CN111390347A - Continuous-feeding double-welding-wire molten drop alternative transition control device and method - Google Patents
Continuous-feeding double-welding-wire molten drop alternative transition control device and method Download PDFInfo
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- CN111390347A CN111390347A CN202010157439.0A CN202010157439A CN111390347A CN 111390347 A CN111390347 A CN 111390347A CN 202010157439 A CN202010157439 A CN 202010157439A CN 111390347 A CN111390347 A CN 111390347A
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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
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
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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
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
- B23K10/027—Welding for purposes other than joining, e.g. build-up 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
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up 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
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a continuously-fed double-welding-wire molten drop alternative transition control device, which comprises a first wire feeder, a first wire feeding buffer, a first wire feeding pipe, a double-wire locking controller and a first wire feeding nozzle which are sequentially connected, and a second wire feeder, a second wire feeding buffer, a second wire feeding pipe, the double-wire locking controller and a second wire feeding nozzle which are sequentially connected; the first wire feed buffer is configured to buffer a first welding wire fed by the first wire feeder; the second wire feed buffer is configured to buffer a second welding wire fed by the second wire feeder; the double-wire locking controller is configured to lock the first welding wire fed out by the first wire feeding pipe or lock the second welding wire fed out by the second wire feeding pipe. The invention also discloses a corresponding control method. The invention has simple equipment and accurate wire feeding control method, can improve the stability of the molten pool, finally obtains the welding line and the stacking layer which are uniformly mixed and well formed, and obviously improves the composition segregation.
Description
Technical Field
The invention relates to the technical field of additive manufacturing welding, in particular to a continuously-fed double-welding-wire molten drop alternative transition control device and method.
Background
Additive manufacturing is an advanced digital manufacturing technology based on a layer-by-layer cladding principle. According to a three-dimensional digital model input into a computer, the additive manufacturing adopts an electric arc generated by Metal Inert Gas (MIG), Tungsten Inert Gas (TIG) or a plasma welding power supply (PA) to melt a welding wire, and a target part is gradually formed from line to surface and then to body.
Patent CN204735824U discloses a twin-wire feeding device, which is composed of two independent wire feeders, an air supply system, a control panel, and a remote controller. The two wire feeders are mutually independent, and the work of the wire feeder is controlled by a remote controller or a switch of the wire feeder. Patent CN110722249A discloses a method for bimetal electric arc additive manufacturing by using a plasma heat source, wherein additive manufacturing software controls the wire feeding of two metal welding wires, so as to realize alternate cladding of two welding wires in each section of additive welding pass and alternate staggering of welding wires in adjacent additive welding passes. Patent CN 108067715 discloses a plasma arc dual cold-filling wire additive manufacturing method and device, which includes two wire feeding nozzles and their clamps, two wire feeding machines, a dual wire coordination controller, a robot control cabinet, etc. When the wire feeding robot is used, the robot sends a control signal to the double-wire coordination controller, and the two wires are fed synchronously, asynchronously or alternately and stopped.
The device or the method has good effect of melting the same material or welding wires with good compatibility, but the welding wires made of different materials with large difference in melting property often generate molten drop splashing and cannot be formed by co-melting. For example, when a combination of wires of different materials such as titanium-aluminum or steel-aluminum is used to produce an intermetallic compound, the two materials need to be fed simultaneously. At the moment, two welding wires are melted in the same electric arc to form molten drops, and when the molten drops fall into a molten pool at the same time, the molten drops are always splashed, so that the molten drops cannot be formed in a co-melting mode.
Therefore, those skilled in the art are dedicated to develop a continuously feeding device and method for controlling the alternation and transition of double-wire molten drops, so that the molten drops made of different materials can be stably transited into a molten pool, the stability of the molten pool is improved, and finally, a welding seam and a stack layer which are uniformly mixed and well formed are obtained, and the composition segregation is obviously improved.
Disclosure of Invention
In view of the above-mentioned defects of the prior art, the present invention is directed to a continuous double-wire droplet alternation transition control device and method for stably transitioning droplets of different materials into a molten pool, improving the stability of the molten pool, and finally obtaining a well-formed weld.
In order to achieve the above purpose, the invention provides a continuously-fed double-wire molten drop alternative transition control device, which comprises a first wire feeder, a first wire feeding buffer, a first wire feeding pipe, a double-wire locking controller and a first wire feeding nozzle which are connected in sequence, and a second wire feeder, a second wire feeding buffer, a second wire feeding pipe, the double-wire locking controller and a second wire feeding nozzle which are connected in sequence; the first wire feed buffer is configured to directly feed or buffer a first welding wire fed by the first wire feeder; the second wire feed buffer is configured to directly feed or buffer a second welding wire fed by the second wire feeder; the dual wire locking controller is configured to lock the first welding wire fed out by the first wire feeding tube or lock the second welding wire fed out by the second wire feeding tube.
Further, the twin wire locking controller includes an activation control switch configured to control a switching time interval of locking the first welding wire or the second welding wire.
Further, the first wire feeding nozzle and the second wire feeding nozzle are made of copper or ceramic; preferably, it is copper.
Further, the first wire feed buffer and the second wire feed buffer comprise stainless steel.
Further, the first wire feeding pipe and the second wire feeding pipe are made of metal materials.
Further, the first wire feed tube inner diameter matches the first wire diameter; the second wire feed tube inner diameter matches the second wire diameter.
Further, the first wire feed buffer is also configured to preheat the first welding wire from the first wire feeder; the second wire feed buffer is further configured to preheat the second welding wire from the second wire feeder.
Further, an arc generating module is included, the arc generating module being configured to generate an arc, melting the first and/or second welding wire.
Further, the arc generation module comprises a plasma welding module.
Further, a welding power supply configured to provide power to the plasma welding module is also included.
Further, the welding device further comprises a blowing module, wherein the blowing module is configured to protect a molten pool formed by welding through blowing.
Further, the invention also discloses a continuously-fed double-welding-wire molten drop alternative transition control method, which comprises the following steps:
and 3, repeating the step 2 until the welding process is finished.
In a preferred embodiment of the present invention, the first welding wire-second welding wire includes a titanium wire-aluminum wire, or a steel wire-aluminum wire.
Compared with the prior art, the invention at least has the following beneficial technical effects:
1. the equipment is simple, the cost is low, and the switching time can be set according to actual requirements;
2. the wire feeding is accurate, the molten drops of the welding wires can be controlled to alternately enter a molten pool, interference factors caused by the fact that the molten drops of two welding wires simultaneously enter the molten pool are eliminated, and the quality of electric arc additive manufacturing is improved;
3. the influence of the angle of the welding wires sent to the molten pool and the distance and the arrangement mode of the welding wires on the performance of the welding material is reduced, and the requirements of the angle, the distance and the arrangement mode of the welding wires sent out to the molten pool between the two welding wires do not need to be considered;
4. the preheating function can be exerted on welding wire materials with high melting points, so that the alternative transition speed of double-wire molten drops is improved, the stability of a molten pool is improved, the accurate control of welding seam forming is really realized, and the qualified surfacing welding process standard is easier to obtain.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic diagram of an apparatus according to a preferred embodiment of the present invention.
Wherein: 1-a first wire feeder, 2-a second wire feeder, 3-a first wire feeding buffer, 4-a second wire feeding buffer, 5-a first wire feeding pipe, 6-a second wire feeding pipe, 7-a double-wire locking controller, 8-a first wire feeding nozzle and 9-a second wire feeding nozzle.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
Fig. 1 shows a continuously feeding double-wire droplet alternation transition control device according to the present embodiment, which includes a first wire feeder 1, a second wire feeder 2, a first wire feeding buffer 3, a second wire feeding buffer 4, a first wire feeding pipe 5, a second wire feeding pipe 6, a double-wire locking controller 7, a first wire feeding nozzle 8 and a second wire feeding nozzle 9.
The inner diameters of the first wire feeding pipe 5 and the second wire feeding pipe 6 are matched with welding wires and are respectively connected with a first wire feeding nozzle 8 and a second wire feeding nozzle 9 through a double-wire locking controller 7. Preferably, the first wire feeding mouth 8 and the second wire feeding mouth 9 are made of copper material or ceramic material to withstand the high temperature of the welding arc.
The twin-wire locking controller 7 can also be configured with an activation control switch to program the switching time interval for locking the twin wires.
In this embodiment, the first welding wire fed out by the first wire feeder 1 is a titanium wire with a diameter of 1 mm; the second welding wire sent out by the second wire feeder 2 is an aluminum wire with the diameter of 1 mm; the double-wire locking controller 7 is programmed to set the time interval of the double-wire switching of the locking to be 1 second. Correspondingly, the inner diameters of the first wire feeding pipe 5 and the first wire feeding nozzle 8 are 1 mm; the inner diameters of the second wire feeding pipe 6 and the second wire feeding nozzle 9 are 1 mm.
The method applying the device comprises the following steps:
step 1: starting a welding power supply to generate an electric arc; starting a first wire feeder 1 to send out a titanium wire into a first wire feeding buffer 3; simultaneously, the second wire feeder 2 is started, and the aluminum wires are sent out to enter a second wire feeding buffer 4; the first wire feeding buffer 3 directly feeds the titanium wire through the first wire feeding pipe 5 to the first wire feeding nozzle 8; the second wire feeding buffer 4 directly feeds the aluminum wires to pass through the second wire feeding pipe 6 and reach a second wire feeding nozzle 9; the length of the titanium wire extending out of the first wire feeding mouth 8 and the length of the aluminum wire extending out of the second wire feeding mouth 9 are 10-12 mm; starting the double-wire locking controller 7;
step 2: the double-wire locking controller 7 locks the titanium wire entering the first wire feeding nozzle 8 and loosens the aluminum wire entering the second wire feeding nozzle 9; the first wire feeder 1 continues to operate, the delivered titanium wires are buffered in the first wire feeding buffer 3, and no blockage occurs; the aluminum wire sent out by the second wire feeder 2 is sent into the arc center through a second wire feeding nozzle 9 to form molten drops which fall into a molten pool; when the time is 1 second, the double-wire locking controller 7 loosens the titanium wire entering the first wire feeding nozzle 8, the titanium wire is fed into the center of the electric arc through the first wire feeding nozzle 8 to form molten drops, the molten drops fall into a molten pool, meanwhile, the aluminum wire entering the second wire feeding nozzle 9 is locked, the second wire feeder 2 continues to feed the aluminum wire, the aluminum wire is buffered in the second wire feeding buffer 4, and the blockage cannot occur; when the time is 1 second, the double-wire locking controller 7 loosens the aluminum wire entering the second wire feeding nozzle 9 and locks the titanium wire entering the first wire feeding nozzle 8;
and step 3: and repeating the step 2 until the welding target is completed.
Considering that additive manufacturing generally takes longer and frequent adjustments of the wire feed speed of the wire feeder during processing increases wire feeder losses, the switching time for locking the first wire by the twin wire locking controller 7 may preferably be different from the switching time for locking the second wire. For example, the high melting point welding wire has a longer melting time, and the twin wire lock controller 7 can appropriately extend the locking time of the low melting point welding wire.
In addition, the first wire feeding buffer 3 or the second wire feeding buffer 4 can be further provided with a preheating module to preheat the welding wire material with high melting point, so that the double-wire molten drop alternative transition is improved, the stability of a molten pool is improved, the accurate control of wire feeding to welding seam forming is really realized, and qualified welding/surfacing welding process products are easier to obtain.
Through adjusting the matching of the corresponding switching time and preheating time of different welding wires, the welding efficiency can be further improved, and the welding wire is particularly suitable for double-wire welding, surfacing welding or additive manufacturing of dissimilar materials with large performance difference.
Considering the diameter of the welding wire and the possibility that a certain gap may need to be maintained between the wire feeding nozzle and the welding wire when welding, it is preferable that the first wire feeding nozzle or the second wire feeding nozzle is set to 0.6-2.4 mm.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A continuously-fed double-welding-wire molten drop alternative transition control device is characterized by comprising a first wire feeder, a first wire feeding buffer, a first wire feeding pipe, a double-wire locking controller and a first wire feeding nozzle which are sequentially connected, and a second wire feeder, a second wire feeding buffer, a second wire feeding pipe, the double-wire locking controller and a second wire feeding nozzle which are sequentially connected; the first wire feed buffer is configured to directly feed or buffer a first welding wire fed by the first wire feeder, and the second wire feed buffer is configured to directly feed or buffer a second welding wire fed by the second wire feeder; the dual wire locking controller is configured to lock the first welding wire fed out by the first wire feeding tube or lock the second welding wire fed out by the second wire feeding tube.
2. The continuously advancing dual wire droplet alternation transition control device of claim 1, wherein the dual wire locking controller comprises an activation control switch configured to control a switching time interval for locking the first wire or the second wire.
3. The continuously advancing dual wire droplet alternation transition control device of claim 1, wherein the material of the first wire feed nozzle and the second wire feed nozzle comprises copper or ceramic.
4. The continuously advancing dual wire droplet alternating transition control apparatus of claim 1, wherein the first wire feed tube inner diameter matches the first wire diameter; the second wire feed tube inner diameter matches the second wire diameter.
5. The continuously advancing dual wire droplet alternation transition control device of claim 1, wherein the first wire feed buffer is further configured to enable preheating of the first wire fed by the first wire feeder; the second wire feed buffer is further configured to preheat the second welding wire from the second wire feeder.
6. The continuously-fed dual wire droplet alternation transition control device of claim 1, further comprising an arc generation module configured to generate an arc to melt the first and/or second wire.
7. The continuously fed dual wire droplet alternation transition control device of claim 6, wherein the arc generation module comprises a plasma welding module.
8. The continuously advancing dual wire droplet alternation transition control device of claim 7, further comprising a welding power source configured to provide power to the plasma welding module.
9. The continuously fed dual wire droplet alternation transition control device of claim 1, further comprising a blow module configured to protect a weld puddle formed by blow welding.
10. A continuously fed dual wire droplet alternation transition control method, characterized in that it comprises the steps of:
step 1, starting a first wire feeder and a second wire feeder; the first wire feeder sends a first welding wire to the first wire feeding buffer, and the second wire feeder simultaneously sends a second welding wire to the second wire feeding buffer; the first welding wire sequentially passes through the first wire feeding buffer, the first wire feeding pipe and the double-wire locking controller to reach a first wire feeding nozzle; meanwhile, the second welding wire sequentially passes through the second wire feeding buffer, the second wire feeding pipe and the double-wire locking controller to reach a second wire feeding nozzle; the first welding wire extends out of the first wire feeding mouth for a certain length, and the second welding wire extends out of the second wire feeding mouth for a certain length; starting the double-wire locking controller;
step 2, the double-wire locking controller locks the first welding wire entering the first wire feeding nozzle, the first wire feeder continues to feed the welding wire, and the first welding wire is buffered in the first wire feeding buffer; meanwhile, the second wire feeder continues to feed wires, and the second welding wire entering the second wire feeding nozzle is fed into the center of the electric arc to form molten drops which fall into a molten pool; the double-wire locking controller is switched according to set time, the second welding wire entering the second wire feeding nozzle is locked, the second wire feeder continues to feed the wire, and the second welding wire is buffered in the second wire feeding buffer; meanwhile, the first wire feeder continues to feed wires, and the first welding wire entering the first wire feeding nozzle is fed into the center of the electric arc to form molten drops which fall into the molten pool; the double-wire locking controller is switched according to set time;
and 3, repeating the step 2 until the welding process is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010157439.0A CN111390347A (en) | 2020-03-09 | 2020-03-09 | Continuous-feeding double-welding-wire molten drop alternative transition control device and method |
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| CN202010157439.0A CN111390347A (en) | 2020-03-09 | 2020-03-09 | Continuous-feeding double-welding-wire molten drop alternative transition control device and method |
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| CN111390347A true CN111390347A (en) | 2020-07-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112518062A (en) * | 2020-11-04 | 2021-03-19 | 哈尔滨工业大学（威海） | Laser alternate wire filling welding method for regulating and controlling dissimilar joint elements |
| CN112958873A (en) * | 2021-02-20 | 2021-06-15 | 西安交通大学 | Metal sandwich electric arc additive manufacturing device and working method |
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Application publication date: 20200710 |
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