Laser-assisted double-wire welding gun for preparing alloy material

Abstract

The utility model relates to the technical field of laser welding, and provides a laser-assisted double-wire welding gun for preparing alloy materials, and in the double-wire additive preparation process, two welding wires can respectively extend into a melting cavity from a first wire inlet pipe and a second wire inlet pipe. Due to the fact that the second opening is formed in the fusion pipe and the first opening corresponding to the second opening is formed in the shell, laser can irradiate the interior of the fusion cavity from the first opening and the second opening respectively, and the two kinds of welding wires extending into the fusion cavity are fused. The fused welding wire enters the discharging channel and is discharged from the operation opening to make contact with the bottom plate to be machined, and at the moment, the electric arc is ignited. According to the double-wire welding gun, by designing the double-wire welding gun, the melting cavity, the first opening, the second opening and the discharging channel are utilized, the two welding wires can be effectively fused and act on the bottom plate, the structure is simple, two independent welding gun heads and corresponding wire feeding systems do not need to be arranged, and the additive manufacturing cost is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser welding, and in particular relates to a laser-assisted twin-wire welding gun for preparing alloy materials. Background Art

[0002] Wire arc additive manufacturing (WAAM) uses a welding arc as a heat source to melt metal wire and construct three-dimensional parts layer by layer. Compared with traditional casting, forging, and subtractive manufacturing, WAAM offers high deposition efficiency, high wire utilization, short manufacturing cycles, and low costs. It is suitable for forming large, complex components with high degrees of freedom and for remanufacturing damaged metal parts. By selecting the right WAAM process, efficient, high-precision repairs can be achieved flexibly, economically, and quickly, significantly improving the performance of formed parts.

[0003] The double-wire additive manufacturing process (Double-WAAM) is an arc additive manufacturing (WAAM) technology with a wide range of applications, high production efficiency and low cost. As a type of additive manufacturing technology, arc additive technology uses arc heat to melt the welding wire to prepare the material from bottom to top, and has the characteristics of strong flexibility, high efficiency and strong flexibility. Compared with traditional single-wire additive, double-wire additive can improve the deposition efficiency. In addition, by adjusting the composition and deposition speed of the double welding wire, materials with different composition, structure and performance can be obtained. The double-filler wire cladding method is mainly used for mixed cladding of dissimilar materials. Therefore, double-wire additive technology is suitable for the production of gradient materials with unidirectional performance changes.

[0004] At present, in arc twin-wire additive manufacturing, whether it is twin-wire tungsten electrode additive manufacturing or twin-wire consumable electrode additive manufacturing, two independent welding gun heads are required to be equipped with their own wire feeding systems, which increases the cost of additive manufacturing. Utility Model Content

[0005] Based on the above background, the purpose of the present invention is to provide a laser-assisted twin-wire welding gun for preparing alloy materials, which has a simple structure, low additive manufacturing cost, and can achieve stable fusion of different welding wires.

[0006] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0007] A laser-assisted double-wire welding gun for preparing alloy materials, comprising: a shell having a cavity therein, and an operating port communicating with the cavity is provided at one end of the shell, and a first opening communicating with the cavity is provided on the side of the shell; a fusion tube is provided in the cavity, and the fusion tube has a fusion cavity extending along the length direction of the shell, and a second opening communicating with the fusion cavity is provided on the side of the fusion tube, and the second opening is opposite to the first opening and is used for laser injection; a first wire feed tube and a second wire feed tube are both provided at one end of the shell away from the operating port, and both extend into the fusion cavity; a conductive nozzle is provided in the cavity and connected to one end of the fusion tube, and the conductive nozzle has a discharge channel communicating with the fusion cavity, and one end of the discharge channel is opposite to the operating port.

[0008] Furthermore, the melting chamber includes a wire feeding chamber, a mixing chamber and a discharge chamber which are connected in sequence along the length direction. The first wire feeding tube and the second wire feeding tube both extend into the wire feeding chamber, the mixing chamber is connected to the second opening, and the discharge chamber is connected to the discharge channel.

[0009] Furthermore, the cross-sectional area of ​​the mixing chamber gradually decreases from one end of the mixing chamber close to the wire feeding chamber to one end of the mixing chamber close to the discharge chamber.

[0010] Furthermore, it also includes a dividing piece, which is arranged in the wire feeding cavity and divides the wire feeding cavity into a first part and a second part. The first wire feeding tube extends into the first part, and the second wire feeding tube extends into the second part.

[0011] Furthermore, it also includes an external cooling pipe, a water inlet pipe and a water outlet pipe. The external cooling pipe is sleeved on the outer wall of the fusion pipe facing away from the discharge cavity, and forms a cooling cavity between the external cooling pipe and the outer wall of the fusion pipe. The water inlet pipe and the water outlet pipe are both connected to the cooling cavity.

[0012] Furthermore, the water inlet pipe and the water outlet pipe both extend along the length direction and both extend from an end of the shell away from the operation port.

[0013] Furthermore, it also includes an air inlet pipe, which is communicated with the melting cavity and is used to introduce protective gas.

[0014] Furthermore, one end of the fusion tube extends into the discharge channel and is screwed to the inner wall of the discharge channel.

[0015] Furthermore, the shell includes a pipe sleeve, a connecting cover and a protective nozzle. The pipe sleeve is connected to the protective nozzle through the connecting cover, and the cavity is formed between the pipe sleeve and the protective nozzle. The fusion tube is arranged in the pipe sleeve and extends into the protective nozzle. The conductive nozzle is arranged in the protective nozzle.

[0016] Furthermore, the connecting cover includes a bottom plate and a first surrounding edge and a second surrounding edge respectively provided on both sides of the bottom plate, the first surrounding edge is sleeved on the outside of the pipe sleeve, and the second surrounding edge is sleeved on the inside of the protective nozzle.

[0017] The utility model has the following beneficial effects:

[0018] (1) In the double-wire additive manufacturing process, the two welding wires can be respectively extended from the first wire inlet tube and the second wire inlet tube into the melting chamber. Since the fusion tube is provided with a second opening and the shell is provided with a first opening corresponding to the second opening, the laser can be irradiated into the melting chamber from the first opening and the second opening respectively, and the two inserted welding wires are melted. The fused welding wire enters the discharge channel and is discharged from the operating port to contact the base plate to be processed, at which time the arc is ignited. The present application designs a double-wire welding gun, utilizes the melting chamber, the first opening, the second opening and the discharge channel, so that the two welding wires can be effectively fused and act on the base plate. Its structure is simple, and there is no need to be equipped with two independent welding gun heads and their corresponding wire feeding systems, which makes the additive manufacturing cost low.

[0019] (2) The melting chamber is designed to be divided into a wire feeding chamber, a mixing chamber and a discharge chamber along the length direction, so that the two welding wires enter the mixing chamber through the wire feeding chamber respectively and are laser-fused in the mixing chamber to achieve effective fusion of the materials; at the same time, the discharge chamber is used to stably feed the fused welding wire into the discharge channel to ensure stable additive manufacturing.

[0020] (3) An external cooling pipe is installed on the outer wall of the discharge chamber, and cooling water is introduced into the cooling chamber through the water inlet pipe to cool the discharge chamber and ensure that the surface temperature of the fusion tube is kept at an appropriate temperature, which is beneficial to extend the life of the double-wire welding gun.

[0021] (4) An air inlet pipe is connected to the fusion tube, and the protective gas is introduced into the fusion cavity through the air inlet pipe to ensure stable welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 Schematic diagram of the structure of a twin-wire welding gun shown in one embodiment;

[0024] Figure 2 A cross-sectional view of a twin-wire welding gun according to an embodiment of the present invention;

[0025] Figure 3 A cross-sectional view of a twin-wire welding gun at a first opening shown in one embodiment;

[0026] Figure 4 FIG. 1 is a cross-sectional view of a twin-wire welding gun at a connection cover shown in one embodiment.

[0027] Description of Figure Numbers:

[0028] 100, twin-wire welding gun; 10, shell; 11, cavity; 12, operating port; 13, first opening; 14, pipe sleeve; 15, connecting cover; 151, first surrounding edge; 152, bottom plate; 153, second surrounding edge; 16, protective nozzle; 20, fusion tube; 21, melting chamber; 211, wire feeding chamber; 212, mixing chamber; 213, discharge chamber; 22, second opening; 23, dividing piece; 30, conductive nozzle; 31, discharge channel; 40, first wire inlet tube; 41, second wire inlet tube; 50, water inlet pipe; 51, water outlet pipe; 52, air inlet pipe; 60, external cooling tube; 61, cooling chamber; L, length direction; 200, laser

[0029] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, in this utility model, the descriptions of "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0033] In one embodiment, please refer to Figures 1 to 4 The present application provides a laser-assisted twin-wire welding gun 100 for preparing alloy materials, comprising: a shell 10 having a cavity 11 therein, and an operating port 12 communicating with the cavity 11 is provided at one end of the shell 10, and a first opening 13 communicating with the cavity 11 is provided on the side of the shell 10; a fusion tube 20 is provided in the cavity 11, and the fusion tube 20 has a melting cavity 21 extending along the length direction L of the shell 10, and a second opening 22 communicating with the melting cavity 21 is provided on the side of the fusion tube 20, and the second opening 22 is opposite to the first opening 13 and is used for allowing the laser 200 to enter; a first wire inlet tube 40 and a second wire inlet tube 41 are both provided at one end of the shell 10 away from the operating port 12, and both extend into the melting cavity 21; a conductive nozzle 30 is provided in the cavity 11 and connected to one end of the fusion tube 20, and the conductive nozzle 30 has a discharge channel 31 communicating with the melting cavity 21, and one end of the discharge channel 31 is opposite to the operating port 12.

[0034] The above-mentioned twin-wire welding gun 100 can extend the two welding wires from the first wire inlet tube 40 and the second wire inlet tube 41 into the melting chamber 21 during the twin-wire additive manufacturing process. Since the fusion tube 20 is provided with a second opening 22 and the shell 10 is provided with a first opening 13 corresponding to the second opening 22, the laser 200 can be irradiated into the melting chamber 21 from the first opening 13 and the second opening 22 respectively, and the two inserted welding wires are melted. The fused welding wire enters the discharge channel 31 and is discharged from the operating port 12 to contact the base plate 152 to be processed, at which time the arc is ignited. The present application designs a twin-wire welding gun 100, utilizing the melting chamber 21, the first opening 13, the second opening 22 and the discharge channel 31, so that the two welding wires can be effectively fused and act on the base plate 152. Its structure is simple, and there is no need to be equipped with two independent welding gun heads and their corresponding wire feeding systems, which makes the additive manufacturing cost low.

[0035] It should be explained that there are many ways to connect the conductive nozzle 30 and the fusion tube 20. It is only necessary to achieve communication between the melting cavity 21 of the fusion tube 20 and the discharge channel 31 of the conductive nozzle 30. For example, one end of the fusion tube 20 can be inserted into the discharge channel 31 and screwed or clamped to the inner wall of the discharge channel 31; or, one end of the conductive nozzle 30 can be inserted into the melting cavity 21 and screwed to the cavity wall of the melting cavity 21.

[0036] It should also be explained that the connection preparation structure of this embodiment is applicable to the fusion of various welding wires, such as copper-aluminum alloy, aluminum-magnesium alloy, iron-aluminum alloy, etc.

[0037] For further information, please refer to Figure 2 The melting chamber 21 includes a wire feeding chamber 211, a mixing chamber 212, and a discharge chamber 213 that are sequentially connected along the length direction L. The first wire inlet tube 40 and the second wire inlet tube 41 both extend into the wire feeding chamber 211, the mixing chamber 212 is connected to the second opening 22, and the discharge chamber 213 is connected to the discharge channel 31. It can be seen that the melting chamber 21 is designed as a wire feeding chamber 211, a mixing chamber 212, and a discharge chamber 213 along the length direction L, so that the two welding wires pass through the wire feeding chamber 211 and enter the mixing chamber 212 respectively, and are fused by the laser 200 in the mixing chamber 212, thereby achieving effective fusion of the materials; at the same time, the discharge chamber 213 is used to stably feed the fused welding wire into the discharge channel 31, ensuring stable additive manufacturing.

[0038] For further information, please refer to Figure 2 The cross-sectional area of ​​the mixing chamber 212 gradually decreases from the end of the mixing chamber 212 close to the wire feeding chamber 211 to the end of the mixing chamber 212 close to the discharge chamber 213. Therefore, the cross-sectional area of ​​the mixing chamber 212 decreases as it approaches the discharge chamber 213, showing a tendency to converge, ensuring that the fused welding wire can stably enter the discharge chamber 213.

[0039] In one embodiment, please refer to Figure 2 , further comprising a dividing member 23 disposed within the wire feeding chamber 211 and dividing it into a first portion and a second portion. The first wire inlet tube 40 extends into the first portion, and the second wire inlet tube 41 extends into the second portion. As can be seen, the use of the dividing member 23 to divide the wire feeding chamber 211 into two spaces facilitates the stable entry of the two welding wires into the mixing chamber 212.

[0040] The split piece 23 can be fixed in the wire feeding cavity 211 by welding, clamping, bolting, etc. Of course, in another embodiment, the split piece 23 can be designed as an integrated structure with the fusion tube 20.

[0041] In one embodiment, please refer to Figure 2, further comprising an external cooling pipe 60, a water inlet pipe 50, and a water outlet pipe 51. The external cooling pipe 60 is sheathed on the outer wall of the fusion tube 20 facing away from the discharge chamber 213, and forms a cooling chamber 61 between the external cooling pipe 60 and the outer wall of the fusion tube 20. The water inlet pipe 50 and the water outlet pipe 51 are both in communication with the cooling chamber 61. It can be seen that the external cooling pipe 60 is sheathed on the outer wall of the discharge chamber 213, and cooling water is passed into the cooling chamber 61 through the water inlet pipe 50, thereby cooling the discharge chamber 213 and ensuring that the surface temperature of the fusion tube 20 is maintained at an appropriate temperature, which is beneficial to extending the service life of the twin-wire welding gun 100.

[0042] Furthermore, the water inlet pipe 50 and the water outlet pipe 51 both extend along the length direction L and extend from the end of the housing 10 away from the operation port 12. Thus, the water inlet pipe 50 and the water outlet pipe 51 are respectively led out from the end of the housing 10 away from the operation port 12, making it easier to flow cooling water into the water inlet pipe 50 and to recover cooling water from the water outlet pipe 51.

[0043] In one embodiment, please refer to Figure 3 and Figure 4 , further comprising an air inlet pipe 52, which is in communication with the melting chamber 21 for introducing shielding gas. It can be seen that the fusion tube 20 is connected to the air inlet pipe 52, which is used to introduce shielding gas into the melting chamber 21 to ensure stable welding.

[0044] In one embodiment, one end of the fusion tube 20 extends into the discharge channel 31 and is screwed to the inner wall of the discharge channel 31. In this way, the fusion tube 20 and the conductive nozzle 30 are tightly connected, which is conducive to improving the stability of the structure.

[0045] It should be explained that one end of the fusion tube 20 extends into the discharge channel 31 and is screwed, which means that the outer wall of the fusion tube 20 is provided with an external thread, and the inner wall of the discharge channel 31 is provided with an internal thread matching it.

[0046] In one embodiment, the shell 10 includes a sleeve 14, a connecting cover 15 and a protective nozzle 16. The sleeve 14 is connected to the protective nozzle 16 through the connecting cover 15, and a cavity 11 is formed between the sleeve 14 and the protective nozzle 16. The fusion tube 20 is disposed in the sleeve 14 and extends into the protective nozzle 16. The conductive nozzle 30 is disposed in the protective nozzle 16.

[0047] For further information, please refer to Figure 2 The connecting cover 15 includes a bottom plate 152 and a first surrounding edge 151 and a second surrounding edge 153 respectively provided on both sides of the bottom plate 152 . The first surrounding edge 151 is sleeved on the outside of the pipe sleeve 14 , and the second surrounding edge 153 is sleeved on the inside of the protective nozzle 16 .

[0048] As can be seen, the first and second sidewalls 151, 153 create a tight connection between the sleeve 14, the connection cap 15, and the protective nozzle 16, further enhancing structural stability. The fusion tube 20 is positioned within the sleeve 14, extending through the base plate 152 and into the protective nozzle 16. To achieve a stable threaded connection, the sleeve 14 can be provided with external threads, the first sidewall 151 with internal threads, the second sidewall 153 with external threads, and the protective nozzle 16 with internal threads.

[0049] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A laser-assisted twin-wire welding gun for preparing alloy materials, characterized in that: include: A shell (10) has a cavity (11) therein, and an operating port (12) communicating with the cavity (11) is provided at one end of the shell (10), and a first opening (13) communicating with the cavity (11) is provided on a side surface of the shell (10); A fusion tube (20) is provided in the cavity (11), wherein the fusion tube (20) has a fusion cavity (21) extending along the length direction (L) of the shell (10), and a second opening (22) communicating with the fusion cavity (21) is provided on a side surface of the fusion tube (20), and the second opening (22) is opposite to the first opening (13) and is used for laser (200) to enter; The first wire inlet pipe (40) and the second wire inlet pipe (41) are both arranged at one end of the housing (10) away from the operating port (12), and both extend into the melting cavity (21); A conductive nozzle (30) is disposed in the cavity (11) and connected to one end of the fusion tube (20). The conductive nozzle (30) has a discharge channel (31) in communication with the fusion cavity (21), and one end of the discharge channel (31) is opposite to the operation port (12).

2. The laser-assisted twin-wire welding gun for preparing alloy materials according to claim 1, characterized in that: The melting chamber (21) includes a wire feeding chamber (211), a mixing chamber (212) and a discharge chamber (213) which are sequentially connected along the length direction (L); the first wire feeding tube (40) and the second wire feeding tube (41) both extend into the wire feeding chamber (211); the mixing chamber (212) is connected to the second opening (22); and the discharge chamber (213) is connected to the discharge channel (31).

3. The laser-assisted twin-wire welding gun for preparing alloy materials according to claim 2, characterized in that: The cross-sectional area of ​​the mixing chamber (212) gradually decreases from one end of the mixing chamber (212) close to the wire feeding chamber (211) to one end of the mixing chamber (212) close to the discharge chamber (213).

4. The laser-assisted twin-wire welding gun for preparing alloy materials according to claim 2, characterized in that: It also includes a dividing piece (23), which is arranged in the wire feeding cavity (211) and divides it into a first part and a second part, the first wire feeding tube (40) extends into the first part, and the second wire feeding tube (41) extends into the second part.

5. The laser-assisted twin-wire welding gun for preparing alloy materials according to claim 2, characterized in that: It also includes an external cooling pipe (60), a water inlet pipe (50) and a water outlet pipe (51). The external cooling pipe (60) is sleeved on the outer wall of the fusion pipe (20) facing away from the discharge cavity (213), and forms a cooling cavity (61) between the external cooling pipe and the outer wall of the fusion pipe (20). The water inlet pipe (50) and the water outlet pipe (51) are both connected to the cooling cavity (61).

6. The laser-assisted twin-wire welding gun for preparing alloy materials according to claim 5, characterized in that: The water inlet pipe (50) and the water outlet pipe (51) both extend along the length direction (L) and both extend from one end of the housing (10) away from the operating port (12).

7. The laser-assisted twin-wire welding gun for preparing alloy materials according to claim 1, characterized in that: It also includes an air inlet pipe (52), which is in communication with the melting cavity (21) and is used for introducing protective gas.

8. A laser-assisted twin-wire welding gun for preparing alloy materials according to any one of claims 1 to 7, characterized in that: One end of the fusion tube (20) extends into the discharge channel (31) and is screwed to the inner wall of the discharge channel (31).

9. A laser-assisted twin-wire welding gun for preparing alloy materials according to any one of claims 1 to 7, characterized in that: The shell (10) includes a pipe sleeve (14), a connecting cover (15) and a protective nozzle (16); the pipe sleeve (14) is connected to the protective nozzle (16) through the connecting cover (15); and the cavity (11) is formed between the pipe sleeve (14) and the protective nozzle (16); the fusion tube (20) is arranged in the pipe sleeve (14) and extends into the protective nozzle (16); and the conductive nozzle (30) is arranged in the protective nozzle (16).

10. The laser-assisted twin-wire welding gun for preparing alloy materials according to claim 9, characterized in that: The connecting cover (15) comprises a bottom plate (152) and a first surrounding edge (151) and a second surrounding edge (153) respectively arranged on both sides of the bottom plate (152); the first surrounding edge (151) is sleeved on the outside of the pipe sleeve (14); and the second surrounding edge (153) is sleeved on the inside of the protective nozzle (16).

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