Ultrasonic-assisted device for manufacturing high-performance coating and use method of ultrasonic-assisted device

Abstract

The invention discloses an ultrasonic-assisted device for manufacturing a high-performance coating and a using method of the ultrasonic-assisted device, and relates to an auxiliary device for manufacturing a coating and a using method of the auxiliary device. The invention aims to solve the technical problem that a coating with low porosity, high bonding strength and good wear resistance is difficult to prepare by the current spraying technology. Through the design of the four-head reinforced vibration base, the ultrasonic vibration is increased, the uniformity of the ultrasonic vibration is improved, the porosity of a coating can be reduced, a crystal structure is promoted to be refined, the hardness is increased, the bonding strength and the wear resistance of the coating are enhanced, the whole-process construction of spraying particles is reinforced, and the coating quality is improved. And ultrasonic enhanced spraying is achieved, and then the high-performance surface coating is prepared. According to the device and the method, the durability of a product is improved, and the service life of equipment is prolonged. In addition, by applying the technology, the production cost can be reduced, and the production efficiency can be improved.

Description

Technical Field

[0001] The invention relates to an auxiliary device for coating manufacturing and a method for using the same. Background Art

[0002] Traditional spraying technology (cold / hot spraying) is often difficult to prepare high-performance coatings with low porosity, high bonding strength and good wear resistance due to the inherent limitations of coating materials. In particular, because of the spreading and deposition behavior of particles during the spraying process, it is very easy to cause particles to adhere to the internal pores and difficult to escape. At the same time, due to the sudden cooling of the coating, it causes local residual stress concentration, uncontrollable crystal structure and other defects. Ultrasound is a sound wave with a frequency higher than the upper limit of human hearing. It has the characteristics of good directionality, strong penetration and concentrated energy. Ultrasound can effectively refine grains, uniform organization and inhibit defect generation through its cavitation effect, acoustic streaming effect and mechanical effect, thereby solving the inherent problems of the coating itself and improving the coating performance. Summary of the invention

[0003] The present invention aims to solve the technical problem that it is difficult to prepare a coating with low porosity, high bonding strength and good wear resistance using current spraying technology, and to provide an ultrasonic auxiliary device for high-performance coating manufacturing and a method of using the device.

[0004] The ultrasonic auxiliary device for manufacturing high-performance coatings of the present invention is composed of a four-head reinforced vibration base 1, a tool head 2, a horn 3 and a transducer 4;

[0005] The four-head enhanced vibration base 1 is a symmetrical structure in the horizontal and vertical directions, the middle part is a rectangular structure, the size of the horizontal plane from the middle part to the upper and lower ends gradually decreases, and the upper and lower surfaces are both flat as a working platform 1-1, and a plurality of threaded holes 1-2 are evenly arranged on the working platform 1-1; a threaded hole is arranged at the center of each of the four side walls of the middle part of the four-head enhanced vibration base 1, which is threadedly connected to one end of the four tool heads 2 respectively, the central axes of the two opposite tool heads 2 coincide, and the two adjacent tool heads 2 are perpendicular to each other; the other end of the tool head 2 is threadedly connected to the amplitude rod 3, and the other end of the amplitude rod 3 is threadedly connected to the transducer 4.

[0006] The method of using the ultrasonic auxiliary device for high-performance coating manufacturing of the present invention is:

[0007] 1. Place the pre-treated plate 5 to be sprayed on the working platform 1-1, and fix the plate 5 to the working platform 1-1 through screws and threaded holes 1-2;

[0008] 2. The free end of the transducer 4 is connected to an ultrasonic generator, which is started, and the surface of the plate 5 is sprayed to prepare a coating.

[0009] The design principle of the present invention is as follows:

[0010] The free end of the transducer 4 is connected to the ultrasonic generator. When the ultrasonic generator is started, the ultrasonic vibration generated by the transducer 4 will be transmitted to the amplitude transformer 3. The amplitude transformer 3 will increase the ultrasonic vibration for the first time and transmit it to the tool head 2. The tool head 2 is connected to the four-head enhanced vibration base 1. The tool head 2 will increase the ultrasonic vibration for the second time. The waveform emitted by the tool head 2 is a longitudinal wave. At the same time, the longitudinal wave emitted by another tool head 2 opposite to it overlaps in the four-head enhanced vibration base 1, thereby increasing the intensity of the longitudinal wave; similarly, the longitudinal waves emitted by the other two opposite tool heads 2 overlap again in the four-head enhanced vibration base 1, and the four overlaps once again increase the intensity of the longitudinal wave and increase the ultrasonic vibration three times. The four-head enhanced vibration base 1 gradually narrows at the upper and lower ends and finally forms a working platform 1-1. Through this gradually narrowing structure, the sound waves will converge to the working platform 1-1, increasing the ultrasonic vibration four times, thereby applying the ultrasonic vibration to the plate 5; the spraying process is controlled to prepare the coating, and the ultrasonic generator is turned off after the spraying is completed, thereby realizing the preparation of the ultrasonic-assisted spray coating.

[0011] The materials of the amplitude transformer 3 and the four-end reinforced vibration base 1 are both titanium alloy, which can effectively transmit ultrasonic vibration and reduce the loss of ultrasonic transmission. At the same time, the four-end reinforced vibration base 1 adjusts the ultrasonic amplitude to the upper and lower working platforms 1-1 to reduce the ultrasonic impact effect; the ultrasonic energy is concentrated on the working platform 1-1, and there is no four-end impact; the amplitude of the working platform 1-1 can be changed by adjusting the power of the ultrasonic generator.

[0012] The present invention increases ultrasonic vibration and improves the uniformity of ultrasonic vibration through the design of the four-head reinforced vibration base 1; the ultrasonic wave will first act on the plastic forming process of the sprayed particles by high-frequency vibration, which is helpful to evenly distribute the particles, reduce agglomeration, improve the uniformity of spraying, and significantly reduce the porosity of the coating; at the same time, when the particles adhere to the substrate, the ultrasonic action will further disperse the interface bonding state, so that the particle wetting angle changes and the coating bonding strength is improved; finally, the nano-bubble bombardment generated by the ultrasonic cavitation phenomenon and the internal phase directional regulation generated by the ultrasonic acoustic streaming effect will further change the internal crystal structure of the coating, provide crystal nucleation work, and then refine the grains, and increase the hardness and wear resistance of the coating. The device and method of the present invention not only improve the durability of the product, but also extend the service life of the equipment by setting up two upper and lower working platforms 1-1. In addition, the application of this technology can also reduce production costs and improve production efficiency.

[0013] The present invention also has the following advantages:

[0014] 1. The method of the present invention is simple and effective, and the device is simple. It only needs to fix the plate to be sprayed on the working platform 1-1, and ultrasonically treat the plate during spraying to obtain a coating with a good effect, without the need for additional fixtures;

[0015] 2. The four-head reinforced vibration base 1 adopts four tool heads and transmits most of the vibration to the working platform, ensuring the uniformity of ultrasonic vibration at all parts of the plate and improving the vibration intensity of the ultrasonic wave;

[0016] 3. The four-head reinforced vibration base 1 gradually narrows upward and finally forms a working platform 1-1. The gradually narrowing structure improves the intensity of vibration, and finally has a significant effect on strengthening the coating;

[0017] 4. The present invention is applicable to plates of various shapes and is not limited by the shape of the plates. A plurality of threaded holes 1-2 are evenly arranged on the working platform 1-1, and the plates only need to be fixed to the working platform 1-1;

[0018] 5. The four-head reinforced vibration base 1 of the present invention is a vertically symmetrical structure, and both sides can be used as working platforms, which increases the service life of the device;

[0019] 6. The present invention has a wide range of uses and can be applied to the optimization of surface properties of thermal spraying and cold spraying;

[0020] 7. Improved coating quality reduces subsequent processing steps, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of an ultrasonic-assisted device for manufacturing high-performance coatings according to a first specific embodiment;

[0022] Figure 2 It is a front view schematic diagram of an ultrasonic assisted device for manufacturing high-performance coatings according to a specific embodiment 1;

[0023] Figure 3 A schematic top view of an ultrasonic-assisted device for manufacturing high-performance coatings according to a first specific embodiment;

[0024] Figure 4 The average porosity results of the coatings in test 1 and the comparative test;

[0025] Figure 5 This is a comparison chart of the friction coefficient curves of the test 1 and the comparative test coating. DETAILED DESCRIPTION

[0026] Specific implementation method 1: This implementation method is an ultrasonic auxiliary device for high-performance coating manufacturing, such as Figure 1-Figure 3As shown, it is specifically composed of a four-head reinforced vibration base 1, a tool head 2, a horn 3 and a transducer 4;

[0027] The four-head enhanced vibration base 1 is a symmetrical structure in the horizontal and vertical directions, the middle part is a rectangular structure, the size of the horizontal plane from the middle part to the upper and lower ends gradually decreases, and the upper and lower surfaces are both flat as a working platform 1-1, and a plurality of threaded holes 1-2 are evenly arranged on the working platform 1-1; a threaded hole is arranged at the center of each of the four side walls of the middle part of the four-head enhanced vibration base 1, which is threadedly connected to one end of the four tool heads 2 respectively, the central axes of the two opposite tool heads 2 coincide, and the two adjacent tool heads 2 are perpendicular to each other; the other end of the tool head 2 is threadedly connected to the amplitude rod 3, and the other end of the amplitude rod 3 is threadedly connected to the transducer 4.

[0028] Specific embodiment 2: This embodiment is different from the specific embodiment 1 in that the material of the four-head reinforced vibration base 1 and the horn 3 are both Ti alloy. The rest is the same as the specific embodiment 1.

[0029] Specific implementation method 3: This implementation method is different from the specific implementation method 2 in that the four-head reinforced vibration base 1 is a solid structure. The rest is the same as the specific implementation method 2.

[0030] Specific implementation method 4: This implementation method is a method for using the ultrasonic auxiliary device for high-performance coating manufacturing in the specific implementation method 1, and the specific steps are as follows:

[0031] 1. Place the pre-treated plate 5 to be sprayed on the working platform 1-1, and fix the plate 5 to the working platform 1-1 through screws and threaded holes 1-2;

[0032] 2. The free end of the transducer 4 is connected to an ultrasonic generator, which is started, and the surface of the plate 5 is sprayed to prepare a coating.

[0033] Specific implementation method 5: This implementation method is different from specific implementation method 4 in that the pretreatment method described in step 1 is: firstly, the surface of the plate is roughly ground with sandpaper, then wiped with alcohol, and then ultrasonic vibration cleaning is used to remove oil and impurities on the surface of the plate, and then blow-dried with a hair dryer. The rest is the same as specific implementation method 4.

[0034] The present invention is verified by the following tests:

[0035] Test 1: This test is an ultrasonic assisted device for high performance coating manufacturing, such as Figure 1-Figure 3 As shown, it is specifically composed of a four-head reinforced vibration base 1, a tool head 2, a horn 3 and a transducer 4;

[0036] The four-head enhanced vibration base 1 is a symmetrical structure in both horizontal and vertical directions, the middle part is a rectangular parallelepiped structure, the size of the horizontal plane from the middle part to the upper and lower ends gradually decreases, and the upper and lower surfaces are both planes as a working platform 1-1, and a plurality of threaded holes 1-2 are evenly arranged on the working platform 1-1; a threaded hole is arranged at the center of each of the four side walls of the middle part of the four-head enhanced vibration base 1, which is threadedly connected to one end of the four tool heads 2 respectively, the central axes of the two opposite tool heads 2 coincide, and the two adjacent tool heads 2 are perpendicular to each other; the other end of the tool head 2 is threadedly connected to the amplitude rod 3, and the other end of the amplitude rod 3 is threadedly connected to the transducer 4;

[0037] The materials of the four-head reinforced vibration base 1 and the horn 3 are both Ti alloy; the four-head reinforced vibration base 1 is a solid structure.

[0038] The method of using the ultrasonic assisted device for high performance coating manufacturing is as follows:

[0039] 1. Use Al plates with a size of 80×80mm for spraying. Pre-treat the plates before spraying. First, grind the plate surface with sandpaper. After grinding, wipe with alcohol and then use ultrasonic cleaning to remove oil and impurities on the plate surface. Then use a hair dryer to dry it.

[0040] 2. Place the pre-treated plate 5 to be sprayed on the working platform 1-1, and fix the plate 5 to the working platform 1-1 through screws and threaded holes 1-2;

[0041] 3. The free end of the transducer 4 is connected to an ultrasonic generator, which is started to apply ultrasonic vibration to the surface of the plate 5 to prepare a coating. The ultrasonic amplitude is 25 μm, the power is 3000 W, and the frequency is fixed at 20 KHz. At the same time, the surface of the plate 5 is cold-sprayed with Ni powder to prepare the coating. The auxiliary gas used in the cold spraying is argon gas, the gas pressure is 3 MPa, the preheating temperature of the Ni powder is 550 ° C, the stirring speed is 5 rpm, the powder feeding rate of the Ni powder is 61 g / min, the moving speed of the spray gun is 100 mm / s, the spraying distance is 30 mm, and the spray gun sprays powder particles according to the set path to hit the surface of the sample, and a coating is formed through plastic deformation. After spraying, the ultrasonic generator is turned off.

[0042] Comparative test: This test differs from the first test in that no ultrasound is used during spraying, and the rest is the same as the first test.

[0043] Figure 4The average porosity results of the coatings in test 1 and the comparative test are shown in Figure 1. The test results are mainly based on cross-sectional SEM capture for porosity statistics. The steps are to cut the spray coating sample, polish it to a mirror surface, take photos at the same magnification under the SEM electron microscope, and use Image Pro software to perform coating porosity statistics. It can be seen from the figure that the porosity of the coating without ultrasonic treatment in the comparative test is 2.1%, while the porosity of the coating after ultrasonic treatment in test 1 is 0.88%, and the porosity is significantly reduced.

[0044] Figure 5 The friction coefficient curves of the coatings in test 1 and the comparative test are compared. The dotted line represents the ultrasonic treatment of test 1, and the solid line represents the result of the comparative test without ultrasonic treatment. The tribological test was carried out on a standard friction and wear test equipment (model: MPT-3G). The pin-disc friction pair was loaded on the equivalent plane part of the joint bearing. The bearing was fixed, and the pin-disc was the friction pair rotating. The tribological performance of the equivalent plane part of the bearing was tested. It can be seen from the figure that the average friction coefficient of the ultrasonically treated coating in test 1 is 0.295, and the average friction coefficient of the Ni-based coating without ultrasonic treatment in the comparative test is 0.379. After comparison, it was found that the friction coefficient of the coating was significantly reduced after ultrasonic treatment, and the wear resistance was greatly improved.

Claims

1. An ultrasonic assisted device for high performance coating manufacturing, characterized in that The ultrasonic auxiliary device for manufacturing high-performance coatings is composed of a four-head reinforced vibration base 1, a tool head 2, a horn 3 and a transducer 4; The four-head enhanced vibration base 1 is a symmetrical structure in the horizontal and vertical directions, the middle part is a rectangular structure, the size of the horizontal plane from the middle part to the upper and lower ends gradually decreases, and the upper and lower surfaces are both flat as a working platform 1-1, and a plurality of threaded holes 1-2 are evenly arranged on the working platform 1-1; a threaded hole is arranged at the center of each of the four side walls of the middle part of the four-head enhanced vibration base 1, which is threadedly connected to one end of the four tool heads 2 respectively, the central axes of the two opposite tool heads 2 coincide, and the two adjacent tool heads 2 are perpendicular to each other; the other end of the tool head 2 is threadedly connected to the amplitude rod 3, and the other end of the amplitude rod 3 is threadedly connected to the transducer 4.

2. An ultrasonic assisted device for high performance coating manufacturing according to claim 1, characterized in that The four-head reinforced vibration base 1 and the horn 3 are both made of Ti alloy.

3. An ultrasonic assisted device for high performance coating manufacturing according to claim 2, characterized in that The four-head reinforced vibration base 1 is a solid structure.

4. A method for using an ultrasonic assisted device for high performance coating manufacturing as claimed in claim 1, characterized in that The method of using the ultrasonic auxiliary device for high performance coating manufacturing is as follows:

1. Place the pre-treated plate 5 to be sprayed on the working platform 1-1, and fix the plate 5 to the working platform 1-1 through screws and threaded holes 1-2; 2. The free end of the transducer 4 is connected to an ultrasonic generator, which is started, and the surface of the plate 5 is sprayed to prepare a coating.

5. The method for using an ultrasonic assisted device for manufacturing high-performance coatings according to claim 4, characterized in that The pretreatment method described in step 1 is: firstly, the surface of the plate is roughly ground with sandpaper, then wiped with alcohol after the rough grinding, and then the oil and impurities on the surface of the plate are removed by ultrasonic vibration cleaning, and then blow-dried with a hair dryer.

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