CN109365970B - Ultrasonic seam welding and resistance internal heat combined metal seam welding device - Google Patents
Ultrasonic seam welding and resistance internal heat combined metal seam welding device Download PDFInfo
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- CN109365970B CN109365970B CN201810790059.3A CN201810790059A CN109365970B CN 109365970 B CN109365970 B CN 109365970B CN 201810790059 A CN201810790059 A CN 201810790059A CN 109365970 B CN109365970 B CN 109365970B
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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
- B23K11/00—Resistance welding; Severing by resistance heating
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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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/36—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
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
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Abstract
The invention relates to an ultrasonic seam welding and resistance internal heating composite metal seam welding device which is characterized by being provided with an ultrasonic seam welding mechanism and a resistance internal heating welding mechanism, wherein the ultrasonic seam welding mechanism is provided with an ultrasonic generator and a seam welding pressure head (14), and two sides of the seam welding pressure head (14) are respectively provided with a transducer (1) and a transducer (12); the resistance internal heat welding mechanism is provided with a medium-frequency/high-frequency resistance welding power supply for outputting medium-frequency/high-frequency pulse current, electric pulses output by the medium-frequency/high-frequency resistance welding power supply are sent to a conductive roller wheel through an electrode support, and the conductive roller wheel is contacted with a metal plate to be welded; the medium-frequency/high-frequency resistance welding power supply outputs two paths of same electric pulse signals which are respectively sent to the two electrode supports, the two electrode supports are respectively connected with the two conductive rollers, and the two conductive rollers output electric signals to the contact surface of the metal plate to be welded.
Description
Technical Field
The invention relates to the technical field of welding, in particular to an ultrasonic roll welding and resistance internal heat composite metal seam welding device which can effectively avoid the phenomenon of joint softening caused by fusion welding and eliminate welding defects such as air holes and the like.
Background
The arc welding technology is an effective metal connection method and is widely applied to the fields of rail transit, aerospace and the like. With the continuous development of welding technology, a welding method using high-energy beams such as plasma, laser, electron beam and the like as heat sources is developed, and the quality and efficiency problems of the traditional welding method are further improved. However, for the welding of metal materials, the above melting welding method often brings about the defects of softening of welding joints, air holes and the like, and the application range and the service life of the metal welding component are seriously influenced. This problem is not ameliorated until friction stir welding has occurred, by replacing fusion welding with solid phase bonding. However, friction stir welding has severe requirements for assembly constraints and joint formation of workpieces, and welding equipment is expensive, and thus cannot be widely used.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides the ultrasonic roll welding and resistance internal heat composite metal seam welding device which can effectively avoid the joint softening phenomenon caused by fusion welding and eliminate the welding defects such as air holes and the like.
The invention can be achieved by the following measures:
the device for welding the ultrasonic seam welding and the resistance internal heating composite metal seam is characterized by being provided with an ultrasonic seam welding mechanism and a resistance internal heating welding mechanism, wherein the ultrasonic seam welding mechanism is provided with an ultrasonic generator and a seam welding pressure head (14), and two sides of the seam welding pressure head (14) are respectively provided with a first transducer (1) and a second transducer (12); the resistance internal heat welding mechanism is provided with a medium-frequency/high-frequency resistance welding power supply for outputting medium-frequency/high-frequency pulse current, electric pulses output by the medium-frequency/high-frequency resistance welding power supply are sent to a conductive roller wheel through an electrode support, and the conductive roller wheel is contacted with a metal plate to be welded; the medium-frequency/high-frequency resistance welding power supply outputs two paths of same electric pulse signals which are respectively sent to the two electrode supports, the two electrode supports are respectively connected with the two conductive rollers, and the two conductive rollers output electric signals to the contact surface of the metal plate to be welded.
The metal plates to be welded are fixed on a workbench (6), wherein a first pressing plate (2), a backing strip (8), an insulating backing plate and a second pressing plate (11) are arranged on the workbench (6) and used for fixing the two metal plates to be welded on the workbench (6), and the two metal plates to be welded are electrically insulated through the insulating backing plate in the welding process.
The contact surfaces of the two metal plates to be welded can be designed into a slope shape which is embedded with each other, or can be designed into an L-shaped groove which can be buckled with each other, or can be designed into a step shape which can be buckled with each other, wherein the included angle between the horizontal plane of the step and the side surface is an obtuse angle, so that the butt joint of the metal plate flat plates is ensured.
The low-melting-point foil can be arranged between the contact surfaces of the two metal plates to be welded, and the connection is realized through the melting of the foil by heating.
The conductive roller consists of chromium, zirconium and copper, the conductive handle is made of brass material, and current can be applied by adopting a single-side multi-pressure head.
When the welding device works, firstly, a plate to be welded is arranged on a workbench (6) and is fixed through a flexible tool, the flexible tool consists of a first pressing plate (2), a filler strip (8), an insulating base plate and a second pressing plate (11), and two metal plates to be welded are electrically insulated through the insulating base plate in the welding process; then setting working parameters, starting an ultrasonic generator, setting ultrasonic welding parameters including power, amplitude and speed, and simultaneously starting a medium-frequency/high-frequency resistance welding power supply, wherein the current parameters are set to be 4KA-8 KA; preheating and softening the contact surface of a plate to be welded by a resistance internal heat welding mechanism, wherein the highest preheating temperature is 400 ℃, and welding the welding line of the metal plate to be welded by an ultrasonic roll welding mechanism; the preset foils in the contact surface of the plate to be welded can be heated by a resistance internal heat welding mechanism, so that the metal foils are melted to realize connection; the maximum welding power of the ultrasonic generator was 4 KW.
Compared with the prior art, the invention can effectively avoid the joint softening phenomenon caused by fusion welding, eliminate the welding defects of air holes and the like, has wide application prospect, and also falls into the protection range of the device by referring to the composition of the follow-up resistance heating structure and other forms of heat sources (friction stir welding, consumable electrode or non-molten gas shielded welding).
Description of the drawings:
fig. 1 is a front view of the present invention.
Figure 2 is a top view of the present invention.
FIG. 3 is a schematic diagram of three groove structures of materials to be welded in the present invention.
Reference numerals: the welding device comprises a first energy converter (1), a first pressing plate (2), a resistance welding roller (3), a metal (4) to be welded, an insulating base plate (5), a workbench (6), an insulating base plate (7), an adjusting backing strip (8), a metal (9) to be welded, a resistance welding roller (10), a second pressing plate (11), a second energy converter (12), an electrode support (13), a roll welding pressure head (14), an electrode support (15), a medium-frequency/high-frequency resistance welding power supply (16) and a steel base plate (17).
The specific implementation mode is as follows:
the invention will be further described with reference to the accompanying drawings.
As shown in the attached drawing, the invention provides an ultrasonic seam welding and resistance internal heating composite metal seam welding device which is characterized by being provided with an ultrasonic seam welding mechanism and a resistance internal heating welding mechanism, wherein the ultrasonic seam welding mechanism is provided with an ultrasonic generator and a seam welding pressure head (14), and two sides of the seam welding pressure head (14) are respectively provided with a first transducer (1) and a second transducer (12); the resistance internal heat welding mechanism is provided with a medium-frequency/high-frequency resistance welding power supply (16) for outputting medium-frequency/high-frequency pulse current, electric pulses output by the medium-frequency/high-frequency resistance welding power supply are sent to the conductive roller wheel through the electrode support, and the conductive roller wheel is contacted with a metal plate to be welded; the medium-frequency/high-frequency resistance welding power supply outputs two paths of same electric pulse signals which are respectively sent to the two electrode supports, the two electrode supports are respectively connected with the two conductive rollers, and the two conductive rollers output electric signals to the contact surface of the metal plate to be welded.
The metal plates to be welded are fixed on a workbench (6), wherein a first pressing plate (2), a backing strip (8), an insulating backing plate and a second pressing plate (11) are arranged on the workbench (6) and used for fixing the two metal plates to be welded on the workbench (6), and the two metal plates to be welded are electrically insulated through the insulating backing plate in the welding process.
The contact surfaces of the two metal plates to be welded can be designed into a slope shape which is embedded with each other, or can be designed into an L-shaped groove which can be buckled with each other, or can be designed into a step shape which can be buckled with each other, wherein the included angle between the horizontal plane of the step and the side surface is an obtuse angle, so that the butt joint of the metal plate flat plates is ensured.
The low-melting-point foil can be arranged between the contact surfaces of the two metal plates to be welded, and the connection is realized through the melting of the foil by heating.
The conductive roller consists of chromium, zirconium and copper, the conductive handle is made of brass material, and current can be applied by adopting a single-side multi-pressure head.
In the ultrasonic roll welding process of the metal plate, the heat resistance is generated at the contact surface of the alloy plate through the pulse current so as to achieve the purposes of preheating and softening the plate, and the preheating temperature can be accurately adjusted according to different plate thicknesses and joint forms within a set range. The adoption of the proper preheating temperature can realize the softening of the plates, is beneficial to the energy conduction of the ultrasonic pressure head, further improves the solid-phase connection strength of the welding line, and can also place a low-melting-point foil between the plates to realize the melting of the foil and realize the connection. The flat plate butt joint of the metal plates can be realized by means of a special groove form. The butt welding seam of the metal plates obtained by the method can effectively avoid the joint softening phenomenon caused by fusion welding and eliminate welding defects such as air holes and the like.
Example 1:
taking aluminum alloy as an example, the welding principle is shown in figure 1, the actual welding mode is shown in figure 3, the groove form is shown in figure 3, and the thickness of the aluminum alloy plate to be welded is 2 mm. In the welding process, firstly, the aluminum alloy plate is installed on the workbench and fixed by using a flexible tool. The power supply of an ultrasonic generator and a pulse heat-resistant device is started, ultrasonic welding parameters (power is 3KW, amplitude is 25 mu m, speed is 8 mm/s) and pulse heat-resistant device parameters (current is 4 KA) are set, high-frequency current acts on the contact interface of two metal plates to realize heating and softening of interface metal, after all the metal plates are ready, welding is carried out along the direction shown in the figure, and then a high-quality solid-phase cold-welding seam can be obtained.
Compared with the prior art, the invention can effectively avoid the joint softening phenomenon caused by fusion welding, eliminate the welding defects such as air holes and the like, has wide application prospect, and also falls into the protection of the invention when the structure or the welding technology of the friction stir welding, the consumable electrode and the non-consumable electrode realized by referring to the structure replaces the ultrasonic rolling welding head for composite welding design and device.
Claims (1)
1. A method for welding an ultrasonic seam and a resistance internal heating composite metal seam is provided with an ultrasonic seam welding mechanism and a resistance internal heating welding mechanism, wherein the ultrasonic seam welding mechanism is provided with an ultrasonic generator and a seam welding pressure head (14), and two sides of the seam welding pressure head (14) are respectively provided with a first transducer (1) and a second transducer (12); the resistance internal heat welding mechanism is provided with a medium-frequency/high-frequency resistance welding power supply for outputting medium-frequency/high-frequency pulse current, electric pulses output by the medium-frequency/high-frequency resistance welding power supply are sent to a conductive roller wheel through an electrode support, and the conductive roller wheel is contacted with a metal plate to be welded; the medium-frequency/high-frequency resistance welding power supply outputs two paths of same electric pulse signals which are respectively sent to the two electrode supports, the two electrode supports are respectively connected with the two conductive rollers, and the two conductive rollers output electric signals to the contact surface of the metal plate to be welded; the current parameter of a medium-frequency/high-frequency resistance welding power supply in the resistance internal thermal welding mechanism is 4KA, the contact surface of a plate to be welded is preheated and softened by the resistance internal thermal welding mechanism, and the highest preheating temperature is 400 ℃;
the welding power of the ultrasonic generator is 3 KW;
the metal plates to be welded are fixed on the workbench (6), wherein the workbench (6) is provided with a first pressing plate (2), a filler strip (8), an insulating base plate and a second pressing plate (11) for fixing the two metal plates to be welded on the workbench (6), and the two metal plates to be welded are electrically insulated through the insulating base plate in the welding process;
the contact surfaces of the two metal plates to be welded are designed into a slope shape which is embedded with each other, or are designed into an L-shaped groove which can be buckled with each other, or are designed into a step shape which can be buckled with each other, wherein the horizontal plane of the step and the side surface form an obtuse angle, so that the butt joint of the metal plate flat plates is ensured;
a low-melting-point foil can be arranged between the contact surfaces of the two metal plates to be welded, and the connection is realized by melting the foil by heating;
the conductive roller is made of chromium, zirconium and copper, the conductive handle is made of brass material, and a single-side multi-pressure head is adopted to apply current;
the working parameters of the ultrasonic roll welding mechanism are 3KW in power, 25 mu m in amplitude and 8mm/s in speed, and the parameters in the resistance internal heat welding mechanism are 4KA in current;
the ultrasonic seam welding and resistance internal heating composite metal seam welding method is characterized by comprising the following steps:
firstly, a plate to be welded is arranged on a workbench and is fixed through a flexible tool, the flexible tool is composed of a first pressing plate (2), a filler strip (8), an insulating base plate and a second pressing plate (11), and the two metal plates to be welded are electrically insulated through the insulating base plate in the welding process; then setting working parameters, starting an ultrasonic generator, setting ultrasonic welding parameters including power, amplitude and speed, and simultaneously starting a medium-frequency/high-frequency resistance welding power supply, wherein the current parameter is set to be 4 KA; preheating and softening the contact surface of the metal plate to be welded by a resistance internal heat welding mechanism, wherein the highest preheating temperature is 400 ℃, and welding the welding line of the metal plate to be welded by an ultrasonic roll welding mechanism.
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| CN201810790059.3A CN109365970B (en) | 2018-07-18 | 2018-07-18 | Ultrasonic seam welding and resistance internal heat combined metal seam welding device |
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| CN201810790059.3A CN109365970B (en) | 2018-07-18 | 2018-07-18 | Ultrasonic seam welding and resistance internal heat combined metal seam welding device |
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| CN109365970B true CN109365970B (en) | 2021-12-31 |
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| CN111014934A (en) * | 2019-12-31 | 2020-04-17 | 哈尔滨工程大学 | Method for preparing metal laminar composite material by high-energy pulse current-assisted ultrasonic consolidation |
| CN112692422B (en) * | 2020-12-15 | 2022-01-21 | 中山大学 | Plasma arc enhanced ultrasonic metal composite plate preparation device and method |
| CN114871607B (en) * | 2022-05-26 | 2024-03-15 | 深圳市深发源精密科技有限公司 | Ultrasonic welding device for auxiliary preheating workpiece by resistor |
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| CN103600166A (en) * | 2013-12-02 | 2014-02-26 | 哈尔滨工业大学（威海） | Method and device for auxiliary heating type ultrasound rapid forming |
| DE102012215210A1 (en) * | 2012-08-28 | 2014-03-06 | Voith Patent Gmbh | Connecting device for connecting terminal web section of e.g. paper web, of screw nut roller for paper machine, has sonotrodes connecting terminal web section to material web with roller portion by ultrasonic welding by seam |
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Patent Citations (5)
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| US6920791B2 (en) * | 2000-12-15 | 2005-07-26 | Ge Inspection Technologies Systems | Ultrasound monitoring of overlapping welded joints between sheets |
| CN101829824A (en) * | 2010-04-12 | 2010-09-15 | 广州电器科学研究院 | Compound heating soldering method of precise part resistance heat and supersonic vibration |
| CN201693266U (en) * | 2010-06-23 | 2011-01-05 | 广州电器科学研究院 | Resistance heat and ultrasonic vibration compound heating soldering equipment |
| DE102012215210A1 (en) * | 2012-08-28 | 2014-03-06 | Voith Patent Gmbh | Connecting device for connecting terminal web section of e.g. paper web, of screw nut roller for paper machine, has sonotrodes connecting terminal web section to material web with roller portion by ultrasonic welding by seam |
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