CN111906323A - Gas atomization device and method for efficient online continuous production - Google Patents
Gas atomization device and method for efficient online continuous production Download PDFInfo
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- CN111906323A CN111906323A CN202010810732.2A CN202010810732A CN111906323A CN 111906323 A CN111906323 A CN 111906323A CN 202010810732 A CN202010810732 A CN 202010810732A CN 111906323 A CN111906323 A CN 111906323A
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- 238000010924 continuous production Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000009689 gas atomisation Methods 0.000 title claims description 16
- 239000002994 raw material Substances 0.000 claims abstract description 211
- 238000011084 recovery Methods 0.000 claims abstract description 61
- 238000003723 Smelting Methods 0.000 claims abstract description 50
- 238000000889 atomisation Methods 0.000 claims abstract description 31
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 150
- 229910052786 argon Inorganic materials 0.000 claims description 75
- 239000007921 spray Substances 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 16
- 239000000725 suspension Substances 0.000 claims description 11
- 238000012387 aerosolization Methods 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 4
- 238000003754 machining Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 125000003003 spiro group Chemical group 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 239000000843 powder Substances 0.000 description 9
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 8
- 238000010146 3D printing Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910001069 Ti alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical class [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0848—Melting process before atomisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/086—Cooling after atomisation
- B22F2009/0876—Cooling after atomisation by gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0896—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid particle transport, separation: process and apparatus
Abstract
The invention discloses an air atomization device and method for efficient online continuous production, which comprises a smelting chamber, a raw material pre-loading bin, a working bin and a stub bar recovery bin; a raw material pre-loading bin, a working bin and a stub bar recovery bin are horizontally arranged above the smelting chamber in parallel and are attached, the lower end of the raw material pre-loading bin is communicated with the smelting chamber, the raw material pre-loading bin and the working bin are separated by a first bin gate, and the working bin and the stub bar recovery bin are separated by a second bin gate; a conveying belt is horizontally arranged in the raw material pre-loading bin, the working bin and the stub bar recovery bin in an annular manner, and the conveying belt slides in a sealing manner with the first bin door and the second bin door; and a manipulator and a raw material rod feeding device are arranged in the raw material pre-loading bin, the manipulator moves the raw material rod group to the raw material rod feeding device from the transmission belt, and the raw material rod feeding device moves the raw material rod group to the smelting chamber for smelting and atomizing. The invention realizes the operations of loading, atomizing and cooling at the same time, shortens the production time and improves the production efficiency.
Description
Technical Field
The invention relates to the field of metal powder preparation, in particular to an air atomization device and an air atomization method for efficient online continuous production.
Background
Nowadays, with the demand of industrial development, the additive manufacturing technology develops rapidly due to its advantages of short development cycle, no new consumable material, and capability of manufacturing complex parts, and especially the metal 3D printing technology becomes the focus of international researchers. The raw material for metal 3D printing is metal powder with a certain particle size section, and the raw material is required to have pure chemical components, low oxygen content, high sphericity, good fluidity and loose packing density meeting certain requirements. The 3D printing technology in China starts late, is supported by the government at present, and has a large amount of mechanisms for researching and developing metal 3D printing powder, such as Shanghai institute of materials, northwest colored research institute, Antai science and technology corporation, etc., and the 3D printing technology in China has a large gap with internationally developed countries such as Germany, British, Canada, USA, etc. Particularly in the technical field of crucible-free induction melting gas atomization, metal powders such as titanium alloy, cobalt-chromium alloy, aluminum alloy and the like produced in China have low yield, high cost and poor batch stability, and the products still need to be imported.
At present, when metal powder such as titanium alloy, cobalt-chromium alloy, aluminum alloy and the like is prepared by a crucible-free induction melting gas atomization technology in China, after a bar is melted and atomized, a bin needs to be vacuumized and emptied to prevent argon from leaking, after a raw material bar is replaced, the bin is vacuumized and replaced by argon again, the production time is too long, and the production efficiency is low. And the melting damage of the bar connecting bolt is avoided, titanium alloy stub bars with the thickness of about 60mm can be generally reserved after the melting atomization, the stub bars cannot be converted into products, the temperature of the stub bars which are just taken out is very high, the oxidation and nitridation phenomena are very easy to occur after the stub bars are contacted with air, the residual stub bars are used as waste products, and the production cost is seriously increased. At present, although some mechanisms try to increase the production efficiency, the loading, the atomization and the cooling cannot be carried out simultaneously, namely, the efficient online continuous production cannot be realized. Therefore, how to realize the cooling of the stub bar and eliminate the residual stub bar so as to realize the efficient online continuous production is a difficult problem to be solved at present.
Disclosure of Invention
The invention aims to solve the technical problem of providing an air atomization device and an air atomization method for efficient online continuous production, wherein three chambers can be communicated and isolated through chamber doors, and are respectively provided with independent pipelines for carrying out vacuumizing, argon filling and air breaking operations on each chamber, so that the operations of loading, atomizing and cooling are simultaneously carried out, the production time is greatly shortened, and the production efficiency is improved.
In order to solve the technical problems, the invention adopts the following technical scheme: the invention relates to an air atomization device and a method for efficient online continuous production, which have the innovation points that: comprises a smelting chamber, a raw material pre-loading bin, a working bin and a stub bar recovery bin; a raw material pre-loading bin, a working bin and a stub bar recovery bin are sequentially and horizontally attached to the right above the smelting chamber from left to right in parallel, the lower end of the raw material pre-loading bin is communicated with a raw material rod feeding port of the smelting chamber through a gate valve, the raw material pre-loading bin is separated from the working bin through a first bin gate, and the working bin is separated from the stub bar recovery bin through a second bin gate; a first vacuum pipeline, a first argon pipeline and a first vacuum breaking pipeline are communicated with the raw material pre-loading bin, and a second vacuum pipeline, a second argon pipeline and a second vacuum breaking pipeline are communicated with the stub bar recovery bin; a conveying belt is further arranged on the upper inner side of the raw material pre-loading bin, the working bin and the stub bar recovery bin in an annular horizontal transverse rotating mode, and the conveying belt is horizontally sealed and slides with the first bin door and the second bin door respectively; each raw material rod group is vertically hung on the conveying belt at intervals in turn and horizontally and annularly moves in the raw material pre-loading bin, the working bin and the stub bar recovery bin through the conveying belt; and a manipulator and a raw material rod feeding device are further arranged in the raw material pre-loading bin, the manipulator moves the raw material rod group to the raw material rod feeding device from the transmission belt, and the raw material rod feeding device moves the raw material rod group to the smelting chamber for smelting and atomizing.
Preferably, one end of the first vacuum pipeline is fixedly arranged at a position below the outer side wall of the raw material pre-loading bin and is hermetically communicated with the interior of the raw material pre-loading bin, the other end of the first vacuum pipeline is connected with a first vacuum pump, and a first vacuum pipeline valve is further arranged on the first vacuum pipeline; one end of the first argon introducing pipeline is fixedly arranged on the upper surface of the raw material pre-loading bin and is hermetically communicated with the interior of the raw material pre-loading bin, and a first argon introducing pipeline valve is further arranged on the first argon introducing pipeline; one end of the first vacuum pipeline is fixedly arranged on the upper position of the outer side wall of the raw material pre-loading bin, is communicated with the inner seal of the raw material pre-loading bin, and is further provided with a first vacuum pipeline valve.
Preferably, one end of the second vacuum pipeline is fixedly arranged at a position below the outer side wall of the stub bar recovery bin and is communicated with the interior of the stub bar recovery bin in a sealing manner, the other end of the second vacuum pipeline is connected with a second vacuum pump, and a second vacuum pipeline valve is further arranged on the second vacuum pipeline; one end of the second argon pipeline is fixedly arranged on the upper surface of the stub bar recovery bin, and is communicated with the interior of the stub bar recovery bin in a sealing manner, and a second argon pipeline valve is arranged on the second argon pipeline; one end of the second hollow pipeline is fixedly arranged on the upper side of the outer side wall of the stub bar recovery bin, is communicated with the inner seal of the stub bar recovery bin, and is further provided with a second hollow pipeline valve.
Preferably, still interval equipartition has seted up the first draw-in groove of several along its circumferencial direction on the lateral surface of transmission band, the quantity of first draw-in groove is 4~12, and each first draw-in groove all with correspond the upper end phase-match of raw materials stick group.
Preferably, the raw material rod feeding device comprises a rod chuck, a connecting rod and a feeding motor; the feeding motor is vertically arranged on the upper surface of the working bin, the output end of the feeding motor vertically extends downwards to the inside of the working bin, and the feeding motor is in linkage connection with the horizontally arranged bar chuck through a connecting rod; the bar stock chuck is arranged at the center of the conveying belt, and is also provided with a second clamping groove, the second clamping groove is matched with the upper end corresponding to the raw material bar group, and the arrangement position of the second clamping groove corresponds to the arrangement position of the raw material bar feeding port of the smelting chamber; the manipulator moves the raw material rod set to the rod chuck from the conveying belt, the upper end of the raw material rod set is clamped in the second clamping groove, and the feeding motor rotates the raw material rod set to move downwards.
Preferably, each raw material rod group comprises a raw material rod, a bar suspension bolt, a bar connecting bolt and a stub bar; each raw material rod is vertically arranged, and the upper end and the lower end of each raw material rod are provided with internal thread holes with the same specification; the upper end of each bar hanging bolt is respectively matched with the second clamping groove of the bar chuck and the corresponding first clamping groove of the transmission belt, and the lower end of each bar hanging bolt is respectively fixed with the inner threaded hole corresponding to the upper end of the raw material bar in a threaded manner; each the equal vertical setting of bar connecting bolt, and the external screw thread of same specification is all seted up at its upper and lower both ends, each bar connecting bolt's upper end respectively with correspond the internal thread hole spiro union of feed rod lower extreme is fixed, and its upper end respectively with the second draw-in groove of bar chuck and the first draw-in groove phase-match of correspondence of transmission band, each bar connecting bolt's lower extreme respectively with correspond the upper end spiro union of stub bar is fixed, and each the stub bar is the remaining stub bar after the feed rod gas atomization.
Preferably, the nominal diameter of the thread in each raw material rod group is 8-30 mm.
Preferably, one end of the second argon introducing pipeline extends to the interior of the stub bar recovery bin and cools the corresponding stub bar; the argon gas pipeline that leads to of second still equipartition interval intercommunication is equipped with the several spray tube on extending the partial pipeline in feed head recovery storehouse, the quantity of spray tube is 2~6, and each the end of spray tube all with correspond distance between the stub bar is 20~100 mm.
Preferably, the argon gas spraying pressure of each spraying pipe is 0.3-1.5 MPa, and the flow rate of the argon gas spraying pressure is 0.5-3 m for carrying out the cultivation in a year/min mode.
The invention relates to an air atomization method of an air atomization device for efficient online continuous production, which is characterized by comprising the following steps:
the method comprises the following steps: machining the raw material rod, wherein the upper end and the lower end of the raw material rod are both provided with internal thread holes with the same specification; then screwing a bar suspension bolt into the internal thread hole at the upper end of the raw material bar, screwing the upper end of a bar connecting bolt into the internal thread hole at the lower end of the raw material bar, screwing the lower end of the bar connecting bolt into a stub bar, and assembling into a raw material bar group;
step two: placing the assembled raw material rod group on a conveying belt in a raw material pre-loading bin, enabling the upper end of a rod hanging bolt to be in contact with a first clamping groove of the conveying belt, then opening a first bin door and a second bin door, vacuumizing three bins, and filling argon until the air pressure is 101kPa after the vacuum degree reaches 0.5-2 Pa;
step three: the raw material rod group is moved to a working bin through a conveying belt, a first bin gate and a second bin gate are closed, the raw material rod group is moved to a rod chuck through a manipulator, and the verticality of the raw material rod group is guaranteed; then starting a feeding motor to enable the raw material rod group to rotate and move downwards, and carrying out a smelting atomization process by matching with high-frequency electricity and high-pressure argon; vacuumizing and breaking the space of the raw material pre-loading bin to prevent argon gas leakage while smelting and atomizing the working bin, and vacuumizing and replacing argon gas in the raw material pre-loading bin after replacing a new raw material rod set;
step four: after smelting and atomization are completed, the manipulator moves the stub bar from the bar chuck to the conveying belt, so that the upper end of the bar connecting bolt is in contact with the first clamping groove of the conveying belt; then opening the first bin gate and the second bin gate, rotating the conveying belt, moving a new raw material rod group from the raw material pre-loading bin to the working bin, and simultaneously moving the stub bar from the working bin to the stub bar recovery bin;
step five: closing the first bin gate and the second bin gate, replacing the raw material pre-loading bin with a new raw material rod group again, and performing vacuumizing and argon replacement operation; meanwhile, a feed motor is started in the working bin to move the corresponding raw material rod group to a smelting chamber for smelting and atomization; and the stub bar recovery bin starts to be vacuumized, and an argon pipeline is opened to cool the stub bar, so that the synchronous feeding, atomizing and cooling are realized.
The invention has the beneficial effects that:
(1) the invention is provided with three bins above the smelting chamber: the device comprises a raw material pre-loading bin, a working bin and a stub bar recovery bin, wherein all bins can be communicated and isolated through bin gates, and are respectively provided with independent pipelines for carrying out vacuumizing, argon filling and air breaking operations on all bins; through the innovative design of the first bin door, the second bin door, the transmission belt, the mechanical arm and the feeding motor, the operations of loading, atomizing and cooling are realized simultaneously, namely, a high-efficiency online continuous production mode of crucible-free vacuum melting gas atomization is realized, so that the production time is greatly shortened, and the production efficiency is improved;
(2) according to the invention, the upper end and the lower end of the raw material rod are provided with the internal thread holes, and the raw material rod is tightly matched with the material heads of the previous batch through the rod connecting bolt provided with the titanium alloy material, so that the utilization rate of the raw material rod reaches 100%, and the cost is reduced;
(3) according to the invention, 2-6 spray pipes are uniformly distributed on the part of the second argon-filled pipeline extending to the feed head recovery bin at intervals, a vacuum pump is used for pumping air and argon is filled to form a flowing air flow, and the distance, the cooling pressure and the flow of the tail end of each spray pipe and the feed head are controlled, so that the feed head is cooled efficiently and at low cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an atomizing apparatus for efficient on-line continuous production according to the present invention.
FIG. 2 is a partial schematic view of an aerosolization apparatus for efficient in-line continuous production in accordance with the present invention.
FIG. 3 is a schematic view showing the structure of the feeding portion of the raw material stick of FIG. 1.
Fig. 4 is a schematic view of the connection of the raw material rod set of fig. 3.
Fig. 5 is a schematic structural diagram of the transmission belt in fig. 1.
FIG. 6 is a schematic view of the position of the conveyor belt and the raw material bar set of the raw material pre-loading bin of FIG. 1.
FIG. 7 is a schematic diagram comparing the conventional crucible-less vacuum melting inert gas atomization technique and the high-efficiency on-line continuous gas atomization method of the present invention.
Wherein, 1-raw material rod group; 2, conveying the belt; 3-pre-loading raw materials into a bin; 4-a first bin gate; 5-a second bin gate; 6-a first vacuum pump; 7-a first vacuum line valve; 8-a first argon pipeline valve; 9-a working bin; 10-a manipulator; 11-a bar chuck; 12-a feed motor; 13-a first break-empty pipe valve; 14-stub bar recovery bin; 15-a second vacuum pump; 16-a second vacuum line valve; 17-a second argon gas pipeline valve; 18-a second break-empty pipe valve; 19-a smelting chamber; 20-a first vacuum line; 21-a first argon pipeline; 22-a first broken conduit; 23-a second vacuum conduit; 24-a second argon gas passage; 25-a second broken pipeline; 26-a gate valve; 101-hanging bolts from bars; 102-a feedstock bar; 103-bar connecting bolt; 104-stub bar.
Detailed Description
The technical solution of the present invention will be clearly and completely described by the following detailed description.
The invention relates to a gas atomization device and a method for efficient online continuous production, which comprises a smelting chamber 19, a raw material pre-loading bin 3, a working bin 9 and a stub bar recovery bin 14; the specific structure is as shown in fig. 1-3, a raw material pre-loading bin 3, a working bin 9 and a stub bar recovery bin 14 are sequentially, horizontally and parallelly attached from left to right above a smelting chamber 19, the lower end of the raw material pre-loading bin 3 is communicated with a raw material rod feeding port of the smelting chamber 19 through a gate valve 26, the raw material pre-loading bin 3 is separated from the working bin 9 through a first bin gate 4, and the working bin 9 is separated from the stub bar recovery bin 14 through a second bin gate 5; the three chambers are communicated and isolated through a first chamber door 4 and a second chamber door 5.
According to the invention, a first vacuum pipeline 20, a first argon pipeline 21 and a first vacuum breaking pipeline 22 are communicated with a raw material pre-loading bin 3, as shown in figures 1-3, one end of the first vacuum pipeline 20 is fixedly arranged at the lower position of the outer side wall of the raw material pre-loading bin 3 and is hermetically communicated with the interior of the raw material pre-loading bin 3, the other end of the first vacuum pipeline 20 is connected with a first vacuum pump 6, and a first vacuum pipeline valve 7 is further arranged on the first vacuum pipeline 20, so that the raw material pre-loading bin 3 is independently vacuumized; one end of a first argon introducing pipeline 21 is fixedly arranged on the upper surface of the raw material pre-loading bin 3 and is hermetically communicated with the interior of the raw material pre-loading bin 3, and a first argon introducing pipeline valve 8 is also arranged on the first argon introducing pipeline 21; one end of the first hollow pipeline 22 is fixedly arranged on the upper side of the outer side wall of the raw material pre-loading bin 3 and is communicated with the inner part of the raw material pre-loading bin 3 in a sealing manner, and a first hollow pipeline valve 13 is further arranged on the first hollow pipeline 22. Through setting up first leading to argon gas pipeline valve 8 and first broken empty pipeline valve 13, realized leading to argon gas replacement air and broken empty operation alone to raw materials pre-installation storehouse 3.
A second vacuum pipeline 23, a second argon pipeline 24 and a second vacuum breaking pipeline 25 are communicated with a stub bar recovery bin 14; as shown in fig. 1 to 3, one end of the second vacuum pipe 23 is fixedly disposed at a position below the outer side wall of the stub bar recovery bin 14 and is hermetically communicated with the inside of the stub bar recovery bin 14, the other end of the second vacuum pipe 23 is connected with the second vacuum pump 15, and the second vacuum pipe 23 is further provided with a second vacuum pipe valve 16, so that the stub bar recovery bin 14 is independently vacuumized; one end of a second argon introducing pipeline 24 is fixedly arranged on the upper surface of the stub bar recovery bin 14 and is communicated with the interior of the stub bar recovery bin 14 in a sealing way, and a second argon introducing pipeline valve 17 is also arranged on the second argon introducing pipeline 24; one end of the second hollow pipeline 25 is fixedly arranged on the upper side of the outer side wall of the stub bar recovery bin 14, and is communicated with the interior of the stub bar recovery bin 14 in a sealing manner, and a second hollow pipeline valve 18 is further arranged on the second hollow pipeline 25. Through setting up second and leading to argon gas pipeline valve 17 and second broken empty pipeline valve 18, realized leading to argon gas cooling stub bar and broken empty operation to stub bar recovery bin 14. One end of the second argon pipeline 24 extends to the interior of the stub bar recovery bin 14 and cools the corresponding stub bar 104; a plurality of spray pipes are uniformly distributed on the part of the second argon pipeline 24 extending to the feeding head recovery bin 14 at intervals, the number of the spray pipes is 2-6, and the distance between the tail end of each spray pipe and the corresponding head 104 is 20-100 mm; the argon gas spraying pressure of each spraying pipe is 0.3-1.5 MPa, and the flow rate is 0.5-3 m for cultivation/min.
As shown in fig. 1 to 6, a conveying belt 2 is further horizontally and rotatably arranged at an upper position inside the raw material pre-loading bin 3, the working bin 9 and the stub bar recovery bin 14 in an annular horizontal manner, and the conveying belt 2 horizontally and hermetically slides with the first bin door 4 and the second bin door 5 respectively; not only is the first bin door 4 and the second bin door 5 ensured not to influence the motion of the conveying belt 2, but also the sealing performance among the three bins is ensured. Wherein, still interval equipartition has seted up the first draw-in groove of several along its circumferencial direction in proper order on the lateral surface of transmission band 2, and the quantity of first draw-in groove is 4~12, and each first draw-in groove all with correspond the upper end phase-match of raw materials stick group 1.
The invention also provides a manipulator 10 and a raw material bar feeding device in the raw material pre-loading bin 3, wherein the raw material bar feeding device comprises a bar chuck 11, a connecting rod and a feeding motor 12; as shown in fig. 1 to 3, the feeding motor 12 is vertically arranged on the upper surface of the working bin 9, and the output end of the feeding motor vertically extends downwards to the inside of the working bin 9 and is linked and connected with the horizontally arranged bar chuck 11 through a connecting rod; the bar stock chuck 11 is arranged at the center of the conveying belt 2, and a second clamping groove is also formed in the bar stock chuck 11 and matched with the upper end of the corresponding raw material bar group 1, and the arrangement position of the second clamping groove corresponds to the arrangement position of a raw material bar feeding port of the smelting chamber 19; according to the invention, the manipulator 10 moves the raw material rod group 1 from the transmission belt 2 to the bar chuck 11, the upper end of the raw material rod group is clamped in the second clamping groove, and the feeding motor 12 rotates the raw material rod group 1 to move downwards to the smelting chamber 19 for smelting and atomizing.
In the invention, each raw material rod group 1 is sequentially vertically hung on a conveying belt 2 at intervals and horizontally and annularly moves in a raw material pre-loading bin 3, a working bin 9 and a stub bar recovery bin 14 through the conveying belt 2; each raw material rod group 1 comprises a raw material rod 102, a bar suspension bolt 101, a bar connecting bolt 103 and a stub bar 104; as shown in fig. 1 to 6, each raw material rod 102 is vertically arranged, and the upper end and the lower end of each raw material rod are provided with internal thread holes with the same specification; the upper end of each bar suspension bolt 101 is respectively matched with the second clamping groove of the bar chuck 11 and the corresponding first clamping groove of the transmission belt 2, and the lower end of each bar suspension bolt is respectively fixed with the internal threaded hole at the upper end of the corresponding raw material rod 102 in a threaded manner; each bar connecting bolt 103 is vertically arranged, external threads with the same specification are arranged at the upper end and the lower end of each bar connecting bolt 103, the upper end of each bar connecting bolt 103 is fixed with an internal thread hole corresponding to the lower end of the raw material rod 102 in a threaded manner, the upper end of each bar connecting bolt 103 is matched with a second clamping groove of the bar chuck 11 and a corresponding first clamping groove of the transmission band 2, the lower end of each bar connecting bolt 103 is fixed with the upper end of the corresponding stub bar 104 in a threaded manner, and each stub bar 104 is a residual stub bar after the raw material rod 102 is atomized. Wherein the nominal diameter of the thread in each raw material rod group 1 is 8-30 mm. According to the invention, the upper end and the lower end of the raw material rod 102 are provided with the internal threaded holes, the tight fit between the raw material rod 102 and the material head 104 of the previous batch is realized through the rod connecting bolt 103 made of titanium alloy material, so that the material head 104 cooled in the previous batch can be repeatedly utilized, the utilization rate of the raw material rod 102 is 100%, and the cost is reduced.
Example one
Taking preparation of TC4 powder for 3D printing as an example, the invention provides an atomization method of an atomization device for efficient online continuous production, which comprises the following steps:
the method comprises the following steps: machining the raw material rod 102, wherein the upper end and the lower end of the raw material rod are both provided with internal thread holes with the same specification; then screwing a bar suspension bolt 101 into an internal thread hole at the upper end of the raw material bar 102, screwing the upper end of a bar connecting bolt 103 into an internal thread hole at the lower end of the raw material bar 102, screwing the lower end of the bar connecting bolt 103 into a stub bar 104, assembling into a TC4 raw material bar group, wherein the specification of the assembled raw material bar group is phi 60 multiplied by 600 mm;
in the steps, the thread specification is uniformly standard threads M16 multiplied by 25mm, and the thread pitch is 2 mm.
Step two: putting the assembled TC4 raw material rod group on a conveying belt 2 in a raw material pre-loading bin 3, enabling the upper end of a rod suspension bolt 101 to be in contact with a first clamping groove of the conveying belt 2, then opening a first bin gate 4 and a second bin gate 5, vacuumizing three bins, and filling argon until the air pressure is 101kPa after the vacuum degree reaches 1 Pa.
Step three: the TC4 raw material rod group is moved to a working bin 9 through a conveying belt 2, a first bin gate 4 and a second bin gate 5 are closed, and a mechanical arm 10 is used for moving the TC4 raw material rod group to a rod chuck 11 and ensuring the verticality of the raw material rod group; then starting a feed motor 12 to enable the TC4 raw material rod group to move downwards while rotating, wherein the moving speed is 60mm/min, a smelting atomization process is carried out by matching with high-frequency electricity and high-pressure argon, the smelting power is 45Kw, and the atomization pressure is 5 MPa; when the working bin 9 is used for smelting and atomizing, the raw material pre-loading bin 3 is vacuumized to 20Pa and broken to prevent argon leakage, and then after a new TC4 raw material rod group is replaced, the raw material pre-loading bin 3 is vacuumized to 1Pa and argon is replaced to the pressure of 101 kPa.
Step four: after the smelting atomization and the powder collection are completed, the manipulator 10 moves the stub bar 104 from the bar chuck 11 to the conveyor belt 2, so that the upper end of the bar connecting bolt 103 is in contact with the first clamping groove of the conveyor belt 2; the first and second gates 4, 5 are then opened and the conveyor 2 is rotated to move a new set of TC4 raw material sticks from the raw material pre-loading bin 3 to the working bin 9, whilst the stub bar 104 is moved from the working bin 9 to the stub recovery bin 14.
Step five: closing the first bin gate 4 and the second bin gate 5, replacing the raw material pre-loading bin 3 with a new TC4 raw material rod group again, vacuumizing to 1Pa, and replacing argon until the pressure is 101 kPa; meanwhile, a feed motor 12 in the working bin 9 is started to move the corresponding TC4 raw material rod group to the smelting chamber 19 for smelting and atomization, wherein the smelting power is 45Kw, and the atomization pressure is 5 MPa; in addition, the stub bar recovery bin 14 starts to be vacuumized, an argon pipeline is opened to cool the stub bar 104, and the production efficiency is recorded;
in the above step, the number of the spray pipes is 4, and the spray pipes are uniformly distributed around the stub bar 104; the distance between the tail end of the spray pipe and the stub bar 104 is 50mm, the pressure is 0.8MPa, and the flow is 0.6m for carrying out the downward cultivation/min.
Example two
Taking the preparation of TA15 powder for 3D printing as an example, the invention relates to an air atomization method of an air atomization device for efficient online continuous production, which comprises the following steps:
the method comprises the following steps: machining the raw material rod 102, wherein the upper end and the lower end of the raw material rod are both provided with internal thread holes with the same specification; then screwing a bar suspension bolt 101 into an internal thread hole at the upper end of the raw material bar 102, screwing the upper end of a bar connecting bolt 103 into an internal thread hole at the lower end of the raw material bar 102, screwing the lower end of the bar connecting bolt 103 into a stub bar 104, assembling into a TA15 raw material bar group, wherein the specification of the assembled raw material bar group is phi 60 x 600 mm;
in the steps, the thread specification is uniformly standard threads M16 multiplied by 25mm, and the thread pitch is 2 mm.
Step two: and (3) placing the assembled TA15 raw material rod group on the conveying belt 2 in the raw material pre-loading bin 3, enabling the upper end of the rod suspension bolt 101 to be in contact with a first clamping groove of the conveying belt 2, then opening the first bin gate 4 and the second bin gate 5, vacuumizing the three bins, and filling argon until the air pressure is 101kPa after the vacuum degree reaches 1.5 Pa.
Step three: the TA15 raw material rod group is moved to a working bin 9 through a conveying belt 2, a first bin gate 4 and a second bin gate 5 are closed, and a manipulator 10 is used for moving the TA15 raw material rod group to a rod chuck 11 and ensuring the verticality of the TA15 raw material rod group; then starting a feed motor 12 to enable the TA15 raw material rod group to move downwards while rotating, wherein the moving speed is 50mm/min, and a smelting atomization process is carried out by matching with high-frequency electricity and high-pressure argon, wherein the smelting power is 40Kw, and the atomization pressure is 4.5 MPa; when the working bin 9 is used for smelting and atomizing, the raw material pre-loading bin 3 is vacuumized to 20Pa and broken to prevent argon leakage, and then after a new TA15 raw material rod group is replaced, the raw material pre-loading bin 3 is vacuumized to 1.5Pa and argon is replaced until the air pressure is 101 kPa.
Step four: after the smelting atomization and the powder collection are completed, the manipulator 10 moves the stub bar 104 from the bar chuck 11 to the conveyor belt 2, so that the upper end of the bar connecting bolt 103 is in contact with the first clamping groove of the conveyor belt 2; the first door 4 and second door 5 are then opened and the conveyor 2 is rotated to move a new group of TA15 raw material sticks from the raw material pre-loading bin 3 to the working bin 9, whilst the stub bar 104 is moved from the working bin 9 to the stub recovery bin 14.
Step five: closing the first bin gate 4 and the second bin gate 5, replacing the raw material pre-loading bin 3 with a new TA15 raw material rod group again, vacuumizing to 1.5Pa, and replacing argon to reach the pressure of 101 kPa; meanwhile, a feed motor 12 in the working bin 9 is started to move the corresponding TA15 raw material rod group to the smelting chamber 19 for smelting and atomization, wherein the smelting power is 40Kw, and the atomization pressure is 4.5 MPa; in addition, the stub bar recovery bin 14 starts to be vacuumized, an argon pipeline is opened to cool the stub bar, and the production efficiency is recorded;
in the above step, the number of the spray pipes is 4, and the spray pipes are uniformly distributed around the stub bar 104; the distance between the tail end of the spray pipe and the stub bar 104 is 50mm, the pressure is 0.6MPa, and the flow is 0.5m for carrying out the downward cultivation/min.
The comparison of the atomization results of the conventional crucible-free vacuum melting inert gas atomization technology and the high-efficiency on-line continuous gas atomization method of the invention is shown in table 1 shown in fig. 7.
The invention has the beneficial effects that:
(1) the invention is provided with three bins above the smelting chamber: the device comprises a raw material pre-loading bin 3, a working bin 9 and a stub bar recovery bin 14, wherein all bins can be communicated and isolated through bin gates, and are respectively provided with independent pipelines for carrying out vacuumizing, argon filling and air breaking operations on all bins; through the innovative design of the first bin gate 4, the second bin gate 5, the conveying belt 2, the manipulator 10 and the feeding motor 12, the operations of loading, atomizing and cooling are simultaneously realized, namely, a high-efficiency online continuous production mode of crucible-free vacuum melting gas atomization is realized, so that the production time is greatly shortened, and the production efficiency is improved;
(2) according to the invention, the upper end and the lower end of the raw material rod 102 are provided with the internal threaded holes, and the raw material rod 102 is tightly matched with the material heads 104 of the previous batch through the rod connecting bolts 103 made of titanium alloy materials, so that the utilization rate of the raw material rod 102 reaches 100%, and the cost is reduced;
(3) according to the invention, 2-6 spray pipes are uniformly distributed on the part of the second argon-filled pipeline 24 extending to the feeding head recovery bin 14 at intervals, a vacuum pump is used for pumping air and an argon-filled mode is used for forming a flowing air flow, and the distance, the cooling pressure and the flow of the tail end of each spray pipe and the material head are controlled, so that the material head 104 is cooled efficiently and at low cost.
The above-mentioned embodiments are merely descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art should fall into the protection scope of the present invention without departing from the design concept of the present invention, and the technical contents of the present invention as claimed are all described in the technical claims.
Claims (10)
1. The utility model provides a gas atomizing device for high-efficient online continuous production which characterized in that: comprises a smelting chamber, a raw material pre-loading bin, a working bin and a stub bar recovery bin; a raw material pre-loading bin, a working bin and a stub bar recovery bin are sequentially and horizontally attached to the right above the smelting chamber from left to right in parallel, the lower end of the raw material pre-loading bin is communicated with a raw material rod feeding port of the smelting chamber through a gate valve, the raw material pre-loading bin is separated from the working bin through a first bin gate, and the working bin is separated from the stub bar recovery bin through a second bin gate; a first vacuum pipeline, a first argon pipeline and a first vacuum breaking pipeline are communicated with the raw material pre-loading bin, and a second vacuum pipeline, a second argon pipeline and a second vacuum breaking pipeline are communicated with the stub bar recovery bin; a conveying belt is further arranged on the upper inner side of the raw material pre-loading bin, the working bin and the stub bar recovery bin in an annular horizontal transverse rotating mode, and the conveying belt is horizontally sealed and slides with the first bin door and the second bin door respectively; each raw material rod group is vertically hung on the conveying belt at intervals in turn and horizontally and annularly moves in the raw material pre-loading bin, the working bin and the stub bar recovery bin through the conveying belt; and a manipulator and a raw material rod feeding device are further arranged in the raw material pre-loading bin, the manipulator moves the raw material rod group to the raw material rod feeding device from the transmission belt, and the raw material rod feeding device moves the raw material rod group to the smelting chamber for smelting and atomizing.
2. An aerosolization apparatus for efficient in-line continuous production in accordance with claim 1, wherein: one end of the first vacuum pipeline is fixedly arranged at the lower position of the outer side wall of the raw material pre-loading bin and is communicated with the interior of the raw material pre-loading bin in a sealing manner, the other end of the first vacuum pipeline is connected with a first vacuum pump, and a first vacuum pipeline valve is further arranged on the first vacuum pipeline; one end of the first argon introducing pipeline is fixedly arranged on the upper surface of the raw material pre-loading bin and is hermetically communicated with the interior of the raw material pre-loading bin, and a first argon introducing pipeline valve is further arranged on the first argon introducing pipeline; one end of the first vacuum pipeline is fixedly arranged on the upper position of the outer side wall of the raw material pre-loading bin, is communicated with the inner seal of the raw material pre-loading bin, and is further provided with a first vacuum pipeline valve.
3. An aerosolization apparatus for efficient in-line continuous production in accordance with claim 1, wherein: one end of the second vacuum pipeline is fixedly arranged at the lower position of the outer side wall of the stub bar recovery bin and is communicated with the interior of the stub bar recovery bin in a sealing manner, the other end of the second vacuum pipeline is connected with a second vacuum pump, and a second vacuum pipeline valve is further arranged on the second vacuum pipeline; one end of the second argon pipeline is fixedly arranged on the upper surface of the stub bar recovery bin, and is communicated with the interior of the stub bar recovery bin in a sealing manner, and a second argon pipeline valve is arranged on the second argon pipeline; one end of the second hollow pipeline is fixedly arranged on the upper side of the outer side wall of the stub bar recovery bin, is communicated with the inner seal of the stub bar recovery bin, and is further provided with a second hollow pipeline valve.
4. An aerosolization apparatus for efficient in-line continuous production according to claim 3, wherein: still interval equipartition has seted up the first draw-in groove of several along its circumferencial direction in proper order on the lateral surface of transmission band, the quantity of first draw-in groove is 4~12, and each first draw-in groove all with correspond the upper end phase-match of raw materials stick group.
5. An aerosolization apparatus for efficient in-line continuous production in accordance with claim 4, wherein: the raw material rod feeding device comprises a rod chuck, a connecting rod and a feeding motor; the feeding motor is vertically arranged on the upper surface of the working bin, the output end of the feeding motor vertically extends downwards to the inside of the working bin, and the feeding motor is in linkage connection with the horizontally arranged bar chuck through a connecting rod; the bar stock chuck is arranged at the center of the conveying belt, and is also provided with a second clamping groove, the second clamping groove is matched with the upper end corresponding to the raw material bar group, and the arrangement position of the second clamping groove corresponds to the arrangement position of the raw material bar feeding port of the smelting chamber; the manipulator moves the raw material rod set to the rod chuck from the conveying belt, the upper end of the raw material rod set is clamped in the second clamping groove, and the feeding motor rotates the raw material rod set to move downwards.
6. An aerosolization apparatus for efficient in-line continuous production in accordance with claim 5, wherein: each raw material rod group comprises a raw material rod, a bar suspension bolt, a bar connecting bolt and a stub bar; each raw material rod is vertically arranged, and the upper end and the lower end of each raw material rod are provided with internal thread holes with the same specification; the upper end of each bar hanging bolt is respectively matched with the second clamping groove of the bar chuck and the corresponding first clamping groove of the transmission belt, and the lower end of each bar hanging bolt is respectively fixed with the inner threaded hole corresponding to the upper end of the raw material bar in a threaded manner; each the equal vertical setting of bar connecting bolt, and the external screw thread of same specification is all seted up at its upper and lower both ends, each bar connecting bolt's upper end respectively with correspond the internal thread hole spiro union of feed rod lower extreme is fixed, and its upper end respectively with the second draw-in groove of bar chuck and the first draw-in groove phase-match of correspondence of transmission band, each bar connecting bolt's lower extreme respectively with correspond the upper end spiro union of stub bar is fixed, and each the stub bar is the remaining stub bar after the feed rod gas atomization.
7. An aerosolization apparatus for efficient in-line continuous production according to claim 6, wherein: the nominal diameter of the thread in each raw material rod group is 8-30 mm.
8. An aerosolization apparatus for efficient in-line continuous production according to claim 6, wherein: one end of the second argon pipeline extends into the stub bar recovery bin and cools the corresponding stub bar; the argon gas pipeline that leads to of second still equipartition interval intercommunication is equipped with the several spray tube on extending the partial pipeline in feed head recovery storehouse, the quantity of spray tube is 2~6, and each the end of spray tube all with correspond distance between the stub bar is 20~100 mm.
9. An aerosolization apparatus for efficient in-line continuous production in accordance with claim 8, wherein: the argon gas spraying pressure of each spraying pipe is 0.3-1.5 MPa, and the flow rate is 0.5-3 m/min.
10. The gas atomization method for the gas atomization device for the efficient online continuous production according to any one of claims 1 to 9, characterized by comprising the steps of:
the method comprises the following steps: machining the raw material rod, wherein the upper end and the lower end of the raw material rod are both provided with internal thread holes with the same specification; then screwing a bar suspension bolt into the internal thread hole at the upper end of the raw material bar, screwing the upper end of a bar connecting bolt into the internal thread hole at the lower end of the raw material bar, screwing the lower end of the bar connecting bolt into a stub bar, and assembling into a raw material bar group;
step two: placing the assembled raw material rod group on a conveying belt in a raw material pre-loading bin, enabling the upper end of a rod hanging bolt to be in contact with a first clamping groove of the conveying belt, then opening a first bin door and a second bin door, vacuumizing three bins, and filling argon until the air pressure is 101kPa after the vacuum degree reaches 0.5-2 Pa;
step three: the raw material rod group is moved to a working bin through a conveying belt, a first bin gate and a second bin gate are closed, the raw material rod group is moved to a rod chuck through a manipulator, and the verticality of the raw material rod group is guaranteed; then starting a feeding motor to enable the raw material rod group to rotate and move downwards, and carrying out a smelting atomization process by matching with high-frequency electricity and high-pressure argon; vacuumizing and breaking the space of the raw material pre-loading bin to prevent argon gas leakage while smelting and atomizing the working bin, and vacuumizing and replacing argon gas in the raw material pre-loading bin after replacing a new raw material rod set;
step four: after smelting and atomization are completed, the manipulator moves the stub bar from the bar chuck to the conveying belt, so that the upper end of the bar connecting bolt is in contact with the first clamping groove of the conveying belt; then opening the first bin gate and the second bin gate, rotating the conveying belt, moving a new raw material rod group from the raw material pre-loading bin to the working bin, and simultaneously moving the stub bar from the working bin to the stub bar recovery bin;
step five: closing the first bin gate and the second bin gate, replacing the raw material pre-loading bin with a new raw material rod group again, and performing vacuumizing and argon replacement operation; meanwhile, a feed motor is started in the working bin to move the corresponding raw material rod group to a smelting chamber for smelting and atomization; and the stub bar recovery bin starts to be vacuumized, and an argon pipeline is opened to cool the stub bar, so that the synchronous feeding, atomizing and cooling are realized.
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| Publication number | Priority date | Publication date | Assignee | Title |
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