CN110592590A - Solution and method for titanium alloy skin molding surface chemical milling and sample plate manufacturing method - Google Patents
Solution and method for titanium alloy skin molding surface chemical milling and sample plate manufacturing method Download PDFInfo
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- CN110592590A CN110592590A CN201911047452.4A CN201911047452A CN110592590A CN 110592590 A CN110592590 A CN 110592590A CN 201911047452 A CN201911047452 A CN 201911047452A CN 110592590 A CN110592590 A CN 110592590A
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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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/02—Local etching
- C23F1/04—Chemical milling
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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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/26—Acidic compositions for etching refractory metals
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Abstract
The invention discloses a solution, a method and a sample plate manufacturing method for titanium alloy skin molding surface chemical milling, wherein the solution comprises 50-150g/L nitric acid, 20-90g/L hydrofluoric acid, 5-10g/L additive and the balance of water. Nitric acid and hydrofluoric acid have strong corrosivity and can corrode the exposed titanium alloy skin, and the addition of the additive can ensure that the wall thickness of a chemical milling area is uniform, so that the defects of grooves and the like can not occur, and meanwhile, the chemical milling glue can also ensure that the chemical milling glue can not be corroded in the corrosion process, and the completeness of an area which does not need to be corroded is kept. Water can dilute the bulk solution as the case may be, thereby adjusting the corrosivity of the solution. Compared with the solution in the prior art, the solution can improve the surface smoothness and the wall thickness uniformity of the skin and ensure the stability of chemical milling glue in the chemical milling process.
Description
Technical Field
The invention relates to a surface engineering technology, in particular to a solution and a method for chemical milling of a titanium alloy skin molding surface and a template manufacturing method.
Background
With the development of the aviation industry, the trend of large-scale and integration of sheet metal parts is more and more obvious, and a skin is an important component of the sheet metal parts of an airplane and is one of important key technologies for developing the airplane. The aircraft skin is complex in stress, directly contacts the outside, is seriously loaded and has extremely high requirement on the shape precision; meanwhile, in order to meet the weight reduction requirement, the aircraft skin is generally a thin plate part and is designed into unequal thickness, and some areas are even continuously variable sections. At present, numerical control machining is often adopted to ensure the final precision requirement aiming at the skin parts with complex profiles and geometric shapes.
As is well known, titanium alloy has the comprehensive properties of small density, high specific strength, good fracture resistance and good corrosion resistance, and is widely applied to the fields of aviation and aerospace. The titanium alloy skin is particularly suitable for processing the aircraft skin, and compared with the traditional aluminum alloy material, the titanium alloy skin can greatly reduce the weight of the aircraft and improve the flight performance of the aircraft, thereby reducing the operation cost of the aircraft; furthermore, when the contact surface temperature of aircraft skins is generally above 200 ℃, aluminum skins are no longer suitable and need to be replaced with titanium alloys. However, the titanium alloy has poor cutting performance, and due to the small thermal conductivity, the heat generated during cutting is not easy to dissipate, is accumulated on the cutter and the workpiece, so that the cutter is quickly worn, and is easy to ablate when a large margin is machined. Therefore, the machining difficulty is higher for the titanium alloy skin parts with thin walls and complex shapes. For this purpose, the titanium alloy aircraft skin with the complex profile is processed by adopting a chemical milling method instead of conventional mechanical processing.
Chemical milling (chemical milling for short) is a special processing method for exposing a part to be processed on a part to a chemical medium (solution) for corrosion to obtain a required shape and size, the method can improve the physical property of the surface of a material and reduce the abrasion of a cutter in processing, so that the method is widely applied to the aerospace industry, and the titanium alloy chemical milling process level is greatly improved along with the rapid development of the aerospace industry in China in recent years, and the titanium alloy chemical milling method is gradually applied to processing parts in various shapes, such as flat plates, thin plates, cylindrical parts, single-curvature parts and the like.
The titanium alloy skin part for the airplane in the prior part has the problems of complex structure, obvious torsion and bending, small curvature radius, narrow width of a chemical milling area rib and difficulty in accurate control of precision in processing by adopting the existing chemical milling process.
Firstly, the chemical milling liquid proportion influences the precision of parts. When the existing chemical milling solution is used for proportioning chemical milling, the surface roughness of the part basically meets Ra of less than or equal to 3.2 microns, but the uniformity of the wall thickness of a chemical milling area is poor, and the defects of grooves and the like are often caused; in addition, in the chemical milling process by adopting the existing chemical milling solution, the stability of the chemical milling protective glue is poor, so that the existing titanium alloy chemical milling solution is difficult to realize accurate processing on parts with high requirements on wall thickness precision.
Secondly, the chemical milling area engraving method affects the precision of the part. At present, two methods are universal for engraving types in chemical milling areas, wherein one method is manual engraving; another is laser scribing, which uses a combination of laser and digital manufacturing processes. For a part with a complex structure, if the thin-wall type sample plate is adopted, the rigidity is low, the sample plate is not tightly attached to the part in the using process, and the situation that the sample plate deforms to cause inaccurate positioning can occur; the precision of the laser-etching type is higher, but for parts with complex structures and smaller curvature radius, a positioner on the existing laser-etching type machine is blocked in the parts and cannot be positioned, and the laser-etching type machine cannot be adopted.
Therefore, the invention provides a solution, a method and a template manufacturing method for the titanium alloy skin profile chemical milling to solve the problems.
Disclosure of Invention
Technical problem to be solved
The invention provides a solution, a method and a template manufacturing method for chemical milling of a titanium alloy skin molding surface, which are used for solving the problems that in the prior art, a chemical milling solution is not uniform in corrosion of a titanium alloy skin, a groove is formed, chemical milling protective glue in the chemical milling solution is poor in stability, a chemical milling template in manual engraving is low in rigidity, and the template is not tightly attached to the skin, so that the positioning is not accurate.
(II) technical scheme
In order to solve the technical problem, the invention provides a solution for titanium alloy skin molding surface chemical milling, which comprises a mixed acid solution of nitric acid and hydrofluoric acid, an additive and water.
Preferably, soluble tetravalent titanium ions are also included.
Preferably, the concentration of the nitric acid is 50-150g/L, and the concentration of the hydrofluoric acid is 20-90 g/L.
Preferably, the additive is one or more of ethylene glycol monobutyl ether, sodium dodecyl sulfate, urea and an active agent HY-12.
Preferably, the concentration of the nitric acid is 50-150g/L, the concentration of the hydrofluoric acid is 20-90g/L, and the concentration of the additive is 5-10 g/L.
The invention also provides a manufacturing method of the titanium alloy skin molded surface chemical milling sample plate, which comprises the following steps:
s1: designing a chemical milling template mould, wherein the size and the shape of the molded surface of the chemical milling template mould are consistent with the size and the shape of the outer surface of the skin molded surface;
s2: a positioning hole is formed in the chemical milling template mould, and a pin penetrates through the positioning hole to fix the bushing;
s3: brushing resin with a desired thickness on the chemical milling template mould to form a resin template, and curing the resin template;
s4: and calculating an etching ratio, determining the scaling quantity of the skin chemical milling area through the etching ratio, then carrying out mechanical processing on the cured resin template chemical milling area to form a chemical milling template, and taking down the chemical milling template after the chemical milling template is finished.
Preferably, in step S3, for each resin coating, another glass fiber layer is laid on the corresponding resin layer to satisfy the toughness of the chemical milling template.
Preferably, reinforcing ribs are arranged in a smooth area of the chemical milling area so as to meet the requirements of rigidity and stability of the chemical milling sample plate; the resin is epoxy resin.
Preferably, in step S4, the etching ratio is calculated by the formula:
in the formula:
e-etching ratio;
D1-width of the cut surface before chemical milling in millimeters (mm);
D2the width of the section after chemical milling is in millimeters (mm);
D3chemical milling depth in millimeters (mm).
The invention also provides a method for the molding surface chemical milling of the titanium alloy skin, which comprises the following steps:
a. removing oil, namely cleaning the surface of the skin by using a cleaning agent, cleaning the surface of the skin by using flowing clear water, and finally drying the skin by using clean air;
b. coating the chemical milling glue, namely brushing the chemical milling glue on the surface of the skin;
c. carving, namely manually carving, sticking the chemical milling sample plate and the skin together by using a positioning hole on the chemical milling sample plate and fixing, in the scribing process, vertically milling the surface by using a cutter, tightly sticking the chemical milling sample plate, and removing chemical milling glue in the chemical milling area of the skin after carving;
d. chemical milling, namely placing the skin subjected to the carving in a chemical milling solution;
e. and (6) inspecting, namely inspecting the chemically milled skin.
Preferably, in the step d, the angle and the direction of the chemical milling of the skin are continuously adjusted to avoid generating air bags; and starting compressed air to stir the solution so as to ensure the uniformity of the wall thickness of the skin chemical milling area.
(III) advantageous effects
The technical scheme of the invention has the following advantages:
(1) the chemical milling solution comprises nitric acid, hydrofluoric acid, an additive and water, wherein the nitric acid and the hydrofluoric acid have strong corrosivity and can corrode an exposed titanium alloy skin, the addition of the additive can ensure that the wall thickness of a chemical milling area is uniform, the defects of grooves and the like cannot occur, meanwhile, the chemical milling glue can also ensure that the chemical milling glue cannot be corroded in the corrosion process, and the integrity of an area which does not need to be corroded is kept. Water can dilute the bulk solution as the case may be, thereby adjusting the corrosivity of the solution. In the post chemical milling process, the angle and the direction of the chemical milling of the skin are continuously adjusted, and meanwhile, compressed air is started to stir the solution, so that the surface smoothness and the wall thickness uniformity of the chemical milling area of the skin can be improved and the stability of chemical milling glue in the chemical milling process is ensured compared with the solution in the prior art.
(2) The material adopted by the method for manufacturing the titanium alloy skin molding surface chemical milling sample plate is epoxy resin, the epoxy resin has plasticity and good machinability and can be better attached to the surface of the skin, and the reinforcing ribs are arranged in the smooth area of the chemical milling area, so that the rigidity and the stability of the chemical milling sample plate can be increased.
Drawings
FIG. 1 is a schematic structural diagram of a chemical milling template manufactured in the titanium alloy skin molding surface chemical milling method and the template manufacturing method of the present invention;
FIG. 2 is a schematic structural diagram of the titanium alloy skin in the method for forming the titanium alloy skin surface and the template manufacturing method according to the present invention;
fig. 3 is a schematic structural diagram of a chemical milling template in the titanium alloy skin molding surface chemical milling method and the template manufacturing method of the present invention.
FIG. 4 is a schematic structural diagram of another chemical milling template in the titanium alloy skin molding surface chemical milling method and the template manufacturing method of the present invention.
In the figure: 1. chemically milling a template mould; 2. chemically milling a sample plate; 3. a chemical milling template chemical milling area; 4. positioning holes; 5. a skin chemical milling area; 6. covering a skin; 7. and (5) reinforcing ribs.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-3, the present invention provides a titanium alloy skin profiling solution comprising a mixed acidic solution of nitric acid and hydrofluoric acid, an additive, and water.
In the embodiment, the nitric acid and the hydrofluoric acid have strong corrosivity, the mixed acid solution of the nitric acid and the hydrofluoric acid can corrode metal on the surface of the titanium alloy skin, the addition of the additive can ensure that the wall thickness of a skin chemical milling area is uniform, the defects of grooves and the like can not occur, meanwhile, the chemical milling glue can also be ensured not to be corroded in the corrosion process, and the completeness of a corrosion-free area is kept. The water can dilute the whole solution according to specific conditions, and the corrosivity of the solution is adjusted. Therefore, the proportion of the solution can ensure the wall thickness precision and the surface quality after chemical milling.
Specifically, the chemical milling solution may contain soluble tetravalent titanium ions.
Specifically, the concentration of nitric acid is 50-150g/L, and the concentration of hydrofluoric acid is 20-90 g/L; the additive is one or more of ethylene glycol monobutyl ether, sodium dodecyl sulfate, urea and an active agent HY-12, the concentration of the additive is 5-10g/L, and the chemical washing solution can contain soluble tetravalent titanium ions, and the balance of water.
The invention also provides a manufacturing method of the titanium alloy skin molded surface chemical milling sample plate, which comprises the following steps:
s1: designing a chemical milling template mould 1, wherein the size and the shape of the molded surface of the chemical milling template mould 1 are consistent with the size and the shape of the outer surface of the skin molded surface;
s2: a positioning hole is formed in the chemical milling template mould 1, and a pin penetrates through the positioning hole to fix the bushing;
s3: brushing resin with a desired thickness on the chemical milling sample plate mould 1 to form a resin sample plate, and curing the resin sample plate;
s4: and (3) calculating an etching ratio, determining the scaling quantity of the skin chemical milling area 5 through the etching ratio, then carrying out mechanical processing on the cured resin template chemical milling area to form a chemical milling template, and taking down the chemical milling template after the chemical milling template is finished.
In the above embodiment, in step S1, the design of the chemical milling template mold 1 may be performed on the basis of the molding mold, and the chemical milling area profile in the chemical milling template mold 1 is consistent with the chemical milling area profile of the molding mold; in step S2, a pin fixing bushing penetrates through a positioning hole formed in the chemical milling template mold 1, the pin fixing bushing adheres to resin in the resin brushing process, and finally the pin fixing bushing remains on the chemical milling template along with the resin curing to form a positioning hole 4, and the pin fixing bushing can play a role in fixing the chemical milling template.
Specifically, in step S3, glass fibers are laid during resin brushing, and after each resin brushing of a certain thickness, glass fibers of a certain thickness are laid on the corresponding resin layer to satisfy the toughness of the chemical milling template. The thickness of the resin for brushing and the thickness of the glass fiber for spreading are determined according to actual conditions so as to meet the requirements of the toughness and the thickness of the chemical milling sample plate.
Specifically, the reinforcing ribs 7 are arranged in the smooth area of the chemical milling area so as to meet the requirements of rigidity and stability of the chemical milling sample plate and ensure that the manufactured chemical milling sample plate can be used and processed; the resin is an epoxy resin.
Specifically, in step S4, the etching ratio is calculated by the formula:
in the formula:
e-etching ratio;
D1-width of the cut surface before chemical milling in millimeters (mm);
D2the width of the section after chemical milling is in millimeters (mm);
D3chemical milling depth in millimeters (mm).
The calculated erosion ratio is calculated through experiments, the erosion ratio is calculated through the experiments, the scaling quantity of the skin chemical milling area 5 is calculated, and finally the chemical milling area 3 of the chemical milling sample plate is machined according to the scaling quantity.
The invention also provides a method for the molding surface chemical milling of the titanium alloy skin, which comprises the following steps:
a. removing oil, namely cleaning the surface of the skin 6 by using a cleaning agent, cleaning the cleaning agent on the surface of the skin 6 by using flowing clear water, and finally drying the skin by using clean air;
b. coating the chemical milling glue, namely brushing the chemical milling glue on the surface of the skin 6;
c. carving, wherein manual carving is adopted, the chemical milling sample plate and the skin 6 are attached together and fixed by utilizing the positioning hole 4 on the chemical milling sample plate 2, in the scribing process, a cutter is perpendicular to the milling surface and is tightly attached to the chemical milling sample plate 2, and chemical milling glue in the skin chemical milling area 5 is removed after carving;
d. chemical milling, namely placing the skin subjected to the carving in a chemical milling solution;
e. and (6) inspecting, namely inspecting the chemically milled skin.
In the step d, in the chemical milling process of the skin, continuously adjusting the angle and the direction of the skin by using an auxiliary tool so as to avoid generating an air bag; and if necessary, starting compressed air to stir the solution so as to ensure uniform corrosion and ensure the uniformity of the wall thickness of the skin chemical milling area 5. Meanwhile, in the chemical milling process of the skin 6, the completeness of the chemical milling glue is observed, and the corrosion of the area which does not need to be processed due to the incompleteness of the chemical milling glue is avoided.
The titanium alloy skin shown in figure 2 has torsion and bending, the curvature radius is 85mm, the minimum rib width is 8mm, and the thickness is chemically milled from 2.5mm to 1.2 mm. The skin chemical milling is carried out by adopting the chemical milling liquid formula and the resinification milling sample plate to assist manual carving, and the implementation steps are as follows:
1. preparation of chemical milling solution
The chemical milling solution comprises 50-150g/L nitric acid, 20-90g/L hydrofluoric acid, 5-10g/L additive and the balance of water. Wherein the chemicals are analytically pure, and the water quality meets the requirement of HB 5472 on water quality; in the implementation process of the method, if the purity of the adopted medicines and the grade of water quality do not meet the requirements in the actual production, impurities may exist, and the quality of chemical milling may be affected.
2. Calculating the etching ratio
Through tests, the sample chemical milling is carried out in the chemical milling liquid prepared by the invention. Determining the chemical milling etching ratio to be 0.85, and further calculating the scale size scaling of the skin chemical milling area;
3. design and manufacture of chemical milling sample plate
Designing a chemical milling sample plate mould, reserving a positioning hole of the chemical milling sample plate on the mould, and fixing a bushing on the positioning hole by a pin, namely embedding the bushing on the chemical milling sample plate;
and (3) brushing epoxy resin glue on the die body, paving a layer of glass fiber after brushing a layer of epoxy resin glue to ensure the toughness of the chemical milling sample plate until the thickness of the chemical milling sample plate meeting the requirement is 8mm, and curing for later use. Determining the scaling of a skin chemical milling area through an etching ratio, carrying out mechanical processing on the cured resin template chemical milling area, and taking down the template after the mechanical processing is finished;
4. chemical milling machine
1) Oil removal
The surface of the part is cleaned by a cleaning agent, then the surface of the part is cleaned by flowing water, and the part is dried by clean air.
2) Glue spreading
And (3) brushing the chemical milling glue on the surface of the part, and brushing the single surface of the part for three times, wherein the actual measurement of the glue film is 0.2-0.3 mm.
3) Carving shape
Manually carving is adopted, and the chemical milling sample plate and the part are attached together to be accurately positioned and fixed; and in the line scribing process, the cutter is vertical to the chemically milled surface, the sample plate is tightly attached, and the protective glue in the skin chemically milled area is removed after the model is carved.
4) Chemical milling machine
The complex profile skin adopts the continuous angle and the direction of adjusting the part chemical milling of auxiliary fixtures in the process of chemical milling, opens compressed air simultaneously and stirs the corrosive liquid, guarantees the homogeneity of part wall thickness effectively, and the integrality of chemical milling in-process glued membrane is good.
5) Examination of
After chemical milling, the complex molded surface skin is checked, and after chemical milling, the adhesive film is completely covered without phenomena of glue failure, foaming, peeling and the like; after chemical milling, the actual measurement of the wall thickness is 1.2 (+ -0.05) mm, and the actual measurement of the profile tolerance meets +/-0.5 mm; the surface state is smooth and consistent, the defects such as grooves and the like do not appear, the roughness Ra is less than or equal to 1.6 mu m, and the point positions of the molded surface measured by three coordinates are within +/-0.8 mm.
The invention is suitable for both simple skin and complex skin, and has more remarkable effect compared with the prior art when being particularly used for the complex skin
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (11)
1. The utility model provides a solution that titanium alloy covering profile chemical milling which characterized in that: comprises a mixed acid solution of nitric acid and hydrofluoric acid, an additive and water.
2. The titanium alloy skin profiling solution of claim 1, wherein: also included are soluble tetravalent titanium ions.
3. The titanium alloy skin profiling solution of claim 1 or 2, wherein: the concentration of the nitric acid is 50-150g/L, and the concentration of the hydrofluoric acid is 20-90 g/L.
4. The titanium alloy skin profiling solution of claim 1 or 2, characterized by: the additive is one or more of ethylene glycol monobutyl ether, sodium dodecyl sulfate, urea and an active agent HY-12.
5. The titanium alloy skin profiling solution of claim 4, characterized by: the concentration of the nitric acid is 50-150g/L, the concentration of the hydrofluoric acid is 20-90g/L, and the concentration of the additive is 5-10 g/L.
6. The manufacturing method of the titanium alloy skin molded surface chemical milling template is characterized by comprising the following steps of:
s1: designing a chemical milling template mould (1), wherein the size and the shape of the molded surface of the chemical milling template mould (1) are consistent with the size and the shape of the outer surface of the skin molded surface;
s2: a positioning hole is formed in the chemical milling template mould (1), and a pin penetrates through the positioning hole to fix the bushing;
s3: brushing resin with a desired thickness on the chemical milling sample plate mould (1) to form a resin sample plate, and curing the resin sample plate;
s4: and (3) calculating an etching ratio, determining the scaling quantity of the skin chemical milling area (5) through the etching ratio, then carrying out mechanical processing on the cured resin template chemical milling area to form a chemical milling template (2), and taking down the chemical milling template after the chemical milling template is finished.
7. The method for manufacturing the titanium alloy skin profiling template as claimed in claim 6, wherein the method comprises the following steps: in step S3, each resin layer is coated, and a glass fiber layer is further laid on the corresponding resin layer to satisfy the toughness of the chemical milling template.
8. The method for manufacturing the titanium alloy skin profiling template as claimed in claim 6, wherein the method comprises the following steps: reinforcing ribs (7) are arranged in the smooth area of the chemical milling area so as to meet the requirements of rigidity and stability of the chemical milling sample plate; the resin is epoxy resin.
9. The method for manufacturing the titanium alloy skin profiling template as claimed in claim 6, wherein the method comprises the following steps: in step S4, the etching ratio is calculated by the formula:
in the formula:
e-etching ratio;
D1-width of the cut surface before chemical milling in millimeters (mm);
D2the width of the section after chemical milling is in millimeters (mm);
D3chemical milling depth in millimeters (mm).
10. A method for the surface chemical milling of a titanium alloy skin is characterized by comprising the following steps:
a. removing oil, namely cleaning the surface of the skin (6) by using a cleaning agent, cleaning the cleaning agent on the surface of the skin (6) by using flowing clear water, and finally drying the skin by using clean air;
b. coating the chemical milling glue, namely brushing the chemical milling glue on the surface of the skin (6);
c. carving, wherein manual carving is adopted, the chemical milling sample plate and the skin (6) are attached together and fixed by utilizing a positioning hole (4) on the chemical milling sample plate (2), in the process of carving, a cutter is used for vertically milling the surface, the chemical milling sample plate (2) is closely attached, and chemical milling glue in a skin chemical milling area (5) is removed after carving;
d. chemical milling, namely placing the skin subjected to the carving in a chemical milling solution;
e. and (6) inspecting, namely inspecting the chemically milled skin.
11. The method of profiling a titanium alloy skin as recited in claim 10, wherein: in the step d, continuously adjusting the angle and the direction of the skin chemical milling to avoid generating air bags; and starting compressed air to stir the solution so as to ensure the uniformity of the wall thickness of the skin chemical milling area (5).
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| CN111785643A (en) * | 2020-06-12 | 2020-10-16 | 江苏富乐德半导体科技有限公司 | Titanium foil chemical thinning method |
| CN111844142A (en) * | 2020-08-17 | 2020-10-30 | 沈阳飞机工业（集团）有限公司 | Aluminum alloy chemical milling protective layer separation cutting tool and separation cutting method thereof |
| CN115488404A (en) * | 2022-09-28 | 2022-12-20 | 陕西飞机工业有限责任公司 | Processing method of double-curvature milling skin |
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| CN111785643B (en) * | 2020-06-12 | 2022-03-04 | 江苏富乐华半导体科技股份有限公司 | Titanium foil chemical thinning method |
| CN111844142A (en) * | 2020-08-17 | 2020-10-30 | 沈阳飞机工业（集团）有限公司 | Aluminum alloy chemical milling protective layer separation cutting tool and separation cutting method thereof |
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| CN115488404A (en) * | 2022-09-28 | 2022-12-20 | 陕西飞机工业有限责任公司 | Processing method of double-curvature milling skin |
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