Butt welding mechanism for molybdenum metal processing

Abstract

The invention discloses a butt welding mechanism for molybdenum metal processing, and relates to the technical field of molybdenum metal processing, the butt welding mechanism for molybdenum metal processing comprises a placing plate of which the bottom is fixedly provided with a mounting frame, placing frames for placing molybdenum rods are symmetrically fixed on the placing plate along the left-right direction, and the two sides of the top of each group of placing frames are of V-shaped structures; side frames making contact with the side ends of the molybdenum rods are arranged on the two sides of the top of the containing plate in a sliding mode, sliding grooves are symmetrically formed in the two sides of the top of the containing plate in the front-back direction, and auxiliary adjusting assemblies used in cooperation with the containing frames and the side frames are arranged on the containing plate. And the machining requirements of molybdenum rods of different specifications can be flexibly met, the positioning stability and precision in the welding process can be ensured, the welding quality and the production efficiency are effectively improved, and the method is suitable for the high-precision molybdenum metal machining scene.

Description

Technical Field

[0001] The invention relates to the technical field of molybdenum metal processing, in particular to a butt welding mechanism for molybdenum metal processing. Background Art

[0002] As a strategic rare metal, molybdenum occupies an irreplaceable position in the modern industrial system due to its outstanding physical and chemical properties. Its melting point of 2620°C, among the highest among metal materials, is accompanied by excellent high-temperature strength, electrical and thermal conductivity. At room temperature, it exhibits a silvery-white metallic luster, a density of 10.2g / cm³, and exceptional hardness. These properties make it a core material in key areas such as specialty steelmaking, aerospace engine components, nuclear reactor structures, and electrodes for high-end electronic devices. For example, in the aerospace sector, molybdenum alloys are widely used in the manufacture of rocket engine nozzle throat liners due to their ability to maintain stable mechanical properties above 1600°C. In the nuclear energy sector, molybdenum-based alloys, due to their radiation resistance and corrosion resistance, are important candidates for nuclear fuel cladding. In the electronics industry, high-purity molybdenum rods, used as sputtering targets and electrode materials, directly impact the precision and stability of chip manufacturing.

[0003] Butt welding is the core process for connecting molybdenum rods, and its quality directly determines the mechanical properties and safety and reliability of the final product. For example, offset or cold welds in the butt welds of molybdenum alloy components in nuclear reactors can lead to radioactive material leakage. Insufficient weld strength in molybdenum alloy connectors in aircraft engines can cause structural failure in high-temperature and high-pressure environments, with disastrous consequences. Therefore, the positioning stability and precision control of the molybdenum rods during the butt welding process have become key bottlenecks restricting the expansion of molybdenum metal applications.

[0004] The traditional butt welding mechanism used in molybdenum metal processing has significant limitations in positioning design. The current mainstream positioning methods mostly rely on mechanical clamping structures, such as bolt-fastened V-blocks or manually adjusted chucks. Such structures have poor adaptability and cannot flexibly match molybdenum rods of different diameters and lengths. When processing molybdenum rods of different specifications, the positioning components need to be disassembled and replaced. The adjustment process is time-consuming and seriously restricts production efficiency. At the same time, the positioning accuracy of existing butt welding equipment is insufficient. The gap between the mechanical structure and the error of manual adjustment can easily cause the center axis of the molybdenum rod to deviate, and the coaxiality of the weld is reduced. In addition, the clamping force of existing butt welding equipment is uneven. Molybdenum rods are hard but brittle. Local stress concentration during mechanical clamping can easily cause microcracks. Especially in the processing of thin molybdenum rods, the occurrence of cracks will increase material loss.

[0005] In addition to mechanical positioning, some existing butt welding mechanisms use hydraulic drive to improve positioning efficiency. However, the inherent characteristics of hydraulic systems result in response lag, making dynamic compensation difficult at the moment of welding. Furthermore, hydraulic oil has poor high-temperature stability and is prone to leakage and workpiece contamination in the high-temperature environment of molybdenum butt welding. Furthermore, existing mechanisms offer a single positioning dimension, often only achieving vertical or horizontal fixation while ignoring forward and backward constraints. During welding, the molybdenum rod is susceptible to axial movement due to the arc impact and thermal stress, resulting in weld defects such as beveling or lack of fusion. Summary of the Invention

[0006] The purpose of the present invention is to provide a butt welding mechanism for molybdenum metal processing in order to solve the above problems. Through the combination of multi-directional pneumatic positioning and self-locking reinforcement, it can not only flexibly adapt to the processing requirements of molybdenum rods of different specifications, but also ensure the positioning stability and accuracy during the welding process, effectively improve the welding quality and production efficiency, and is suitable for high-precision molybdenum metal processing scenarios. See the following for details.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a butt welding mechanism for molybdenum metal processing, comprising a placing plate with a fixed mounting frame at the bottom, placing frames for placing molybdenum rods being symmetrically fixed in the left and right directions on the placing plate, both sides of the top of each group of the placing frames are V-shaped structures, side frames are slidably provided on both sides of the top of the placing plate for contacting the side ends of the molybdenum rods, sliding grooves are symmetrically provided on both sides of the top of the placing plate along the front-to-back directions, a sliding bar with the top fixed on the side frame is slidably provided in the sliding groove, an auxiliary spring is fixed on the side where the sliding bar and the inner side of the sliding groove are close to each other, and an auxiliary adjustment component for use with the placing frame and the side frame is provided on the placing plate.

[0008] Preferably, the auxiliary adjustment component includes a horizontal axis symmetrically mounted on the top of each group of placement racks and rotated along the front and rear directions, the first gear is fixed on the horizontal axis, and sliding racks are inserted on both sides of the top of the placement plate. The front and back sides of the inner cavity of the sliding rack are fixed with multiple groups of first teeth meshing with the first gear in sequence along the up and down directions. One end of each group of the horizontal axis is fixed with a pressure frame for pressing and positioning the molybdenum rod, and the front and rear groups of the pressure frames are symmetrically arranged in opposite directions. Both sides of the top of each group of the placement racks are Y-shaped structures, and the two adjacent groups of the pressure frames are adapted for use with the two sides of the top of the placement rack. The two bottom sides of the placement plate Multiple groups of cylinders are symmetrically fixed along the side in the front-to-back direction, and a piston is slidingly provided in the cylinder, the bottom end of which is fixed to the bottom of the inner cavity of the sliding frame, the top of the piston is fixed with a first spring, the top of the first spring is fixed to the top of the inner cavity of the cylinder, an air pump is fixed to the front of the bottom of the placement plate, the air outlet end of the air pump is connected to the first connecting frame, one end of the first connecting frame is connected to an I-shaped tube, the four ends of the I-shaped tube are connected to the bottom of the cylinder, and the end of the I-shaped tube close to the first connecting frame is symmetrically connected to an auxiliary solenoid valve, and a locking reinforcement structure used in conjunction with a pressure frame is provided on the placement frame.

[0009] Preferably, the auxiliary adjustment component also includes a base frame fixed to the bottom of the front and back sides of the side frame, extrusion plates are fixed on both sides of the bottom of the placement plate, and an air cylinder is embedded in the front and back sides of the base frame, and an extrusion column is slidably arranged in the air cylinder and used in conjunction with the extrusion plate, and the ends of the extrusion columns away from each other are fixed with a second spring, and one end of the second spring is fixed to the outside of the inner cavity of the air cylinder, and a pressure sensor is embedded on the side where the extrusion columns are close to each other, and the end of the first connecting frame away from the air pump and the I-shaped tube is connected to a main pipe fixed to the bottom of the placement plate through a side block, and the sides of the adjacent two groups of air cylinders away from each other are connected to a second connecting frame, and the ends of the second connecting frame away from the air cylinder are connected to the main pipe, and the end of the main pipe close to the second connecting frame is a telescopic tube structure, and the two ends of the second connecting frame close to the air cylinder are provided with a first solenoid valve, and one end of the first connecting frame is connected to the second solenoid valve, and the two ends of the main pipe are provided with a third solenoid valve.

[0010] Preferably, the locking reinforcement structure includes a T-shaped plate fixed to the front and back of each group of placement racks, and the two adjacent groups of T-shaped plates are symmetrically arranged in opposite directions, and each group of T-shaped plates is symmetrically inserted with an arc plate with one end fixed to the pressure frame, and multiple groups of second teeth are evenly fixed on the side of the arc plate away from the pressure frame, and a rotating shaft is rotatably installed on the T-shaped plate through a bearing seat, and second gears that mesh with the second teeth are fixed at both ends of the rotating shaft, an auxiliary ratchet is fixed on each group of the rotating shaft, and a groove is fixed on each group of T-shaped plates, and a pawl for use with the auxiliary ratchet is rotatably installed in the groove, and a third spring is fixed on the side of the pawl away from the auxiliary ratchet, one end of the third spring is fixed on the side wall of the groove, and a pull rod is fixed to the bottom of the pawl.

[0011] Preferably, fixed rails that slide with the sliding frame are fixed to the front and back sides of the top of the placement plate, and a block with its bottom fitted to the top of the fixed rails is fixed to the top of the sliding frame.

[0012] Preferably, a V-shaped plate for placing the side ends of the molybdenum rods is fixed on the side where the side frames are close to each other.

[0013] Preferably, a limiting rod is symmetrically fixed to the top protruding end of the piston, the bottom end of which is attached to the bottom of the inner cavity of the cylinder.

[0014] Preferably, the tops of both sides of each group of cylinders are connected to exhaust pipes.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by providing an auxiliary adjustment component and adopting a multi-directional pneumatic positioning method, the fixed state can be flexibly adjusted according to the length and diameter of the molybdenum rod to be welded. The V-shaped structures on both sides of the top of the placement frame cooperate with the pressure frames arranged symmetrically in opposite directions. The pressure frames can be pneumatically driven to swing, adapting to molybdenum rods of different diameters and achieving stable pressing in the vertical direction; the side frames can move along the sliding groove under the action of auxiliary springs, and cooperate with pneumatic extrusion positioning to push the two groups of molybdenum rods to quickly fit and keep them centered according to the length of the molybdenum rods, achieving precise horizontal constraint, and solving the problem of traditional positioning methods being single and unable to adapt to various specifications.

[0016] 2. In the auxiliary adjustment assembly, the press frame achieves stable swinging through the linkage of the horizontal shaft, the first gear, and the sliding frame. A locking reinforcement mechanism, comprised of an arc plate, second teeth, an auxiliary ratchet, and a pawl, creates a self-locking support to prevent the press frame from tilting or loosening during welding. The side frame securely holds its position after movement through pneumatic extrusion using an air cylinder, extrusion column, and extrusion plate, combined with real-time monitoring by a pressure sensor. These multi-directional constraints effectively prevent the molybdenum rod from shifting due to arc shock or thermal stress during welding, fundamentally preventing defects such as weld offset and cold welds, significantly improving welding quality.

[0017] 3. The use of pneumatic components such as air pumps, cylinders, and pistons to drive positioning offers faster response and more precise pressure regulation compared to traditional mechanical clamping or hydraulic drives. Precise control via solenoid valves allows for rapid switching between pressing the press frame and securing the side frames, reducing clamping and adjustment time. Furthermore, pneumatic operation avoids gap errors in mechanical structures and lag issues in hydraulic systems, further improving positioning accuracy and ensuring weld coaxiality and strength.

[0018] 4. Detailed designs such as the sliding limit of the sliding frame by the fixed rail, the movement constraint of the piston by the limit rod, and the timely discharge of cylinder gas by the exhaust pipe ensure the stability of the mechanism operation; the setting of elastic components such as the auxiliary spring, the first spring, and the second spring not only assists in the reset of each component, but also provides a buffer during the positioning process to avoid rigid damage to the molybdenum rod. The overall structural layout is compact, and there is no need to frequently disassemble and replace components during operation, which greatly reduces manual intervention and improves the convenience of operation and product quality consistency in mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a butt welding mechanism for molybdenum metal processing according to the present invention; Figure 2 for Figure 1 A magnified view of the structure at point A; Figure 3 This is a partial bottom view of the structure of a butt welding mechanism for molybdenum metal processing according to the present invention; Figure 4 This is a partial cross-sectional view of the structure of a butt welding mechanism for molybdenum metal processing according to the present invention; Figure 5 This is a partial three-dimensional diagram of the structure of a butt welding mechanism for molybdenum metal processing according to the present invention; Figure 6 It is a partial bottom-view cross-sectional view of the structure of the auxiliary adjustment component of the present invention; Figure 7 It is a partial bottom sectional view of the structure of the placement rack of the present invention.

[0020] Figure: 1, placement plate; 2, placement frame; 3, side frame; 4, V-shaped plate; 5, sliding groove; 6, slide bar; 7, auxiliary spring; 8, extrusion plate; 9, T-shaped plate; 10, horizontal axis; 11, first gear; 12, fixed track; 13, sliding frame; 14, first tooth; 15, pressure frame; 16, curved plate; 17, second tooth; 18, groove; 19, rotating shaft; 20, second gear; 21, auxiliary ratchet; 22, ratchet Claw; 23. Third spring; 24. Air pump; 25. First connecting frame; 26. Cylinder; 27. Piston; 28. First spring; 29. ​​Limit rod; 30. I-type pipe; 31. Auxiliary solenoid valve; 32. Second solenoid valve; 33. Main pipe; 34. Second connecting frame; 35. First solenoid valve; 36. Third solenoid valve; 37. Base frame; 38. Air cylinder; 39. Extrusion column; 40. Pressure sensor; 41. Second spring. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0022] Example See also Figure 1-7 The present invention provides a technical solution: a butt welding mechanism for molybdenum metal processing, comprising a placing plate 1 with a fixed mounting frame at the bottom, a mounting frame at the bottom of the placing frame 2 is provided with a controller, and a placing frame 2 for placing molybdenum rods is symmetrically fixed on the placing plate 1 along the left and right directions, and both sides of the top of each group of placing frames 2 are V-shaped structures, and side frames 3 are slidably provided on both sides of the top of the placing plate 1 for contacting the side ends of the molybdenum rods, and a V-shaped plate 4 for placing the side ends of the molybdenum rods is fixed on the side where the side frames 3 are close to each other, which can assist the side frames 3 to provide auxiliary support for the side ends of the molybdenum rods, thereby improving the positioning effect of the molybdenum rods. Sliding grooves 5 are symmetrically provided on both sides of the top of the placing plate 1 along the front and rear directions, and a sliding bar 6 fixed on the top end of the side frame 3 is slidably provided in the sliding groove 5, and an auxiliary spring 7 is fixed on the side where the slide bar 6 and the inner side of the inner cavity of the sliding groove 5 are close to each other. The design of the auxiliary spring 7, in conjunction with the side frame 3, can squeeze and position the side ends of the molybdenum rods, so as to perform preliminary positioning of the molybdenum rods and facilitate subsequent rapid positioning of the molybdenum rods. The placement plate 1 is provided with an auxiliary adjustment component for use with the placement rack 2 and the side rack 3. The auxiliary adjustment component includes a horizontal shaft 10 symmetrically mounted on the top of each group of placement racks 2 and rotating along the front and rear directions. A first gear 11 is fixed to the horizontal shaft 10. Slide racks 13 are inserted on both sides of the top of the placement plate 1. Fixed rails 12 that slide with the slide racks 13 are fixed on the front and back sides of the top of the placement plate 1. The top of the slide rack 13 is fixed with a block whose bottom fits on the top of the fixed rail 12. The design of the fixed rail 12 can limit the sliding of the slide rack 13, thereby improving the stability of the slide rack 13 when moving and avoiding tilting. , and the design of the block can limit the position of the sliding frame 13 to prevent it from moving downward excessively. The front and back sides of the inner cavity of the sliding frame 13 are fixed with multiple groups of first teeth 14 that mesh with the first gear 11 in sequence along the up and down directions. One end of each group of horizontal shafts 10 is fixed with a pressure frame 15 for pressing and positioning the molybdenum rod. The front and rear groups of pressure frames 15 are symmetrically arranged in opposite directions. Both sides of the top of each group of placement racks 2 are Y-shaped structures. The two adjacent groups of pressure frames 15 are adapted to the two sides of the top of the placement rack 2. Both sides of the bottom of the placement plate 1 are symmetrically fixed with multiple groups of cylinders 26 along the front and back directions. The cylinders 26 are slidably provided with a bottom end fixed on the sliding frame 13 piston 27 at the bottom of the inner cavity, the top of the piston 27 is fixed with a first spring 28, the top of the first spring 28 is fixed to the top of the inner cavity of the cylinder 26, and the tops of both sides of each group of cylinders 26 are connected with exhaust pipes, so that when the piston 27 is reset, the gas on the top of the piston 27 is discharged in time to avoid affecting the normal reset of the piston 27. The front of the bottom of the placement plate 1 is fixed with an air pump 24, and the air outlet end of the air pump 24 is connected to the first connecting frame 25. One end of the first connecting frame 25 is connected to an I-shaped pipe 30. The four ends of the I-shaped pipe 30 are connected to the bottom of the cylinder 26. The bottom end is symmetrically fixed on the protruding end of the top of the piston 27. The limiting rod 29 is fitted on the bottom of the inner cavity of the cylinder 26. The design of the limiting rod 29 can limit the downward position of the piston 27, so as to leave a spacing at the bottom of the cylinder 26 to facilitate the inflation of the interior of the I-shaped tube 30. The I-shaped tube 30 is symmetrically connected to the auxiliary solenoid valve 31 at one end close to the first connecting frame 25. The air pump 24 can be used to deliver gas to the cylinder 26, thereby changing the position of the piston 27. Therefore, with the cooperation of the sliding frame 13, the first gear 11 and the first teeth 14, the angle of the pressing frame 15 can be changed, and the molybdenum rods of different diameters can be quickly positioned in conjunction with the placement rack 2; The placement rack 2 is provided with a locking reinforcement structure for use with the pressure frame 15. The locking reinforcement structure includes a T-shaped plate 9 fixed to the front and back of each group of placement racks 2. The two adjacent groups of T-shaped plates 9 are symmetrically arranged in reverse. Each group of T-shaped plates 9 is symmetrically inserted with an arc-shaped plate 16 fixed at one end to the pressure frame 15. The arc-shaped plate 16 is evenly fixed on the side away from the pressure frame 15. A plurality of groups of second teeth 17 are evenly fixed. A rotating shaft 19 is rotatably mounted on the T-shaped plate 9 through a bearing seat. Both ends of the rotating shaft 19 are fixed with a second gear 20 that meshes with the second teeth 17. An auxiliary ratchet 21 is fixed on each group of rotating shafts 19. 9 are fixed with a groove 18, and a pawl 22 used in conjunction with the auxiliary ratchet 21 is rotatably installed in the groove 18. A third spring 23 is fixed to the side of the pawl 22 away from the auxiliary ratchet 21. One end of the third spring 23 is fixed to the side wall of the groove 18, and a pulling rod is fixed to the bottom of the pawl 22. The design of the auxiliary ratchet 21, the third spring 23, the pawl 22, the second gear 20 and the second tooth 17, together with the arc-shaped plate 16, can form an auxiliary self-locking support structure for the pressing frame 15, so as to quickly limit the position of the pressing frame 15 and prevent one end of the pressing frame 15 from easily tilting up, which affects the pressing stability of the pressing frame 15; The auxiliary adjustment component also includes a bottom frame 37 fixed to the bottom of the front and back of the side frame 3, and an extrusion plate 8 is fixed on both sides of the bottom of the placement plate 1. An air cylinder 38 is embedded in the front and back of the bottom frame 37. An extrusion column 39 used in conjunction with the extrusion plate 8 is slidably provided in the air cylinder 38. A second spring 41 is fixed to one end of the extrusion column 39 away from each other. One end of the second spring 41 is fixed to the outside of the inner cavity of the air cylinder 38. A pressure sensor 40 is embedded on the side where the extrusion columns 39 are close to each other. The first connecting frame 25 is away from the air cylinder 38. One end of the pump 24 and the I-shaped pipe 30 is connected to a main pipe 33 fixed to the bottom of the placement plate 1 through a side block. The two adjacent groups of air cylinders 38 are connected to a second connecting frame 34 on the side away from each other. The end of the second connecting frame 34 away from the air cylinder 38 is connected to the main pipe 33. The end of the main pipe 33 close to the second connecting frame 34 is a telescopic pipe structure. The two ends of the second connecting frame 34 close to the air cylinder 38 are both provided with a first solenoid valve 35. One end of the first connecting frame 25 is connected to the second solenoid valve 32. Both ends of the main pipe 33 are provided with The third solenoid valve 36, the second solenoid valve 32 and the third solenoid valve 36 are designed to quickly discharge the gas in the cylinder 26 and the air cylinder 38, and with the cooperation of the first spring 28 and the second spring 41, the auxiliary piston 27 and the extrusion column 39 can be quickly reset. By setting up an auxiliary adjustment component, the two adjacent groups of pressure frames 15 can be driven pneumatically to swing downward synchronously, and cooperate with the placement rack 2 with a V-shaped structure on both sides of the top to quickly position the molybdenum rod according to the size of the molybdenum rod, and the auxiliary spring 7 can be used to drive the side frame 3 to move inward, so as to push the two groups of molybdenum rods to quickly fit together and be in a centered state according to the length of the molybdenum rod. At the same time, the side frame 3 can be quickly positioned by pneumatic extrusion after moving, so that the side end of the molybdenum rod can be quickly fixed. At this time, a multi-directional pneumatic positioning method is adopted, and the length and diameter of the welding molybdenum rod can be quickly and stably fixed in multiple directions according to the needs, so as to avoid the molybdenum rod from easily moving during the welding process, and avoid weld offset or cold welding, and the pneumatic method has higher accuracy.

[0023] Working principle: The user pulls the side frame 3 in advance to stretch the auxiliary spring 7, and then the user places the two groups of molybdenum rods to be welded on the two groups of placement frames 2 respectively. The top two sides of the placement frame 2 are designed in a V-shaped structure, which can adapt to molybdenum rods of different sizes. At this time, the elastic rebound of the auxiliary spring 7 can be used to drive the side frame 3 to move inward and perform preliminary extrusion and positioning on the molybdenum rods. At this time, the two groups of molybdenum rods are fitted to each other and are in a centered state on the placement plate 1. Then the user turns on the air pump 24 through the controller. , auxiliary solenoid valve 31 and first solenoid valve 35, at this time, the air pump 24 delivers the gas to the I-shaped pipe 30 and the main pipe 33 through the first connecting frame 25, and then the main pipe 33 delivers the gas to the second connecting frame 34, and then to the multiple groups of gas cylinders 38, which can push the extrusion column 39 to move inward and fit on the extrusion plate 8. At this time, the pressure sensor 40 can monitor the pressure value in real time. When the value reaches the preset value, the corresponding first solenoid valve 35 is closed in time. At this time, the bottom frame 37 can be quickly opened by pressing the extrusion column 39. The V-shaped plate 4 provides auxiliary support for the side end of the molybdenum rod, and the I-shaped tube 30 delivers gas to multiple groups of cylinders 26, thereby pushing the piston 27 upward, thereby driving the sliding frame 13 to move upward synchronously. At this time, the first tooth 14 on the sliding frame 13 is engaged with the first gear 11, thereby driving the first gear 11 to rotate, thereby driving the pressure frame 15 to swing downward, and pressing the top of the molybdenum rod to position, and the auxiliary ratchet 21, the third spring 23, the pawl 22, the second gear 20 and the second tooth 17, and the arc plate 16, can form an auxiliary support structure for the pressure frame 15, thereby improving the pressing stability of the pressure frame 15. At this time, a multi-directional pneumatic positioning method is adopted, and the length and diameter of the molybdenum rod to be welded can be quickly and stably fixed in multiple directions according to the needs, thereby avoiding the position movement of the molybdenum rod during welding, avoiding weld offset or cold welding, and the pneumatic method has higher accuracy.

[0024] However, as is well known to those skilled in the art, the working principles and wiring methods of the air pump 24 and the controller are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0025] In the present invention, by providing an auxiliary adjustment component and adopting a multi-directional pneumatic positioning method, the fixed state can be flexibly adjusted according to the length and diameter of the molybdenum rod to be welded. The V-shaped structure on both sides of the top of the placement frame 2 cooperates with the pressure frame 15 set symmetrically in opposite directions. The pressure frame 15 can be swung by pneumatic drive to adapt to molybdenum rods of different diameters and achieve stable pressing in the up and down directions; the side frame 3 can move along the sliding groove 5 under the action of the auxiliary spring 7. With the help of pneumatic extrusion positioning, it can push the two groups of molybdenum rods to quickly fit and keep them centered according to the length of the molybdenum rods, achieving precise horizontal constraint, solving the problem that the traditional positioning method is single and cannot adapt to various specifications.

[0026] In the auxiliary adjustment assembly, the press frame 15 achieves stable swinging through the linkage of the transverse shaft 10, the first gear 11, and the sliding frame 13. A locking and reinforcement mechanism, formed in conjunction with the curved plate 16, the second teeth 17, the auxiliary ratchet 21, and the pawl 22, creates a self-locking support, preventing the press frame 15 from tilting or loosening during welding. The side frame 3 securely holds its position after movement through pneumatic compression using the air cylinder 38, the extrusion column 39, and the extrusion plate 8, combined with real-time monitoring by the pressure sensor 40. These multi-directional constraints effectively prevent the molybdenum rod from shifting due to arc shock or thermal stress during welding, fundamentally preventing defects such as weld offset and cold welds, significantly improving welding quality.

[0027] The use of pneumatic components, including an air pump 24, cylinder 26, and piston 27, to drive positioning offers faster response and more precise pressure regulation compared to traditional mechanical clamping or hydraulic drives. Precise solenoid valve control allows for rapid switching between pressing the press frame 15 and securing the side frame 3, reducing clamping and adjustment time. Furthermore, pneumatic operation avoids gap errors in mechanical structures and hysteresis in hydraulic systems, further improving positioning accuracy and ensuring weld coaxiality and strength.

[0028] The detailed designs such as the sliding limit of the sliding frame 13 by the fixed rail 12, the movement constraint of the piston 27 by the limit rod 29, and the timely discharge of gas from the cylinder 26 by the exhaust pipe ensure the stability of the mechanism operation; the setting of elastic components such as the auxiliary spring 7, the first spring 28, and the second spring 41 not only assists in the reset of each component, but also provides a buffer during the positioning process to avoid rigid damage to the molybdenum rod. The overall structural layout is compact, and there is no need to frequently disassemble and replace components during operation, which greatly reduces manual intervention and improves the convenience of operation and product quality consistency in mass production.

[0029] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A butt welding mechanism for molybdenum metal processing, comprising a placement plate (1) with a bottom fixed mounting frame, characterized in that: The placement plate (1) is symmetrically fixed with placement racks (2) for placing molybdenum rods in the left-right direction. Both sides of the top of each group of the placement racks (2) are V-shaped structures. Side racks (3) that contact the side ends of the molybdenum rods are slidably provided on both sides of the top of the placement plate (1). Sliding grooves (5) are symmetrically provided on both sides of the top of the placement plate (1) in the front-back direction. A sliding bar (6) with the top fixed on the side rack (3) is slidably provided in the sliding groove (5). An auxiliary spring (7) is fixed on the side of the sliding bar (6) and the inner side of the sliding groove (5) that are close to each other. The placement plate (1) is provided with an auxiliary adjustment component used in conjunction with the placement rack (2) and the side rack (3).

2. A butt welding mechanism for molybdenum metal processing according to claim 1, characterized in that: The auxiliary adjustment component includes a transverse shaft (10) symmetrically rotated along the front-back direction and mounted on the top of each group of placement racks (2), a first gear (11) is fixed on the transverse shaft (10), and sliding racks (13) are inserted on both sides of the top of the placement plate (1), and the front and back sides of the inner cavity of the sliding rack (13) are fixed with multiple groups of first teeth (14) meshing with the first gear (11) in sequence along the up-down direction, and one end of each group of the transverse shaft (10) is fixed with a pressing frame (15) for pressing and positioning the molybdenum rod, and the front and rear groups of the pressing frames (15) are symmetrically arranged in opposite directions, and the two sides of the top of each group of the placement racks (2) are Y-shaped structures, and the adjacent two groups of the pressing frames (15) are adapted to be used with the two sides of the top of the placement rack (2), and the two sides of the bottom of the placement plate (1) are symmetrically fixed with multiple groups of A cylinder (26) is provided with a piston (27) whose bottom end is fixed to the bottom of the inner cavity of the sliding frame (13) and is slidingly provided in the cylinder (26). A first spring (28) is fixed to the top of the piston (27). The top of the first spring (28) is fixed to the top of the inner cavity of the cylinder (26). An air pump (24) is fixed to the front of the bottom of the placement plate (1). The air outlet end of the air pump (24) is connected to the first connecting frame (25). One end of the first connecting frame (25) is connected to an I-shaped tube (30). The four ends of the I-shaped tube (30) are connected to the bottom of the cylinder (26). One end of the I-shaped tube (30) close to the first connecting frame (25) is symmetrically connected to an auxiliary solenoid valve (31). The placement frame (2) is provided with a locking reinforcement structure used in conjunction with the pressure frame (15).

3. The butt welding mechanism for molybdenum metal processing according to claim 2, characterized in that: The auxiliary adjustment component also includes a bottom frame (37) fixed to the bottom of the front and back of the side frame (3), and an extrusion plate (8) is fixed on both sides of the bottom of the placement plate (1). An air cylinder (38) is embedded in the front and back of the bottom frame (37), and an extrusion column (39) used in conjunction with the extrusion plate (8) is slidably provided in the air cylinder (38). A second spring (41) is fixed to one end of the extrusion column (39) away from each other, and one end of the second spring (41) is fixed to the outside of the inner cavity of the air cylinder (38). A pressure sensor (40) is embedded on the side of the extrusion column (39) close to each other. The first connecting frame (25) is away from the air pump (24). One end of the I-shaped tube (30) is connected to a main pipe (33) fixed to the bottom of the placement plate (1) through a side block, and the sides of the two adjacent groups of gas cylinders (38) away from each other are connected to a second connecting frame (34), and one end of the second connecting frame (34) away from the gas cylinder (38) is connected to the main pipe (33), and one end of the main pipe (33) close to the second connecting frame (34) is a telescopic tube structure. Both ends of the second connecting frame (34) close to the gas cylinder (38) are provided with a first solenoid valve (35), one end of the first connecting frame (25) is connected to a second solenoid valve (32), and both ends of the main pipe (33) are provided with a third solenoid valve (36).

4. The butt welding mechanism for molybdenum metal processing according to claim 2, characterized in that: The locking reinforcement structure includes a T-shaped plate (9) fixed on the front and back of each group of placement racks (2), and two adjacent groups of T-shaped plates (9) are symmetrically arranged in opposite directions. An arc-shaped plate (16) with one end fixed on the pressure frame (15) is symmetrically inserted on each group of T-shaped plates (9), and a plurality of groups of second teeth (17) are evenly fixed on the side of the arc-shaped plate (16) away from the pressure frame (15). A rotating shaft (19) is rotatably mounted on the T-shaped plate (9) through a bearing seat, and both ends of the rotating shaft (19) are fixed with a second tooth (17). 7) A second gear (20) meshing with each other, an auxiliary ratchet (21) is fixed on each set of the rotating shafts (19), a groove (18) is fixed on each set of the T-shaped plates (9), a pawl (22) for use with the auxiliary ratchet (21) is rotatably mounted in the groove (18), a third spring (23) is fixed on the side of the pawl (22) away from the auxiliary ratchet (21), one end of the third spring (23) is fixed on the side wall of the groove (18), and a pulling rod is fixed to the bottom of the pawl (22).

5. The butt welding mechanism for molybdenum metal processing according to claim 2, characterized in that: Fixed rails (12) that slide in cooperation with the sliding frame (13) are fixed to the front and back sides of the top of the placement plate (1), and a block with a bottom that fits on the top of the fixed rails (12) is fixed to the top of the sliding frame (13).

6. The butt welding mechanism for molybdenum metal processing according to claim 1, characterized in that: A V-shaped plate (4) for placing the side ends of the molybdenum rods is fixed on one side of the side frames (3) that are close to each other.

7. The butt welding mechanism for molybdenum metal processing according to claim 2, characterized in that: A limiting rod (29) is symmetrically fixed to the top protruding end of the piston (27), the bottom end of which is attached to the bottom of the inner cavity of the cylinder (26).

8. The butt welding mechanism for molybdenum metal processing according to claim 2, characterized in that: The tops of both sides of each group of cylinder barrels (26) are connected to exhaust pipes.

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