Adjustable clamping device for stamping and laser combined machining

Abstract

The invention discloses an adjustable clamping device for stamping and laser combined machining in the technical field of plate machining equipment. The adjustable clamping device for stamping and laser combined machining comprises a machine table, straight tooth driving rails are installed on the two sides of the upper surface of the machine table, a sliding plate and a sliding block are connected to the straight tooth driving rails in a sliding mode, and a driving motor is installed on the sliding plate to drive the sliding plate to slide on the straight tooth driving rails. According to the adjustable clamping device for stamping and laser combined machining, by means of the design of the clamping mechanism, a plate can be clamped and positioned from the four corners of the plate, the plate can be tensioned from the four corners in cooperation with the tensioning assembly, the surface of the plate is smooth, meanwhile, the machining position on the plate is further pressed in cooperation with the design of the pressing mechanism, and the machining efficiency is improved. According to the clamping device, clamping and positioning of the plates meet the requirement for high-precision machining, the clamping requirements of the plates of different sizes can be met based on the adjustable structure of the containing frame, and the problems proposed in the background technology are solved.

Description

Technical Field

[0001] This invention relates to the technical field of sheet metal processing equipment, specifically to an adjustable clamping device for stamping laser composite processing. Background Technology

[0002] Stamping-laser composite machining, with its advantages of both high efficiency and high precision, has become the mainstream process for thin sheet metal processing, placing stringent requirements on the stability, positioning accuracy, and adaptability of workpiece clamping. Existing clamping devices are mostly rigid, fixed structures with limited clamping range adjustment, making it difficult to adapt to the clamping needs of workpieces of different sizes. Changeover and adjustment procedures are cumbersome, reducing production efficiency. Furthermore, traditional devices suffer from insufficient clamping force control precision, making thin sheet workpieces prone to deformation due to uneven force, resulting in uneven processed surfaces. This makes them unsuitable for the high precision requirements of stamping-laser composite machining. Some adjustable fixtures, on the other hand, suffer from complex structures and low adjustment precision, failing to meet the dynamic clamping requirements during composite machining. These factors hinder the application expansion and quality improvement of stamping-laser composite machining. Summary of the Invention

[0003] The purpose of this invention is to provide an adjustable clamping device for stamping laser composite processing, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an adjustable clamping device for stamping laser composite processing, comprising a machine base, a gantry frame on the upper surface of the machine base, a laser cutting mechanism mounted on the gantry frame via an XY axis drive mechanism, a stamping mechanism also mounted on the gantry frame, spur gear drive rails mounted on both sides of the upper surface of the machine base, sliding plates and sliding blocks slidably connected on the spur gear drive rails, a drive motor mounted on the sliding plates to drive the sliding plates to slide on the spur gear drive rails, a placement frame fixedly mounted between the two sliding plates and the two sliding blocks at four points, clamping mechanisms provided at the four corners of the placement frame for clamping the four corners of the sheet metal, and pressing mechanisms provided on both sides of the placement frame for pressing and flattening the processed surface of the sheet metal.

[0005] The clamping mechanism includes a sector-shaped disk, a movable shaft, a guide frame, a guide block, a guide groove, a guide shaft, a locking bolt, a U-shaped chuck, a clamping bolt, and a tensioning assembly. The sector-shaped disk is installed at the corner of the placement frame. The movable shaft is movably connected to the center of the sector-shaped disk. One end of the guide frame is fixedly connected to the movable shaft. A guide block is slidably connected inside the guide frame. The guide groove is opened on the sector-shaped disk and is concentric with the sector-shaped disk. The other end of the guide frame is fixedly connected to the guide shaft, which is slidably connected inside the guide groove. A locking bolt is threaded onto the guide frame. Tightening the locking bolt presses it onto the sector-shaped disk to fix the position of the guide frame. A U-shaped chuck is fixedly connected to the top of the guide block. A clamping bolt is threaded onto the top of the U-shaped chuck. Tightening the clamping bolt presses down on the plate to clamp its corners. A tensioning assembly is also provided on the guide frame to tighten the plate and make it flat.

[0006] Preferably, the tensioning assembly includes a tensioning motor and a tensioning screw. The tensioning motor is installed at the other end of the guide frame. Both ends of the tensioning screw are located inside the guide frame and are movably connected to both ends of the guide frame. The output end of the tensioning motor is fixedly connected to one end of the tensioning screw to drive the tensioning screw to rotate. The tensioning screw is threadedly connected to the drive screw hole in the middle of the guide block.

[0007] Preferably, the placement frame includes two half-frames, and a plug is fixedly connected to one side of any half-frame. The plug is inserted into a slot at a corresponding position on the other half-frame, and a positioning screw hole is provided at the corresponding slot position on the other half-frame. A positioning bolt is threaded into the positioning screw hole. Adjusting the insertion length of the plug into the slot can adjust the distance between the two half-frames to accommodate different sized plates.

[0008] Preferably, the clamping mechanism includes a guide rail, a guide slider, a connecting rod, a variable-diameter clamping wheel, a positioning plate, a snap-fit ​​groove, a ratchet structure, and a movable plate. The guide rail is disposed on one side of the upper surface of the placement frame. Two guide sliders are slidably connected within the guide rail. A movable plate is hinged to the guide slider. One end of the connecting rod is movably connected to the movable plate. The positioning plate is fixedly connected to the other side of the upper surface of the placement frame. The upper surface of the positioning plate has several equidistantly arranged snap-fit ​​grooves. A ratchet structure is provided at the end of the connecting rod away from the guide slider. The ratchet structure snaps into the snap-fit ​​groove. Several variable-diameter clamping wheels are sleeved on the connecting rod and positioned between the guide slider and the ratchet structure. The connecting rod has a polygonal cross-section.

[0009] Preferably, the ratchet structure includes an outer ring, a locking magnetic block, a retaining ring, an inner ring, ratchet teeth, a limiting spring, and a pawl. Two retaining rings are sleeved on the connecting rod, and the outer ring is fixedly connected between the two retaining rings. Several locking magnetic blocks are fixedly connected to the outer ring to engage with the locking groove. The inner ring is sleeved on the connecting rod and is located between the two retaining rings. The inner wall of the outer ring is provided with ratchet teeth. One end of the pawl is movably connected in a groove opened on the outer side of the inner ring. A limiting spring is also movably connected between the pawl and the inner wall of the groove so that the other end of the pawl extends out of the groove and contacts the ratchet teeth.

[0010] Preferably, the irregular diameter adjusting roller is a wheel-shaped structure with a gradually changing diameter, and the number of irregular diameter adjusting rollers on a single connecting rod is not less than two, with the two connecting rods arranged in parallel.

[0011] Preferably, both the locking bolt and the clamping bolt are provided with anti-slip pads at their bottom ends, and the anti-slip pads are rubber pads.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 1. This adjustable clamping device for stamping and laser composite processing utilizes the design of the clamping mechanism to clamp and position the sheet metal from its four corners. Combined with a tensioning component, it can tighten the sheet metal from its four corners, ensuring a flat surface. Simultaneously, the pressing mechanism further presses the processing position on the sheet metal, ensuring that the clamping and positioning of the sheet metal meets the requirements of high-precision processing. Furthermore, based on the adjustable structure of the placement frame, it can meet the clamping requirements of sheets of different sizes, solving the problems mentioned in the background technology.

[0014] 2. This adjustable clamping device for stamping and laser composite processing utilizes the design of the clamping mechanism to form multi-point clamping of the four corners and processing surface of the sheet metal, ensuring the flatness of the processing surface of the sheet metal. It is also compatible with the adjustable structure of the frame, and the position of the irregular diameter clamping roller is adjustable, which can perform targeted clamping on different points on the sheet metal. It is easy to operate and has a simple structure. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle.

[0018] Figure 3 For the present invention Figure 1 Enlarged view of point B in the middle.

[0019] Figure 4 For the present invention Figure 1 Enlarged view of point C in the middle.

[0020] Figure 5 This is a schematic diagram of the structure of the frame of the present invention.

[0021] Figure 6 This is a top view of the frame in which the present invention is placed.

[0022] Figure 7 For the present invention Figure 6 Cross-sectional view of AA.

[0023] Figure 8 For the present invention Figure 7 Enlarged view of point D in the middle.

[0024] Figure 9 This is a schematic diagram of the clamping mechanism of the present invention.

[0025] Figure 10 This is an exploded view of the ratchet structure of the present invention.

[0026] In the diagram: 1. Machine base; 2. Gantry frame; 3. Laser cutting mechanism; 4. Stamping mechanism; 5. Straight gear drive rail; 6. Clamping mechanism; 61. Guide rail; 62. Guide slider; 63. Connecting rod; 64. Irregular diameter clamping wheel; 65. Positioning plate; 66. Snap-fit ​​groove; 67. Ratchet structure; 671. Outer ring; 672. Snap-fit ​​magnetic block; 673. Holding ring; 674. Inner ring; 675. Ratchet; 676. Limiting spring; 677. Pawl; 6 8. Movable plate; 7. Sliding block; 8. Placement frame; 9. Clamping mechanism; 91. Fan-shaped disk; 92. Movable shaft; 93. Guide frame; 94. Guide block; 95. Guide groove; 96. Guide shaft; 97. Locking bolt; 98. U-shaped chuck; 99. Clamping bolt; 910. Tensioning assembly; 9101. Tensioning motor; 9102. Tensioning screw; 10. Sliding plate; 11. Insert rod; 12. Slot; 13. Positioning screw hole; 14. Positioning bolt. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1-10 This invention provides a technical solution: an adjustable clamping device for stamping laser composite processing, including a machine base 1. The machine base 1 is integrally cast from high-strength cast iron and has shock-absorbing pads at the bottom to reduce the impact of equipment vibration on processing accuracy during processing. A gantry frame 2 is provided on the upper surface of the machine base 1. A laser cutting mechanism 3 is mounted on the gantry frame 2 via an XY axis drive mechanism. A stamping mechanism 4 is also mounted on the gantry frame 2. The stamping mechanism 4 includes a hydraulic drive unit, a stamping head, and a mold mounting base. The hydraulic drive unit can provide stable stamping pressure. The stamping head can be replaced with different models according to processing requirements. As this is known technology, it will not be described in detail. Spur gear drive rails 5 are installed on both sides of the upper surface of the machine base 1, and slidably connected to the spur gear drive rails 5. There are sliding plates 10 and sliding blocks 7. A drive motor is installed on the sliding plates 10 to drive the sliding plates 10 to slide on the straight gear drive track 5. A placement frame 8 is fixedly installed between the two sliding plates 10 and the two sliding blocks 7 at four points. Clamping mechanisms 9 are provided at the four corners of the placement frame 8 to clamp the four corners of the plate. The four clamping mechanisms 9 are symmetrically arranged to realize synchronous clamping and tightening of the four corners of the plate, ensuring that the plate is subjected to uniform force and avoiding deformation of the plate due to excessive local force. Pressing mechanisms 6 are provided on both sides of the placement frame 8 to press and flatten the plate processing surface. The pressing mechanisms 6 are arranged in parallel on both sides, covering the two sides of the plate processing surface, which can effectively eliminate warping deformation during plate processing, ensure the flatness of the processing surface, and improve processing accuracy.

[0029] The clamping mechanism 9 includes a sector-shaped disk 91, a movable shaft 92, a guide frame 93, a guide block 94, a guide groove 95, a guide shaft 96, a locking bolt 97, a U-shaped chuck 98, a clamping bolt 99, and a tensioning assembly 910. The sector-shaped disk 91 is installed at the corner of the placement frame 8. The movable shaft 92 is movably connected to the center of the sector-shaped disk 91 via a bearing. One end of the guide frame 93 is fixedly connected to the movable shaft 92. The guide block 94 is slidably connected inside the guide frame 93. The guide groove 95 is formed on the sector-shaped disk 91 and is concentric with the sector-shaped disk 91. The guide groove 95 is an arc-shaped groove, and its width is adapted to the diameter of the guide shaft 96. The inner wall of the guide groove 95 is provided with a wear-resistant coating to reduce the wear of the guide shaft 96 during sliding and extend its service life. The other end of the guide frame 93 is fixedly connected to the guide shaft 92. A guide shaft 96 is fixedly connected and slidably connected in a guide groove 95. A locking bolt 97 is threadedly connected to the guide frame 93. Tightening the locking bolt 97 presses the guide frame 93 onto the sector plate 91 to fix its position. A U-shaped chuck 98 is fixedly connected to the top of the guide block 94. A clamping bolt 99 is threadedly connected to the top of the U-shaped chuck 98. Tightening the clamping bolt 99 presses down the plate to clamp its edges and corners. A tensioning component 910 is also provided on the guide frame 93 to tension the plate and make it flat. It should be noted that a support rod is also provided inside the placement frame 8. The inner bottom wall of the U-shaped chuck 98 and the upper surface of the support rod are on the same plane. The two work together to support the bottom of the plate. A stamping die can be installed between the support rods to cooperate with the work of the stamping mechanism 4.

[0030] Both the locking bolt 97 and the clamping bolt 99 are equipped with anti-slip pads at their bottom ends. The anti-slip pads are rubber pads. The design of the anti-slip pads can protect the metal structure on the one hand, and provide anti-slip performance on the other hand, preventing the fixed structure from sliding during the processing of the sheet metal. The anti-slip pads adopt a detachable structure for easy replacement after wear. The thickness of the anti-slip pads is designed according to the clamping requirements, generally 2-5mm. When the rubber pads come into contact with the metal surface, they can generate a large static friction force, which can effectively prevent the sheet metal and the guide frame 93 from sliding even under the vibration generated by stamping and laser cutting, ensuring the stability and processing accuracy of the processing process.

[0031] The tensioning assembly 910 includes a tensioning motor 9101 and a tensioning screw 9102. The tensioning motor 9101 is installed at the other end of the guide frame 93. Both ends of the tensioning screw 9102 are located inside the guide frame 93 and are movably connected to both ends of the guide frame 93, respectively. The output end of the tensioning motor 9101 is fixedly connected to one end of the tensioning screw 9102 to drive the tensioning screw 9102 to rotate. The tensioning screw 9102 is threadedly connected to the drive screw hole in the middle of the guide block 94.

[0032] After clamping and fixing the four corners of the sheet metal using U-shaped chucks 98 and clamping bolts 99, the tensioning motor 9101 is started to drive the tensioning screw 9102 to rotate, causing the guide block 94 to move in the direction of the tensioning motor 9101 within the guide frame 93, pre-tensioning the sheet metal from the four corners. The drive power of the tensioning motor 9101 is selected according to processing requirements and is manually controlled to start and stop. Furthermore, by detecting the torque change of the tensioning motor 9101, the start and stop timing of the tensioning motor 9101 can be selected. The tensioning motor 9101 is a micro servo motor, which is small in size and light in weight, making it easy to install on the guide frame 93. The motor is equipped with an encoder to achieve precise feedback and control of speed and position. It is also equipped with a torque sensor to detect the output torque of the tensioning motor 9101 in real time. When the torque reaches the preset value, it indicates that the sheet metal has been tensioned to the preset state. At this time, the motor can be automatically controlled to stop rotating to avoid damage to the sheet metal due to excessive tension or poor flatness of the sheet metal due to insufficient tension.

[0033] The placement frame 8 includes two half-frames, and a plug rod 11 is fixedly connected to one side of each half-frame. The plug rod 11 is inserted into a slot 12 at the corresponding position on the other half-frame. A positioning screw hole 13 is provided on the other half-frame at the position corresponding to the slot 12. A positioning bolt 14 is threaded into the positioning screw hole 13. Adjusting the length of the plug rod 11 inserted into the slot 12 can adjust the distance between the two half-frames to accommodate different sized boards.

[0034] The clamping mechanism 6 includes a guide rail 61, guide sliders 62, connecting rods 63, variable-diameter clamping wheels 64, a positioning plate 65, a snap-fit ​​groove 66, a ratchet structure 67, and a movable plate 68. The guide rail 61 is located on one side of the upper surface of the placement frame 8. Two guide sliders 62 are slidably connected within the guide rail 61. The movable plate 68 is connected to the guide sliders 62 via a hinge made of stainless steel, allowing for flexible rotation of the movable plate 68 and facilitating adjustment of the angle of the connecting rod 63. One end of the connecting rod 63 is movably connected to the movable plate 68. The positioning plate 65 is fixedly connected to the other side of the upper surface of the placement frame 8. The upper surface of the positioning plate 65 has several equidistantly arranged... The snap-fit ​​groove 66 is shaped to match the snap-fit ​​magnetic block 672 on the ratchet structure 67. The equidistant arrangement of the snap-fit ​​groove 66 allows for multi-position adjustment of the connecting rod 63, adapting to the clamping requirements of plates of different widths. The end of the connecting rod 63 away from the guide slider 62 is provided with a ratchet structure 67, which snaps into the snap-fit ​​groove 66. Several irregularly shaped variable-diameter clamping wheels 64 are sleeved on the connecting rod 63 and are located between the guide slider 62 and the ratchet structure 67. The connecting rod 63 has a polygonal cross-section, using a square, hexagonal, or other polygonal structure to prevent the irregularly shaped variable-diameter clamping wheels 64 from rotating circumferentially on the connecting rod 63, ensuring the reliability of power transmission and the accuracy of positioning.

[0035] Please see Figure 10The ratchet structure 67 includes an outer ring 671, engaging magnetic blocks 672, retaining rings 673, an inner ring 674, ratchet teeth 675, a limiting spring 676, and a pawl 677. Two retaining rings 673 are sleeved on the connecting rod 63 and do not rotate with the connecting rod 63. The outer ring 671 is fixedly connected between the two retaining rings 673, and several engaging magnetic blocks 672 are fixedly connected to the outer ring 671 to engage with the engaging slots 66. (See also...) Figure 2 The snap-fit ​​magnetic block 672 uses a magnet and can be attracted into the groove in the snap-fit ​​groove 66 to attract and fix the outer ring 671. The magnet is a strong magnet that can withstand the reaction force formed by the irregular diameter pressing wheel 64 pressing the plate. It requires the operation of the operator to detach the outer ring 671 from the snap-fit ​​groove 66. The inner ring 674 is sleeved on the connecting rod 63 and is located between the two retaining rings 673. The inner wall of the outer ring 671 is provided with ratchet 675. One end of the pawl 677 is movably connected in the groove opened on the outer side of the inner ring 674. A limit spring 676 is also movably connected between the pawl 677 and the inner wall of the groove so that the other end of the pawl 677 extends out of the groove and contacts the ratchet 675.

[0036] The inner ring 674 is sleeved on the connecting rod 63, allowing the ratchet structure 67 to move on the connecting rod 63 to adapt to the length changes of the placement frame 8 after adjustment. This ensures that the ratchet structure 67 can be locked in the locking groove 66. After the outer ring 671 is locked in the locking groove 66, it will be limited and cannot rotate. Then, rotating the connecting rod 63 will drive the irregular diameter clamping wheel 64 to rotate. With the change of radius, the plate can be clamped. The two sets of irregular diameter clamping wheels 64 cooperate to pull the positions on both sides of the plate processing position outward, making the processing position more flat and meeting the positioning requirements of high-precision processing. Due to the restriction of the ratchet structure 67, the irregular diameter clamping wheel 64 clamping the plate will not rotate back. After the plate processing is completed, the connecting rod 63 is lifted upward to make the outer ring 671 disengage from the locking groove 66, which will allow the irregular diameter clamping wheel 64 to disengage from the plate surface.

[0037] The variable diameter clamping roller 64 has a wheel-shaped structure with a gradually changing diameter. The wheel body is made of rubber or polyurethane, which has good elasticity and wear resistance. The gradually changing diameter structure can achieve stable adjustment of clamping force and avoid damage to the plate due to excessive instantaneous pressure. There are no less than two variable diameter clamping rollers 64 on a single connecting rod 63. Multiple clamping rollers can achieve multi-point clamping of the plate, ensuring uniform clamping and avoiding warping of the plate due to inadequate local clamping. At the same time, the operator can adjust the position of the variable diameter clamping roller 64 according to the clamping requirements to perform targeted clamping of the plate. The two connecting rods 63 are set in parallel.

[0038] When this equipment is working, the length of the placement frame 8 is adjusted based on the size of the material to be processed. After adjustment, the positioning bolts 14 are tightened for fixation. The material to be processed is placed on the placement frame 8, and each U-shaped chuck 98 is moved to insert into the corner of the material. The clamping bolts 99 are tightened to clamp the material. The tensioning motor 9101 is started to pre-tighten the material from the four corners. After the initial tensioning is completed, the two connecting rods 63 are lifted and the guide slider 62 is moved to correspond to the outer periphery of the material processing position. The connecting rods 63 are lowered so that the outer ring 671 is engaged in the slot 66. Then, the operator simultaneously rotates... The two connecting rods 63 drive the irregular diameter clamping wheel 64 to rotate, so that its outer wall contacts the plate and gradually presses the plate surface. The irregular diameter clamping wheel 64 is fixed by the pawl 677 and ratchet 675, thus completing the clamping of the plate at the processing position. During processing, the drive motor drives the sliding plate 10 to push the placement frame 8 to move on the machine table 1. After passing through the gantry, the plate is first processed by the impact mechanism 4 and then by the laser cutting mechanism 3. After processing is completed, the connecting rods 63 are lifted to make the irregular diameter clamping wheel 64 disengage from the plate, and the clamping bolts 99 are loosened to release the plate waste.

[0039] In summary, this adjustable clamping device, through the design of the clamping mechanism, can clamp and position the sheet metal from the four corners. Combined with the tensioning component, it can tighten the sheet metal from the four corners, ensuring a flat surface. Furthermore, the pressing mechanism further presses down on the processing positions on the sheet metal, ensuring that the clamping and positioning of the sheet metal meets the requirements of high-precision processing. Moreover, based on the adjustable structure of the placement frame, it can meet the clamping needs of sheets of different sizes, thus solving the problems mentioned in the background technology.

[0040] The clamping mechanism, combined with the holding mechanism, forms multi-point clamping at the four corners and the processing surface of the board, ensuring the flatness of the processing surface. It is also compatible with the adjustable structure of the frame and the position of the irregular diameter clamping rollers is adjustable, which can be used to clamp different points on the board. It is easy to operate and has a simple structure.

[0041] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An adjustable clamping device for stamping laser composite processing, comprising a machine base, a gantry frame disposed on the upper surface of the machine base, a laser cutting mechanism mounted on the gantry frame via an XY-axis drive mechanism, a stamping mechanism also mounted on the gantry frame, spur gear drive rails mounted on both sides of the upper surface of the machine base, sliding plates and sliding blocks slidably connected on the spur gear drive rails, a drive motor mounted on the sliding plates to drive the sliding plates to slide on the spur gear drive rails, and a placement frame fixedly mounted between the two sliding plates and the two sliding blocks at four points, characterized in that: The four corners of the placement frame are equipped with clamping mechanisms to clamp the four corners of the board, and the two sides of the placement frame are equipped with pressing mechanisms to press and flatten the processing surface of the board. The clamping mechanism includes a sector-shaped disk, a movable shaft, a guide frame, a guide block, a guide groove, a guide shaft, a locking bolt, a U-shaped chuck, a clamping bolt, and a tensioning assembly. The sector-shaped disk is installed at the corner of the placement frame. The movable shaft is movably connected to the center of the sector-shaped disk. One end of the guide frame is fixedly connected to the movable shaft. A guide block is slidably connected inside the guide frame. The guide groove is opened on the sector-shaped disk and is concentric with the sector-shaped disk. The other end of the guide frame is fixedly connected to the guide shaft, which is slidably connected inside the guide groove. A locking bolt is threaded onto the guide frame. Tightening the locking bolt presses it onto the sector-shaped disk to fix the position of the guide frame. A U-shaped chuck is fixedly connected to the top of the guide block. A clamping bolt is threaded onto the top of the U-shaped chuck. Tightening the clamping bolt presses down on the plate to clamp its corners. A tensioning assembly is also provided on the guide frame to tighten the plate and make it flat.

2. The adjustable clamping device for stamping laser composite processing according to claim 1, characterized in that: The tensioning assembly includes a tensioning motor and a tensioning screw. The tensioning motor is installed at the other end of the guide frame. Both ends of the tensioning screw are located inside the guide frame and are movably connected to both ends of the guide frame. The output end of the tensioning motor is fixedly connected to one end of the tensioning screw to drive the tensioning screw to rotate. The tensioning screw is threadedly connected to the drive screw hole in the middle of the guide block.

3. The adjustable clamping device for stamping laser composite processing according to claim 2, characterized in that: The placement frame includes two half-frames, and a rod is fixedly connected to one side of each half-frame. The rod is inserted into a slot at the corresponding position on the other half-frame, and a positioning screw hole is opened at the corresponding slot position on the other half-frame. A positioning bolt is threaded into the positioning screw hole. Adjusting the insertion length of the rod into the slot can adjust the distance between the two half-frames to accommodate different sized boards.

4. The adjustable clamping device for stamping laser composite processing according to claim 3, characterized in that: The clamping mechanism includes a guide rail, a guide slider, a connecting rod, a variable-diameter clamping wheel, a positioning plate, a snap-fit ​​groove, a ratchet structure, and a movable plate. The guide rail is located on one side of the upper surface of the placement frame. Two guide sliders are slidably connected within the guide rail. A movable plate is hinged to the guide slider. One end of the connecting rod is movably connected to the movable plate. The positioning plate is fixedly connected to the other side of the upper surface of the placement frame. The upper surface of the positioning plate has several equidistant snap-fit ​​grooves. A ratchet structure is located at the end of the connecting rod away from the guide slider. The ratchet structure snaps into the snap-fit ​​groove. Several variable-diameter clamping wheels are sleeved on the connecting rod and positioned between the guide slider and the ratchet structure. The connecting rod has a polygonal cross-section.

5. The adjustable clamping device for stamping laser composite processing according to claim 4, characterized in that: The ratchet structure includes an outer ring, a locking magnetic block, a retaining ring, an inner ring, ratchet teeth, a limiting spring, and a pawl. Two retaining rings are sleeved on the connecting rod, and the outer ring is fixedly connected between the two retaining rings. Several locking magnetic blocks are fixedly connected to the outer ring to engage with the locking grooves. The inner ring is sleeved on the connecting rod and is located between the two retaining rings. The inner wall of the outer ring is provided with ratchet teeth. One end of the pawl is movably connected in a groove on the outer side of the inner ring. A limiting spring is also movably connected between the pawl and the inner wall of the groove, so that the other end of the pawl extends out of the groove and contacts the ratchet teeth.

6. The adjustable clamping device for stamping laser composite processing according to claim 4, characterized in that: The irregular diameter clamping wheel is a wheel-shaped structure with a gradually changing diameter. There are no fewer than two irregular diameter clamping wheels on a single connecting rod, and the two connecting rods are arranged in parallel.

7. The adjustable clamping device for stamping laser composite processing according to claim 6, characterized in that: Both the locking bolt and the clamping bolt are provided with anti-slip pads at their bottom ends, and the anti-slip pads are rubber pads.

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