Alcohol solution titanium alloy product screening method

Abstract

The invention discloses an alcoholic solution titanium alloy product screening method, and belongs to the technical field of titanium alloy product screening. The method comprises the following steps: preparing a low-density alcohol solution, putting a first standard ball into the low-density alcohol solution, and adding water until the first standard ball is suspended; preparing a high-density alcohol solution, putting the second standard ball into the high-density alcohol solution, and adding industrial alcohol until the second standard ball is suspended; the titanium alloy hollow balls to be screened are put into a low-density solution, and floating titanium alloy hollow balls are removed; and putting the titanium alloy hollow spheres which sink to the bottom or suspend into a high-density solution, wherein the titanium alloy hollow spheres which float or suspend are qualified products. Based on the density difference sorting principle, the characteristics of low toxicity and transparency of the alcohol solution are utilized, the screening accuracy is ensured through standard ball calibration, manual one-by-one operation is not needed, large-scale screening is achieved, the efficiency is improved, the labor intensity is reduced, and the method is suitable for large-scale production screening of the titanium alloy hollow balls.

Description

Technical Field

[0001] This invention belongs to the field of titanium alloy product screening technology, specifically a method for screening titanium alloy products using alcohol solution. Background Technology

[0002] In the large-scale production process of titanium alloy hollow spheres, quality screening of large batches of products is a crucial step in ensuring product consistency. Current technology commonly uses high-precision electronic balances to weigh each titanium alloy hollow sphere individually, judging product quality based on weight differences. While this method meets accuracy requirements, it reveals significant limitations in actual production: when faced with large-scale screening needs (e.g., tens of thousands of spheres), individual weighing leads to low screening efficiency, not only extending the production cycle but also significantly increasing the workload of operators, making it unsuitable for the demands of large-scale production.

[0003] Research has found that the density of a qualified hollow titanium alloy sphere falls within a specific range, namely 0.88 g / cm³. 3 Up to 0.93 g / cm 3 Based on this characteristic, developing an efficient and low-labor-intensive screening method by utilizing density differences has become a core direction for addressing the pain points of existing technologies. Summary of the Invention

[0004] The purpose of this invention is to provide a method for screening titanium alloy products using alcohol solutions. This invention is based on the principle of density difference sorting, and utilizes the low toxicity and transparency of alcohol solutions. It ensures accurate screening through standard ball calibration, eliminating the need for manual operation of each ball, enabling large-scale screening, improving efficiency, reducing labor intensity, and is suitable for the large-scale production and screening of hollow titanium alloy balls.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A method for screening titanium alloy products using alcohol solutions includes the following steps:

[0007] S1. Preparation of screening solution:

[0008] Preparation of low-density alcohol solution: Pour industrial alcohol into the first open container, then add a solution with a density of 0.88 g / cm³. 3 Place the first standard ball into the solution, add water and stir until the first standard ball is suspended in the solution, then stop adding water.

[0009] Preparation of high-density alcohol solution: Pour water into a second open container, then add water with a density of 0.93 g / cm³. 3 The second standard ball is placed in it, then industrial alcohol is added and stirred evenly until the second standard ball is suspended in the solution, then the addition of industrial alcohol is stopped;

[0010] S2. First screening: Place the hollow titanium alloy spheres to be screened into the low-density alcohol solution, ensuring that no accumulation occurs during placement;

[0011] S3. Second screening: First, remove the hollow titanium alloy balls floating on the surface of the low-density alcohol solution. Then, remove the hollow titanium alloy balls that sink or are suspended and place them into the high-density alcohol solution. The hollow titanium alloy balls that float or are suspended in the high-density alcohol solution are the qualified products selected.

[0012] This application is based on the principle of "density difference sorting" and achieves batch screening by preparing two alcohol solutions with precisely controllable densities (corresponding to the upper and lower limits of the density of qualified hollow titanium alloy spheres, respectively):

[0013] The first step uses a low-density solution (0.88 g / cm³). 3 Remove those with excessively low density (<0.88 g / cm³). 3 For substandard products, the second step involves using a high-density solution (0.93 g / cm³). 3 Remove items with excessive density (>0.93 g / cm³). 3 Of the substandard products, those with a density between 0.88 and 0.93 g / cm³ were ultimately retained. 3 Qualified products between the specified range.

[0014] Compared to the existing method of weighing each sphere individually, this method can process a large number of hollow titanium alloy spheres at once, effectively improving screening efficiency and meeting the needs of large-scale production.

[0015] As some possible implementations of this application, in step S1, after industrial alcohol is poured into the first open container, the liquid level is 10-15 mm from the bottom of the container; after water is poured into the second open container, the liquid level is 10-15 mm from the bottom of the container. By limiting the distance between the liquid level and the bottom wall of the container, it can be ensured that the liquid depth can completely submerge the titanium alloy hollow sphere, while avoiding disturbance caused by excessive liquid level.

[0016] As one possible implementation of this application, after the titanium alloy hollow ball that has sunk to the bottom or is suspended is retrieved in step S3, it is first placed on a drying component to absorb the remaining low-density solution, and then transferred to a high-density solution.

[0017] Because low-density alcohol solution may remain on the surface of the hollow titanium alloy spheres that sink or float, if directly transferred to a high-density solution, the residual liquid will dilute or change the density of the high-density solution, causing it to deviate from 0.93 g / cm³. 3 The standards used affect the accuracy of the second screening.

[0018] Based on this, this application, by setting up a drying component, can absorb the low-density alcohol solution on the surface of the titanium alloy hollow sphere, thereby reducing its interference with the density of the high-density solution.

[0019] As one possible implementation method of this application, in step S1, after each screening, a corresponding standard ball (density 0.88 g / cm³) is used. 3 Or 0.93g / cm 3 The density of the solution is checked using hollow titanium alloy spheres. If the floating or sinking state of the standard spheres changes, water or alcohol is added in time to adjust it back to the standard state to ensure the accuracy of the screening.

[0020] As some possible embodiments of this application, the drying assembly includes a moisture-absorbing box with a top opening and a water-absorbing material disposed on the bottom surface of the moisture-absorbing box, the water-absorbing material including a first composite felt disposed on the bottom surface of the moisture-absorbing box.

[0021] The first composite felt comprises the following components in parts by weight:

[0022] 60-65 parts of the substrate: composed of polyester (PET) microfiber (5-8μm in diameter) and nylon (PA6) microfiber (8-10μm in diameter) in a 3:1 ratio;

[0023] 25-30 parts adsorbent: hydrophobically modified coconut shell activated carbon (particle size 50-80μm);

[0024] 6-10 parts reinforcing agent: surface epoxy silane modified glass microfibers (diameter 3-5μm, length 50-80μm);

[0025] 3-4 parts adhesive: high-elasticity solvent-based polyurethane;

[0026] 0.5-1 part elastic reinforcing agent: spandex microfiber (diameter 1-2μm).

[0027] The specific functions of the above components are as follows:

[0028] PET microfiber: As the core skeleton of the first composite felt, it maintains structural stability through rolling friction and repeated compression (such as the pressure of subsequent cover plate closure) of batches of titanium alloy hollow balls (such as 50-100 balls per batch) with high tensile strength, avoiding fiber breakage caused by long-term wear and reducing the risk of fiber shedding from the source.

[0029] PA6 microfiber: Retains moderate hydrophilicity, quickly adsorbs aqueous components in residual liquid, and forms a water-alcohol dual-phase adsorption system in synergy with activated carbon, ensuring that the basic moisture absorption capacity is not weakened.

[0030] Adsorbent: Reduces impact damage to the composite felt structure when titanium alloy hollow spheres collide, while maintaining the porous structure and improving adsorption capacity. After hydrophobic modification (such as silicone oil modification), the surface hydrophilicity is balanced, which can adsorb water and alcohol in the residual liquid, improve the drying rate, and meet the rapid drying needs of batch titanium alloy hollow spheres.

[0031] Reinforcing agent: Modified with epoxy silane (such as KH560), it reacts chemically with the isocyanate groups of the binder (solvent-based polyurethane) to form covalent bonds, thereby improving interfacial bonding and completely solving the problem of fiber shedding during friction or regeneration.

[0032] Adhesive: After low-temperature curing (60-70℃), it forms a denser, flexible film that firmly encapsulates the substrate, activated carbon, and glass microfibers, preventing delamination. The resulting high elasticity buffers the impact force of the hollow titanium alloy spheres, preventing scratches on the titanium alloy surface; it is also resistant to alcohol swelling, making it suitable for long-term use in alcohol environments.

[0033] Elasticity enhancer: Uniformly dispersed in the substrate, utilizing the ultra-high resilience of spandex to improve the compressive strength of the composite felt. Under long-term pressure from the cover plate or repeated impacts from titanium alloy hollow spheres, it can quickly rebound to its initial shape, preventing the grooves from collapsing due to long-term pressure.

[0034] In summary, the first composite felt provided by this invention, through synergistic component design, can efficiently adsorb residual alcohol-water mixture on the surface of titanium alloy hollow spheres, meeting the rapid drying requirements of batch screening; it can also completely solve the fiber shedding problem through the covalent bonding between epoxy-silane modified glass microfibers and binders and the optimization of substrate ratio, avoiding adhesion to titanium alloy hollow spheres or contamination of screening solutions, ensuring a clean screening environment; at the same time, thanks to the high resilience of spandex microfibers and the supporting effect of flexible film, it achieves long-term resistance to compression collapse, and provides buffer protection for titanium alloy hollow spheres through the material's own elasticity, avoiding collision damage, perfectly adapting to the drying conditions in batch screening of titanium alloy hollow spheres.

[0035] As one possible implementation method of this application, the thickness of the first composite felt is 2-3 mm. In actual batch screening, if the composite felt is too thin, the amount of adsorption per batch is insufficient, requiring frequent replacement and increasing labor intensity; if it is too thick, the material flexibility decreases, which may scratch the titanium alloy hollow spheres, and it is not easy to dry and regenerate after adsorption.

[0036] As some possible implementations of this application, the bottom surface of the moisture-absorbing box is provided with a plurality of hemispherical first grooves, the diameter of the first grooves being 0.5-1mm larger than the diameter of the titanium alloy hollow spheres, and the shape of the first composite felt being adapted to the shape of the bottom surface of the moisture-absorbing box after the first grooves are provided.

[0037] During batch drying, if the bottom surface of the desiccant chamber is flat, the hollow titanium alloy spheres are prone to surface scratches due to shaking, stacking, and collisions. Furthermore, in this stacked state, some areas cannot contact the composite felt, creating drying dead zones (where residual liquid is not completely removed). By setting a first groove, each hollow titanium alloy sphere can be individually positioned, preventing collisions during shaking. The composite felt is adapted to the shape of the groove, increasing the contact area with the hollow titanium alloy spheres (changing from point contact to surface contact), ensuring that residual liquid is fully absorbed and solving the problem of uneven drying.

[0038] As some possible implementations of this application, a cover plate adapted to the moisture absorption box is also provided above the moisture absorption box. The side of the cover plate facing the moisture absorption box is provided with a hemispherical second groove that corresponds one-to-one with the first groove. The bottom wall of the cover plate is provided with a second composite felt adapted to its bottom wall structure.

[0039] During actual moisture absorption, when drying only through the first groove, the upper side of the titanium alloy hollow sphere has difficulty contacting the first composite felt, resulting in residual liquid on the upper surface not being absorbed. This residual liquid will still dilute the density of the high-density solution. Therefore, by setting a second groove, which forms an "enclosing" space with the first groove on the bottom, the titanium alloy hollow sphere rolls slightly within the groove when shaken, allowing its upper side to fully contact the second composite felt, achieving 360° drying without dead angles, thoroughly removing residual liquid, and avoiding interference with the high-density solution.

[0040] As some possible implementations of this application, after the moisture-absorbing box is closed, it is placed on a shaking device. The shaking device drives the receiving box to make horizontal reciprocating motion or inclined circular motion within 30°, so that the titanium alloy hollow ball rolls slightly in the space formed by the first groove and the second groove, making full contact with the composite felt and ensuring sufficient moisture absorption.

[0041] Compared with the prior art, the beneficial effects of the present invention are:

[0042] 1. This application utilizes the transparency of an alcohol solution (low toxicity, hazard level 8) to facilitate real-time observation of the floating and sinking status of hollow titanium alloy spheres, making the operation safe and intuitive. By using a standard ball to calibrate the solution density, the screening threshold can be stabilized, reducing human error and ensuring screening accuracy. The entire process eliminates the need for manual handling of each sphere individually; rapid sorting of large batches of hollow titanium alloy spheres can be achieved solely by observing their floating and sinking status in the solution. This effectively solves the problem of low screening efficiency in existing technologies, significantly reduces the labor intensity of operators, and is suitable for large-scale production needs. Furthermore, this method is specifically designed for screening hollow titanium alloy spheres and is not applicable to similar or other products.

[0043] 2. This application provides a first composite felt that can efficiently adsorb the residual alcohol-water mixture on the surface of titanium alloy hollow spheres, meeting the rapid drying requirements of batch screening; it can also completely solve the fiber shedding problem through the covalent bonding between epoxy-silane modified glass microfibers and binders and the optimization of the substrate ratio, avoiding adhesion to titanium alloy hollow spheres or contamination of the screening solution, and ensuring a clean screening environment; at the same time, thanks to the high resilience of spandex microfibers and the supporting effect of the flexible film, it achieves long-term resistance to compression collapse, and provides buffer protection for titanium alloy hollow spheres through the elasticity of the material itself, avoiding collision damage, perfectly adapting to the drying conditions in batch screening of titanium alloy hollow spheres. Attached Figure Description

[0044] Figure 1 Schematic diagram of the cross-sectional view of the desiccant chamber from the front view;

[0045] Figure 2 A cross-sectional view of the moisture-absorbing chamber after the first composite felt and cover plate are installed.

[0046] Figure 3 : Figure 1 A top-down structural diagram;

[0047] In the diagram, 1-moisture absorption box, 2-first composite felt, 3-first groove, 4-cover plate, 5-second composite felt. Detailed Implementation

[0048] Example 1

[0049] A method for screening titanium alloy products using alcohol solutions includes the following steps:

[0050] S1. Preparation of screening solution:

[0051] Low-density alcohol solution: Pour industrial alcohol into the first open container until the liquid level is 12 mm from the bottom of the container; then add a solution with a density of 0.88 g / cm³. 3 The first standard sphere was placed in the solution, and water was slowly added while stirring until the first standard sphere was suspended in the solution. Water addition was then stopped (at this point, the solution density was 0.88 g / cm³). 3 ).

[0052] High-density alcohol solution: Pour water into the second open container until the liquid level is 12 mm from the bottom; then add water with a density of 0.93 g / cm³. 3 The second standard sphere was placed in the solution, and industrial alcohol was slowly added while stirring until the second standard sphere was suspended in the solution. The addition of alcohol was then stopped (at this point, the solution density was 0.93 g / cm³). 3 ).

[0053] S2. First screening: Take 300 hollow titanium alloy spheres to be screened and evenly place them in a low-density alcohol solution, ensuring no aggregation (single sphere spacing ≥ 2 mm); after standing for 5 minutes, 91 hollow titanium alloy spheres were observed to float on the liquid surface (density < 0.88 g / cm³). 3 (Discarded), 209 particles sank to the bottom or remained suspended (density ≥ 0.88 g / cm³). 3 ).

[0054] S3. Second screening: 209 hollow titanium alloy spheres that sank to the bottom or remained suspended were scooped out using a scooping frame and directly transferred to a high-density alcohol solution (without accumulation); after standing for 5 minutes, 175 hollow titanium alloy spheres floated or remained suspended on the surface of the liquid (density ≤ 0.93 g / cm³). 3 (This is a qualified product), 34 pieces sank to the bottom (density > 0.93g / cm³). 3 (Remove).

[0055] Results: 175 qualified samples were selected. After sampling and weighing, the density of all samples was calculated to be between 0.88 and 0.93 g / cm³. 3 Within the range, the accuracy is 100%; the screening time for a single batch is 30 minutes, which is more efficient than weighing each particle individually (the traditional method takes at least 2 hours).

[0056] Example 2 (Introduction of a moisture-absorbing component)

[0057] Based on Example 1, a moisture absorption treatment is added to step S3, as follows:

[0058] Moisture-absorbing component structure (e.g.) Figure 1-3 As shown):

[0059] Moisture Absorption Box 1: 30cm long × 20cm wide × 10cm high, with 100 first grooves 3 on the inner bottom surface, the diameter of the grooves being 0.8mm larger than that of the titanium alloy hollow sphere.

[0060] First composite felt 2: It is set on the bottom surface of the moisture absorption box 1, with a thickness of 2mm. Its shape is adapted to the bottom surface of the moisture absorption box 1 (including the first groove 3). That is, the first composite felt 2 is provided with multiple grooves that fit the first groove 3, and the groove is hemispherical.

[0061] The first composite felt 2 is prepared according to the following method:

[0062] ① Take 62 parts of the substrate [PET microfiber (diameter 6μm) and PA6 microfiber (diameter 9μm)] and mix them at a mass ratio of 3:1; 28 parts of hydrophobic modified coconut shell activated carbon; 8 parts of epoxy silane modified glass microfiber; 3 parts of high-elasticity solvent-based polyurethane; and 0.8 parts of spandex microfiber (diameter 1.5μm). A molding die is then customized to perfectly match the inner bottom wall of the moisture-absorbing box 1.

[0063] The preparation method of hydrophobically modified coconut shell activated carbon is as follows:

[0064] Raw material pretreatment: Take coconut shell activated carbon with a particle size of 60μm, wash it three times with deionized water, and dry it at 105℃ for 2h to remove surface impurities and moisture. Then, add the dried activated carbon to a 5% (w / w) silicone oil (polydimethylsiloxane) ethanol solution (activated carbon to silicone oil mass ratio 1:5), stir it in a 60℃ constant temperature water bath for 2h, filter it, rinse it with anhydrous ethanol to remove unadsorbed silicone oil, and dry it at 80℃ for 3h to obtain hydrophobically modified coconut shell activated carbon (water contact angle 60-70°, alcohol contact angle 30-40°).

[0065] The preparation method of epoxy-silane modified glass microfibers is as follows:

[0066] Glass microfibers with a diameter of 4 μm and a length of 60 μm were soaked in a 10% hydrochloric acid solution for 1 hour, then rinsed with deionized water until neutral, and dried at 105°C for 1 hour. The dried glass microfibers were then added to a 2% epoxysilane (KH560) ethanol solution (fiber to solution mass ratio 1:10), the pH was adjusted to 4-5, and the solution was stirred at 50°C for 1 hour. The mixture was then filtered, and the fibers were cured in a 120°C oven for 2 hours to obtain epoxysilane-modified glass microfibers.

[0067] ② The substrate, epoxy silane modified glass microfiber, and spandex microfiber are laid flat on the surface of the mold. A fiber web with a thickness of 2.5mm is formed by airflow web formation process to ensure that the fiber web completely covers the raised and flat areas of the mold and that the fibers are evenly distributed in each area.

[0068] ③ A mixture of hydrophobic modified coconut shell activated carbon and high-elasticity solvent-based polyurethane (activated carbon to polyurethane mass ratio 9:1) is uniformly sprayed onto the surface of the fiber mesh using a spray adhesive process. After spraying, allow it to stand for 5 minutes to allow the adhesive to initially wet the fibers, ensuring that the activated carbon adheres firmly.

[0069] ④ Place the mold with the fiber web into a flat vulcanizing machine and mold it for 30 minutes at a pressure of 0.3 MPa and a temperature of 65°C. This allows the fiber web to form a shape that perfectly matches the bottom wall of the moisture absorption chamber 1 under the constraint of the mold. After molding, send the mold along with the mold into a 65°C oven for curing for 2 hours to allow the solvent-based polyurethane to fully crosslink and form a film structure that combines a specific shape with flexibility.

[0070] ⑤ After curing and cooling to room temperature, gently peel off the mold to obtain the first composite felt 2, which is consistent with the shape of the inner bottom wall of the moisture absorption box 1. Then, use a blade to trim the edge burrs to ensure that the edge of the composite felt fits seamlessly with the inner wall of the moisture absorption box 1.

[0071] The moisture-absorbing component also includes a cover plate 4: adapted to the moisture-absorbing box 1, with 100 second grooves on the bottom surface corresponding one-to-one with the first groove 3, and a second composite felt 5 laid in the grooves (with the same components and preparation method as the first composite felt 2).

[0072] Working principle of the moisture absorption component: After the titanium alloy hollow balls are taken out from S3, they are pushed one by one into the first groove 3 of the moisture absorption box 1 (1 ball per groove), the cover plate 4 is closed, and the box is placed on a shaking device to make a 30° inclined circular motion (speed 30 times / min) for 1 minute; then the cover plate 4 is opened and the titanium alloy hollow balls are transferred to the high-density alcohol solution. The remaining steps are the same as in Example 1.

[0073] Example 3 (Adjusting the thickness of the composite felt)

[0074] Based on Example 2, only the thickness of the first composite felt 2 is adjusted to 3mm, while the rest of the structure and steps remain unchanged.

[0075] Comparative Example 1 (lacking elastic reinforcing agent)

[0076] Based on Example 2, 0.8 parts of spandex microfiber were removed from the first composite felt 2, while the remaining components and steps remained unchanged.

[0077] Comparative Example 2 (unmodified glass microfibers)

[0078] Based on Example 2, the "epoxysilane modified glass microfiber" was replaced with "unmodified glass microfiber", while the other components and steps remained unchanged.

[0079] Experimental Example

[0080] Using the first composite felt 2 in Examples 2, 3 and Comparative Examples 1 and 2 as test samples, the performance was verified, including adsorption capacity, residual liquid adsorption effect, anti-collapse, anti-fiber shedding and the effect on screening solution.

[0081] The testing method is as follows:

[0082] 1. Adsorption capacity test.

[0083] ① Take each sample (cut into 5cm×5cm pieces, weigh and record as m0), immerse it completely in the test solution (low-density alcohol solution in Example 1), and let it stand until adsorption saturation (weight no longer increases);

[0084] ② Take out the sample, let it drip naturally for 10 seconds, and then weigh it (record as m1);

[0085] ③Adsorption capacity = (m1-m0) / m0×100%, and the average value is taken for each group after 3 tests.

[0086] 2. Residual liquid adsorption effect test.

[0087] ① Take a hollow titanium alloy sphere (8mm in diameter, with 0.1g of the low-density alcohol solution from Example 1 evenly coated on the surface, and weigh it as m_sphere0);

[0088] ② Place the hollow titanium alloy sphere into the corresponding sample groove, close the cover plate, place it on the shaking device and make a 30° inclined circular motion (30 times / min) for 1 minute;

[0089] ③ Take out the hollow titanium alloy sphere, weigh it and record the weight as m sphere 1, the residual liquid volume = m sphere 1 - m sphere 0;

[0090] ④ Test 50 hollow titanium alloy spheres in each group and calculate the average residual liquid volume.

[0091] 3. Collapse resistance test.

[0092] ① Take each sample and fix it according to the groove structure of the moisture absorption box. Simulate the cover pressure (0.2MPa) + shaking friction (30 times / min, 30° inclined circular motion). Set the number of cycles to 500 times (Examples 2 and 3) or 100 times (Comparative Example 1).

[0093] ② After the cycle, measure the depth of the sample groove and calculate the amount of depth reduction;

[0094] ③ Observe whether the groove shape is complete (whether there is any collapse or deformation).

[0095] 4. Resistance to fiber shedding test.

[0096] ① Take each sample, fix it on the friction instrument, and rub it back and forth in the groove with a hollow titanium alloy ball (8mm in diameter) (speed 30 times / min) for a total of 50 times.

[0097] ② Collect the detached fibers from the sample surface and the titanium alloy hollow sphere surface after friction, and weigh them using an electronic balance (accuracy 0.0001g);

[0098] ③ Observe whether the fibers adhere to the surface of the titanium alloy hollow sphere.

[0099] 5. Test on the effect on the screening solution.

[0100] Test solution: High-density alcohol solution (density 0.93 g / cm³) 3 (Consistent with the screening conditions).

[0101] method:

[0102] ① Place 100 hollow titanium alloy spheres (in total) after the residual liquid adsorption test into 200mL of high-density solution and let stand for 5min;

[0103] ② Measure the density of the solution (using a hydrometer, accuracy 0.001 g / cm³). 3) and transmittance (using a spectrophotometer, 600nm wavelength);

[0104] ③ Observe whether the solution is turbid and record whether there is any misjudgment of the floating or sinking state of the titanium alloy hollow spheres (compared with the standard spheres).

[0105] The experimental results are shown in Table 1.

[0106] Table 1:

[0107]

[0108] As can be seen from Table 1:

[0109] Example 2: The composite felt has an adsorption capacity of 35g / 100g, complete adsorption of residual liquid, no collapse after 500 uses, extremely low fiber shedding, no interference with high-density solutions, and meets the requirements for batch screening.

[0110] Example 3: After increasing the thickness to 3mm, the adsorption capacity increased to 38g / 100g, with better overall performance, and is suitable for higher frequency screening conditions.

[0111] Comparative Example 1: The lack of spandex microfibers led to a significant decrease in anti-collapse properties. After 100 uses, the groove collapsed, the residual liquid was not completely adsorbed, the density of the high-density solution shifted, and a 10% misjudgment occurred, which verified the key role of the elasticity enhancer in structural stability.

[0112] Comparative Example 2: Unmodified glass microfibers led to a surge in fiber shedding, contaminating the solution and interfering with the determination of float and sink, with a misjudgment rate of 3%, verifying the necessity of epoxy silane modification to inhibit fiber shedding.

Claims

1. A method for screening titanium alloy products using alcohol solutions, characterized in that, Includes the following steps: S1. Preparation of screening solution: Preparation of low-density alcohol solution: Pour industrial alcohol into the first open container, then add a solution with a density of 0.88 g / cm³. 3 Place the first standard ball into the solution, add water and stir until the first standard ball is suspended in the solution, then stop adding water. Preparation of high-density alcohol solution: Pour water into a second open container, then add water with a density of 0.93 g / cm³. 3 The second standard ball is placed in it, then industrial alcohol is added and stirred evenly until the second standard ball is suspended in the solution, then the addition of industrial alcohol is stopped; S2. First screening: Place the hollow titanium alloy spheres to be screened into the low-density alcohol solution, ensuring that no accumulation occurs during placement; S3. Second screening: First, remove the hollow titanium alloy balls floating on the surface of the low-density alcohol solution. Then, remove the hollow titanium alloy balls that sink or are suspended and place them into the high-density alcohol solution. The hollow titanium alloy balls that float or are suspended in the high-density alcohol solution are the qualified products selected.

2. The method for screening titanium alloy products using alcohol solution according to claim 1, characterized in that, In step S1, after industrial alcohol is poured into the first open container, the liquid level is 10-15 mm from the bottom of the container; after water is poured into the second open container, the liquid level is 10-15 mm from the bottom of the container.

3. The method for screening titanium alloy products using alcohol solution according to claim 1, characterized in that, After the titanium alloy hollow spheres that have sunk to the bottom or are suspended are retrieved in step S3, they are first placed on a drying assembly to absorb the remaining low-density solution, and then transferred to a high-density solution.

4. The method for screening titanium alloy products using alcohol solution according to claim 1, characterized in that, In step S1, After each screening, the solution density is checked using the corresponding standard sphere. If the floating or sinking state of the standard sphere changes, it is adjusted to the standard state by adding water or alcohol in a timely manner.

5. The method for screening titanium alloy products using alcohol solution according to claim 3, characterized in that, The drying assembly includes a moisture-absorbing box (1) with a top opening, and a water-absorbing material disposed on the bottom surface of the moisture-absorbing box (1). The water-absorbing material includes a first composite felt (2) disposed on the bottom surface of the moisture-absorbing box (1). The first composite felt (2) comprises the following components in parts by weight: 60-65 parts of the base material: composed of a blend of polyester and nylon fibers; 25-30 parts adsorbent: hydrophobically modified coconut shell activated carbon; 6-10 parts reinforcing agent: epoxy silane modified glass microfiber; 3-4 parts adhesive: high-elasticity solvent-based polyurethane; 0.5-1 part elastic reinforcing agent: spandex fiber.

6. The method for screening titanium alloy products using alcohol solution according to claim 5, characterized in that, The thickness of the first composite felt (2) is 2-3 mm.

7. The method for screening titanium alloy products using alcohol solution according to claim 6, characterized in that, The bottom surface of the moisture-absorbing box (1) is provided with a plurality of first grooves (3). The diameter of the first groove (3) is 0.5-1mm larger than the diameter of the titanium alloy hollow sphere. The shape of the first composite felt (2) is adapted to the shape of the bottom surface of the moisture-absorbing box (1) after the first grooves (3) are provided.

8. The method for screening titanium alloy products using alcohol solution according to claim 7, characterized in that, The moisture-absorbing box (1) is also provided with a cover plate (4) adapted to it. The side of the cover plate (4) facing the moisture-absorbing box (1) is provided with a second groove corresponding to the first groove (3). The bottom wall of the cover plate (4) is provided with a second composite felt (5) adapted to its bottom wall structure.

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