CN111408672A - ICP plasma wire feeding and straightening mechanism - Google Patents
ICP plasma wire feeding and straightening mechanism Download PDFInfo
- Publication number
- CN111408672A CN111408672A CN202010289507.9A CN202010289507A CN111408672A CN 111408672 A CN111408672 A CN 111408672A CN 202010289507 A CN202010289507 A CN 202010289507A CN 111408672 A CN111408672 A CN 111408672A
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- Prior art keywords
- wire
- section
- raw material
- wire feeding
- rotating
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- 239000002994 raw material Substances 0.000 claims abstract description 41
- 229910052751 metal Inorganic materials 0.000 claims abstract description 30
- 239000002184 metal Substances 0.000 claims abstract description 30
- 238000003860 storage Methods 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 230000006978 adaptation Effects 0.000 claims abstract description 3
- 238000003825 pressing Methods 0.000 claims description 32
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract description 3
- 238000010146 3D printing Methods 0.000 abstract description 2
- 238000009272 plasma gasification Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F1/00—Bending wire other than coiling; Straightening wire
- B21F1/02—Straightening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F23/00—Feeding wire in wire-working machines or apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Wire Processing (AREA)
Abstract
The invention discloses an ICP plasma wire feeding and straightening mechanism, and relates to the technical field of metal 3D printing raw material processing. The wire feeder is used for carrying out primary alignment on raw material metal wires in the wire storage piece, then downwards feeding the raw material metal wires into the middle pipe for secondary alignment, and gasifying the raw material metal wires through the plasma torch pipe; wire drive feed unit is including rotating a plurality of pairs of pinch rollers of connecting on the organism, and every pair of pinch roller is located the both sides of raw materials wire respectively, and the wear-resisting cover can be dismantled and be connected with in the pinch roller periphery, offers the recess of round and raw materials wire looks adaptation on the wear-resisting cover outer peripheral face. The method has the advantages that the form of the wire in the production process is maintained, the bending degree of the wire in a plasma gasification area is reduced, the wire straightening effect is realized, the wire is maintained in a plasma high-temperature area, raw materials are fully gasified, and wires of different specifications can obtain an ideal straightening effect by replacing wear-resistant sleeves.
Description
Technical Field
The invention relates to the technical field of metal 3D printing raw material processing, in particular to an ICP plasma wire feeding straightening mechanism.
Background
The disc-shaped wire is in a bent state during wire feeding, and easily contacts a plasma torch tube in an ICP powder making process, so that the phenomenon of head explosion occurs; in the prior art, the wire feeding and the plasma torch tube are in a non-concentric state, the wire feeding enters from the side surface of the plasma torch tube, and a heating area with a large range is formed by three groups of plasma torch heads, so that the bending influence of wires is compensated to a certain degree. However, the three groups of plasma torches enlarge the heating area, the titanium wire still cannot be gasified when being bent, the wire material drops in the form of a whole section, raw materials are wasted, and the production efficiency is reduced.
Disclosure of Invention
The invention aims to provide an ICP plasma wire feeding straightening mechanism which can maintain the shape of a wire in the production process, reduce the bending degree of the wire in a plasma gasification region, play a role in straightening the wire, maintain the wire in a plasma high-temperature region, fully gasify raw materials, and replace wear-resistant sleeves for wires of different specifications to obtain an ideal straightening effect.
The technical purpose of the invention is realized by the following technical scheme:
an ICP plasma wire feeding straightening mechanism comprises a machine body, wherein a wire feeding device and a centering tube are arranged on the machine body, the wire feeding device comprises a wire storage piece, a plasma torch tube concentric with the centering tube is arranged below the centering tube, a raw material metal wire in the wire storage piece is downwards fed into the centering tube to be subjected to secondary straightening after being subjected to primary straightening by the wire feeding device, and then is gasified by the plasma torch tube;
the wire feeding device comprises a plurality of pairs of pressing wheels which are rotatably connected to the machine body, each pair of pressing wheels are respectively positioned on two sides of the raw material metal wire, at least one pressing wheel is driven to rotate by a motor, the periphery of the pressing wheel is detachably connected with a wear-resistant sleeve, and the peripheral surface of the wear-resistant sleeve is provided with a groove matched with the raw material metal wire.
Furthermore, the rotating shaft of the pressing wheel is connected to the machine body in a sliding mode, the sliding direction of the pressing wheel faces the direction far away from the raw material metal wire, a fixing piece is further arranged on the pressing wheel, and the pressing wheel is fixed at the position, close to one end of the raw material metal wire, of the fixing piece.
Furthermore, the fixing part comprises a fixing plate, fixing holes are formed in two ends of the fixing plate, and the outer ends of the rotating shafts of the corresponding pair of pressing wheels are respectively inserted into the corresponding fixing holes.
Furthermore, the outer end of the pinch roller rotating shaft is provided with an upward bulge.
Furthermore, two upward protrusions are arranged on the same pressing wheel rotating shaft, and the distance between the two protrusions is not smaller than the thickness of the fixing plate.
Furthermore, the sliding path of the pinch roller rotating shaft comprises a working section, and the height of the working section is increased or unchanged towards the direction far away from the raw material metal wire.
Furthermore, one end of the working section, which is far away from the raw material metal wire, is also communicated with a replacing section, and the height of the replacing section is gradually reduced or unchanged towards the direction of the working section, which is far away from the raw material metal wire.
Furthermore, the wire feeding devices comprise N wire feeding devices, a working position of each wire feeding device is arranged right above the middle pipe, and the machine body is connected with a switching piece for sequentially switching the wire feeding devices to the working position.
Further, it includes vertical dwang to switch the piece, the dwang includes the rotation section of top and the fixed section of below, and the rotation section is the circle axle, and the fixed section is the regular prism section, rotates the section diameter and is less than the external circle diameter of fixed section, is equipped with the rotation hole with the fixed section adaptation among the wire drive feed unit, wire drive feed unit revolutes the rotation pole evenly distributed, and the fixed section limit is M, and M is the integer multiple and M of N not less than 2.
Furthermore, a fixing nut is connected to the upper portion of the rotating section in a threaded mode and abuts against the upper portion of the wire feeding device.
In conclusion, the invention has the following beneficial effects:
1. the wire straightening function can be achieved through the wire feeding device, the ICP plasma centering requirement is met, and the phenomenon of head explosion is avoided;
2. three plasma torches are originally needed to enlarge a heating area, so that cost waste is caused, raw material waste is reduced by straightening through a wire feeding device, and production efficiency is improved;
3. the wear-resistant sleeve can be replaced according to wires of different sizes, so that the service life and the universality of the device are improved;
4. the process of replacing the wear-resistant sleeve is convenient, the operation is convenient, and the working efficiency is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of a pressure roller group portion in embodiment 1 of the present invention;
FIG. 3 is a schematic structural diagram of a single pressing wheel in embodiment 1 of the present invention;
fig. 4 is a schematic view of the overall structure of embodiment 2 of the present invention.
In the figure, 1, a wire feeder; 11. a wire storage part; 2. aligning the middle pipe; 22. a pinch roller; 221. a wear-resistant sleeve; 222. a fixing plate; 223. a protrusion; 224. a working section; 225. replacing the section; 31. a rotating section; 32. a fixed section; 33. fixing a nut; 4. a plasma torch tube.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings, and the present embodiment is not to be construed as limiting the invention.
Example 1:
an ICP plasma wire feeding straightening mechanism is shown in figure 1 and comprises a machine body, wherein a wire feeding device and a middle butt pipe are arranged on the machine body, the wire feeding device comprises a wire storage part, and the wire storage part is a wire feeding disc which is rotatably connected to a machine body; the centering tube is a quartz tube and plays a role in straightening and centering, the upper end of the centering tube is connected below the wire feeding device, and the lower end of the centering tube is connected with a plasma torch tube concentric with the wire feeding device;
the wire feeder is used for feeding raw material metal wires wound on the wire feeding disc downwards into the middle pipe to be aligned for the second stage after the raw material metal wires are aligned for the first stage, the metal wires automatically pass through the plasma torch pipe under the cyclone action, so that the wire materials are maintained in a plasma high-temperature area, and raw materials are conveniently and fully gasified.
As shown in fig. 2 and 3, the wire feeding device comprises two pairs of pinch rollers rotatably connected to the machine body, each pair of pinch rollers is respectively positioned at two sides of the raw material metal wire, at least one pinch roller is driven to rotate by a motor, the periphery of the pinch roller is detachably connected with a wear-resistant sleeve, and the peripheral surface of the wear-resistant sleeve is provided with a circle of groove matched with the raw material metal wire.
In this embodiment, wear-resisting cover is fixed by hexagon socket head cap screw, through round gear intermeshing between every pair of pinch roller periphery, and a pinch roller of below still meshes with by motor drive pivoted driving gear mutually, and the driving gear is located this pinch roller below, drives this pinch roller through the motor and rotates.
As shown in fig. 2, the pressing wheel is rotatably connected to the rotating shaft through a bearing, the rotating shaft of the pressing wheel is connected to the machine body in a sliding manner, the sliding direction of the pressing wheel faces the direction far away from the raw material metal wire, a fixing part is further arranged on the pressing wheel, and the pressing wheel is fixed at the position, close to one end of the raw material metal wire, of the fixing part. In this embodiment, the body is provided with a sliding groove, and the rotating shaft is slidably connected in the sliding groove to limit a sliding path of the rotating shaft.
As shown in fig. 2, the fixing member includes a fixing plate, and an upward protrusion is provided at the outer end of the rotating shaft of the pressing wheel; two upward bulges are arranged on the same pressing wheel rotating shaft; fixing holes are formed in two ends of the fixing plate, the rotating shafts and the protrusions penetrate through the fixing holes, the outer ends of the rotating shafts of the corresponding pair of pressing wheels are respectively inserted into the corresponding fixing holes, and the distance between the two protrusions is not smaller than the thickness of the fixing plate. Under the action of gravity, the upper side of the fixing hole in the fixing plate is abutted between the two bulges, and the sliding of the pressing wheel is limited by the fixing plate, so that the position of the pressing wheel is conveniently fixed.
As shown in fig. 2, the sliding path (i.e., the sliding groove) of the rotating shaft of the pressing wheel comprises a working section, and the height of the working section is increased or unchanged towards the direction far away from the raw material metal wire; when the pressing wheels are positioned at the bottom end of the working section, each pair of pressing wheels are meshed with each other, the driving gear is meshed with the gear ring outside the corresponding pressing wheel, and the distance between the rotating shafts of each pair of pressing wheels is equal to the distance between the two fixing holes on the fixing plate; the end of the working section, which is far away from the raw material metal wire, is also communicated with a replacing section, and the height of the replacing section towards the direction of the far away from the raw material metal wire is gradually reduced or unchanged.
The working principle is as follows:
in the unwinding process of titanium wires serving as a production raw material, primary straightening is carried out through wire feeding pinch rollers, two groups of wire feeding pinch rollers are provided, and grooves with different sizes are formed for different wire sizes; a quartz tube for alignment and centering is additionally arranged between the wire feeding device and the plasma torch, and the wire is fed to the position above the flame by the quartz tube, so that the phenomenon that the wire is in contact with the plasma torch and a head is exploded is avoided. The upper and lower pinch rollers are provided with wear-resistant sleeves, and are replaced according to wires of different sizes and screwed by screws.
The wire straightening effect can be achieved, the ICP plasma centering requirement is met, and the phenomenon of head explosion is avoided; three plasma torches are originally needed to enlarge a heating area, so that cost waste is caused; the waste of raw materials is reduced through a straightening system, and the production efficiency is improved.
Example 2:
the structure principle of the present embodiment is substantially the same as that of embodiment 1, and the difference is that:
as shown in fig. 4, the number of the wire feeding devices is N, the wire feeding devices are uniformly distributed around the rotating rod, a working position of the wire feeding device is right above the middle pipe, and the machine body is connected with a switching piece for sequentially switching the wire feeding devices to the working position. So that the quick switching work can be conveniently carried out after the raw materials on the wire feeding disc are used up or wires of different sizes need to be replaced, and the working efficiency is improved.
The switching piece can be directly rotated and switched through the motor, in the embodiment, the switching piece comprises a vertical rotating rod, the rotating rod comprises a rotating section above and a fixing section below, the rotating section is a circular shaft, the fixing section is a regular prism section, the diameter of the rotating section is smaller than the diameter of an external circle of the fixing section, a rotating hole matched with the fixing section is formed in the wire feeding device, the number of the fixing section is M, and M is an integral multiple of N and not smaller than 2. In this embodiment, M =4 and N =2, i.e., the fixed segment is a regular quadrangular prism.
The wire feeding device is fixed on the fixed section by means of dead weight, and the wire feeding device is lifted upwards to the rotating section to be rotated and switched and then is placed down during switching. However, in order to further fix the position of the wire feeding device and prevent the device from being affected by vibration, a fixing nut is further connected above the rotating section in a threaded manner and abuts against the upper side of the wire feeding device.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides an ICP plasma send a coalignment to construct which characterized in that: the wire feeding device (1) comprises a wire storage part (11), a plasma torch pipe concentric with the wire storage part (2) is arranged below the centering pipe (2), and after the wire feeding device (1) conducts first-stage alignment on raw material metal wires in the wire storage part (11), the raw material metal wires are downwards sent into the centering pipe (2) to conduct second-stage alignment and then are gasified through the plasma torch pipe;
wire feeding unit (1) is including rotating a plurality of pairs of pinch rollers (22) of connecting on the organism, and every pair of pinch roller (22) is located the both sides of raw materials wire respectively, has at least one pinch roller (22) to rotate by motor drive, and pinch roller (22) periphery can be dismantled and be connected with wear-resisting cover (221), offers the recess of round and raw materials wire looks adaptation on wear-resisting cover (221) outer peripheral face.
2. An ICP plasma wire feed straightening mechanism according to claim 1, wherein: the rotating shaft of the pressing wheel (22) is connected to the machine body in a sliding mode, the sliding direction of the pressing wheel faces the direction far away from the raw material metal wire, a fixing piece is further arranged on the pressing wheel (22), and the pressing wheel (22) is fixed to the position, close to one end of the raw material metal wire, of the fixing piece.
3. An ICP plasma wire feed straightening mechanism according to claim 2, wherein: the fixing piece comprises a fixing plate (222), fixing holes are formed in two ends of the fixing plate (222), and the outer ends of the rotating shafts of the corresponding pair of pressing wheels (22) are respectively inserted into the corresponding fixing holes.
4. An ICP plasma wire feed straightening mechanism according to claim 3, wherein: the outer end of the rotating shaft of the pinch roller (22) is provided with an upward bulge (223).
5. An ICP plasma wire feed straightening mechanism according to claim 4, wherein: two upward bulges (223) on the rotating shaft of the same pressing wheel (22) are arranged, and the distance between the two bulges (223) is not less than the thickness of the fixing plate (222).
6. An ICP plasma wire feed straightening mechanism according to claim 1 or 3, wherein: the sliding path of the rotating shaft of the pinch roller (22) comprises a working section (224), and the height of the working section (224) is increased or unchanged towards the direction far away from the raw material metal wire.
7. An ICP plasma wire feed straightening mechanism according to claim 6, wherein: the end, far away from the raw material metal wire, of the working section (224) is also communicated with a replacing section (225), and the height of the replacing section (225) towards the direction far away from the raw material metal wire is gradually reduced or unchanged.
8. An ICP plasma wire feed straightening mechanism according to claim 1, wherein: wire feeding unit (1) is including N, to the work position that is wire feeding unit (1) directly over well pipe (2), is connected with on the organism and is used for switching wire feeding unit (1) to the switching piece of work position in proper order.
9. An ICP plasma wire feed straightening mechanism according to claim 8, wherein: the switching piece comprises a vertical rotating rod, the rotating rod comprises a rotating section (31) above and a fixed section (32) below, the rotating section (31) is a circular shaft, the fixed section (32) is a regular prism section, the diameter of the rotating section (31) is smaller than the diameter of an outer circle of the fixed section (32), a rotating hole matched with the fixed section (32) is formed in the wire feeding device (1), the wire feeding device (1) is uniformly distributed around the rotating rod, the number of the edges of the fixed section (32) is M, and the M is the integral multiple of N and is not smaller than 2.
10. An ICP plasma wire feed straightening mechanism according to claim 9, wherein: the upper portion of the rotating section (31) is in threaded connection with a fixing nut (33), and the fixing nut (33) abuts against the upper portion of the wire feeding device (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010289507.9A CN111408672A (en) | 2020-04-14 | 2020-04-14 | ICP plasma wire feeding and straightening mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010289507.9A CN111408672A (en) | 2020-04-14 | 2020-04-14 | ICP plasma wire feeding and straightening mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111408672A true CN111408672A (en) | 2020-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010289507.9A Pending CN111408672A (en) | 2020-04-14 | 2020-04-14 | ICP plasma wire feeding and straightening mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111408672A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116511513A (en) * | 2023-06-27 | 2023-08-01 | 陕西禾顺新材科技有限公司 | Preparation device and method of ferrotitanium alloy powder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4437600A (en) * | 1980-06-17 | 1984-03-20 | Veb Kombinat Polygraph "Werner Lamberz" Leipzig | Continuous wire feed arrangement for stapling apparatus |
| CN203635655U (en) * | 2013-12-11 | 2014-06-11 | 马鞍山市华科实业有限公司 | P-type pipe transverse extrusion die |
| CN204714420U (en) * | 2015-05-23 | 2015-10-21 | 山东莱芜煤矿机械有限公司 | A kind of shunting winch Steel cable pulley device |
| US20160016266A1 (en) * | 2014-07-17 | 2016-01-21 | Illinois Tool Works Inc. | Welding process wire feeder adapter |
| CN106735751A (en) * | 2016-12-30 | 2017-05-31 | 青岛卓思三维智造技术有限公司 | The automatic complement wire system and method in two cabins |
| CN206343743U (en) * | 2016-12-30 | 2017-07-21 | 青岛卓思三维智造技术有限公司 | A system is changed in double cabins |
| CN108031855A (en) * | 2018-01-17 | 2018-05-15 | 北京金物科技发展有限公司 | A kind of sensing heating and radio frequency plasma combined atomizing pulverized coal preparation system |
| CN110560699A (en) * | 2019-09-06 | 2019-12-13 | 西安交通大学 | wire feeding mechanism applied to metal wire electric explosion for preparing nano particles |
| CN110788152A (en) * | 2019-12-03 | 2020-02-14 | 无锡平盛科技有限公司 | Wire drawing machine convenient to reloading |
-
2020
- 2020-04-14 CN CN202010289507.9A patent/CN111408672A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4437600A (en) * | 1980-06-17 | 1984-03-20 | Veb Kombinat Polygraph "Werner Lamberz" Leipzig | Continuous wire feed arrangement for stapling apparatus |
| CN203635655U (en) * | 2013-12-11 | 2014-06-11 | 马鞍山市华科实业有限公司 | P-type pipe transverse extrusion die |
| US20160016266A1 (en) * | 2014-07-17 | 2016-01-21 | Illinois Tool Works Inc. | Welding process wire feeder adapter |
| CN204714420U (en) * | 2015-05-23 | 2015-10-21 | 山东莱芜煤矿机械有限公司 | A kind of shunting winch Steel cable pulley device |
| CN106735751A (en) * | 2016-12-30 | 2017-05-31 | 青岛卓思三维智造技术有限公司 | The automatic complement wire system and method in two cabins |
| CN206343743U (en) * | 2016-12-30 | 2017-07-21 | 青岛卓思三维智造技术有限公司 | A system is changed in double cabins |
| CN108031855A (en) * | 2018-01-17 | 2018-05-15 | 北京金物科技发展有限公司 | A kind of sensing heating and radio frequency plasma combined atomizing pulverized coal preparation system |
| CN110560699A (en) * | 2019-09-06 | 2019-12-13 | 西安交通大学 | wire feeding mechanism applied to metal wire electric explosion for preparing nano particles |
| CN110788152A (en) * | 2019-12-03 | 2020-02-14 | 无锡平盛科技有限公司 | Wire drawing machine convenient to reloading |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116511513A (en) * | 2023-06-27 | 2023-08-01 | 陕西禾顺新材科技有限公司 | Preparation device and method of ferrotitanium alloy powder |
| CN116511513B (en) * | 2023-06-27 | 2023-09-08 | 陕西禾顺新材科技有限公司 | Preparation device and method of ferrotitanium alloy powder |
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Application publication date: 20200714 |
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| RJ01 | Rejection of invention patent application after publication |