Welding protection structure and welding device

Abstract

The utility model relates to a welding protection structure and a welding device.The welding protection structure comprises a top plate, a bottom plate, an inner frame part and a plurality of first air pipes, the top plate is of an arc-shaped structure, the bottom plate is provided with a plurality of air outlet holes, the inner frame part is connected between the top plate and the bottom plate, and an inner cavity is defined by the inner frame part, the top plate and the bottom plate jointly; the first air pipes are arranged in the inner cavity in an arc shape, and the multiple first air pipes are connected with the inner frame part and communicate with an air source so as to be used for conveying air of the air source to the inner cavity. According to the scheme, the welding protection structure and the welding device can play a good role in protecting the welding joint.

Description

Technical Field

[0001] The present application belongs to the technical field of welding process equipment, and specifically relates to a welding protection structure and a welding device. Background Art

[0002] Welding is the most widely used assembly connection method in the automotive industry. Titanium alloy products are lighter, stronger and more corrosion-resistant, which can reduce the weight of the vehicle body and improve the safety of the vehicle.

[0003] However, titanium is an active metal that reacts quickly with oxygen, nitrogen, and hydrogen at high temperatures. Titanium and its alloys have poor thermal conductivity, slow cooling, and long high-temperature residence times. In addition, titanium is highly active, and the welding gun bodies commonly used in industrial production have poor gas stability and small nozzle diameters, making it difficult to ensure the performance of welding joints of titanium and its alloys. Utility Model Content

[0004] The purpose of the present application is to provide a welding protection structure and a welding device, which can provide good protection for welding joints.

[0005] The first aspect of the present application discloses a welding protection structure, comprising: a top plate, a bottom plate, an inner frame and a plurality of first air pipes, the top plate being an arc-shaped structure, the bottom plate being provided with a plurality of air outlet holes, the inner frame being connected between the top plate and the bottom plate, and together with the top plate and the bottom plate forming an inner cavity, the first air pipes being arranged in an arc shape in the inner cavity, the plurality of first air pipes being connected to the inner frame and being connected to a gas source for conveying gas from the gas source to the inner cavity.

[0006] In an exemplary embodiment of the present application, the center of each of the first air pipes arranged in an arc shape is the same as the center of the top plate.

[0007] In an exemplary embodiment of the present application, the first air pipe is provided with a plurality of first exhaust holes at intervals along the length direction of the first air pipe, and the openings of each of the first exhaust holes are facing the bottom plate; the aperture range value of the first exhaust holes is 0.8-1.2mm; the spacing range value between two adjacent first exhaust holes is 4-6mm.

[0008] In an exemplary embodiment of the present application, the distance between each of the first air tubes and the top plate ranges from 4 to 6 mm; and / or the arc range between two adjacent first air tubes ranges from π / 8 to π / 4.

[0009] In an exemplary embodiment of the present application, the welding protection structure also includes a second air pipe located in the central area of ​​the inner cavity, one end of the second air pipe is passed through one side of the inner frame portion, and is used to connect with the nozzle of the welding gun; the other end of the second air pipe is passed through the other side of the inner frame portion, and is used to connect with the gas source; the second air pipe is provided with a plurality of second exhaust holes spaced apart along its length direction, and the opening of each of the second exhaust holes faces the bottom plate.

[0010] In an exemplary embodiment of the present application, the welding protection structure also includes an outer frame portion arranged around the inner frame portion, the outer frame portion includes a top end surface and a bottom end surface arranged opposite to each other, and the top end surface of the outer frame portion is connected to the top plate; wherein the bottom end surface of the outer frame portion is farther away from the top plate relative to the bottom plate in a direction from the top plate toward the bottom plate.

[0011] In an exemplary embodiment of the present application, a vertical spacing range value between a bottom end surface of the outer frame portion and the bottom plate in a direction from the top plate toward the bottom plate is 4-6 mm.

[0012] In an exemplary embodiment of the present application, a spacing space is provided between the outer frame portion and the inner frame portion, and the spacing space and the space on the side of the bottom plate away from the top plate together form an outer cavity; the outer cavity is connected to the inner cavity through the multiple air outlet holes.

[0013] In an exemplary embodiment of the present application, the apertures of the air outlet holes range from 1 to 1.5 mm; the air outlet holes are arranged in an array, and the spacing between two adjacent air outlet holes ranges from 8 to 12 mm.

[0014] A second aspect of the present application discloses a welding device, comprising a gas source, a welding gun and the above-mentioned welding protection structure, wherein the welding protection structure is connected to the gas source and the welding gun.

[0015] This application scheme has the following beneficial effects:

[0016] In the embodiment of the present application, since the first air pipes are arranged in an arc shape in the inner cavity, after the gas from the gas source is transported to the inner cavity through the first air pipes, a part of the gas can directly form a uniform and stable laminar flow and flow out through the multiple air outlets of the bottom plate to provide good protection for the welding joints, and the other part of the gas flows toward the top plate with an arc structure, and forms a uniform and stable laminar flow again after being blocked by the top plate with an arc structure, so as to flow toward the bottom plate, and finally also flows out through the multiple air outlets of the bottom plate to provide good protection for the welding joints.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. Among them, the drawings here are used to represent the utility model concept of the present application, and are not completely equivalent to the structure of the actual product protected by the present application.

[0019] Figure 1 A schematic diagram of the side structure of a welding protection structure in an embodiment of the utility model is shown from the left side perspective.

[0020] Figure 2 A partial top view of the welding protection structure in one embodiment of the utility model is shown.

[0021] Figure 3 The figure shows a schematic structural diagram of a welding device in one embodiment of the utility model.

[0022] Description of Figure Numbers:

[0023] 10. Welding protection structure; 11. Top plate; 12. Inner frame; 13. Bottom plate; 14. First air pipe; 15. Second air pipe; 16. Outer frame; 20. Air source; 30. Welding gun; 31. Nozzle; 40. Workpiece; 50. First flow meter; 60. Second flow meter; 101. Inner cavity; 102. Outer cavity. DETAILED DESCRIPTION

[0024] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0025] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0026] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application.

[0027] Generally speaking, when welding titanium and its alloys, the molten metal and heat-affected zone must be well protected and the temperature must be controlled below 300°C. For titanium and titanium alloy weldments, the nozzle is not enough to protect the high-temperature metal in the weld area, and an additional titanium alloy welding protection structure - a drag hood is required. The welding protection structure is attached to the back of the welding torch to protect the cooling weld and heat-affected zone. At the same time, the welding process is not strictly controlled, there are many welding defects, and the weld performance cannot meet the requirements.

[0028] Based on this, combined Figures 1 to 3 As shown, this embodiment provides a welding protection structure 10, which can be used to weld titanium alloy materials during the use of the welding device in the welding production line, and protect the high-temperature metal in the weld area during the titanium alloy welding process to obtain good welding quality of the titanium alloy.

[0029] It should be understood that the welding protection structure 10 in this embodiment has an independent gas source 20 .

[0030] Combination Figure 1 As shown, the welding protection structure 10 includes an arc-shaped top plate 11. For example, the top plate 11 has the same curvature shape as the weld, and its length and width depend on the heat dissipation degree of the weld and the welding speed, which are not limited here.

[0031] In this embodiment, the top plate 11 is a nearly semi-cylindrical shell with a radius range of 40-50 mm. Optionally, the radius of the top plate 11 is 40 mm, 42 mm, 43 mm, 45 mm, 47 mm, 49 mm or 50 mm.

[0032] Combination Figure 1 As shown, the welding protection structure 10 also includes a hollow inner frame 12, the top surface of the inner frame 12 is connected to the top plate 11, and the hollow area of ​​the inner frame 12 is covered by the top plate 11. In this embodiment, the inner frame 12 is a rectangular frame. Of course, in other embodiments, the inner frame 12 can also be other shapes, which is not limited here.

[0033] Combination Figure 1 and Figure 2As shown, the welding protection structure 10 further includes a bottom plate 13, the bottom plate 13 is connected to the bottom surface of the inner frame 12, the bottom plate 13 is arranged opposite to the top plate 11, and covers the hollow area of ​​the inner frame 12. In this embodiment, the bottom plate 13 is a rectangular plate. Of course, in other embodiments, the shape of the bottom plate 13 can also be adaptively changed as the shape of the inner frame 12 changes, which is not limited here.

[0034] Furthermore, the bottom plate 13 is provided with a plurality of air outlet holes, and the plurality of air outlet holes penetrate through the bottom plate 13 to be connected to the inner cavity 101 .

[0035] It should be understood that when the bottom plate 13 is not provided with a plurality of vents, the bottom plate 13 and the top plate 11 are respectively connected to two opposite sides of the inner frame 12, and after covering the hollow area of ​​the inner frame 12, the bottom plate 13, the top plate 11 and the inner frame 12 together form a closed inner cavity 101. When the bottom plate 13 is provided with a plurality of vents, the inner cavity 101 can be connected to the external environment through the vents.

[0036] Combination Figure 1 and Figure 2 As shown, the welding protection structure 10 also includes a plurality of first air pipes 14 , each of which is arranged in an arc shape in the inner cavity 101 , and the plurality of first air pipes 14 are connected to the inner frame 12 and connected to the gas source 20 for conveying the gas from the gas source 20 to the inner cavity 101 .

[0037] It should be understood that if multiple first air pipes 14 are arranged at intervals along the same direction on the same horizontal plane and the interval distance is small, the gas discharged from the first air pipes 14 in the middle area of ​​the multiple first air pipes 14 overlaps greatly with the gas discharged from the first air pipes 14 in the edge area, which can easily cause the overall gas discharged from the multiple first air pipes 14 to be uneven. The first air pipes 14 are arranged in an arc shape in the inner cavity 101. Since the first air pipes 14 in the middle area of ​​the arc have a height difference with the first air pipes 14 in the edge area of ​​the arc, the probability of gas overlap can be reduced, and finally a uniform laminar flow can be formed.

[0038] In this embodiment, since the first air pipes 14 are arranged in an arc shape in the inner cavity 101, after the gas from the gas source 20 is transported to the inner cavity 101 through the first air pipes 14, a part of the gas can directly form a uniform and stable laminar flow and flow out through the multiple air outlets of the bottom plate 13 to provide good protection for the welding joints, and the other part of the gas flows toward the top plate 11 with an arc structure, and forms a uniform and stable laminar flow again after being blocked by the top plate 11 with an arc structure, so as to flow toward the bottom plate 13, and finally also flows out through the multiple air outlets of the bottom plate 13 to provide good protection for the welding joints.

[0039] Furthermore, the center of each first air pipe 14 after being arranged in an arc shape is the same as the center of the top plate 11 to adapt to the shape of the top plate 11, so that the gas flowing toward the top plate 11 with an arc structure can form a more uniform and stable laminar flow after being blocked by the top plate 11.

[0040] Furthermore, the first air pipe 14 is provided with a plurality of first exhaust holes at intervals along the length direction of the first air pipe 14 , and the opening of each first exhaust hole faces the bottom plate 13 , so that the gas flowing out of the first air pipe 14 can quickly pass through the bottom plate 13 through the exhaust holes.

[0041] Further, the aperture value of the first exhaust hole is in the range of 0.8-1.2 mm. Optionally, the aperture value of the first exhaust hole is 0.8 mm, 0.9 mm, 1 mm, 1.1 mm or 1.2 mm.

[0042] Further, the spacing between two adjacent first exhaust holes is in the range of 4-6 mm. Optionally, the spacing between two adjacent first exhaust holes is 4 mm, 4.5 mm, 5 mm, 5.5 mm or 6 mm.

[0043] Further, the spacing between each first air tube 14 and the top plate 11 ranges from 4 to 6 mm. Optionally, the spacing between each first air tube 14 and the top plate 11 ranges from 4 mm, 4.5 mm, 5 mm, 5.5 mm or 6 mm.

[0044] Further, the arc value between two adjacent first air tubes 14 ranges from π / 8 to π / 4. Optionally, the arc value between two adjacent first air tubes 14 is π / 8, π / 7, π / 6, π / 5 or π / 4.

[0045] Furthermore, the welding protection structure 10 further includes a second air pipe 15 located in the central area of ​​the inner cavity 101, one end of the second air pipe 15 is provided through one side of the inner frame 12, and is used to connect with the nozzle 31 of the welding gun 30; the other end of the second air pipe 15 is provided through the other side of the inner frame 12, and is used to connect with the gas source 20. The second air pipe 15 is provided with a plurality of second exhaust holes at intervals along its length direction, and the opening of each second exhaust hole faces the bottom plate 13.

[0046] It should be understood that the second air pipe 15 can be matched with the gas shielding nozzle 31 of the welding gun 30 (for example, the outer diameter of the welding gun 30 is 30 mm), and can be tightly and flexibly connected with the nozzle 31 during use. When the openings of the second air pipe 15 are all facing the base plate 13, the gas delivered to the second air pipe 15 by the gas source 20 can be delivered not only to the inner cavity 101, but also to the nozzle 31 of the welding gun 30 to supplement the gas required by the nozzle 31 under special circumstances; in addition, the excess gas flowing out of the nozzle 31 can also be delivered to the inner cavity 101 via the second air pipe 15.

[0047] Further, the center distance between the second air pipe 15 and the top plate 11 ranges from 15 to 20 mm. Optionally, the center distance between the second air pipe 15 and the top plate 11 ranges from 15 mm, 16 mm, 17 mm, 18 mm, 19 mm or 20 mm.

[0048] Furthermore, the first air pipe 14 and the second air pipe 15 are both copper tubes, and have the advantages of durability, stability, reliability, hygiene, strong firmness and economy.

[0049] Furthermore, the welding protection structure 10 also includes an outer frame portion 16 arranged around the inner frame portion 12, the outer frame portion 16 includes a top end surface and a bottom end surface arranged opposite to each other, and the top end surface of the outer frame portion 16 is connected to the top plate 11; wherein, the bottom end surface of the outer frame portion 16 is farther away from the top plate 11 relative to the bottom plate 13 in the direction from the top plate 11 toward the bottom plate 13, so as to be used for contacting the workpiece 40.

[0050] It should be understood that when the bottom end surface of the outer frame portion 16 contacts the workpiece 40, the space between the workpiece 40 and the outer frame portion 16, the inner frame portion 12 and the bottom plate 13 (excluding the case where an air outlet is provided) forms an enclosed space (i.e., the outer cavity 102) to achieve another diversion of the gas after it flows through the bottom plate 13 to the enclosed space.

[0051] Further, the vertical spacing between the bottom end surface of the outer frame 16 and the bottom plate 13 from the top plate 11 to the bottom plate 13 ranges from 4 to 6 mm. Optionally, the vertical spacing between the bottom end surface of the outer frame 16 and the bottom plate 13 from the top plate 11 to the bottom plate 13 ranges from 4 mm, 4.5 mm, 5 mm, 5.5 mm or 6 mm.

[0052] Furthermore, a spacing space is provided between the outer frame portion 16 and the inner frame portion 12 , and the spacing space and the space on the side of the bottom plate 13 away from the top plate 11 together form an outer cavity 102 ; the outer cavity 102 is connected to the inner cavity 101 through a plurality of air outlets.

[0053] It should be understood that, when the bottom end surface of the outer frame 16 contacts the workpiece 40, the space between the workpiece 40 and the outer frame 16, the inner frame 12 and the bottom plate 13 is the outer cavity 102. Among them, when a separation space is provided between the outer frame 16 and the inner frame 12, after the bottom end surface of the outer frame 16 contacts the workpiece 40, the enclosed space formed between the workpiece 40 and the outer frame 16 and the bottom plate 13 (without considering the case where the gas outlet is provided) is larger, that is, the outer cavity 102 is larger and can accommodate more gas.

[0054] Furthermore, the distance between the outer frame portion 16 and the inner frame portion 12 gradually increases from the top plate 11 toward the bottom plate 13 to increase the volume of the outer cavity 102 .

[0055] Further, the aperture of the air outlet hole is in the range of 1-1.5 mm. Optionally, the aperture of the air outlet hole is 1 mm, 1.2 mm, 1.3 mm, 1.4 mm or 1.5 mm.

[0056] Further, the air outlet holes are arranged in an array, and the spacing between two adjacent air outlet holes is in the range of 8-12 mm. Optionally, the spacing between two adjacent air outlet holes is 8 mm, 9 mm, 10 mm, 11 mm or 12 mm.

[0057] Combination Figure 3 As shown, this embodiment further provides a welding device, which includes a gas source 20, a welding gun 30 and the above-mentioned welding protection structure 10, and the welding protection structure 10 is connected to the gas source 20 and the welding gun 30. In this embodiment, the gas stored in the gas source 20 is argon gas.

[0058] Furthermore, the welding device includes two gas sources 20 , one of the two gas sources 20 is connected to the first gas pipe 14 and the second gas pipe 15 of the welding protection structure 10 , and the other gas source 20 is connected to the welding gun 30 .

[0059] Furthermore, the welding device also includes a first flow meter 50 and a second flow meter 60. The first flow meter 50 is arranged on the pipeline connecting the gas source 20 to the welding gun 30, so as to monitor the flow rate of the gas source 20 flowing to the welding gun 30; the second flow meter 60 is arranged on the pipeline connecting the gas source 20 to the welding protection structure 10, so as to monitor the flow rate of the gas source 20 flowing to the welding protection structure 10.

[0060] In summary, due to the addition of the welding protection structure 10, the quality stability of the titanium alloy welded joint can be higher, the width of the overheating zone of the titanium alloy welded joint can be smaller and the performance can be higher, and the titanium alloy welding yield rate and production efficiency can be higher.

[0061] In this application, unless otherwise clearly specified and limited, the terms "assembly", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined. And the description of the terms "some embodiments", "exemplarily", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application.

[0063] The schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradicting each other.

[0064] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made according to the claims and description of the present application should fall within the scope of the patent of this application.

Claims

1. A welding protection structure, characterized in that: include: roof; The top plate is in an arc-shaped structure; Bottom plate; the bottom plate is provided with a plurality of air outlet holes; An inner frame portion, the inner frame portion is connected between the top plate and the bottom plate, and together with the top plate and the bottom plate, forms an inner cavity; A plurality of first air pipes are arranged in an arc shape in the inner cavity, and the plurality of first air pipes are connected to the inner frame and connected to an air source so as to transport the gas of the air source to the inner cavity.

2. The welding protection structure according to claim 1, characterized in that: The center of each of the first air pipes arranged in an arc shape is the same as the center of the top plate.

3. The welding protection structure according to claim 1, characterized in that: The first air pipe is provided with a plurality of first exhaust holes at intervals along the length direction of the first air pipe, and the opening of each of the first exhaust holes faces the bottom plate; The aperture of the first exhaust holes ranges from 0.8 to 1.2 mm; the distance between two adjacent first exhaust holes ranges from 4 to 6 mm.

4. The welding protection structure according to claim 1, characterized in that: The distance between each of the first air pipes and the top plate is in the range of 4-6 mm; and / or, The arc range between two adjacent first air pipes is π / 8-π / 4.

5. The welding protection structure according to claim 1, characterized in that: The welding protection structure further includes a second air pipe located in the central area of ​​the inner cavity, one end of the second air pipe is passed through one side of the inner frame and is used to be connected to the nozzle of the welding gun; the other end of the second air pipe is passed through the other side of the inner frame and is used to be connected to the air source; The second air pipe is provided with a plurality of second exhaust holes at intervals along the length direction thereof, and the opening of each of the second exhaust holes faces the bottom plate.

6. The welding protection structure according to claim 1, characterized in that: The welding protection structure further includes an outer frame portion arranged around the inner frame portion, the outer frame portion includes a top end surface and a bottom end surface arranged opposite to each other, and the top end surface of the outer frame portion is connected to the top plate; wherein, The bottom end surface of the outer frame is farther away from the top plate than the bottom plate in a direction from the top plate toward the bottom plate.

7. The welding protection structure according to claim 6, characterized in that: The vertical spacing between the bottom end surface of the outer frame and the bottom plate in the direction from the top plate to the bottom plate ranges from 4 to 6 mm.

8. The welding protection structure according to claim 6, characterized in that: A spacing space is provided between the outer frame portion and the inner frame portion, and the spacing space and a space on a side of the bottom plate away from the top plate together form an outer cavity; The outer cavity is communicated with the inner cavity through the plurality of air outlet holes.

9. The welding protection structure according to claim 8, characterized in that: The apertures of the air outlet holes range from 1 to 1.5 mm; the air outlet holes are arranged in an array, and the spacing between two adjacent air outlet holes ranges from 8 to 12 mm.

10. A welding device, characterized in that: It comprises a gas source, a welding gun and the welding protection structure according to any one of claims 1 to 9, wherein the welding protection structure is connected to the gas source and the welding gun.

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