CN112008085A - Universal part preheating device and preheating method thereof - Google Patents
Universal part preheating device and preheating method thereof Download PDFInfo
- Publication number
- CN112008085A CN112008085A CN202010770490.9A CN202010770490A CN112008085A CN 112008085 A CN112008085 A CN 112008085A CN 202010770490 A CN202010770490 A CN 202010770490A CN 112008085 A CN112008085 A CN 112008085A
- Authority
- CN
- China
- Prior art keywords
- workpiece
- coil
- coils
- alternating current
- preheating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
-
- 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
- B33Y40/10—Pre-treatment
-
- 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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
- B22F2007/068—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts repairing articles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- General Induction Heating (AREA)
Abstract
The invention discloses a universal part preheating device which comprises a forming cylinder, wherein a Z-axis lifting device is arranged below the forming cylinder, the upper part of the Z-axis lifting device is positioned in the forming cylinder, the upper surface of the lifting device is connected with a base material, the base material is connected with a workpiece, a plurality of coils which are matched with the outer contour of the workpiece are sleeved on the workpiece from top to bottom, an alternating current power supply interface is arranged on the forming cylinder, the coils are respectively connected with the alternating current power supply interface to form an electric loop, and backfill powder is filled above the base material in the forming cylinder. The universal part preheating device solves the problems that internal stress is easy to generate in the non-preheating repair process and induction heating preheating is uneven in the prior art. The invention also discloses a universal part preheating method.
Description
Technical Field
The invention belongs to the technical field of 3D printing equipment, relates to a universal part preheating device and further relates to a preheating method adopting the universal part preheating device.
Background
The metal 3D forming technology realizes the forming processing of parts by adding materials, and can quickly, directly and accurately convert the design idea into a physical model with certain functions. The performance of the machined part can replace the traditional machined part; the method can shorten the product design and manufacturing period, improve the enterprise competitiveness and enhance the enterprise profitability, and establishes a brand-new product development mode for design developers of industrial products. Compared with the traditional processing method, the metal 3D forming technology can form parts in any complex shape, and the mechanical property of the formed parts is superior to that of the parts processed in the traditional mode. At present, the 3D metal forming technology is various, such as SLM, LSF, EBM and the like, SLM equipment is mainly used for forming parts, and heating wires are arranged below base materials of the SLM equipment and used for reducing the cracking phenomenon caused by internal stress during forming; LSF and EBM can also be used for part forming, but are often used for part repair because their forming quality is not as good as SLM equipment.
The existing part repairing process is not preheated, the temperature difference of two sides of a repairing surface of the part is large, internal stress is easily generated, the combination between the repairing surface of the part and a first layer of forming surface is influenced, the performance of a repairing part of the part is influenced, and the risk of cracking exists. The existing induction heating usually adopts a single coil and directly adopts out-of-cylinder heating, which causes uneven preheating of different parts.
Disclosure of Invention
The invention aims to provide a universal part preheating device, which solves the problems that internal stress is easy to generate and induction heating preheating is uneven in the non-preheating repair process in the prior art.
Another object of the present invention is to provide a general part preheating method.
The invention adopts the technical scheme that the universal part preheating device comprises a forming cylinder, wherein a Z-axis lifting device is arranged below the forming cylinder, the upper part of the Z-axis lifting device is positioned in the forming cylinder, the upper surface of the lifting device is connected with a base material, the base material is connected with a workpiece, a plurality of coils which are matched with the outer contour of the workpiece are sleeved on the workpiece from top to bottom, an alternating current power supply interface is arranged on the forming cylinder, the coils are respectively connected with the alternating current power supply interface to form an electric loop, and backfill powder is filled above the base material in the forming cylinder.
The first aspect of the present invention is also characterized in that,
a gap exists between the inner side of the coil and the corresponding position of the workpiece.
The plurality of coils are fixed at different heights on the workpiece by the filling of the backfill powder.
The backfill powder is metal powder.
The plurality of coils are respectively connected with the alternating current power supply interface through wires to form an electric loop, and the length of the wire connected with the alternating current power supply interface of each coil is larger than the moving stroke of each coil when the Z-axis lifting device is lifted.
The alternating current power supply interface is arranged as an alternating current guide rail, one side of each coil, which is close to the alternating current guide rail, is provided with an opening, two sides of each opening are respectively connected with conducting strips, and the two conducting strips are respectively connected with two electrode ends of the alternating current guide rail.
The gaps between the plurality of coils and the outer contour at the corresponding workpiece are equal.
Two adjacent coils are arranged in parallel and distributed at equal intervals in the vertical direction or distributed in a regular gradient manner or in an irregular manner.
The other technical scheme adopted by the invention is that a universal part preheating method adopts the universal part preheating device, and is implemented according to the following steps:
step 2, preparing coils according to the number and the arrangement positions selected in the step 1 and the outer contour shape of the preheated workpiece, so that each coil is the same as the outer contour shape of the corresponding workpiece;
step 3, sequentially sleeving the prepared coils on the outer contour corresponding to the workpiece from bottom to top, filling backfill powder into the forming cylinder to the height of the current coil by each coil, and then connecting the current coil with an alternating current power supply interface to form an electric loop until all the coils are completely installed;
and 4, alternating current is conducted to the alternating current power supply interface, the Z-axis lifting device is electrified, the Z-axis lifting device is lifted, the coil and the workpiece are lifted along with the Z-axis lifting device, and the alternating current power supply generates an alternating magnetic field around the workpiece through the coil, so that the workpiece generates eddy current to realize heating.
When the coils are sleeved in the step 3, two adjacent coils are arranged in parallel and distributed at equal intervals in the vertical direction or distributed in a regular gradient manner or in an irregular manner.
The invention has the beneficial effects that:
according to the invention, the in-cylinder heating is adopted, the repaired part is preheated through the coil, so that the part is uniformly heated, the internal stress generated by temperature difference in the part repairing process is avoided, the cracking problem of the repaired part is reduced, the repairing and forming quality of the part is improved, and the method is suitable for repairing or repairing the part and brings benefits to customers.
Drawings
FIG. 1 is a schematic diagram of a general part preheating apparatus according to the present invention;
fig. 2 is a top view of fig. 1.
In the figure, 1, a Z-axis lifting device, 2, a cooling plate, 3, a base material, 4, a forming cylinder, 5, a workpiece, 6, backfill powder, 7, a forming chamber, 8, an alternating current power supply interface and 9, a coil;
8-1, AC guide rail, 8-2, opening, 8-3, conducting plate.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses a universal part preheating device, which is structurally shown in figures 1-2 and comprises a forming cylinder 4, wherein a Z-axis lifting device 1 is arranged below the forming cylinder 4, the upper part of the Z-axis lifting device 1 is positioned in the forming cylinder 4, the upper surface of the lifting device 1 is connected with a substrate 3, the substrate 3 is connected with a workpiece 5, a plurality of coils 9 which are matched with the outer contour of the workpiece 5 are sleeved on the workpiece 5 from top to bottom, an alternating current power supply interface 8 is arranged on the forming cylinder 4, the plurality of coils 9 are respectively connected with the alternating current power supply interface 8 to form an electric loop, and backfill powder 6 is filled above the substrate 3 in the forming cylinder 4.
A gap exists between the inner side of the coil 9 and the corresponding position of the workpiece 5.
A cooling plate 2 is connected between the upper surface of the Z-axis lifting device 1 and the base material 3.
A forming chamber 7 is also arranged above the forming cylinder 4.
A plurality of coils 9 are fixed at different heights on the workpiece 5 by the filling of the backfill powder 6.
The backfill powder 6 is a metal powder.
The plurality of coils 9 are respectively connected with the alternating current power supply interface 8 through leads to form an electric loop, and the length of the lead for connecting each coil 9 with the alternating current power supply interface 8 is larger than the moving stroke of each coil 9 when the Z-axis lifting device 1 is lifted.
The alternating current power supply interface 8 is set as an alternating current guide rail 8-1, one side of each coil 9, which is close to the alternating current guide rail 8-1, is provided with an opening 8-2, two sides of each opening 8-2 are respectively connected with a conducting strip 8-3, and the two conducting strips 8-3 are respectively connected with two electrode ends of the alternating current guide rail 8-1.
The gaps between the plurality of coils 9 and the outer contour at the corresponding workpiece 5 are equal.
Two adjacent coils 9 are arranged in parallel and distributed at equal intervals in the vertical direction or distributed in a regular gradient or irregular distribution.
The working principle of the universal part preheating device is as follows:
a cooling plate 2 is added in a Z-axis lifting device 1 below a base material 3 of the SLM equipment, a workpiece 5 is connected on the base material 3, then the base material is connected on the Z-axis lifting device 1, in the backfilling process of backfilling powder 6, a plurality of coils 9 having the same cross section as the workpiece 5 are placed at different heights of the workpiece 5 and cannot be in contact with the workpiece, the coils 9 are fixed by compacting the backfill powder 6, since the backfill powder 6 is electrically non-conductive, it also acts as an insulator between the workpiece 5 and the coil 9, then, by connecting the coil 9 to the AC power supply interface 8 on the forming cylinder 4, the connected coil 9 can be lifted and lowered along with the Z-axis lifting device 11, and in the lifting process, the coil 9 is always connected with the power interface 8 to form a loop, and the alternating current power supply generates an alternating magnetic field around the workpiece through the coil 9, so that the workpiece generates eddy current to realize heating.
The conducting strips 8-3 on both sides of each coil 9 slide in the alternating current guide rails 8-1, and the two electrode ends of the alternating current guide rails 8-1 are respectively connected to form an electric loop formed between each coil 9 and the alternating current power supply interface 8.
The invention discloses a universal part preheating method, which is implemented by adopting the universal part preheating device according to the following steps:
step 2, preparing coils 9 according to the number and the arrangement positions selected in the step 1 and the outer contour shape of the preheated workpiece 5, so that each coil 9 has the same outer contour shape as the corresponding workpiece 5;
step 3, sequentially sleeving the prepared coils 9 on the outer contour corresponding to the workpiece 5 from bottom to top, filling backfill powder 6 into the forming cylinder 4 to the height of the current coil 9 by using each set of coil 9, and then connecting the current coil 9 with the alternating current power supply interface 8 to form an electric loop until all the coils 9 are completely installed;
and 4, electrifying alternating current to the alternating current power supply interface 8, electrifying the Z-axis lifting device 1, lifting the coil 9 and the workpiece 5 along with the Z-axis lifting device 1, and generating an alternating magnetic field around the workpiece 5 by the alternating current power supply through the coil 9 so as to enable the workpiece 5 to generate eddy current to realize heating.
When the coils 9 are sleeved in the step 3, two adjacent coils 9 are arranged in parallel and distributed at equal intervals in the vertical direction or distributed in a regular gradient manner or in an irregular manner.
According to the invention, the coil 9 can be made into different shapes according to different heating objects, then the coil 9 is connected with the alternating current power supply interface 8, the alternating current power supply interface 8 provides alternating current for the coil 9, the alternating current of the coil 9 generates an alternating magnetic field passing through the workpiece, and the magnetic field enables the workpiece 5 to generate eddy current for heating.
According to the invention, the coil 9 with different shapes (the same as the section of the part) is used for preheating the repaired part, so that the temperature of the section is uniform when the repaired part is heated, and the generation of internal stress is avoided; the different heights of the parts are heated in sections through the coils, so that the repaired parts are uniformly heated.
Claims (10)
1. The utility model provides a general part preheating device, its characterized in that, includes forming cylinder (4), forming cylinder (4) below is provided with Z axle elevating gear (1), Z axle elevating gear (1) top is located forming cylinder (4), elevating gear (1) upper surface is connected with substrate (3), be connected with work piece (5) on substrate (3), work piece (5) are gone up by last to the lower cover be equipped with a plurality of coils (9) that suit rather than the outline, be provided with alternating current power source interface (8) on forming cylinder (4), it is a plurality of coil (9) respectively with alternating current power source interface (8) are connected and are formed electric circuit, it has backfill powder (6) to lie in substrate (3) top packing in forming cylinder (4).
2. A universal preheating device for parts according to claim 1, characterized in that there is a gap between the inner side of the coil (9) and the corresponding position of the workpiece (5).
3. A universal parts preheating device according to claim 1, characterized in that the plurality of coils (9) are fixed at different heights of the workpiece (5) by filling with backfill powder (6).
4. A universal parts preheating device according to claim 3, characterized in that the backfill powder (6) is a metal powder.
5. A general preheating device for parts according to claim 1, wherein a plurality of the coils (9) are respectively connected with the ac power supply interface (8) through wires and form an electric circuit, and the length of the wire connecting each coil (9) with the ac power supply interface (8) is greater than the moving stroke of each coil (9) when the Z-axis lifting device (1) is lifted.
6. A universal preheating device for parts according to claim 1, wherein the ac power supply interface (8) is configured as an ac power rail (8-1), an opening (8-2) is provided on one side of each coil (9) close to the ac power rail (8-1), conductive strips (8-3) are respectively connected to two sides of the opening (8-2), and two conductive strips (8-3) are respectively connected to two electrode terminals of the ac power rail (8-1).
7. A universal part preheating arrangement according to claim 2, characterized in that the gaps between the plurality of coils (9) and the outer contour at the corresponding workpiece (5) are equal.
8. A universal preheating device for parts according to claim 2, characterized in that two adjacent coils (9) are arranged in parallel and are distributed at equal intervals in the vertical direction or in a regular gradient or irregular distribution.
9. A general part preheating method, which is characterized by adopting the general part preheating device of claim 1, and is implemented by the following steps:
step 1, selecting proper arrangement positions and number of coils (9) according to the outer contour shape of a workpiece (5) to be preheated;
step 2, preparing coils (9) according to the number and the arrangement positions selected in the step 1 and the outer contour shape of the preheated workpiece (5), so that each coil (9) is the same as the outer contour shape of the corresponding workpiece (5);
step 3, sequentially sleeving the prepared coils (9) at the outer contour corresponding to the workpiece (5) from bottom to top, filling backfill powder (6) into the forming cylinder (4) to the height of the current coil (9) by each set of coil (9), and then connecting the current coil (9) with the alternating current power supply interface (8) to form an electric loop until all the coils (9) are completely installed;
and 4, alternating current is supplied to the alternating current power supply interface (8), the Z-axis lifting device (1) is electrified, the Z-axis lifting device (1) is lifted, the coil (9) and the workpiece (5) are lifted along with the Z-axis lifting device (1), and the alternating current power supply generates an alternating magnetic field around the workpiece (5) through the coil (9), so that the workpiece (5) generates eddy current to realize heating.
10. A general method for preheating parts according to claim 9, wherein when the coils (9) are sleeved in the step 3, two adjacent coils (9) are arranged in parallel and are distributed at equal intervals in the vertical direction or in a regular gradient or irregular distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010770490.9A CN112008085B (en) | 2020-08-04 | 2020-08-04 | Universal part preheating device and preheating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010770490.9A CN112008085B (en) | 2020-08-04 | 2020-08-04 | Universal part preheating device and preheating method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112008085A true CN112008085A (en) | 2020-12-01 |
| CN112008085B CN112008085B (en) | 2023-09-05 |
Family
ID=73500069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010770490.9A Active CN112008085B (en) | 2020-08-04 | 2020-08-04 | Universal part preheating device and preheating method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112008085B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4788394A (en) * | 1985-03-06 | 1988-11-29 | N.V. Bekaert S.A. | Multi-wire induction heating |
| CN101125394A (en) * | 2007-06-13 | 2008-02-20 | 华中科技大学 | Automatic powder feeding laser induction composite coating method and device |
| CN103100713A (en) * | 2013-01-23 | 2013-05-15 | 西安铂力特激光成形技术有限公司 | Preheat device and preheat method of selective laser selection area melting subscriber loop multiplex (SLM) equipment powder feeding barrel |
| DE102012012344A1 (en) * | 2012-03-21 | 2013-09-26 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for manufacturing workpiece e.g. three-dimensional object, involves preheating material adjacent to storage chamber located in process chamber before removing stock material from chamber and transferring to process chamber |
| JP2018003087A (en) * | 2016-06-30 | 2018-01-11 | キヤノン株式会社 | Three-dimensional molding apparatus, and method for manufacturing three-dimensionally molded article |
| CN109822091A (en) * | 2019-03-01 | 2019-05-31 | 西安科技大学 | The molding rapid molding device of close said magnetic powder material adsorption plane and method |
| CN212634320U (en) * | 2020-08-04 | 2021-03-02 | 西安铂力特增材技术股份有限公司 | Universal part preheating device |
-
2020
- 2020-08-04 CN CN202010770490.9A patent/CN112008085B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4788394A (en) * | 1985-03-06 | 1988-11-29 | N.V. Bekaert S.A. | Multi-wire induction heating |
| CN101125394A (en) * | 2007-06-13 | 2008-02-20 | 华中科技大学 | Automatic powder feeding laser induction composite coating method and device |
| DE102012012344A1 (en) * | 2012-03-21 | 2013-09-26 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for manufacturing workpiece e.g. three-dimensional object, involves preheating material adjacent to storage chamber located in process chamber before removing stock material from chamber and transferring to process chamber |
| CN103100713A (en) * | 2013-01-23 | 2013-05-15 | 西安铂力特激光成形技术有限公司 | Preheat device and preheat method of selective laser selection area melting subscriber loop multiplex (SLM) equipment powder feeding barrel |
| JP2018003087A (en) * | 2016-06-30 | 2018-01-11 | キヤノン株式会社 | Three-dimensional molding apparatus, and method for manufacturing three-dimensionally molded article |
| CN109822091A (en) * | 2019-03-01 | 2019-05-31 | 西安科技大学 | The molding rapid molding device of close said magnetic powder material adsorption plane and method |
| CN212634320U (en) * | 2020-08-04 | 2021-03-02 | 西安铂力特增材技术股份有限公司 | Universal part preheating device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112008085B (en) | 2023-09-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4712091B2 (en) | Equipment that deforms materials by induction heating | |
| KR101006299B1 (en) | Heating unit, tire heating device, and tire mold modifying method | |
| CN212634320U (en) | Universal part preheating device | |
| Bui et al. | Modeling a working coil coupled with magnetic flux concentrators for barrel induction heating in an injection molding machine | |
| US20120025428A1 (en) | Device for transforming materials by induction heating | |
| CN113709994B (en) | Production equipment and method for forming conducting layer on resistance welding surface of circuit board | |
| CN106903311A (en) | A kind of electromagnetic induction selective laser fusing powder bed on-line heating system and method | |
| CN104475587A (en) | Conduction heating forming device and method | |
| CN112008085B (en) | Universal part preheating device and preheating method thereof | |
| CN204565022U (en) | The all solid state variable frequency induction heater of isothermal forging upper/lower die | |
| CN108284146A (en) | The electromagnetism progressive molding system and method for aluminum alloy curved part local induction heating | |
| CN102142746A (en) | Insulation process of motor stator punching sheet for electric vehicle | |
| CN212885032U (en) | 3D printing device for parts needing high-temperature preheating | |
| CN109865768A (en) | Device and method for forming aluminium sheet | |
| CN219214167U (en) | Electromagnetic induction heating coil plate and equipment for hot plate of tire vulcanizer | |
| CN104427669A (en) | Method and device for heating work pieces through electromagnetic induction | |
| CN104690204B (en) | Isothermal forging upper/lower die all solid state variable frequency induction heater and heating means | |
| CN210427747U (en) | Magnetic flux leakage simulation device for stator bar of equivalent overlapping variable-slot-height large alternating-current motor | |
| CN113597036A (en) | Low-cost uniform heating device for motor heat jacket | |
| US20190289682A1 (en) | Inductors and inductor extraction assemblies | |
| CN203091952U (en) | Alloyed powder moisture-proof conveying device used for plasma spray welding of glass mold | |
| CN218080850U (en) | Glasses plate brazing device | |
| CN213672377U (en) | High frequency welding equipment and prevent mechanism that splashes thereof | |
| CN214161032U (en) | Electromagnetic forming device based on multiple coils | |
| Taghilou et al. | Comparative Study of Shield Placement to Mitigate the Stray Loss of Power Transformers Based on 3D-FEM Simulation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |