CN215544927U - 3D prints with preparation facilities that contains vanadium titanium alloy powder - Google Patents
3D prints with preparation facilities that contains vanadium titanium alloy powder Download PDFInfo
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- CN215544927U CN215544927U CN202121894785.3U CN202121894785U CN215544927U CN 215544927 U CN215544927 U CN 215544927U CN 202121894785 U CN202121894785 U CN 202121894785U CN 215544927 U CN215544927 U CN 215544927U
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Abstract
The utility model relates to a preparation device of vanadium-titanium-containing alloy powder for 3D printing, which comprises an atomizing spray disk, an atomizing spray disk fixing plate, a positive vanadium-titanium-containing alloy electrode and a negative vanadium-titanium-containing alloy electrode, wherein the positive vanadium-titanium-containing alloy electrode and the negative vanadium-titanium-containing alloy electrode are contacted with the outlet end of a conveying feed hole to form a melting center, atomizing air flow sprayed out from a main atomizing air flow nozzle is converged to form an atomizing center, the atomizing center is superposed with the melting center and forms a conical liquid drop spraying area, the atomizing spray disk is also provided with an annular auxiliary atomizing rotational flow nozzle and an annular seam nozzle and can form jet flow tangential to the melting center nozzle, and jet flow paths formed by the annular seam nozzles are spirally arranged along the conical liquid drop spraying area formed by the atomizing center. The utility model has the advantages of modular assembly and simple structure, ensures that the formed vanadium-containing titanium alloy powder has good sphericity, higher fine powder yield and narrower particle size distribution, and is also beneficial to reducing the production cost.
Description
Technical Field
The utility model relates to a preparation device of vanadium-titanium-containing alloy powder for 3D printing, and belongs to the technical field of powder metallurgy.
Background
In recent years, with the rapid development of the processing and manufacturing industry, the traditional processing mode can not meet the requirements of the industry which tends to be more precise in manufacturing. The TC4 titanium alloy has excellent comprehensive performance and is used more and more highly in the industry, but the traditional processing mode is difficult to process the TC4 titanium alloy, and a large amount of waste is caused by a material reduction processing mode, so that the development of the TC4 titanium alloy is limited, and a new technology which is different from the traditional processing mode is needed.
The problem troubling people for decades is solved by the appearance of the laser additive manufacturing technology, the laser additive manufacturing technology is used as an advanced production mode and is combined with the TC4 titanium alloy, so that the processing and production of the TC4 titanium alloy become simple, the processing efficiency and the processing precision are greatly improved, and the processing of complex and precise parts can be realized. Although the TC4 titanium alloy is used as an important weight-reducing material due to excellent performance, and the mechanical property of a TC4 titanium alloy formed part prepared by the laser additive manufacturing technology basically meets the forging standard, the TC4 titanium alloy formed part does not meet the requirement of higher strength in the current aerospace field. Although the mechanical properties can be enhanced by heat treatment for strength improvement, the method is only suitable for producing small parts, and the secondary processing step is more complicated. At present, structural design integration in the aerospace field is an important research direction, and the produced parts have large volumes, so that the problem of subsequent heat treatment is caused.
In order to solve the problem and avoid introducing new alloy elements, the comprehensive performance of the alloy can be improved by changing the mass fraction of the V element in TC 4. The method for improving the strength by alloying is just fit with the laser additive manufacturing technology which uses metal powder as raw material to process and manufacture. The laser additive manufacturing (3D printing) technology requires that the powder has technical indexes such as high sphericity, narrow particle size distribution, low oxygen content, good fluidity, and the like.
At present, the preparation method of spherical titanium or titanium alloy powder for 3D printing mainly comprises a plasma torch atomization method, an electrode induction melting gas atomization method, a plasma rotating electrode method, a high-frequency induction melting metal wire, an arc fuse method and the like. Patent CN104475744A discloses a technique for preparing spherical titanium or titanium alloy powder by high-frequency induction melting wire gas atomization method, which has poor atomization effect, powder particle size of 30-100 μm, and low fine powder yield. Patent CN107282936A discloses a technique for preparing metal powder by an arc fuse method, wherein the particle size distribution of the metal powder prepared by atomization is not concentrated (5-300 μm), and the production efficiency is low. Meanwhile, in order to obtain metal powder with finer granularity, high pressure and large flow of the jet gas need to be ensured, and when the titanium alloy powder is prepared, the consumption of the inert gas is extremely high, the inert gas cannot be recycled, the production cost is high, and the method is not beneficial to industrial application and popularization.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model aims to provide the preparation device of the vanadium-containing titanium alloy powder for 3D printing, so that the formed vanadium-containing titanium alloy powder has good sphericity, finer granularity, high powder preparation efficiency and greatly reduced production cost.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:
the utility model provides a preparation device of vanadium-titanium-containing alloy powder for 3D printing, which comprises an atomizing spray disk, an atomizing spray disk fixing plate, a positive vanadium-titanium-containing alloy electrode and a negative vanadium-titanium-containing alloy electrode, wherein the atomizing spray disk fixing plate is provided with a conveying feed hole for conveying the anode vanadium-titanium-containing alloy electrode and the cathode vanadium-titanium-containing alloy electrode, and the positive electrode vanadium-titanium alloy electrode and the negative electrode vanadium-titanium alloy electrode are contacted at the outlet end of the conveying feed hole to form a melting center, the atomizing spray disk is provided with a main atomizing airflow nozzle and an auxiliary protective airflow nozzle, the atomizing airflow sprayed out by the main atomizing airflow nozzle is converged at the outlet end of the conveying feed hole to form an atomizing center, the atomizing center is superposed with the melting center to form a conical liquid drop spraying area, and an annular auxiliary atomizing swirl nozzle is arranged between the main atomizing airflow nozzle and the auxiliary protective airflow nozzle on the atomizing spray disk;
the atomization spray disk fixing plate is tightly assembled below the atomization nozzle, and the atomization spray disk fixing plate is correspondingly provided with a main atomization airflow path hole and an auxiliary protection airflow path hole along the jet flow direction of the main atomization airflow nozzle and the auxiliary protection airflow nozzle;
the atomization spray disk fixing plate is further provided with at least two circular seam nozzles, the auxiliary atomization rotational flow nozzle is arranged at the outlet end of the conveying and feeding hole, the circular seam nozzles form jet flow of a tangential melting central nozzle, and a jet flow path formed by each circular seam nozzle is spirally arranged along a conical liquid drop spraying area formed by an atomization center.
As a preferred scheme of the present invention, the atomizing spray disk fixing plate includes, from outside to inside, an annular spray disk base plate, a main atomizing airflow insert, a conical auxiliary insert, an auxiliary shielding airflow insert, and a conveying feed hole insert, wherein:
the annular spraying disc base plate is provided with an inverted conical inner side surface, and the main atomizing airflow insert is embedded in the annular spraying disc base plate and forms a main atomizing airflow path hole corresponding to the main atomizing airflow nozzle together with the annular spraying disc base plate;
the main atomizing airflow insert is provided with an inverted conical inner side surface, the conical auxiliary insert is assembled in the main atomizing airflow insert through a first bearing, a conical gap corresponding to the auxiliary atomizing rotational flow nozzle is reserved between the conical auxiliary insert and the main atomizing airflow insert, and the conical gap is divided into uniform circular seam nozzles by spiral bosses uniformly distributed on the outer side of the conical auxiliary insert;
the inner side of the conical auxiliary insert is provided with an inverted conical inner side surface, the conical auxiliary insert is assembled with the auxiliary protection airflow insert through a second bearing, the conveying feeding hole insert is embedded in the inner side of the auxiliary protection airflow insert, and the conveying feeding hole insert and the auxiliary protection airflow insert form an auxiliary protection airflow path hole corresponding to an auxiliary protection airflow nozzle together.
In a preferred embodiment of the present invention, the apertures of the main atomizing airflow path aperture, the auxiliary shielding airflow path aperture and the circular seam nozzle are all arranged in a gradually narrowing manner.
Furthermore, it should be noted that the outer side surface of the conical auxiliary insert has different tapers corresponding to different circular seam nozzles, so that the jet paths formed by the circular seam nozzles uniformly distributed along the conical gap are spirally distributed tangential to the conical liquid drop spraying area.
As a preferred scheme of the present invention, the main atomizing airflow insert and the annular spray disk substrate are fixed by being engaged with each other through an outer convex limiting table, the conveying feed hole insert is fixed at the central hole of the atomizing spray disk through a limiting block in a keyway structure, and the auxiliary shielding airflow insert is fixed by being engaged with the conveying feed hole insert through an inner concave limiting table.
As a preferable scheme of the utility model, the annular spray plate base plate is arranged at the bottom of the atomizing spray plate through locking bolts at the periphery of the annular spray plate base plate.
In addition, the atomizing gas sprayed by the atomizing spray disk from the main atomizing airflow nozzle, the auxiliary protective airflow nozzle and the annular auxiliary atomizing rotational flow nozzle is inert gas such as argon or helium.
The utility model has the beneficial effects that:
firstly, the jet flow path formed by the circular seam nozzles is spirally arranged along the conical liquid drop spraying area formed by the atomizing center, so that the high-pressure gas jetted by the circular seam nozzles can enable the liquid drops to generate strong three-dimensional strong rotary shearing turbulence, meanwhile, the relative speed difference between the gas flow and the liquid drops is increased to increase the aerodynamic force, the liquid drops are broken more thinly under the larger aerodynamic force, meanwhile, the circular seam nozzles generate high-speed rotation under the impact of the auxiliary atomizing rotational flow nozzles on the spiral boss, so that the circular seam nozzles synchronously rotate, the rotational flow impact effect of the circular seam nozzle jet flow is further enhanced, and compared with the common high-pressure direct injection in the prior art, the pressure of the main atomizing gas flow nozzles and the use amount of inert gas are reduced.
Secondly, the liquid drops are thrown out along with aerodynamic force and centrifugal force to form a spiral type liquid drop atomization area, when the liquid drops leave a melting center, the liquid drops are split into smaller liquid drops when the aerodynamic force and the centrifugal force are larger than surface tension, the smaller liquid drops are pulled into a plurality of filamentous jet flows and are separated into smaller liquid drops under the friction action of inert gas, the liquid filaments are connected into a thinner liquid film state along with outward expansion, and the thinner liquid droplets are further split into fine liquid drops under the action of the inert gas sprayed by the high-speed rotation of the circular seam nozzle.
More importantly, when the vanadium-titanium alloy wire electrode of the anode and the vanadium-titanium alloy wire electrode of the cathode are thermally fused by electric arcs generated by contact short circuit of the vanadium-titanium alloy electrode of the anode and the vanadium-titanium alloy electrode of the cathode, atomizing gas sprayed by a main atomizing airflow nozzle, an auxiliary protective airflow nozzle and an annular auxiliary atomizing cyclone nozzle of an atomizing spray disk is opened for atomization, the short circuit electric arcs can instantly generate huge heat, the temperature is up to 3000k, the generated powder can be rapidly solidified into balls in the inert gas atomizing and solidifying process, and meanwhile, the vanadium-titanium alloy powder has better sphericity and fine powder yield due to high-speed rotating centrifugal force generated in the atomizing process.
Drawings
FIG. 1 is a schematic structural diagram of a device for preparing vanadium-titanium-containing alloy powder in embodiment 1 of the present invention.
FIG. 2 is a plan view of a structure of an apparatus for producing the vanadium-titanium-containing alloy powder in example 1 of the present invention.
The device comprises an atomizing spray disk, an atomizing spray disk fixing plate, a positive electrode, a negative electrode, a main atomizing airflow nozzle, an auxiliary protecting airflow nozzle, a 9 auxiliary atomizing cyclone nozzle, a conveying feed hole, a conical liquid drop spraying area, a main atomizing airflow nozzle, an auxiliary protecting airflow nozzle, an auxiliary atomizing cyclone nozzle, a 71 main atomizing airflow path hole, an 81 auxiliary protecting airflow path hole, a 91 annular seam nozzle, a 21 annular spray disk base plate, a 22 main atomizing airflow insert, a 221 outer convex limiting table, a 23 conical auxiliary insert, a 231, a spiral boss, a 24 auxiliary protecting airflow insert, a 241 inner concave limiting table, a 25 conveying feed hole insert, a 26, a first bearing, a 27, a second bearing, a 28, a limiting block, a 10 and a locking bolt.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Example 1
As shown in fig. 1 and fig. 2, the device for preparing vanadium-containing titanium alloy powder for 3D printing includes an atomizing spray disk 1, an atomizing spray disk fixing plate 2, a positive vanadium-containing titanium alloy electrode 3, and a negative vanadium-containing titanium alloy electrode 4, wherein the atomizing spray disk fixing plate 2 is provided with a conveying feed hole 5 for conveying the positive vanadium-containing titanium alloy electrode 3 and the negative vanadium-containing titanium alloy electrode 4, the positive vanadium-containing titanium alloy electrode 3 and the negative vanadium-containing titanium alloy electrode 5 are contacted with an outlet end of the conveying feed hole 5 to form a melting center, the atomizing spray disk 1 is provided with a main atomizing air flow nozzle 7 and an auxiliary protective air flow nozzle 8, atomizing air flows sprayed from the main atomizing air flow nozzle 7 are converged at the outlet end of the conveying feed hole 5 to form an atomizing center, the atomizing center coincides with the melting center and forms a conical droplet spraying area 6, an annular auxiliary atomization rotational flow nozzle 9 is further arranged between the main atomization airflow nozzle 7 and the auxiliary protection airflow nozzle 8 of the atomization spray disk 1;
the atomizing spray disk fixing plate 2 is tightly assembled below the atomizing nozzle 1, and the atomizing spray disk fixing plate 2 is correspondingly provided with a main atomizing airflow path hole 71 and an auxiliary protective airflow path hole 81 along the jet flow direction of the main atomizing airflow nozzle 7 and the auxiliary protective airflow nozzle 8;
the atomization spray disk fixing plate 2 is also provided with at least two circular seam nozzles 91, the auxiliary atomization rotational flow nozzle 9 is arranged at the outlet end of the conveying and feeding hole 5, the circular seam nozzles 91 form jet flow of a tangential melting central nozzle, and a jet flow path formed by each circular seam nozzle 91 is spirally arranged along a conical liquid drop spraying area 6 formed by an atomization center.
As a preferred embodiment, the main atomizing airflow path hole 71, the auxiliary shielding airflow path hole 81 and the circular seam nozzle 91 are arranged in a gradually narrowing manner, so that the airflow pressure at the outlet is enhanced, the ejection pressure of the atomizing spray disk 1 is reduced, and the production cost is further reduced.
Further, the atomizing spray disk fixing plate 2 comprises an annular spray disk base plate 21, a main atomizing airflow insert 22, a conical auxiliary insert 23, an auxiliary protective airflow insert 24 and a conveying feed hole insert 25 from outside to inside, wherein:
the annular spray disk base plate 21 is provided with an inverted conical inner side surface, and the main atomizing airflow insert 22 is embedded in the annular spray disk base plate 21 and forms the main atomizing airflow path hole 71 corresponding to the main atomizing airflow nozzle 7 with the annular spray disk base plate 21;
the main atomizing airflow insert 22 is provided with an inverted conical inner side surface, the conical auxiliary insert 23 is assembled in the main atomizing airflow insert 22 through a first bearing 26, a conical gap corresponding to the auxiliary atomizing swirl nozzle 9 is reserved between the conical auxiliary insert 23 and the main atomizing airflow insert 22, and the conical gap is divided into uniform circular seam nozzles 91 by helical bosses 231 uniformly distributed on the outer side of the conical auxiliary insert 23;
it should be noted that the outer side surface of the conical auxiliary insert 23 has different tapers corresponding to different circular seam nozzles 91, so that the jet paths formed by the circular seam nozzles 91 uniformly distributed along the conical gap are spirally distributed tangential to the conical droplet ejection area 6, for example, as shown in fig. 1 and fig. 2, in this embodiment, the conical gap is divided into six uniform circular seam nozzles 91 by a spiral boss 231, and the jet directions of the six circular seam nozzles 91 are all tangential to the conical droplet ejection area 6, and are spirally arranged by taking the axes of the melting center and the atomizing center as the axis.
The inner side of the conical auxiliary insert 23 is provided with an inverted conical inner side surface, the conical auxiliary insert 23 is assembled with the auxiliary shielding airflow insert 24 through a second bearing 27, and the conveying feed hole insert 25 is embedded in the inner side of the auxiliary shielding airflow insert 24 and forms the auxiliary shielding airflow path hole 81 corresponding to the auxiliary shielding airflow jet 8 together with the auxiliary shielding airflow insert 24.
As shown in fig. 2, in the present embodiment, the main atomizing air flow insert 22 is fixed to the annular spray disk base plate 21 by means of a male limit stop 221, the conveying feed hole insert 25 is fixed to the central hole of the atomizing spray disk 1 by means of a limit stop 28 in a key-and-slot structure, and the auxiliary shielding air flow insert 24 is fixed to the conveying feed hole insert 25 by means of a female limit stop 241, by which the main atomizing air flow path hole 71 and the auxiliary shielding air flow path hole 81 are defined in the present invention, so as to form a stable conical droplet ejection region 6. Meanwhile, the gas jet flow sprayed out of the auxiliary protection gas flow path hole 81 is converged in front of the conical liquid drop spraying area 6, and the effects of stable flow guiding and negative pressure back spraying prevention are achieved according to the Bernoulli principle.
As shown in fig. 2, in the present embodiment, the annular spray disk substrate 21 is mounted at the bottom of the atomizing spray disk 1 by the locking bolts 10 around the annular spray disk substrate.
In addition, the atomizing gas sprayed by the atomizing spray disk 1 from the main atomizing gas flow nozzle 7, the auxiliary shielding gas flow nozzle 8 and the annular auxiliary atomizing swirl nozzle 9 is inert gas such as argon or helium.
Example 2
The difference from the embodiment 1 is that in this embodiment, the inert gas ejected from the main atomizing airflow nozzle 7, the auxiliary shielding airflow nozzle 8 and the annular auxiliary atomizing cyclone nozzle 9 can be pressurized after passing through the system filtering device, and then is introduced into the main atomizing airflow nozzle 7, the auxiliary shielding airflow nozzle 8 and the annular auxiliary atomizing cyclone nozzle 9 again, so that the recycling of the inert gas is realized, the usage amount of the inert gas is greatly reduced, and the preparation cost of the vanadium-containing titanium alloy powder is reduced.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. The utility model provides a 3D prints preparation facilities with vanadium-containing titanium alloy powder, includes that the atomizing spouts a set, atomizing spouts a set fixed plate and anodal vanadium-containing titanium alloy electrode, negative pole contain vanadium-containing titanium alloy electrode, wherein, the atomizing spouts a set fixed plate and is equipped with and is used for carrying the transport feed hole of anodal vanadium-containing titanium alloy electrode, negative pole vanadium-containing titanium alloy electrode, just anodal vanadium-containing titanium alloy electrode, negative pole contain vanadium-containing titanium alloy electrode in carry the exit end contact constitution melting center of feed hole, the atomizing spouts a set and has main atomizing air current spout and supplementary guard air current spout, warp main atomizing air current spout spun atomizing air current is in carry the exit end of feed hole to assemble and form the center of atomization, the center with the center of melting coincidence forms toper droplet injection region, its characterized in that: the atomizing spray disk is also provided with an annular auxiliary atomizing swirl nozzle between the main atomizing airflow nozzle and the auxiliary protective airflow nozzle;
the atomization spray disk fixing plate is tightly assembled below the atomization nozzle, and the atomization spray disk fixing plate is correspondingly provided with a main atomization airflow path hole and an auxiliary protection airflow path hole along the jet flow direction of the main atomization airflow nozzle and the auxiliary protection airflow nozzle;
the atomization spray disk fixing plate is further provided with at least two circular seam nozzles, the auxiliary atomization rotational flow nozzle is arranged at the outlet end of the conveying and feeding hole, the circular seam nozzles form jet flow of a tangential melting central nozzle, and a jet flow path formed by each circular seam nozzle is spirally arranged along a conical liquid drop spraying area formed by an atomization center.
2. The device for preparing vanadium-containing titanium alloy powder for 3D printing according to claim 1, wherein the atomizing spray disk fixing plate comprises an annular spray disk base plate, a main atomizing airflow insert, a conical auxiliary insert, an auxiliary shielding airflow insert and a conveying feed hole insert from outside to inside, wherein:
the annular spraying disc base plate is provided with an inverted conical inner side surface, and the main atomizing airflow insert is embedded in the annular spraying disc base plate and forms a main atomizing airflow path hole corresponding to the main atomizing airflow nozzle together with the annular spraying disc base plate;
the main atomizing airflow insert is provided with an inverted conical inner side surface, the conical auxiliary insert is assembled in the main atomizing airflow insert through a first bearing, a conical gap corresponding to the auxiliary atomizing rotational flow nozzle is reserved between the conical auxiliary insert and the main atomizing airflow insert, and the conical gap is divided into uniform circular seam nozzles by spiral bosses uniformly distributed on the outer side of the conical auxiliary insert;
the inner side of the conical auxiliary insert is provided with an inverted conical inner side surface, the conical auxiliary insert is assembled with the auxiliary protection airflow insert through a second bearing, the conveying feeding hole insert is embedded in the inner side of the auxiliary protection airflow insert, and the conveying feeding hole insert and the auxiliary protection airflow insert form an auxiliary protection airflow path hole corresponding to an auxiliary protection airflow nozzle together.
3. The device for preparing vanadium-containing titanium alloy powder for 3D printing according to claim 1, wherein the diameters of the main atomizing airflow path hole, the auxiliary shielding airflow path hole and the circular seam nozzle are all arranged in a gradually narrowing mode.
4. The device for preparing vanadium-containing titanium alloy powder for 3D printing according to claim 2, wherein the outer side surface of the conical auxiliary insert has different tapers corresponding to different circumferential seam nozzles, so that the jet paths formed by the circumferential seam nozzles uniformly distributed along the conical gap are spirally distributed tangential to the conical liquid droplet jetting area.
5. The device for preparing vanadium-containing titanium alloy powder for 3D printing according to claim 2, wherein the main atomizing airflow insert and the annular spraying plate base plate are fixed by being embedded in a convex limiting table, the conveying feed hole insert is fixed at a central hole of the atomizing spraying plate by a limiting block in a keyway structure, and the auxiliary protecting airflow insert is fixed by being embedded in a concave limiting table.
6. The device for preparing vanadium-containing titanium alloy powder for 3D printing according to claim 1, wherein the atomizing gas sprayed by the atomizing spray disk from the main atomizing gas flow nozzle, the auxiliary protective gas flow nozzle and the annular auxiliary atomizing swirl nozzle is argon or helium.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121894785.3U CN215544927U (en) | 2021-08-13 | 2021-08-13 | 3D prints with preparation facilities that contains vanadium titanium alloy powder |
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| CN202121894785.3U CN215544927U (en) | 2021-08-13 | 2021-08-13 | 3D prints with preparation facilities that contains vanadium titanium alloy powder |
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