A coaxial positioning welding tool for titanium alloy tube

Abstract

The present invention provides a coaxial positioning welding tool for titanium alloy tubes, belonging to the technical field of welding tooling; it comprises a base, and also comprises: a positioning assembly, wherein the positioning assembly is used to clamp and position two titanium alloy tube bodies, and the positioning assembly comprises a plurality of lower support seats fixed on the base, wherein two lower support wheels are rotatably connected in the lower support seats, and the lower support wheels are used to rotatably support the two titanium alloy tube bodies, and a driving motor for driving the lower support wheels to rotate is fixed on the side of the lower support seats. The present invention places the two titanium alloy tube bodies on the corresponding lower support wheels respectively through the setting of the positioning assembly, and the multiple lower support wheels on the base are of the same height, thereby ensuring that the titanium alloy tube bodies placed on the lower support wheels are concentric, and the pressure wheel is pressed on the top of the titanium alloy tube body by a hydraulic cylinder, thereby achieving the clamping and positioning of the titanium alloy tube body, and preventing the two titanium alloy tube bodies from being misaligned, thereby ensuring the coaxiality of the two titanium alloy tube bodies.

Description

Technical Field

[0001] The invention relates to the technical field of welding tooling, and in particular to a coaxial positioning welding tooling for a titanium alloy pipe. Background Art

[0002] Titanium alloy tube welding tooling refers to a clamp used to position two titanium alloy tubes when they are butt-jointed. The ends of the two titanium alloy tubes are fitted together and fixed by the clamp to achieve positioning of the titanium alloy tubes, align the ends of the two titanium alloy tubes, and then use a welding gun with titanium alloy welding wire to achieve welding connection of the two titanium alloy tube ends. Before welding, the divergent ends of the two titanium alloy tubes must be closed first, and inert gas is introduced into the closed end of one of the titanium alloy tubes. A stripper hood must also be installed on the welding gun. The stripper hood is connected to the gas tank through an air pipe. The inert gas enters the stripper hood through the pipeline and is sprayed out from the metal mesh position inside the stripper hood to prevent the intrusion of oxygen and nitrogen in the air and ensure the welding quality.

[0003] After searching, the Chinese patent with the authorization announcement number CN220921423U discloses a welding fixture, including a workbench, a clamping assembly is installed on the top wall of the workbench, and a clamping assembly is installed on the top wall of the clamping assembly. The utility model relates to the technical field of fixtures; the welding fixture, by putting the pipe workpiece into the clamping tube through the receiving tube, the operating knob drives the threaded rod, the clamping block and the anti-skid pad to approach each other to clamp and fix the pipe workpiece, the operating handle drives the lead screw and the trapezoidal slider to approach along the lead screw on the inner wall of the trapezoidal slide groove, the trapezoidal slider drives the mounting plate, the mounting seat, the clamping tube, the receiving tube and the clamped and fixed pipe workpiece to approach and abut each other, the stepping motor is started to drive the small pulley to rotate, and the large pulley is driven to rotate by the belt, so that when welding the pipe workpiece, workpieces of different diameters can be clamped and fixed, and the pipe workpiece can be rotated while welding during welding, so as to ensure that two shorter pipe workpieces are welded for one circle more conveniently.

[0004] The above-mentioned patent utilizes the cooperation of threaded rods and clamping blocks to achieve the clamping and positioning of tube workpieces (titanium alloy tubes). When welding two titanium alloy tubes, the two titanium alloy tubes need to be inserted into two clamping tubes respectively to achieve the clamping and positioning of the titanium alloy tubes before welding. The number of threaded rods on the same clamping tube is three. After the titanium alloy tube to be welded is inserted into the clamping tube, the three threaded rods need to be rotated in sequence. The threaded rod drives the clamping block to move to achieve the clamping and positioning of the titanium alloy tube, and then the threaded rod on the other clamping tube is rotated to achieve the clamping and positioning of the other titanium alloy tube. When the threaded rod is manually rotated to clamp and position the titanium alloy tube, it is difficult to ensure that the moving distance of the clamping block at the two clamping tubes remains consistent, thereby making it difficult to ensure the coaxiality of the two titanium alloy tubes. Therefore, the present application provides a titanium alloy tube coaxial positioning welding tool to meet the needs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a coaxial positioning welding tool for titanium alloy tubes to solve the problem that it is difficult to ensure the coaxiality of two titanium alloy tubes when clamping and positioning the two titanium alloy tubes.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A titanium alloy tube coaxial positioning welding tool, comprising a base, and also comprising:

[0008] A positioning assembly, the positioning assembly is used to clamp and position two titanium alloy tube bodies, the positioning assembly includes a plurality of lower support seats fixed on the base, two lower support wheels are rotatably connected in the lower support seats, the lower support wheels are used to rotatably support the two titanium alloy tube bodies, a driving motor for driving the lower support wheels to rotate is fixed on the side of the lower support seat, a bracket is fixed on the base, a hydraulic cylinder is fixed on the bracket, the telescopic end of the hydraulic cylinder movably passes through the bracket and is fixed with an upper pressing frame, the inner wall of the upper pressing frame is rotatably connected with two groups of pressing wheels, and the two groups of pressing wheels are respectively pressed on the top of the two titanium alloy tube bodies;

[0009] A shield, a fixing seat is fixed on the base, the shield is fixed to the top of the fixing seat, the shield is arc-shaped, the shield is located between two adjacent lower support seats, a metal wire mesh is fixed on the inner wall of the shield, and a joint is connected to the side of the shield. During welding, inert gas enters the shield through the joint and is sprayed out from the metal wire mesh, squeezing the air out of the weld to protect the weld on the titanium alloy tube body. Rubber baffles are fixed on both sides of the shield, the rubber baffles are attached to the circumferential surface of the titanium alloy tube body, the rubber baffles are used to adapt to titanium alloy tube bodies of different diameters, and several elastic strips are fixed on the side of the rubber baffle. A positioning sleeve is provided on the top of the shield, the positioning sleeve is used to position the welding gun, and a connecting plate is fixed on the side of the positioning sleeve away from the titanium alloy tube body, and a driving assembly is provided at the bottom of the connecting plate. After the rubber baffle is deformed, the positioning sleeve is driven to move by the driving assembly.

[0010] Preferably, a guide block is fixed on the top of the shield, the guide block is in an inverted isosceles trapezoid, a guide groove is provided at the bottom of the positioning sleeve, and the surface of the guide block is slidably connected to the inner wall of the guide groove.

[0011] Preferably, a self-locking component is provided in the positioning sleeve, and the self-locking component includes a square groove opened at the top of the inner wall of the guide groove, and the inner wall of the square groove is slidably connected with a square block, and the top of the square block is respectively fixed with a vertical bar and a tension spring, the vertical bar is located inside the tension spring, and the top of the tension spring is fixedly connected to the top of the inner wall of the square groove, the top of the vertical bar movably passes through the positioning sleeve and extends to the inside of the positioning sleeve, the top of the vertical bar is hemispherical, and a clamping block is fixed at the bottom of the block, the clamping block is located inside the square groove, and a clamping groove is provided on the top of the guide block.

[0012] Preferably, the card block is in the shape of an isosceles triangle, and the shape of the card slot matches the shape of the card block.

[0013] Preferably, an indicator block is fixed on the positioning sleeve, and the side and the top of the indicator block close to the titanium alloy tube body are both in an inverted V shape.

[0014] Preferably, the driving assembly includes a connecting strip, and both sides of the shield are rotatably connected with a linkage plate, the linkage plate includes an inclined portion and an extrusion portion connected to each other, the end of the inclined portion away from the extrusion portion is movably connected to an elastic strip, the inclined portion is rotatably connected to the side of the shield, and a spring sheet is fixed to the side of the shield, the spring sheet includes a connecting portion and a bending portion connected to each other, the connecting portion is fixed to a side of the shield away from the titanium alloy tube body, the side of the bending portion is fitted with the side of the extrusion portion, the connecting strip is fixed to the bottom of the connecting plate, and the side of the connecting strip is fixedly connected to the side of the bending portion away from the shield.

[0015] Preferably, a positioning seat is fixed on the side of the shield, a through slot is opened on the side of the inclined portion, a rotating shaft is fixed on the inner wall of the through slot, and the circumferential surface of the rotating shaft is rotatably connected to the inner wall of the positioning seat.

[0016] Preferably, a limiting block is fixed on the circumferential surface of the first elastic strip, and a side surface of the limiting block abuts against an end of the inclined portion away from the elastic sheet.

[0017] Preferably, a first curved surface is provided on the contact surface between the limiting block and the inclined portion, and a second curved surface is provided on the end of the inclined portion away from the elastic sheet.

[0018] Preferably, a second elastic bar is fixed to the inner wall of the curved portion.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] In the above scheme, through the setting of the positioning assembly, the two titanium alloy tube bodies are respectively placed on the corresponding lower support wheels, and the heights of the multiple lower support wheels on the base are consistent, thereby ensuring that the titanium alloy tube bodies placed on the lower support wheels are concentric, and the pressure wheel is pressed on the top of the titanium alloy tube body by using the hydraulic cylinder to achieve the clamping and positioning of the titanium alloy tube body, and prevent the two titanium alloy tube bodies from misalignment, thereby ensuring the coaxiality of the two titanium alloy tube bodies.

[0021] Through the setting of the shield and the rubber baffle, during welding, inert gas is introduced into the shield and sprayed out from the metal wire mesh to squeeze the air out of the weld, thereby protecting the weld on the titanium alloy tube body. The rubber baffle is fixed on both sides of the shield to block the air and effectively prevent air from entering the weld. A spring strip is fixed on the rubber baffle, and both the rubber baffle and the spring strip can be deformed to adapt to titanium alloy tube bodies of various diameters, and can fit with the surfaces of titanium alloy tube bodies of various diameters under the action of their own elasticity.

[0022] Through the setting of the positioning sleeve and the driving assembly, when welding the titanium alloy tube body, the head of the welding gun is inserted into the positioning sleeve, and the positioning of the welding gun is realized by the positioning sleeve. When adapting to titanium alloy tube bodies of various diameters through the rubber baffle, the rubber baffle is deformed and at the same time the positioning sleeve is driven to move by the driving assembly to realize automatic adjustment of the position of the positioning sleeve. The positioning sleeve can be adapted to the welding of titanium alloy tube bodies of various diameters without manual adjustment of the positioning sleeve, and is more convenient to use.

[0023] Through the setting of the self-locking component, when the head of the welding gun is inserted into the positioning sleeve, the welding gun squeezes the top of the vertical bar, so that the vertical bar drives the block to move downward, so that the card block is inserted into the card slot to lock the positioning sleeve, thereby achieving stable positioning of the welding gun and preventing the welding gun from being too close to the titanium alloy tube body and affecting the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the joint of the present invention;

[0027] Figure 3 It is an enlarged view of the positioning sleeve structure of the present invention;

[0028] Figure 4 It is a front cross-sectional view of the positioning sleeve of the present invention;

[0029] Figure 5 This is an enlarged view of the structure of the connecting strip of the present invention;

[0030] Figure 6 For the present invention Figure 5 A magnified view of the structure at center;

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the metal wire mesh of the present invention;

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the linkage plate of the present invention;

[0033] Fig. 9 It is a three-dimensional structural diagram of the spring piece of the present invention;

[0034] Fig.10 It is a top view cross-sectional schematic diagram of the rotating shaft of the present invention.

[0035] [Reference Signs]

[0036] 1. Base; 2. Titanium alloy tube body; 3. Positioning assembly; 31. Lower support seat; 32. Lower support wheel; 33. Driving motor; 34. Bracket; 35. Hydraulic cylinder; 36. Upper pressure frame; 37. Pressure wheel; 4. Shield; 41. Wire mesh; 5. Joint; 6. Rubber baffle; 7. Elastic strip one; 8. Driving assembly; 81. Linkage plate; 811. Inclined part; 812. Extrusion part; 82. Positioning seat; 83. Rotating shaft; 84. Shrapnel; 841. Connecting part; 842. Bending part; 85. Connecting strip; 86. Elastic strip two; 87. Limiting block; 9. Self-locking assembly; 91. Vertical bar; 92. Square block; 93. Square groove; 94. Tension spring; 95. Block; 96. Slot; 10. Positioning sleeve; 11. Connecting plate; 12. Guide block; 13. Guide groove; 14. Indicator block.

[0037] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0038] The following is a detailed description of a coaxial positioning welding tool for a titanium alloy tube provided by the present invention in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0039] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0040] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0041] like Figure 1-Figure 10 As shown, an embodiment of the present invention provides a coaxial positioning welding tool for a titanium alloy tube, comprising a base 1, and further comprising:

[0042] The positioning assembly 3 is used to clamp and position the two titanium alloy tube bodies 2. The positioning assembly 3 includes a plurality of lower support seats 31 fixed on the base 1. Two lower support wheels 32 are rotatably connected in the lower support seats 31. The lower support wheels 32 are used to rotatably support the two titanium alloy tube bodies 2. A driving motor 33 for driving the lower support wheels 32 to rotate is fixed on the side of the lower support seat 31. A bracket 34 is fixed on the base 1. A hydraulic cylinder 35 is fixed on the bracket 34. The telescopic end of the hydraulic cylinder 35 movably penetrates the bracket 34 and is fixed with an upper pressure frame 3 6. The inner wall of the upper pressing frame 36 is rotatably connected with two groups of pressing wheels 37. The two groups of pressing wheels 37 are respectively pressed on the top of the two titanium alloy tube bodies 2, and the two titanium alloy tube bodies 2 are respectively placed on the corresponding lower supporting wheels 32. The multiple lower supporting wheels 32 on the base 1 are of the same height, thereby ensuring that the titanium alloy tube bodies 2 placed on the lower supporting wheels 32 are concentric. The hydraulic cylinder 35 is started, so that the piston rod of the hydraulic cylinder 35 is extended to drive the upper pressing frame 36 to move downward, and the upper pressing frame 36 drives the pressing wheels 37 to press on the top of the titanium alloy tube body 2, so as to achieve the clamping and positioning of the titanium alloy tube body 2;

[0043] The shield 4 is provided with a fixing seat on the base 1, and the shield 4 is fixed on the top of the fixing seat. The shield 4 is arc-shaped, and the shield 4 is located between two adjacent lower support seats 31. At the same time, the shield 4 is located obliquely below the titanium alloy tube body 2. A metal wire mesh 41 is fixed to the inner wall of the shield 4, and a joint 5 is connected to the side of the shield 4. During welding, the inert gas enters the shield 4 through the joint 5 and is sprayed out from the metal wire mesh 41, and the air is squeezed out from the weld to achieve protection of the weld on the titanium alloy tube body 2. Rubber baffles 6 are fixed on both sides of the shield 4. The rubber baffles 6 have a blocking effect on the air and effectively prevent the air from entering the weld from both sides of the shield 4. The rubber baffles 6 are attached to the circumferential surface of the titanium alloy tube body 2. The rubber baffles 6 are used to adapt to titanium alloy tube bodies 2 of different diameters. Several elastic bars 7 are fixed on the side of the rubber baffle 6, and the several elastic bars 7 are dispersed with each other. A positioning sleeve 10 is provided on the top of the shield 4. The positioning sleeve 10 is used to position the welding gun. The inner wall of the positioning sleeve 10 The shape is adapted to the shape of the welding gun head. A connecting plate 11 is fixed to the side of the positioning sleeve 10 away from the titanium alloy tube body 2. A driving assembly 8 is arranged at the bottom of the connecting plate 11. After the rubber baffle 6 is deformed, the positioning sleeve 10 is driven to move by the driving assembly 8. After the titanium alloy tube body 2 is clamped and positioned, the two divergent ends of the titanium alloy tube body 2 are closed, and inert gas is introduced into one of the ends. The rubber baffle 6 is fitted on the circumferential surface of the titanium alloy tube body 2 under the action of its own elastic force and the elastic force of the elastic strip 7. The head of the welding gun is inserted into the positioning sleeve 10. After the welding gun is positioned, the driving motor 33 is started. The driving motor 33 drives the lower support wheel 32 to rotate slowly. The lower support wheel 32 drives the titanium alloy tube body 2 to rotate slowly. The welding of the joint at the connecting end of the titanium alloy tube body 2 is realized by the cooperation of the welding gun and the titanium alloy welding wire. The welding completion position enters the shield 4 as the titanium alloy tube body 2 rotates. The inert gas is sprayed from the shield 4 to squeeze the air out of the weld to realize the protection of the weld.

[0044] like Figure 5 As shown, in this embodiment, a guide block 12 is fixed to the top of the shield 4, and the guide block 12 is an inverted isosceles trapezoid. A guide groove 13 is provided at the bottom of the positioning sleeve 10. The surface of the guide block 12 is slidably connected to the inner wall of the guide groove 13. When the positioning sleeve 10 moves, it moves along the surface of the guide block 12. The guide block 12 is used to guide the positioning sleeve 10 when it moves, so that the movement of the positioning sleeve 10 is smoother.

[0045] like Figure 5As shown, in this embodiment, a self-locking component 9 is provided in the positioning sleeve 10, and the self-locking component 9 includes a square groove 93 opened at the top of the inner wall of the guide groove 13, and the inner wall of the square groove 93 is slidably connected with a block 92, and the top of the block 92 is respectively fixed with a vertical bar 91 and a tension spring 94, the vertical bar 91 is located inside the tension spring 94, and the top of the tension spring 94 is fixedly connected to the top of the inner wall of the square groove 93, the top of the vertical bar 91 movably passes through the positioning sleeve 10 and extends to the inside of the positioning sleeve 10, the top of the vertical bar 91 is hemispherical, and the bottom of the block 92 is fixed with a card block 95, the card block 95 is located inside the square groove 93, and a card slot 96 is provided on the top of the guide block 12. The head of the welding gun is inserted into the positioning sleeve 10, and the welding gun squeezes the top of the vertical bar 91, so that the vertical bar 91 drives the block 92 to move downward along the square groove 93, and the block 92 drives the tension spring 94 to be in a stretched state. At the same time, the block 92 drives the card block 95 to move downward, and the card block 95 is inserted into the card slot 96 to lock the positioning sleeve 10, thereby achieving stable positioning of the welding gun and preventing the welding gun from being too close to the titanium alloy tube body 2 and affecting the welding quality.

[0046] like Figure 6 As shown, in this embodiment, the block 95 is an isosceles triangle, and the shape of the slot 96 is adapted to the shape of the block 95, so that the hypotenuse of the block 95 fits with the inclined surface of the inner wall of the slot 96, preventing the block 95 from shaking in the slot 96 and improving the locking stability of the positioning sleeve 10.

[0047] like Figure 3 As shown, in this embodiment, an indicator block 14 is fixed on the positioning sleeve 10, and the side and top of the indicator block 14 close to the titanium alloy tube body 2 are both in an inverted V shape. The accuracy of the placement of the titanium alloy tube body 2 can be judged by whether the tip of the inverted V shape on the indicator block 14 is aligned with the connecting ends of the two titanium alloy tube bodies 2.

[0048] like Figure 8 and Fig. 9As shown, in this embodiment, the driving assembly 8 includes a connecting strip 85, and both sides of the shield 4 are rotatably connected with a linkage plate 81, and the linkage plate 81 includes an inclined portion 811 and an extrusion portion 812 that are connected to each other. The end of the inclined portion 811 away from the extrusion portion 812 is movably connected to the elastic strip 7, and the inclined portion 811 is rotatably connected to the side of the shield 4. The side of the shield 4 is fixed with a spring piece 84, and the spring piece 84 includes a connecting portion 841 and a bending portion 842 that are connected to each other. The connecting portion 841 is fixed to the side of the shield 4 away from the titanium alloy tube body 2, and the bending portion The side surface of 842 fits with the side surface of the extrusion portion 812, the connecting strip 85 is fixed to the bottom of the connecting plate 11, and the side surface of the connecting strip 85 is fixedly connected to the side of the curved portion 842 away from the shield 4. When the rubber baffle 6 rotates, it drives the inclined portion 811 of the linkage plate 81 to rotate, and the inclined portion 811 drives the extrusion portion 812 to squeeze the curved portion 842 of the spring piece 84, so that the curved portion 842 is deformed and drives the positioning sleeve 10 on the side of the connecting plate 11 to move away from the titanium alloy tube body 2 through the connecting strip 85, thereby realizing the automatic movement of the positioning sleeve 10.

[0049] like Fig.10 As shown, in this embodiment, a positioning seat 82 is fixed to the side of the shield 4, a through groove is opened on the side of the inclined portion 811, and a rotating shaft 83 is fixed to the inner wall of the through groove. The circumferential surface of the rotating shaft 83 is rotatably connected to the inner wall of the positioning seat 82. When the inclined portion 811 rotates, the rotating shaft 83 is driven to rotate along the inner wall of the positioning seat 82, thereby realizing the rotational connection between the linkage plate 81 and the shield 4.

[0050] like Figure 3 and Figure 8 As shown, in this embodiment, a limit block 87 is fixed on the circumferential surface of the elastic bar 7, and the side surface of the limit block 87 conflicts with the end of the inclined portion 811 away from the spring piece 84. The limit block 87 is used to prevent the inclined portion 811 of the linkage plate 81 from separating from the elastic bar 7, thereby ensuring that the elastic bar 7 stably drives the linkage plate 81 to rotate.

[0051] like Fig. 9 As shown, in this embodiment, the contact surface between the limit block 87 and the inclined portion 811 is provided with curved surface one, and the end of the inclined portion 811 away from the spring piece 84 is provided with curved surface two. Through the cooperation of curved surface one and curved surface two, the inclined portion 811 is prevented from getting stuck when rotating, so that the rotation of the linkage plate 81 is smoother.

[0052] like Figure 5 As shown, in this embodiment, a second elastic bar 86 is fixed to the inner wall of the curved portion 842 , and the second elastic bar 86 is used to assist the spring piece 84 to return to the initial state, thereby ensuring the elastic force of the spring piece 84 and increasing the service life of the spring piece 84 .

[0053] Working principle: Place two titanium alloy tube bodies 2 on the corresponding lower support wheels 32 respectively, and the multiple lower support wheels 32 on the base 1 are of the same height to ensure that the titanium alloy tube bodies 2 placed on the lower support wheels 32 are concentric, so that the connecting ends of the two titanium alloy tube bodies 2 are aligned with the position of the indicator block 14, and then start the hydraulic cylinder 35 to extend the piston rod of the hydraulic cylinder 35 to drive the upper pressing frame 36 to move downward, and the upper pressing frame 36 drives the pressing wheel 37 to press on the top of the titanium alloy tube body 2 to achieve the clamping and positioning of the titanium alloy tube body 2, and then close the divergent ends of the two titanium alloy tube bodies 2, and introduce inert gas into one of the ends, and use transparent tape to close it;

[0054] When the titanium alloy tube body 2 is placed on the lower support wheel 32, the titanium alloy tube body 2 squeezes the rubber baffle 6, so that the rubber baffle 6 and the spring bar 7 are deformed synchronously. When the spring bar 7 is deformed, it drives the rotating shaft 83 on the linkage plate 81 to rotate along the inner wall of the positioning seat 82. The extrusion portion 812 on the linkage plate 81 squeezes the bending portion 842 of the spring sheet 84, so that the bending portion 842 is deformed and drives the positioning sleeve 10 on the side of the connecting plate 11 to move away from the titanium alloy tube body 2 along the surface of the guide block 12 through the connecting strip 85, so as to realize automatic adjustment of the position of the positioning sleeve 10. There is no need to manually adjust the positioning sleeve 10, so that the positioning sleeve 10 can adapt to the welding of titanium alloy tube bodies 2 with various diameters, which is more convenient to use. Moreover, the rubber baffle 6 and the spring bar 7 can both be deformed to adapt to titanium alloy tube bodies 2 with various diameters, and can fit with the surfaces of titanium alloy tube bodies 2 with various diameters under the action of their own elasticity.

[0055] After the titanium alloy tube body 2 is clamped and positioned, the head of the welding gun is inserted into the positioning sleeve 10, and the valve on the gas tank is opened at the same time, so that the inert gas in the gas tank enters the shield 4 through the gas pipe and the joint 5, and is ejected from the metal wire mesh 41. When the welding gun is inserted into the positioning sleeve 10, the welding gun squeezes the top of the vertical bar 91, so that the vertical bar 91 drives the block 92 to move downward along the square groove 93, and the block 92 drives the tension spring 94 to be in a stretched state. At the same time, the block 92 drives the block 95 to move downward, and the block 95 is inserted into the groove 96 to achieve positioning. The locking of the positioning sleeve 10 realizes the stable positioning of the welding gun, preventing the welding gun from being too close to the titanium alloy tube body 2 and affecting the welding quality. After the welding gun is positioned, the driving motor 33 is started, and the driving motor 33 drives the lower support wheel 32 to rotate slowly, and the lower support wheel 32 drives the titanium alloy tube body 2 to rotate slowly, thereby realizing the welding of the joint at the connection end of the titanium alloy tube body 2. The welding completion position enters the shield 4 as the titanium alloy tube body 2 rotates, and the shield 4 sprays inert gas to squeeze the air out of the weld to realize the protection of the weld.

[0056] After welding is completed, the welding gun is pulled out from the positioning sleeve 10. After being pulled out, the welding gun no longer squeezes the vertical bar 91. The block 92 moves upward under the tension of the tension spring 94, driving the clamping block 95 to separate from the clamping groove 96. After separation, the lock of the positioning sleeve 10 can be released, and the closure of the end of the titanium alloy tube can be released. Then the piston rod of the hydraulic cylinder 35 is shortened to drive the upper pressure frame 36 to move upward, and the upper pressure frame 36 drives the pressure wheel 37 to move upward, releasing the positioning of the titanium alloy tube body 2, and then the welded titanium alloy tube body 2 can be removed from the lower support wheel 32. After the titanium alloy tube body 2 is removed, the rubber baffle 6 returns to its initial state under the action of its own elasticity and the elastic force of the spring bar 7. At the same time, the spring sheet 84 returns to its initial state under the action of its own elastic force. During the recovery process, the spring sheet 84 drives the linkage plate 81 to rotate in the opposite direction. During the reverse rotation of the linkage plate 81, the spring bar 7 is squeezed, thereby assisting the recovery of the rubber baffle 6.

[0057] The present invention encompasses any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0058] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A titanium alloy tube coaxial positioning welding tool, comprising a base (1), characterized in that: Also includes: A positioning assembly (3), the positioning assembly (3) being used for clamping and positioning two titanium alloy tube bodies (2), the positioning assembly (3) comprising a plurality of lower support seats (31) fixed on the base (1), two lower support wheels (32) being rotatably connected inside the lower support seats (31), the lower support wheels (32) being used for rotatably supporting the two titanium alloy tube bodies (2), a driving motor (33) being fixed on the side of the lower support seat (31) for driving the lower support wheels (32) to rotate, a bracket (34) being fixed on the base (1), a hydraulic cylinder (35) being fixed on the bracket (34), a telescopic end of the hydraulic cylinder (35) movably passing through the bracket (34) and being fixed with an upper pressing frame (36), the inner wall of the upper pressing frame (36) being rotatably connected with two groups of pressing wheels (37), the two groups of pressing wheels (37) being respectively pressed on the top of the two titanium alloy tube bodies (2); A shield (4), wherein a fixing seat is fixed on the base (1), the shield (4) is fixed on the top of the fixing seat, the shield (4) is arc-shaped, the shield (4) is located between two adjacent lower support seats (31), a metal wire mesh (41) is fixed on the inner wall of the shield (4), and a joint (5) is connected to the side of the shield (4). During welding, inert gas enters the shield (4) through the joint (5) and is ejected from the metal wire mesh (41), squeezing air out of the weld, thereby protecting the weld on the titanium alloy tube body (2). Rubber baffles (6) are fixed on both sides of the shield (4), the rubber baffles (6) are attached to the circumferential surface of the titanium alloy tube body (2), and the rubber baffles (6) are used to adapt to titanium alloy tube bodies (2) of different diameters. The rubber baffles (6) A plurality of spring bars (7) are fixed on the side surface, a positioning sleeve (10) is arranged on the top of the shield (4), the positioning sleeve (10) is used to position the welding gun, a connecting plate (11) is fixed on the side of the positioning sleeve (10) away from the titanium alloy tube body (2), a driving assembly (8) is arranged on the bottom of the connecting plate (11), the rubber baffle (6) drives the positioning sleeve (10) to move through the driving assembly (8) after deformation, a guide block (12) is fixed on the top of the shield (4), the guide block (12) is in an inverted isosceles trapezoid, a guide groove (13) is arranged on the bottom of the positioning sleeve (10), the surface of the guide block (12) is slidably connected to the inner wall of the guide groove (13), a self-locking assembly (9) is arranged in the positioning sleeve (10), the self-locking assembly (9) includes a self-locking assembly (9) arranged in the guide groove (13) 3) a square groove (93) at the top of the inner wall, the inner wall of the square groove (93) is slidably connected to a square block (92), the top of the square block (92) is respectively fixed with a vertical bar (91) and a tension spring (94), the vertical bar (91) is located inside the tension spring (94), and the top of the tension spring (94) is fixedly connected to the top of the inner wall of the square groove (93), the top of the vertical bar (91) movably passes through the positioning sleeve (10) and extends to the inside of the positioning sleeve (10), the top of the vertical bar (91) is hemispherical, a clamping block (95) is fixed to the bottom of the square block (92), the clamping block (95) is located inside the square groove (93), and a clamping groove (96) is opened on the top of the guide block (12), the driving assembly (8) includes a connecting bar (85), and both sides of the shield (4) are rotatably connected to linkage plates (8 1), the linkage plate (81) comprises an inclined portion (811) and an extrusion portion (812) connected to each other, one end of the inclined portion (811) away from the extrusion portion (812) is movably connected to an elastic bar (7), the inclined portion (811) is rotatably connected to a side of a shield (4), a spring sheet (84) is fixed to the side of the shield (4), the spring sheet (84) comprises a connecting portion (841) and a bending portion (842) connected to each other, the connecting portion (841) is fixed to a side of the shield (4) away from the titanium alloy tube body (2), the side of the bending portion (842) is in contact with the side of the extrusion portion (812), the connecting bar (85) is fixed to the bottom of the connecting plate (11), and the side of the connecting bar (85) is fixedly connected to a side of the bending portion (842) away from the shield (4).

2. The coaxial positioning welding tool for titanium alloy tube according to claim 1 is characterized in that: The clamping block (95) is in the shape of an isosceles triangle, and the shape of the clamping slot (96) is adapted to the shape of the clamping block (95).

3. The coaxial positioning welding tool for titanium alloy tube according to claim 1 is characterized in that: An indicator block (14) is fixed on the positioning sleeve (10), and the side and top of the indicator block (14) close to the titanium alloy tube body (2) are both in an inverted V shape.

4. The coaxial positioning welding tool for titanium alloy tube according to claim 1 is characterized in that: A positioning seat (82) is fixed on the side of the shield (4), a through slot is provided on the side of the inclined portion (811), a rotating shaft (83) is fixed on the inner wall of the through slot, and a circumferential surface of the rotating shaft (83) is rotatably connected to the inner wall of the positioning seat (82).

5. The coaxial positioning welding tool for titanium alloy tube according to claim 1 is characterized in that: A limiting block (87) is fixed on the circumferential surface of the elastic strip (7), and a side surface of the limiting block (87) abuts against an end of the inclined portion (811) away from the elastic sheet (84).

6. The coaxial positioning welding tool for titanium alloy tube according to claim 5 is characterized in that: The contact surface between the limit block (87) and the inclined portion (811) is provided with a first curved surface, and the end of the inclined portion (811) away from the spring sheet (84) is provided with a second curved surface.

7. The coaxial positioning welding tool for titanium alloy tube according to claim 1 is characterized in that: A second elastic bar (86) is fixed to the inner wall of the curved portion (842).

Images