Traceless welding device

Abstract

The utility model belongs to the technical field of welding devices, and particularly relates to a traceless welding device which comprises a power source, a silicon bronze welding wire, a welding head and a nozzle. A first electrode of the power supply is electrically connected with the silicon bronze welding wire; a second electrode of the power supply is electrically connected with a to-be-welded part; the free end of the silicon bronze welding wire penetrates through the welding head and is conveyed to the to-be-welded part of the to-be-welded part, and the nozzle is used for spraying protective gas to the to-be-welded part while the to-be-welded part is welded by the silicon bronze welding wire. The melting point of the silicon bronze welding wire is low, the to-be-welded part cannot be melted basically, the to-be-welded part cannot deform in the welding process, the welding quality of the to-be-welded part is guaranteed, and the attractiveness and manufacturing efficiency of the to-be-welded part are improved. And the protective gas sprayed out of the nozzle can prevent oxygen from entering the to-be-welded part and combusting the to-be-welded part, a relatively closed space is formed in the to-be-welded part, and the welding quality of the to-be-welded part is further guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding devices, and particularly relates to a seamless welding device. Background Art

[0002] In the vehicle manufacturing industry, the welding process can fixedly connect the inner sheet metal and the outer sheet metal of a vehicle together. To ensure the aesthetics and aerodynamic performance of the vehicle, there are many curved surfaces and streamlined structures on the vehicle. During the automobile manufacturing process, when the welding points are designed on the curved surfaces, the existing welding methods often produce obvious indentations and distortions at the welding positions; to ensure the aesthetics of the vehicle, it is usually necessary to process the welding points of the vehicle, that is, to grind and shape the welding positions on the curved surfaces. This way of processing the welding points on the curved surfaces not only increases the manufacturing cost but also reduces the manufacturing efficiency. Summary of the Utility Model

[0003] Aiming at the technical problems in the prior art that the welding points on the curved surfaces of vehicles need to be ground and shaped, etc., the utility model provides a seamless welding device.

[0004] To solve the above problems, the first embodiment of the utility model provides a seamless welding device, which includes a power source, a silicon bronze welding wire, a welding head, and a nozzle; the first electrode of the power source is electrically connected to the silicon bronze welding wire, and the second electrode of the power source is electrically connected to the workpiece to be welded; the free end of the silicon bronze welding wire passes through the welding head and is conveyed to the welding position of the workpiece to be welded. While the silicon bronze welding wire welds the welding position, the nozzle is used to spray a shielding gas to the welding position.

[0005] Optionally, the seamless welding device further includes a roller; one end of the silicon bronze welding wire far from the free end is wound around the roller.

[0006] Optionally, the seamless welding device further includes a wire feeding mechanism provided with a conveying space, and the free end of the silicon bronze welding wire passes through the conveying space and is inserted into the welding head.

[0007] Optionally, the wire feeding mechanism includes a driving member, and a first roller body and a second roller body arranged at intervals; the conveying space is arranged between the first roller body and the second roller body; the driving member is connected to the first roller body and / or the second roller body and is used to drive the first roller body and / or the second roller body to rotate.

[0008] Optionally, the welding head is provided with a through hole, and the free end of the silicon bronze welding wire is sequentially conveyed to the welding position after passing through the conveying space and the through hole.

[0009] Optionally, the seam - less welding device further includes an air pump communicating with the nozzle, and the air pump is configured to drive a shielding gas to be ejected through the nozzle towards the part to be welded.

[0010] Optionally, the nozzle is provided with spray holes for ejecting the shielding gas, and the welding head is installed in the spray holes.

[0011] Optionally, the nozzle and the welding head are integrally formed.

[0012] Optionally, the part to be welded includes an inner vehicle sheet metal and an outer vehicle sheet metal. The part to be welded on the inner vehicle sheet metal is provided with plug - weld holes, and the silicon bronze welding wire is used to weld the edges of the plug - weld holes to the outer vehicle sheet metal.

[0013] Optionally, the seam - less welding device further includes a welding housing having an internal space. The power supply is installed in the internal space, and both the welding head and the nozzle are installed on the welding housing.

[0014] In the present utility model, the first electrode of the power supply is electrically connected to the silicon bronze welding wire, and the second electrode of the power supply is electrically connected to the part to be welded. The free end of the silicon bronze welding wire passes through the welding head and is delivered to the part to be welded. During the process of welding the part to be welded, since the melting point of the silicon bronze welding wire is relatively low, the part to be welded basically does not melt, so that accidents of deformation of the part to be welded will not occur during the welding process. It is particularly suitable for welding the curved surface parts of the part to be welded, and ensures the welding quality of the part to be welded, improving the aesthetics and manufacturing efficiency of the part to be welded. In addition, during the process of welding the part to be welded with the silicon bronze welding wire, the nozzle is used to eject the shielding gas through the spray holes towards the part to be welded. The shielding gas ejected by the nozzle can prevent oxygen from entering the part to be welded and burning the part to be welded, forming a relatively enclosed space at the part to be welded, further ensuring the welding quality of the part to be welded. Description of the Drawings

[0015] The following further illustrates the present utility model in conjunction with the drawings and embodiments.

[0016] Figure 1 It is a schematic diagram of a seam - less welding device provided by an embodiment of the present utility model;

[0017] Figure 2 It is a front - facing front view of the inner and outer vehicle sheet metals of a vehicle welded together provided by an embodiment of the present utility model;

[0018] Figure 3 It is a reverse - facing front view of the inner and outer vehicle sheet metals of a vehicle welded together provided by an embodiment of the present utility model.

[0019] The reference numerals in the description are as follows:

[0020] 1. Power supply; 2. Silicon bronze welding wire; 3. Welding head; 4. Nozzle; 41. Spray hole; 5. Coiling roller; 61. Driving part; 62. First roller body; 63. Second roller body; 7. Workpiece to be welded; 71. Outer sheet metal of vehicle; 72. Inner sheet metal of vehicle; 721. Plug welding hole; 73. Welding part to be welded. Detailed implementation mode

[0021] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the following further details the utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0022] It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "middle", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model.

[0023] As Figure 1 shown, a seamless welding device provided by the first embodiment of the present utility model includes a power supply 1, a silicon bronze welding wire 2, a welding head 3 and a nozzle 4; the first electrode of the power supply 1 is electrically connected to the silicon bronze welding wire 2, and the second electrode of the power supply 1 is electrically connected to the workpiece to be welded 7; the free end of the silicon bronze welding wire 2 passes through the welding head 3 and is conveyed to the welding part 73 of the workpiece to be welded 7, and the nozzle 4 is used to spray a shielding gas onto the welding part 73 while the silicon bronze welding wire 2 welds the welding part 73. It can be understood that the silicon bronze welding wire 2 contains silicon element, copper element, etc., and the silicon bronze welding wire 2 has a lower melting point; the shielding gas includes, but is not limited to, gases such as carbon dioxide and nitrogen; the positive electrode of the power supply 1 is electrically connected to the silicon bronze welding wire 2, and the negative electrode of the power supply 1 is electrically connected to the workpiece to be welded 7.

[0024] In the present utility model, the first electrode of the power supply 1 is electrically connected to the silicon bronze welding wire 2, and the second electrode of the power supply 1 is electrically connected to the workpiece to be welded 7; the free end of the silicon bronze welding wire 2 passes through the welding head 3 and is conveyed to the welding part 73 of the workpiece to be welded 7; during the process of welding the workpiece to be welded 7 with the silicon bronze welding wire 2, since the melting point of the silicon bronze welding wire 2 is relatively low, the workpiece to be welded 7 basically does not melt, so that no deformation accident will occur to the workpiece to be welded 7 during the welding process. It is particularly suitable for welding the curved surface part of the workpiece to be welded 7, ensuring the welding quality of the workpiece to be welded 7 and improving the aesthetics and manufacturing efficiency of the workpiece to be welded. In addition, during the process of welding the workpiece to be welded 7 with the silicon bronze welding wire 2, the nozzle 4 sprays a shielding gas through the spray hole 41 towards the welding part 73. The shielding gas sprayed by the nozzle 4 can prevent oxygen from entering the welding part 73 and burning the workpiece to be welded, forming a relatively closed space at the welding part 73, further ensuring the welding quality of the workpiece to be welded 7.

[0025] When the workpiece to be welded 7 includes the inner vehicle sheet metal 72 and the outer vehicle sheet metal 71, the silicon bronze welding wire 2 can weld the inner vehicle sheet metal 72 to the outer vehicle sheet metal 71. And since the melting point of the silicon bronze welding wire 2 is relatively low, the inner and outer vehicle sheet metals basically do not melt, so that no deformation accident will occur to the inner and outer vehicle sheet metals during the welding process. It is particularly suitable for welding the curved surface part of the vehicle sheet metal, ensuring the welding quality of the vehicle sheet metal and improving the aesthetics and manufacturing efficiency of the vehicle.

[0026] In one embodiment, as Figure 1 shown, the seam - less welding device further includes a winding roller 5; one end of the silicon bronze welding wire 2 far from the free end is wound around the winding roller 5. It can be understood that there is a relatively large amount of the silicon bronze welding wire 2 wound on the winding roller 5, and the winding roller 5 can continuously convey the silicon bronze welding wire 2 to the welding head 3, enabling the seam - less welding device to continuously perform welding. In this embodiment, the use and operation of the seam - less welding device are convenient.

[0027] In one embodiment, as Figure 1 shown, the seam - less welding device further includes a wire feeding mechanism provided with a conveying space, and the free end of the silicon bronze welding wire 2 passes through the conveying space and is inserted into the welding head 3. It can be understood that the wire feeding mechanism includes, but is not limited to, a roller pressing mechanism, an extrusion mechanism, etc. The wire feeding mechanism can convey the silicon bronze welding wire 2 wound on the winding roller 5 into the welding head 3, improving the automation degree of the seam - less welding device.

[0028] In one embodiment, as Figure 1As shown, the wire feeding mechanism includes a driving member 61, and a first roller 62 and a second roller 63 which are spaced apart. The conveying space is arranged between the first roller 62 and the second roller 63; the driving member 61 is connected to the first roller 62 and / or the second roller 63 and is used to drive the first roller 62 and / or the second roller 63 to rotate. It can be understood that the driving member 61 includes but is not limited to a motor, etc. A part of the silicon bronze welding wire 2 is squeezed by the first roller 62 and the second roller 63 in the conveying space.

[0029] Specifically, during the process that the driving member 61 drives the first roller 62 and / or the second roller 63 to rotate, while the first roller 62 and the second roller 63 convey the silicon bronze welding wire 2 to the welding head 3, the coiling roller 5 will release the silicon bronze welding wire 2. In this embodiment, the structure of the wire feeding mechanism is simple and the manufacturing cost is low.

[0030] In one embodiment, as Figure 1 shown, the welding head 3 is provided with a through hole, and the free end of the silicon bronze welding wire 2 sequentially passes through the conveying space and the through hole and then is conveyed to the welding part 73 to be welded. It can be understood that the free end of the silicon bronze welding wire 2 extends into the welding part 73 after passing through the through hole of the welding head 3. The design of the through hole ensures that the welding head 3 can stably convey the silicon bronze welding wire 2 to the welding part 73 to be welded.

[0031] In one embodiment, the trace-free welding device further includes an air pump (not shown in the figure) communicating with the nozzle 4, and the air pump is used to drive the shielding gas to spray towards the welding part 73 through the nozzle 4. It can be understood that the air pump can convey the shielding gas therein to the nozzle 4.

[0032] In one embodiment, as Figure 1 shown, the nozzle 4 is provided with spray holes 41 for spraying the shielding gas, and the welding head 3 is installed in the spray holes 41. Preferably, the nozzle 4 and the welding head 3 are integrally formed. It can be understood that the welding head 3 is located in the spray holes 41 of the nozzle 4. Thus, when the nozzle 4 conveys the silicon bronze welding wire 2 to the welding part 73 to be welded, the nozzle 4 can spray the shielding gas towards the welding part 73. The shielding gas sprayed by the nozzle 4 can prevent oxygen from entering the welding part 73 and burning the sheet metal, and form a relatively closed space at the welding part 73, further ensuring the welding quality of the vehicle sheet metal.

[0033] In one embodiment, as Figures 1 to 3As shown, the workpiece to be welded 7 includes an inner vehicle sheet metal 72 and an outer vehicle sheet metal 71. A plug weld hole 721 is provided at the welding part 73 of the inner vehicle sheet metal 72. The silicon bronze welding wire 2 is used to weld the edge of the plug weld hole 721 to the outer vehicle sheet metal 71. It can be understood that during the process of fixing and welding the edge of the plug weld hole 721 to the outer vehicle sheet metal 71 with the silicon bronze welding wire 2, the welding posture of the silicon bronze welding wire 2 can be adjusted, solving the problem of the limitation of the welding angle during the welding of the curved sheet metal by this seam - less welding device, and further improving the welding quality and efficiency of the vehicle sheet metal.

[0034] In this embodiment, during the process of using the silicon bronze welding wire 2 to weld the inner vehicle sheet metal 72 and the outer vehicle sheet metal 71 by this seam - less welding device, since the melting point of the silicon bronze welding wire 2 is relatively low, the inner vehicle sheet metal 72 and the outer vehicle sheet metal 71 basically will not melt. Thus, accidents of deformation will not occur to the inner vehicle sheet metal 72 and the outer vehicle sheet metal 71 during the welding process. It is especially suitable for welding the curved parts of the vehicle sheet metal, ensuring the welding quality of the vehicle sheet metal and improving the aesthetics of the vehicle. In addition, during the process of welding the inner and outer sheet metals of the vehicle with the silicon bronze welding wire 2, the nozzle 4 is used to spray a shielding gas through the spray hole 41 towards the welding part 73. The shielding gas sprayed by the nozzle 4 can prevent oxygen from entering the welding part 73 and burning the sheet metal, forming a relatively enclosed space at the welding part 73, further ensuring the welding quality of the vehicle sheet metal.

[0035] In one embodiment, the seam - less welding device further includes a welding housing (not shown in the figure) with an internal space. The power supply 1 is installed in the internal space, and both the welding head 3 and the nozzle 4 are installed on the welding housing. It can be understood that the wire feeding mechanism is also installed in the internal space, and both the welding head 3 and the nozzle 4 are installed at the end of the welding housing. In this embodiment, the design of the welding housing improves the convenience of using this seam - less welding device.

[0036] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A seamless welding device, characterized in that, It includes a power source, a silicon bronze welding wire, a welding head and a nozzle; the first electrode of the power source is electrically connected to the silicon bronze welding wire, and the second electrode of the power source is electrically connected to the workpiece to be welded; the free end of the silicon bronze welding wire passes through the welding head and is delivered to the welding part of the workpiece to be welded. While the silicon bronze welding wire welds the welding part, the nozzle is used to spray a shielding gas to the welding part.

2. The seamless welding device according to claim 1, characterized in that, The seam - less welding device further includes a winding roller; one end of the silicon bronze welding wire far from the free end is wound around the winding roller.

3. The seamless welding device according to claim 1, characterized in that, The seam - less welding device further includes a wire feeding mechanism provided with a conveying space, and the free end of the silicon bronze welding wire passes through the conveying space and is inserted into the welding head.

4. The seamless welding device according to claim 3, wherein, The wire feeding mechanism includes a driving member, a first roller body and a second roller body arranged at intervals, and the conveying space is arranged between the first roller body and the second roller body; the driving member is connected to the first roller body and / or the second roller body and is used to drive the first roller body and / or the second roller body to rotate.

5. The seamless welding device according to claim 3, characterized in that, A through - hole is provided on the welding head, and the free end of the silicon bronze welding wire passes through the conveying space and the through - hole in sequence and then is delivered to the welding part.

6. The seamless welding device according to claim 1, characterized in that, The seam - less welding device further includes an air pump communicating with the nozzle, and the air pump is used to drive the shielding gas to be sprayed to the welding part through the nozzle.

7. The seamless welding device according to claim 1, characterized in that, The nozzle is provided with spray holes for spraying the shielding gas, and the welding head is installed in the spray holes.

8. The seamless welding device according to claim 7, characterized in that, The nozzle and the welding head are integrally formed parts.

9. The seamless welding device according to claim 1, characterized in that The workpiece to be welded includes an inner vehicle sheet metal and an outer vehicle sheet metal. A plug - weld hole is provided at the welding part of the inner vehicle sheet metal, and the silicon bronze welding wire is used to weld the edge of the plug - weld hole to the outer vehicle sheet metal.

10. The seamless welding device according to claim 1, characterized in that, The seam - less welding device further includes a welding housing provided with an internal space, the power source is installed in the internal space, and both the welding head and the nozzle are installed on the welding housing.

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