CN103722291A - Laser shock welding device with shock angle continuously adjustable under vacuum environment - Google Patents
Laser shock welding device with shock angle continuously adjustable under vacuum environment Download PDFInfo
- Publication number
- CN103722291A CN103722291A CN201410001861.1A CN201410001861A CN103722291A CN 103722291 A CN103722291 A CN 103722291A CN 201410001861 A CN201410001861 A CN 201410001861A CN 103722291 A CN103722291 A CN 103722291A
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- laser
- vacuum
- vacuum chamber
- support
- sliding sleeve
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/1224—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in vacuum
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/22—Spot welding
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
Abstract
The invention provides a laser shock welding device with the shock angle continuously adjustable under a vacuum environment. The device comprises a computer control system, a laser generating system, a vacuum system and a clamp, wherein the clamp is located in a vacuum chamber and fixed on the bottom surface of the vacuum chamber, the clamp comprises a horizontal working platform with the vertical position adjustable and an inclined working platform with the inclining angle adjustable, the laser generating system is connected with the vacuum chamber through a light path, and the laser generating system and the vacuum system are both connected with the computer control system. According to the device, continuous adjustment of the shock angle is achieved during laser shock welding, resistance of the atmosphere to an ultra-thin composite plate material under the high-speed shock condition is eliminated, and welding performance is effectively improved.
Description
Technical field
The invention belongs to welding field, the continuously adjustable laser-impact welder of angle of attack under especially a kind of vacuum environment.
Background technology
Laser-impact welding machine is the material solder technology under a kind of emerging high speed impact condition, can realize the spot welding between of the same race and foreign material, its advantage is not have heat affected area after welding, therefore, soldered material can keep the even performance higher than mother metal, it can be as melting at the remitted its fury at solder bond place or welding region because the residual stress existing causes the problems such as crackle, corrosion.This emerging notification number has been proposed high speed impact welding method in the patent Low-temperature laser spot impact welding without contact of US8084710 (B2) first, its principle is Ear Mucosa Treated by He Ne Laser Irradiation becomes HTHP plasma to opaque coating, produces shock wave and drives compound plate material high-speed impact substrate to realize spot welding.In this welding method, angle of attack and impact velocity play important influence to the quality of welding, therefore, normally selected specific angle of attack, for example in " Application of high velocity impact welding at varied different length scales ", selected angle of attack is 15 °.At present, the device of the different angle of attack welding quality impacts of unprecedented research.
Impact velocity is conventionally driven and is controlled by laser energy, is in the patent Low-temperature laser spot impact welding without contact of US8084710 (B2), to propose the spot welding that impact velocity must be greater than 100m/s and can realize compound plate material and substrate according to publication number.For 100 microns of even thinner materials of thickness, under high speed impact, atmospheric pressure can produce very large resistance to compound plate, affects welding quality.And existing laser-impact welding method is not considered this factor, therefore there is defect.
The Fundamentals of Welding of the same explosive welding of laser-impact solder technology, electromagnetic pulse welding are identical, all to utilize two metallic plates with a suitable angle high velocity impact, in shock point position, the stress that impacts generation substantially exceeds the yield stress of metal, and the metal faying face of distortion can produce jet.Injection is propagated gradually along mating surface, has cleared up surperficial oxide layer, leaves two faying faces after clean, and the atom of faying face, under the effect of contact greatly, the combination of chemical bond and metallic bond has occurred, thereby reaches very high bonding strength.Laser-impact welding is generally used for size in 200 microns or thinner material, and welding region diameter is generally several millimeters.The patent that publication number is CN1792545A provides a kind of method and apparatus of preparing gradient material by laser impacting welding, for the welding of the large thickness material of large area.Publication number be CN1757480A patent Introduction a kind of method and apparatus of laser blasting explosion type welding, utilize induced with laser shock wave and blast wave to drive compound plate to clash into substrate and realize welding, for macro-energy with compared with the welding of slab part, in this application, do not relate to the change of angle of attack and impact velocity yet.
Summary of the invention
For Shortcomings in prior art, in order to realize the accurately adjustable continuously of angle of attack in the process of laser-impact welding, be convenient to check easily the impact of different angle of attack welding qualities, and eliminated the resistance of atmospheric pressure to ultra-thin compound plate material under high speed impact condition, effectively improved welding performance; The invention provides the continuously adjustable laser-impact welder of angle of attack under a kind of vacuum environment.
The present invention realizes above-mentioned technical purpose by following technological means.
The continuously adjustable laser-impact welder of angle of attack under a kind of vacuum environment, comprise computer control system, laser generating system, focusing drawtube, vacuum system and fixture, described vacuum system comprises controller for vacuum pump, vavuum pump, vacuum chamber, described controller for vacuum pump and vavuum pump electrically connect, described vavuum pump is connected with the bleeding point of vacuum chamber, on the upper wall of vacuum chamber, is provided with light hole, described fixture is arranged in vacuum chamber, be fixed on the bottom surface of vacuum chamber, described fixture comprises the column of vertical setting, horizontally disposed base, to mating plate, horizontal table, tilting table, sliding sleeve, moving up and down being assemblied on column in one end of described horizontal table, the other end is connected by hinge arrangement with one end of described tilting table, the other end of described tilting table is connected with sliding sleeve by hinge arrangement, describedly slide over being assemblied on base that horizontal direction can move, on described tilting table, be provided with clamping piece, described horizontal table top is provided with compact heap, to mating plate is moving up and down, be contained on column, and be positioned at above horizontal table, described laser generating system comprises laser controller, generating laser, described generating laser is connected with focusing drawtube by optical fiber, described focusing drawtube is arranged on the top of vacuum chamber light hole and is connected with the end face of vacuum chamber, and described laser controller, controller for vacuum pump all electrically connect with computer control system.
Preferably, between described horizontal table and column, by adapter sleeve, be connected, described horizontal table is fixedly connected on adapter sleeve, and described adapter sleeve is enclosed within on column, and described adapter sleeve is realized with the locking of column with separation by holding screw.
Preferably, described sliding sleeve is enclosed within on base.
Preferably, described sliding sleeve is connected by slide rail with base.
Preferably, also comprise the positioning screw being assemblied on sliding sleeve, one end of described positioning screw is connected with column, and the other end is provided with the second locking nut.
Preferably, described tilting table side is provided with angle indicating piece, and the extended line on the base of described angle indicating piece, through the center of the hinge of connection sliding sleeve and tilting table, arranges angle dial on the hinge that connects sliding sleeve and tilting table.
Preferably, described vacuum chamber is surrounded by vacuum cavity, the sealed base of the tubular structure of seal cover, both ends open, vacuum cavity is tightly connected by screw, sealing ring and sealed base, between described seal cover and vacuum cavity, by screw, sealing ring, is tightly connected; Described fixture is fixed on sealed base, and light hole is arranged on seal cover.
Preferably, described laser-impact welder also comprises securing bracket, three-dimensional mobile platform, three-dimensional mobile platform controller, described sealed base is fixed on three-dimensional mobile platform, three-dimensional mobile platform is by the control of three-dimensional mobile platform controller, and described three-dimensional mobile platform controller and computer control system electrically connect; Described securing bracket comprises support, supports swivel nut, circular cover, circular holddown plate, described support is fixed on workbench, supporting swivel nut is fixed on support, cover is contained on support, by supporting swivel nut, supports, described vacuum cavity top is outwards placed in cover at outstanding edge, described holddown plate is placed on seal cover and is assemblied on support, and the first locking nut is housed on the support on holddown plate top.
Preferably, between described support swivel nut and support, be threaded connection.
Beneficial effect of the present invention is:
The first, fixture can be realized the continuous accurate adjustment of angle of attack easily, is convenient to verify the impact of different angle of attack on laser-impact welding quality, effectively reduces the manufacture of different angle of attack fixtures, saves production cost and the clamping time.
The second, eliminate the resistance of atmospheric pressure to ultra-thin compound plate material under high speed impact condition, greatly improved welding performance, also can be used in and study the impact of atmospheric pressure on compound plate material welding performance under the high speed impact that is greater than 100m/s.
Three, by impact angle and atmospheric pressure to the simple and effective check of welding performance impact, the preparation that is applied to the processing of MEMS (MEMS) part and fine-scale composite for laser-impact solder technology provides the guidance of effective technological parameter.
Accompanying drawing explanation
Fig. 1 is the structure chart of continuously adjustable laser-impact welder one embodiment of angle of attack under vacuum environment of the present invention.
Fig. 2 is the front view of described fixture.
Fig. 3 is the left-hand axis mapping of described fixture.
Fig. 4 is the right-hand axis mapping of described fixture.
Fig. 5 is the side view of described compound plate.
Fig. 6 is the front view of described compound plate.
Fig. 7 is the partial enlarged drawing of described fixture.
Fig. 8 is the explosive view of described securing bracket.
Description of reference numerals is as follows:
1-computer control system, 2-laser controller, 3-generating laser, 4-optical fiber, 5-end cap, 6-focusing drawtube, 7-seal cover, 8-securing bracket, 801-support, 802-screw, 803-supports swivel nut, 804-cover, 805-holddown plate, 806-the first locking nut, 9-vacuum cavity, 10-fixture, 11-sealed base, 12-three-dimensional mobile platform, 13-workbench, 14-controller for vacuum pump, 15-three-dimensional mobile platform controller, 16-vavuum pump, 17-column, 18-is to mating plate, 19-compact heap, 20-holding screw, 21-adapter sleeve, 22-horizontal table, 23-holddown plate, 24-tilting table, 25-base, 26-sliding sleeve, 27-the second locking nut, 28-positioning screw, 29-compound plate, the pitch-dark layer of 30-, 31-K9 glass, 32-substrate, 33-angle indicating piece.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to this.
Figure 1 shows that an embodiment of the continuously adjustable laser-impact welder of angle of attack under vacuum environment of the present invention.Under described vacuum environment, the continuously adjustable laser-impact welder of angle of attack, comprises computer control system 1, laser generating system, focusing drawtube 6, vacuum system and fixture 10.
Described vacuum system provides vacuum environment for described laser-impact welder, eliminates the resistance of atmospheric pressure to ultra-thin compound plate material under high speed impact condition, improves welding performance.Described vacuum system comprises controller for vacuum pump 14, vavuum pump 16, vacuum chamber, and described controller for vacuum pump 14 electrically connects with vavuum pump 16, and described vavuum pump 16 is connected with the bleeding point of vacuum chamber.Described controller for vacuum pump 14 is bled and is exitted for controlling vavuum pump 16, and the air pressure in vacuum chamber.On the upper wall of vacuum chamber, be provided with light hole, for laser provides light path.Described laser generating system comprises laser controller 2, generating laser 3, and generating laser 3 produce powers are at the laser of 2J-10J, and laser controller 2 is adjusted laser parameter for controlling generating laser 3.Described generating laser 3 is connected with focusing drawtube 6 by optical fiber.Concrete, between described optical fiber 4 and focusing drawtube 6, being provided with end cap 5, described optical fiber 4 is connected with end cap 5, and described end cap 5 is fixed on focusing drawtube 6, and described end cap 5 is located by straight pin with the position of focusing drawtube 6.Described focusing drawtube 6 is arranged on the top of vacuum chamber light hole and is connected with the end face of vacuum chamber, and uses screw lock.Laser controller 2 is controlled generating laser 3 and is sent laser, through optical fiber 4, is coupled and is transmitted in vacuum chamber by focusing drawtube 6, light hole.Computer control system 1 is as human-computer interaction device, and described laser controller 2, controller for vacuum pump 14 all electrically connect with computer control system 1.Computer control system 1 is for controlling laser controller 2, controller for vacuum pump 14, and parameter is preserved.
As shown in Figure 2, Figure 3, Figure 4, described fixture 10 is arranged in vacuum chamber, is fixed on the bottom surface of vacuum chamber, for fixing weldment.Because laser optical path is incorporated in vacuum plant, effectively raise security, photosensitiveness is also depended on to the positional precision of the light hole on vacuum chamber and the accuracy of manufacture of fixture, greatly reduce human factor to the error that light is caused.Described fixture 10 comprises the column 17, horizontally disposed base 25 of vertical setting, to mating plate 18, horizontal table 22, tilting table 24, sliding sleeve 26.Column 17 is screwed between base 25, and base 25 is connected on the bottom surface of vacuum chamber by screw, realizes the accurate location of fixture.Described horizontal table 22 is for compound plate is installed, and described tilting table 24 is for installation base plate.In order to reach the object that makes laser-impact angle adjustable, moving up and down being assemblied on column 17 in one end of described horizontal table 22, the other end is connected by hinge arrangement with one end of described tilting table 24, the other end of described tilting table 24 is connected with sliding sleeve 26 by hinge arrangement, and what sliding sleeve 26 can move in the horizontal direction is assemblied on base 25.Wherein tilting table 24 is connected with hinge arrangement respectively with horizontal table 22, sliding sleeve 26, can guarantee that tilting table 24 realizes 0～90 ° of rotation around hinge arrangement; Horizontal table 22, sliding sleeve 26 respectively with column 17, base 25 is mobile is connected, and can guarantee that the angle of inclination of described tilting table 24 is adjustable.Between described horizontal table 22 and column 17, by adapter sleeve 21, be connected, described horizontal table 22 is fixedly connected on adapter sleeve 21, and described adapter sleeve 21 is enclosed within on column 17, and described adapter sleeve 21 is realized with the locking of column 17 with separation by holding screw 20.Slip by adapter sleeve 21 on column 17 is to drive the movement of horizontal table 22 at vertical direction.Described sliding sleeve 26 is enclosed within on base 25, is equipped with positioning screw 28 on sliding sleeve 26, and one end of described positioning screw 28 is connected with column, and the other end is provided with the second locking nut 27; Sliding sleeve 26 slides and realizes the conversion of tilting table 24 horizontal levels on base 25.When after the location positioning of tilting table 24, lock with the second locking nut 27.As a kind of modification, described sliding sleeve 26 also can be connected by slide rail with base 25.For the convenient angle of inclination of determining tilting table 24, as shown in Figure 7, at the side of tilting table 24 fixed angle indicating piece 33, make the extended line on the base of described angle indicating piece 33 pass the center of the hinge that connects sliding sleeve 26 and tilting table 24, on this hinge, angle dial is set.On described tilting table 24, be provided with clamping piece 24, described horizontal table 22 tops are provided with compact heap 19, to mating plate 18 is moving up and down, is contained on column 17 and is positioned at horizontal table 22 tops.
As shown in Figure 5, Figure 6, pitch-dark layer 30 is coated in the not polishing region of compound plate 29, and water is cooked adhesive by compound plate 29 and K9 glass 31 close adhesion, and then clamping is on horizontal table 22, and the front end that guarantees compound plate 29 faces the substrate 32 being fixed on tilting table, as shown in Figure 4.
As shown in Figure 1, in the present embodiment, described vacuum chamber is surrounded by vacuum cavity 9, the sealed base 11 of the tubular structure of seal cover 7, both ends open.Vacuum cavity 9 is tightly connected by screw, sealing ring and sealed base 11, between described seal cover 7 and vacuum cavity 9, by screw, sealing ring, is tightly connected; Described fixture 10 is fixed on sealed base 11, and light hole is arranged on seal cover 7.Seal cover 7, vacuum cavity 9 are supported by securing bracket 8, sealed base 11 is fixed on three-dimensional mobile platform 12, three-dimensional mobile platform 12 is controlled by three-dimensional mobile platform controller 15, and described three-dimensional mobile platform controller 15 electrically connects with computer control system 1.As shown in Figure 8, described securing bracket 8 comprises support 801, supports swivel nut 803, circular cover 804, circular holddown plate 805, described support 801 is fixed on workbench, support swivel nut 803 is threaded connection and is assemblied on support 801, cover 804 is contained on support 801, by supporting swivel nut 803, supports, described vacuum cavity 9 tops are outwards placed in cover 804 at outstanding edge, described holddown plate 805 is placed on seal cover 7 and is assemblied on support 801, and the first locking nut 806 is housed on the support 801 on holddown plate 805 tops.By controlling the action of three-dimensional mobile platform 12, realize sealed base 11 with the separation of vacuum cavity 9 and close tight.
Described embodiment is preferred embodiment of the present invention; but invention is not limited to above-mentioned embodiment; in the situation that not deviating from flesh and blood of the present invention, any apparent improvement, replacement or modification that those skilled in the art can make all belong to protection scope of the present invention.
Claims (9)
1. the continuously adjustable laser-impact welder of angle of attack under a vacuum environment, it is characterized in that, comprise computer control system (1), laser generating system, focusing drawtube (6), vacuum system and fixture (10), described vacuum system comprises controller for vacuum pump (14), vavuum pump (16), vacuum chamber, described controller for vacuum pump (14) electrically connects with vavuum pump (16), described vavuum pump (16) is connected with the bleeding point of vacuum chamber, on the upper wall of vacuum chamber, is provided with light hole, described fixture (10) is arranged in vacuum chamber, be fixed on the bottom surface of vacuum chamber, described fixture (10) comprises the column (17) of vertical setting, horizontally disposed base (25), to mating plate (18), horizontal table (22), tilting table (24), sliding sleeve (26), moving up and down being assemblied on column (17) in one end of described horizontal table (22), the other end is connected by hinge arrangement with the one end of described tilting table (24), the other end of described tilting table (24) is connected with sliding sleeve (26) by hinge arrangement, what described sliding sleeve (26) can move in the horizontal direction is assemblied on base (25), on described tilting table (24), be provided with clamping piece (24), described horizontal table (22) top is provided with compact heap (19), to mating plate (18) is moving up and down, be contained on column (17), and be positioned at above horizontal table (22), described laser generating system comprises laser controller (2), generating laser (3), described generating laser (3) is connected with focusing drawtube (6) by optical fiber, described focusing drawtube (6) is arranged on the top of vacuum chamber light hole and is connected with the end face of vacuum chamber, and described laser controller (2), controller for vacuum pump (14) all electrically connect with computer control system (1).
2. laser-impact welder according to claim 1, it is characterized in that, between described horizontal table (22) and column (17), by adapter sleeve (21), be connected, described horizontal table (22) is fixedly connected on adapter sleeve (21), it is upper that described adapter sleeve (21) is enclosed within column (17), and described adapter sleeve (21) is realized with the locking of column (17) with separation by holding screw (20).
3. laser-impact welder according to claim 1, is characterized in that, described sliding sleeve (26) is enclosed within on base (25).
4. laser-impact welder according to claim 1, is characterized in that, described sliding sleeve (26) is connected by slide rail with base (25).
5. laser-impact welder according to claim 1, is characterized in that, also comprises the positioning screw (28) being assemblied on sliding sleeve (26), and one end of described positioning screw (28) is connected with column, and the other end is provided with the second locking nut (27).
6. laser-impact welder according to claim 1, it is characterized in that, described tilting table (24) side is provided with angle indicating piece (33), the extended line on the base of described angle indicating piece (33), through connecting the center of sliding sleeve (26) with the hinge of tilting table (24), arranges angle dial on the hinge that connects sliding sleeve (26) and tilting table (24).
7. laser-impact welder according to claim 1, it is characterized in that, described vacuum chamber is surrounded by vacuum cavity (9), the sealed base (11) of the tubular structure of seal cover (7), both ends open, vacuum cavity (9) is tightly connected by screw, sealing ring and sealed base (11), between described seal cover (7) and vacuum cavity (9), by screw, sealing ring, is tightly connected; It is upper that described fixture (10) is fixed on sealed base (11), and light hole is arranged on seal cover (7).
8. laser-impact welder according to claim 1, it is characterized in that, also comprise securing bracket (8), three-dimensional mobile platform (12), three-dimensional mobile platform controller (15), described sealed base (11) is fixed on three-dimensional mobile platform (12), three-dimensional mobile platform (12) is controlled by three-dimensional mobile platform controller (15), and described three-dimensional mobile platform controller (15) electrically connects with computer control system (1), described securing bracket (8) comprises support (801), support swivel nut (803), circular cover (804), circular holddown plate (805), described support (801) is fixed on workbench, supporting swivel nut (803) is fixed on support (801), cover (804) is contained on support (801), by supporting swivel nut (803), support, described vacuum cavity (9) top is outwards placed in cover (804) at outstanding edge, described holddown plate (805) is placed on seal cover (7), and be assemblied on support (801), on the support (801) on holddown plate (805) top, the first locking nut (806) is housed.
9. laser-impact welder according to claim 8, is characterized in that, between described support swivel nut (803) and support (801), is threaded connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410001861.1A CN103722291B (en) | 2014-01-02 | 2014-01-02 | The continuously adjustable laser-impact welder of angle of attack under a kind of vacuum environment |
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| CN201410001861.1A CN103722291B (en) | 2014-01-02 | 2014-01-02 | The continuously adjustable laser-impact welder of angle of attack under a kind of vacuum environment |
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| CN103722291B CN103722291B (en) | 2015-09-02 |
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| CN104227220A (en) * | 2014-09-12 | 2014-12-24 | 江苏大学 | Large-area laser impact spot welding method and device based on nano-particle reinforcement |
| CN106238913A (en) * | 2016-08-18 | 2016-12-21 | 江苏大学 | The percussion welding connection device of silk and paper tinsel and method under a kind of Laser shock loading |
| CN106238912A (en) * | 2016-08-15 | 2016-12-21 | 江苏大学 | A kind of laser-impact welder and method thereof |
| CN107580534A (en) * | 2015-04-08 | 2018-01-12 | 费尔索梅特有限及两合公司 | Method for the vacuum laser welding at least workpiece of two-part |
| CN108637470A (en) * | 2018-04-12 | 2018-10-12 | 江苏大学 | A kind of laser transmission welding system and method |
| CN109048029A (en) * | 2018-08-21 | 2018-12-21 | 江苏大学 | A kind of laser-impact pressure welding Automatic-clamping pick-off unit and its method |
| CN109604415A (en) * | 2018-12-14 | 2019-04-12 | 安徽工业大学 | A kind of Laser Shock Forming method and device |
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| CN109048029B (en) * | 2018-08-21 | 2020-07-31 | 江苏大学 | Automatic clamping and taking device and method for laser impact pressure welding |
| CN109048029A (en) * | 2018-08-21 | 2018-12-21 | 江苏大学 | A kind of laser-impact pressure welding Automatic-clamping pick-off unit and its method |
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| CN113084662A (en) * | 2021-04-19 | 2021-07-09 | 重庆科技学院 | Electromagnetic pulse welding process and equipment for thick plate for aviation |
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