Butt joint device and method for titanium alloy laser welding

Abstract

The invention discloses a butt joint device and method for titanium alloy laser welding, and the butt joint device comprises a first magnetic ball body which has magnetism and is located in a flow guide pipe; the second magnetic ball body has magnetism and is positioned outside the corrugated pipe blank; wherein the first magnetic sphere and the second magnetic sphere magnetically attract each other, the first magnetic sphere clings to the inner wall of the flow guide pipe and the second magnetic sphere clings to the outer wall of the corrugated pipe blank by means of magnetic attraction, and a first contact point and a second contact point are respectively formed. The two magnetic balls inside and outside the flow guide pipe and the corrugated pipe blank attract each other, pressure is applied to the inner wall of the flow guide pipe and the outer wall of the corrugated pipe blank from two opposite directions at the same time, so that the position between the flow guide pipe and the corrugated pipe blank is stable, and in addition, active adjustment can be conducted through rolling performance of the outer surfaces of the magnetic balls; the first abutting point and the second abutting point are made to be close to the welding seam position between the flow guide pipe and the corrugated pipe blank, and welding stability is better guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of positioning of welded workpieces, and particularly to a titanium alloy laser welding butt joint device and method thereof. Background Art

[0002] The existing bellows compensator made of titanium alloy materials includes a bellows blank, flanges located at both ends of the bellows blank, and a flow guide pipe located inside the bellows blank. The bellows compensator belongs to a compensating element, which utilizes the effective telescopic deformation of its working main body, the bellows, to absorb the dimensional changes of pipelines, conduits, containers, etc. caused by thermal expansion and contraction, or to compensate for the axial, lateral, and angular displacements of pipelines, conduits, containers, etc., and can also be used for noise reduction and vibration damping, and is widely used in modern industry.

[0003] One end of the flow guide pipe in the bellows compensator is welded to the bellows blank, and the other end is a free end, which can play a guiding role in the telescopic movement of the bellows blank and prevent the bellows compensator from becoming unstable. Due to the effective telescopic deformation of the bellows blank itself, before welding the flow guide pipe to the bellows blank, the flange is first fixedly connected to the bellows blank, and then a three-jaw or four-jaw chuck is used to apply pressure to the flow guide pipe from the inside to make it stable on the inner wall of the flange. For example, in a metal bellows compensator automatic welding device and its welding method with the publication number CN118357659A, a four-jaw chuck is used for stabilization and then welding, and then a laser is used to weld the flow guide pipe to the inner wall of the bellows blank to form a weld. Theoretically, the length of the flow guide pipe is mainly set to prevent the fluid from impacting the corrugated section of the bellows blank. However, due to the particularity of the bellows blank itself, a three-jaw or four-jaw chuck cannot be directly used to fix and weld the flow guide pipe to the bellows blank, so the length of the flow guide pipe needs to be increased to reach or approach the flange. Summary of the Invention

[0004] The object of the present invention is to provide a titanium alloy laser welding butt joint device and method thereof, which directly restricts the flow guide pipe and the bellows blank by using a butt joint device for the problem of the increased length of the flow guide pipe due to the requirement of welding stability.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A titanium alloy laser welding butt joint device includes:

[0007] A first magnetic sphere, having magnetism, located inside the flow guide pipe;

[0008] A second magnetic sphere, having magnetism, located outside the bellows blank;

[0009] Among them, the first magnetic sphere and the second magnetic sphere are magnetically attracted to each other. By relying on the magnetic attraction force, the first magnetic sphere is closely attached to the inner wall of the diversion tube and the second magnetic sphere is closely attached to the outer wall of the corrugated tube blank, respectively forming a first contact point and a second contact point. The straight-line distance between the first contact point and the second contact point is the sum of the thicknesses of the diversion tube and the corrugated tube blank.

[0010] Preferably, both the first magnetic sphere and the second magnetic sphere are wrapped by kits, with parts of the first magnetic sphere and the second magnetic sphere exposed. The kit wrapping the first magnetic sphere is fixedly connected with an inner sliding plate, and the kit wrapping the second magnetic sphere is fixedly connected with an outer sliding plate. The sliding trajectories of the inner sliding plate and the outer sliding plate are on a horizontal plane.

[0011] Preferably, the docking device further includes a first ring body and a second ring body. The first ring body is provided with a groove adapted to the inner sliding plate, and the inner sliding plate is slidably connected to the first ring body. The second ring body is provided with a groove adapted to the outer sliding plate, and the outer sliding plate is slidably connected to the second ring body. The stable diversion tube and the corrugated tube blank are located between the first ring body and the second ring body.

[0012] Preferably, the docking device further includes a bottom plate and a docking plate. The docking plate and the bottom plate are arranged vertically. The outer edges of the docking plate and the bottom plate are fixedly connected with ear structures. A hydraulic cylinder is installed on the ear structure of the bottom plate, and the output shaft of the hydraulic cylinder is fixedly connected with the ear structure on the docking plate. The hydraulic cylinder is used to control the distance between the docking plate and the bottom plate.

[0013] Preferably, a cylinder and a round rod are coaxially and fixedly connected to the center of the bottom plate. The round rod is located inside the cylinder. One end of the inner sliding plate away from the first magnetic sphere is connected with a wire. The wire passes through the cylinder and extends inward and is fixedly connected to the outer wall of the round rod. A handle is arranged at the top of the round rod, and the round rod is rotated by manipulating the handle to wind up the wire.

[0014] Preferably, a vertical rod is vertically and slidably connected to the second ring body. A base is arranged at the bottom of the vertical rod. A roller is rotatably connected to the base. The roller is placed on the docking plate. The base is fixedly connected with an installation box. The installation box is provided with a small motor. The output shaft of the small motor is fixedly connected to the roller shaft of the roller to drive the active rotation of the roller.

[0015] A method for butt welding of titanium alloy by laser, using a titanium alloy laser welding docking device, includes the following steps:

[0016] Apply pressure to the inner wall of the diversion tube and the outer wall of the corrugated tube blank simultaneously from both inside and outside directions by using the magnetic attraction method, and form a first contact point and a second contact point on the inner wall of the diversion tube and the outer wall of the corrugated tube blank respectively;

[0017] Synchronously adjust the positions of the first contact point and the second contact point, and adjust them close to the welding part of the diversion tube and the corrugated tube blank;

[0018] During welding, the first contact point and the second contact point always follow synchronously with the change of the welding part, and always maintain the closest distance to the welding point.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] In the present invention, by utilizing the mutual attraction of two magnetic spheres inside and outside the diversion tube and the corrugated tube blank, pressure is applied to the inner wall of the diversion tube and the outer wall of the corrugated tube blank simultaneously from two opposite directions to stabilize the position between the diversion tube and the corrugated tube blank. In addition, the rolling property of the outer surface of the magnetic sphere can be utilized for active adjustment, so that the first contact point and the second contact point are close to the welding seam position between the diversion tube and the corrugated tube blank, further ensuring stability during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a titanium alloy laser welding butt joint device proposed by the present invention;

[0022] Figure 2 is Figure 1 the internal structural schematic diagram of;

[0023] Figure 3 is a top view structural schematic diagram of the first ring body and the second ring body in a titanium alloy laser welding butt joint device proposed by the present invention;

[0024] Figure 4 is a structural schematic diagram of a kit and a first magnetic sphere located inside the kit in a titanium alloy laser welding butt joint device proposed by the present invention;

[0025] Figure 5 is a structural schematic diagram of the connection between a vertical rod and a roller in a titanium alloy laser welding butt joint device proposed by the present invention.

[0026] In the figure: 1, the first magnetic sphere; 2, the second magnetic sphere; 3, the kit; 4, the inner sliding plate; 5, the outer sliding plate; 6, the first ring body; 7, the second ring body; 8, the butt joint plate; 9, the ear structure; 10, the hydraulic cylinder; 11, the cylinder; 12, the round rod; 13, the wire; 14, the handle; 15, the vertical rod; 16, the base; 17, the roller; 18, the installation box; 19, the small motor; 20, the bottom plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Reference appendix Figure 1 - Appendix Figure 5 , a butt joint device for laser welding of titanium alloy, comprising:

[0029] The first magnetic sphere 1, having magnetism, is located inside the diversion tube;

[0030] The second magnetic sphere 2, having magnetism, is located outside the bellows tube blank;

[0031] Wherein, the first magnetic sphere 1 and the second magnetic sphere 2 are magnetically attracted to each other. By relying on the magnetic attraction force, the first magnetic sphere 1 is closely attached to the inner wall of the diversion tube and the second magnetic sphere 2 is closely attached to the outer wall of the bellows tube blank, respectively forming a first contact point and a second contact point. The linear distance between the first contact point and the second contact point is the total thickness of the diversion tube and the bellows tube blank.

[0032] Through the above technical solution, by using the mutual attraction of the two magnetic spheres inside and outside the diversion tube and the bellows tube blank, pressure is applied to the inner wall of the diversion tube and the outer wall of the bellows tube blank from two opposite directions simultaneously to make the positions between the diversion tube and the bellows tube blank stable. In addition, the rolling property of the outer surface of the magnetic sphere can be used for active adjustment so that the first contact point and the second contact point are close to the welding seam position between the diversion tube and the bellows tube blank, further ensuring the stability during welding.

[0033] Both the first magnetic sphere 1 and the second magnetic sphere 2 are wrapped by the kit 3, so that the first magnetic sphere 1 and the second magnetic sphere 2 are partially exposed. The kit 3 wrapping the first magnetic sphere 1 is fixedly connected with an inner slide plate 4, and the kit 3 wrapping the second magnetic sphere 2 is fixedly connected with an outer slide plate 5. The sliding tracks of the inner slide plate 4 and the outer slide plate 5 are on the horizontal plane.

[0034] The butt joint device further includes a first ring body 6 and a second ring body 7. The first ring body 6 is provided with a groove adapted to the inner slide plate 4, and the inner slide plate 4 is slidably connected with the first ring body 6. The second ring body 7 is provided with a groove adapted to the outer slide plate 5, and the outer slide plate 5 is slidably connected with the second ring body 7. The stable diversion tube and bellows tube blank are located between the first ring body 6 and the second ring body 7.

[0035] The butt joint device further includes a bottom plate 20 and a docking plate 8. The docking plate 8 and the bottom plate 20 are arranged vertically. The outer edges of both the docking plate 8 and the bottom plate 20 are fixedly connected with ear structures 9. A hydraulic cylinder 10 is installed on the ear structure 9 of the bottom plate 20. The output shaft of the hydraulic cylinder 10 is fixedly connected with the ear structure 9 on the docking plate 8. The hydraulic cylinder 10 is used to control the distance between the docking plate 8 and the bottom plate 20.

[0036] A cylinder 11 and a round rod 12 are fixedly connected coaxially at the center of the bottom plate 20. The round rod 12 is located inside the cylinder 11. One end of the inner slide plate 4 away from the first magnetic sphere 1 is connected with a wire 13. The wire 13 passes through the cylinder 11 and extends inward and is fixedly connected to the outer wall of the round rod 12. A handle 14 is arranged at the top of the round rod 12. By manipulating the handle 14, the round rod 12 is rotated to wind up the wire 13.

[0037] A vertical rod 15 is vertically slidably connected to the second ring body 7. A base 16 is arranged at the bottom of the vertical rod 15. The base 16 is rotatably connected with a roller 17. The roller 17 is placed on the docking plate 8. The base 16 is fixedly connected with an installation box 18. The installation box 18 is provided with a small motor 19. The output shaft of the small motor 19 is fixedly connected to the roller shaft of the roller 17 to drive the active rotation of the roller 17.

[0038] Working principle:

[0039] Rotate the handle 14 to drive the round rod 12 to rotate, so that the wire 13 is wound up. Through the traction of the wire 13, the inner slide plate 4 is close to the cylinder 11, thereby pulling the distance between the first magnetic sphere 1 and the second magnetic sphere 2;

[0040] Keep winding up the wire 13, place the diversion tube sleeved in the corrugated pipe blank on the docking plate 8 at the same time, then cancel the winding of the wire 13, start the hydraulic cylinder 10 to push the docking plate 8 to move in the vertical direction, and move the corrugated pipe blank and the diversion tube located on the docking plate 8 to a suitable height. The suitable height is to push the inner slide plate 4 to move in the vertical direction to make the first magnetic sphere 1 close to the diversion tube and the corrugated pipe blank. During this process, the second magnetic sphere 2 near the corrugated pipe blank approaches due to magnetic attraction until it touches the diversion tube and the corrugated pipe blank respectively and then stops;

[0041] During welding, start the motor to drive the roller 17 to rotate, so that the second ring body 7 starts to rotate. Then the second magnetic sphere 2 rolls itself and revolves around the outer wall of the corrugated pipe blank. Due to magnetic attraction, the first magnetic sphere 1 also starts to roll itself and revolves around the inner wall of the diversion tube, so that the first contact point and the second contact point always follow the welding part between the diversion tube and the corrugated pipe blank, avoiding problems such as increased welding deformation, uneven distribution of welding stress and decreased welding quality caused by the too far distance between the contact point and the welding point.

[0042] It should be noted that: Titanium alloy is usually not magnetically attracted, or only has weak magnetism.

[0043] Titanium alloys are mainly composed of titanium and other alloying elements. Titanium itself is a paramagnetic material with very weak magnetism. In daily life and general industrial applications, it is usually considered that titanium alloys do not have magnetism and will not be significantly attracted by magnets. Even if some magnetic alloying elements such as iron and nickel are added to titanium alloys, it may make the titanium alloys have certain magnetism, but generally the content will not be high, and this magnetism is generally relatively weak and can be ignored.

[0044] As mentioned above, only the preferred specific embodiments of the present invention are described, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A device for laser welding of titanium alloys, characterized in that: include: A first magnetic sphere (1) having magnetic properties and located inside the flow guide tube; A second magnetic sphere (2) having magnetic properties and located outside the corrugated tube blank; The first magnetic sphere (1) and the second magnetic sphere (2) are magnetically attracted to each other, and the first magnetic sphere (1) is closely attached to the inner wall of the guide tube and the second magnetic sphere (2) is closely attached to the outer wall of the corrugated tube blank by means of the magnetic attraction force, thereby forming a first contact point and a second contact point respectively, and the straight-line distance between the first contact point and the second contact point is the sum of the thicknesses of the guide tube and the corrugated tube blank.

2. The device for laser welding and butting titanium alloy according to claim 1, characterized in that: The first magnetic sphere (1) and the second magnetic sphere (2) are both wrapped by a set (3) so that the first magnetic sphere (1) and the second magnetic sphere (2) are partially exposed; the set (3) wrapping the first magnetic sphere (1) is fixedly connected to an inner slide plate (4); the set (3) wrapping the second magnetic sphere (2) is fixedly connected to an outer slide plate (5); and the sliding tracks of the inner slide plate (4) and the outer slide plate (5) are on a horizontal plane.

3. The device for laser welding and butting titanium alloy according to claim 1, characterized in that: The docking device further comprises a first ring body (6) and a second ring body (7); the first ring body (6) is provided with a groove body adapted to the inner slide plate (4); the inner slide plate (4) and the first ring body (6) are slidably connected; the second ring body (7) is provided with a groove body adapted to the outer slide plate (5); the outer slide plate (5) and the second ring body (7) are slidably connected; and a stable guide pipe and a corrugated pipe blank are located between the first ring body (6) and the second ring body (7).

4. The device for laser welding and butting titanium alloy according to claim 1, characterized in that: The docking device also includes a base plate (20) and a docking plate (8), wherein the docking plate (8) and the base plate (20) are arranged up and down, and the outer edges of the docking plate (8) and the base plate (20) are fixedly connected with ear structures (9), and a hydraulic cylinder (10) is installed on the ear structure (9) of the base plate (20), and the output shaft of the hydraulic cylinder (10) is fixedly connected to the ear structure (9) on the docking plate (8), and the hydraulic cylinder (10) is used to control the distance between the docking plate (8) and the base plate (20).

5. The device for laser welding and butting titanium alloy according to claim 4, characterized in that: The center of the bottom plate (20) is coaxially fixedly connected with a cylinder (11) and a round rod (12); the round rod (12) is located inside the cylinder (11); an end of the inner slide plate (4) away from the first magnetic sphere (1) is connected with a wire (13); the wire (13) passes through the cylinder (11), extends inwardly and is fixedly connected to the outer wall of the round rod (12); a handle (14) is provided on the top of the round rod (12); the handle (14) is operated to rotate the round rod (12) and thus the wire (13) is rolled up.

6. The device for laser welding and butting titanium alloy according to claim 3 is characterized in that: The second ring body (7) is vertically slidably connected to a vertical rod (15), a base (16) is provided at the bottom of the vertical rod (15), the base (16) is rotatably connected to a roller (17), the roller (17) is placed on the docking plate (8), the base (16) is fixedly connected to a mounting box (18), the mounting box (18) is provided with a small motor (19), the output shaft of the small motor (19) is fixedly connected to the roller shaft of the roller (17), so as to drive the roller (17) to rotate actively.

7. A method for laser welding of titanium alloy, characterized in that: The titanium alloy laser welding butt joint device according to any one of claims 1 to 6 comprises the following steps: The inner wall of the guide tube and the outer wall of the bellows blank are simultaneously pressed from both inside and outside directions by means of magnetic attraction, so as to form a first contact point and a second contact point on the inner wall of the guide tube and the outer wall of the bellows blank respectively; The first and second contact points are synchronously adjusted to be close to the welding position of the guide pipe and the bellows blank; During welding, the first contact point and the second contact point always follow the changes of the welding part synchronously and always maintain the shortest distance to the welding point.

Images