CN108555429B - Large-range continuous ultrasonic welding device for metal foil - Google Patents

Large-range continuous ultrasonic welding device for metal foil Download PDF

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Publication number
CN108555429B
CN108555429B CN201810469088.XA CN201810469088A CN108555429B CN 108555429 B CN108555429 B CN 108555429B CN 201810469088 A CN201810469088 A CN 201810469088A CN 108555429 B CN108555429 B CN 108555429B
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piezoelectric
metal foil
driving wheel
driving
tool head
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CN108555429A (en
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王寅
廖梦娇
张会霞
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Huaqiao University
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Huaqiao University
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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
    • B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
    • 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
    • B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
    • B23K20/106—Features related to sonotrodes
    • 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
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

The invention provides a large-range continuous ultrasonic welding device for metal foil, which comprises the following components: a piezoelectric vibrator system and a pneumatic tool table; the piezoelectric vibrator system comprises two identical multi-drive half-wave transducer structures, two driving wheels and a tool head; the two multi-drive half-wave transducer structures are symmetrically distributed along the horizontal direction relative to the tool head; the driving wheel is arranged between each multi-driving half-wave transducer structure and the tool head and is respectively connected with the multi-driving half-wave transducer structure and the tool head. The invention drives the working head to vibrate up and down through the half-wave transducer, thereby realizing the welding of the metal foil at the bottom of the working head. And the half-wave transducer drives the driving wheel to do elliptical motion, so that the starting workbench is driven to slide along the sliding rail, and then the metal foil moves along with the sliding rail, thereby realizing the purpose of continuous ultrasonic welding.

Description

Large-range continuous ultrasonic welding device for metal foil
Technical Field
The invention relates to the field of ultrasonic motors.
Background
In the ultrasonic metal consolidation technology, an ultrasonic vibration system is one of key factors for determining the performance of the whole ultrasonic system, with the development of the ultrasonic consolidation technology, more and more materials capable of being consolidated are required, and simultaneously, faster consolidation speed and larger processing scale are required, and firstly, an ultrasonic transducer with higher power is required to meet the new processing requirements; meanwhile, in the process of fixedly connecting metal materials, the motor is required to match with the fixedly connecting speed to push the foil, but the matching effect in actual processing is not ideal, and based on the two problems, an ultrasonic piezoelectric vibrator structure integrating functions of a high-output power transducer and an ultrasonic motor is provided. The design of multiple driving and push-pull type not only can greatly improve the power of the transducer, but also can disperse the heat source of the system and improve the energy loss caused by the heating of the system; in addition, the piezoelectric vibrator system has the ultrasonic motor function, so that the synchronous conveying of the metal foil can be realized, and the problem that the motor and the welding speed are difficult to match is solved.
Disclosure of Invention
The invention aims to design a metal foil large-range continuous ultrasonic welding device integrating functions of a high-output power transducer and an ultrasonic motor.
In order to solve the technical problems, the invention provides a large-range continuous ultrasonic welding device for metal foil, comprising: a piezoelectric vibrator system and a pneumatic tool table; the piezoelectric vibrator system comprises two identical multi-drive half-wave transducer structures, two driving wheels and a tool head; the two multi-drive half-wave transducer structures are symmetrically distributed along the horizontal direction relative to the tool head; the driving wheel is arranged between each multi-driving half-wave transducer structure and the tool head and is respectively connected with the tool head;
each multi-drive half-wave transducer structure comprises four piezoelectric transducers and an amplitude transformer; one end of the amplitude transformer is connected with the driving wheel, and the other end of the amplitude transformer is respectively connected with the four piezoelectric transducers; the four piezoelectric transducers have the same structural size, and each piezoelectric transducer is formed by connecting a metal front cover plate and a metal rear cover plate through piezoelectric ceramic plates; the four piezoelectric transducers are divided into two groups, and the excitation modes of piezoelectric ceramics of each group of piezoelectric transducers are different;
the pneumatic tool table comprises a welding working platform and two pneumatic driving platforms, and the pneumatic driving platforms are symmetrically distributed along the horizontal direction relative to the welding working platform; the upper surface of the welding platform is paved with a metal foil, and the bottom end surface of the tool head is provided with a welding device and is positioned above the metal foil; the pneumatic tool table is in sliding connection fit with a sliding rail, and the extending direction of the sliding rail is the same as the extending direction of the metal foil;
the driving wheels are respectively positioned above the pneumatic driving platforms, and the pneumatic driving platforms move up and down along the vertical direction;
the piezoelectric transducer drives the driving wheel to rotate and drives the tool head to vibrate along the axial direction; when the pneumatic driving platform rises along the vertical direction, the pneumatic driving platform is abutted with the driving wheel, and when the driving wheel rotates, the pneumatic driving platform directly generates a friction force along the direction of the sliding rail with the pneumatic driving platform to drive the pneumatic tool table to slide along the sliding rail for a certain distance, so that the metal foil moves along with the pneumatic tool table in the same direction for a certain distance, and the metal foil of the welded part is moved out from the lower part of the welding device.
In a preferred embodiment: the driving wheel is a cylinder with a circular cross section; the tool head is a cylinder with a regular hexagon cross section.
In a preferred embodiment: the piezoelectric transducer drives the driving wheel to do elliptical rotation and drives the tool head to vibrate along the axial direction.
In a preferred embodiment: the piezoelectric ceramic piece is arranged between the metal front cover plate and the metal rear cover plate; each piezoelectric transducer is provided with two groups of piezoelectric ceramic plates;
in a preferred embodiment: in the left half-wave ring energy device structure, four groups of piezoelectric ceramic plates close to the metal rear cover plate are input with a phase of power supply for exciting longitudinal vibration of the tool head;
in the right half-wave transducer structure, four groups of piezoelectric ceramic plates close to a metal rear cover plate are input and excited by an excitation power supply 180 degrees different from a left power supply to excite the tool head to vibrate in the same direction, and two longitudinal vibrations form superposition.
In a preferred embodiment: in the left half-wave energy converter structure, four groups of piezoelectric ceramic plates close to the metal front cover plate are input with a phase of power supply for exciting the driving wheel to generate two mutually perpendicular axial bending movements, and the superposition result is that the driving wheel performs elliptical movements around the axial direction;
in the right half-wave ring energy device structure, four groups of piezoelectric ceramic plates close to the metal front cover plate are input with an excitation power supply 180 degrees different from a left power supply to excite the driving wheel to generate two mutually perpendicular axial bending movements, and the superposition result is that the driving wheel performs elliptical movements around the axial direction.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: the invention drives the working head to vibrate up and down by external force, thereby realizing the welding of the metal foil at the bottom of the working head. And the half-wave transducer drives the driving wheel to do elliptical motion, so that the starting workbench is driven to slide along the sliding rail, and then the metal foil moves along with the sliding rail, thereby realizing the purpose of continuous ultrasonic welding.
Drawings
FIG. 1 is a schematic diagram showing the overall structure of a large-scale continuous ultrasonic welding device for metal foil
Fig. 2 is a schematic diagram of a piezoelectric vibrator system of a large-range continuous ultrasonic welding device for metal foil
FIG. 3 is a left side view of a half wave transducer structure;
FIG. 4 is a diagram of the motion profile of the drive wheel;
fig. 5a and fig. 5b are respectively a piezoelectric ceramic group excitation mode of piezoelectric vibrators of a left side and a right side multi-drive half-wave transducer structure.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Referring to fig. 1-2, a wide range continuous ultrasonic welding apparatus for metal foil, comprising: a piezoelectric vibrator system 1 and a pneumatic tool table 2; the piezoelectric vibrator system 1 comprises two identical multi-drive half-wave transducer structures 11, two driving wheels 12 and a tool head 13; the two multi-drive half-wave transducer structures 11 are symmetrically distributed along the horizontal direction with respect to the tool head 13; the driving wheel 12 is arranged between each multi-drive half-wave transducer structure 11 and the tool head 13 and is respectively connected with the same;
each of the multi-drive half-wave transducer structures 11 includes four piezoelectric transducers 111 and a horn 112, respectively; one end of the amplitude transformer 112 is connected with the driving wheel 12, and the other end is respectively connected with the four piezoelectric transducers 111; the four piezoelectric transducers 111 have the same structural size, and each piezoelectric transducer 111 is formed by connecting a metal front cover plate 1112 and a metal rear cover plate 1113 with a piezoelectric ceramic sheet 1111; the four piezoelectric transducers 111 are divided into two groups, and the excitation modes of piezoelectric ceramics of each group of piezoelectric transducers 111 are different;
the pneumatic tool table 2 comprises a welding working platform 21 and two pneumatic driving platforms 22, wherein the pneumatic driving platforms 22 are symmetrically distributed along the horizontal direction relative to the welding working platform 21; the upper surface of the welding work platform 21 is paved with a metal foil, and the bottom end surface of the tool head 13 is provided with a welding device and is positioned above the metal foil; the pneumatic tool table 2 is in sliding connection fit with a sliding rail, and the extending direction of the sliding rail is the same as the extending direction of the metal foil;
the driving wheels 12 are respectively located above the pneumatic driving platforms 22, and the pneumatic driving platforms 22 move up and down along the vertical direction;
the piezoelectric transducer 111 drives the driving wheel 12 to rotate and drives the tool head 13 to vibrate up and down along the vertical direction; when the pneumatic driving platform 22 rises along the vertical direction, the pneumatic driving platform 22 is abutted with the driving wheel 12, and when the driving wheel 12 rotates, a friction force along the direction of the sliding rail is directly generated with the pneumatic driving platform 22 to drive the pneumatic tool table 2 to slide a certain distance along the sliding rail, so that the metal foil moves along the same direction along the sliding rail for a certain distance, the metal foil of the welded part is moved out from the lower part of the welding device, and then the tool head moves downwards along the vertical direction, thereby realizing ultrasonic welding of new metal foil and realizing the purpose of continuous welding.
In this embodiment, in order to achieve the above technical effect, the piezoelectric transducer 111 drives the driving wheel 12 to make elliptical rotation, and drives the tool head 13 to vibrate up and down along the vertical direction. The long axis or the short axis of the elliptical motion is parallel to the extending direction of the sliding rail. In this embodiment, the long axis is parallel to the sliding rail.
In order to realize that the piezoelectric transducer 111 drives the driving wheel 12 to make elliptical rotation, the piezoelectric ceramic sheet 1111 is arranged between the metal front cover plate 1112 and the metal rear cover plate 1113; each piezoelectric transducer 111 has two sets of piezoelectric ceramic sheets 1111 therein; the two groups of piezoelectric ceramic sheets 1111 are stacked between a metal front cover plate 1112 and a metal rear cover plate 1113.
In the left half-wave ring energy device structure 11, four groups of piezoelectric ceramic plates 1111 close to the metal rear cover plate 1113 are input with a phase of power supply for exciting longitudinal vibration of the driving wheel 12;
in the right half-wave transducer structure 11, four groups of piezoelectric ceramic plates 1111 close to the metal back cover plate 1113 are input with an excitation power source 180 degrees out of phase with the left power source to excite the driving wheel 12 to do the same-direction vibration, and the two longitudinal vibrations form superposition. This achieves the purpose of driving the driving wheel 12 to vibrate up and down.
In the left half-wave transducer structure 11, four groups of piezoelectric ceramic plates 1111 close to the metal front cover plate 1112 are input with a phase of power supply for exciting the driving wheel 12 to generate two mutually perpendicular axial bending movements, and the superposition result is that the driving wheel 12 performs elliptical movements around the axial direction;
in the right half-wave ring structure 11, four groups of piezoelectric ceramic plates 1111 close to the metal front cover plate 1112 are input with excitation power sources 180 degrees out of phase with the left power source for exciting the driving wheel 12 to generate two mutually perpendicular axial bending movements.
Therefore, when welding is needed, only four groups of piezoelectric ceramic sheets 1111 of the left half-wave ring energy device 11, which are close to the metal back cover plate 1113, are excited. When the metal foil needs to be moved, only four groups of piezoelectric ceramic sheets 1111 in the left half-wave ring energy device structure 11 and the right half-wave ring energy device structure 11, which are close to the metal front cover plate 1112, are excited by the input power supply.
The specific excitation pattern is shown in fig. 5a and 5 b. In fig. 5a, when the drive signal is provided in the following manner, a clockwise elliptical motion of the left drive wheel is achieved, and the tool head is vibrated longitudinally:
for the left half-wave transducer structure 11, the four groups of piezoelectric ceramic plates 1111 near the metal back cover plate 1113 input a phase of power as follows: e1 =v 3 sin(ωt)；E1′＝-V 3 sin (ωt); four groups of piezoelectric ceramic sheets 1111 close to the metal front cover plate 1112 input a phase power supply as follows: e2 =v 1 sin(ωt)；E2′＝V 2 cos(ωt)；E2″＝V 2 sin(ωt)；E2″′＝V 1 sin(ωt)；
In fig. 5b, when the drive signal is provided in the following manner, a clockwise elliptical movement of the right-hand drive wheel is achieved, the tool head being longitudinally oscillated:
for the right half-wave transducer structure 11, the four groups of piezoelectric ceramic plates 1111 near the metal back cover plate 1113 are input with a phase difference of 180 ° between a one-phase power supply and a left power supply, and the phase difference is as follows: e3 = -V 3 sin(ωt)；E3′＝V 3 sin (ωt); four groups of piezoelectric ceramic sheets 1111 close to the metal front cover plate 1112 input a phase power supply as follows: e4 = -V 1 sin(ωt)；E4′＝-V 2 cos(ωt)；E4″＝-V 2 sin(ωt)；E4″′＝-V 1 sin(ωt)；
The driving wheel 12 is a cylinder with a circular cross section; the tool head 13 is a cylinder with a regular hexagonal cross section.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims (4)

1. A large-scale continuous ultrasonic welding device for metal foil, characterized by comprising: the piezoelectric vibrator system comprises two identical multi-drive half-wave transducer structures, two driving wheels and a tool head; the two multi-drive half-wave transducer structures are symmetrically distributed along the horizontal direction relative to the tool head; the driving wheel is arranged between each multi-driving half-wave transducer structure and the tool head and is respectively connected with the tool head;
each multi-drive half-wave transducer structure comprises four piezoelectric transducers and an amplitude transformer; one end of the amplitude transformer is connected with the driving wheel, and the other end of the amplitude transformer is respectively connected with the four piezoelectric transducers; the four piezoelectric transducers have the same structural size, and each piezoelectric transducer is formed by connecting a metal front cover plate and a metal rear cover plate through piezoelectric ceramic plates; the four piezoelectric transducers are divided into two groups, and the excitation modes of piezoelectric ceramics of each group of piezoelectric transducers are different;
the pneumatic tool table comprises a welding working platform and two pneumatic driving platforms, and the pneumatic driving platforms are symmetrically distributed along the horizontal direction relative to the welding working platform; the upper surface of the welding work platform is paved with a metal foil, and the bottom end surface of the tool head is provided with a welding device and is positioned above the metal foil; the pneumatic tool table is in sliding connection fit with a sliding rail, and the extending direction of the sliding rail is the same as the extending direction of the metal foil;
the driving wheels are respectively positioned above the pneumatic driving platforms, and the pneumatic driving platforms move up and down along the vertical direction;
the piezoelectric transducer drives the driving wheel to rotate and drives the tool head to vibrate along the axial direction; when the pneumatic driving platform rises along the vertical direction, the pneumatic driving platform is abutted with the driving wheel, and when the driving wheel rotates, the friction force along the direction of the sliding rail is directly generated with the pneumatic driving platform to drive the pneumatic tool table to slide along the sliding rail for a certain distance, so that the metal foil moves along with the pneumatic tool table for a certain distance in the same direction, and the metal foil of the welded part is moved out from the lower part of the welding device;
the driving wheel is a cylinder with a circular cross section; the tool head is a cylinder with a regular hexagon cross section; the piezoelectric transducer drives the driving wheel to do elliptical rotation and drives the tool head to vibrate along the axial direction.
2. The apparatus for continuous ultrasonic welding of metal foil in large scale according to claim 1, wherein: the piezoelectric ceramic piece is arranged between the metal front cover plate and the metal rear cover plate; each piezoelectric transducer has two groups of piezoelectric ceramic plates therein.
3. The apparatus for continuous ultrasonic welding of metal foil in large scale according to claim 2, wherein: in the left half-wave ring energy device structure, four groups of piezoelectric ceramic plates close to the metal rear cover plate are input with a phase of power supply for exciting longitudinal vibration of the tool head;
in the right half-wave transducer structure, four groups of piezoelectric ceramic plates close to the metal rear cover plate are input and an excitation power supply with a phase difference of 180 ︒ with a left power supply is used for exciting the tool head to vibrate in the same direction, and two longitudinal vibrations form superposition.
4. The apparatus for continuous ultrasonic welding of metal foil in large scale according to claim 2, wherein: in the left half-wave energy converter structure, four groups of piezoelectric ceramic plates close to the metal front cover plate are input with a phase of power supply for exciting the driving wheel to generate two mutually perpendicular axial bending movements, and the superposition result is that the driving wheel performs elliptical movements around the axial direction;
in the right half-wave ring energy device structure, four groups of piezoelectric ceramic plates close to the metal front cover plate are input with an excitation power supply 180 degrees different from a left power supply to excite the driving wheel to generate two mutually perpendicular axial bending movements, and the superposition result is that the driving wheel performs elliptical movements around the axial direction.
CN201810469088.XA 2018-05-16 2018-05-16 Large-range continuous ultrasonic welding device for metal foil Active CN108555429B (en)

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CN109127342B (en) * 2018-10-09 2024-04-05 华侨大学 Piezoelectric vibrator structure
CN111822840A (en) * 2019-04-19 2020-10-27 东莞市东和超音波机械有限公司 Torsional welding device
CN112570878A (en) * 2019-09-27 2021-03-30 东莞市东和超音波机械有限公司 Swing type welding device
US11691214B2 (en) * 2021-10-17 2023-07-04 Shinkawa Ltd. Ultrasound horn

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