A welding system and method for reducing porosity of aluminum alloy laser-arc hybrid welding

Abstract

The present invention relates to a welding system and method for reducing porosity in aluminum alloy laser-arc hybrid welding, comprising: a vibration device and a probe, wherein the vibration device drives the probe to vibrate, and the probe comprises a spiral stirring portion. The present invention ensures sufficient flow of the molten pool metal through the stirring and vibration action of the probe, so that small bubbles in the molten pool gather, grow and float out of the molten pool, thereby reducing the risk of pores in the weld, improving the welding quality of the aluminum alloy, and solving the problem of high porosity in aluminum alloy laser-arc hybrid welding. The present invention slows down the solidification rate of the liquid metal in the molten pool through a heating probe, thereby solving the problem of uneven weld composition caused by excessive cooling rate and insufficient flow of the molten pool.

Description

Technical Field

[0001] The invention relates to the field of welding, and in particular to a welding system and method for reducing pores in aluminum alloy laser-arc hybrid welding. Background Art

[0002] Due to the high thermal conductivity, low ionization energy and laser reflection of aluminum alloy, the welding process is very unstable and the keyhole is prone to collapse, resulting in porosity defects. In addition, due to the high welding speed of aluminum alloy laser-arc hybrid welding, the fast cooling speed of the molten pool, and the narrow and deep molten pool, the gas inside the molten pool has no time to escape before the weld solidifies, which increases the risk of porosity in aluminum alloy welds. Too fast cooling of the molten pool can also easily lead to uneven weld composition and component segregation, resulting in reduced joint performance. Summary of the invention

[0003] The present invention aims to solve the above-mentioned problems and provides a welding system and method for reducing the porosity of aluminum alloy laser-arc hybrid welding, which solves the problem of high porosity of thick plate aluminum alloy laser-arc hybrid welding and the problem of uneven weld composition caused by excessive cooling rate and insufficient molten pool flow.

[0004] A welding system for reducing aluminum alloy laser-arc hybrid welding pores comprises a vibration device and a probe. The vibration device drives the probe to vibrate, and the probe comprises a spiral stirring portion.

[0005] Furthermore, the probe also includes a linear first connecting part, the stirring part and the first connecting part are integrally formed, the vibration device includes an ultrasonic generator, a transducer and a horn, the ultrasonic generator is electrically connected to the transducer, the transducer is fixedly connected to the horn, and the horn drives the stirring part and the first connecting part to vibrate.

[0006] Furthermore, it also includes a first clamp, the first clamp is fixedly connected to the amplitude transformer, and the first clamp is detachably connected to the first connecting part.

[0007] Furthermore, it also includes a first chuck, a first shell, a motor and a second chuck, the amplitude changing rod is fixedly connected to the second chuck, the second chuck is fixedly connected to the first shell, the motor is located inside the first shell and fixedly connected to the first shell, the output shaft of the motor is fixedly connected to the first chuck, and the upper end of the first connecting part is fixedly connected to the first chuck after passing through the first shell.

[0008] Furthermore, it also includes a heating wire and a conductive slip ring, the probe also includes a second connecting part, the stirring part, the first connecting part and the second connecting part are all hollow tubes,

[0009] One end of the stirring part away from the first connection part is integrally formed with and communicated with the second connection part, and one end of the second connection part away from the stirring part is fixedly connected to and communicated with the first connection part.

[0010] The conductive slip ring is located inside the first housing, the stator of the conductive slip ring is fixedly connected to the inner wall of the first housing, the output shaft of the motor passes through the rotor of the conductive slip ring and is fixedly connected to the rotor of the conductive slip ring,

[0011] The heating wire passes through the first connection part, the stirring part and the second connection part in sequence and then returns to the first connection part. Both ends of the heating wire pass through the first connection part respectively and are electrically connected to the rotor output line of the rotor of the conductive slip ring. The stator output line of the stator of the conductive slip ring passes through the first shell.

[0012] Furthermore, it also includes a first chuck, a first shell, a motor, a second chuck, an electric push rod and a second shell, the amplitude changing rod is fixedly connected to the second chuck, the second chuck is fixedly connected to the first shell, the electric push rod is located inside the first shell and fixedly connected to the first shell, the push rod of the electric push rod is fixedly connected to the second shell, the second shell is slidably connected to the inner wall of the first shell, the motor is located inside the second shell and fixedly connected to the second shell, the output shaft of the motor is fixedly connected to the first chuck, and the upper end of the first connecting part is fixedly connected to the first chuck after passing through the first shell.

[0013] Furthermore, it also includes a heating wire and a conductive slip ring, the probe also includes a second connecting part, and the stirring part, the first connecting part and the second connecting part are all hollow tubes.

[0014] One end of the stirring part away from the first connection part is integrally formed with and communicated with the second connection part, and one end of the second connection part away from the stirring part is fixedly connected to and communicated with the first connection part.

[0015] The conductive slip ring is located inside the second housing, the stator of the conductive slip ring is fixedly connected to the inner wall of the second housing, the output shaft of the motor passes through the rotor of the conductive slip ring and is fixedly connected to the rotor of the conductive slip ring,

[0016] The heating wire passes through the first connection part, the stirring part and the second connection part in sequence and then returns to the first connection part. Both ends of the heating wire pass through the first connection part respectively and are electrically connected to the rotor output line of the rotor of the conductive slip ring. The stator output line of the stator of the conductive slip ring passes through the second shell and the first shell.

[0017] Furthermore, it also includes a first chuck, a first shell, a motor, and a coil, wherein the first shell is fixedly connected to the amplitude transformer, the shell of the motor is fixedly connected to the inner wall of the first shell, the output shaft of the motor extends out of the first shell and is rotatably connected to the first shell, the output shaft of the motor is fixedly connected to the first chuck, the first chuck is detachably connected to the first connecting part, the motor drives the stirring part to rotate eccentrically, the stirring part is made of ferrous material, a ceramic coating is fixedly provided on the outer side of the stirring part, the coil is located above the stirring part, and the coil is used to heat the stirring part;

[0018] It also includes a mounting plate and a connecting rod, the coil is fixedly connected to the mounting plate, and two ends of the connecting rod are respectively fixedly connected to the first shell and the mounting plate.

[0019] Furthermore, it also includes a laser welding system and an arc welding system, and the probe is used to stir the molten pool formed by the laser welding system and the arc welding system on the aluminum-containing workpiece.

[0020] A method for using the welding system for reducing aluminum alloy laser-arc hybrid welding porosity comprises the following steps:

[0021] Step 1: Install and fix the aluminum workpiece on the workbench and adjust the welding gap;

[0022] Step 2: Adjust the laser welding system and arc welding system so that their parameters meet the process requirements;

[0023] Step 3: Position the probe just above the gap of the aluminum workpiece;

[0024] Step 4: Start the laser welding system and the arc welding system and start welding. At this time, a molten pool appears at the weld position;

[0025] Step 5: Start the vibration device and heat the probe, so that the probe is inserted into the molten pool. Under the stirring and vibration of the probe, the metal in the molten pool flows fully, and the small bubbles in the molten pool gather and grow and float out of the molten pool, thereby reducing the risk of pores in the weld;

[0026] Step 6: Before welding is finished, turn off the vibration device in advance to remove the probe from the molten pool in advance.

[0027] The present invention has the following advantages: the present invention ensures the full flow of the molten pool metal through the stirring and vibration of the probe, so that the small bubbles in the molten pool gather and grow and float out of the molten pool, thereby reducing the risk of pores in the weld and improving the welding quality of the aluminum alloy. The use of the probe not only increases the fluidity of the molten pool, but also promotes the escape of gas in the molten pool through vibration, thereby solving the problem of high porosity in laser-arc hybrid welding of thick plate aluminum alloy. In addition, compared with the overall vibration welding platform or vibration device driving the welded parts to achieve vibration, the present invention can avoid the overall vibration of the weldment, reduce the difficulty of welding, and prevent the weldment from cracking at the beginning of welding due to vibration.

[0028] The solidification rate of the liquid metal in the molten pool is slowed down by a heated probe, which solves the problem of uneven weld composition caused by excessive cooling rate and insufficient molten pool flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0030] Figure 1 : A schematic diagram of the three-dimensional structure of the stirring portion of the present invention;

[0031] Figure 2 : A schematic diagram of the structure of the first embodiment;

[0032] Figure 3 : A schematic diagram of the structure of the second embodiment;

[0033] Figure 4 : A schematic diagram of the structure of the third embodiment;

[0034] Figure 5 : A schematic structural diagram of the fourth embodiment;

[0035] Figure 6 : Schematic diagram of the three-dimensional structure of the present invention. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings and examples:

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] Embodiment 1:

[0041] like Figure 1 , Figure 2 and Figure 6 As shown, this embodiment provides a welding system for reducing porosity in aluminum alloy laser-arc hybrid welding, including: a vibration device and a probe, wherein the vibration device drives the probe 1 to vibrate, and the probe 1 includes a spiral stirring portion 11.

[0042] Furthermore, the probe 1 also includes a linear first connecting part 12, the stirring part 11 and the first connecting part 12 are integrally formed, the vibration device includes an ultrasonic generator 31, a transducer 32 and a horn 33, the ultrasonic generator 31 is electrically connected to the transducer 32, the transducer 32 is fixedly connected to the horn 33, and the horn 33 drives the stirring part 11 and the first connecting part 12 to vibrate.

[0043] Furthermore, it also includes a first clamp 4 , wherein the first clamp 4 is fixedly connected to the amplitude transformer 33 , and the first clamp 4 is detachably connected to the first connecting portion 12 .

[0044] Furthermore, the probe 1 has a diameter of 0.1 mm-1 mm and is made of high temperature resistant metal tungsten.

[0045] Working principle:

[0046] Step 1: Install and fix the aluminum workpiece 10 on the workbench and adjust the welding gap;

[0047] Step 2: Adjust the laser welding system 8 and the arc welding system 9 so that their parameters meet the process requirements;

[0048] Step 3: Position the probe 1 just above the gap of the aluminum workpiece 10;

[0049] Step 4: Start the laser welding system 8 and the arc welding system 9 to start welding, and a molten pool 100 appears at the position of the weld 101;

[0050] Step 5: Start the vibration device to extend the probe 1 into the molten pool 100. Under the vibration of the probe 1, the metal in the molten pool 100 fully flows, and the small bubbles in the molten pool 100 gather and grow and float out of the molten pool 100, thereby reducing the risk of pores in the weld 101.

[0051] Step 6: Before welding is finished, the vibration device is turned off in advance so that the probe 1 is withdrawn from the molten pool 100 in advance.

[0052] The probe 1 moves synchronously with the laser welding system 8 and the arc welding system 9, and the housing of the transducer 32 is connected to the lifting device, which drives the transducer 32 and the probe 1 to move up and down synchronously. The lifting device can be installed on a mechanical arm or a welding carriage on which the laser welding system 8 and the arc welding system 9 are installed, so as to ensure that the probe 1 moves synchronously with the laser welding system 8 and the arc welding system 9.

[0053] The spring-shaped spiral stirring portion 11 can increase the contact area with the liquid metal in the molten pool 100 , so that the liquid metal in the entire molten pool 100 is in a high-frequency vibration state, thereby allowing the bubbles in the molten pool 100 to fully escape from the molten pool 100 .

[0054] The spring-shaped spiral stirring portion 11 has a spring-retractable elastic property. In addition to the circumferential vibration displacement, the stirring portion 11 has an up-and-down vibration displacement through its own expansion and contraction, so that the liquid metal in the molten pool 100 can be stirred more fully.

[0055] in, Figure 6 The welding direction in is from right to left.

[0056] Embodiment 2:

[0057] like Figure 3 and Figure 6 As shown, this embodiment provides a welding system for reducing porosity in aluminum alloy laser-arc hybrid welding, including: a vibration device and a probe, wherein the vibration device drives the probe 1 to vibrate, and the probe 1 includes a spiral stirring portion 11.

[0058] Furthermore, the probe 1 also includes a linear first connecting part 12, the stirring part 11 and the first connecting part 12 are integrally formed, the vibration device includes an ultrasonic generator 31, a transducer 32 and a horn 33, the ultrasonic generator 31 is electrically connected to the transducer 32, the transducer 32 is fixedly connected to the horn 33, and the horn 33 drives the stirring part 11 and the first connecting part 12 to vibrate.

[0059] Furthermore, it also includes a first chuck 4, a first shell 5, a motor 6 and a second chuck 34, the amplitude changing rod 33 is fixedly connected to the second chuck 34, the second chuck 34 is fixedly connected to the first shell 5, the motor 6 is located inside the first shell 5 and is fixedly connected to the first shell 5, the output shaft of the motor 6 is fixedly connected to the first chuck 4, and the upper end of the first connecting portion 12 is fixedly connected to the first chuck 4 after passing through the first shell 5.

[0060] Furthermore, it also includes a heating wire 2 and a conductive slip ring 51, and the probe 1 also includes a second connecting part 13. The stirring part 11, the first connecting part 12 and the second connecting part 13 are all hollow tubes.

[0061] One end of the stirring portion 11 away from the first connection portion 12 is integrally formed with and communicated with the second connection portion 13 , and one end of the second connection portion 13 away from the stirring portion 11 is fixedly connected to and communicated with the first connection portion 12 .

[0062] The conductive slip ring 51 is located inside the first housing 5, the stator of the conductive slip ring 51 is fixedly connected to the inner wall of the first housing 5, and the output shaft of the motor 6 passes through the rotor of the conductive slip ring 51 and is fixedly connected to the rotor of the conductive slip ring 51.

[0063] The heating wire 2 passes through the first connection part 12, the stirring part 11 and the second connection part 13 in sequence and then returns to the first connection part 12. Both ends of the heating wire 2 pass through the first connection part 12 respectively and are electrically connected to the rotor output line of the rotor of the conductive slip ring 51. The stator output line of the stator of the conductive slip ring 51 passes through the first shell 5.

[0064] Furthermore, the heating wire 2 has a diameter of 0.1 mm to 1 mm and is made of high-temperature resistant metal tungsten. The probe 1 is made of a high-temperature resistant and non-conductive material, such as a ceramic material.

[0065] Working principle:

[0066] Step 1: Install and fix the aluminum workpiece 10 on the workbench and adjust the welding gap;

[0067] Step 2: Adjust the laser welding system 8 and the arc welding system 9 so that their parameters meet the process requirements;

[0068] Step 3: Position the probe 1 just above the gap of the aluminum workpiece 10;

[0069] Step 4: Start the laser welding system 8 and the arc welding system 9 to start welding, and a molten pool 100 appears at the position of the weld 101;

[0070] Step 5: Start the vibration device and heat the probe 1, so that the probe 1 is inserted into the molten pool 100. Under the eccentric rotation and high-frequency vibration of the stirring part 11, the metal in the molten pool 100 fully flows, and the small bubbles in the molten pool 100 gather and grow, and float out of the molten pool 100, thereby reducing the risk of pores in the weld 101.

[0071] Step 6: Before welding is finished, the vibration device is turned off in advance so that the probe 1 is withdrawn from the molten pool 100 in advance.

[0072] The probe 1 moves synchronously with the laser welding system 8 and the arc welding system 9, and the housing of the transducer 32 is connected to the lifting device, which drives the transducer 32 and the probe 1 to move up and down synchronously. The lifting device can be installed on a mechanical arm or a welding carriage on which the laser welding system 8 and the arc welding system 9 are installed, so as to ensure that the probe 1 moves synchronously with the laser welding system 8 and the arc welding system 9.

[0073] The spring-shaped spiral stirring portion 11 can increase the contact area with the liquid metal in the molten pool 100, so that the liquid metal in the entire molten pool 100 is in a high-frequency vibration state, so that the bubbles in the molten pool 100 can fully escape from the molten pool 100. At the same time, the heating wire 2 is energized to generate heat, thereby slowing down the cooling speed of the liquid metal in the molten pool 100, so that the bubbles in the molten pool 100 have time to fully escape.

[0074] in, Figure 3 and Figure 6 The welding direction is from right to left. The ultrasonic generator 31, the transducer 32, the horn 33, the motor 6 and the conductive slip ring 51 are all existing technologies, and the internal structure is not shown in the figure.

[0075] Embodiment three:

[0076] like Figure 4 and Figure 6 As shown, this embodiment provides a welding system for reducing porosity in aluminum alloy laser-arc hybrid welding, including: a vibration device and a probe, wherein the vibration device drives the probe 1 to vibrate, and the probe 1 includes a spiral stirring portion 11.

[0077] Furthermore, the probe 1 also includes a linear first connecting part 12, the stirring part 11 and the first connecting part 12 are integrally formed, the vibration device includes an ultrasonic generator 31, a transducer 32 and a horn 33, the ultrasonic generator 31 is electrically connected to the transducer 32, the transducer 32 is fixedly connected to the horn 33, and the horn 33 drives the stirring part 11 and the first connecting part 12 to vibrate.

[0078] Furthermore, it also includes a first chuck 4, a first shell 5, a motor 6, a second chuck 34, an electric push rod 52 and a second shell 53, the amplitude changing rod 33 is fixedly connected to the second chuck 34, the second chuck 34 is fixedly connected to the first shell 5, the electric push rod 52 is located inside the first shell 5 and is fixedly connected to the first shell 5, the push rod of the electric push rod 52 is fixedly connected to the second shell 53, the second shell 53 is slidably connected to the inner wall of the first shell 5, the motor 6 is located inside the second shell 53 and is fixedly connected to the second shell 53, the output shaft of the motor 6 is fixedly connected to the first chuck 4, and the upper end of the first connecting portion 12 is fixedly connected to the first chuck 4 after passing through the first shell 5.

[0079] Furthermore, it also includes a heating wire 2 and a conductive slip ring 51, and the probe 1 also includes a second connecting part 13. The stirring part 11, the first connecting part 12 and the second connecting part 13 are all hollow tubes.

[0080] One end of the stirring portion 11 away from the first connection portion 12 is integrally formed with and communicated with the second connection portion 13 , and one end of the second connection portion 13 away from the stirring portion 11 is fixedly connected to and communicated with the first connection portion 12 .

[0081] The conductive slip ring 51 is located inside the second housing 53, the stator of the conductive slip ring 51 is fixedly connected to the inner wall of the second housing 53, and the output shaft of the motor 6 passes through the rotor of the conductive slip ring 51 and is fixedly connected to the rotor of the conductive slip ring 51.

[0082] The heating wire 2 passes through the first connecting part 12, the stirring part 11 and the second connecting part 13 in sequence and then returns to the first connecting part 12. Both ends of the heating wire 2 pass through the first connecting part 12 respectively and are electrically connected to the rotor output line of the rotor of the conductive slip ring 51. The stator output line of the stator of the conductive slip ring 51 passes through the second shell 53 and the first shell 5.

[0083] Furthermore, the heating wire 2 has a diameter of 0.1 mm to 1 mm and is made of high-temperature resistant metal tungsten. The probe 1 is made of a high-temperature resistant and non-conductive material, such as a ceramic material.

[0084] Working principle:

[0085] Step 1: Install and fix the aluminum workpiece 10 on the workbench and adjust the welding gap;

[0086] Step 2: Adjust the laser welding system 8 and the arc welding system 9 so that their parameters meet the process requirements;

[0087] Step 3: Position the probe 1 just above the gap of the aluminum workpiece 10;

[0088] Step 4: Start the laser welding system 8 and the arc welding system 9 to start welding, and a molten pool 100 appears at the position of the weld 101;

[0089] Step 5: Start the vibration device and heat the probe 1, the electric push rod 52 drives the probe 1 to extend into the molten pool 100, under the eccentric rotation and high-frequency vibration of the probe 1, and the electric push rod 52 drives the probe 1 to move up and down in the molten pool 100 (at this time, the probe 1 is not completely pulled out of the molten pool 100), the liquid metal in the molten pool 100 flows fully, and the small bubbles in the molten pool 100 gather and grow, and float out of the molten pool 100, thereby reducing the risk of pores in the weld 101;

[0090] Step 6: Before the welding is finished, the vibration device is turned off in advance, and the electric push rod 52 drives the probe 1 to be withdrawn from the molten pool 100 in advance.

[0091] Among them, the probe 1 moves synchronously with the laser welding system 8 and the arc welding system 9, and the housing of the transducer 32 is installed on a robotic arm or a welding carriage on which the laser welding system 8 and the arc welding system 9 are installed, thereby ensuring that the probe 1 moves synchronously with the laser welding system 8 and the arc welding system 9.

[0092] The spring-shaped spiral stirring portion 11 can increase the contact area with the liquid metal in the molten pool 100, so that the liquid metal in the entire molten pool 100 is in a high-frequency vibration state, so that the bubbles in the molten pool 100 can fully escape from the molten pool 100. At the same time, the heating wire 2 is energized to generate heat, thereby slowing down the cooling speed of the liquid metal in the molten pool 100, so that the bubbles in the molten pool 100 have time to fully escape.

[0093] In this embodiment, the probe 1 is pulled out of the molten pool 100 without moving the first shell 5 and other components as a whole, so that the weight and inertia of the components moving up and down are small, which facilitates the rapid movement of the probe 1 in the molten pool 100.

[0094] in, Figure 6 The welding direction is from right to left. The ultrasonic generator 31, the transducer 32, the horn 33, the motor 6 and the conductive slip ring 51 are all existing technologies, and the internal structure is not shown in the figure.

[0095] Embodiment 4:

[0096] like Figure 5 and Figure 6 As shown, this embodiment provides a welding system for reducing porosity in aluminum alloy laser-arc hybrid welding, including: a vibration device and a probe, wherein the vibration device drives the probe 1 to vibrate, and the probe 1 includes a spiral stirring portion 11.

[0097] Furthermore, the probe 1 also includes a linear first connecting part 12, the stirring part 11 and the first connecting part 12 are integrally formed, the vibration device includes an ultrasonic generator 31, a transducer 32 and a horn 33, the ultrasonic generator 31 is electrically connected to the transducer 32, the transducer 32 is fixedly connected to the horn 33, and the horn 33 drives the stirring part 11 and the first connecting part 12 to vibrate.

[0098] Furthermore, it also includes a first chuck 4, a first shell 5, a motor 6, and a coil 7. The first shell 5 is fixedly connected to the amplitude transformer 33. The shell of the motor 6 is fixedly connected to the inner wall of the first shell 5. The output shaft of the motor 6 extends out of the first shell 5 and is rotatably connected to the first shell 5. The output shaft of the motor 6 is fixedly connected to the first chuck 4. The first chuck 4 is detachably connected to the first connecting portion 12. The motor 6 drives the stirring portion 11 to rotate eccentrically. The stirring portion 11 is made of ferrous material. A ceramic coating 111 is fixedly provided on the outer side of the stirring portion 11. The coil 7 is located above the stirring portion 11. The coil 7 is used to heat the stirring portion 11.

[0099] It also includes a mounting plate 71 and a connecting rod 72 . The coil 7 is fixedly connected to the mounting plate 71 , and two ends of the connecting rod 72 are fixedly connected to the first housing 5 and the mounting plate 71 , respectively.

[0100] Furthermore, it also includes a laser welding system 8 and an arc welding system 9 , and the probe 1 is used to stir the molten pool 100 formed by the laser welding system 8 and the arc welding system 9 on the aluminum-containing workpiece 10 .

[0101] Furthermore, the probe 1 has a diameter of 0.1 mm to 1 mm and is made of high temperature resistant stainless steel.

[0102] Working principle:

[0103] Step 1: Install and fix the aluminum workpiece 10 on the workbench and adjust the welding gap;

[0104] Step 2: Adjust the laser welding system 8 and the arc welding system 9 so that their parameters meet the process requirements;

[0105] Step 3: Position the probe 1 just above the gap of the aluminum workpiece 10;

[0106] Step 4: Start the laser welding system 8 and the arc welding system 9 to start welding, and a molten pool 100 appears at the position of the weld 101;

[0107] Step 5: Start the vibration device and energize the coil 7. The coil 7 heats the probe 1 through the principle of electromagnetic induction, so that the probe 1 extends into the molten pool 100. Under the stirring and high-frequency vibration of the probe 1, the metal in the molten pool 100 fully flows, and the small bubbles in the molten pool 100 gather and grow, and float out of the molten pool 100, thereby reducing the risk of pores in the weld 101.

[0108] Step 6: Before welding is finished, the vibration device is turned off in advance so that the probe 1 is withdrawn from the molten pool 100 in advance.

[0109] The probe 1 moves synchronously with the laser welding system 8 and the arc welding system 9, and the housing of the transducer 32 is connected to the lifting device, which drives the transducer 32 and the probe 1 to move up and down synchronously. The lifting device can be installed on a mechanical arm or a welding carriage on which the laser welding system 8 and the arc welding system 9 are installed, so as to ensure that the probe 1 moves synchronously with the laser welding system 8 and the arc welding system 9.

[0110] The spring-shaped spiral stirring portion 11 can increase the contact area with the liquid metal in the molten pool 100, so that the liquid metal in the entire molten pool 100 is in a high-frequency vibration state, so that the bubbles in the molten pool 100 can fully escape from the molten pool 100. At the same time, the stirring portion 11 itself generates heat, thereby slowing down the cooling speed of the liquid metal in the molten pool 100, so that the bubbles in the molten pool 100 have time to fully escape.

[0111] The ceramic coating 111 can prevent the melted aluminum from adhering and solidifying on the outside of the stirring portion 11 .

[0112] in, Figure 6 The welding direction is from right to left. The ultrasonic generator 31, the transducer 32, the horn 33, the motor 6 and other components are all prior art, and the internal structure is not shown in the figure.

[0113] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments, and any changes or modifications made based on the present invention belong to the scope of protection claimed by the present invention.

Claims

1. A welding system for reducing porosity in aluminum alloy laser-arc hybrid welding, characterized in that: include: A vibration device, a probe and a coil (7), wherein the vibration device drives the probe (1) to vibrate, the probe (1) comprising a spiral stirring portion (11); the stirring portion (11) is made of an iron-containing material, a ceramic coating (111) is fixedly provided on the outside of the stirring portion (11), the coil (7) is located above the stirring portion (11), the coil (7) is used to heat the stirring portion (11), and the stirring portion (11) is used to stir the molten pool (100).

2. A welding system for reducing porosity in aluminum alloy laser-arc hybrid welding according to claim 1, characterized in that: The probe (1) further comprises a linear first connecting portion (12); the stirring portion (11) and the first connecting portion (12) are integrally formed; the vibration device comprises an ultrasonic generator (31), a transducer (32) and an amplitude transformer (33); the ultrasonic generator (31) is electrically connected to the transducer (32); the transducer (32) is fixedly connected to the amplitude transformer (33); and the amplitude transformer (33) drives the stirring portion (11) and the first connecting portion (12) to vibrate.

3. A welding system for reducing porosity in aluminum alloy laser-arc hybrid welding according to claim 2, characterized in that: It also comprises a first clamp (4), wherein the first clamp (4) is fixedly connected to the amplitude transformer (33), and the first clamp (4) is detachably connected to the first connecting portion (12).

4. The welding system for reducing porosity in aluminum alloy laser-arc hybrid welding according to claim 2, characterized in that: The invention also comprises a first clamp (4), a first shell (5), a motor (6) and a second clamp (34), wherein the amplitude changing rod (33) is fixedly connected to the second clamp (34), the second clamp (34) is fixedly connected to the first shell (5), the motor (6) is located inside the first shell (5) and is fixedly connected to the first shell (5), the output shaft of the motor (6) is fixedly connected to the first clamp (4), and the upper end of the first connecting portion (12) is fixedly connected to the first clamp (4) after passing through the first shell (5).

5. A welding system for reducing porosity in aluminum alloy laser-arc hybrid welding according to claim 4, characterized in that: It also includes a heating wire (2) and a conductive slip ring (51), the probe (1) also includes a second connecting part (13), the stirring part (11), the first connecting part (12) and the second connecting part (13) are all hollow tubes, One end of the stirring portion (11) away from the first connecting portion (12) is integrally formed with and communicates with the second connecting portion (13); one end of the second connecting portion (13) away from the stirring portion (11) is fixedly connected to and communicates with the first connecting portion (12); The conductive slip ring (51) is located inside the first housing (5); the stator of the conductive slip ring (51) is fixedly connected to the inner wall of the first housing (5); the output shaft of the motor (6) passes through the rotor of the conductive slip ring (51) and is fixedly connected to the rotor of the conductive slip ring (51); The heating wire (2) passes through the first connection part (12), the stirring part (11) and the second connection part (13) in sequence and then returns to the inside of the first connection part (12); both ends of the heating wire (2) respectively pass through the first connection part (12) and are electrically connected to the rotor output wire of the rotor of the conductive slip ring (51); and the stator output wire of the stator of the conductive slip ring (51) passes through the first shell (5).

6. The welding system for reducing porosity in aluminum alloy laser-arc hybrid welding according to claim 2, characterized in that: The invention also comprises a first chuck (4), a first shell (5), a motor (6), a second chuck (34), an electric push rod (52) and a second shell (53), wherein the amplitude changing rod (33) is fixedly connected to the second chuck (34), the second chuck (34) is fixedly connected to the first shell (5), the electric push rod (52) is located inside the first shell (5) and is fixedly connected to the first shell (5), the push rod of the electric push rod (52) is fixedly connected to the second shell (53), the second shell (53) is slidably connected to the inner wall of the first shell (5), the motor (6) is located inside the second shell (53) and is fixedly connected to the second shell (53), the output shaft of the motor (6) is fixedly connected to the first chuck (4), and the upper end of the first connecting portion (12) is fixedly connected to the first chuck (4) after passing through the first shell (5).

7. A welding system for reducing porosity in aluminum alloy laser-arc hybrid welding according to claim 6, characterized in that: It also includes a heating wire (2) and a conductive slip ring (51), the probe (1) also includes a second connecting part (13), the stirring part (11), the first connecting part (12) and the second connecting part (13) are all hollow tubes, One end of the stirring portion (11) away from the first connecting portion (12) is integrally formed with and communicates with the second connecting portion (13); one end of the second connecting portion (13) away from the stirring portion (11) is fixedly connected to and communicates with the first connecting portion (12); The conductive slip ring (51) is located inside the second housing (53); the stator of the conductive slip ring (51) is fixedly connected to the inner wall of the second housing (53); the output shaft of the motor (6) passes through the rotor of the conductive slip ring (51) and is fixedly connected to the rotor of the conductive slip ring (51); The heating wire (2) passes through the first connection part (12), the stirring part (11) and the second connection part (13) in sequence and then returns to the interior of the first connection part (12); both ends of the heating wire (2) respectively pass through the first connection part (12) and are electrically connected to the rotor output wire of the rotor of the conductive slip ring (51); and the stator output wire of the stator of the conductive slip ring (51) passes through the second shell (53) and the first shell (5).

8. The welding system for reducing porosity in aluminum alloy laser-arc hybrid welding according to claim 2, characterized in that: It also comprises a first chuck (4), a first shell (5), a motor (6), and a coil (7), wherein the first shell (5) is fixedly connected to the amplitude transformer (33), the shell of the motor (6) is fixedly connected to the inner wall of the first shell (5), the output shaft of the motor (6) extends out of the first shell (5) and is rotatably connected to the first shell (5), the output shaft of the motor (6) is fixedly connected to the first chuck (4), the first chuck (4) is detachably connected to the first connecting portion (12), and the motor (6) drives the stirring portion (11) to rotate eccentrically; It also includes a mounting plate (71) and a connecting rod (72), the coil (7) being fixedly connected to the mounting plate (71), and two ends of the connecting rod (72) being fixedly connected to the first housing (5) and the mounting plate (71), respectively.

9. The welding system for reducing porosity in aluminum alloy laser-arc hybrid welding according to claim 1, characterized in that: Also included are a laser welding system (8) and an arc welding system (9), wherein the probe (1) is used to stir a molten pool (100) formed on an aluminum workpiece (10) by the laser welding system (8) and the arc welding system (9).

10. A method for reducing porosity in aluminum alloy laser-arc hybrid welding using the welding system according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Fix the aluminum workpiece (10) on the workbench and adjust the welding gap; Step 2: adjusting the laser welding system (8) and the arc welding system (9) so that their parameters meet the process requirements; Step 3: Position the probe (1) directly above the gap containing the aluminum workpiece (10); Step 4: Start the laser welding system (8) and the arc welding system (9) to start welding, at which point a molten pool (100) appears at the weld (101); Step 5: starting the vibration device and heating the probe (1), so that the probe (1) is inserted into the molten pool (100); under the stirring and vibration of the probe (1), the metal in the molten pool (100) fully flows, and small bubbles in the molten pool (100) gather and grow, and float out of the molten pool (100), thereby reducing the risk of pores in the weld (101); Step 6: Before welding is finished, the vibration device is turned off in advance so that the probe (1) is withdrawn from the molten pool (100) in advance.

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