CN109079326A - A kind of device of the rolling-type ultrasonic wave added Laser Welding for magnesium alloy - Google Patents

A kind of device of the rolling-type ultrasonic wave added Laser Welding for magnesium alloy Download PDF

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Publication number
CN109079326A
CN109079326A CN201811029812.3A CN201811029812A CN109079326A CN 109079326 A CN109079326 A CN 109079326A CN 201811029812 A CN201811029812 A CN 201811029812A CN 109079326 A CN109079326 A CN 109079326A
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China
Prior art keywords
laser
laser head
magnesium alloy
rolling
workpiece
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CN201811029812.3A
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Chinese (zh)
Inventor
丁树权
游德勇
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Guangdong University of Technology
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Guangdong University of Technology
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Priority to CN201811029812.3A priority Critical patent/CN109079326A/en
Publication of CN109079326A publication Critical patent/CN109079326A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/346Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03Observing, e.g. monitoring, the workpiece
    • B23K26/032Observing, e.g. monitoring, the workpiece using optical means

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

The invention discloses a kind of devices of rolling-type ultrasonic wave added Laser Welding for magnesium alloy, including laser, laser head, monitor and pulse laser emission device, the laser is connect with laser head by optical fiber, the side on the laser head top is equipped with shooting unit, the shooting unit and monitor are electrically connected, the bottom emission laser beam of the laser head, the side of the laser beam is equipped with gas nozzle, the side of the laser is equipped with air pump, and air pump is connect with gas nozzle by tracheae, workpiece is installed below the laser beam, the bottom end of the laser beam and the upper end face contact of workpiece form molten bath, the upper surface of the workpiece and the lower end surface of workpiece are mounted on transport idler wheel, the side of the transport idler wheel is equipped with transmission shaft, described two transmission shafts are connected by linkage mechanism.Present device is simple, flexible in application, and high production efficiency is at low cost.

Description

A kind of device of the rolling-type ultrasonic wave added Laser Welding for magnesium alloy
Technical field
The present invention relates to magnesium alloy welding technology field, specially a kind of rolling-type ultrasonic wave added for magnesium alloy The device of Laser Welding.
Background technique
Laser welding technology is high with its energy density, heat input is low, weldment deformation is small, weld dimensions are narrow, fusion penetration The features such as big, is widely used in automobile manufacture.With the high speed development of auto industry, automotive light weight technology is to realize environmental protection Necessary ways.Magnesium alloy small, high specific strength and specific stiffness, machining property be good, absorptions to shock and vibration with its density Property high, feature that creep-resistant property is good, the production being widely used in the components such as vehicle frame, engine cylinder block, crankcase In, gradually become the novel metal structural material after steel.Laser welding technology is applied to the manufacture of magnesium alloy parts In the process, heat can be preferably minimized to requirement, heat affected area metallographic variation range is small, and because do not need using electrode and There is no electrode fouling and impaired misgivings.
But existing laser beam energy density is high, unit time unit area heat input is big and magnesium alloy chemical Property is active, fusing point is low, thermally conductive fast feature, is easy to cause welding point coarse grains, and there are stress collection to neutralize residual pressure Stress, while phenomena such as there is also crackles, stomata, the matching with base material is reduced, the mechanics of magnesium alloy welding structural member is influenced Performance;Therefore, it is unsatisfactory for existing demand, we have proposed a kind of rolling-type ultrasonic wave added Laser Weldings for magnesium alloy to this Device.
Summary of the invention
The purpose of the present invention is to provide a kind of devices of rolling-type ultrasonic wave added Laser Welding for magnesium alloy, to solve Existing laser beam energy density mentioned above in the background art is high, unit time unit area heat input is big and magnesium Alloy chemistry is active, fusing point is low, thermally conductive fast feature, is easy to cause welding point coarse grains, and there are the neutralizations of stress collection Residual compressive stress, while phenomena such as there is also crackles, stomata, the matching with base material is reduced, magnesium alloy welding structural member is influenced Mechanical property the problems such as.
To achieve the above object, the invention provides the following technical scheme: a kind of rolling-type ultrasonic wave added for magnesium alloy The device of Laser Welding, including laser, laser head, monitor and pulse laser emission device, the laser pass through with laser head Optical fiber connection, the side on the laser head top are equipped with shooting unit, and the shooting unit and monitor are electrically connected, described The bottom emission laser beam of laser head, the side of the laser beam are equipped with gas nozzle, and the side of the laser is equipped with Air pump, and air pump is connect with gas nozzle by tracheae, and workpiece, the bottom end of the laser beam are equipped with below the laser beam Molten bath is formed with the upper end face contact of workpiece, the upper surface of the workpiece and the lower end surface of workpiece are mounted on transport idler wheel, institute The side for stating transport idler wheel is equipped with transmission shaft, and described two transmission shafts are connected by linkage mechanism, the side of the laser head Pulse laser head is installed, the pulse laser head is connect with pulse laser emission device by optical fiber.
Preferably, the molten bath includes keyhole, solidifies the low-temperature space of weld seam and solidify the high-temperature region of weld seam, the solidification weldering The high-temperature region of seam contacts to form keyhole with laser beam, and the internal high temperature of the high-temperature region of the solidification weld seam forms stomata, described solidifying Gu the side of the high-temperature region of weld seam is provided with the low-temperature space of solidification weld seam.
Preferably, the bottom end integrated installation of the laser head has amplitude transformer, and the side of the laser head is equipped with ultrasonic hair Emitter, the laser head are connect with ultrasonic transmitter by ultrasonic transducer.
Preferably, the transmission shaft extends to the inside of transport idler wheel, and the transmission shaft and transport idler wheel pass through positioning pin Connection.
Preferably, the shooting unit extends to the inside of laser head, the shooting unit and laser head and is connected by screw thread It connects.
Preferably, the extension of optical fiber is to the inside of laser, and the optical fiber is connected through a screw thread with laser, and optical fiber Sealing rubber ring is installed with the junction of laser.
Compared with prior art, the beneficial effects of the present invention are:
1, the present invention is connected with pulse laser emission device, issues super by installing a pulse laser head above workpiece The pulse laser of audio frequency makes molten bath generate ultrasonic frequency vibration, and the stomata inside high-temperature region for solidifying weld seam plays acceleration gas Bubble evolution has better effect;
2, the present invention is mounted on transport idler wheel by the upper surface of workpiece and the lower end surface of workpiece and can carry out to workpiece Molten bath is rolled while transport, flattens work;
3, the present invention is equipped with the case where molten bath can be observed in real time in shooting unit by the side above laser head.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the device of rolling-type ultrasonic wave added Laser Welding for magnesium alloy of the invention;
Fig. 2 is the structural schematic diagram for choosing to install ultrasonic transmitter state of the invention;
Fig. 3 is the structural schematic diagram in molten bath of the invention.
In figure: 1, laser;2, optical fiber;3, laser head;4, pulse laser head;5, workpiece;6, molten bath;7, idler wheel is transported; 8, linkage mechanism;9, monitor;10, pulse laser emission device;11, laser beam;12, shooting unit;13, stomata;14, keyhole; 15, the low-temperature space of weld seam is solidified;16, the high-temperature region of weld seam is solidified;17, ultrasonic transmitter;18, gas nozzle;19, air pump;20, Transmission shaft.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Fig. 1-3 is please referred to, a kind of embodiment provided by the invention: a kind of rolling-type ultrasonic wave added laser for magnesium alloy The device of weldering, including laser 1, laser head 3, monitor 9 and pulse laser emission device 10, laser 1 and laser head 3 pass through light Fibre 2 connects, and the side on 3 top of laser head is equipped with shooting unit 12, and shooting unit 12 and monitor 9 are electrically connected, laser head 3 Bottom emission laser beam 11, the side of laser beam 11 is equipped with gas nozzle 18, and the side of laser 1 is equipped with air pump 19, And air pump 19 is connect with gas nozzle 18 by tracheae, the lower section of laser beam 11 is equipped with workpiece 5, the bottom end of laser beam 11 and work The upper end face contact of part 5 forms molten bath 6, and the upper surface of workpiece 5 and the lower end surface of workpiece 5 are mounted on transport idler wheel 7, transport rolling The side of wheel 7 is equipped with transmission shaft 20, and two transmission shafts 20 are connected by linkage mechanism 8, and the side of laser head 3 is equipped with pulse Laser head 4, pulse laser head 4 are connect with pulse laser emission device 10 by optical fiber, and pulse laser head 4 and pulse laser hair are chosen to install Emitter 10 opens pulse laser emission device 10, issues overclocking laser by pulse laser head 4, and molten bath is made to generate ultrasonic frequency vibration, The stomata 13 inside high-temperature region 16 for solidifying weld seam, which plays, accelerates bubble evolution to have better effect.
Further, molten bath 6 includes keyhole 14, solidifies the low-temperature space 15 of weld seam and solidify the high-temperature region 16 of weld seam, solidification weldering The high-temperature region 16 of seam contacts to form keyhole 14 with laser beam 11, and the internal high temperature for solidifying the high-temperature region 16 of weld seam forms stomata 13, The side for solidifying the high-temperature region 16 of weld seam is provided with the low-temperature space 15 of solidification weld seam, solidifies weldering by the high temperature melt of laser beam 11 It is welded the high-temperature region 16 of seam.
Further, the bottom end integrated installation of laser head 3 has amplitude transformer, and the side of laser head 3 is equipped with ultrasonic transmitter 17, Laser head 3 is connect with ultrasonic transmitter 17 by ultrasonic transducer, passes through ultrasonic transduction by ultrasonic transmitter 17 and laser head 3 Device connection, converts electrical energy into ultrasonic vibration.
Further, transmission shaft 20 extends to the inside of transport idler wheel 7, and transmission shaft 20 and transport idler wheel 7 are connected by positioning pin It connects, the rotation of transport idler wheel 7 is driven by the rotation of transmission shaft 20.
Further, shooting unit 12 extends to the inside of laser head 3, and shooting unit 12 is connected through a screw thread with laser head 3, The case where by 12 real-time monitoring molten bath 6 of shooting unit.
Further, optical fiber 2 extends to the inside of laser 1, and optical fiber 2 is connected through a screw thread with laser 1, and optical fiber 2 with The junction of laser 1 is equipped with sealing rubber ring, improves the stability of optical fiber 2 and laser 1 and close by sealing rubber ring Feng Xing.
Working principle: in use, powering on, workpiece 5 being placed between two transport idler wheels 7, opening laser 1, Monitor 9 and air pump 19 drive two transmission shafts 20 and transport idler wheel 7 to rotate, workpiece 5 are transported by linkage mechanism 8, Emit light energy by laser 1 and enter the inside of laser head 3 from the bottom end outgoing laser beam 11 of laser head 3 along optical fiber 2, The upper end face contact of laser beam 11 and workpiece 5 forms the high-temperature region 16 of solidification weld seam, the high-temperature region of laser beam 11 and solidification weld seam 16 direct contact point forms keyhole 14, is equipped with gas nozzle 18 by the side of laser beam 11, dries, passes through to keyhole 14 Windchill can choose to install pulse laser head 4 and pulse laser emission device 10, open pulse laser emission device 10, pass through pulse Laser head 4 issues overclocking laser, and molten bath is made to generate ultrasonic frequency vibration, and the stomata 13 inside high-temperature region 16 for solidifying weld seam rises There is better effect to accelerating bubble to escape, or choose to install ultrasonic transmitter 17, ultrasonic transmitter 17 and laser head 3 is passed through super Sonic transducer connection, converts electrical energy into ultrasonic vibration, and be transmitted to end by the amplitude transformer of integrated installation on laser head, right The stomata 13 that molten bath 6 carries out inside high-temperature region 16 of the ultrasonic radiation for solidifying weld seam, which plays, accelerates bubble evolution to have better effect Fruit, transport idler wheel 7 roll molten bath 6 while rotating transmitting workpiece 5, and the high-temperature region 16 of the solidification weld seam rolled is additional air-cooled Effect forms the low-temperature space 15 of solidification weld seam.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.

Claims (6)

1. a kind of device of the rolling-type ultrasonic wave added Laser Welding for magnesium alloy, including laser (1), laser head (3), monitoring Device (9) and pulse laser emission device (10), it is characterised in that: the laser (1) is connect with laser head (3) by optical fiber (2), The side on laser head (3) top is equipped with shooting unit (12), and the shooting unit (12) electrically connects with monitor (9) It connecing, the side of the bottom emission laser beam (11) of the laser head (3), the laser beam (11) is equipped with gas nozzle (18), The side of the laser (1) is equipped with air pump (19), and air pump (19) is connect with gas nozzle (18) by tracheae, described to swash It is equipped with below light beam (11) workpiece (5), the bottom end of the laser beam (11) and the upper end face contact of workpiece (5) form molten bath (6), the upper surface of the workpiece (5) and the lower end surface of workpiece (5) are mounted on transport idler wheel (7), transport idler wheel (7) Side is equipped with transmission shaft (20), and described two transmission shafts (20) are connected by linkage mechanism (8), and the one of the laser head (3) Side is equipped with pulse laser head (4), and the pulse laser head (4) is connect with pulse laser emission device (10) by optical fiber.
2. a kind of device of rolling-type ultrasonic wave added Laser Welding for magnesium alloy according to claim 1, feature exist In: the molten bath (6) includes the high-temperature region (16) of keyhole (14), the low-temperature space (15) for solidifying weld seam and solidification weld seam, described solidifying Gu the high-temperature region (16) of weld seam contacts to be formed keyhole (14) with laser beam (11), the inside of the high-temperature region (16) of the solidification weld seam High temperature forms stomata (13), and the side of the high-temperature region (16) of the solidification weld seam is provided with the low-temperature space (15) of solidification weld seam.
3. a kind of device of rolling-type ultrasonic wave added Laser Welding for magnesium alloy according to claim 1, feature exist In: the bottom end integrated installation of the laser head (3) has amplitude transformer, and the side of the laser head (3) is equipped with ultrasonic transmitter (17), the laser head (3) is connect with ultrasonic transmitter (17) by ultrasonic transducer.
4. a kind of device of rolling-type ultrasonic wave added Laser Welding for magnesium alloy according to claim 1, feature exist In: the transmission shaft (20) extends to the inside of transport idler wheel (7), and the transmission shaft (20) and transport idler wheel (7) pass through positioning Pin connection.
5. a kind of device of rolling-type ultrasonic wave added Laser Welding for magnesium alloy according to claim 1, feature exist In: the shooting unit (12) extends to the inside of laser head (3), and the shooting unit (12) and laser head (3) pass through screw thread Connection.
6. a kind of device of rolling-type ultrasonic wave added Laser Welding for magnesium alloy according to claim 1, feature exist In: the optical fiber (2) extends to the inside of laser (1), and the optical fiber (2) is connected through a screw thread with laser (1), and optical fiber (2) sealing rubber ring is installed with the junction of laser (1).
CN201811029812.3A 2018-09-05 2018-09-05 A kind of device of the rolling-type ultrasonic wave added Laser Welding for magnesium alloy Pending CN109079326A (en)

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CN201811029812.3A CN109079326A (en) 2018-09-05 2018-09-05 A kind of device of the rolling-type ultrasonic wave added Laser Welding for magnesium alloy

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Publication number Priority date Publication date Assignee Title
CN110977168A (en) * 2019-12-24 2020-04-10 长春理工大学 Connection method of SiCp/Al composite material
CN112756762A (en) * 2021-01-21 2021-05-07 华中科技大学 Method and device for improving performance of aluminum alloy welded joint based on in-situ rolling
CN114769877A (en) * 2022-06-20 2022-07-22 中山大学 Welding-following swinging ultrasonic-assisted laser welding device and method

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110977168A (en) * 2019-12-24 2020-04-10 长春理工大学 Connection method of SiCp/Al composite material
CN112756762A (en) * 2021-01-21 2021-05-07 华中科技大学 Method and device for improving performance of aluminum alloy welded joint based on in-situ rolling
CN114769877A (en) * 2022-06-20 2022-07-22 中山大学 Welding-following swinging ultrasonic-assisted laser welding device and method

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Application publication date: 20181225