Zirconium-hafnium alloy welding technology and equipment

Abstract

The invention relates to the technical field of zirconium-hafnium alloy welding, and discloses zirconium-hafnium alloy welding equipment which comprises a sealing box, a welding frame is installed in the middle of the top of the inner side wall of the sealing box through a first electric telescopic rod, and side limiting plates are welded to the front end and the rear end of the welding frame correspondingly; according to the zirconium-hafnium alloy welding equipment disclosed by the invention, the welding plates which are mounted in the welding frame and can be driven by the first bidirectional displacement driving assembly are adopted, and the distance between the two welding plates can be flexibly adjusted according to the thickness of a to-be-welded workpiece so as to adapt to double-sided welding of the to-be-welded workpieces with different thicknesses; fixed clamping frames driven by third two-way displacement driving assemblies are mounted at the left end and the right end of the bottom of the inner side wall of the sealing box correspondingly, and two movable side clamping plates driven by second two-way displacement driving assemblies are mounted in the fixed clamping frames; the to-be-welded workpieces with different thicknesses can be stably clamped, the center line of the to-be-welded workpieces is kept consistent with the center line of the double-face welding assembly all the time, and dislocation during welding is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of zirconium-hafnium alloy welding, in particular to a zirconium-hafnium alloy welding technology and equipment. Background Art

[0002] Zirconium-hafnium alloy is a friction pair material composed of hafnium, zirconium, copper and other elements. It has the characteristics of low friction coefficient, good wear resistance and heat resistance, and is widely used in aerospace, aviation, heavy machinery and other fields. During zirconium welding, the weld and heat-affected zone are easily contaminated by oxygen, hydrogen, nitrogen and other elements in the air, generating hard and brittle compounds and brittle needle-like structures, which increase the hardness and strength of the welded joint, reduce plasticity, and significantly reduce corrosion resistance. Therefore, the molten pool, weld and heat-affected zone should be fully protected during zirconium welding. In order to completely isolate the air, the welding of zirconium materials is generally done with tungsten inert gas shielded welding. Other welding methods include: electron beam welding, plasma arc welding and resistance welding. Zirconium is generally easy to react with the atmosphere at high temperatures. It begins to absorb oxygen at 200°C, hydrogen at 300°C, and nitrogen at 400°C. The higher the temperature, the more intense the reaction. Another major problem of zirconium welding is that the weld is easy to soften too much, causing the weldment to move, and the root weld is easy to burn through. Therefore, when welding zirconium, the weldment should be properly fixed and double-sided welding should be used as much as possible. Except for titanium, niobium, silver, and vanadium, zirconium cannot be directly welded with other metals.

[0003] The existing zirconium-hafnium alloy welding technology and equipment have the following disadvantages: 1. The existing zirconium-hafnium alloy welding technology and equipment generally use a welding gun for automatic welding. When the zirconium-hafnium alloy plate is thicker, it cannot be automatically double-sided welded. It is necessary to continue welding on the back side after welding on the front side, which is very troublesome; 2. The existing zirconium-hafnium alloy welding technology and equipment are prone to excessive softening of the weld during welding, which easily causes the weldment to move. The existing zirconium-hafnium alloy clamping assembly cannot keep the center line of the zirconium-hafnium alloy metal plates of different thicknesses consistent with the center line of the double-sided welding assembly. Summary of the invention

[0004] The object of the present invention is to provide a zirconium-hafnium alloy welding device. The zirconium-hafnium alloy welding device disclosed in the present invention adopts a welding plate installed in a welding frame and driven by a first bidirectional displacement driving component. The distance between the two welding plates can be flexibly adjusted according to the thickness of the workpiece to be welded, so as to adapt to the double-sided welding of the workpieces to be welded with different thicknesses. The left and right ends of the bottom of the inner wall of the sealing box are both installed with a fixed clamping frame driven by a third bidirectional displacement driving component. Two movable side clamping plates driven by a second bidirectional displacement driving component are installed in the fixed clamping frame. The workpieces to be welded with different thicknesses can be firmly clamped and the center line of the workpiece to be welded can be kept consistent with the center line of the double-sided welding component at all times, so as to prevent dislocation during welding, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a zirconium-hafnium alloy welding device comprises a sealing box, a welding frame is installed in the middle of the top of the inner wall of the sealing box through a first electric telescopic rod, side limit plates are welded at the front and rear ends of the welding frame, a first bidirectional threaded screw driven by a first motor is rotatably installed on the inner wall of the welding frame, two welding plates are threadedly connected at the left-handed thread and the right-handed thread of the first bidirectional threaded screw through a first threaded sleeve, an infrared ranging sensor is installed on the upper part of the opposite surfaces of the welding plates, a welding gun is installed on the lower part of the opposite surfaces of the welding plates, a fixed clamping frame driven by a third bidirectional displacement driving assembly is slidably connected at the left and right ends of the lower part of the inner wall of the sealing box, the fixed clamping frame is transversely penetrated by an opening and movable side clamping plates are slidably connected on the front and rear sides of the middle inner wall, the movable side clamping plates are driven by a second bidirectional displacement driving assembly, and a movable top abutment plate driven by a second electric telescopic rod is installed on the upper part of the middle inner wall of the fixed clamping frame.

[0006] Preferably, a sealing door capable of sealing the sealing box is hingedly connected to the front opening of the sealing box.

[0007] Preferably, the air supply port on one side of the sealing box is connected to a tungsten inert gas supply device through an air valve and an air pipe.

[0008] Preferably, the second bidirectional displacement drive assembly includes a second bidirectional threaded screw rotatably mounted on the lower portion of the fixed clamp, and a power input end of the second bidirectional threaded screw is connected to a power output end of the second motor.

[0009] Preferably, the left-handed thread and the right-handed thread of the second bidirectional threaded screw are both threadedly connected with a second threaded sleeve, and the outer side wall of the second threaded sleeve is connected with a movable side clamping plate via a second sliding rod.

[0010] Preferably, the bottoms of the two movable side clamping plates are fixedly connected with second sliding rods, and the second sliding rods are slidably connected to the inner side wall of the second sliding groove opened in the middle of the lower partition of the fixed clamping frame.

[0011] Preferably, the third bidirectional displacement drive assembly includes a dustproof shell installed at the bottom of the sealing box, a third bidirectional threaded screw is rotatably installed on the inner wall of the dustproof shell, and the power input end of the third bidirectional threaded screw is connected to the power output end of the third motor.

[0012] Preferably, a third screw sleeve is threadedly connected at both the left-handed thread and the right-handed thread of the third bidirectional threaded screw, and an outer side wall of the third screw sleeve is connected to a fixed clamping frame via a bearing and a first sliding rod.

[0013] Preferably, a first sliding rod is fixedly mounted on the bottom of the two fixing clamps and is slidably connected to the inner wall of a first sliding groove opened at the bottom of the inner wall of the sealing box through the first sliding rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The zirconium-hafnium alloy welding equipment disclosed in the present invention adopts a welding plate installed in a welding frame and driven by a first bidirectional displacement driving component. The distance between the two welding plates can be flexibly adjusted according to the thickness of the workpiece to be welded, so as to adapt to the double-sided welding of workpieces with different thicknesses to be welded, and solves the problem that the existing zirconium-hafnium alloy welding technology and equipment generally adopt a welding gun for automatic welding, and when the zirconium-hafnium alloy plate is thick, automatic double-sided welding cannot be performed.

[0015] 2. The left and right ends of the bottom of the inner wall of the sealing box of the zirconium-hafnium alloy welding equipment disclosed in the present invention are both equipped with fixed clamps driven by the third bidirectional displacement drive assembly, and two movable side clamps driven by the second bidirectional displacement drive assembly are installed in the fixed clamp, which can firmly clamp workpieces of different thicknesses to be welded and keep the center line of the workpiece to be welded always consistent with the center line of the double-sided welding assembly to prevent dislocation during welding, and solve the problem that the existing zirconium-hafnium alloy welding technology and equipment are prone to excessive softening of the weld during welding, which easily leads to dislocation of the weldment, and the existing zirconium-hafnium alloy clamping assembly cannot keep the center line of the zirconium-hafnium alloy metal plates of different thicknesses consistent with the center line of the double-sided welding assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 for Figure 2 The structural diagram at A in the middle; Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the present invention.

[0017] In the figure: 1. sealing box; 2. sealing door; 3. air valve; 4. air pipe; 5. first electric telescopic rod; 6. welding frame; 7. first bidirectional threaded screw; 8. first threaded sleeve; 9. welding plate; 10. infrared ranging sensor; 11. welding gun; 12. first motor; 13. first slide groove; 14. first slide rod; 15. fixed clamping frame; 16. movable side clamping plate; 17. second motor; 18. second threaded sleeve; 19. second bidirectional threaded screw; 20. movable top plate; 21. second electric telescopic rod; 22. second slide groove; 23. second slide rod; 24. side limit plate; 25. dust cover; 26. third bidirectional threaded screw; 27. third screw rod sleeve; 28. bearing; 29. ​​third motor. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 5 , a zirconium-hafnium alloy welding device shown in the figure comprises a sealing box 1, a welding frame 6 is installed in the middle of the top of the inner wall of the sealing box 1 through a first electric telescopic rod 5, and side limit plates 24 are welded at both the front and rear ends of the welding frame 6, a first bidirectional threaded screw 7 driven by a first motor 12 is rotatably installed on the inner wall of the welding frame 6, and two welding plates 9 are threadedly connected at the left-handed thread and the right-handed thread of the first bidirectional threaded screw 7 through a first threaded sleeve 8, an infrared ranging sensor 10 is installed on the upper part of the opposite surface of the welding plate 9, and a welding gun 11 is installed on the lower part of the opposite surface of the welding plate 9, and the left and right ends of the lower part of the inner wall of the sealing box 1 are slidably connected to a fixed clamping frame 15 driven by a third bidirectional displacement driving component, the fixed clamping frame 15 is horizontally penetrated through the opening, and the front and rear sides of the middle inner wall are slidably connected to movable side clamping plates 16, and the movable side clamping plates 16 are slidably connected to the movable side clamping plates 16. The clamping plate 16 is driven by the second two-way displacement driving component, and a movable top plate 20 driven by the second electric telescopic rod 21 is installed on the upper part of the inner wall in the middle of the fixed clamping frame 15. The zirconium-hafnium alloy welding equipment disclosed in the present invention adopts a welding plate 9 installed in the welding frame 6 and driven by the first two-way displacement driving component. The distance between the two welding plates 9 can be flexibly adjusted according to the thickness of the workpiece to be welded, so as to adapt to the double-sided welding of workpieces to be welded with different thicknesses. The fixed clamping frame 15 driven by the third two-way displacement driving component is installed at both ends of the bottom of the inner wall of the sealing box 1. Two movable side clamping plates 16 driven by the second two-way displacement driving component are installed in the fixed clamping frame 15, which can firmly clamp workpieces to be welded with different thicknesses and keep the center line of the workpiece to be welded always consistent with the center line of the double-sided welding component to prevent dislocation during welding.

[0020] Furthermore, a sealing door 2 is hingedly connected at the front opening of the sealing box 1, which can seal the sealing box 1, and the sealing effect is good; further, an air supply port on one side of the sealing box 1 is connected to a tungsten inert gas supply device through an air valve 3 and an air pipe 4, and tungsten inert gas shielded welding is generally used for welding of zirconium materials; further, a second bidirectional displacement drive assembly includes a second bidirectional threaded screw 19 rotatably mounted on the lower part of the fixed clamp 15, and the power input end of the second bidirectional threaded screw 19 is connected to the power output end of the second motor 17, which is convenient for driving the movable side clamp 16 to translate; further, the left-handed thread and the right-handed thread of the second bidirectional threaded screw 19 are both threadedly connected to the second threaded sleeve 18, and the outer wall of the second threaded sleeve 18 is connected to the movable side clamp 16 through the second slide rod 23, which is convenient for transmission; further, the bottoms of the two movable side clamps 16 are fixedly connected to the second slide rod 23, and the second slide rod 23 is slidably connected to the fixed clamp The inner wall of the second slide groove 22 opened in the middle of the lower partition of the frame 15 can make the two movable side clamps 16 translate smoothly; further, the third bidirectional displacement drive assembly includes a dustproof shell 25 installed at the bottom of the sealing box 1, and a third bidirectional threaded screw 26 is rotatably installed on the inner wall of the dustproof shell 25, and the power input end of the third bidirectional threaded screw 26 is connected to the power output end of the third motor 29, which is convenient for driving the clamping assemblies at both ends to translate; further, the left-handed thread and the right-handed thread of the third bidirectional threaded screw 26 are both threadedly connected with a third screw sleeve 27, and the outer side walls of the third screw sleeve 27 are connected to the fixed clamp frame 15 through the bearing 28 and the first slide rod 14, which is convenient for transmission; further, the bottom of the two fixed clamp frames 15 are fixedly installed with the first slide rod 14 and are slidably connected to the inner wall of the first slide groove 13 opened at the bottom of the inner side wall of the sealing box 1 through the first slide rod 14, so that the two fixed clamp frames 15 can slide smoothly.

[0021] In this solution, when in use, the welding equipment for zirconium-hafnium alloy disclosed in the present invention adopts a welding plate 9 installed in a welding frame 6 and driven by a first bidirectional displacement driving assembly, and the distance between the two welding plates 9 can be flexibly adjusted according to the thickness of the workpiece to be welded, so as to adapt to the double-sided welding of workpieces with different thicknesses to be welded, and a fixed clamping frame 15 driven by a third bidirectional displacement driving assembly is installed at both left and right ends of the bottom of the inner side wall of the sealing box 1, and two movable side clamping plates 16 driven by a second bidirectional displacement driving assembly are installed in the fixed clamping frame 15, which can firmly clamp workpieces with different thicknesses to be welded. The workpieces are welded and the center line of the workpiece to be welded is always consistent with the center line of the double-sided welding assembly to prevent misalignment during welding. Before welding, the two zirconium-hafnium alloy plates to be welded are respectively inserted between the movable side clamps 16 in the fixed clamp frame 15. The external power supply is turned on by the external switch to turn on the second motor 17 and control its forward rotation. The second motor 17 drives the second bidirectional threaded screw 19 to rotate clockwise. The second thread sleeves 18 at the left-handed thread and the right-handed thread of the second bidirectional threaded screw 19 are synchronously screwed toward the middle, and the two pieces are driven by the second slide bar 23. The movable side clamping plate 16 is synchronously translated toward the middle to clamp the zirconium-hafnium alloy plate to be welded, and then the second electric telescopic rod 21 is controlled to extend, and the movable top support plate 20 is used to support the zirconium-hafnium alloy plate to be welded from the top. When the zirconium-hafnium alloy plate to be welded is too long, one end of it can be extended from the side opening of the fixed clamping frame 15. After the clamping is stable, the third two-way displacement driving component is controlled to drive the clamping components at both ends to translate toward the middle at the same time until the welding position is spliced ​​together. The principle is the same as above. Then, since the thickness of the zirconium-hafnium alloy plate to be welded has been input in advance in the external control panel, the control panel automatically The first bidirectional displacement drive assembly is automatically controlled to drive the two welding plates 9 to translate synchronously, with the same principle as above, until the infrared distance sensor 10 detects that the distance value is slightly greater than the thickness of the zirconium-hafnium alloy plate to be welded, so that the welding gun 11 is close to the welding part but not close to the welding part, which is convenient for double-sided welding. Then the first electric telescopic rod 5 can be controlled to extend to start double-sided welding (the first electric telescopic rod 5, the second electric telescopic rod 21, the infrared distance sensor 10, the first motor 12, the second motor 17 and the third motor 29 are all existing products on the market).

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding device for zirconium-hafnium alloy, comprising a sealing box (1), characterized in that: A welding frame (6) is installed in the middle of the top of the inner wall of the sealing box (1) via a first electric telescopic rod (5), and side limit plates (24) are welded to both the front and rear ends of the welding frame (6). A first bidirectional threaded screw (7) driven by a first motor (12) is rotatably installed on the inner wall of the welding frame (6), and two welding plates (9) are threadedly connected at the left-handed thread and the right-handed thread of the first bidirectional threaded screw (7) via a first threaded sleeve (8), and an infrared distance measuring sensor (10) is installed on the upper part of the opposite surface of the welding plate (9). A welding gun (11) is installed at the lower part of the opposite surface of the plate (9); the left and right ends of the lower part of the inner wall of the sealed box (1) are slidably connected to fixed clamps (15) driven by a third bidirectional displacement drive assembly; the fixed clamp (15) is horizontally penetrated by an opening and the front and rear sides of the middle inner wall are slidably connected to movable side clamps (16); the movable side clamps (16) are driven by a second bidirectional displacement drive assembly; and the upper part of the middle inner wall of the fixed clamp (15) is installed with a movable top plate (20) driven by a second electric telescopic rod (21).

2. The welding equipment of zirconium-hafnium alloy according to claim 1, characterized in that: A sealing door (2) capable of sealing the sealing box (1) is hingedly connected to the front opening of the sealing box (1).

3. The welding equipment of zirconium-hafnium alloy according to claim 2, characterized in that: The air supply port on one side of the sealing box (1) is connected to a tungsten inert gas supply device via an air valve (3) and an air pipe (4).

4. The welding equipment of zirconium-hafnium alloy according to claim 1, characterized in that: The second bidirectional displacement drive assembly comprises a second bidirectional threaded screw (19) rotatably mounted on the lower portion of the fixed clamp (15), wherein a power input end of the second bidirectional threaded screw (19) is connected to a power output end of a second motor (17).

5. The welding equipment of zirconium-hafnium alloy according to claim 4, characterized in that: The left-handed thread and the right-handed thread of the second bidirectional threaded screw rod (19) are both threadedly connected to a second threaded sleeve (18), and the outer side wall of the second threaded sleeve (18) is connected to a movable side clamping plate (16) via a second sliding rod (23).

6. The welding equipment of zirconium-hafnium alloy according to claim 5, characterized in that: The bottoms of the two movable side clamping plates (16) are fixedly connected to second sliding rods (23), and the second sliding rods (23) are slidably connected to the inner wall of a second sliding groove (22) opened in the middle of the lower partition plate of the fixed clamping frame (15).

7. The welding equipment of zirconium-hafnium alloy according to claim 1, characterized in that: The third bidirectional displacement drive assembly comprises a dustproof shell (25) mounted at the bottom of the sealing box (1), a third bidirectional threaded screw (26) being rotatably mounted on the inner side wall of the dustproof shell (25), and a power input end of the third bidirectional threaded screw (26) being connected to a power output end of a third motor (29).

8. The welding equipment of zirconium-hafnium alloy according to claim 7, characterized in that: The left-handed thread and the right-handed thread of the third bidirectional threaded screw (26) are both threadedly connected to a third screw sleeve (27), and the outer side wall of the third screw sleeve (27) is connected to a fixed clamping frame (15) via a bearing (28) and a first sliding rod (14).

9. The welding equipment of zirconium-hafnium alloy according to claim 8, characterized in that: A first sliding rod (14) is fixedly mounted on the bottom of each of the two fixed clamping frames (15) and is slidably connected to the inner wall of a first sliding groove (13) opened at the bottom of the inner wall of the sealing box (1) through the first sliding rod (14).

10. A welding technology for zirconium-hafnium alloy, characterized in that: A zirconium-hafnium alloy welding technology comprising the use of a zirconium-hafnium alloy welding device as claimed in any one of claims 1 to 9.

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