Laser welding self-resetting shielding gas support

Abstract

The utility model relates to a laser welding self-resetting shielding gas support, and belongs to the field of welding machining. The laser welding self-resetting shielding gas support is used for conducting gas protection on peripheral weld joints of a ship heat exchanger. The laser welding self-resetting shielding gas support comprises a first mounting frame, a gas protection cover and an elastic piece. The first mounting frame is connected with the laser welding mechanism, is positioned at the downstream of the laser welding mechanism and is provided with a mounting end; the gas protective cover is rotatably arranged at the mounting end, the gas protective cover is provided with an opening side deviating from the first mounting frame, the opening side is a curved surface, and the curvature radius of the opening side is larger than that of the peripheral side of the ship heat exchanger; the elastic part is located between the mounting end and a welding gun of the laser welding mechanism in the first direction, the two ends of the elastic part are connected with the gas protective cover and the first mounting frame correspondingly, and the elastic part is configured to provide elastic force for the gas protective cover so as to drive the gas protective cover to rotate around the mounting end, so that the opening side can be attached to the peripheral side of the ship heat exchanger.

Description

Technical Field

[0001] This utility model belongs to the field of welding processing, and specifically relates to a self-resetting protective gas support for laser welding. Background Technology

[0002] Gas protection is the "lifeline" of welding quality for marine heat exchangers, directly determining the mechanical properties and corrosion resistance of the weld. Good gas protection during welding can extend the service life and reliability of heat exchangers in harsh marine environments, meeting the high standards required by the shipbuilding industry.

[0003] Therefore, improving the reliability of gas protection during welding is a technical problem that urgently needs to be solved in the welding of ship heat exchangers. Utility Model Content

[0004] In view of the above problems, this application provides a self-resetting protective gas support for laser welding, which can improve the reliability of gas protection during the welding process.

[0005] This application provides a self-resetting shielding gas support for laser welding to provide gas protection for the peripheral welds of a ship heat exchanger. The self-resetting laser welding support includes a first mounting bracket, a gas shield, and an elastic element. The first mounting bracket is connected to a laser welding mechanism and is located downstream of the laser welding mechanism. The first mounting bracket has a mounting end. The gas shield is rotatably disposed at the mounting end and has an open side facing away from the first mounting bracket. The open side is curved, and the radius of curvature of the open side is greater than the radius of curvature of the peripheral side of the ship heat exchanger. The elastic element is located between the mounting end and the welding torch of the laser welding mechanism along a first direction. The two ends of the elastic element are connected to the gas shield and the first mounting bracket, respectively. The elastic element is configured to provide an elastic force to the gas shield to drive the gas shield to rotate around the mounting end, so that the open side is attached to the peripheral side of the ship heat exchanger.

[0006] In the above technical solution, by setting the radius of curvature of the opening side to be larger than the radius of curvature of the periphery of the ship heat exchanger, the opening side can be better fitted onto the outside of the ship heat exchanger, and the opening side has two contact points with the outer periphery of the ship heat exchanger. At the same time, by placing an elastic element between the welding torch and the mounting component, the elastic element can drive the end of the gas shield near the welding torch to rotate towards the weld, so that the two contact points between the opening side and the outer periphery of the ship heat exchanger are closer to the welding torch. This allows the weld to be better protected by the gas shield after formation, and the gas shield can be adjusted according to the unevenness of the outer periphery of the ship heat exchanger, thereby improving the reliability of the gas shield's gas protection of the weld and thus improving the weld quality.

[0007] In some embodiments, the first mounting bracket includes a first mounting plate and a connecting rod. One end of the first mounting plate is connected to the laser welding mechanism; one end of the connecting rod is connected to the other end of the first mounting plate, and the other end extends in a direction parallel to the thickness of the first mounting plate, with the gas shield rotatably disposed at the other end of the connecting rod.

[0008] In the above technical solution, the first mounting plate and the first connecting rod enable the gas shield to be rotatably connected to the laser welding mechanism, which is simple in structure and easy to implement.

[0009] In some embodiments, the first mounting bracket further includes a first mounting base, the gas shield has a first side facing the first mounting plate, the first mounting base is adjustablely disposed on the first side along the first direction, and the other end of the connecting rod is rotatably disposed on the first mounting base.

[0010] In the above technical solution, by providing a first mounting base, on the one hand, the connecting rod is rotatably connected to the gas shield; on the other hand, the connection position between the connecting rod and the gas shield can be adjusted along a first direction. This allows the operator to easily adjust the connection position between the connecting rod and the gas shield according to actual usage conditions.

[0011] In some embodiments, the first mounting bracket further includes a first guide rod, the gas shield has a first side facing the first mounting plate, one end of the first guide rod is rotatably and slidably disposed on the first side along the first direction, a first guide hole is provided on the first mounting plate, the first guide hole penetrates the first mounting plate along the thickness direction of the first mounting plate, and the other end of the first guide rod passes through the first guide hole.

[0012] In the above technical solution, by setting the first guide rod and the first guide hole, the stability of the gas shield during rotation is improved, the reliability of the gas shield for gas protection of the weld is further improved, and thus the weld quality is further improved.

[0013] In some embodiments, the first mounting bracket further includes a second mounting base, which is slidably disposed on the first side along the first direction, and the other end of the first guide rod is rotatably disposed on the second mounting base; the elastic element is a first spring, which is sleeved on the first guide rod, and the two ends of the first spring abut against the second mounting base and the first mounting plate, respectively.

[0014] In the above technical solution, by setting a second mounting base, one end of the first guide rod can be rotatably connected to the gas shield while also moving in the first direction; at the same time, by setting the elastic element as a first spring and sleeve the first spring outside the first guide rod, the first guide rod can further restrict the deformation direction of the elastic element, thereby further improving the reliability of the gas shield for gas protection of the weld, and further improving the weld quality.

[0015] In some embodiments, the gas shield has a first end and a second end disposed opposite to each other in the first direction, and the first end, the elastic member, the mounting end and the second end are arranged sequentially along the first direction, with the first end partially recessed to form a receiving groove for avoiding the welding torch.

[0016] In the above technical solution, the first end is partially recessed to form a receiving groove for avoiding the welding torch, so that when the first end is driven by the elastic element to rotate closer to the weld, the receiving groove can avoid the welding torch and reduce the risk of interference between the welding torch and the gas shield.

[0017] In some embodiments, the laser welding self-resetting protective gas support further includes a water-cooling component disposed on the gas shield and used to regulate the temperature of the gas shield.

[0018] In the above technical solution, by setting up water-cooling components to regulate the temperature of the gas shield, the risk of the gas shield being damaged due to excessive temperature is reduced, and the reliability of the laser welding self-resetting protective gas support is improved.

[0019] In some embodiments, the laser welding self-resetting protective gas support further includes a second mounting bracket and an auxiliary wheel. The second mounting bracket is connected to the laser welding mechanism and is located upstream of the laser welding mechanism; the auxiliary wheel is used to abut against the circumference of the ship heat exchanger and is elastically connected to the second mounting bracket.

[0020] In the above technical solution, by setting up auxiliary wheels to guide the welding torch when the laser welding mechanism moves around the ship's heat exchanger, the stability of the welding torch during its movement is improved.

[0021] In some embodiments, the second mounting bracket includes a second mounting plate, a second guide rod, and a second spring. One end of the second mounting plate is connected to the laser welding mechanism; one end of the second guide rod is connected to the second mounting plate, and a second guide hole is provided on the mounting base of the auxiliary wheel, with the other end of the second guide rod passing through the second guide hole; the second spring is sleeved on the second guide rod, and both ends of the second spring are connected to the second mounting plate and the mounting base of the auxiliary wheel, respectively.

[0022] In the above technical solution, by setting a second spring and a second guide rod, the auxiliary wheel can be adjusted according to the concave and convex changes on the outer periphery of the ship's heat exchanger, thereby further improving the stability of the welding torch during its movement.

[0023] In some embodiments, the laser welding self-resetting protective gas support also includes a weld seam tracking device connected to the laser welding mechanism and located upstream of the second mounting bracket. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a ship's heat exchanger.

[0026] Figure 2 This is a schematic diagram of the structure of the laser welding self-resetting protective gas support provided in an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the structure of a portion of the laser welding self-resetting protective gas support provided in an embodiment of this utility model;

[0028] Figure 4 A schematic diagram of the structure of a portion of the laser welding self-resetting protective gas support provided in an embodiment of this utility model from another perspective. Detailed Implementation

[0029] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0030] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] Laser welding technology is widely used in heat exchangers in the shipbuilding industry. (Refer to...) Figure 1 During the welding process of ship heat exchangers, multiple layers of heat exchanger plates need to be stacked and welded together. In actual production, due to the machining of parts and the assembly error after a large number of stacks, there are misalignments within 0.2mm after the heat exchanger plates are clamped. As a result, the weld seams on the periphery of the ship heat exchanger are not on the standard circumference during the welding process. Under these circumstances, it is difficult for the fixed gas shield to make good contact with every weld seam, resulting in poor gas protection for some weld seams. This affects the mechanical properties and corrosion resistance of the weld seams, and consequently affects the service life and reliability of the ship heat exchanger.

[0034] To solve the above technical problems, refer to Figures 2-4 This application provides a laser welding self-resetting protective gas support for gas protection of the peripheral weld of a ship heat exchanger 300. The laser welding self-resetting includes a first mounting bracket 10, a gas protective cover 20 and an elastic element 30. The first mounting bracket 10 is connected to the laser welding machine 200 and is located downstream of the laser welding machine 200. The first mounting bracket 10 has a mounting end. The gas shield 20 is rotatably mounted on the mounting end. The gas shield 20 has an opening side 21 facing away from the first mounting bracket 10. The opening side 21 is a curved surface, and the radius of curvature of the opening side 21 is greater than the radius of curvature of the periphery of the ship heat exchanger 300. The elastic member 30 is located between the mounting end and the welding torch 210 of the laser welding machine 200 along the first direction X. The two ends of the elastic member 30 are connected to the gas shield 20 and the first mounting bracket 10, respectively. The elastic member 30 is configured to provide elastic force to the gas shield 20 to drive the gas shield 20 to rotate around the mounting end, so that the opening side 21 is attached to the periphery of the ship heat exchanger 300.

[0035] The first mounting bracket 10 is located downstream of the laser welding machine 200, which can be understood as being located behind the laser welding machine 200 relative to the ship heat exchanger 300, along the direction of movement of the laser welding machine 200.

[0036] The gas shield 20 is a shell-like structure for containing protective gas, and has an internal cavity. The opening side 21 is the side of the gas shield 20 with an opening to discharge the protective gas and protect the weld. Exemplarily, the gas shield 20 is provided with a connector for the protective gas to enter its interior.

[0037] In some embodiments, a portion of the opening side 21 is recessed to form a relief groove 222 for avoiding weld seams.

[0038] The first direction X can be the length direction of the gas shield 20.

[0039] In this technical solution, by setting the radius of curvature of the opening side 21 to be greater than the radius of curvature of the periphery of the ship heat exchanger 300, the opening side 21 can be better fitted onto the outside of the ship heat exchanger 300, and the opening side 21 and the outer periphery of the ship heat exchanger 300 have two contact points. At the same time, by placing the elastic element 30 between the welding torch 210 and the mounting part, the elastic element 30 can drive the end of the gas shield 20 near the welding torch 210 to rotate towards the weld, so that the two contact points of the opening side 21 and the outer periphery of the ship heat exchanger 300 are closer to the welding torch 210. This allows the weld to be better protected by the gas shield 20 after it is formed, and the gas shield 20 can be adjusted according to the concavity and convexity of the outer periphery of the ship heat exchanger 300, thereby improving the reliability of the gas shield 20 in protecting the weld and thus improving the weld quality.

[0040] According to some embodiments of this application, the first mounting bracket 10 includes a first mounting plate 11 and a connecting rod 12. One end of the first mounting plate 11 is connected to the laser welding machine 200; one end of the connecting rod 12 is connected to the other end of the first mounting plate 11, and the other end extends in a direction parallel to the thickness of the first mounting plate 11. A gas shield 20 is rotatably disposed at the other end of the connecting rod 12.

[0041] In this technical solution, the first mounting plate 11 and the first connecting rod 12 enable the gas shield 20 to be rotatably connected to the laser welding machine 200, which is simple in structure and easy to implement.

[0042] According to some embodiments of this application, the first mounting bracket 10 further includes a first mounting base 13, the gas shield 20 has a first side facing the first mounting plate 11, the first mounting base 13 is adjustablely disposed on the first side along the first direction X, and the other end of the connecting rod 12 is rotatably disposed on the first mounting base 13.

[0043] For example, a slide rail 20A is provided on the first side, and a first mounting base 13 is adjustablely disposed on the slide rail 20A along the first direction X.

[0044] In some embodiments, the slide rail 20A is a dovetail groove, and a portion of the first mounting base 13 is disposed within the dovetail groove and is interference-fitted with the dovetail groove. This allows the first mounting base 13 to be adjusted along the extension direction of the dovetail groove (i.e., the first direction X) on the slide rail 20A.

[0045] In this technical solution, by providing a first mounting base 13, on the one hand, the connecting rod 12 is rotatably connected to the gas shield 20; on the other hand, the connection position between the connecting rod 12 and the gas shield 20 can be adjusted along the first direction X. This allows the operator to easily adjust the connection position between the connecting rod 12 and the gas shield 20 according to actual usage.

[0046] According to some embodiments of this application, the first mounting bracket 10 further includes a first guide rod 14, the gas shield 20 has a first side facing the first mounting plate 11, one end of the first guide rod 14 is rotatably and slidably disposed on the first side along the first direction X, the first mounting plate 11 is provided with a first guide hole, the first guide hole penetrates the first mounting plate 11 along the thickness direction of the first mounting plate 11, and the other end of the first guide rod 14 passes through the first guide hole.

[0047] In this technical solution, by setting the first guide rod 14 and the first guide hole, the stability of the gas shield 20 when rotating is improved, the reliability of the gas shield 20 in protecting the weld is further improved, and thus the weld quality is further improved.

[0048] According to some embodiments of this application, the first mounting bracket 10 further includes a second mounting base 15, which is slidably disposed on the first side along the first direction X, and the other end of the first guide rod 14 is rotatably disposed on the second mounting base 15; the elastic element 30 is a first spring 31, which is sleeved on the first guide rod 14, and the two ends of the first spring 31 abut against the second mounting base 15 and the first mounting plate 11 respectively.

[0049] In some embodiments, the slide rail 20A is a dovetail groove, and a portion of the second mounting base 15 is disposed within the dovetail groove and can slide freely relative to the dovetail groove.

[0050] In this technical solution, by setting a second mounting base 15, one end of the first guide rod 14 is rotatably connected to the gas shield 20, and can also move along the first direction X. At the same time, by setting the elastic element 30 as the first spring 31 and sleeve the first spring 31 outside the first guide rod 14, the first guide rod 14 can further restrict the deformation direction of the elastic element 30, thereby further improving the reliability of the gas shield 20 in gas protection of the weld, and further improving the weld quality.

[0051] According to some embodiments of this application, the gas shield 20 has a first end 22 and a second end 23 disposed opposite to each other in the first direction X. The first end 22, the elastic member 30, the mounting end and the second end 23 are arranged sequentially along the first direction X. The first end 22 is partially recessed to form a receiving groove 221 for avoiding the welding torch 210.

[0052] In this technical solution, the first end 22 is partially recessed to form a receiving groove 221 for avoiding the welding torch 210, so that when the first end 22 is driven by the elastic member 30 to rotate closer to the weld, the receiving groove 221 can avoid the welding torch 210 and reduce the risk of interference between the welding torch 210 and the gas shield 20.

[0053] According to some embodiments of this application, the laser welding self-resetting protective gas support also includes a water-cooling component 70, which is disposed on the gas shield 20 and used to regulate the temperature of the gas shield 20.

[0054] In some embodiments, the water-cooled component 70 is attached to the outer surface of the gas shield 20.

[0055] In this technical solution, by setting up a water-cooling component 70 to regulate the temperature of the gas shield 20, the risk of the gas shield 20 being damaged due to excessive temperature is reduced, and the reliability of the laser welding self-resetting protective gas support is improved.

[0056] According to some embodiments of this application, the laser welding self-resetting protective gas support further includes a second mounting bracket 40 and an auxiliary wheel 50. The second mounting bracket 40 is connected to the laser welding machine 200 and is located upstream of the laser welding machine 200; the auxiliary wheel 50 is used to abut against the circumference of the ship heat exchanger 300 and is elastically connected to the second mounting bracket 40.

[0057] In this technical solution, by setting an auxiliary wheel 50 to guide the welding torch 210 when the laser welding machine 200 moves around the ship heat exchanger 300, the stability of the welding torch 210 during its movement is improved.

[0058] According to some embodiments of this application, the second mounting bracket 40 includes a second mounting plate 41, a second guide rod 42, and a second spring 43. One end of the second mounting plate 41 is connected to the laser welding machine 200; one end of the second guide rod 42 is connected to the second mounting plate 41, and a second guide hole is provided on the mounting seat of the auxiliary wheel 50, with the other end of the second guide rod 42 passing through the second guide hole; the second spring 43 is sleeved on the second guide rod 42, and both ends of the second spring 43 are connected to the second mounting plate 41 and the mounting seat of the auxiliary wheel 50, respectively.

[0059] In this technical solution, by setting a second spring 43 and a second guide rod 42, the auxiliary wheel 50 can be adjusted according to the concave and convex changes on the outer periphery of the ship heat exchanger 300, thereby further improving the stability of the welding torch 210 during its movement.

[0060] According to some embodiments of this application, the laser welding self-resetting protective gas support also includes a weld seam tracking device 60, which is connected to the laser welding machine 200 and located upstream of the second mounting bracket 40.

[0061] The weld seam tracking device 60 is an intelligent device for automatically detecting and tracking the position of weld seams, and is widely used in automated welding systems. Its core function is to identify the geometric features of the weld seam in real time through sensors and guide the welding torch 210 to move precisely along a predetermined path, thereby improving welding quality and efficiency.

[0062] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0063] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A laser welded self-resetting shielded gas bracket for use in gas shielding of circumferential welds of a marine heat exchanger, characterized in that The laser welding self-resetting protective gas support includes: A first mounting bracket is connected to the laser welding mechanism and located downstream of the laser welding mechanism, and the first mounting bracket has a mounting end; A gas shield is rotatably mounted on the mounting end. The gas shield has an opening side facing away from the first mounting frame. The opening side is a curved surface, and the radius of curvature of the opening side is greater than the radius of curvature of the circumference of the ship heat exchanger. An elastic element, along a first direction, is located between the mounting end and the welding torch of the laser welding mechanism. Both ends of the elastic element are connected to the gas shield and the first mounting bracket, respectively. The elastic element is configured to provide elastic force to the gas shield to drive the gas shield to rotate around the mounting end, so that the opening side is attached to the periphery of the ship heat exchanger.

2. The laser-welded self-resetting shield support of claim 1, wherein, The first mounting bracket includes: The first mounting plate is connected at one end to the laser welding mechanism; A connecting rod is connected at one end to the other end of the first mounting plate, and the other end extends in a direction parallel to the thickness of the first mounting plate. The gas shield is rotatably disposed at the other end of the connecting rod.

3. The laser welded self-resetting shroud according to claim 2, wherein, The first mounting bracket also includes: The first mounting base, wherein the gas shield has a first side facing the first mounting plate, the first mounting base is adjustablely disposed on the first side along the first direction, and the other end of the connecting rod is rotatably disposed on the first mounting base.

4. The laser welded self-resetting shroud according to claim 2, wherein, The first mounting bracket also includes: The first guide rod, the gas shield has a first side facing the first mounting plate, one end of the first guide rod is rotatable and slidable along the first direction and is disposed on the first side, the first mounting plate is provided with a first guide hole, the first guide hole penetrates the first mounting plate along the thickness direction of the first mounting plate, and the other end of the first guide rod passes through the first guide hole.

5. The laser welding self-resetting protective gas support according to claim 4, characterized in that, The first mounting bracket also includes: The second mounting base is slidably disposed on the first side along the first direction, and the other end of the first guide rod is rotatably disposed on the second mounting base; The elastic element is a first spring, which is sleeved on the outside of the first guide rod, and the two ends of the first spring abut against the second mounting base and the first mounting plate, respectively.

6. The laser welding self-resetting protective gas support according to claim 1, characterized in that, The gas shield has a first end and a second end that are disposed opposite to each other in the first direction. The first end, the elastic element, the mounting end and the second end are arranged in sequence along the first direction. The first end is partially recessed to form a receiving groove for avoiding the welding torch.

7. The laser welding self-resetting protective gas support according to claim 1, characterized in that, The laser welding self-resetting protective gas support also includes: A water-cooled component is disposed on the gas shield and is used to regulate the temperature of the gas shield.

8. The laser welding self-resetting protective gas support according to any one of claims 1-7, characterized in that, The self-resetting protective gas support for laser welding also includes: The second mounting bracket is connected to the laser welding mechanism and is located upstream of the laser welding mechanism; The auxiliary wheel is used to abut against the periphery of the ship's heat exchanger and is elastically connected to the second mounting bracket.

9. The laser welding self-resetting protective gas support according to claim 8, characterized in that, The second mounting bracket includes: The second mounting plate is connected at one end to the laser welding mechanism; The second guide rod has one end connected to the second mounting plate, and the mounting base of the auxiliary wheel has a second guide hole, with the other end of the second guide rod passing through the second guide hole; The second spring is sleeved on the outside of the second guide rod, and the two ends of the second spring are respectively connected to the second mounting plate and the mounting base of the auxiliary wheel.

10. The laser welding self-resetting protective gas support according to claim 8, characterized in that, The self-resetting protective gas support for laser welding also includes: A weld seam tracking device is connected to the laser welding mechanism and is located upstream of the second mounting bracket.

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