Gas protection device

Abstract

The invention discloses a gas protection device, relates to the technical field of laser welding, and aims to solve the problem that the welding quality is affected due to high operation difficulty during gas protection in the welding process. The gas protection device comprises a connecting frame and a body, wherein the connecting frame is used for mounting a welding head; the body is arranged on the connecting frame, a first through groove is formed in a first face of the body and used for covering a welding seam of a welding workpiece, a first through hole is formed in the body and communicated with the first through groove, the first through hole is used for introducing tail support gas into the first through groove, and the body is provided with a first gas channel. The body is provided with a first gas channel, the first gas channel is used for introducing molten pool protection gas into the molten pool, the body is provided with a second gas channel, the second gas channel is located above the first gas channel, and the second gas channel is used for introducing plume inhibition gas into the upper portion of the molten pool for welding workpieces.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding, and in particular to a gas protection device. Background Art

[0002] In high-power laser welding, the welding pool, the high-temperature area of ​​the weld and other areas need to be gas-protected at the same time to reduce and avoid welding defects such as cracks and pores in the weld. The shielding gas can not only isolate oxygen and other harmful gases in the air and prevent oxidation reactions in the welding area, but also reduce the spatter and smoke generated during welding and keep the welding area clean. However, most of the existing gas protection devices are designed for a single gas or a limited combination of gases, which leads to the use of multiple gas protection devices to protect the welding pool and the high-temperature area of ​​the weld respectively, so multiple devices need to operate and cooperate simultaneously. Therefore, during the welding process, the simultaneous operation of multiple devices requires a large space and requires simultaneous coordination, which increases the difficulty of operation and affects the quality of welding. Summary of the invention

[0003] The object of the present invention is to provide a gas protection device for integrating multiple gases to save space occupied by the device, reduce the difficulty of operation, and thus improve the quality of welding.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A gas protection device, comprising:

[0006] A connecting frame, which is used to install the welding head;

[0007] The main body is arranged on the connecting frame and has a first surface and a second surface relative to each other. A first through groove is provided on the first surface of the main body, and the first through groove is used to cover the weld of the welding workpiece; a first through hole is provided on the main body, and the first through hole is connected with the first through groove, and is used to introduce tail support gas into the first through groove; the main body is provided with a first gas channel, and the first gas channel passes through the first surface and the second surface, and the extension line of the axis of the first gas channel intersects with the first surface, and the first gas channel is used to introduce molten pool protection gas into the molten pool of the welding workpiece; the main body is provided with a second gas channel, and the second gas channel is located above the first gas channel, and the second gas channel is used to introduce plume suppression gas above the molten pool of the welding workpiece.

[0008] Optionally, in the above-mentioned gas protection device, a receiving groove is further provided on the second surface of the main body, and the receiving groove has three side walls. The opening direction of the receiving groove and the outlet direction of the first gas channel are located on the same side of the main body. The gas protection device also includes a first ventilation component, which is fixedly arranged in the receiving groove. The first ventilation component is provided with a second through hole, and the second through hole is used to pass the feather suppression gas. A first gas guide groove is provided on the surface of the first ventilation component in contact with the receiving groove, and the contact surface of the first gas guide groove and the receiving groove forms a first cavity. The second gas channel includes a first cavity and a second through hole. The first cavity is connected to the second through hole, and the first cavity is used to guide the gas to flow above the molten pool.

[0009] Optionally, in the above-mentioned gas protection device, the main body is further provided with a third gas channel, the third gas channel is located above the second gas channel, and the third gas channel is used to introduce plume suppression gas above the molten pool of the welding workpiece.

[0010] Optionally, in the above-mentioned gas protection device, the gas protection device also includes a second ventilation component, the second ventilation component is fixed on the main body, a third through hole is opened on the second ventilation component, the third through hole is used to pass the plume suppression gas, and a second gas guide groove is opened on the surface of the second ventilation component in contact with the main body, and the contact surface of the second gas guide groove and the main body forms a second cavity, and the third gas channel includes the second cavity and the third through hole, the second cavity is connected with the third through hole, the second gas guide groove is located above the first gas guide groove, and the groove width of the second gas guide groove is greater than the groove width of the first gas guide groove, and the second cavity is used to guide the gas to flow above the molten pool.

[0011] Optionally, in the above-mentioned gas protection device, the gas protection device further comprises:

[0012] The first angle adjustment member is fixedly arranged on the second surface of the main body, the first angle adjustment member is rotatably connected to the connecting frame, and the rotation axis of the first angle adjustment member is parallel to the first surface of the main body.

[0013] Optionally, in the above-mentioned gas protection device, the connecting frame includes:

[0014] A first connecting block, the first connecting block is rotatably connected to the first angle adjusting member, and the first connecting block rotates with the first angle adjusting member as a rotation axis;

[0015] The first rotating shaft is rotatably connected to the first connecting block, the rotating axis of the first rotating shaft and the rotating axis of the first angle adjusting member are perpendicular to each other, and the welding head is fixedly arranged at one end of the first rotating shaft.

[0016] Optionally, in the above-mentioned gas protection device, at least two first threaded holes are provided on the second surface of the main body, and the gas protection device also includes a first threaded connecting piece, and a first strip-shaped groove corresponding to the number of the first threaded holes is provided on the first angle adjustment piece, and the length direction of the first strip-shaped groove is parallel to the rotation axis of the first angle adjustment piece, and the first threaded connecting piece is connected to the first threaded hole through the first strip-shaped groove; so that the first angle adjustment piece is fixed to the second surface of the main body.

[0017] Optionally, in the above-mentioned gas protection device, the gas protection device also includes an air knife, which is fixedly connected to the connecting frame. The wind curtain formed by the air knife is used to be set at the outlet of the second gas channel to suppress the diffusion of plume.

[0018] Optionally, in the above-mentioned gas protection device, the connecting frame further includes:

[0019] A second connecting block, the second connecting block is rotatably connected to the first rotating shaft, and the first connecting block rotates with the first angle adjusting member as the rotating shaft;

[0020] A second rotating shaft, the second rotating shaft is rotatably connected to the second connecting block, and a rotation axis of the second rotating shaft is respectively perpendicular to a rotation axis of the first angle adjusting member and a rotation axis of the first rotating shaft;

[0021] A second angle adjustment member, the second angle adjustment member is rotatably connected to the second rotating shaft, the side wall of the gas knife is provided with at least two second threaded holes, the gas protection device also includes a second threaded connection member, the second angle adjustment member is provided with second strip grooves corresponding to the number of the second threaded holes, the length direction of the second strip grooves is perpendicular to the rotation axis of the second rotating shaft, the second threaded connection member is connected to the second threaded holes through the second strip grooves, so that the gas knife is fixed on the second angle adjustment member.

[0022] Optionally, in the above-mentioned gas protection device, the gas protection device further includes a first mesh plate, mesh holes are evenly arranged on the first mesh plate, the first mesh plate is fixed to the first surface of the body, and covers the first through groove.

[0023] Compared with the prior art, when the gas protection device provided by the present invention is used to realize gas protection during welding, the main body is set on the welding workpiece so that the first through groove on the first surface covers the weld of the welding workpiece, and the tail support gas enters the first through groove through the first through hole on the main body, providing a stable gas environment for the weld area from the beginning to the end of welding; the first gas channel is aligned with the molten pool position at a certain angle, and the molten pool protection gas is introduced into the first gas channel, and the gas effectively isolates the oxygen in the air, prevents the molten pool from oxidizing, and assists the cooling and forming of the molten pool; a second gas channel is also provided on the main body, and the second gas channel is located above the first gas channel, and the plume suppression gas reaches the top of the molten pool through the second gas channel, blows away the plume generated during welding, reduces its scattering and absorption of the laser beam, and improves the utilization rate of the laser energy; the main body of the gas protection device is connected to the welding head through a connecting frame, to ensure that the gas protection device is synchronized with the welding operation, so that the gas protection always plays a role in the appropriate position during welding. The gas protection device introduces tail support gas, molten pool protection gas and plume suppression gas respectively through the first through hole, the first through groove, the first gas channel and the second gas channel on the main body, integrating multiple gas protection functions into one device, meeting the complexity of the requirements for multiple gas protections in the laser welding process, reducing the difficulty of operation, and improving work efficiency and welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 A cross-sectional view of a main body of a gas protection device provided by an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of a gas protection device provided in an embodiment of the present invention having a main body located on a welding workpiece;

[0027] Figure 3 A three-dimensional diagram of a gas protection device provided by an embodiment of the present invention;

[0028] Figure 4 An exploded view of a gas protection device provided in an embodiment of the present invention.

[0029] Reference numerals:

[0030] 1 is the main body, 110 is the first through groove, 120 is the first through hole, 130 is the first gas channel, 140 is the accommodating groove, 2 is the connecting frame, 210 is the first connecting block, 220 is the first rotating shaft, 230 is the second connecting block, 240 is the second rotating shaft, 250 is the second angle adjustment member, 251 is the second strip groove, 3 is the first ventilation component, 310 is the second through hole, 320 is the first air guide groove, 4 is the second ventilation component, 410 is the third through hole, 420 is the second air guide groove, 5 is the first angle adjustment member, 510 is the first strip groove, 6 is the air knife, 620 is the air distribution plate, 630 is the second mesh plate, 7 is the first mesh plate, 8 is the welding workpiece, 9 is the molten pool, 10 is the feather, and 11 is the first threaded hole. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] 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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0034] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 the present invention can be understood according to specific circumstances.

[0036] See also Figure 1 The information board for vehicle convergence provided by the embodiment of the present invention includes: a connecting frame 2 and a main body 1, wherein the connecting frame 2 is used to install the welding head; the main body 1 is arranged on the connecting frame 2 and has a first surface and a second surface relative to each other, and a first through groove 110 is provided on the first surface of the main body 1, and the first through groove 110 is used to cover the weld of the welding workpiece 8; the main body 1 is provided with a first through hole 120, and the first through hole 120 is connected to the first through groove 110, and is used to introduce tail support gas into the first through groove 110; the main body 1 is provided with a first gas channel 130, the first gas channel 130 passes through the first surface and the second surface, and the extension line of the axis of the first gas channel 130 intersects with the first surface, and the first gas channel 130 is used to introduce molten pool 9 protective gas to the molten pool 9; the main body 1 is provided with a second gas channel, and the second gas channel is located above the first gas channel 130, and the second gas channel is used to introduce Yuhui 10 suppression gas above the molten pool 9 of the welding workpiece 8.

[0037] In specific implementation: compared with the prior art that uses multiple gas protection devices to perform gas protection during welding, when using the gas protection device provided by the present invention to perform gas protection during welding, the body 1 is set on the welding workpiece 8, so that the first through groove 110 on the first surface covers the weld of the welding workpiece 8, and the tail support gas enters the first through groove 110 through the first through hole 120 on the body 1, providing a stable gas environment for the weld area from the start to the end of welding; the first gas channel 130 is aligned with the position of the molten pool 9 at a certain angle, and the molten pool 9 protective gas is introduced into the first gas channel 130. , the gas effectively isolates oxygen in the air, prevents oxidation of the molten pool 9 and assists in cooling and forming the molten pool 9; a second gas channel is also provided on the main body 1, and the second gas channel is located above the first gas channel 130. The plume 10 inhibits the gas from passing through the second gas channel to reach the top of the molten pool 9, blows away the plume 10 generated during welding, reduces its scattering and absorption of the laser beam, and improves the utilization rate of laser energy; the main body 1 of the gas protection device is connected to the welding head through the connecting frame 2 to ensure that the gas protection device is synchronized with the welding operation, so that the gas protection always plays a role in the appropriate position during welding. The gas protection device introduces the tail support gas, the molten pool 9 protection gas and the plume 10 inhibition gas respectively through the first through hole 120, the first through groove 110, the first gas channel 130 and the second gas channel on the main body 1, integrates multiple gas protection functions into one device, meets the complexity of the multiple gas protection requirements during laser welding, reduces the difficulty of operation, and improves work efficiency and welding quality.

[0038] As a possible implementation method, a receiving groove 140 is also provided on the second surface of the main body 1, and the receiving groove 140 has three side walls. The opening direction of the receiving groove 140 and the outlet direction of the first gas channel 130 are located on the same side of the main body 1. The gas protection device also includes a first ventilation component 3, and the first ventilation component 3 is fixedly arranged in the receiving groove 140. The first ventilation component 3 is provided with a second through hole 310, and the second through hole 310 is used to pass the feather 10 suppression gas. A first air guide groove 320 is provided on the surface of the first ventilation component 3 that contacts the receiving groove 140, and the contact surface of the first air guide groove 320 and the receiving groove 140 forms a first cavity. The second gas channel includes a first cavity and a second through hole 310. The first cavity is connected to the second through hole 310, and the first cavity is used to guide the gas to flow to above the molten pool 9. There is a semi-enclosed space structure in the accommodating groove 140, that is, the opening direction of the accommodating groove 140 has a specific directionality, and the three side walls of the accommodating groove 140 are in close contact with the first ventilation component 3, providing a basis for the installation and fixation of the first ventilation component 3.

[0039] The working principle is: the high-speed plume 10 suppresses gas from entering the second through hole 310 from the external supply source, and then passes through the first gas guide groove 320 connected to the second through hole 310. The first gas guide groove 320 plays a role in gas transmission, guiding the high-speed plume 10 suppression gas to a specific position, that is, guiding it to above the molten pool 9, and quickly blowing away the plume 10 generated during the welding process.

[0040] The beneficial effect of such a setting is: through the design of a special second gas channel, it is ensured that the high-speed plume 10 suppression gas can be accurately delivered to the top of the welding area, effectively controlling the plume 10, reducing its scattering and absorption of the laser beam, thereby improving the utilization rate of the laser energy. And the contact surface of the first gas guide groove 320 and the receiving groove 140 encloses the first cavity. Such a structure is compact and reasonable. The channel for suppressing the high-speed plume 10 gas is designed to include a first cavity and a second through hole 310. The contact surface between the first ventilation component 3 and the body 1 and the space of the first ventilation component 3 itself are fully utilized to ensure that the plume 10 suppression gas can be accurately delivered to the top of the molten pool 9. This design makes the structure of the gas protection device more compact, reduces space occupancy, and is easy to install and use. The connected first cavity and second through hole 310 ensure the smooth flow of gas, avoid blockage and instability during gas transmission, and improve the reliability of the device.

[0041] Furthermore, the main body 1 is also provided with a third gas channel, which is located above the second gas channel. The third gas channel is used to introduce the plume 10 suppression gas above the molten pool 9 of the welding workpiece 8.

[0042] By introducing the plume 10 suppression gas into the third gas channel, it is possible to form superimposed gas barriers within different height and width ranges, thereby achieving a better plume 10 suppression effect.

[0043] Furthermore, the gas protection device also includes a second ventilation component 4, which is fixed on the main body 1. A third through hole 410 is opened on the second ventilation component 4, and the third through hole 410 is used to pass the feather 10 suppression gas. A second air guide groove 420 is opened on the surface of the second ventilation component 4 that contacts the main body 1. The contact surface of the second air guide groove 420 and the main body 1 forms a second cavity. The third gas channel includes the second cavity and the third through hole 410. The second cavity is connected with the third through hole 410. The second air guide groove 420 is located above the first air guide groove 320, and the groove width of the second air guide groove 420 is greater than the groove width of the first air guide groove 320. The second cavity is used to guide the gas to flow above the molten pool 9.

[0044] During specific implementation: the second ventilation component 4 is fixed to the main body 1, which can be achieved by bolt connection, welding, etc., to ensure that the second ventilation component 4 and the main body 1 maintain a relatively stable positional relationship during operation. The position of the second ventilation component 4 is above the first ventilation component 3. Specifically, the second air guide groove 420 on the second ventilation component 4 is located above the first air guide groove 320 on the first ventilation component 3. This upper and lower positional relationship enables the plume 10 suppression gas flowing out of the two air guide grooves to cover and protect the area above the molten pool 9 at different heights. A third through hole 410 is provided on the second ventilation component 4, which is used to pass the plume 10 suppression gas. The third through hole 410 is connected to an external plume 10 suppression gas supply source, so that the gas can smoothly enter the second ventilation component 4. At the same time, the surface where the second air guide groove 420 contacts the main body 1 forms a second cavity, and the second cavity is connected to the third through hole 410, ensuring that the gas can flow from the third through hole 410 into the second air guide groove 420.

[0045] It should be noted that the second air guide groove 420 is above the first air guide groove 320, and the groove width of the second air guide groove 420 is greater than the groove width of the first air guide groove 320. The plume 10 suppression gas flowing out of these two air guide grooves can form a superimposed gas barrier within different height and width ranges. High-speed plume 10 suppression gas is introduced into the first air guide groove 320, and relatively low-speed plume 10 suppression gas is introduced into the second air guide groove 420. In this way, the high-speed plume 10 suppression gas at the bottom can quickly blow away the plume 10, and the relatively wide plume 10 suppression gas at the top can further blow away the plume 10 and limit the height of the plume 10 gas. Thereby achieving a better plume 10 suppression effect.

[0046] The working principle is as follows: the plume 10 suppresses gas from entering the third through hole 410 of the second ventilation member 4 from the external supply source. Then, the gas passes through the second gas guide groove 420 connected to the third through hole 410. The second gas guide groove 420 guides the gas flow and guides the plume 10 suppressing gas to a specific area above the molten pool 9.

[0047] The beneficial effects of such a setting are: the special design of the second ventilation component 4 and the second cavity provides an additional source of plume 10 suppression gas above the molten pool 9, and the cooperation with the first ventilation component 3 can more effectively suppress the plume 10, reduce its scattering and absorption of the laser beam, and improve the utilization rate of the laser energy. And the design of the gas guide grooves of different heights and widths enables the plume 10 suppression gas to form an effective gas barrier in a larger range, improving the effect and stability of the plume 10 suppression. The position and shape of the second ventilation component 4 and the first ventilation component 3 can be adjusted according to actual needs to optimize the gas flow and the plume 10 suppression effect. And the third through hole 410 is arranged on the second ventilation component 4 to facilitate connection with an external gas supply source, while also reducing the risk of gas leakage and improving the reliability of the device. The wide plume 10 suppression gas introduced into the third gas channel works in coordination with other gas channels (such as the tail support gas and the molten pool 9 protection gas introduced into the first gas channel 130, the high-speed plume 10 suppression gas introduced into the second gas channel, etc.). The wide plume 10 suppression gas flows out from a specific location and forms a protection for the welding area together with other gases. The wide plume 10 suppression gas and the high-speed plume 10 suppression gas are blown into the welding area from different heights to form a superimposed gas barrier to effectively control the plume 10.

[0048] It should be noted that the design of the two air guide grooves, the first air guide groove 320 and the second air guide groove 420, is only for better control of Yuhui 10. The number of the air guide grooves is not limited here, that is, the number of the air guide grooves can be three, four, etc.

[0049] As a possible implementation method, the gas protection device also includes: a first angle adjustment member 5, the first angle adjustment member 5 is fixedly arranged on the second surface of the main body 1, the first angle adjustment member 5 is rotatably connected to the connecting frame 2, and the rotation axis of the first angle adjustment member 5 is parallel to the first surface of the main body 1.

[0050] In specific implementation: through the rotational connection between the connecting frame 2 and the first angle adjustment member 5, the angle adjustment of the connecting frame 2 and the welding head and other components installed on the connecting frame 2 can be achieved. According to the actual welding requirements, the angle relationship between the welding head and the welding workpiece 8 is adjusted to obtain the best welding effect. When it is necessary to adjust the angle of the gas protection device, the operator can rotate the gas protection device body 1 so that the gas protection device body 1 can be rotated relative to the welding head through the first angle adjustment member 5. In this way, the angle between the welding head fixed at the other end of the connecting frame 2 and the body 1 can be adjusted according to the actual welding requirements, thereby achieving the adjustment of the overall angle of the gas protection device.

[0051] The beneficial effect of such a setting is that when welding, different welding workpieces 8 may have different shapes and angles. By adjusting the first angle adjustment member 5, the gas protection device can be adapted to various complex welding scenarios. Whether it is flat welding, curved surface welding or welding at an inclined angle, the angle can be adjusted by the first angle adjustment member 5 to ensure that the gas protection device can effectively cover the welding area and improve the effect of the protective gas. In addition, the angle can be flexibly adjusted for different welding processes to optimize the flow direction and coverage of the gas to meet the gas protection requirements under various welding conditions. At the same time, the design of the first angle adjustment member 5 makes the angle adjustment simple and quick. The operator does not need to use complex tools or perform tedious disassembly and installation processes. The angle can be adjusted by manually rotating the gas protection device body 1, which greatly improves work efficiency and reduces operation time and labor intensity.

[0052] Furthermore, the connecting frame 2 includes: a first connecting block 210 and a first rotating shaft, the first connecting block 210 is rotatably connected to the first angle adjustment member 5, and the first connecting block 210 rotates around the first angle adjustment member 5 as the rotating axis; the first rotating shaft is rotatably connected to the first connecting block 210, the rotating axis of the first rotating shaft is perpendicular to the rotating axis of the first angle adjustment member 5, and the welding head is fixedly arranged at one end of the first rotating shaft.

[0053] Such a setting realizes multi-angle adjustment. The rotational connection between the first connecting block 210 and the first angle adjustment member 5 realizes angle adjustment in one dimension, which can adjust the angle of the connecting frame 2 as a whole relative to the body 1; the rotational connection between the first rotating shaft and the first connecting block 210 provides angle adjustment in another direction in the second dimension. Since the two dimensions of rotation are perpendicular to each other, the rotation in these two directions can realize multi-angle adjustment of the welding joint in three-dimensional space. Through the cooperation of these two rotational connections, the welding head can be accurately adjusted to the optimal welding position and angle according to different welding requirements. The adaptability of the entire device is enhanced, and it can be applied to different types of welding tasks and working environments.

[0054] As a possible implementation method, at least two first threaded holes 11 are provided on the second surface of the main body 1, and the gas protection device also includes a first threaded connector. The first angle adjustment member 5 is provided with first strip-shaped grooves corresponding to the number of the first threaded holes 11, and the length direction of the first strip-shaped grooves is parallel to the rotation axis of the first angle adjustment member 5. The first threaded connector is connected to the first threaded hole 11 through the first strip-shaped grooves, so that the first angle adjustment member 5 is fixed to the second surface of the main body 1.

[0055] The beneficial effect of such arrangement is that the first angle adjustment member 5 is firmly fixed on the body 1 by the first threaded connection member passing through the first strip groove and being threadedly connected to the body 1. The first threaded connection member may be a bolt, and this fixing method is simple and reliable, and can ensure that the first angle adjustment member 5 will not loosen or shift during the welding process. The length direction of the first strip groove is parallel to the rotation axis of the first angle adjustment member 5 and the connecting frame 2, so that the position of the first angle adjustment member 5 can be adjusted within a certain range as needed during the installation process. Specifically, by moving the first threaded connection member in the first strip groove, the relative distance between the first angle adjustment member 5 and the body 1 can be changed, and then the distance between the body 1 and the welding head can be adjusted. Since the first angle adjustment member 5 is connected to the connecting frame 2, and the welding head is fixed at one end of the first rotating shaft of the connecting frame 2, when the relative distance between the first angle adjustment member 5 and the body 1 is adjusted, the distance between the connecting frame 2 and the welding head and the body 1 will be changed accordingly. Different relative distances between the welding head and the workpiece may be required in different welding tasks. For example, for some fine welding work, it may be necessary to bring the welding head closer to the workpiece to achieve higher precision; while for welding some large workpieces, it may be necessary to keep the welding head at a certain distance from the workpiece for easy operation. Through the adjustable design of the first strip groove, these different needs can be flexibly met, improving the versatility and adaptability of the gas protection device.

[0056] The first threaded connector passes through the first strip groove of the first angle adjustment member 5 and is connected to the first threaded hole 11 of the body 1. The first angle adjustment member 5 is firmly fixed to the body 1 through the bite of the thread. During the welding process, even if it is subjected to external forces such as vibration and impact, it can ensure that the first angle adjustment member 5 will not be easily displaced or fall off; at the same time, when it is necessary to adjust the angle of the gas protection device body 1, since the first angle adjustment member 5 is rotatably connected to the connecting frame 2, the operator can change the angle by rotating the connecting frame 2. The fixing effect of the screw can ensure that during the angle adjustment process, the relative position between the first angle adjustment member 5 and the body 1 remains stable and will not loosen due to changes in the angle.

[0057] And by fixing at least two first threaded connectors, that is, there can be two, three, or more first threaded connectors. In some welding processes that require high precision, more first threaded connectors and first threaded holes 11 can be selected to improve the stability and accuracy of the device, and in some welding scenarios that do not require high precision, the number of first threaded connectors can be reduced to simplify the structure of the device and reduce costs; such a setting provides a multi-point connection, which increases the stability and reliability of the connection. Compared with a single-point connection, a multi-point connection can better withstand external forces, prevent the first angle adjustment member 5 from loosening or displacement during use, and ensure the normal operation of the gas protection device. The connection method between the threaded connector and the threaded hole has a high tightening force, which can ensure the close connection between the first angle adjustment member 5 and the gas protection device body 1, and improve the structural strength of the entire device.

[0058] As a possible implementation method, the gas protection device also includes an air knife 6, which is fixedly connected to the connecting frame 2. The wind curtain formed by the air knife 6 is used to be set at the outlet of the second gas channel to suppress the diffusion of the feather 10.

[0059] In the gas protection device, the gas knife 6 is fixedly connected to the connecting frame 2. The connecting frame 2 is an intermediate component. On the one hand, it is connected to the main body 1 through the first angle adjustment member 5 and other structures, and on the other hand, it provides an installation position for the gas knife 6. The position of the gas knife 6 is determined to cover the outlet of the second gas channel to ensure that its wind curtain can play an effective role.

[0060] The beneficial effect of such a configuration is as follows: when the plume 10 is generated during welding, the wind curtain formed by the air knife 6 is arranged at the outlet of the second gas channel. The plume 10 is blocked by the wind curtain during the diffusion process, and its diffusion is suppressed. The wind curtain changes the movement direction of the plume 10 through the impact force of the high-speed airflow and the flow direction control of the airflow, making it difficult for it to diffuse to the surroundings. The air knife 6 works in coordination with the second gas channel and other gas channels on the main body 1. The second gas channel introduces plume 10 suppression gas above the molten pool 9 of the welding workpiece 8, and the wind curtain of the air knife 6 further enhances the suppression effect on the plume 10. The air knife 6 is fixedly connected to the connecting frame 2, which increases the structural stability of the entire gas protection device. During the welding process, the air knife 6 will not be displaced due to vibration or external force, ensuring that the wind curtain can always cover the correct position.

[0061] As a possible implementation, the connecting frame 2 also includes: a second connecting block 230, a second rotating shaft 240 and a second angle adjustment member 250, wherein the second connecting block 230 is rotatably connected to the first rotating shaft, and the first connecting block 210 rotates with the first angle adjustment member 5 as the rotating axis; the second rotating shaft 240 is rotatably connected to the second connecting block 230, and the rotation axis of the second rotating shaft 240 is respectively perpendicular to the rotation axis of the first angle adjustment member 5 and the rotation axis of the first rotating shaft; the second angle adjustment member 250 is rotatably connected to the second rotating shaft 240, and at least two second threaded holes are provided on the side wall of the gas knife 6. The gas protection device also includes a second threaded connection member, and a second strip groove 251 corresponding to the number of the second threaded holes is provided on the second angle adjustment member 250. The length direction of the second strip groove 251 is perpendicular to the rotation axis of the second rotating shaft 240. The second threaded connection member is connected to the second threaded hole through the second strip groove 251, so that the gas knife 6 is fixed on the second angle adjustment member 250.

[0062] The beneficial effect of such a setting is that the rotational connection between the second connecting block 230 and the first rotating shaft and the rotational connection between the second rotating shaft 240 and the second connecting block 230, together with the rotational connection between the second angle adjustment member 250 and the second rotating shaft 240, provide the gas knife 6 with the ability to rotate and adjust in multiple directions. This multi-angle rotation allows the gas knife 6 to flexibly adjust its position and angle in different working scenarios to better cover the outlet of the second gas channel and inhibit the diffusion of the feather 10. The design of the three rotating axes being perpendicular to each other enables the gas knife 6 to be precisely adjusted in position in three-dimensional space to adapt to various complex welding environments and workpiece shapes.

[0063] At the same time, the design of the second strip groove, that is, the length direction of the second strip groove 251 is perpendicular to the rotation axis of the second rotating shaft 240, and the second threaded connector passes through the second strip groove 251 and is threadedly connected to the air knife 6, thereby achieving the fixation of the air knife 6 on the second angle adjustment member 250. This fixing method can ensure the stability of the air knife 6 when necessary and prevent it from moving unnecessarily during operation. At the same time, the design of the second strip groove 251 also allows fine adjustment within a certain range to meet different installation and use requirements.

[0064] As a possible implementation, the gas protection device further includes a first mesh plate 7 , on which mesh holes are evenly arranged. The first mesh plate 7 is fixed to the first surface of the body 1 and covers the first through groove 110 .

[0065] The first mesh plate 7 is fixed on the first surface of the body 1 and covers the first through groove 110. Generally, welding, bolt connection or other suitable connection methods can be used to ensure that the connection between the first mesh plate 7 and the body 1 is firm and reliable. The beneficial effect of such a setting is that when the gas passes through the first through groove 110, the mesh holes evenly arranged on the first mesh plate 7 play a role in evenly distributing the gas. After the gas flows out of the first through groove 110, it passes through the mesh holes of the first mesh plate 7 and is dispersed into a more uniform airflow. In this way, the gas can be more evenly covered in the welding area, improving the effect of gas protection. Moreover, the presence of the first mesh plate 7 can also play a certain filtering and blocking role. It can prevent some larger particles or impurities from entering the welding area, reducing the impact on the welding quality. At the same time, the mesh plate can also slow down the flow rate of the gas to a certain extent, so that the gas flows more smoothly.

[0066] It should be noted that a mesh plate with uniform through holes is also provided at the opening of the first gas channel 130 (i.e., the outlet of the protective gas of the molten pool 9) or other gas channel openings. The function of the mesh plate is the same as that of the first mesh plate 7 mentioned above, which will not be repeated here.

[0067] It should be noted that an air distribution plate 620 and a second mesh plate 630 are provided in the air knife 6 , and mesh holes are evenly arranged on the second mesh plate 630 .

[0068] Inside the air knife 6, the gas distribution plate 620 and the second mesh plate 630 are installed at specific positions. The gas distribution plate 620 is usually located in the air flow channel inside the air knife 6, and is used to divide and regulate the gas entering the air knife 6. The second mesh plate 630 is also located in the air flow channel, generally close to the outlet of the air knife 6. The second mesh plate 630 is evenly provided with mesh holes, and the size and distribution of these mesh holes are carefully designed to meet specific air flow regulation requirements.

[0069] The beneficial effect of such a setting is that the gas distributor plate 620 diverts the gas entering the air knife 6 so that the gas can be more evenly distributed inside the air knife 6. By adjusting the shape, position and angle of the gas distributor plate 620, the flow direction and flow rate of the gas can be controlled, thereby adjusting the strength and width of the wind curtain generated by the air knife 6. The gas distributor plate 620 can also stabilize the airflow, reduce the fluctuation and turbulence of the airflow, and improve the stability and uniformity of the wind curtain. The uniform mesh holes on the second mesh plate 630 further adjust and refine the gas passing through the air knife 6. When the gas passes through the mesh holes, it will be dispersed into finer airflows, making the wind curtain more uniform and soft. The size and distribution of the mesh holes on the second mesh plate 630 can affect the speed and pressure distribution of the wind curtain. Smaller mesh holes can produce higher airflow speeds and pressures, which are suitable for occasions that require stronger wind curtains; larger mesh holes can produce lower airflow speeds and pressures, which are suitable for occasions that require softer wind curtains.

[0070] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0071] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A gas protection device, characterized in that: include: A connecting frame, the connecting frame is used to install the welding head; A main body, wherein the main body is arranged on the connecting frame, and the main body has a first surface and a second surface opposite to each other, a first through groove is provided on the first surface of the main body, and the first through groove is used to cover the weld of the welding workpiece; the main body is provided with the first through hole, and the first through hole is connected with the first through groove, and is used to introduce tail support gas into the first through groove; the main body is provided with a first gas channel, the first gas channel passes through the first surface and the second surface, and the extension line of the axis of the first gas channel intersects with the first surface, and the first gas channel is used to introduce molten pool protection gas into the molten pool of the welding workpiece; the main body is provided with a second gas channel, the second gas channel is located above the first gas channel, and the second gas channel is used to introduce feather glow suppression gas above the molten pool of the welding workpiece.

2. The gas protection device according to claim 1, characterized in that: A receiving groove is also provided on the second surface of the main body, and the receiving groove has three side walls. The opening direction of the receiving groove and the outlet direction of the first gas channel are located on the same side of the main body. The gas protection device also includes a first ventilation component, and the first ventilation component is fixedly arranged in the receiving groove. The first ventilation component is provided with a second through hole, and the second through hole is used to pass the feather suppression gas. A first gas guide groove is provided on the surface of the first ventilation component that contacts the receiving groove, and the contact surface of the first gas guide groove and the receiving groove forms a first cavity. The second gas channel includes the first cavity and the second through hole. The first cavity is connected to the second through hole, and the first cavity is used to guide the gas to flow above the molten pool.

3. The gas protection device according to claim 2, characterized in that: The main body is also provided with a third gas channel, and the third gas channel is located above the second gas channel. The third gas channel is used to introduce plume suppression gas above the molten pool of the welding workpiece.

4. The gas protection device according to claim 3, characterized in that: The gas protection device also includes a second ventilation component, which is fixed on the main body. A third through hole is provided on the second ventilation component, and the third through hole is used to pass the plume suppression gas. A second gas guide groove is provided on the surface of the second ventilation component that contacts the main body. The contact surface of the second gas guide groove and the main body forms a second cavity. The third gas channel includes the second cavity and the third through hole. The second cavity is connected to the third through hole. The second gas guide groove is located above the first gas guide groove, and the groove width of the second gas guide groove is greater than the groove width of the first gas guide groove. The second cavity is used to guide the gas to flow above the molten pool.

5. The gas protection device according to claim 1, characterized in that: The gas protection device also includes: A first angle adjustment member, wherein the first angle adjustment member is fixedly disposed on the second surface of the main body, the first angle adjustment member is rotatably connected to the connecting frame, and the rotation axis of the first angle adjustment member is parallel to the first surface of the main body.

6. The gas protection device according to claim 5, characterized in that: The connecting frame comprises: a first connecting block, wherein the first connecting block is rotatably connected to the first angle adjusting member, and the first connecting block rotates with the first angle adjusting member as a rotation axis; A first rotating shaft, wherein the first rotating shaft is rotatably connected to the first connecting block, a rotating axis of the first rotating shaft and a rotating axis of the first angle adjusting member are perpendicular to each other, and the welding head is fixedly arranged at one end of the first rotating shaft.

7. The gas protection device according to claim 5, characterized in that: At least two first threaded holes are provided on the second surface of the main body, and the gas protection device also includes a first threaded connector. The first angle adjustment member is provided with first strip grooves corresponding to the number of the first threaded holes, and the length direction of the first strip grooves is parallel to the rotation axis of the first angle adjustment member. The first threaded connector is connected to the first threaded hole through the first strip groove, so that the first angle adjustment member is fixed to the second surface of the main body.

8. The gas protection device according to claim 1, characterized in that: The gas protection device also includes an air knife, which is fixedly connected to the connecting frame. The wind curtain formed by the air knife is used to be arranged at the outlet of the second gas channel to suppress the diffusion of the plume.

9. The gas protection device according to claim 8, characterized in that: The connecting frame also includes: a second connecting block, the second connecting block being rotatably connected to the first rotating shaft, and the first connecting block rotating about the first angle adjusting member as a rotating shaft; a second rotating shaft, the second rotating shaft being rotatably connected to the second connecting block, and a rotation axis of the second rotating shaft being respectively perpendicular to a rotation axis of the first angle adjusting member and a rotation axis of the first rotating shaft; A second angle adjustment member, the second angle adjustment member is rotatably connected to the second rotating shaft, the side wall of the gas knife is provided with at least two second threaded holes, the gas protection device also includes a second threaded connection member, the second angle adjustment member is provided with second strip grooves corresponding to the number of the second threaded holes, the length direction of the second strip grooves is perpendicular to the rotation axis of the second rotating shaft, the second threaded connection member is connected to the second threaded hole through the second strip grooves, so that the gas knife is fixed on the second angle adjustment member.

10. The gas protection device according to claim 1, characterized in that: The gas protection device further includes a first mesh plate, on which mesh holes are arranged, and the first mesh plate is fixed to the first surface of the body and covers the first through groove.

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