Multi-wire laser printing / welding device

Abstract

The utility model relates to the technical field of laser welding / printing, in particular to a multi-wire laser printing / welding device. Comprising a laser welding gun, an air suction nozzle is installed at the position of a main gun nozzle of the laser welding gun and connected with an air suction pump through an air suction pipe, and a filtering assembly is installed on the air suction pipe; a cold wire gun is installed on the outer side of the laser welding gun, a wire feeding pipe is arranged in the cold wire gun, the wire feeding pipe is connected with a matched wire feeding mechanism through a wire feeding hose, and the cold wire gun conveys cold wires towards a main gun nozzle of the laser welding gun. In the welding process, smoke generated around the laser welding gun can be absorbed by means of the air suction nozzle by starting the air suction pump, and the situation that the smoke drifts away at will and pollutes the surrounding environment or operators is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding / printing, in particular to a multi-wire laser printing / welding device. Background Art

[0002] Laser welding / printing is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. Laser welding is one of the important aspects of the application of laser material processing technology. In the 1970s, it was mainly used for welding thin-walled materials and low-speed welding. The welding process is a heat conduction type, that is, the laser radiation heats the surface of the workpiece, and the surface heat diffuses to the inside through heat conduction. By controlling the width, energy, peak power and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool. Due to its unique advantages, it has been successfully applied to the precision welding of micro and small parts.

[0003] When performing laser welding, you can weld two workpieces together by only using laser to melt the workpiece without adding additive materials, or you can add additive materials and use the wire feeding mechanism to feed cold wire into the molten pool to fill the gaps between welds and improve welding quality. When performing laser 3D printing, you need to continuously feed cold wire into the molten pool. The cold wire melts and continuously stacks behind the molten pool to form the required workpiece or model.

[0004] However, current laser welding machines will produce harmful gases after melting due to the material of the base material or the wire itself. The direct emission of these harmful gases will not only pollute the environment and the air, but also endanger the health of operators if they inhale these harmful gases during operation, and may also cause various serious diseases. Utility Model Content

[0005] The utility model aims to provide a multi-filament laser printing / welding device to solve the problem in the prior art that harmful gases generated during the laser welding / printing process may cause harm to operators.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A multi-wire laser printing / welding device comprises a laser welding gun, wherein an exhaust nozzle is installed at the main gun nozzle position of the laser welding gun, the exhaust nozzle is connected to an exhaust pump through an exhaust pipe, and a filter assembly is installed on the exhaust pipe; a cold wire gun is installed on the outer side of the laser welding gun, a wire feeding tube is arranged inside the cold wire gun, the wire feeding tube is connected to a matching wire feeding mechanism through a wire feeding hose, and the cold wire gun delivers cold wire toward the main gun nozzle of the laser welding gun.

[0008] A further technical solution is that a plurality of cold wire guns are arranged around the laser welding gun.

[0009] A further technical solution is that the exhaust nozzle is in a circular shape, and is sleeved on the outer wall of the main nozzle of the laser welding gun. An exhaust cavity is provided in the exhaust nozzle, and a plurality of air inlet holes connected to the exhaust cavity are provided on the side of the exhaust nozzle facing the main nozzle of the laser welding gun, and the exhaust pipe is connected to the exhaust cavity.

[0010] A further technical solution is that the laser welding gun includes a main gun body, a main gun barrel and a main gun nozzle which are connected in sequence, and the cold wire gun includes a sub-gun body, a sub-gun barrel and a sub-gun nozzle which are connected in sequence, the sub-gun body is fixed to the side of the main gun body, the middle part of the sub-gun barrel is connected to the main gun barrel through a connecting piece, and the lower end of the sub-gun barrel is bent toward the main gun nozzle so that the sub-gun nozzle is facing and close to the main gun nozzle.

[0011] A further technical solution is that the connecting piece includes a first fixing ring, a connecting rod and a second fixing ring, the first fixing ring is sleeved on the outer wall of the main barrel, the second fixing ring is sleeved on the outer wall of the auxiliary barrel, one end of the connecting rod is connected to the outer wall of the first fixing ring, and the other end is connected to the outer wall of the second fixing ring.

[0012] A further technical solution is that an insertion hole is recessed in the outer wall of the second fixing ring, and an insertion piece matching the insertion hole is provided at one end of the connecting rod away from the first fixing ring. After the insertion piece is inserted into the insertion hole, it is fixed in the insertion hole by screws.

[0013] A further technical solution is that it also includes a mechanical arm, and the laser welding gun is installed at the free end of the mechanical arm.

[0014] A further technical solution is that the robotic arm includes a rotating base, a first large arm, a second large arm and a rotating arm, the side surface of one end of the first large arm is connected to the rotating base through a first servo motor, the side surface of the other end is rotationally connected to the side surface of one end of the second large arm through a second servo motor, the side surface of the other end of the second large arm is rotationally connected to the side surface of one end of the rotating arm through a third servo motor, the other end of the rotating arm is coaxially connected to a fourth servo motor, a connecting section is sleeved on the output shaft of the fourth servo motor, and the connecting section is connected to the side surface of the laser welding gun.

[0015] Compared with the prior art, the utility model has at least one of the following beneficial effects: 1. During the welding process, by starting the vacuum pump, the smoke generated around the laser welding gun can be absorbed with the help of the vacuum nozzle to prevent the smoke from drifting around and causing pollution to the surrounding environment or operators; 2. By setting up a filter component, the main harmful components in the smoke can be absorbed, so that the gas discharged by the vacuum pump will not pollute the air; 3. By setting up a cold wire gun, additives can be provided during welding or printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1The utility model is a schematic diagram of a laser welding gun and a cold wire gun of a multi-wire laser printing / welding device.

[0017] Figure 2 The utility model is a schematic diagram of the whole of a multi-wire laser printing / welding device.

[0018] Figure 3 This is a cross-sectional schematic diagram of an exhaust nozzle of a multi-wire laser printing / welding device of the utility model.

[0019] Figure 4 It is a cross-sectional schematic diagram of a connecting rod and a second fixing ring of a multi-wire laser printing / welding device of the utility model.

[0020] Icons: 1-laser welding gun, 2-cold wire gun, 3-main gun body, 4-main gun barrel, 5-main gun nozzle, 6-auxiliary gun body, 7-auxiliary gun barrel, 8-auxiliary gun nozzle, 9-first fixing ring, 10-connecting rod, 11-second fixing ring, 12-insertion hole, 13-insertion plate, 14-screw, 15-mechanical arm, 16-rotating base, 17-first large arm, 18-second large arm, 19-rotating arm, 20-first servo motor, 21-second servo motor, 22-third servo motor, 23-fourth servo motor, 24-connecting section, 25-exhaust nozzle, 26-exhaust pipe, 27-filter assembly, 28-exhaust cavity, 29-air inlet. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] Figures 1 to 3 Shown is an embodiment of the utility model.

[0023] Embodiment 1:

[0024] like Figure 1A multi-wire laser printing / welding device is shown, comprising a laser welding gun 1, wherein a suction nozzle 25 is installed at the main gun nozzle 5 of the laser welding gun 1, the suction nozzle 25 is connected to a suction pump through a suction pipe 26, and a filter assembly 27 is installed on the suction pipe 26; a cold wire gun 2 is installed on the outside of the laser welding gun 1, a wire feeding tube is arranged inside the cold wire gun 2, and the wire feeding tube is connected to a matching wire feeding mechanism through a wire feeding hose, and the cold wire gun 2 delivers cold wire toward the main gun nozzle of the laser welding gun 1. During the welding process, by starting the suction pump, the smoke generated around the laser welding gun 1 can be absorbed by the suction nozzle 25 to prevent the smoke from arbitrarily dispersing and causing pollution to the surrounding environment or operators. By setting the filter assembly 27, the main harmful components in the smoke can be absorbed, so that the gas discharged by the suction pump will not pollute the air. By setting the cold wire gun 2, additives can be provided during welding or printing. In addition to using a matching wire feeding mechanism to transport cold wire, the cold wire gun 2 can also use a powder conveying mechanism to convey additive powder matching the base material through the cold wire gun 2 toward the main cavity nozzle of the laser welding gun 1. After the powder is ejected from the cold wire gun, it contacts the molten pool or directly contacts the high-energy laser beam to melt to complete welding or 3D printing.

[0025] Several cold wire guns 2 are arranged around the laser welding gun 1. Through the cooperation of multiple cold wire guns 2, cold wires can be delivered to multiple positions of the molten pool formed by the laser welding gun 1, which can improve the efficiency of providing additives and quickly absorb the molten pool temperature to avoid damage to the parent material caused by excessively high molten pool temperature.

[0026] Embodiment 2:

[0027] Based on the above embodiments, Figure 3 As shown, the exhaust nozzle 25 is in an annular shape, and is sleeved on the outer wall of the main gun nozzle 5 of the laser welding gun 1. An exhaust cavity 28 is provided in the exhaust nozzle 25. A plurality of air inlet holes 29 connected to the exhaust cavity 28 are provided on the side of the exhaust nozzle 25 facing the main gun nozzle 5 of the laser welding gun 1, and the exhaust pipe 26 is connected to the exhaust cavity 28. By setting the exhaust nozzle 25 in an annular shape, it can fit with the outer wall of the main gun nozzle 5, and with the help of the plurality of air inlet holes 29 on the exhaust nozzle 25, the gas floating out from around the main gun nozzle 5 can be absorbed.

[0028] Embodiment 3:

[0029] like Figure 1As shown, on the basis of the above-mentioned embodiment, the laser welding gun 1 includes a main gun body 3, a main gun barrel 4 and a main gun nozzle 5 connected in sequence, and the cold wire gun 2 includes a sub-gun body 6, a sub-gun barrel 7 and a sub-gun nozzle 8 connected in sequence, the sub-gun body 6 is fixed to the side of the main gun body 3, the middle part of the sub-gun barrel 7 is connected to the main gun barrel 4 through a connecting piece, and the lower end of the sub-gun barrel 7 is bent toward the main gun nozzle 5, so that the sub-gun nozzle 8 is toward and close to the main gun nozzle 5. Taking advantage of the length of the main gun barrel 4 and the sub-gun barrel 7, when welding, it is possible to extend into some relatively narrow positions for welding operations. Generally, the cold wire guns 2 can be set only on the opposite sides of the laser welding gun 1, so that when the gun is moving, the two cold wire guns 2 are placed on the front and rear sides of the gun moving route, which can adapt to more types of gaps and can absorb heat well for the molten pool. By setting a connector, the middle part of the auxiliary gun barrel 7 and the middle part of the main gun barrel 4 can be connected together, which can improve the stability of the entire device. When in use, the auxiliary gun nozzle 8 can stably feed the wire without violent shaking due to movement. The first wire feeding tube is connected to a conductive nozzle in the main gun nozzle. The wire feeding tube is connected to a wire feeding nozzle at the position of the auxiliary gun nozzle. The main gun body 3 is provided with components for generating a high-energy laser beam, and any one of the conventional laser welding guns in the prior art can be used. The generated laser beam passes through the main gun barrel 4 and is emitted from the main gun nozzle 5.

[0030] The connecting member includes a first fixing ring 9, a connecting rod 10 and a second fixing ring 11. The first fixing ring 9 is sleeved on the outer wall of the main gun barrel 4, and the second fixing ring 11 is sleeved on the outer wall of the auxiliary gun barrel 7. One end of the connecting rod 10 is connected to the outer wall of the first fixing ring 9, and the other end is connected to the outer wall of the second fixing ring 11. In this arrangement, the second fixing ring 11 is installed on each auxiliary gun barrel 7, and all the second fixing rings 11 are fixed together by the connecting rod 10 and the first fixing ring 9, thereby fixing all the auxiliary gun barrels 7, so that the auxiliary gun barrels 7 will not shake when in use.

[0031] Embodiment 4:

[0032] Based on the above embodiments, Figure 4As shown, the outer wall of the second fixing ring 11 is recessed with an insertion hole 12, and the end of the connecting rod 10 away from the first fixing ring 9 is provided with an insertion piece 13 matching the insertion hole 12. After the insertion piece 13 is inserted into the insertion hole 12, it is fixed in the insertion hole 12 by a screw 14. With such a setting, when the cold wire gun 2 is installed on the laser welding gun 1, the auxiliary gun body 6 is fixed to the side of the main gun body 3, and the insertion piece 13 is inserted into the insertion hole 12. A threaded hole connected to the insertion hole 12 is provided on the end face of the second fixing ring 11. By screwing the screw 14 from the threaded hole into the insertion hole 12 and the insertion piece 13 touching or embedding in the insertion piece 13, the insertion piece 13 can be stably fixed in the insertion hole 12. Such a setting can also conveniently separate the auxiliary gun barrel 7 from the main gun barrel 4 when the cold wire gun 2 fails, which is convenient for maintenance or replacement.

[0033] Embodiment 5:

[0034] Based on the above embodiments, Figure 2 As shown, it also includes a mechanical arm 15, and the laser welding gun 1 is installed at the free end of the mechanical arm 15. By setting the mechanical arm 15, the operation of the entire device can be made more intelligent, and automatic welding can be performed through the built-in program control of the mechanical arm 15. In addition, 3D printing can also be performed with the help of the mechanical arm 15, and the welding wire and the cold wire are melted and stacked continuously according to the established route to form a workpiece or a model.

[0035] The mechanical arm 15 includes a rotating base 16, a first large arm 17, a second large arm 18 and a rotating arm 19. The side of one end of the first large arm 17 is connected to the rotating base 16 through a first servo motor 20, and the side of the other end is connected to the side of one end of the second large arm 18 through a second servo motor 21. The side of the other end of the second large arm 18 is connected to the side of one end of the rotating arm 19 through a third servo motor 22. The other end of the rotating arm 19 is coaxially connected to a fourth servo motor 23. The output shaft of the fourth servo motor 23 is sleeved with a connecting section 24, and the connecting section 24 is connected to the side of the laser welding gun 1. The cooperation of the rotating base 16, the first large arm 17, the second large arm 18 and the rotating arm 19 can drive the laser welding gun 1 to perform complex welding and 3D printing.

[0036] Although the utility model is described herein with reference to a plurality of illustrative embodiments of the utility model, it should be understood that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the disclosure, drawings, and claims of the present application, various modifications and improvements may be made to the components and / or layout of the subject combination layout. In addition to the modifications and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A multi-filament laser printing / welding device, comprising a laser welding gun (1), characterized in that: An exhaust nozzle (25) is installed at the main gun nozzle (5) of the laser welding gun (1), and the exhaust nozzle (25) is connected to an exhaust pump via an exhaust pipe (26), and a filter assembly (27) is installed on the exhaust pipe (26); a cold wire gun (2) is installed on the outside of the laser welding gun (1), and a wire feeding tube is arranged inside the cold wire gun (2), and the wire feeding tube is connected to a matching wire feeding mechanism via a wire feeding hose, and the cold wire gun (2) feeds cold wire toward the main gun nozzle of the laser welding gun (1).

2. A multi-filament laser printing / welding device according to claim 1, characterized in that: A plurality of the cold wire guns (2) are arranged around the laser welding gun (1).

3. A multi-filament laser printing / welding device according to claim 1, characterized in that: The exhaust nozzle (25) is annular and is sleeved on the outer wall of the main gun nozzle (5) of the laser welding gun (1). An exhaust cavity (28) is provided in the exhaust nozzle (25). A plurality of air inlet holes (29) connected to the exhaust cavity (28) are provided on the side of the exhaust nozzle (25) facing the main gun nozzle (5) of the laser welding gun (1). The exhaust pipe (26) is connected to the exhaust cavity (28).

4. A multi-filament laser printing / welding device according to claim 1, characterized in that: The laser welding gun (1) comprises a main gun body (3), a main gun barrel (4) and a main gun nozzle (5) which are connected in sequence, and the cold wire gun (2) comprises a sub-gun body (6), a sub-gun barrel (7) and a sub-gun nozzle (8) which are connected in sequence, wherein the sub-gun body (6) is fixed to the side of the main gun body (3), the middle part of the sub-gun barrel (7) is connected to the main gun barrel (4) via a connecting piece, and the lower end of the sub-gun barrel (7) is bent toward the main gun nozzle (5) so that the sub-gun nozzle (8) faces and is close to the main gun nozzle (5).

5. A multi-filament laser printing / welding device according to claim 4, characterized in that: The connecting member comprises a first fixing ring (9), a connecting rod (10) and a second fixing ring (11); the first fixing ring (9) is sleeved on the outer wall of the main gun barrel (4); the second fixing ring (11) is sleeved on the outer wall of the auxiliary gun barrel (7); one end of the connecting rod (10) is connected to the outer wall of the first fixing ring (9), and the other end is connected to the outer wall of the second fixing ring (11).

6. A multi-filament laser printing / welding device according to claim 5, characterized in that: The outer wall of the second fixing ring (11) is recessed to form an insertion hole (12); an end of the connecting rod (10) away from the first fixing ring (9) is provided with an insertion piece (13) matching the insertion hole (12); after the insertion piece (13) is inserted into the insertion hole (12), it is fixed in the insertion hole (12) by means of a screw (14).

7. A multi-filament laser printing / welding device according to claim 1, characterized in that: It also comprises a mechanical arm (15), wherein the laser welding gun (1) is mounted on the free end of the mechanical arm (15).

8. A multi-filament laser printing / welding device according to claim 7, characterized in that: The mechanical arm (15) comprises a rotating base (16), a first large arm (17), a second large arm (18) and a rotating arm (19); the side surface of one end of the first large arm (17) is connected to the rotating base (16) via a first servo motor (20); the side surface of the other end is rotationally connected to the side surface of one end of the second large arm (18) via a second servo motor (21); the side surface of the other end of the second large arm (18) is rotationally connected to the side surface of one end of the rotating arm (19) via a third servo motor (22); the other end of the rotating arm (19) is coaxially connected to a fourth servo motor (23); a connecting section (24) is sleeved on the output shaft of the fourth servo motor (23); the connecting section (24) is connected to the side surface of the laser welding gun (1).

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