lever principle,,, note up, distribute so that produce gas in the oxidising process with master cylinder afterbody foraminous one side as long as just master cylinder can be compressed with less elastic force because long power arm is arranged.
2. prepare degreaser and oil removal treatment: the aqueous solution that 15% sodium hydroxide and 15 sodium phosphates are formed, with on the master cylinder that hangs up properly be placed in the diluent and handle, treatment temp is 50 degree, the treatment time is 5 minutes.
3. prepare anode oxidation groove liquid: this anode oxidation groove liquid is the sulfuric acid oxidation tank liquor, and wherein, sulfuric acid concentration is 150-170g/l, aluminum ion≤15g/l, chlorine ion concentration≤0.2g/l;
4. anodic oxidation treatment: this anodic oxidation treatment adopts direct supply, the master cylinder that 2. step is handled is an anode, with stereotype symmetrical in the anodizing tank is negative electrode, the constant voltage oxidation is set, oxidation voltage is 20 ± 1V, be 5～8 minutes pressure rising time, and oxidization time is 16～18 minutes, and oxidizing temperature is 16～19 ℃;
5. take out described master cylinder after oxidation is finished, and clean, seal oven dry and handle.
Comparative Examples 2: be used to illustrate that be that not have pressure rising time of the present invention be that 5-8 minute oxide film roughness is good for 1 minute oxide film pressure rising time.
A kind of method for oxidation of master cylinder comprises the steps:
1. go up to hang: two pilot holes on the described master cylinder are inserted in two titanium metal rods 5 of hangers, be pressed in the afterbody of master cylinder with rubber-like titanium metal plate 3, the thickness of titanium metal plate 3 is 0.5mm-1mm.Utilize lever principle,,, note up, distribute so that produce gas in the oxidising process with master cylinder afterbody foraminous one side as long as just master cylinder can be compressed with less elastic force because long power arm is arranged.
2. prepare degreaser and oil removal treatment: after amino acid 28% Sodium phosphate dibasic 15% Sodium Benzoate 10% glycerine 16% citric acid 8 % Sodium dodecylbenzene sulfonatees 1% water 22% mixes, with the volume ratio is the dilution of 4-10% and water, master cylinder behind the last extension is placed in this diluent, adjusting pH is 1.5-2.5, treatment temp is 50 ± 1 degree, and the treatment time is 4-6 minute;
3. prepare anode oxidation groove liquid: this anode oxidation groove liquid is the sulfuric acid oxidation tank liquor, and wherein, sulfuric acid concentration is 150-170g/l, aluminum ion≤15g/l, chlorine ion concentration≤0.2g/l;
4. anodic oxidation treatment: this anodic oxidation treatment adopts direct supply, the master cylinder that 2. step is handled is an anode, with stereotype symmetrical in the anodizing tank is negative electrode, the constant voltage oxidation is set, oxidation voltage is 20 ± 1V, be 1 minute pressure rising time, and oxidization time is 16～18 minutes, and oxidizing temperature is 16～19 ℃;
5. take out described master cylinder after oxidation is finished, and clean, seal oven dry and handle.
Comparative Examples 3: be used to illustrate the hardness height of the oxidation film layer hardness ratio of employing technology of the present invention in oxidation more than 20 degrees centigrade.
A kind of method for oxidation of master cylinder comprises the steps:
1. go up to hang: two pilot holes on the described master cylinder are inserted in two titanium metal rods 5 of hangers, be pressed in the afterbody of master cylinder with rubber-like titanium metal plate 3, the thickness of titanium metal plate 3 is 0.5mm-1mm.Utilize lever principle,,, note up, distribute so that produce gas in the oxidising process with master cylinder afterbody foraminous one side as long as just master cylinder can be compressed with less elastic force because long power arm is arranged.
2. prepare degreaser and oil removal treatment: after amino acid 32%, Sodium phosphate dibasic 15%, Sodium Benzoate 8%, glycerine 12%, citric acid 7 %, Sodium dodecylbenzene sulfonate 1% and water 25% mix, with the volume ratio is the dilution of 4-10% and water, master cylinder behind the last extension is placed in this diluent, adjusting pH is 1.5-2.5, treatment temp is 50 ± 1 degree, and the treatment time is 4-6 minute;
3. prepare anode oxidation groove liquid: this anode oxidation groove liquid is the sulfuric acid oxidation tank liquor, and wherein, sulfuric acid concentration is 150-170g/l, aluminum ion≤15g/l, chlorine ion concentration≤0.2g/l;
4. anodic oxidation treatment: this anodic oxidation treatment adopts direct supply, the master cylinder that 2. step is handled is an anode, with stereotype symmetrical in the anodizing tank is negative electrode, the constant voltage oxidation is set, oxidation voltage is 20 ± 1V, be 5～8 minutes pressure rising time, and oxidization time is 16～18 minutes, and oxidizing temperature is 20-23 ℃;
5. take out described master cylinder after oxidation is finished, and clean, seal oven dry and handle.
The anode oxide film method for testing performance:
Product after above-mentioned five embodiment and three Comparative Examples oxidations are finished is respectively got oxide film in the cylinder hole of the above same area of 13mm at the bottom of the master cylinder hole, carries out roughness respectively, and thickness of oxidation film and hardness detect.
Roughness: measure with roughmeter.
Thickness of oxidation film: adopt metaloscope to measure oxide thickness, concrete operations ginseng GB/T6462-1986
Hardness: GB/T 9790-1988 metal claddings are pressed in the hardness detection and other are about tectum Vickers and Nu Shi microhardness testing.
Detected result according to the above-mentioned method of inspection, see the following form:
As seen from the above table, Comparative Examples 1,2 and 3 is not owing to adopt the method for oxidation of master cylinder of the present invention, and the roughness of its oxygenated products, thickness and hardness do not reach design requirements.
Fig. 3 to Fig. 6 be respectively after the oxidation of the embodiment of the invention 1 and other three Comparative Examples in the cylinder hole same area amplify 400 times fractograph.See map analysis as can be known, the oxide film of the method for oxidation institute oxidation of employing master cylinder of the present invention is good than the oxide film continuity of other three Comparative Examples, and Eutectic Silicon in Al-Si Cast Alloys is capped.Can improve the work-ing life and the safety performance of master cylinder in actual use.
Experiment shows: adopt oxidation hanger of the present invention, can make workpiece and hanger that reliable the contact arranged, by innovation, under conventional oxidizing process condition to oil removing and oxidizing process, satisfying material is that the AlSi7Mg master cylinder is in thickness, roughness, hardness, etc. the strict demand of quality aspect.
Claims (6)
1. the method for oxidation of a master cylinder is characterized in that, this method comprises the steps:
1. go up and hang: two pilot holes on the described master cylinder are hung in the hanger that is used for this master cylinder of oxidation;
2. prepare degreaser and oil removal treatment: after amino acid 26-32%, Sodium phosphate dibasic 10-15%, Sodium Benzoate 8-12%, glycerine 12-16%, citric acid 6-8 %, Sodium dodecylbenzene sulfonate 1-2% and water 18-25% mix, with the volume ratio is the dilution of 4-10% and water, master cylinder behind the last extension is placed in this diluent, adjusting pH is 1.5-2.5, treatment temp is 50 ± 1 degree, and the treatment time is 4-6 minute;
3. prepare anode oxidation groove liquid: this anode oxidation groove liquid is the sulfuric acid oxidation tank liquor, and wherein, sulfuric acid concentration is 150-170g/l, aluminum ion≤15g/l, chlorine ion concentration≤0.2g/l;
4. anodic oxidation treatment: this anodic oxidation treatment adopts direct supply, the master cylinder that 2. step is handled is an anode, with stereotype symmetrical in the anodizing tank is negative electrode, the constant voltage oxidation is set, oxidation voltage is 20 ± 1V, be 5～8 minutes pressure rising time, and oxidization time is 16～18 minutes, and oxidizing temperature is 16～19 ℃;
5. take out described master cylinder after oxidation is finished, and clean, seal oven dry and handle.
2. the method for oxidation of master cylinder according to claim 1, it is characterized in that, described hanger is included in the two ends of laths of metal of the hyphen of at least two levels and fixes two vertical and parallel long metal sheet bars, the top of these two long metal sheet bars curves hook (1), on the horizontal lamellae below described (2), and be provided with at least one suspension system with described hook (1) homonymy.
3. the method for oxidation of master cylinder according to claim 2, it is characterized in that, described suspension system comprises the titanium metal plate (3) of the lath-shaped of a bending, the both sides of this titanium metal plate (3) below are respectively equipped with the titanium mesh (4) of bending, distance between two pilot holes on distance between this two titanium mesh (4) and the described master cylinder equates, respectively be provided with titanium metal rod (5) in described two titanium meshes (4) outside, this titanium metal rod (5) becomes 25～35 degree angles with described long metal sheet bar, the length of described titanium metal rod (5) is 40～50mm, and diameter is than the little 1～1.5mm of pilot hole diameter on the described master cylinder.
4. the method for oxidation of master cylinder according to claim 3 is characterized in that, the thickness of described titanium mesh (4) is 2～3mm.
5. the method for oxidation of master cylinder according to claim 3 is characterized in that, the thickness of described titanium metal plate (3) is 0.5～1mm.
6. the method for oxidation of master cylinder according to claim 3 is characterized in that, described titanium metal plate (3) becomes the secondary bending, and bending angle is 100～120 degree.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105088303A (en) * | 2014-05-16 | 2015-11-25 | 哈尔滨飞机工业集团有限责任公司 | Hard anodizing technological process for 7050 super-thick aluminum alloy |
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