Supporting and fixing structure for gantry automatic welding machine

Abstract

The utility model discloses a kind of support fixed structures for gantry type automatic welding machine, it is related to automatic welding machine support technical field, including workbench, the upper portion of workbench is provided with portal frame, the upper surface of workbench is provided with built-in groove, the left side of cylinder is equipped with first movable plate by telescopic link. The support fixed structure for gantry type automatic welding machine, for small workpiece, device drives first movable plate by cylinder, second movable plate is linked through rotating shaft assembly, connecting strip and movable strip, drive both sides clamping assembly along first guide rod and guide groove synchronous close, realize accurate both sides clamping;For large workpiece, on the basis of both sides clamping assembly, rotate adjusting bolt, drive limit plate to move along second guide rod, auxiliary clamping by protection block on limit plate from front to back direction, form the structure of "four sides clamping", solve the problem of workpiece torsion, shaking caused by traditional single both sides clamping.

Description

Technical Field

[0001] This utility model relates to the field of automatic welding machine support technology, specifically a support and fixing structure for a gantry-type automatic welding machine. Background Technology

[0002] Gantry automatic welding machines, as core equipment for welding large components, are widely used in shipbuilding, steel structure bridges, pressure vessels, engineering machinery and other fields. They use a gantry frame to support the welding head and traveling mechanism, enabling precise welding of long welds and large-sized workpieces.

[0003] In welding operations, the effectiveness of workpiece fixation is the core prerequisite for determining welding quality. Key indicators such as weld straightness, weld penetration uniformity, and joint strength all depend on the absence of any displacement or deformation of the workpiece during the welding process. The support and fixing structure is the core component for achieving reliable workpiece fixation. Through the coordinated action of the positioning reference and the clamping mechanism, the workpiece is stably constrained in the preset welding position, providing a stable working reference for the welding head.

[0004] For example, Chinese utility model patent application number 202123247854.4 discloses a support and fixing structure for a gantry welding machine. By setting a clamping and fixing device, it can quickly clamp and fix workpieces of different sizes. A lifting drive device provides power to the clamping and fixing device, allowing for smooth clamping. However, this device still has certain shortcomings. When clamping large workpieces, only the two sides of the workpiece can be clamped. The uneven distribution of clamping force on both sides can easily cause the workpiece to twist or sway. Especially when welding at high speed on the gantry, the inertial force will exacerbate this instability and increase the probability of defects such as weld undercut and lack of fusion.

[0005] Therefore, we propose a support and fixing structure for a gantry-type automatic welding machine to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this utility model is to provide a support and fixing structure for a gantry-type automatic welding machine, so as to solve the problem mentioned in the background art that when clamping large workpieces, the current market can only clamp the two sides of the workpiece. The uneven distribution of clamping force on the two sides makes the workpiece prone to twisting or shaking. Especially when the gantry moves at high speed for welding, the inertial force will exacerbate this instability and increase the probability of defects such as weld undercut and lack of fusion.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a support and fixing structure for a gantry-type automatic welding machine, including a worktable, a gantry frame above the worktable, welding components installed on the lower surface of the gantry frame, an internal groove on the upper surface of the worktable, a cylinder installed on the right side of the internal groove, a first movable plate installed on the left side of the cylinder via a telescopic rod, a second movable plate on the left side of the first movable plate, and clamping components installed above both the second movable plate and the first movable plate; A support frame is installed on the upper surface of the workbench, and vertical plates are installed on both the front and rear sides of the upper surface of the support frame. Adjusting bolts are installed on each of the vertical plates, and limit plates are installed on the opposite side of each adjusting bolt.

[0008] Preferably, a first guide rod is installed on both the front and rear sides of the interior of the built-in groove. The first guide rod passes through the first movable plate and the second movable plate, and both the first movable plate and the second movable plate are slidably connected to the first guide rod.

[0009] With the above structural design, when the cylinder drives the first movable plate to move, the first movable plate and the second movable plate slide along the first guide rod, which restricts the movement trajectory of the two movable plates, prevents them from deviating and causing misalignment of the clamping components, ensures that the clamping components can accurately align with the workpiece clamping position, and improves the clamping accuracy and stability of small workpieces.

[0010] Preferably, a rotating shaft assembly is installed on both the front and rear sides of the inner wall of the built-in groove, and a connecting strip is installed on both the left and right sides of the rotating shaft assembly. A movable strip is hinged to the side of the connecting strip away from the rotating shaft assembly, and the other ends of the two movable strips are respectively hinged to the first movable plate and the second movable plate.

[0011] With the above structural design, when the cylinder pushes the first movable plate to move to the left, the first movable plate pulls the connecting bar to rotate around the rotating shaft assembly through the movable bar. The connecting bar then pushes the second movable plate to move synchronously through the movable bar on the other side, realizing the linkage and close proximity of the first and second movable plates. This ensures that the clamping assemblies on both sides clamp the workpiece synchronously and avoids workpiece displacement caused by force on one side.

[0012] Preferably, the support frame is detachably connected to the worktable, the support frame is located above the built-in slot, and heat dissipation holes are provided on the front surface of the support frame.

[0013] The above structural design avoids heat buildup that could affect the operational stability of the internal components and extends the service life of the equipment.

[0014] Preferably, the upper surface of the support frame is provided with a guide groove, and the clamping assembly is slidably connected to the guide groove.

[0015] With the above structural design, when the first movable plate and the second movable plate drive the clamping assembly to move, the clamping assembly slides along the guide groove, further restricting the movement direction of the clamping assembly, preventing it from deviating, ensuring that the clamping assembly always fits the workpiece surface, improving clamping stability, and is especially suitable for precise positioning when clamping large workpieces.

[0016] Preferably, a bearing assembly is installed on the opposite side of the limiting plate, and the bearing assembly is connected to the adjusting bolt. A protective block is installed on the opposite side of the limiting plate.

[0017] With the above structural design, when the adjusting bolt is rotated, the bearing assembly can prevent the limiting plate from rotating synchronously with the bolt, and only drive the limiting plate to move horizontally, ensuring that the limiting plate moves smoothly closer to the workpiece; the protective block on the opposite side of the limiting plate directly contacts the workpiece, avoiding hard contact of the limiting plate to scratch the surface of the workpiece, while increasing friction, improving the stability of clamping large workpieces, and reducing workpiece loosening caused by welding inertia.

[0018] Preferably, a second guide rod is installed on both the left and right sides of the upper surface of the workbench, the second guide rod passes through the limiting plate, and the limiting plate is slidably connected to the second guide rod.

[0019] With the above structural design, when the rotating adjusting bolt drives the limiting plate to move, the limiting plate slides along the second guide rod, restricting the movement trajectory of the limiting plate and preventing it from deviating and causing misalignment with the clamping assembly. This ensures that the limiting plate can accurately cooperate with the clamping assembly, realize the synchronous clamping of large workpieces on four sides, and avoid the workpiece from twisting due to uneven distribution of clamping force.

[0020] Compared with the prior art, the beneficial effects of this utility model are: the gantry-type automatic welding machine uses a support and fixing structure: 1. The combination of "workpiece size adaptation + multi-directional clamping" ensures welding stability. For small workpieces, the device drives the first movable plate with a cylinder, which in turn drives the second movable plate via a rotating shaft assembly, connecting bar, and movable bar. This drives the clamping assemblies on both sides to move synchronously along the first guide rod and guide groove, achieving precise clamping from both sides. For large workpieces, based on the clamping assemblies on both sides, the adjusting bolt on the vertical plate is rotated to move the limiting plate along the second guide rod. The protective block on the limiting plate assists in clamping from the front and rear directions, forming a "four-sided clamping" structure. This solves the problem of workpiece twisting and shaking caused by traditional single-sided clamping, and is especially suitable for high-speed welding scenarios on gantry cranes, reducing weld defects. 2. The structural design balances practicality and protection, extending equipment lifespan and improving ease of operation. On the one hand, the support frame is detachably connected to the worktable, which provides additional support for the workpiece and protects the cylinder, movable plate and other components in the built-in groove from welding spatter damage; on the other hand, the clamping assembly slides along the guide groove and the limiting plate is connected to the adjusting bolt through the bearing assembly, which ensures precise and stable clamping adjustment. At the same time, the protective block can prevent scratches on the workpiece surface, taking into account the needs of equipment protection, operation convenience and workpiece protection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall main structure of this utility model; Figure 2 This is a schematic diagram of the upper surface structure of the worktable of this utility model; Figure 3 This is a schematic diagram of the structure of the support frame of this utility model when it is separated from the worktable; Figure 4 This is a schematic diagram of the internal structure of the built-in groove of this utility model; Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0022] In the diagram: 1. Workbench; 2. Gantry frame; 3. Welding assembly; 4. Built-in slot; 5. Cylinder; 6. First movable plate; 7. Second movable plate; 8. Clamping assembly; 9. First guide rod; 10. Rotary shaft assembly; 11. Connecting bar; 12. Movable bar; 13. Support frame; 14. Heat dissipation hole; 15. Guide slot; 16. Vertical plate; 17. Adjusting bolt; 18. Limiting plate; 19. Protective block; 20. Second guide rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5This utility model provides a technical solution: a support and fixing structure for a gantry-type automatic welding machine, including a worktable 1, a gantry frame 2, a welding assembly 3, an internal groove 4, a cylinder 5, a first movable plate 6, a second movable plate 7, a clamping assembly 8, a first guide rod 9, a rotating shaft assembly 10, a connecting strip 11, a movable strip 12, a support frame 13, heat dissipation holes 14, a guide groove 15, a vertical plate 16, adjusting bolts 17, a limiting plate 18, a protective block 19, and a second guide rod 20. The gantry frame 2 is arranged above the worktable 1. Furthermore, a welding assembly 3 is installed on the lower surface of the gantry frame 2, and an internal groove 4 is formed on the upper surface of the worktable 1. A cylinder 5 is installed on the right side of the internal groove 4, and a first movable plate 6 is installed on the left side of the cylinder 5 via a telescopic rod. A second movable plate 7 is set on the left side of the first movable plate 6. A clamping assembly 8 is installed above both the second movable plate 7 and the first movable plate 6. A first guide rod 9 is installed on both the front and rear sides of the internal groove 4. The first guide rod 9 passes through the first movable plate 6 and the second movable plate 7. The first movable plate 6 and the second movable plate 7 are slidably connected to the first guide rod 9. When the cylinder 5 drives the first movable plate 6 to move, the first movable plate 6 and the second movable plate 7 slide along the first guide rod 9, limiting the movement trajectory of the two movable plates and preventing them from deviating and causing the clamping assembly 8 to be misaligned. This ensures that the clamping assembly 8 can accurately align with the workpiece clamping position, improving the clamping accuracy and stability of small workpieces. A rotating shaft assembly 10 is installed on both the front and rear sides of the inner wall of the internal groove 4, and a connecting strip 11 is installed on both the left and right sides of the rotating shaft assembly 10. The connecting strip 11 is located away from the rotating shaft assembly. Each side of component 10 is hinged with a movable bar 12. The other ends of the two movable bars 12 are respectively hinged to the first movable plate 6 and the second movable plate 7. When the cylinder 5 pushes the first movable plate 6 to move to the left, the first movable plate 6 pulls the connecting bar 11 to rotate around the rotating shaft assembly 10 through the movable bar 12. The connecting bar 11 then pushes the second movable plate 7 to move synchronously through the movable bar 12 on the other side, so as to realize the linkage and close proximity of the first movable plate 6 and the second movable plate 7, ensuring that the clamping assemblies 8 on both sides clamp the workpiece synchronously and avoid the workpiece shifting due to unilateral force.

[0025] A support frame 13 is mounted on the upper surface of the worktable 1. The support frame 13 is detachably connected to the worktable 1. The support frame 13 is located above the built-in slot 4. Heat dissipation holes 14 are provided on the front surface of the support frame 13 to prevent heat accumulation from affecting the operational stability of the internal components of the built-in slot 4 and to extend the service life of the equipment. Vertical plates 16 are mounted on both the front and rear sides of the upper surface of the support frame 13. Guide grooves 15 are provided on the upper surface of the support frame 13. The clamping assembly 8 is slidably connected to the guide grooves 15. When the first movable plate 6 and the second movable plate 7 move the clamping assembly 8, the clamping assembly 8 slides along the guide grooves 15, further restricting the movement direction of the clamping assembly 8, preventing it from deviating, ensuring that the clamping assembly 8 always fits against the workpiece surface, and improving clamping stability. This is especially suitable for precise positioning when clamping large workpieces. Adjusting bolts 17 are mounted on each of the vertical plates 16, and limit plates 18 are mounted on the opposite side of each adjusting bolt 17. Bearing assemblies are mounted on the opposite side of each limit plate 18. The bearing assemblies are connected to the adjusting bolts 17. The connection is such that protective blocks 19 are installed on opposite sides of the limiting plate 18. When the adjusting bolt 17 is rotated, the bearing assembly can prevent the limiting plate 18 from rotating synchronously with the bolt, and only drive the limiting plate 18 to move horizontally, ensuring that the limiting plate 18 moves smoothly close to the workpiece. The protective blocks 19 on opposite sides of the limiting plate 18 directly contact the workpiece, preventing the limiting plate 18 from scratching the workpiece surface by hard contact, while increasing friction, improving the stability of the large workpiece clamping, and reducing the loosening of the workpiece caused by welding inertia. Second guide rods 20 are installed on both the left and right sides of the upper surface of the worktable 1. The second guide rods 20 pass through the limiting plate 18, and the limiting plate 18 is slidably connected to the second guide rods 20. When the adjusting bolt 17 is rotated to drive the limiting plate 18 to move, the limiting plate 18 slides along the second guide rods 20, restricting the movement trajectory of the limiting plate 18, preventing it from deviating and causing misalignment with the clamping assembly 8, ensuring that the limiting plate 18 can accurately cooperate with the clamping assembly 8, realizing the synchronous clamping of the large workpiece on four sides, and avoiding the workpiece from twisting due to uneven distribution of clamping force.

[0026] It should be noted that when clamping a large workpiece from four sides, the length and width of the workpiece are both greater than the length of the clamping assembly 8. In addition, the gantry 2 and welding assembly 3 in this application are existing technical parts in the field, and their internal structure and working principle will not be described in detail here.

[0027] Working principle: When using the support and fixing structure of this gantry automatic welding machine, firstly, if it is a small workpiece, start the clamping and fixing on both sides: start cylinder 5, cylinder 5 pushes the first movable plate 6 to the left through the telescopic rod; the first movable plate 6 and the second movable plate 7 both pass through the first guide rod 9 on the front and rear sides of the built-in groove 4 and are slidably connected to it. At the same time, the first movable plate 6 pulls the connecting bar 11 on the rotating shaft assembly 10 to rotate around the rotating shaft assembly 10 through the movable bar 12. The connecting bar 11 then pushes the second movable plate 7 to move synchronously through the movable bar 12 on the other side; the clamping assembly 8 above the first movable plate 6 and the second movable plate 7 moves with the movable plates until the clamping assembly 8 on both sides clamps the workpiece, completing the fixing of the small workpiece on both sides.

[0028] For large workpieces, activate four-sided clamping and fixing: After the clamping components 8 on both sides clamp the left and right sides of the workpiece, rotate the adjusting bolt 17. The adjusting bolt 17 drives the limiting plate 18 to move through the bearing assembly on the opposite side of the limiting plate 18 until the protective block 19 on the opposite side of the limiting plate 18 fits against the front and rear sides of the workpiece. The protective block 19 prevents scratches on the workpiece surface and increases friction, thereby achieving four-sided clamping and fixing of the workpiece and preventing the large workpiece from twisting or shaking during welding.

[0029] After clamping is completed, the welding operation is started: the gantry 2 moves the welding component 3 on the lower surface to weld the fixed workpiece.

[0030] After welding, the structure is reset: For small workpieces, the cylinder 5 is reverse-started to reset the first movable plate 6, the second movable plate 7, and the clamping assembly 8; for large workpieces, the adjusting bolt 17 is first rotated in the reverse direction to move the limiting plate 18 away from the workpiece, and then the cylinder 5 is reverse-started to reset the clamping assembly 8; finally, the welded workpiece is removed. If maintenance is required, the support frame 13 can be removed to inspect the internal components of the built-in groove 4, thus completing a complete work process and a series of tasks. Content not described in detail in this specification belongs to prior art known to those skilled in the art.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A support and fixing structure for a gantry-type automatic welding machine, comprising a worktable (1), a gantry frame (2) above the worktable (1), and welding components (3) mounted on the lower surface of the gantry frame (2), characterized in that: The upper surface of the workbench (1) is provided with an internal groove (4), and a cylinder (5) is installed on the right side of the internal groove (4). A first movable plate (6) is installed on the left side of the cylinder (5) via a telescopic rod, and a second movable plate (7) is provided on the left side of the first movable plate (6). A clamping assembly (8) is installed above both the second movable plate (7) and the first movable plate (6). The upper surface of the workbench (1) is equipped with a support frame (13), and vertical plates (16) are installed on both the front and rear sides of the upper surface of the support frame (13). Adjusting bolts (17) are installed on the vertical plates (16), and limit plates (18) are installed on the opposite side of the adjusting bolts (17).

2. The support and fixing structure for a gantry-type automatic welding machine according to claim 1, characterized in that: The built-in groove (4) has a first guide rod (9) installed on both the front and rear sides. The first guide rod (9) passes through the first movable plate (6) and the second movable plate (7). The first movable plate (6) and the second movable plate (7) are slidably connected to the first guide rod (9).

3. The support and fixing structure for a gantry-type automatic welding machine according to claim 2, characterized in that: The inner wall of the built-in groove (4) is equipped with a rotating shaft assembly (10) on both the front and rear sides, and a connecting strip (11) is installed on both the left and right sides of the rotating shaft assembly (10). A movable strip (12) is hinged to the side of the connecting strip (11) away from the rotating shaft assembly (10). The other ends of the two movable strips (12) are respectively hinged to the first movable plate (6) and the second movable plate (7).

4. The support and fixing structure for a gantry-type automatic welding machine according to claim 1, characterized in that: The support frame (13) is detachably connected to the workbench (1). The support frame (13) is located above the built-in slot (4). Heat dissipation holes (14) are provided on the front surface of the support frame (13).

5. The support and fixing structure for a gantry-type automatic welding machine according to claim 4, characterized in that: The upper surface of the support frame (13) is provided with a guide groove (15), and the clamping assembly (8) is slidably connected to the guide groove (15).

6. The support and fixing structure for a gantry-type automatic welding machine according to claim 1, characterized in that: Bearing assemblies are installed on the opposite side of the limiting plate (18), and the bearing assemblies are connected to the adjusting bolts (17). Protective blocks (19) are installed on the opposite side of the limiting plate (18).

7. The support and fixing structure for a gantry-type automatic welding machine according to claim 1, characterized in that: The workbench (1) has a second guide rod (20) installed on both the left and right sides of its upper surface. The second guide rod (20) passes through the limiting plate (18) and is slidably connected to the limiting plate (18).

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