A CNC fixture platform for laser welding

Abstract

This invention provides a CNC fixture platform for laser welding, relating to the field of fixture platform technology. It includes a positioning mechanism for fixing the crossbeams and vertical beams of a forklift stop or overhead guard. The positioning mechanism includes a horizontally arranged support rod, four telescopic rods detachably mounted on the support rod, and a positioning assembly detachably mounted on the support rod to clamp and fix the crossbeams and vertical beams located on the four telescopic rods. The four telescopic rods form a parallelogram structure, and the telescopic rods are rotatably connected at their ends. The crossbeams and vertical beams are respectively placed on two rotatably connected telescopic rods, forming a forklift stop or overhead guard structure on the four telescopic rods. The positioning assembly applies a clamping force towards the telescopic rods to the crossbeams and vertical beams placed on the four telescopic rods. This invention simplifies the operation process, improves welding accuracy and quality, and enhances the versatility of the equipment.

Description

Technical Field

[0001] This invention relates to the field of fixture platform technology, specifically a CNC fixture platform for laser welding. Background Technology

[0002] In the manufacturing industry, laser welding technology is widely used for joining various metal components due to its significant advantages such as high precision, high efficiency, and good welding quality, especially in the manufacturing of structural components such as forklift racks and overhead guards for driver's cabs. However, the CNC fixture platforms currently used for laser welding face many problems that urgently need to be solved when dealing with actual production needs, which seriously restricts production efficiency and product quality.

[0003] 1. The arrangement of clamping tools is cumbersome.

[0004] The arrangement of clamping tools on existing laser welding processing tables is extremely cumbersome. Typically, multiple clamping devices need to be pre-planned and installed on the processing table based on the specific shape and size of the forklift racks and overhead guards to be welded. These clamping devices often require precise adjustment of position and angle to ensure secure fixation of various parts of the forklift rack or overhead guard. During installation, workers need to spend a significant amount of time and effort on measurement, positioning, and adjustment. This not only increases production preparation time and reduces production efficiency, but also makes it difficult to guarantee optimal fixation from each clamping device due to human error. If the shape or size of the forklift rack or overhead guard changes, the clamping tools need to be rearranged and adjusted, further increasing production complexity and cost.

[0005] 2. Only single-sided welding is possible.

[0006] Traditional laser welding fixture platforms typically only allow welding to one side of a forklift stop or overhead guard. After welding one side, the forklift stop or overhead guard needs to be removed from the fixture, flipped, and then reattached for welding the other side. This process is not only cumbersome, but the flipping and reattaching can easily cause displacement or deformation of the forklift stop or overhead guard, affecting welding accuracy and quality. Furthermore, frequent clamping and disassembly increases the risk of surface damage to the forklift stop or overhead guard, reducing the product's appearance. Simultaneously, the need to reattach the forklift stop or overhead guard after each welding operation significantly extends the production cycle and reduces production efficiency.

[0007] 3. Applicable to forklift racks and overhead guards with uniform shape and size.

[0008] Most existing clamping platforms can only accommodate welding forklift racks or overhead guards of specific shapes and sizes. The design and layout of their clamping devices are typically optimized for a particular specification of forklift rack or overhead guard. When welding forklift racks or overhead guards of different shapes or sizes is required, existing clamping devices often cannot meet the requirements. Furthermore, switching between production of different specifications of forklift racks or overhead guards requires a significant amount of time for clamp replacement and adjustment, further reducing production efficiency and limiting the company's production flexibility and market competitiveness.

[0009] 4. Rearranging the clamping device is costly and inefficient.

[0010] When welding forklift racks or overhead guards of different sizes is required, existing technology necessitates a rearrangement of the clamping devices. This process involves not only the disassembly, installation, and debugging of the clamping devices but also the replanning and adjustment of the processing table. The rearrangement process requires significant investment of human and material resources, increasing production costs. Furthermore, the lengthy rearrangement time leads to extended production line downtime, reducing equipment utilization and production efficiency. In addition, frequent clamping device replacements and adjustments increase equipment wear and tear and the risk of failure, further increasing maintenance costs.

[0011] In summary, existing laser welding fixture platforms suffer from numerous problems in areas such as clamping tool arrangement, welding surface limitations, compatibility with forklift racks or overhead guards, and clamping device replacement, failing to meet the demands of modern manufacturing for efficient, flexible, and high-quality welding. Therefore, developing a novel CNC fixture platform for laser welding that can solve these problems is of significant practical importance. Summary of the Invention

[0012] To address the aforementioned issues, this application provides a CNC fixture platform for laser welding.

[0013] To achieve the above objectives, this application provides the following technical solution: a CNC fixture platform for laser welding, comprising a positioning mechanism for fixing the crossbeams and vertical beams of a forklift rack or top guard, and a flipping assembly for controlling the positioning mechanism to flip. The positioning mechanism includes a horizontally arranged support rod, four telescopic rods detachably mounted on the support rod, and a positioning assembly detachably mounted on the support rod and clamping and fixing the crossbeams and vertical beams located on the four telescopic rods. The four telescopic rods form a parallelogram structure, and the telescopic rods are connected to each other by end rotation.

[0014] The crossbeams and vertical beams are respectively placed on two rotatably connected telescopic rods, forming a forklift rack or overhead guard structure on the four telescopic rods. The positioning components apply a clamping force towards the telescopic rods to the crossbeams and vertical beams placed on the four telescopic rods, and simultaneously apply a positioning force towards the center of the parallelogram to fix the forklift rack or overhead guard structure.

[0015] Preferably, the telescopic rod includes an extension arm, an extension rod, and a sliding strip. The end of the extension arm has a telescopic groove along its length, and the side of the extension arm has a sliding groove that passes through the telescopic groove. One end of the extension rod slides through the telescopic groove. The sliding strip slides through the sliding groove and is fixedly mounted on the extension rod.

[0016] A rotatable connection structure is provided at the opposite ends of the extension rod and extension arm.

[0017] Preferably, the telescopic rod also includes a telescopic spring inserted into the telescopic groove, with both ends of the telescopic spring connected to the bottom wall of the telescopic groove and the end of the telescopic rod.

[0018] Preferably, the connecting structure includes a rotating block fixedly disposed on the same side of the extension rod and the extension arm, and the rotating block has a rotating hole.

[0019] Preferably, in the parallelogram structure formed by the four telescopic rods, the rotating holes of the two rotating blocks at the two opposite corners are fitted with fixing bolts, and the fixing bolts can be detachably and fixedly installed in the mounting holes of the support rod body.

[0020] Preferably, when the rotating blocks are in contact with each other, the two rotating blocks are rotatably connected by a fixing bolt passing through two rotating holes and a fixing nut threadedly connected to the fixing bolt.

[0021] Preferably, when the rotating blocks are rotatably connected by fixing bolts, the opposite ends of the rotating blocks are provided with engaging teeth.

[0022] Preferably, the positioning component includes a lifting member detachably mounted on a support rod, an adjusting member mounted on the lifting member, and a horizontal block arranged laterally and connected to the output end of the adjusting member. The bottom of the horizontal block extends downward away from the lifting member and has two protrusions, forming a slot between the two protrusions to lock the crossbeam or vertical beam. The lifting member is located inside the window of the forklift rack or overhead guard structure. The output end of the lifting member drives the adjusting member to move upward, and the output end of the adjusting member then drives the horizontal block to move above the crossbeam or vertical beam. The output ends of the lifting member and the adjusting member retract synchronously, causing the horizontal block and the protrusions to press and tighten the contact surface of the crossbeam or vertical beam respectively, thus stably positioning the forklift rack or overhead guard structure formed by the crossbeam and vertical beam.

[0023] Preferably, the lifting component includes a lifting cylinder that is vertically mounted on a support rod;

[0024] The adjusting component includes an adjusting cylinder that is laterally disposed on the output end of the lifting cylinder. The adjusting cylinder is fixedly disposed on the output end of the lifting cylinder by a connecting block.

[0025] Preferably, the flipping assembly includes a base, a first support block and a second support block symmetrically arranged on both sides of the top of the base, a first rotating disk and a second rotating disk respectively rotatably arranged on the opposite end faces of the first support block and the second support block, and a drive motor arranged on the base and controlling the rotation degree of the first rotating disk or the second rotating disk around the axis. The support rod is arranged between the first rotating disk and the second rotating disk along the axial direction of the first rotating disk and the second rotating disk, and its two ends are detachably connected to the opposite faces of the first rotating disk and the second rotating disk respectively.

[0026] The beneficial effects of this invention are:

[0027] 1. With its detachable and adjustable telescopic rod and flexibly adjustable positioning components, it can quickly adapt to forklift racks or overhead guards of different shapes and sizes, improving the fixing efficiency of crossbeams and long beams and increasing production efficiency.

[0028] 2. The design of the flipping component allows for double-sided welding without the need for manual disassembly and re-fixing of the forklift rack or overhead guard, improving overall production efficiency. The automatic flipping mechanism enables precise control of the flipping angle and position, ensuring accurate alignment of the welding surfaces and thus improving welding precision and quality.

[0029] 3. The parallelogram structure formed by the four telescopic rods in the positioning mechanism, along with the precise pressing and tightening action of the positioning components, provides stable and reliable clamping for the forklift rack or overhead guard. During laser welding, it effectively prevents displacement of the forklift rack or overhead guard due to high temperature and vibration, ensuring welding accuracy.

[0030] 4. The parallelogram structure is formed by four telescopic rods with adjustable length. By changing the size of the parallelogram, it is easy to adapt to the welding of forklift racks or overhead guards of different sizes. This avoids the problem of needing to equip multiple sets of clamping platforms for different specifications of forklift racks or overhead guards in the existing technology, thus reducing production costs.

[0031] 5. When switching between production of different specifications of forklift racks or overhead guards, simple adjustments can be made by controlling the length of the telescopic rod and the position of the positioning components, without the need to rearrange the clamping device. This not only reduces equipment downtime and improves equipment utilization, but also reduces the risk of equipment wear and failure caused by frequent changes in clamping devices, thus reducing maintenance costs. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0033] Figure 1 This is a simplified structural diagram of the CNC fixture platform for laser welding proposed in this invention.

[0034] Figure 2 This is a schematic diagram of the structure of the CNC fixture platform for laser welding proposed in this invention, which is used to tilt forklift racks or overhead guards.

[0035] Figure 3 This is a schematic diagram of the positioning component of the present invention for fixing a forklift rack or overhead guard.

[0036] Figure 4 This is a schematic diagram of the first telescopic rod structure of the present invention.

[0037] Figure 5 This is a schematic diagram of the second type of telescopic rod structure of the present invention.

[0038] Figure 6 This is a schematic diagram of the cross-sectional structure of the second type of telescopic rod of the present invention.

[0039] Figure 7 This is a schematic diagram of the positioning component structure of the present invention.

[0040] Figure 8 for Figure 1 Enlarged structural diagram at point A in the middle.

[0041] Figure 9 for Figure 1 Enlarged structural diagram at point B in the middle.

[0042] Figure 10 for Figure 1 Enlarged structural diagram at point B in the middle.

[0043] In the diagram: 1. Laser welding device; 2. Base; 3. First support block; 4. Second support block; 5. First rotating disk; 6. Second rotating disk; 7. Support rod; 8. Mounting rod; 9. Connecting rod; 10. Mounting hole; 11. Crossbeam; 12. Vertical beam; 13. Extension arm; 14. Extension rod; 15. Rotating block; 16. Telescopic groove; 17. Sliding groove; 18. Telescopic spring; 19. Sliding bar; 20. Fixing hole; 21. Lifting cylinder; 22. Adjusting cylinder; 23. Fixing block; 24. Horizontal block; 25. Protrusion. Detailed Implementation

[0044] To make the technical means, creative features, achieved objectives, and effects of this invention readily understandable, the invention is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this invention and not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention.

[0045] In the existing field of laser welding, there are many problems that urgently need to be solved in the fixture platforms used for welding operations on forklift racks or overhead guards.

[0046] From the perspective of clamping tool arrangement, the process of arranging clamping tools on traditional clamping platforms is extremely cumbersome. Because different specifications of forklift stop racks or overhead guards vary significantly in shape and size, operators need to spend a considerable amount of time and effort to rearrange and adjust the clamping tools each time they replace or weld different specifications of forklift stop racks or overhead guards. For some irregularly shaped forklift stop racks or overhead guards, it may be necessary to install multiple clamps of different shapes and sizes, and precisely adjust their positions and angles to ensure secure clamping. This process is not only inefficient but also prone to inaccurate clamping due to human error, thus affecting the welding quality.

[0047] In terms of welding functionality, most existing fixture platforms can only perform single-sided welding. When double-sided welding of forklift racks or overhead guards is required, one side must be welded first, then the rack or guard must be removed from the fixture, manually flipped, and then re-secured before welding the other side can begin. This method not only increases the production cycle and reduces efficiency, but also makes it difficult to ensure the position and angle of the rack or guard remain completely unchanged during manual flipping, easily leading to inaccurate weld joints and affecting welding precision and quality.

[0048] Furthermore, existing clamping platforms have poor versatility, typically only adapting to welding forklift stop racks or overhead guards of specific shapes and sizes. If the shape or size of the forklift stop rack or overhead guard changes, a corresponding clamping platform needs to be redesigned and manufactured, undoubtedly increasing the company's equipment investment costs and production preparation time. At the same time, the process of rearranging the clamping devices is complex and time-consuming, further reducing production efficiency and increasing production costs.

[0049] To address the problems existing in the prior art, this CNC fixture platform for laser welding proposes an innovative solution. The fixture platform mainly includes a positioning mechanism and a flipping assembly. Through ingenious design and automated control, it simplifies the arrangement of clamping tools, automates double-sided welding, and adapts to forklift racks or overhead guards of various shapes and sizes, effectively solving the difficulties in the prior art.

[0050] Example 1: Reference Figures 1-10 The CNC fixture platform for laser welding shown includes a positioning mechanism for fixing the crossbeams 11 and 12 of a forklift rack or overhead guard, and a flipping assembly for controlling the positioning mechanism to flip. The positioning mechanism includes a horizontally arranged support rod 7, four telescopic rods detachably mounted on the support rod 7, and a positioning assembly detachably mounted on the support rod 7 to clamp and fix the crossbeams 11 and 12 located on the four telescopic rods. The four telescopic rods form a parallelogram structure, and the telescopic rods are rotatably connected to each other at their ends. The crossbeams 11 and 12 are respectively placed on the two rotatably connected telescopic rods, forming a forklift rack or overhead guard structure on the four telescopic rods. The positioning assembly applies a clamping force toward the telescopic rods to the crossbeams 11 and 12 placed on the four telescopic rods, and simultaneously applies a positioning force toward the center of the parallelogram to fix the forklift rack or overhead guard structure.

[0051] In this embodiment, during the preparation stage, four detachable telescopic rods are first installed onto the horizontally arranged support rod 7 (the length of the telescopic rods can be fixed). Since the telescopic rods are connected to each other via end rotation, the four telescopic rods form a parallelogram structure. Two opposite rotational connection positions are detachably installed on the support rod 7. With the length of the four telescopic rods fixed, the two rotational connection positions ensure the fixed position of the four telescopic rods on the support rod 7. Then, the crossbeams 11 and vertical beams 12 of the forklift rack or overhead guard are placed on the two rotationally connected telescopic rods. At this point, the two crossbeams 11 and two vertical beams 12 form a forklift rack or overhead guard structure on the four telescopic rods, with the contact points between the crossbeams 11 and vertical beams 12 located on the outer side of the four telescopic rods. Then, a positioning component detachably mounted on the support rod 7 applies a clamping force to the crossbeams 11 and vertical beams 12 placed on the four telescopic rods. This clamping force is directed towards the telescopic rods. Simultaneously, the positioning component also applies a positioning force controlling the crossbeams 11 and vertical beams 12 towards the center of the parallelogram, thereby achieving stable fixation of the forklift rack or overhead guard structure. Precise positioning and fixation ensure the stability of the crossbeams 11 and vertical beams 12 during the welding process, reducing welding errors and improving the quality of laser welding of the forklift rack or overhead guard, ensuring the dimensional accuracy and structural strength of the forklift rack or overhead guard. The laser welding device 1, which is set up in conjunction with the laser welding device, welds the abutment positions of the crossbeams 11 and vertical beams 12. The abutment positions of the crossbeams 11 and vertical beams 12 are located outside the telescopic rods, ensuring that the laser welding device 1 can weld the vertical direction of the abutment positions of the crossbeams 11 and vertical beams 12, avoiding interference from the telescopic rods and ensuring stable welding. After welding on one side is completed, the positioning mechanism (including support rod 7, telescopic rod, crossbeam 11, vertical beam 12, positioning component, and forklift rack or top guard after welding on one side) is rotated by controlling the flipping component, so that the laser welding device 1 can weld the other side of the forklift rack or top guard structure. This ensures that the laser welding device 1 can fully weld the forklift rack or top guard structure, solves the problem that traditional fixtures cannot achieve multi-angle welding, and improves the flexibility and efficiency of laser welding.

[0052] like Figure 10 As shown, Figure 10 In the diagram, A represents the fixed state of the positioning component on the forklift rack structure. Figure 10 B in the diagram represents the fixed state of the positioning component on the forklift overhead guard structure.

[0053] In this embodiment, a parallelogram structure is formed by detachable telescopic rods, allowing for flexible adjustment of the space enclosed by the four telescopic rods. This adapts to the placement of crossbeams 11 and vertical beams 12 of different sizes of forklift racks or overhead guards, solving the problem that traditional clamps are difficult to adapt to fixing forklift racks or overhead guards of various sizes. The positioning component not only applies a clamping force towards the telescopic rods to the crossbeams 11 and vertical beams 12, but also simultaneously applies a positioning force towards the center of the parallelogram. This dual-force application method can more accurately fix the crossbeams 11 and vertical beams 12 in the predetermined position, avoiding the problem of reduced welding quality caused by shaking or displacement of the forklift rack or overhead guard during laser welding.

[0054] In this embodiment, the adjustable telescopic rod structure and detachable installation method enable the CNC fixture platform to be applicable to welding various sizes and shapes of forklift racks or overhead guards, greatly enhancing the equipment's versatility and reducing the company's equipment procurement costs. Furthermore, the detachable installation design of each component facilitates equipment assembly, debugging, and maintenance, reducing operational difficulty and improving the equipment's operability and maintainability.

[0055] like Figure 4 As shown, the first telescopic rod structure includes an extension arm 13, an extension rod 14, and a sliding strip 19. The extension arm 13 has a telescopic groove 16 along its length at one end, and a sliding slot 17 through the telescopic groove 16 is provided on the side of the extension arm 13. One end of the extension rod 14 slides through the telescopic groove 16. The sliding strip 19 slides through the sliding slot 17 and is fixedly mounted on the extension rod 14. A rotatable connection structure is provided at the opposite ends of the extension rod 14 and the extension arm 13. Compared to the telescopic rod structure in the prior art, where one end of the rod is larger than the other, using the prior art telescopic rod structure would lead to horizontal... When beam 11 and vertical beam 12 are placed on two rotating connecting telescopic rods, the difference in thickness at both ends of the rods can cause beam 11 and vertical beam 12 to tilt, making it difficult to stably fix the forklift rack or top guard structure formed by beam 11 and vertical beam 12. In this invention, the sliding strip 19 slidably connected in the sliding groove 17 ensures that when beam 11 and vertical beam 12 are placed on the two rotating connecting telescopic rods, the contact surfaces with the telescopic rods are in the same plane. With the subsequent positioning components, it is easy to stably fix the positions of beam 11 and vertical beam 12, which constitute the forklift rack or top guard structure, on the four telescopic rods.

[0056] like Figures 5-6As shown, the second type of telescopic rod structure includes two extension arms 13, an extension rod 14, and a sliding strip 19. The two extension arms 13 have telescopic grooves 16 along their length at opposite ends, and the extension arms 13 have sliding slots 17 that pass through the telescopic grooves 16 on their sides. The two ends of the extension rod 14 are slidably inserted into different telescopic grooves 16. The sliding strip 19 is slidably inserted into the sliding slots 17 and fixedly mounted on the extension rod 14. The opposite ends of the two extension arms 13 are provided with a rotatable connection structure.

[0057] There are many ways to fix the length of the telescopic rod. In this embodiment, it is preferable to fix the position between the extension rod 14 and the extension arm 13 with bolts. The extension arm 13 has a fixing hole 20 on its side that communicates with the inside of the telescopic groove 16. The bolts are threadedly connected to the fixing hole 20. By rotating the bolts, the bolt ends are tightly abutted against the side of the extension rod 14 that passes through the telescopic groove 16, which facilitates the fixing of the position between the extension rod 14 and the extension arm 13. Compared with various fixing structures in the prior art, fixing with bolts is simple in structure and easy to operate, and also reduces costs.

[0058] like Figures 1-6 As shown, in this embodiment, the telescopic rod also includes a telescopic spring 18 that passes through the telescopic groove 16. The two ends of the telescopic spring 18 are connected to the bottom wall of the telescopic groove 16 and the end of the extension rod 14. In the clamping platform, when adjusting the length of the extension rod 14 passing through the extension arm 13, it is used to buffer the instantaneous impact force that occurs during the stretching process of the extension rod 14 due to excessive adjustment, so that the adjustment process of the telescopic rod is more stable and avoids damage to the telescopic rod or inaccurate positioning of the forklift rack or top guard due to rapid or forceful stretching.

[0059] like Figures 1-6 and Figure 9 As shown, in this embodiment, the connecting structure includes a rotating block 15 fixedly disposed on the same side of the extension rod 14 and the extension arm 13. The rotating block 15 has a rotating hole. In this embodiment, when the telescopic rods are rotatably connected, the two rotating blocks 15 are directly controlled to overlap, and a bolt passes through the rotating hole. The bolt is connected by a nut at the other end, thereby realizing the rotatable connection between the telescopic rods. This structure is simple and easy to use, reducing the failure rate of complex structures during long-term use.

[0060] like Figure 9 As shown, in this embodiment, when the rotating block 15 is in contact with the rotating block 15, the two rotating blocks 15 are rotatably connected by the fixing bolt passing through the two rotating holes and the fixing nut being threadedly connected to the fixing bolt.

[0061] like Figure 1-Figure 3As shown, in this embodiment, fixing bolts are inserted into the rotating holes of the two rotating blocks 15 at two opposite corners of the parallelogram structure formed by the four telescopic rods. The fixing bolts are detachably and fixedly installed in the mounting holes 10 on the support rod 7. By fixing the two rotating blocks 15 in the mounting holes 10 with the fixing bolts, the position of the extension rod 14 or extension arm 13 connected to the two rotating blocks 15 can be fixed. When the four telescopic rods form a parallelogram, the parallelogram structure is fixed when the relative corner positions of the parallelogram are fixed. This facilitates the stability of the subsequent fixing of the forklift rack or top guard structure formed by the crossbeam 11 and the vertical beam 12 on the telescopic rod, ensuring the stability and accuracy of the subsequent welding of the forklift rack or top guard structure by the laser welding device 1.

[0062] like Figure 9 As shown, in this embodiment, when the rotating blocks 15 are rotatably connected by fixing bolts, the opposite ends of the rotating blocks 15 are provided with engaging teeth. When the rotating blocks 15 are rotatably connected and fixed by bolts, the two rotating blocks 15 fit together because the opposite end faces of the rotating blocks 15 are provided with engaging teeth. After the parallelogram structure of the four telescopic rods is adjusted, the nuts and bolts are directly connected by threads to control the adjacent rotating blocks 15 to be tightly tightened together, ensuring the stability of the position between the rotating blocks 15 and the stability of the parallelogram structure formed by the four telescopic rods.

[0063] like Figure 1-Figure 2 As shown, the positioning component includes a lifting member detachably mounted on the support rod 7, an adjusting member mounted on the lifting member, and a horizontal block 24 horizontally mounted and connected to the output end of the adjusting member. The bottom of the horizontal block 24 extends downward away from the lifting member and has two protrusions 25. The two protrusions 25 form a slot to lock the crossbeam 11 or the vertical beam 12. The lifting member is located inside the window of the forklift rack or overhead guard structure. The output end of the lifting member drives the adjusting member to move upward, and the output end of the adjusting member then drives the horizontal block 24 to move above the crossbeam 11 or the vertical beam 12. The output ends of the lifting member and the adjusting member retract synchronously, causing the horizontal block 24 and the protrusions 25 to press and tighten the contact surfaces of the crossbeam 11 or the vertical beam 12 respectively, thus stably positioning the forklift rack or overhead guard structure formed by the crossbeam 11 and the vertical beam 12.

[0064] In this embodiment, after the forklift rack or overhead guard's crossbeam 11 and vertical beam 12 are placed on the telescopic rod to form the forklift rack or overhead guard structure, the lifting component begins to operate. Since the lifting component is located within the window of the forklift rack or overhead guard structure, it does not interfere with the forklift rack or overhead guard. The output end of the lifting component moves upward, causing the adjusting component to rise along with it, thereby causing the horizontal block 24 and protrusion 25 to move upward until the horizontal block 24 reaches a suitable height above the crossbeam 11 or vertical beam 12. When the horizontal block 24 reaches the suitable height, the output end of the adjusting component begins to move laterally, pushing the horizontal block 24 closer to the crossbeam 11 or vertical beam 12 in the horizontal direction. Through a precise control system, the adjusting component can accurately move the horizontal block 24 directly above the crossbeam 11 or vertical beam 12 according to preset parameters or real-time feedback information, so that the protrusion 25 is located above the side of the forklift rack or overhead guard. After the horizontal block 24 and protrusion 25 reach the suitable position, the output ends of the lifting component and the adjusting component begin to retract synchronously. The output end of the lifting component retracts downwards, causing the horizontal block 24 and the protrusion 25 to move downwards. At this time, the groove formed between the two protrusions 25 engages with the beam 11 or vertical beam 12, achieving relative fixation between the beam 11 or vertical beam 12 and the protrusion 25, and applying a downward clamping force to the contact surface of the beam 11 or vertical beam 12. Simultaneously, the output end of the adjusting component retracts towards the center of the forklift rack or overhead guard, causing the horizontal block 24 to drive the protrusion 25 to apply a tensioning force towards the center of the parallelogram on the beam 11 or vertical beam 12. These two forces work together to fix the forklift rack or overhead guard structure from multiple directions, effectively preventing displacement or deformation of the forklift rack or overhead guard during welding, and achieving stable positioning of the forklift rack or overhead guard structure. Furthermore, the combined effect of these two forces forms a stable positioning system that can resist various external forces that may be generated during welding, such as vibration and thermal stress. This positioning method has high flexibility and precision. Because the lifting and adjusting components can be adjusted vertically and horizontally respectively, they can adapt to forklift racks or overhead guards of different sizes and shapes. Simultaneously, precise control of the output end's movement allows for accurate positioning of the forklift rack or overhead guard, improving welding quality and production efficiency. Furthermore, the positioning components have a relatively simple structure, are easy to install and maintain, and reduce production costs and ease of use.

[0065] like Figure 7 and Figure 8 As shown, the lifting component includes a lifting cylinder 21 vertically mounted on the support rod 7; the adjusting component includes an adjusting cylinder 22 horizontally mounted on the output end of the lifting cylinder 21. The adjusting cylinder 22 is fixedly mounted on the output end of the lifting cylinder 21 via a connecting block, and the lifting cylinder 21 is detachably mounted on the support rod 7 via a fixing block 23 mounted on the side.

[0066] like Figure 1-Figure 2As shown, in this embodiment, the flipping assembly includes a base 2, a first support block 3 and a second support block 4 symmetrically arranged on both sides of the top of the base 2, a first rotating disk 5 and a second rotating disk 6 respectively rotatably arranged on the opposite end faces of the first support block 3 and the second support block 4, and a drive motor arranged on the base 2 to control the first rotating disk 5 or the second rotating disk 6 to rotate 180 degrees around the axis. The support rod 7 is arranged between the first rotating disk 5 and the second rotating disk 6 along the axial direction of the first rotating disk 5 and the second rotating disk 6, and its two ends are detachably connected to the opposite faces of the first rotating disk 5 and the second rotating disk 6 respectively. An mounting rod 8 is vertically fixed on the end face of the support rod 7. The mounting rods 8 on both ends of the support rod 7 are detachably installed on the opposite faces of the first rotating disk 5 and the second rotating disk 6 by bolts, thereby realizing the installation of the support rod 7.

[0067] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A CNC fixture platform for laser welding, comprising a positioning mechanism for fixing the crossbeams (11) and vertical beams (12) of a forklift rack or overhead guard, and a flipping assembly for controlling the flipping of the positioning mechanism, characterized in that, The positioning mechanism includes a horizontally arranged support rod (7), four telescopic rods detachably mounted on the support rod (7), and a positioning assembly detachably mounted on the support rod (7) to clamp and fix the crossbeam (11) and vertical beam (12) located on the four telescopic rods. The four telescopic rods form a parallelogram structure, and the telescopic rods are connected to each other by end rotation. The crossbeam (11) and the vertical beam (12) are respectively placed on two rotatably connected telescopic rods, and form a forklift rack or top guard structure on the four telescopic rods. The positioning component applies a clamping force toward the telescopic rods to the crossbeam (11) and the vertical beam (12) placed on the four telescopic rods, and simultaneously applies a positioning force toward the center of the parallelogram to fix the forklift rack or top guard structure. The positioning component includes a lifting member detachably mounted on the support rod (7), an adjusting member mounted on the lifting member, and a horizontal block (24) horizontally mounted and connected to the output end of the adjusting member. The bottom of the horizontal block (24) extends downward from the position away from the lifting member and has two protrusions (25). A slot is formed between the two protrusions (25) to lock the horizontal beam (11) or the vertical beam (12). The lifting component is located inside the window of the forklift rack or top guard structure. The output end of the lifting component drives the adjusting component to move upward. The output end of the adjusting component then drives the horizontal block (24) to move above the horizontal beam (11) or vertical beam (12). The output ends of the lifting component and the adjusting component retract synchronously, driving the horizontal block (24) and the protrusion (25) to press and tighten the contact surface of the horizontal beam (11) or vertical beam (12) respectively, so as to stably position the forklift rack or top guard structure formed by the horizontal beam (11) and the vertical beam (12). The lifting component includes a lifting cylinder (21) that is vertically mounted on a support rod (7); The adjusting component includes an adjusting cylinder (22) arranged laterally on the output end of the lifting cylinder (21), and the adjusting cylinder (22) is fixedly arranged on the output end of the lifting cylinder (21) by a connecting block.

2. The CNC fixture platform for laser welding according to claim 1, characterized in that: The telescopic rod includes an extension arm (13), an extension rod (14), and a sliding bar (19). The extension arm (13) has a telescopic groove (16) along its length at its end, and a sliding groove (17) through the telescopic groove (16) is provided on the side of the extension arm (13). One end of the extension rod (14) slides through the telescopic groove (16). The sliding bar (19) slides through the sliding groove (17) and is fixedly installed on the extension rod (14). A rotatable connection structure is provided on the opposite ends of the extension rod (14) and the extension arm (13).

3. The CNC fixture platform for laser welding according to claim 2, characterized in that: The telescopic rod also includes a telescopic spring (18) that passes through the telescopic groove (16), with both ends of the telescopic spring (18) connected to the bottom wall of the telescopic groove (16) and the end of the extension rod (14).

4. A CNC fixture platform for laser welding according to claim 2 or 3, characterized in that: The connecting structure includes a rotating block (15) fixedly installed on the same side of the extension rod (14) and the extension arm (13), and the rotating block (15) has a rotating hole.

5. The CNC fixture platform for laser welding according to claim 4, characterized in that: The rotating holes of the two rotating blocks (15) at the two opposite corners of the parallelogram structure formed by the four telescopic rods are fitted with fixing bolts, and the fixing bolts can be detachably and fixedly installed in the mounting holes (10) of the support rod (7).

6. The CNC fixture platform for laser welding according to claim 5, characterized in that: When the rotating block (15) is in contact with the rotating block (15), the two rotating blocks (15) are rotated by passing through the two rotating holes with the fixing bolt and the fixing nut and the fixing bolt threaded connection.

7. A CNC fixture platform for laser welding according to claim 6, characterized in that: When the rotating block (15) and the rotating block (15) are rotatably connected by fixing bolts, the opposite ends of the rotating block (15) and the rotating block (15) are provided with snap-fit ​​teeth.

8. The CNC fixture platform for laser welding according to claim 1, characterized in that: The flipping assembly includes a base (2), a first support block (3) and a second support block (4) symmetrically arranged on both sides of the top of the base (2), a first rotating disk (5) and a second rotating disk (6) respectively rotatably arranged on the opposite end faces of the first support block (3) and the second support block (4), and a drive motor arranged on the base (2) to control the first rotating disk (5) or the second rotating disk (6) to rotate 180 degrees around the axis. The support rod (7) is arranged between the first rotating disk (5) and the second rotating disk (6) along the axial direction of the first rotating disk (5) and the second rotating disk (6), and its two ends are detachably connected to the opposite faces of the first rotating disk (5) and the second rotating disk (6) respectively.

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