CN113172325B - Electromagnetic pulse welding process and equipment for electronic packaging - Google Patents
Electromagnetic pulse welding process and equipment for electronic packaging Download PDFInfo
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- CN113172325B CN113172325B CN202110559237.3A CN202110559237A CN113172325B CN 113172325 B CN113172325 B CN 113172325B CN 202110559237 A CN202110559237 A CN 202110559237A CN 113172325 B CN113172325 B CN 113172325B
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- magnetic
- magnetic field
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/06—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
Abstract
The invention discloses an electromagnetic pulse welding process and equipment for electronic packaging, which are used for solving the problems that a magnetic collector is easy to deform and short in service life, and can reduce the interference of a surrounding magnetic field on a coil magnetic field, and the electromagnetic pulse welding process comprises the following process flows: surface treatment, tooling preparation, welding, heat treatment, performance and quality inspection of a surface to be welded, wherein in the tooling preparation stage, the shape of a magnetic collector in electromagnetic pulse welding equipment needs to be trimmed, and possible deformation is corrected; the structure thereof comprises: the magnetic collector is positioned between the coil and a workpiece, a coil magnetic field is converged, local electromagnetic force is improved, an outer fixed ring is arranged at the edge of the magnetic collector and connected with the magnetic collector, deformation resistance is improved, a magnetic ring is arranged in the outer fixed ring, the magnetic field direction of the magnetic ring is the same as that of the coil magnetic field, and the influence of a peripheral magnetic field on the coil magnetic field can be reduced.
Description
Technical Field
The invention belongs to the technical field of welding, and particularly relates to an electromagnetic pulse welding process and electromagnetic pulse welding equipment for electronic packaging.
Background
Electromagnetic forming utilizes electromagnetic force to deform a metal blank, is a high-speed and high-energy material processing technology, has the forming speed of the electromagnetic forming as high as 50-300m/s, and has the biggest characteristics of high magnetic pressure, short continuous action time of the pressure and high workpiece deformation speed compared with the traditional metal forming technology. In addition, the forming system of electromagnetic forming is greatly different from the traditional forming method, the former workpiece is formed without a male die and only needs one female die, so the forming system is widely used in a plurality of fields, in the field of electronic packaging, because a plurality of welding parts are involved and a hot melting welding mode is mostly adopted, a large amount of thermal stress is easily accumulated in materials, the connection of flat plates in the electronic packaging is mostly realized by adhesion, the working environment temperature of electronic products is usually higher, the service life of an adhesive is reduced at high temperature so as to influence the connection stability, and the welding mode is easy to generate thermal deformation, so that the electromagnetic pulse welding without a large amount of high temperature in the welding process is widely used in the field of electronic packaging.
The principle of electromagnetic forming is as follows: the energy storage capacitor is charged through the variable voltage power supply, the high-voltage switch is turned off after the capacitor is full of the capacitor, the capacitor discharges to the working coil at the moment, strong pulse current, namely time-varying current, is generated in the working coil, the strong pulse current generates a strong pulse magnetic field around the coil, when a workpiece exists in the magnetic field around the coil, the changed magnetic field generates strong eddy current in the workpiece, and the workpiece with the eddy current receives strong pulse magnetic field force in the magnetic field to enable the workpiece to be subjected to plastic deformation.
Usually when using electromagnetic pulse welding, still need to set up the magnetic collector, concentrate the magnetic field that the coil produced through the magnetic collector, improve the result of use, but the thickness of magnetic collector is thinner, after processing into the disc structure, the intensity at its edge is showing to be reduced, receive the effect of electromagnetic force very easily to take place to warp during the use, still be provided with the slit on the magnetic collector in addition, the part around the slit takes place the deformation more easily, and the slit can not be blockked up or cancel, otherwise the magnetic collector will not play the effect of magnetic collection, and the slit size changes, also can influence the size of magnetic field force, consequently, in industrial production, need frequently change.
Disclosure of Invention
The invention aims to provide electromagnetic pulse welding equipment for electronic packaging, which can improve the strength of a magnetic collector, reduce deformation, stabilize the size of a slit and avoid the size change of the slit caused by stress.
In order to achieve the purpose, the following technical scheme is adopted in the application:
an electromagnetic pulse welding apparatus for electronic packaging, comprising: power, electric capacity, switch, coil, power with electric capacity, switch, coil intercommunication one-tenth current path, energy storage capacitor charges through the vary voltage power supply, treats that electric capacity is full of the back, closes high-voltage switch, and electric capacity discharges to work coil this moment, produces strong impulse current among the work coil, still includes: the magnetic collector is a circular table with a cylindrical through hole in the axis position, a slit is further arranged on the magnetic collector, and the projection direction of the slit on the bottom surface is arranged along the radial direction of the bottom surface of the magnetic collector;
the outer fixing ring includes: the ring pipe is an annular round pipe with the annular radius larger than that of the bottom surface of the magnetic collector, the ring pipe is positioned outside the magnetic collector, and the connecting rod is positioned between the ring pipe and the magnetic collector and is used for connecting the ring pipe with the edge of the magnetic collector.
Furthermore, at least two connecting rods are connected with the magnetic collector at different positions at the same position of the ring pipe, and an acute angle is formed between the two connecting rods.
Further, the hollow part of the ring pipe is provided with a magnetic ring.
Furthermore, a buffer material is filled in a gap between the magnetic ring and the ring pipe.
Further, still be provided with the support bar in the slit of magnetic collector, the support bar includes: the bar block is a straight strip, the thickness of the bar block is smaller than the size of the slit and is positioned on two sides of the slit, the clamping convex strips are arranged on one side of the bar block and matched with the shapes of the grooves correspondingly arranged on two sides of the slit, and the bar block is fixed on two sides of the slit through clamping matching;
the two insulating rods are in one group, the middle parts of the two insulating rods are hinged to form a shear type structure, four end points of the shear type structure are hinged to the bar blocks on the two sides of the slit respectively, and hinged blocks are arranged at the hinged positions of the insulating rods and the bar blocks.
Further, processing, frock preparation, welding, heat treatment, performance and quality inspection, its characterized in that: the equipment used in the welding step is the electromagnetic pulse welding equipment as claimed in claims 1-5.
Further, the shape of a magnetic collector in the electromagnetic pulse welding equipment is polished, and deformation generated in the previous processing is repaired.
The application has at least the following beneficial effects:
(1) the outer solid ring is arranged at the edge of the magnetic collector through the insulating connecting rod, the edge of the magnetic collector is supported, deformation is reduced, meanwhile, the insulating connecting rod can also avoid dispersing induced current, and normal use of the magnetic collector is not affected.
(2) The magnetic ring arranged in the outer fixed ring can also generate a magnetic field in the same direction as the coil, and the magnetic field of the coil is concentrated inwards under the action of the magnetic field of the magnetic ring, so that the magnetic collection effect is improved.
(3) The magnetic field that the outer solid ring produced is close to the magnetic field that the coil produced, because the magnetic force of magnetic ring is greater than the magnetic force in periphery magnetic field, the periphery magnetic field that originally can act on the coil magnetic field can offset with the magnetic field interact of magnetic ring to reduce the influence of periphery magnetic field to the coil magnetic field.
(4) The supporting bars are arranged in the slits, and the two sides of the slits are connected into a whole through the supporting bars, so that the strength of the slits is improved, and the slits are not easily deformed by pressure.
(5) The gap size between the support bars is adjustable, so that the support bars can be suitable for slits with different sizes, do not need to be frequently replaced in actual production, can be used by being adjusted in a short time, and is more convenient and efficient.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
FIG. 1 schematically illustrates a structural schematic of the present invention;
FIG. 2 is a schematic view showing a structure of a magnetic concentrator according to the present invention;
FIG. 3 is a schematic view of a top view of a magnetic concentrator;
fig. 4 schematically shows a partially enlarged view of a portion a in fig. 1;
FIG. 5 is a schematic view of the connection of the brace bars and the slots of the present invention;
FIG. 6 is a schematic view of the construction of the support bar of the present invention;
wherein the figures include the following reference numerals:
1-coil, 2-substrate, 3-magnetic concentrator, 31-bottom, 32-top, 33-slit;
41-connecting rod, 42-ring pipe, 43-magnetic ring;
51-bar block, 52-clamping convex strip, 53-hinge block and 54-insulating rod.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure; unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application; as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures; it will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
Examples
As shown in fig. 1, an electromagnetic pulse welding apparatus for electronic packaging is used for solving the problems that a magnetic collector 3 therein is easy to deform and has a short service life, and can reduce the interference of the surrounding magnetic field to the magnetic field of a coil 1, and the structure thereof comprises: the power supply connects the capacitor, the switch and the coil 1 into a current path, the energy storage capacitor is charged by the variable voltage power supply, the high voltage switch is closed after the capacitor is fully charged, the capacitor discharges to the working coil 1 at the moment, strong pulse current, namely time-varying current, is generated in the working coil 1, the strong pulse current generates a strong pulse magnetic field around the coil 1, when the substrate 2 exists in the magnetic field around the coil 1, the varied magnetic field generates strong eddy current in the substrate 2, and the substrate 2 with the eddy current receives strong pulse magnetic field force in the magnetic field, so that the substrate 2 is subjected to plastic deformation; the magnetic collector 3 is positioned between the coil 1 and the substrate 2, the magnetic field of the coil 1 is converged, the local electromagnetic force is improved, the edge of the magnetic collector 3 is provided with an outer fixed ring, the outer fixed ring is connected with the magnetic collector 3, the deformation resistance is improved, the outer fixed ring is internally provided with a magnetic ring 43, the magnetic field direction of the magnetic ring 43 is the same as that of the coil 1, and the influence of the peripheral magnetic field on the magnetic field of the coil 1 can be reduced.
As shown in fig. 2, the magnetic collector 3 is a circular truncated cone with a circular through hole at an axial position, the magnetic collector 3 is provided with a slit 33, and the slit 33 is arranged along the radial direction of the bottom surface 31 of the magnetic collector 3 in the projection direction of the bottom surface 31; the working principle of the magnetic collector 3 is that when the coil 1 passes through the instant current, eddy current can be induced in the magnetic collector 3, because the magnetic collector 3 is provided with a slit 33 along the radial direction, the current in the magnetic collector 3 is induced current flowing from the upper surface to the lower surface, the instant current in the magnetic collector 3 generates induced current in the sheet material, namely the eddy current, the magnetic field generated by the eddy current and the current of the coil 1 is linearly superposed, and is strengthened between the boss of the magnetic collector 3 and the sheet material to generate local strong magnetic field, so that the sheet material is deformed.
The outer fringe of magnetic collector 3 still is provided with outer solid ring, outer solid ring includes: the connecting rod 41 is positioned between the ring pipe 42 and the magnetic collector 3, the connecting rod 41 is a straight rod, the ring pipe 42 is connected with the edge of the magnetic collector 3, the force acting on the magnetic collector 3 can be transmitted to the ring pipe 42 through the connecting rod 41 and is borne by the ring pipe 42, the ring pipe 42 has higher strength relative to the magnetic collector 3 which is large in area and thin, therefore, the ring pipe 42 can support the magnetic collector 3, the deformation of the magnetic collector 3 is reduced, the ring pipe 42 is made of hard and brittle materials, the ductility is low, the ring pipe can be broken instead of deformed after being subjected to larger force, and the ring pipe 42 is replaced after being broken.
It should be noted that: the ring tube 42 is made of a polymer material that does not shield the magnetic field, and in this embodiment, a PVC material is used, so that the weight is relatively light, and the magnetic field of the magnetic ring 43 is not blocked excessively.
Further, as shown in fig. 3 to 4, at least two connecting rods 41 are connected to the same position of the ring tube 42, and an acute angle is formed between the two connecting rods 41.
A magnetic ring 43 is arranged in the hollow part of the ring tube 42, the magnetic ring 43 is a non-electromagnet, a magnetic field exists without being electrified, but the magnetic field intensity of the magnetic ring 43 is far smaller than the magnetic field intensity generated after the coil 1 is electrified, the magnetic field directions of the two magnetic fields are the same, as shown in fig. 1, arrows in the magnetic ring 43 represent magnetic induction lines for identifying the direction of the magnetic field force, the coil 1 is electrified to generate a magnetic field, the magnetic induction line directions of the magnetic ring 43 on the side close to the magnetic field of the coil 1 are all from bottom to top, the magnetic field of the magnetic ring 43 is smaller than the magnetic field of the coil 1, the magnetic field of the coil 1 is collected, and the magnetic field of the coil 1 is concentrated towards the inner side; in addition, since other magnetic fields, which are collectively referred to as peripheral magnetic fields, inevitably exist in the production environment, the peripheral magnetic fields may interfere with the magnetic field of the coil 1, and after the magnetic ring 43 is provided, the force originally acting on the magnetic field of the coil 1 directly acts on the magnetic field of the magnetic ring 43, which is equivalent to blocking the peripheral magnetic field with one magnetic field, thereby playing a role in purifying the peripheral magnetic field at the processing position.
Further, the magnetic ring 43 is disposed in the ring pipe 42, and a gap between the magnetic ring 43 and the ring pipe 42 is filled with a buffer material, such as sponge, so as to prevent the magnetic ring 43 from being damaged due to the force acting on the ring pipe 42 acting on the magnetic ring 43.
Still be provided with the support bar in magnetic collector 3's the slit 33, the support bar includes: the bar block 51 is a straight strip, the thickness of the bar block 51 is smaller than the size of the slit 33, when the bar block 51 is used, two bar blocks 51 are matched with each other, the clamping convex strip 52 is arranged on one side of the bar block 51 and correspondingly, grooves are correspondingly arranged on the magnetic collectors 3 on two sides of the slit 33, the clamping convex strip 52 is matched with the grooves to realize the detachable connection of the bar block 51 and the slit 33, the hinge block 53 is arranged on the other side of the bar block 51, the hinge block 53 is hinged with the insulating rod 54, as shown in fig. 5, the insulating rods 54 are grouped in pairs, the middle parts of the two insulating rods 54 are hinged to form a scissor-type structure, the two insulating rods 54 can rotate by taking the hinge position of the middle parts as a rotation center, and four end points of the scissor-type structure are respectively arranged on the hinge blocks 53 on two sides of the slit 33 to connect two sides of the slit 33, the size of the slit 33 can be ensured to be unchanged during use, and the strength of the slit 33 part is enhanced.
Further, the scissor structure is located in two hinged parts on the same bar 51, and the hinged part located at the higher position is detachably mounted on the bar 51, so that the position of the hinged part on the bar 51 can be changed, the distance between the two bars 51 can be adjusted, and the application range is improved.
It should be noted that the supporting bars are made of insulating materials, so that an induced current formed by a magnetic field on the magnetic collector 3 does not flow through the supporting bars, and the use of the magnetic collector 3 is not affected.
An electromagnetic pulse welding process for electronic packaging mainly comprises the following steps: surface treatment of the surface to be welded → tool preparation → welding → heat treatment → performance and quality inspection, wherein the material of the substrate 2 should have good conductivity and impact resistance; to facilitate the formation of the jet, an initial contact angle should be set.
The welding should be carried out immediately after the surface treatment, otherwise the welding difficulty is increased or even the welding is impossible because the adsorption layer and the oxidation layer are formed on the treated surface again.
In the preparation stage of the tool, the shape of the magnetic collector 3 in the electromagnetic pulse welding equipment needs to be modified, the magnetic collector 3 is acted by electromagnetic force, the weak part of the outer edge of the magnetic collector 3 is likely to deform, the magnetic collector 3 is supported by an outer fixed ring, and the outer fixed ring is fractured when the stress is too large, so that the fractured position of the outer fixed ring can be directly inspected, the deformation which is likely to occur is inspected while the outer fixed ring is replaced, and the efficiency is higher compared with that of directly inspecting the magnetic collector 3 by naked eyes; in addition, the support bars maintain the gaps of the slits 33, and as long as the connection of the support bars is not broken, the connection refers to the connection of the insulating rods 54 and the bar blocks 51 and the connection of the bar blocks 51 and the magnetic collectors 3, so that the size of the slits 33 is not changed, and the inspection efficiency is improved.
In the present embodiment, the coil, the power supply, the capacitor and the switch are well known in the art, and the connection manner between these elements is also commonly adopted by those skilled in the art, and therefore, will not be described in detail.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. An electromagnetic pulse welding apparatus for electronic packaging, comprising: power, electric capacity, switch, coil, power with electric capacity, switch, coil intercommunication one-tenth current path, energy storage capacitor charges through the vary voltage power supply, treats that electric capacity is full of the back, closes high-voltage switch, and electric capacity discharges to work coil this moment, produces strong impulse current, its characterized in that among the work coil: further comprising: the magnetic collector is a circular table with a cylindrical through hole in the axis position, a slit is further arranged on the magnetic collector, and the projection direction of the slit on the bottom surface is arranged along the radial direction of the bottom surface of the magnetic collector;
the outer fixing ring includes: the ring pipe is an annular round pipe with the annular radius larger than that of the bottom surface of the magnetic collector, the ring pipe is positioned outside the magnetic collector, and the connecting rod is positioned between the ring pipe and the magnetic collector and is used for connecting the ring pipe with the edge of the magnetic collector; at least two connecting rods are connected with the magnetic collector at different positions at the same position of the ring pipe, and an acute angle is formed between the two connecting rods; the hollow part of the ring pipe is provided with a magnetic ring.
2. An electromagnetic pulse welding apparatus for electronic packaging according to claim 1, wherein: and a buffer material is filled in a gap between the magnetic ring and the ring pipe.
3. An electromagnetic pulse welding apparatus for electronic packaging according to claim 1, wherein: still be provided with the support bar in the slit of collection magnetism ware, the support bar includes: the bar block is a straight strip, the thickness of the bar block is smaller than the size of the slit and is positioned on two sides of the slit, the clamping convex strips are arranged on one side of the bar block and matched with the shapes of the grooves correspondingly arranged on two sides of the slit, and the bar block is fixed on two sides of the slit through clamping matching;
the two insulating rods are in one group, the middle parts of the two insulating rods are hinged to form a shear type structure, four end points of the shear type structure are hinged to the bar blocks on the two sides of the slit respectively, and hinged blocks are arranged at the hinged positions of the insulating rods and the bar blocks.
4. An electromagnetic pulse welding process for electronic packaging sequentially comprises the following steps: treat surface treatment, frock preparation, welding, heat treatment, performance and the quality inspection of face, its characterized in that: the equipment used in the welding step is the electromagnetic pulse welding equipment as claimed in claims 1-3.
5. An electromagnetic pulse welding process for electronic packaging according to claim 4, characterized in that: and in the tool preparation stage, the shape of a magnetic collector in the electromagnetic pulse welding equipment is polished, and the deformation generated in the previous processing is repaired.
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| CN202110559237.3A CN113172325B (en) | 2021-05-21 | 2021-05-21 | Electromagnetic pulse welding process and equipment for electronic packaging |
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| CN202110559237.3A CN113172325B (en) | 2021-05-21 | 2021-05-21 | Electromagnetic pulse welding process and equipment for electronic packaging |
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| CN113172325B true CN113172325B (en) | 2022-05-13 |
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| CN114799170B (en) * | 2022-05-31 | 2024-02-13 | 智磁(重庆)科技有限责任公司 | Spiral groove type flat plate magnetic collector applied to electromagnetic pulse axial pressing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4456812A (en) * | 1982-07-30 | 1984-06-26 | Armco Inc. | Laser treatment of electrical steel |
| GB201207376D0 (en) * | 2011-04-28 | 2012-06-13 | Kek High Energy Accelerator | Magnetic shielding material for superconducting magnet |
| CN204183122U (en) * | 2014-08-04 | 2015-03-04 | 重庆市光学机械研究所 | Electromagnetic pulse welder collection chinaware |
| CN104625523A (en) * | 2015-02-13 | 2015-05-20 | 杭州焊林科技有限公司 | Double-seam automatic welder |
| CN106964897A (en) * | 2017-05-12 | 2017-07-21 | 东莞市力星激光科技有限公司 | Double annular pipe fitting circumference laser-beam welding machine and method |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2077090T5 (en) * | 1990-02-28 | 1999-04-16 | Kuroda Gauge Mfg | MANUFACTURING METHOD OF A CORE OF TILED SHEETS. |
| GB2356291B (en) * | 1999-11-13 | 2003-10-22 | Rolls Royce Plc | A workpiece clamping system |
| CN103924702B (en) * | 2014-04-01 | 2016-05-25 | 北京工业大学 | A kind of two sleeve pipe energy consumption inner core curvature-prevention support components with two yield points |
| CN104259296B (en) * | 2014-09-02 | 2016-04-13 | 西安交通大学 | A kind of metal bar materials in the tube blanking device of electromagnetic force load mode |
| CN104625314A (en) * | 2015-03-10 | 2015-05-20 | 四川大学 | Portable pipe cutting device based on crawling mechanism |
| CN205063259U (en) * | 2015-09-13 | 2016-03-02 | 鑫盛(湖州)塑木科技有限公司 | A quick -operation joint for plastic wood floor installation |
| CN206385824U (en) * | 2017-01-17 | 2017-08-08 | 大连理工大学 | A kind of old building remodeling lowering or hoisting gear |
| CN107123867B (en) * | 2017-06-05 | 2019-05-10 | 吉林省中赢高科技有限公司 | A kind of connector and its magnetic induction welding method of copper tip and aluminum conductor |
| CN107234303A (en) * | 2017-07-27 | 2017-10-10 | 苏州蓝王机床工具科技有限公司 | A kind of gear blank wheel clamping device on gear-hobbing machine |
| EP3574932A1 (en) * | 2018-05-28 | 2019-12-04 | Berlin Heart GmbH | Blood pump |
| CN111922176A (en) * | 2020-08-17 | 2020-11-13 | 华中科技大学 | Magnetic collector, electromagnetic forming impact welding device and application |
-
2021
- 2021-05-21 CN CN202110559237.3A patent/CN113172325B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4456812A (en) * | 1982-07-30 | 1984-06-26 | Armco Inc. | Laser treatment of electrical steel |
| GB201207376D0 (en) * | 2011-04-28 | 2012-06-13 | Kek High Energy Accelerator | Magnetic shielding material for superconducting magnet |
| CN204183122U (en) * | 2014-08-04 | 2015-03-04 | 重庆市光学机械研究所 | Electromagnetic pulse welder collection chinaware |
| CN104625523A (en) * | 2015-02-13 | 2015-05-20 | 杭州焊林科技有限公司 | Double-seam automatic welder |
| CN106964897A (en) * | 2017-05-12 | 2017-07-21 | 东莞市力星激光科技有限公司 | Double annular pipe fitting circumference laser-beam welding machine and method |
Non-Patent Citations (1)
| Title |
|---|
| 基于BGO晶体的反射型法拉第光纤电流传感器;王美蓉等;《光子学报》;20080615;第37卷(第06期);111-115 * |
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