Positioning device for gantry automatic welding machine

Abstract

The utility model discloses a kind of positioning device for gantry automatic welding machine, it is related to welding positioning technical field, including bearing frame, first positioning rack, second positioning rack, bolt plate and fourth positioning groove;The bearing frame inside is provided with clamping block structure, the clamping block structure includes second positioning rack, first positioning groove, second positioning groove, spring and limit bar, the limit bar is installed in second positioning rack, the spring is installed in limit bar side, the first positioning groove is set on the second positioning rack upper side, just by adjusting the engagement position of first positioning rack in different limit groove, it can be adapted to different length, width specification's workpiece to be welded, greatly reduce the investment of enterprise for specific workpiece custom-made special positioning device.

Description

Technical Field

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

[0002] Gantry-type automatic welding machines, due to their high degree of automation and excellent welding efficiency, have become core equipment for batch welding operations in fields such as steel structure processing, mechanical parts manufacturing, and pressure vessel production. In welding operations, the positioning accuracy of the workpiece directly determines the centering, penetration consistency, and appearance quality of the weld joint. If the positioning deviation exceeds the allowable range of the process, it can easily lead to defects such as weld misalignment, incomplete penetration, and weld beads—not only requiring subsequent rework and repair, but also potentially causing the workpiece to be scrapped. Therefore, the positioning device is a core component ensuring the process stability of gantry-type automatic welding machines. To address positioning requirements, patent application CN201920734536.4, entitled "A Positioning Device for a Gantry-Type Automatic Welding Machine," proposes an innovative solution: This device can preset drive plates of corresponding specifications according to the welding position of the welding plate; through the contact between the drive plates and solid balls, the welding head is pushed downwards. Each time the welding head contacts a drive plate, it completes one welding operation on the welding plate, ultimately achieving timed and fixed-point welding. This solution achieves automated positioning based on non-laser principles. Compared to traditional intelligent laser positioning technology, it not only has a simpler structure and lower cost but also wider applicability, significantly improving the welding efficiency of welding plates. However, the device still has obvious limitations: First, its telescopic mechanism can only adjust the height of the welding plate and cannot directly adapt to workpieces of different lengths and widths. If the workpiece specifications need to be changed, the support plate must be replaced or the spacing of the uprights must be adjusted to achieve adaptation, which is not flexible enough. Second, the design characteristics of the drive plate structure determine that it is only suitable for surface welding of flat workpieces and cannot meet the welding needs of three-dimensional workpieces such as H-beams and pipes, thus limiting its overall applicability. Based on this, this solution proposes "a positioning device for a gantry-type automatic welding machine" to solve the above problems. Utility Model Content

[0003] The purpose of this utility model is to provide a positioning device for a gantry-type automatic welding machine, so as to solve the problem mentioned in the background art that existing equipment on the market requires replacement of support plates or adjustment of the vertical spacing to achieve adaptation, resulting in insufficient operational flexibility.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a positioning device for a gantry-type automatic welding machine, comprising a support frame, a first positioning rack, a second positioning rack, a bolt plate, and a fourth positioning groove; The inner side of the support frame is provided with a locking block structure, which includes a second positioning rack, a first positioning groove, a second positioning groove, a spring, and a limiting strip. The limiting strip is installed inside the second positioning rack, the spring is installed on the side of the limiting strip, and the first positioning groove is located above the second positioning rack.

[0005] As a preferred technical solution of this utility model, the support frame is fixedly connected to a bolt plate on the side. The bolt plate has a U-shaped structure and circular bolt holes are opened on the surface of the bolt plate. By adopting the above technical solution, the U-shaped bolt plate can form a larger area of ​​contact and fixation with the side of the support frame. Compared with ordinary flat bolt connection, the force is more uniform, which can effectively resist the vibration generated during welding, prevent the bolt plate from loosening or deforming, and ensure the stability of the connection between the support frame and the welding machine body. At the same time, the circular bolt hole position can be compatible with different specifications of connecting bolts, without the need to process the hole position separately for a specific model of welding machine. This reduces the difficulty of adapting the support frame to different gantry automatic welding machines, expands the application range of the positioning device, and also provides convenience for the disassembly and replacement of bolts during later maintenance.

[0006] As a preferred technical solution of this utility model, the support frame is a rectangular structure in general, and a limiting groove is opened on the upper surface of the support frame. Ten limiting grooves are evenly distributed on the inner bottom surface of the support frame, and the support frame is a rectangular structure with an upward opening. By adopting the above technical solution, the rectangular structure of the support frame has better mechanical performance, can stably bear the weight of the workpiece to be welded, and avoids bending and deformation of the support frame due to workpiece pressure, thus providing a solid structural foundation for subsequent positioning accuracy. The upward opening design conforms to the operating habit of "placing the workpiece from top to bottom" in welding operations, making it easy for operators to quickly place the workpiece to be welded into the support frame. The ten evenly distributed limiting grooves can serve as adjustable installation references for the first positioning rack. Operators can engage the first positioning rack in different limiting grooves according to the length, width, and other dimensions of the workpiece, adapting to various specifications of workpieces without replacing the entire positioning device. This greatly improves the flexibility of the device and reduces the cost for enterprises to customize special positioning devices for different workpieces.

[0007] As a preferred technical solution of this utility model, a first positioning hole is opened on the left side of the support frame. There are two symmetrically distributed first positioning holes, and the first positioning hole is a through hole structure with a rectangular structure. Using the above technical solution, the two symmetrically distributed first positioning holes can provide a double-sided engagement reference for the second positioning rack. When the left side of the second positioning rack pops out, it can engage with both first positioning holes simultaneously. Compared with a single-sided positioning hole, this can prevent the second positioning rack from tilting or shifting due to unilateral force, ensuring that the positioning direction of the second positioning rack is consistent with the axis of the support frame. At the same time, the through hole of the rectangular structure can restrict the rotational freedom of the second positioning rack, preventing the second positioning rack from rotating around the hole axis under the action of welding vibration, further ensuring the positioning stability of the second positioning rack and providing support for the precise positioning of the workpiece.

[0008] As a preferred technical solution of this utility model, a second positioning hole is opened on the right side of the support frame, and a first positioning groove is fixedly connected to the inner side of the second positioning hole. The first positioning groove is a cylindrical structure. By adopting the above technical solution, the first positioning groove of the cylindrical structure can provide coaxial guidance for the sliding of the second positioning rack, ensuring that the second positioning rack always slides along the preset trajectory when it moves along the second positioning hole, avoiding left and right deviation or jamming, and ensuring the smoothness of the positioning action; in addition, the contact surface of the cylindrical structure is smoother, which can reduce the friction and wear between the second positioning rack and the first positioning groove, extend the service life of both, and effectively avoid the problem of increased positioning gap due to long-term wear, ensuring the positioning accuracy of the device during long-term use.

[0009] As a preferred technical solution of this utility model, the support frame is engaged with the first positioning rack through the limiting groove. There are three evenly distributed first positioning racks, and a third positioning groove is opened above the first positioning rack. The third positioning groove is a U-shaped structure with an upward opening. The first positioning rack is engaged with the second positioning rack through the third positioning groove, and a fourth positioning groove is opened below the first positioning rack for fixed positioning. Using the above technical solution, the three evenly distributed first positioning racks can form a three-point balanced support for the workpiece. Compared with single-point or two-point support, this can avoid local deformation of the workpiece due to uneven force, and at the same time disperse the pressure of the workpiece weight on the positioning structure, protecting the first positioning racks from damage. The U-shaped structure with an upward opening of the third positioning groove facilitates the quick engagement of the second positioning rack and can limit the second positioning rack in both left and right directions, preventing the second positioning rack from shifting laterally. The fourth positioning groove below the first positioning rack can fix the first positioning rack itself a second time, preventing it from coming out of the limiting groove under welding vibration. Finally, a three-level positioning and fixing structure of "bearing frame - limiting groove - first positioning rack - third positioning groove - second positioning rack" is formed, which greatly improves the overall positioning stability.

[0010] As a preferred technical solution of this utility model, a first positioning groove is opened below the second positioning rack, the first positioning groove is interlocked with the third positioning groove of the first positioning rack, a limiting strip is slidably connected inside the second positioning rack, the limiting strip passes through the first positioning rack through the fourth positioning groove, a second positioning groove is opened on the right side of the second positioning rack, the second positioning groove is interlocked with the first positioning groove, and when the left side of the second positioning rack pops out, it is interlocked with the first positioning hole; The above technical solution utilizes an interlocking mechanism between the first and third positioning grooves, which provides a larger contact area and higher engagement compared to planar contact. This effectively prevents relative sliding between the second and first positioning racks during welding, ensuring the workpiece is securely clamped. The limiting strip penetrates the first positioning rack through the fourth positioning groove, providing lateral fixation for the connection between the second and first positioning racks. Simultaneously, the second positioning rack engages with the first positioning groove through the second positioning groove and with the first positioning hole on its left side, forming a longitudinal bidirectional engagement. This double limiting structure completely restricts the second positioning rack's vertical, horizontal, and forward / backward freedom, virtually eliminating the risk of positioning deviation caused by welding vibration and ensuring workpiece positioning accuracy. Furthermore, the sliding connection design between the limiting strip and the second positioning rack allows operators to quickly release the fixation by pressing the limiting strip, adjust the position of the second positioning rack, and re-engage. This ensures positioning accuracy while also meeting the need for rapid adaptation to different workpiece specifications, effectively improving welding efficiency.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This positioning device excels in basic structure and connection stability. The support frame adopts an upward-opening rectangular structure, which not only conforms to the operating habit of "placing workpieces from top to bottom" in welding operations, facilitating rapid placement of parts, but also possesses excellent mechanical properties, capable of stably bearing the weight of the workpiece to avoid bending deformation; its side-fixed U-shaped bolt plates have a large contact area and uniform force distribution, which can resist welding vibration and prevent loosening, and the circular bolt hole positions are compatible with different specifications of bolts, reducing the difficulty of adapting to different gantry automatic welding machines, and also facilitating subsequent bolt maintenance; 2. The device is highly adaptable and can effectively control the cost of use. Ten limiting grooves are evenly distributed on the inner bottom surface of the support frame, which can be used as the adjustable installation reference for the first positioning rack. Operators do not need to replace the entire positioning device. They can adapt to workpieces of different lengths and widths by simply adjusting the engagement position of the first positioning rack in different limiting grooves. This greatly reduces the investment of enterprises in customizing special positioning devices for specific workpieces. 3. Regarding positioning accuracy and long-term stability, the device employs a multi-structure collaborative approach. Two symmetrically distributed rectangular through-hole-type first positioning holes on the left side of the support frame provide a double-sided engagement reference for the second positioning rack, preventing it from tilting or rotating under unilateral force. The cylindrical first positioning groove built into the second positioning hole on the right side provides coaxial guidance for the sliding of the second positioning rack, preventing offset and jamming. The smooth contact surface reduces friction and wear, preventing an increase in positioning gap after long-term use. Three evenly distributed first positioning racks form a three-point support, and also construct a three-level positioning structure: "support frame - limiting groove - first positioning rack - third positioning groove - second positioning rack," further enhancing positioning accuracy. 4. The device achieves a balance between workpiece clamping stability and operational efficiency. The first positioning groove below the second positioning rack and the third positioning groove of the first positioning rack interlock, resulting in a large contact area and high engagement, which can prevent relative slippage. At the same time, the second positioning rack forms a double limit by engaging with the first positioning hole and the limiting strip passing through the first positioning rack, which completely restricts its multi-directional degrees of freedom and eliminates the risk of displacement caused by welding vibration. The sliding connection of the limiting strip design allows the operator to quickly release or re-fix it by pressing, which improves the efficiency of workpiece replacement and positioning adjustment while ensuring clamping stability. Attached Figure Description

[0012] Figure 1 This is a side view of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the first positioning rack and the second positioning rack of this utility model; Figure 3 This is a schematic diagram of the second positioning rack and bolt plate structure of this utility model; Figure 4 This is a side view of the cross-sectional structure of the support frame of this utility model; Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the support frame and limiting groove structure of this utility model; Figure 7 This is a side view of the first positioning rack of this utility model; Figure 8 This is a schematic diagram of the spring and limiting strip structure of this utility model; Figure 9 This is a schematic diagram of the third and fourth positioning grooves of this utility model; Figure 10 This is a schematic diagram of the spring and limiting strip structure of this utility model.

[0013] In the diagram: 1. Support frame; 2. First positioning rack; 3. Second positioning rack; 4. Bolt plate; 5. First positioning hole; 6. Second positioning hole; 7. Limiting groove; 8. First positioning groove; 9. Second positioning groove; 10. Spring; 11. Limiting strip; 12. Third positioning groove; 13. Fourth positioning groove. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1-10 The technical solution of this utility model includes a support frame 1, a first positioning rack 2, a second positioning rack 3, a bolt plate 4, a first positioning hole 5, a second positioning hole 6, a limiting groove 7, a first positioning groove 8, a second positioning groove 9, a spring 10, a limiting strip 11, a third positioning groove 12, and a fourth positioning groove 13. The side of the support frame 1 is fixedly connected to a U-shaped bolt plate 4 with circular bolt holes on its surface. The U-shaped structure can form a large area of ​​fit and fixation with the side of the support frame 1. Compared with ordinary flat bolt connection, the force is more even, which can resist welding vibration and avoid loosening and deformation, and ensure the stability of the connection with the welding machine body. The circular bolt holes are compatible with bolts of different specifications, so there is no need to process them separately for specific welding machines, which reduces the difficulty of adaptation, expands the scope of application, and facilitates the replacement of bolts later. The support frame 1 is a rectangular structure with an upward opening. Ten limiting grooves 7 are evenly distributed on the inner bottom surface. The rectangular structure has excellent mechanical properties, which can stably bear the weight of the workpiece and avoid deformation, laying the foundation for positioning accuracy. The upward opening is in line with the operation habit of "placing the workpiece from top to bottom", improving the loading efficiency. The ten limiting grooves 7 serve as an adjustable installation reference for the first positioning rack 2. The operator can adjust the engagement position of the first positioning rack 2 according to the size of the workpiece. It can adapt to multiple specifications of workpieces without replacing the entire set of equipment, improving flexibility and reducing customization costs. The support frame 1 has two symmetrically distributed rectangular through holes 5 on its left side. The symmetrical design of the two holes provides a double-sided engagement reference for the second positioning rack 3, so that it can engage with both holes simultaneously when the left side pops out, avoiding tilting and displacement caused by unilateral force, and ensuring that the positioning direction is consistent with the axis of the support frame 1. The rectangular through holes can also restrict the rotational freedom of the second positioning rack 3, preventing it from rotating around the hole axis under welding vibration, and further ensuring its positioning stability. A second positioning hole 6 is opened on the right side of the support frame 1. The first positioning groove 8 of the cylindrical structure is fixedly connected to the inside of the hole. The cylindrical structure can provide coaxial guidance for the sliding of the second positioning rack 3, ensuring that it moves along the preset trajectory, avoiding deviation or jamming, and ensuring smooth positioning action. Moreover, the cylindrical contact surface is smooth, which can reduce friction and wear between the two and extend service life. At the same time, it can avoid the increase of positioning gap caused by long-term wear and maintain the positioning accuracy for long-term use. The support frame 1 is engaged with three evenly distributed first positioning racks 2 via limiting grooves 7. The first positioning racks 2 have an upward-opening U-shaped third positioning groove 12 above and a fourth positioning groove 13 below. The three-point distribution can evenly support the workpiece, avoid deformation of thin plate workpieces due to uneven force, and also distribute the weight to protect the racks. The U-shaped third positioning groove 12 facilitates the quick engagement of the second positioning racks 3 and prevents lateral displacement. The fourth positioning groove 13 provides secondary fixation for the first positioning racks 2 to prevent them from falling out. Finally, a three-level positioning structure of "support frame 1 - limiting groove 7 - first positioning rack 2 - third positioning groove 12 - second positioning rack 3" is formed, which improves the overall stability. The locking block structure includes a second positioning rack 3, a first positioning groove 8, a second positioning groove 9, a spring 10, and a limiting strip 11. The limiting strip 11 is installed inside the second positioning rack 3, and the spring 10 is attached to its side. The first positioning groove 8 and the second positioning groove 9 are respectively opened on the lower and right sides of the second positioning rack 3. When connected, the first positioning groove 8 and the third positioning groove 12 are staggered and engaged, and the second positioning groove 9 is engaged with the first positioning groove 8. The limiting strip 11 passes through the first positioning rack 2, and its left side pops out to engage with the first positioning hole 5. This design not only prevents relative sliding through staggered engagement and eliminates the risk of displacement through double limiting, but also allows for quick adjustment of position by pressing the limiting strip 11, taking into account both positioning accuracy and adaptation efficiency.

[0016] Working principle: When using a positioning device for a gantry-type automatic welding machine, the U-shaped bolt plate 4 on the side of the support frame 1 is used to pass bolts through the circular bolt holes on its surface, thus installing the support frame 1 at the designated position on the welding machine. The U-shaped structure can form a large-area fit with the side of the support frame 1, resulting in more uniform force distribution compared to ordinary flat bolt connections. This can resist subsequent welding vibrations and prevent loosening. The circular holes are compatible with bolts of different specifications, eliminating the need for separate processing for specific welding machines, thus enhancing adaptability and facilitating subsequent bolt maintenance. The inner bottom surface of the support frame 1 has ten evenly distributed limiting grooves 7. The operator will engage the three first positioning racks 2 into the matching limiting grooves 7 respectively, ensuring that the three racks are evenly distributed in three points. Then, the racks are fixed again by the fourth positioning groove 13 below the first positioning racks 2 to prevent the racks from coming out of the limiting grooves 7 in subsequent operations, thus initially building a support frame that is compatible with the workpiece size. The workpiece to be welded is placed into the support frame 1 from top to bottom. The upward-opening design of the support frame 1 conforms to the operating habit of "placing the workpiece from top to bottom", which facilitates rapid loading. The lower surface of the workpiece is in contact with the upper surface of the three first positioning racks 2. The three-point support can distribute the weight of the workpiece and avoid local deformation of thin plate workpieces due to uneven force. At the same time, the rectangular structure of the support frame 1 has excellent mechanical properties and can stably bear the weight of the workpiece, avoiding its own bending deformation, thus laying the foundation for accurate positioning. First, press the limiting strip 11 inside the second positioning rack 3. The limiting strip 11 compresses the side spring 10 and retracts, releasing the sliding restriction. Then, push the rack along the cylindrical first positioning groove 8 inside the second positioning hole 6 on the right side of the support frame 1. The cylindrical structure provides coaxial guidance to prevent offset and jamming until the first positioning groove 8 below the second positioning rack 3 and the U-shaped third positioning groove 12 of the first positioning rack 2 interlock and engage. The contact area is large and the engagement degree is high, preventing relative sliding. The second positioning groove 9 on the right side of the rack engages with the first positioning groove 8, and the left side pops out and engages with the two symmetrical first positioning holes 5 on the left side of the support frame 1. Release the limiting strip 11, and the spring 10 returns to its original position and pushes it through the fourth positioning groove 13 of the first positioning rack 2 to form a lateral fixation, completely restricting the rack's multi-directional freedom. The stable connection of the U-shaped bolt plate 4 prevents the overall displacement of the bearing frame 1; the smooth surface of the first positioning groove 8 of the cylinder reduces the friction and wear of the second positioning rack 3 and prevents the positioning gap from increasing after long-term use; the three-level positioning structure of "bearing frame 1 - limiting groove 7 - first positioning rack 2 - third positioning groove 12 - second positioning rack 3" can absorb welding vibration, ensure that the workpiece is always in a precise positioning state, and guarantee the welding quality. Press the limit bar 11 to release the engagement of the second positioning rack 3 and slide to adjust its position; then, according to the new workpiece size, reselect the engagement position of the first positioning rack 2 in the limit groove 7, and re-engage and fix it after adjustment. This design greatly shortens the workpiece switching time and effectively improves the welding operation efficiency.

[0017] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positioning device for a gantry-type automatic welding machine, comprising a support frame (1); characterized in that: The inner side of the support frame (1) is provided with a locking block structure, which includes a second positioning rack (3), a first positioning groove (8), a second positioning groove (9), a spring (10) and a limiting strip (11). The limiting strip (11) is installed inside the second positioning rack (3), the spring (10) is installed on the side of the limiting strip (11), and the first positioning groove (8) is located above the second positioning rack (3).

2. The positioning device for a gantry-type automatic welding machine according to claim 1, characterized in that, The support frame (1) is fixedly connected to a bolt plate (4) on its side. The bolt plate (4) has a U-shaped structure and circular bolt holes are opened on its surface.

3. The positioning device for a gantry-type automatic welding machine according to claim 2, characterized in that, The support frame (1) is a rectangular structure, and a limiting groove (7) is opened on the upper surface of the support frame (1). Ten limiting grooves (7) are evenly distributed on the inner bottom surface of the support frame (1), and the support frame (1) is a rectangular structure with an upward opening.

4. The positioning device for a gantry-type automatic welding machine according to claim 3, characterized in that, The support frame (1) has a first positioning hole (5) on its left side. There are two symmetrically distributed first positioning holes (5), and the first positioning hole (5) is a rectangular through hole structure.

5. A positioning device for a gantry-type automatic welding machine according to claim 4, characterized in that, The support frame (1) has a second positioning hole (6) on the right side, and a first positioning groove (8) is fixedly connected to the inside of the second positioning hole (6). The first positioning groove (8) is a cylindrical structure.

6. A positioning device for a gantry-type automatic welding machine according to claim 5, characterized in that, The support frame (1) is engaged with the first positioning rack (2) through the limiting groove (7). There are three evenly distributed first positioning racks (2), and a third positioning groove (12) is opened above the first positioning rack (2). The third positioning groove (12) is a U-shaped structure with an upward opening. The first positioning rack (2) is engaged with the second positioning rack (3) through the third positioning groove (12), and a fourth positioning groove (13) is opened below the first positioning rack (2) for fixed positioning.

7. A positioning device for a gantry-type automatic welding machine according to claim 6, characterized in that, A first positioning groove (8) is opened below the second positioning rack (3). The first positioning groove (8) and the third positioning groove (12) of the first positioning rack (2) are interlocked and engaged. A limiting strip (11) is slidably connected inside the second positioning rack (3). The limiting strip (11) passes through the first positioning rack (2) through the fourth positioning groove (13). A second positioning groove (9) is opened on the right side of the second positioning rack (3). The second positioning groove (9) is engaged with the first positioning groove (8). When the left side of the second positioning rack (3) pops out, it engages with the first positioning hole (5).

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