CN113484194A - Method for inspecting oil removal quality of module - Google Patents
Method for inspecting oil removal quality of module Download PDFInfo
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- CN113484194A CN113484194A CN202110744732.1A CN202110744732A CN113484194A CN 113484194 A CN113484194 A CN 113484194A CN 202110744732 A CN202110744732 A CN 202110744732A CN 113484194 A CN113484194 A CN 113484194A
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- module
- oil removal
- quality
- inspecting
- oil
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- 238000000034 method Methods 0.000 title claims abstract description 35
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000000576 coating method Methods 0.000 claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 13
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 53
- 239000007788 liquid Substances 0.000 claims description 39
- 239000000080 wetting agent Substances 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 15
- 238000012360 testing method Methods 0.000 claims description 13
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 238000005530 etching Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000011160 research Methods 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 abstract description 13
- 238000007689 inspection Methods 0.000 abstract description 10
- 239000002344 surface layer Substances 0.000 abstract description 9
- 239000011230 binding agent Substances 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 10
- 229910001220 stainless steel Inorganic materials 0.000 description 8
- 239000010935 stainless steel Substances 0.000 description 8
- 230000007547 defect Effects 0.000 description 4
- 238000005495 investment casting Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229910052845 zircon Inorganic materials 0.000 description 3
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N2013/003—Diffusion; diffusivity between liquids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/204—Keeping clear the surface of open water from oil spills
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a method for inspecting module oil removing quality, which is used for inspecting whether the module surface oil removing quality meets the coating hanging requirement of a shell making process or not in the coating hanging process of a shell making process by taking silica sol as a main binder. The method is used as an inspection means, the product quality is discriminated from the source, the unqualified module is prevented from flowing into the post process, casting scrapping caused by incomplete oil removal is reduced, the product quality is improved, and the product percent of pass is improved. The invention has the advantages of energy saving, environmental protection, high economic benefit, no need of purchasing additional reagents and raw materials, convenient operation and strong field practicability by using the shell-making surface layer slurry as the raw material.
Description
Technical Field
The invention belongs to the field of investment casting, and particularly relates to a method for inspecting oil removal quality of a module.
Background
With the development of the investment casting industry, nowadays, the requirements on the dimensional accuracy and the surface roughness of castings are increasingly increased. And the dimensional accuracy and surface roughness of the casting are directly affected by the wax pattern and the shell. Therefore, the quality of the wax mould set is guaranteed to be very important. Good shell requires no excess grease on the surface of the wax pattern module and good wettability. However, the conventional model wax is hydrophobic, and coating and hanging are difficult to carry out on the surface of the wax mould, so that module degreasing and etching are required to be carried out, redundant grease on the surface of the wax mould is removed, uniform coating and hanging of the shell-making slurry on the surface of the wax mould are ensured, and the defects that sand grains directly contact the surface of the wax mould or are accumulated, pockmarks or sand sticking are formed during casting and the like are avoided. However, the coating quality of the shell surface layer is influenced by the structure of parts and the viscosity of coating adhesives in each batch, the coating quality is unstable, and the surface state of a module lacks an inspection method, so that surface defects are exposed after shell manufacturing and casting, and castings are scrapped.
Disclosure of Invention
The invention aims to overcome the defects and provide a method for inspecting the oil removal quality of a module, which is used for judging the oil removal condition of the module, judging whether the surface quality of a wax mould module is qualified or not before shell manufacturing and pouring, reducing the surface defects of castings caused by incomplete oil removal and improving the product qualification rate.
In order to achieve the above object, the present invention comprises the steps of:
s1 according to SiO in silica sol2Mass fraction, specific surface area of particles and particle size range, and judging the viscosity range of the oil removal detection liquid and the applicability of the specific structural part;
s2, according to SiO2Judging the surface quality of the module by mass fraction, specific surface area of the particles and particle size range;
s3, determining a test research object of the oil removal detection solution;
s4, preparing an oil removal detection solution;
s5, cleaning the surface of the module to be detected;
s6, deoiling the module to be detected by using deoiling detection liquid;
and S7, judging the situation after oil removal.
In S1, silica sol and wetting agent are selected as main components of the oil removal detection solution.
The volume ratio of the silica sol to the wetting agent is 1:5 per mill
In S3, the test object adopts a large bending-torsion profile, a large plane wax module or a part with a structure of an inner cavity and a blind hole.
In S4, 25Kg of silica sol is mixed with 125g of wetting agent, the mixture is stirred uniformly and then stands still, and the preparation of the oil removal detection solution is completed after a large amount of bubbles on the surface of the liquid disappear.
And S5, if the surface of the module to be detected has excess, blowing clean by using compressed air.
In S6, the module to be detected is placed in the deoiling detection liquid for 2-3S, or the deoiling detection liquid is splashed to the surface of the module to be detected.
In S7, if the oil removal detection liquid is not dispersed within 3-5S, the surface of the module achieves the etching effect, the requirement of coating and hanging of the shell-making slurry is met, and the oil removal is qualified; and if the oil removal detection solution is dispersed in 3S-5S, indicating that the oil removal is unqualified.
Compared with the prior art, the coating process for preparing the shell surface layer by using the silica sol as the main binder extracts a method for detecting whether the oil removal quality of the surface of the module meets the coating requirement of the shell preparation process. The method is used as an inspection means, the product quality is discriminated from a source, the unqualified module is prevented from flowing into the post process, casting scrapping caused by incomplete oil removal is reduced, the product quality is improved, and the product percent of pass is improved. The invention has the advantages of energy saving, environmental protection, high economic benefit, no need of purchasing additional reagents and raw materials, convenient operation and strong field practicability by using the shell-making surface layer slurry as the raw material.
Detailed Description
The present invention will be further described with reference to the following examples.
The invention comprises the following steps:
s1 according to SiO in silica sol2Mass fraction, specific surface area of particles and particle size range, and judging the viscosity range of the oil removal detection liquid and the applicability of the specific structural part; in order to ensure that the quality of a module and subsequent shell making are not influenced in the inspection process, and the simulation inspection test conforms to the coating manufacturability of shell making slurry, silica sol and wetting agent are selected as main components of the oil removal detection solution, and the volume ratio of the silica sol to the wetting agent is 1:5 per mill
S2, according to SiO2Judging the surface quality of the module by mass fraction, specific surface area of the particles and particle size range; SiO 22The higher the content, the higher the viscosityThe larger the value, the larger the particle specific surface area and the viscosity, the more complicated the part structure, and the smaller the viscosity of the binder is required, and therefore, the surface quality of the die set is judged by performing tests based on the above parameters.
The required tooling is as follows:
holding the degreasing detection liquid and measuring the size of the stainless steel cylinder: phi 420mm x 400 mm;
the oil removal detection solution comprises the following main components in parts by weight:
volume amount of silica sol required: selecting 1 barrel of silica sol with the specification of 25 Kg/barrel.
Volume amount of wetting agent required: using a graduated cylinder, according to silica sol: wetting agent 1:5 per mill (volume ratio) for preparing a detection solution for standby.
S3, determining a test research object of the oil removal detection solution; when the surface of the wax mould with the large bending-torsion molded surface or the large plane is deoiled, the water-based deoiling agent flows fast on the large plane because the wax mould is of a hydrophobic oleophilic type, and the phenomenon of incomplete surface deoiling is easy to occur. Meanwhile, the part with the structure of the inner cavity and the blind hole is easy to have the phenomenon of incomplete oil removal caused by the fact that the oil removing agent cannot contact with the part. Therefore, the parts with the two types of structures are selected as the test pieces more typically.
S4, preparing an oil removal detection solution; preparing oil removal detection solution according to silica sol and 5 per mill wetting agent (volume ratio). Firstly, 25Kg of silica sol is poured into a prepared stainless steel barrel, 125g of wetting agent is measured by using a measuring cylinder, the silica sol is poured into the stainless steel barrel filled with the silica sol and is stirred to be uniform, the mixture is kept stand, and after a large amount of bubbles on the surface of the liquid disappear, the mixture can be used for module inspection.
S5, cleaning the surface of the module to be detected; the module for deoiling detects should avoid the surperficial redundant material interference such as wax bits, water stain appearing. If the surface has excess materials, compressed air is used for blowing clean.
S6, deoiling the module to be detected by using deoiling detection liquid; through repeated tests, the coating process of the shell-making surface layer is simulated, and the judgment is more accurate by summarizing the following method: and placing the module to be detected in a stainless steel barrel filled with oil removal detection liquid and keeping for 2S-3S, or splashing the detection liquid onto the surface of the part to be detected, and observing the flowing condition of the detection liquid on the surface of the module.
And S7, judging the situation after oil removal. If the detection liquid is not rapidly dispersed within 3-5S, the surface of the module achieves the etching effect, the coating requirement of the shell-making slurry is met, and the oil removal is qualified; and on the contrary, if the detection liquid on the surface of the wax mould is rapidly dispersed within 3S-5S, the oil removal is unqualified.
Example 1:
the working blade of a certain machine high-pressure turbine has large bending torsion and large curvature of the blade profile cross section, and in order to ensure the manufacturability, the main components of the surface layer adopt quick-drying silica sol and zircon powder, wherein SiO in the silica sol2The mass fraction is 10-35%, the specific surface area of the particles is 50m2/g～400m2The particle size per gram is generally within the range of 5nm to 100 nm. In the actual production process, because the blade body area of the blade is large, the edge plate switching part is an acute angle, and dead angles are easy to appear in the liquid flowing process, the fluctuation of oil removing quality is large, the final surface quality of a casting is poor, and the percent of pass is low.
To above problem, carry out the deoiling inspection to this foundry goods module, 1, confirm composition and raw materials: and determining that the components of the deoiling detection solution are surface layer-like slurry silica sol and a wetting agent corresponding to the binder by combining the part structure. Removing zircon powder in a surface layer of a shell making procedure, and only selecting silica sol and a wetting agent according to the mass ratio of sol: wetting agent 1: measuring wetting agent by 5 per mill (volume ratio), and preparing detection solution. 2. Preparing a detection solution: selecting a stainless steel barrel with phi 420mm multiplied by 400mm as a container according to the height of the module, pouring 25Kg of silica sol into the prepared stainless steel barrel, and mixing the silica sol: wetting agent 1: measuring 125g of wetting agent by using a measuring cylinder, pouring the wetting agent into the measuring cylinder, stirring the wetting agent uniformly, standing the solution until a large amount of bubbles on the surface of the solution disappear, and standing the solution for later use. 3. And (5) performing quality confirmation on the surfaces of the four groups of selected modules, and removing redundant substances such as wax chips, water stains and the like. 4. Carrying out an oil removal condition test, placing the module A to be tested in a stainless steel barrel filled with oil removal detection liquid for 2-3S, and observing that the detection liquid is not rapidly dispersed in 3-5S, which shows that the surface of the module A is completely degreased and meets the shell manufacturing requirement; and then placing the module B in a stainless steel barrel filled with oil removal detection liquid and keeping for 2S-3S, observing that the detection liquid is rapidly dispersed in 3S-5S, indicating that the oil removal of the surface of the module B is incomplete and the requirement of shell making is not met, and comparing test results with a record shown in Table 1.
TABLE 1
| Module number | Detecting the dispersion of the liquid | Whether it is qualified or not |
| A | Is not rapidly dispersed in 3S-5S | Qualified |
| B | Fast dispersion in 3S-5S | Fail to be qualified |
Example 2:
the guide vane of a high-pressure turbine of a certain machine has large planes and blind holes, and in order to ensure the manufacturability, the main components of the surface layer adopt silica sol and zircon powder, wherein SiO in the silica sol2The mass fraction is 10-25%, the specific surface area of the particles is 50m2/g～300m2The particle size per gram is generally within the range of 5nm to 100 nm. In the actual production process, because the blade body of the blade has a large plane and the lower edge plate has a positioning blind hole, the liquid flows through the dead angle easily, so that the fluctuation of the oil removing quality is large, the final surface quality of a casting is poor, and the percent of pass is low.
Aiming at the problems, the module is subjected to oil removal inspection: 1. determining the component 2 of the detection liquid, and preparing the detection liquid corresponding to the part structure according to the proportion. 3. And (5) performing quality confirmation on the surfaces of the four groups of selected modules, and removing redundant substances such as wax chips, water stains and the like. 4. Carrying out an oil removal condition test, splashing the detection liquid to the surface of the module C to be detected, observing the flowing condition of the detection liquid on the surface of the module C, and finding that the detection liquid is not rapidly dispersed within 3-5S, so that the surface of the module C is thoroughly degreased and the shell manufacturing requirement is met; splashing the detection liquid onto the surface of the module D to be detected, observing that the detection liquid is not rapidly dispersed in 3S-5S, and indicating that the surface of the module D is thoroughly degreased to meet the shell manufacturing requirement; and splashing the detection liquid onto the surface of the module E to be detected, observing that the detection liquid is rapidly dispersed in 3S-5S, and showing that the surface of the module E is not completely deoiled and does not meet the shell manufacturing requirement. The test results are reported in Table 2.
TABLE 2
At present, the method forms effective files and simultaneously solidifies the effective files to relevant production links, and results show that after the method is adopted for detection, detection liquid can be prepared according to the viscosity of surface layer coating suitable for different structures in a targeted mode, a problem module with incomplete oil removal on the surface can be accurately screened, complaints of post-procedures are reduced, product quality is improved, the problem module can be effectively controlled in the procedure, and manufacturing cost is reduced. The subsequent product quality was followed according to the method of the invention, giving tables 3 and 4. The table 3 traces back a table of the quality condition of the casting not adopting the detection method, and the table 4 traces back a table of the quality condition of the casting adopting the method.
TABLE 3
TABLE 4
As can be seen from tables 3 and 4, the quality of the subsequent casting product is obviously improved by adopting the invention to carry out module control. Meanwhile, the invention is not directed at specific materials, structures and fields, and has certain generalizability:
(1) besides the silica sol shell-making material, the invention can also be applied to the inspection of the surface quality of the module of the special-structure shell made of other binding agents.
(2) Besides the aero-engine investment casting industry, the method can also be applied to the surface quality inspection of general modules in military and civil integration or other civil investment casting industries.
While the present invention has been described in terms of its preferred embodiments, and it will be understood by those skilled in the art that the foregoing and other changes, omissions and substitutions and changes in the form and details of the embodiments described herein may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A method for inspecting oil removal quality of a module is characterized by comprising the following steps:
s1 according to SiO in silica sol2Mass fraction, specific surface area and particle size range of the particles, and judging the viscosity range of the oil removal detection liquid and the applicability of the specific structural part;
s2, according to SiO2Judging the surface quality of the module by mass fraction, specific surface area of the particles and particle size range;
s3, determining a test research object of the oil removal detection solution;
s4, preparing an oil removal detection solution;
s5, cleaning the surface of the module to be detected;
s6, deoiling the module to be detected by using deoiling detection liquid;
and S7, judging the situation after oil removal.
2. The method for inspecting oil removing quality of module set according to claim 1, wherein in S1, silica sol and wetting agent are selected as main components of the oil removing detection liquid.
3. The method for inspecting oil removing quality of module set according to claim 2, wherein the volume ratio of silica sol and wetting agent is 1:5 ‰.
4. The method of claim 1, wherein in step S3, the test subject is a large cranked profile, a large flat wax mold, or a part with a configuration of cavities and blind holes.
5. The method for inspecting oil removing quality of module set according to claim 1, wherein in S4, 25Kg of silica sol is mixed with 125g of wetting agent, and after stirring uniformly, standing is carried out, and after a large amount of bubbles on the liquid surface disappear, the preparation of oil removing detection liquid is completed.
6. The method for inspecting oil removing quality of module set according to claim 1, wherein in S5, if there is excess on the surface of the module set to be inspected, compressed air is used to blow clean.
7. The method for inspecting oil removal quality of module set according to claim 1, wherein in S6, the module set to be inspected is placed in the oil removal detection solution for 2-3S.
8. The method for inspecting oil removing quality of module set according to claim 1, wherein in S6, the oil removing detection liquid is splashed to the surface of the module set to be inspected.
9. The method for inspecting oil removal quality of the module according to claim 1, wherein in S7, if the oil removal detection liquid is not dispersed within 3-5S, it indicates that the surface of the module achieves the etching effect, the coating requirement of the shell-making slurry is met, and the oil removal is qualified.
10. The method for inspecting oil removal quality of a module set according to claim 9, wherein if the oil removal detection solution is dispersed within 3S-5S, the oil removal is not qualified.
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