Automatic metal piece welding system

Abstract

The present application relates to metal piece welding technical field, especially a kind of metal piece automatic welding system;Including rack;Rotary mounting has tray on rack, fixed plate is installed on the upper end of rack by support column, and limit mechanism is equipped on fixed plate, and fixed mechanism is equipped on tray;The present application solves the problem that welding displacement and rotation are not synchronized through the linkage design of fixed mechanism and limit mechanism.Synchronous trigger sliding ring in fixed mechanism when lower pressing plate moves down, and extruding piece clamping support plate is driven through connecting rod, and positioning block expands radially to support and adjust support plate and screw under the action of guide piece;Linkage part in limit mechanism drives limit block extruding nut and forms two-way constraint with upper end face of rotary disc;Reinforcing part synchronously implements radial support to middle part of screw and presses down support plate to limit vertical displacement.Three linkage eliminates the displacement problem of component caused by high-temperature expansion and vibration, ensures that welding position is accurate and fusion zone thickness is uniform.

Description

Technical Field

[0001] This invention relates to the field of metal welding technology, and in particular to an automatic metal welding system. Background Technology

[0002] Hollow top supports are key adjustment devices used in construction engineering for scaffolding and formwork support. They consist of a U-shaped support plate with through holes, a nut, and a hollow threaded rod. Height adjustment and load transfer are achieved through the rotation of the hollow threaded rod. The support plate and the threaded rod are welded together using a semi-automatic cyclic process. The specific welding process is as follows: the pre-jointed support plate and threaded rod are placed on a rotatable disc fixture. The support plate is fixed in position by a rectangular slot, and the threaded rod is flexibly pressed by a spring mechanism to maintain axial alignment. After the disc rotates to the welding station in a rhythmic pattern, the welding machine welds at the contact point to form an initial weld point for temporary fixation. Subsequently, the top support is driven to rotate synchronously, completing continuous welding along the annular contact surface. After welding is completed, the disc rotates to the unloading station, where the top support is manually removed, and the process is repeated.

[0003] Currently, the following problems exist in the welding process of hollow top supports: In traditional welding, the support plate and the screw are fixed by baffles and springs. The high temperature during welding causes the material to expand, while the vibration and rotational inertia during welding cause the components to have slight displacements, resulting in welding position deviation, uneven thickness of the fusion zone, and the formation of weak points. At the same time, in the passive rotation mode of a single drive shaft, the difference in rotational inertia between the screw and the support plate and the assembly gap can easily cause asynchronous rotation, resulting in weld trajectory deviation, discontinuous molten pool, and local overheating deformation, thereby reducing the welding strength.

[0004] Therefore, during the welding process, the offset caused by thermal expansion and vibration, as well as the asynchronous rotation caused by the difference in driving inertia, resulting in weld trajectory deviation, uneven fusion zone and reduced structural strength, are technical problems that need to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the above problems, this application provides an automatic welding system for metal parts to solve the aforementioned technical problems.

[0006] To achieve the above objectives, the present application provides the following technical solution: an automatic metal welding system, comprising a frame; a tray is rotatably mounted on the frame, a fixed plate is mounted on the upper end of the frame via a support column, a limiting mechanism is provided on the fixed plate, and a fixing mechanism is provided on the tray; the fixing mechanism includes a guide member, two sets of extrusion members slidably mounted on the tray, a column is coaxially fixedly mounted on the tray, a slip ring is slidably sleeved on the column, a connecting rod is hinged between the slip ring and the extrusion member, a positioning block is uniformly slidably mounted on the upper end of the slip ring along its circumference, and a reinforcing part is provided on the support column; the limiting mechanism includes a rotating mechanism rotatably mounted on the upper end of the fixed plate and coaxial with the tray. The disc, fixed plate, and turntable are all equipped with U-shaped grooves. Two pairs of symmetrical limiting blocks are slidably installed on the upper end of the turntable. A lower pressure plate is set above the fixed plate. A linkage is set between the lower pressure plate and the turntable. A drive component for synchronous rotation is set between the lower pressure plate and the tray. The lower pressure plate presses the screw to move down. The screw pushes the slip ring to move down through the tray. During this process, the positioning block moves radially under the action of the guide component to synchronously provide internal support and alignment for the tray and the screw. The slip ring drives the extrusion component to clamp the tray through the connecting rod. At the same time, the limiting block squeezes the limiting nut through the linkage component. The reinforcement part also moves down with the lower pressure plate to synchronously support the middle of the limiting screw and press the upper end of the tray.

[0007] As a preferred embodiment, the guide includes slots on the column that correspond one-to-one with the positioning blocks. A connecting plate is fixedly installed at the end of the positioning block near the center of the column. The connecting plate slides into the corresponding slot. The inner wall of the slot has an inclined groove that slopes from top to bottom away from the center of the column. A guide post that cooperates with the inclined groove is fixedly installed on the connecting plate. A compression spring sleeved on the column is fixedly installed between the lower end of the slip ring and the tray.

[0008] As a preferred embodiment, the driving component includes a lifting plate disposed above a fixed plate, the fixed plate being located above a tray, a lower pressure plate being rotatably mounted on the lifting plate, a rotating shaft being rotatably mounted on a frame, a spline shaft being mounted after the upper end of the rotating shaft rotatably passes through the fixed plate, a spline sleeve being slidably sleeved on the spline shaft, and the upper end of the spline sleeve rotatably passing through the lifting plate.

[0009] As a preferred embodiment, the reinforcement includes a support plate fixedly installed on the support column and located directly below the fixed plate. The support plate also has a U-shaped groove. Two shaft plates symmetrical about the U-shaped groove are fixedly installed on the upper end of the support plate. A reinforcement block is slidably installed on one end of the shaft plate near the U-shaped groove via a pair of sliding rods. A tension spring is sleeved on the sliding rod. An actuator for pushing the reinforcement block to move and pressing down the support plate is provided on the lifting plate.

[0010] As a preferred embodiment, the reinforcement unit further includes an actuator on the lifting plate for pushing the reinforcement block to move and pressing down the support plate. The actuator includes an inclined block that is fixedly installed at the end of each pair of sliding rods away from the reinforcement block. The inclined block is slidably connected to the upper end of the support plate. Two pairs of left-right symmetrical push-pull rods are fixedly installed at the lower end of the lifting plate. After the lower end of each pair of push-pull rods slides through the fixed plate and the support plate in sequence, a pressure plate for pressing down the support plate is fixedly installed. A pushing block for pushing the inclined block to move is fixedly installed on each pair of push-pull rods.

[0011] As a preferred embodiment, the extrusion component includes two symmetrical extrusion blocks. In each set of extrusion components, the extrusion block near the slip ring is hinged to the corresponding connecting rod. A pair of connecting plates are fixedly installed between the extrusion blocks on the right side of the two sets of extrusion components, and a pair of connecting plates are also installed between the other two extrusion blocks.

[0012] As a preferred embodiment, the spline sleeve and the lower pressure plate, as well as the rotating shaft and the tray, are connected by belt drive. A motor with an output shaft connected to the rotating shaft is fixedly installed on the frame. A cylinder is fixedly installed at the lower end of the fixed plate. The telescopic section of the cylinder slides through the fixed plate and is fixedly connected to the lifting plate.

[0013] As a preferred embodiment, the linkage includes a tension spring installed on the opposite ends of each pair of limit blocks, the other end of the tension spring being fixedly connected to the turntable via a vertical plate, the upper end of the limit block having an inclined surface and the paired inclined surfaces forming a V-shaped structure, and the lower end of the pressure plate having an extrusion groove that corresponds to and cooperates with the limit blocks.

[0014] As a preferred embodiment, two symmetrical connecting columns are fixedly installed at the lower end of the pressure plate, and the lower ends of the connecting columns are slidably inserted into the turntable.

[0015] As a preferred embodiment, two symmetrical pre-fixed plates are fixedly installed on the upper end of the tray, and the extrusion component is located between the pre-fixed plates.

[0016] The above-described one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: 1. The present invention solves the problem of asynchronous welding displacement and rotation through the linkage design of the fixing mechanism and the limiting mechanism. When the pressure plate moves down, the slip ring in the fixing mechanism is triggered synchronously, and the extrusion component is driven by the connecting rod to clamp the support plate. At the same time, the positioning block expands radially under the action of the guide to support and align the support plate and the screw. The linkage component in the limiting mechanism drives the limiting block to squeeze the nut and cooperates with the upper end face of the turntable to form a bidirectional constraint. The reinforcement part simultaneously provides radial support to the middle part of the screw and presses down the support plate to limit vertical displacement. The linkage of the three eliminates the component displacement problem caused by high temperature expansion and vibration, ensuring accurate welding position and uniform thickness of the fusion zone.

[0017] II. This invention effectively suppresses welding vibration displacement through a multi-level constraint design of the fixing mechanism. The positioning block expands radially as the slip ring moves downwards, simultaneously pressing against the inner wall of the through-hole of the support plate and the inner wall of the lower end of the screw to achieve coaxial positioning; the extrusion component moves in opposite directions via a connecting rod to clamp the vertical section of the support plate; the reinforcement part continuously presses against the upper surface of the support plate to limit axial movement. This triple constraint eliminates micro-displacements caused by high temperature and vibration, avoiding weak points formed by weld misalignment and uneven fusion.

[0018] Third, this invention achieves dual active synchronous rotation through the cooperation of the driving component and the limiting mechanism. Simultaneously, the limiting block clamps the nut, transmitting torque to enable the nut to actively drive the screw; the support plate and the screw rotate at the same speed under the action of the two driving points. This eliminates the asynchronous problems caused by differences in rotational inertia and assembly gaps, avoiding weld trajectory deviation, discontinuous molten pool, and localized overheating deformation.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the welding and processing of the top support according to the present invention.

[0022] Figure 2 This is a schematic diagram of the structure of the driving component of the present invention.

[0023] Figure 3 This is a schematic diagram of the structure of the column, positioning block and guide of the present invention.

[0024] Figure 4 This is a schematic diagram of the connecting plate, inclined groove, guide post and compression spring of the present invention.

[0025] Figure 5 This is a schematic diagram of the structure of the turntable, limiting block and pressure plate of the present invention.

[0026] Figure 6 This is a schematic diagram of the structure of the pressure plate, connecting column and turntable of the present invention.

[0027] Reference numerals: 10. Frame; 11. Pallet; 110. Pre-fixed plate; 12. Fixed plate; 2. Fixing mechanism; 20. Column; 21. Slip ring; 22. Connecting rod; 23. Positioning block; 24. Extrusion part; 240. Extrusion block; 241. Connecting plate; 25. Guide part; 250. Connecting plate; 251. Inclined groove; 252. Guide column; 253. Compression spring; 3. Limiting mechanism; 30. Turntable; 31. Limiting block; 32. Lower pressure plate; 320. Connecting column; 4. Driving part; 40. Lifting plate; 41. Rotating shaft; 42. Splined shaft; 43. Splined sleeve; 5. Motor; 6. Cylinder; 7. Reinforcing part; 70. Support plate; 71. Reinforcing block; 72. Tension spring; 8. Actuating part; 80. Inclined block; 81. Push-pull rod; 82. Pressure plate; 83. Push block. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] like Figure 1 and Figure 2 As shown, an automatic metal welding system includes a frame 10; a tray 11 is rotatably mounted on the frame 10, and a fixing plate 12 located above the tray 11 is mounted on the upper end of the frame 10 via a support column. A limit mechanism 3 is provided on the fixing plate 12, a fixing mechanism 2 is provided on the tray 11, and a reinforcing part 7 is provided on the support column.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, the fixing mechanism 2 includes two sets of extrusion members 24 that are slidably installed on the upper end of the tray 11. A column 20 is coaxially fixedly installed on the tray 11. A slip ring 21 is slidably sleeved on the column 20. A connecting rod 22 is hinged between the slip ring 21 and the extrusion member 24. A positioning block 23 is slidably installed on the upper end of the slip ring 21 along its circumference. When the slip ring 21 moves, the positioning block 23 is driven to slide radially through the guide member 25.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, the limiting mechanism 3 includes a turntable 30 rotatably mounted on the upper end of the fixed plate 12 and coaxial with the tray 11. Both the fixed plate 12 and the turntable 30 have U-shaped grooves. Two pairs of symmetrical limiting blocks 31 are slidably mounted on the upper end of the turntable 30. A lower pressure plate 32 is positioned above the fixed plate 12. A linkage component is provided between the lower pressure plate 32 and the turntable 30 to drive the limiting blocks 31 to move. The lower pressure plate 32 and the tray 11 rotate synchronously through a driving component 4. The rotatable connection between the turntable 30 and the fixed plate 12 is larger than half a circle, and the ends of the U-shaped grooves are chamfered. The larger-than-half-circle connection ensures that the turntable 30 maintains its connection with the fixed plate 12 during rotation, allowing for stable rotation. The chamfering ensures smooth passage of the turntable 30 through the U-shaped grooves.

[0032] like Figure 1 , Figure 2 and Figure 3 As shown, two symmetrical pre-fixing plates 110 are fixedly installed on the upper end of the tray 11, and the extrusion member 24 is located between the pre-fixing plates 110. The area between the two pre-fixing plates 110 is in clearance fit with the tray, and the pre-fixing plates 110 can pre-fix the tray, which is convenient for the subsequent extrusion and fixing of the extrusion member 24. In addition, the clearance fit makes it easy to pick up and put down the tray, thereby reducing the difficulty of operation and improving the processing efficiency.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, during actual operation, the pallet is placed upside down between the two pre-fixed plates 110, with the column 20 passing through the through hole on the pallet. The inner surface of the horizontal section of the pallet abuts against the upper end face of the slip ring 21, and the vertical section of the pallet is located inside the corresponding extrusion piece 24. Then, the screw is moved from top to bottom and fitted onto the column 20, abutting against the outer surface of the horizontal section of the pallet. The nut moves with the screw from a position higher than the limit block 31 to between the pair of limit blocks 31 and contacts the upper end of the turntable 30.

[0034] Then, the driving component 4 drives the lower pressure plate 32 to move downward. The lower pressure plate 32 abuts against the upper end of the screw and pushes the screw downward. The screw then pushes the slip ring 21 downward through the support plate. The slip ring 21 drives the positioning block 23 to move radially through the guide component 25 to abut against the inner wall of the through hole of the support plate and the inner wall of the lower end of the screw, so as to position the support plate and the screw coaxially. At the same time, the downward movement of the slip ring 21 will also cause the pressing component 24 to press the support plate through the connecting rod 22, so as to completely straighten and fix the support plate. At this time, the lower end face of the vertical section of the support plate abuts against the upper end face of the tray 11, the nut abuts against the upper end face of the turntable 30, and the reinforcing part 7 also presses and supports the middle part of the screw synchronously as the lower pressure plate 32 moves downward, and pushes and limits the support plate downward in real time. In addition, when the lower pressure plate 32 moves downward, it will also cooperate with the linkage component to drive the pair of limit blocks 31 to move synchronously to press and limit the nut.

[0035] Subsequently, the driving component 4 drives the lower pressure plate 32 and the tray 11 to rotate synchronously. The lower pressure plate 32 drives the turntable 30 and the nut to rotate synchronously through the limiting block 31. Because the lower pressure plate 32 no longer moves down and the nut is in the combined restriction of the turntable 30 and the limiting block 31, the nut will drive the screw to rotate together, so that the tray and the screw rotate at the same speed to ensure the welding quality. Then, the welding mechanism installed on the frame 10 is used to weld the connection between the screw and the tray. The welding mechanism is existing technology, and its specific structure will not be described in detail in this invention. The welding mechanism is also not shown in the drawings.

[0036] like Figure 3 and Figure 4 As shown, the guide 25 includes a slot, and the column 20 has slots that correspond one-to-one with the positioning blocks 23. A connecting plate 250 is fixedly installed at one end of the positioning block 23 near the center of the column 20. The connecting plate 250 slides into the corresponding slot. The inner wall of the slot has an inclined groove 251 that slopes from top to bottom away from the center of the column 20. A guide post 252 that cooperates with the inclined groove 251 is fixedly installed on the connecting plate 250. A compression spring 253 sleeved on the column 20 is fixedly installed between the lower end of the slip ring 21 and the tray 11.

[0037] like Figure 2 , Figure 3 and Figure 4 As shown, the extrusion component 24 includes two left and right symmetrical extrusion blocks 240. In each set of extrusion components 24, the extrusion block 240 near the slip ring 21 is hinged to the corresponding connecting rod 22. A pair of connecting plates 241 are fixedly installed between the extrusion blocks 240 on the right side of the two sets of extrusion components 24, and a pair of connecting plates 241 are also installed between the other two extrusion blocks 240.

[0038] like Figure 2 , Figure 3 and Figure 4As shown, during actual operation, as the slip ring 21 moves downward, it will drive the positioning block 23 and the connecting plate 250 to move downward. At this time, the compression spring 253 is compressed, and the connecting plate 250 drives the positioning block 23 to move downward and radially away from the center of the column 20 through the cooperation of the guide post 252 and the inclined groove 251, until the positioning block 23 abuts against the inner wall of the lower end of the screw and the inner wall of the through hole of the support plate. At the same time, the downward movement of the slip ring 21 will also push the corresponding pressing block 240 to move through the connecting rod 22. The two pressing blocks 240 with hinged connection move away from each other, and the two moving pressing blocks 240 drive their respective corresponding pressing blocks 240 to move towards the support plate through the connecting plate 241, so that the two pressing blocks 240 in the same group move towards each other to press, straighten and fix the vertical section of the support plate.

[0039] After welding is completed, the lower pressure plate 32 moves upward away from the screw, and the slip ring 21 is no longer pushed. At this time, the formed top support can be removed manually. During the removal of the top support, the compression spring 253 will drive the positioning block 23 to move upward through the slip ring 21, and with the cooperation of the inclined groove 251 and the guide post 252, the positioning block 23 will move towards the center of the column 20 to release the resistance to the screw and the support plate. At the same time, the slip ring 21 drives the pressing block 240 through the connecting rod 22 to release the pressure on the support plate, preparing for the next fixing.

[0040] like Figure 2 , Figure 5 and Figure 6 As shown, the linkage includes a tension spring installed on the opposite ends of each pair of limit blocks 31. The other end of the tension spring is fixedly connected to the turntable 30 through a vertical plate. The upper end of the limit block 31 is provided with an inclined surface, and the pairs of inclined surfaces form a regular V-shaped structure. The lower end of the pressure plate 32 is provided with an extrusion groove that corresponds to and cooperates with the limit blocks 31.

[0041] like Figure 1 , Figure 2 and Figure 5 As shown, the driving component 4 includes a lifting plate 40. The lifting plate 40 is provided above the fixed plate 12. The lower pressure plate 32 is rotatably mounted on the lifting plate 40. A rotating shaft 41 is rotatably mounted on the frame 10. The upper end of the rotating shaft 41 rotates through the fixed plate 12 and is then mounted with a splined shaft 42. A splined sleeve 43 is slidably sleeved on the splined shaft 42. The upper end of the splined sleeve 43 rotates through the lifting plate 40.

[0042] like Figure 2 and Figure 5 As shown, the spline sleeve 43 and the lower pressure plate 32, as well as the rotating shaft 41 and the tray 11, are all connected by belt drive. A motor 5 with an output shaft connected to the rotating shaft 41 is fixedly installed on the frame 10. A cylinder 6 is fixedly installed at the lower end of the fixed plate 12. The telescopic section of the cylinder 6 slides through the fixed plate 12 and is fixedly connected to the lifting plate 40.

[0043] like Figure 5 and Figure 6 As shown, two symmetrical connecting columns 320 are fixedly installed at the lower end of the pressure plate 32, and the lower ends of the connecting columns 320 are slidably inserted into the turntable 30.

[0044] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, during actual operation, cylinder 6 pulls lifting plate 40 downward, lifting plate 40 drives lower pressure plate 32 downward, lower pressure plate 32 pushes screw and support plate downward and fixes screw and support plate through fixing mechanism 2. When nut abuts against the upper end of turntable 30, turntable 30 restricts nut from moving downward. When the lower pressure plate 32 moves down, it will also push the pair of limit blocks 31 closer together through the cooperation of the extrusion groove and the inclined surface of the limit block 31 to squeeze and limit the nut. At this time, the tension spring is stretched, the connecting column 320 is inserted into the turntable 30, and then the motor 5 drives the rotating shaft 41 to rotate. The rotating shaft 41 drives the tray 11 to rotate through the belt. At the same time, it drives the lower pressure plate 32 to rotate through the spline shaft 42, spline sleeve 43 and belt. The lower pressure plate 32 drives the nut and the turntable 30 to rotate synchronously through the limit block 31 and the connecting column 320. The nut will drive the screw to rotate. Through the active rotation of the upper and lower two points, it avoids relying solely on the nut to drive the screw and tray 11 to rotate, thereby helping to ensure the quality and effectiveness of the threaded connection between the nut and the screw, as well as the stability of the synchronous rotation of the tray and the screw.

[0045] After welding is completed, cylinder 6 pushes lifting plate 40 upward and moves lower pressure plate 32 away from screw. Fixing mechanism 2 releases the fixation of support plate and screw, while limit block 31 moves away from nut under the action of tension spring. After lifting plate 40 moves upward and fully resets, the forming top support is removed.

[0046] like Figure 1 , Figure 2 and Figure 5 As shown, the reinforcement part 7 includes a support plate 70 fixedly installed on the support column and located directly below the fixing plate 12. The support plate 70 also has a U-shaped groove. Two shaft plates symmetrical about the U-shaped groove are fixedly installed on the upper end of the support plate 70. A reinforcement block 71 is slidably installed on one end of the shaft plate near the U-shaped groove through a pair of sliding rods. Tension springs 72 are sleeved on the sliding rods and connected to the shaft plate and the reinforcement block 71 at both ends respectively.

[0047] like Figure 1 , Figure 2 and Figure 5As shown, the reinforcement part 7 also includes an actuator 8 on the lifting plate 40 for pushing the reinforcement block 71 to move and pressing down the support plate. The actuator 8 includes an inclined block 80 that is fixedly installed at the end of each pair of sliding rods away from the reinforcement block 71. The inclined block 80 is slidably connected to the upper end of the support plate 70, and the inclined block 80 has a right-angled triangular structure with the inclined surface facing upward and facing away from the corresponding shaft plate. Two pairs of left and right symmetrical push-pull rods 81 are fixedly installed at the lower end of the lifting plate 40. After the lower end of each pair of push-pull rods 81 slides through the fixed plate 12 and the support plate 70 in sequence, a pressure plate 82 for pressing down the support plate is fixedly installed. A pushing block 83 for pushing the inclined block 80 to move is fixedly installed on each pair of push-pull rods 81. The pressure plate 82 and the support plate, and the reinforcement block 71 and the screw are all rolling friction. The reinforcement block 71 is provided with an inwardly concave arc groove adapted to the screw.

[0048] like Figure 1 , Figure 2 and Figure 5 As shown, during actual operation, when the lifting plate 40 moves down, the push-pull rod 81 pushes the pressure plate 82 downward to move closer to the upper end of the support plate. The pushing block 83 also moves down to move closer to the corresponding inclined block 80. Then, the pushing block 83 abuts against the inclined surface of the inclined block 80 to push the inclined block 80 to move towards the corresponding shaft plate. The inclined block 80 then pushes the reinforcing block 71 through the slide rod to support and limit the middle part of the screw, increasing its force points to further improve the stability of the screw during rotation. At this time, the fixing mechanism 2 completes the fixing of the screw and the support plate, while the limiting mechanism 3 completes the limiting of the nut. The pressure plate 82 abuts against the upper end of the support plate to limit the up and down movement of the support plate, while ensuring that the fixing mechanism 2 fixes the screw and the support plate.

[0049] Subsequently, the drive component 4 drives the docked and fixed pallet and screw to rotate and weld synchronously, while the pressure plate 82 always keeps the pallet in a limited position to ensure the overall stability of the pallet and screw during the top support rotation welding process, thereby improving the welding quality.

[0050] In the description of this invention, it should be understood that directional terms such as "front, back, up, down, left, right," "horizontal, vertical, horizontal," and "top, bottom," indicating directions or positional relationships, are generally based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner or outer contours of each component itself. Furthermore, in the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic welding system for metal parts, comprising a frame; wherein, The metal part consists of a tray with a through hole and U-shaped, a nut, and a hollow screw with external threads. The feature is that a tray is rotatably mounted on the frame, a fixing plate is mounted on the upper end of the frame through a support column, a limiting mechanism is provided on the fixing plate, and a fixing mechanism is provided on the tray. The fixing mechanism includes a guide, two sets of extrusion parts that are slidably mounted on the pallet, a column that is coaxially fixed on the pallet, a slip ring that is slidably sleeved on the column, a connecting rod that is hinged between the slip ring and the extrusion part, a positioning block that is evenly slidably mounted on the upper end of the slip ring along its circumference, and a reinforcement part on the column. The limiting mechanism includes a turntable that is rotatably mounted on the upper part of the fixed plate and coaxial with the tray. Both the fixed plate and the turntable are provided with U-shaped grooves. Two pairs of left and right symmetrical limiting blocks are slidably mounted on the upper part of the turntable. A lower pressure plate is provided above the fixed plate. A linkage component is provided between the lower pressure plate and the turntable. A driving component for synchronous rotation is provided between the lower pressure plate and the tray. Place the tray upside down between the two pre-fixed plates, with the column passing through the through hole in the tray. The inner surface of the horizontal section of the tray abuts against the upper end face of the slip ring, and the vertical section of the tray is located inside the corresponding extrusion part. Move the screw from top to bottom onto the column and abut against the outer surface of the horizontal section of the tray. The nut moves with the screw from a position higher than the limit block to between the pair of limit blocks and contacts the upper end of the turntable. The lower pressure plate presses the screw down, and the screw pushes the slip ring down through the support plate. During this time, the positioning block moves radially under the action of the guide to provide internal support and alignment for the support plate and the screw. The slip ring drives the extrusion component to clamp the support plate through the connecting rod. At the same time, the limit block squeezes the limit nut through the linkage component. The reinforcement part also moves down with the lower pressure plate to support the middle of the limit screw and press the upper part of the support plate.

2. The automatic welding system for metal parts according to claim 1, characterized in that: The guide includes slots on the column that correspond one-to-one with the positioning blocks. A connecting plate is fixedly installed at the end of the positioning block near the center of the column. The connecting plate slides into the corresponding slot. The inner wall of the slot has an inclined groove that slopes from top to bottom away from the center of the column. A guide post that cooperates with the inclined groove is fixedly installed on the connecting plate. A compression spring sleeved on the column is fixedly installed between the lower end of the slip ring and the tray.

3. The automatic welding system for metal parts according to claim 1, characterized in that: The driving component includes a lifting plate disposed above a fixed plate, the fixed plate being located above a tray, a lower pressure plate being rotatably mounted on the lifting plate, a rotating shaft being rotatably mounted on the frame, a splined shaft being mounted after the upper end of the rotating shaft rotatably passes through the fixed plate, a splined sleeve being slidably fitted on the splined shaft, and the upper end of the splined sleeve rotatably passing through the lifting plate.

4. The automatic welding system for metal parts according to claim 3, characterized in that: The reinforcement includes a support plate fixedly installed on the support column and located directly below the fixed plate. The support plate also has a U-shaped groove. Two shaft plates symmetrical about the U-shaped groove are fixedly installed on the upper end of the support plate. A reinforcement block is slidably installed on one end of the shaft plate near the U-shaped groove via a pair of sliding rods. A tension spring is sleeved on the sliding rod. An actuator for pushing the reinforcement block to move and pressing down the support plate is provided on the lifting plate.

5. The automatic welding system for metal parts according to claim 4, characterized in that: The reinforcement unit also includes an actuator on the lifting plate for pushing the reinforcement block to move and pressing down the support plate. The actuator includes an inclined block that is fixedly installed at the end of each pair of sliding rods away from the reinforcement block. The inclined block is slidably connected to the upper end of the support plate. Two pairs of left and right symmetrical push-pull rods are fixedly installed at the lower end of the lifting plate. After the lower end of each pair of push-pull rods slides through the fixed plate and the support plate in sequence, a pressure plate for pressing down the support plate is fixedly installed. A pushing block for pushing the inclined block to move is fixedly installed on each pair of push-pull rods.

6. The automatic welding system for metal parts according to claim 1, characterized in that: The extrusion component includes two symmetrical extrusion blocks. In each set of extrusion components, the extrusion block closest to the slip ring is hinged to the corresponding connecting rod. A pair of connecting plates are fixedly installed between the extrusion blocks on the right side of the two sets of extrusion components, and a pair of connecting plates are also installed between the other two extrusion blocks.

7. The automatic welding system for metal parts according to claim 3, characterized in that: The spline sleeve and the lower pressure plate, as well as the shaft and the tray, are all connected by belt drive. A motor with an output shaft connected to the shaft is fixedly installed on the frame. A cylinder is fixedly installed at the lower end of the fixed plate. The telescopic section of the cylinder slides through the fixed plate and is fixedly connected to the lifting plate.

8. The automatic welding system for metal parts according to claim 1, characterized in that: The linkage includes a tension spring installed on the opposite ends of each pair of limit blocks. The other end of the tension spring is fixedly connected to the turntable through a vertical plate. The upper end of the limit block is provided with an inclined surface, and the paired inclined surfaces form a regular V-shaped structure. The lower end of the pressure plate is provided with an extrusion groove that corresponds to and cooperates with the limit blocks.

9. The automatic welding system for metal parts according to claim 1, characterized in that: Two symmetrical connecting columns are fixedly installed at the lower end of the pressure plate, and the lower ends of the connecting columns are slidably inserted into the turntable.

10. The automatic welding system for metal parts according to claim 1, characterized in that: Two symmetrical pre-fixed plates are fixedly installed on the upper end of the tray, and the extrusion component is located between the pre-fixed plates.

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