Electric arc printing / welding device for multiple cold wires

Abstract

The utility model relates to the technical field of electric arc welding / printing, in particular to a multi-cold-wire electric arc printing / welding device which comprises a main welding gun, a first wire feeding pipe is arranged in the main welding gun, a second wire feeding pipe is connected with a second wire feeding mechanism in a matched mode, and a welding wire in the first wire feeding pipe is connected with a power source and used for arcing. A plurality of cold wire guns are installed around the outer side of the main welding gun, second wire feeding pipes are arranged in the multiple cold wire guns, and the second wire feeding pipes are connected with second wire feeding mechanisms in a matched mode; and cold wires of the plurality of cold wire guns are conveyed towards the welding wires of the main welding gun. During welding, a welding wire in a main welding gun is used for arcing, a molten pool is formed on a base material, meanwhile, a plurality of cold wire guns convey cold wires to the molten pool, and the cold wires are molten by means of heat of the molten pool, so that on one hand, the welding efficiency can be improved, and on the other hand, redundant heat in all positions of the molten pool can be absorbed by means of the cold wires; and damage to base metal is avoided.

Description

Technical Field

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

[0002] Gas metal arc welding is a welding method that uses the arc generated between the welding wire and the workpiece as a heat source to melt the metal. During the welding process, the molten pool formed by the arc melting the welding wire and the base material and the welding area are protected by inert gas or active gas, which can effectively prevent the harmful effects of the surrounding air.

[0003] Arc fuse 3D printing technology is an additive manufacturing technology that uses the arc generated by metal wire as a heat source to melt the metal wire to achieve metal accumulation. This technology can achieve direct melting and accumulation of metal wire.

[0004] In the arc welding process, the large heat input energy generated by the arc is the thermal power for the continuous melting of the base material at the front end of the welding direction, but it will also cause overheating damage to the heat-affected zone and the base material, especially in the multi-layer and multi-pass welding process of medium and thick plates. The thermal effect of the rear weld on the front weld makes the heat-affected zone more complex and changeable. In this regard, currently, by inserting a cold wire at a reasonable position in the molten pool, not only can the overheating damage to the base material caused by the large heat input energy be reduced, but also the amount of filler metal deposited and the welding speed can be increased. However, most existing arc welding devices only use a single cold wire structure, and the cold wire can only be inserted from the front or rear end of the welding direction. Even if the cold wire enters the molten pool to absorb heat and lower the temperature of the molten pool, it can only cool down one side of the molten pool, resulting in uneven molten pool temperature, affecting the welding effect, and there are limitations to the less overheating damage to the base material. Utility Model Content

[0005] The purpose of the utility model is to provide a multi-cold wire arc printing / welding device to solve the problem in the prior art that most arc welding devices only adopt a single cold wire structure, the cold wire can only be inserted from the front end or the rear end of the welding direction, and only one side of the molten pool can be cooled.

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

[0007] A multi-cold wire arc printing / welding device comprises a main welding gun, wherein a first wire feeding tube is arranged in the main welding gun, the first wire feeding tube is matched with a first wire feeding mechanism, the welding wire in the first wire feeding tube is connected to a power source for arc starting, a plurality of cold wire guns are installed around the outside of the main welding gun, a second wire feeding tube is arranged in each of the cold wire guns, the second wire feeding tube is matched with a second wire feeding mechanism; the cold wires of the plurality of cold wire guns are all transported toward the welding wire of the main welding gun.

[0008] A further technical solution is that the main 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.

[0009] 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.

[0010] 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.

[0011] A further technical solution is that it also includes a mechanical arm, and the main welding gun is installed at the free end of the mechanical arm.

[0012] 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 main welding gun.

[0013] Compared with the prior art, the utility model has at least one of the following beneficial effects: 1. When welding, an arc is struck by the welding wire in the main welding gun to form a molten pool on the base material. At the same time, several cold wire guns convey cold wires toward the molten pool. The cold wires are melted by the heat of the molten pool. On the one hand, the welding efficiency can be improved. On the other hand, multiple cold wires can be used to absorb excess heat at various positions of the molten pool to avoid damage to the base material. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a main welding gun and a cold wire gun of a multiple cold wire arc printing / welding device of the utility model.

[0015] Figure 2 It is an overall schematic diagram of a multi-cold wire arc printing / welding device of the utility model.

[0016] Figure 3 It is a cross-sectional schematic diagram of a connecting rod and a second fixing ring of a multiple cold wire arc printing / welding device of the utility model.

[0017] Icons: 1-main 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. DETAILED DESCRIPTION

[0018] 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.

[0019] Figures 1 to 3 Shown is an embodiment of the utility model.

[0020] Embodiment 1:

[0021] like Figure 1 A multi-cold wire arc printing / welding device is shown, comprising a main welding gun 1, wherein a first wire feeding tube is provided in the main welding gun 1, wherein the first wire feeding tube is matched with a first wire feeding mechanism, wherein the welding wire in the first wire feeding tube is connected to a power source for arc starting, and a plurality of cold wire guns 2 are installed around the outside of the main welding gun 1, wherein a second wire feeding tube is provided in each of the plurality of cold wire guns 2, wherein the second wire feeding tube is matched with a second wire feeding mechanism; the cold wires of the plurality of cold wire guns 2 are all conveyed toward the welding wire of the main welding gun 1. When welding, arc is struck by the welding wire in the main welding gun 1, and a molten pool is formed on the parent material, and at the same time, the plurality of cold wire guns 2 convey the cold wire toward the molten pool, and the cold wire is melted by the heat of the molten pool, which can improve the welding efficiency on the one hand, and absorb the excess heat at each position of the molten pool by the plurality of cold wires on the other hand, thereby avoiding damage to the parent material.

[0022] The main 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, and the middle part of the sub-gun barrel 7 is connected to the main gun barrel 4 through a connecting piece. 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. By 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 to perform welding operations. Generally, the cold wire guns 2 can be set only on the opposite sides of the main welding gun 1. In this way, 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 connecting piece, the middle part of the sub-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 sub-gun nozzle 8 can stably feed wire without violent shaking due to movement. The first wire feeding tube is connected with a conductive nozzle in the main gun nozzle, and the second wire feeding tube is connected with a wire feeding nozzle at the position of the auxiliary gun nozzle.

[0023] 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.

[0024] Embodiment 2:

[0025] Based on the above embodiments, Figure 3 As 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 configuration, when the cold wire gun 2 is mounted on the main 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 configuration can also conveniently separate the auxiliary gun barrel 7 from the main gun barrel 4 when the cold wire gun 2 fails, so as to facilitate maintenance or replacement.

[0026] Embodiment 3:

[0027] Based on the above embodiments, Figure 2 As shown, it also includes a mechanical arm 15, and the main 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 a predetermined route to form a workpiece or a model.

[0028] 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 main 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 main welding gun 1 to perform complex welding and 3D printing.

[0029] 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-wire cold wire arc printing / welding device, comprising a main welding gun (1), wherein a first wire feeding tube is arranged in the main welding gun (1), the first wire feeding tube is matched with a first wire feeding mechanism, the welding wire in the first wire feeding tube is connected to a power source for arc starting, and characterized in that: A plurality of cold wire guns (2) are installed around the outside of the main welding gun (1), a second wire feeding tube is arranged in each of the cold wire guns (2), and the second wire feeding tube is matched with a second wire feeding mechanism; the cold wires of the cold wire guns (2) are all fed toward the welding wire of the main welding gun (1).

2. A multiple cold wire arc printing / welding device according to claim 1, characterized in that: The main 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).

3. A multiple cold wire arc printing / welding device according to claim 2, 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).

4. A multiple cold wire arc printing / welding device according to claim 3, 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).

5. A multiple cold wire arc printing / welding device according to claim 1, characterized in that: It also comprises a mechanical arm (15), wherein the main welding gun (1) is mounted on the free end of the mechanical arm (15).

6. A multiple cold wire arc printing / welding device according to claim 5, 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 main welding gun (1).

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