Automobile seat framework laser cutting device

Abstract

The application relates to the field of automobile seat framework cutting, in particular to a laser cutting equipment for automobile seat framework, which comprises a workbench and the like; support wheels are fixedly connected to the left and right sides of the top of the workbench; a guide frame is fixedly connected to the middle of the top of the workbench; a fixed mounting frame is arranged on the right part of the guide frame; a movable mounting frame is arranged on the left part of the guide frame in a sliding mode; a cylinder is connected between the movable mounting frame and the fixed mounting frame; and a material placing mechanism is arranged in the movable mounting frame and the fixed mounting frame. The application adopts a differentiated repulsion driving strategy of multiple electromagnets which are independently controllable, has the outstanding advantages of fast response speed, high adjustment precision, non-contact wear and the like, and the like, and the corresponding magnetic blocks are arranged in a same-pole opposite mode between the electromagnets, so that even if the controller is temporarily powered off, the repulsion force will not disappear or be reversed in polarity instantaneously, and the system stability is higher.

Description

Technical Field

[0001] This invention relates to the field of automotive seat frame cutting, and more particularly to a laser cutting device for automotive seat frames. Background Technology

[0002] In the manufacturing process of automotive seat frames, steel tube cutting is one of the key steps determining the quality of the finished product and production efficiency. Traditional mechanical cutting and flame cutting methods have significant shortcomings in terms of processing efficiency, cutting accuracy, and cross-sectional quality, making it difficult to meet the high-precision and high-efficiency production requirements of modern automotive manufacturing. With the continuous development of laser cutting technology, its advantages of high precision, high efficiency, and high flexibility have been widely recognized in the field of metal tube processing. Especially in the application of steel tube cutting for automotive seat frames, laser cutting, with its significant characteristics such as non-contact processing, small heat-affected zone, and narrow and smooth kerf, has gradually replaced traditional cutting methods and become the preferred process in this field.

[0003] Chinese patent CN120828217B discloses a laser cutting device for automotive seat frames. This device uses a movable clamping platform and divides the loading and unloading areas by a laser cutting main control mechanism. The unloading area is equipped with a loading ramp, a first blocking mechanism, and a blocking upright mechanism. By controlling the distance between the side wall of the loading ramp and the blocking upright mechanism to be greater than the set length of the steel pipe to be cut, the problem of deformation caused by the end of the steel pipe hitting the bottom of the collection box when it falls after cutting is effectively solved, thus improving the product yield.

[0004] However, existing seat frame steel tubes still face significant clamping accuracy issues during laser cutting. Automotive seat frame steel tubes are typically manufactured through processes such as bending and forming. After forming, the tubes inevitably exhibit geometric defects such as localized ellipticity deviations, surface ripples, and shape deformation due to residual stress. These factors make it difficult to achieve high-precision coaxial positioning of the steel tube during clamping. During laser cutting, the steel tube usually needs to rotate at high speed to achieve continuous circumferential cutting. At this point, even a small amount of eccentricity (e.g., greater than 0.1 mm) can cause significant radial runout. Radial runout will cause the laser focus to deviate from the optimal position on the tube wall, resulting in uneven kerf width, mismatch between the cutting trajectory and the programmed path, and consequently, a series of cutting defects such as notches, incomplete cuts, and beveled surfaces.

[0005] Therefore, there is an urgent need to develop a laser cutting device for automotive seat frames that can maintain the laser focal length so that the frame can be cut in the optimal position. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the present invention provides a laser cutting device for automotive seat frames that can maintain the laser focal length so that the frame can be cut in the optimal position.

[0007] The technical solution of the present invention is: a laser cutting equipment for automotive seat frames, comprising a worktable, support wheels, and a guide frame. The support wheels are fixedly connected to the left and right sides of the top of the worktable, and the guide frame is fixedly connected to the middle of the top of the worktable. A fixed mounting frame is fixedly provided on the right side of the guide frame, and a movable mounting frame is slidably provided on the left side of the guide frame. A cylinder connects the movable mounting frame and the fixed mounting frame. A feeding mechanism is provided in both the movable mounting frame and the fixed mounting frame. The feeding mechanism can drive the workpiece to rotate and maintain the focal length between the workpiece and the laser cutting mechanism. A mounting ring is fixedly connected to the left side of the fixed mounting frame, and the laser cutting mechanism is mounted above the mounting ring. A connecting ring is provided on the right side of the fixed mounting frame, and a radar scanner is provided inside the connecting ring.

[0008] In one embodiment, the feeding mechanism includes a rotating mechanism for driving the workpiece to rotate, a focus holding mechanism mounted on the rotating mechanism, and a clamping mechanism mounted on the focus holding mechanism.

[0009] In one embodiment, the rotating mechanism includes a rotating ring concentrically mounted on a fixed mounting frame and a movable mounting frame. A gear ring is concentrically provided on the outer surface of the rotating ring. A rotary motor is fixedly connected to both the fixed mounting frame and the movable mounting frame. A first pinion gear that meshes with the gear ring is connected to the output shaft of the rotary motor.

[0010] In one embodiment, the focus holding mechanism includes a ring of electromagnets mounted on the inner walls of a fixed mounting frame and a movable mounting frame. The electromagnets are connected to the radar scanner signal. The focus holding mechanism also includes a hinge rod, a swing ring, and a magnetic block. The swing ring is placed at the center of a rotating ring. A ring of hinge rods is hinged between the rotating ring and the swing ring. A ring of magnetic blocks is provided on the outer surface of the swing ring.

[0011] In one embodiment, the clamping mechanism includes a rotating plate concentrically mounted on a swing ring, the rotating plate having an arc-shaped hole, a clamping motor fixedly connected to the swing ring, a second pinion connected to the output shaft of the clamping motor, an arc-shaped rack meshing with the second pinion on the edge of the rotating plate, a ring of clamping plates slidably arranged radially inside the swing ring, adjacent clamping plates being staggered, and a hollow shaft fixedly connected to the side wall of the clamping plate, the hollow shaft passing through the adjacent arc-shaped hole.

[0012] In one embodiment, the clamping mechanism further includes an air inlet connector that docks with the outer end of the hollow shaft, and the clamping plate has multiple air holes that communicate with the hollow shaft thereon.

[0013] In one embodiment, the laser cutting mechanism includes a first electric track symmetrically arranged on the upper part of the mounting ring, and a laser cutting head is connected between the drive blocks of the first electric track.

[0014] In one embodiment, a grinding mechanism is further included at the lower part of the mounting ring. The grinding mechanism includes a second electric track symmetrically arranged at the lower part of the mounting ring. A lifting plate is connected between the drive blocks of the second electric track. A mounting plate is provided on the top of the lifting plate. Top blocks are vertically slidably connected to the left and right sides of the mounting plate. A piston rod is connected to the bottom of each top block. A piston cylinder is fixedly connected to the lifting plate below the piston rod. The piston rod passes through the piston cylinder below it and is connected to the piston inside the piston cylinder. Moving plates are slidably connected to the left and right sides of the mounting plate. An air bag is connected between the opposite surfaces of the moving plates. Sandpaper is inserted between the outer surfaces of the moving plates. A connecting pipe is provided between the air bag and the bottom of the piston cylinder.

[0015] In one embodiment, a retractable enclosure is provided between the opposite surfaces of the fixed mounting frame and the movable mounting frame. The enclosure has outwardly protruding openings at both the upper and lower parts. The upper opening of the enclosure is connected to the laser cutting head, and the lower opening of the enclosure is connected to the lifting plate. The side wall of the enclosure is also connected to and communicates with a connecting pipe.

[0016] The beneficial effects are as follows: This invention employs a differentiated repulsion drive strategy with multiple independently controllable electromagnets, which has outstanding advantages such as fast response speed, high adjustment accuracy, stepless continuous adjustment, and no contact wear. Furthermore, each electromagnet and its corresponding magnetic block are set with the same pole relative to each other, so even if the controller loses power briefly, the repulsive force will not disappear instantly or the polarity will reverse, resulting in higher system stability. This technical solution effectively solves the industry problem of the difficulty in precisely compensating for geometric deviations left over from the forming process in laser cutting of automotive seat frame steel tubes, significantly improving the quality of the cut surface and the product yield. At the same time, it provides a reliable technical guarantee for achieving high-precision, high-speed, and high-stability automated laser cutting. Multiple air holes are made in the clamping plate, which are connected to the air inlet connector and external air source through a hollow shaft. During the cutting process, high-pressure gas is blown evenly to the workpiece clamping area through the air holes, forming a dense protective air film between the clamping plate and the workpiece. This film acts as a buffer and isolates the workpiece, effectively preventing damage such as indentations and scratches on the workpiece surface caused by excessive clamping force or workpiece rotation friction. At the same time, the continuously ejected gas forms an air curtain barrier around the clamping position, which seals and blocks impurities such as metal dust and slag generated during cutting. This prevents impurities from leaking into the clamping mechanism along the clamping gap, avoiding impurities from entering the precision moving parts such as the gear ring and hinge rod, which would affect the transmission accuracy and service life. This ensures the long-term stability and reliability of the clamping mechanism. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the components on the guide frame of the present invention.

[0019] Figure 3 For the present invention Figure 2 A schematic diagram of the three-dimensional structure from another perspective.

[0020] Figure 4 This is a three-dimensional structural diagram of the clamping mechanism of the present invention.

[0021] Figure 5 This is a three-dimensional structural diagram of the component on the rotating ring of the present invention.

[0022] Figure 6 This is a three-dimensional structural diagram of the inner component of the rotating ring of the present invention.

[0023] Figure 7 This is a diagram showing the installation position of the clamping plate of the present invention.

[0024] Figure 8 This is a three-dimensional structural diagram of the component on the mounting ring of the present invention.

[0025] Figure 9 This is a three-dimensional structural diagram of the laser cutting mechanism and the grinding mechanism of the present invention.

[0026] Figure 10 This is a three-dimensional structural diagram of the grinding mechanism of the present invention.

[0027] Figure 11 This is a three-dimensional structural diagram of the components on the lifting plate of the present invention.

[0028] In the attached diagram, the following are the reference numerals: 1-Workbench, 2-Support wheel, 3-Guide frame, 4-Fixed mounting frame, 41-Cylinder, 5-Moving mounting frame, 6-Discharging mechanism, 61-Rotating ring, 62-Gear ring, 63-Rotary motor, 64-First pinion, 65-Electromagnet, 66-Hinge rod, 67-Swing ring, 68-Magnetic block, 69-Rotating plate, 610-Arc-shaped hole, 611-Clamping motor, 612-Second pinion, 613-Arc-shaped rack, 614-Hollow shaft, 615-Clamping plate, 61 6-Air vent, 617-Air inlet connector, 7-Connecting ring, 71-Radar scanner, 8-Mounting ring, 9-Laser cutting mechanism, 91-First electric track, 92-Laser cutting head, 10-Grinding mechanism, 101-Second electric track, 102-Lifting plate, 103-Mounting plate, 104-Top block, 105-Piston rod, 106-Piston cylinder, 107-Moving plate, 108-Airbag, 109-Sandpaper, 1010-Connecting pipe, 11-Sealing cover, 12-Connecting pipe. Detailed Implementation

[0029] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0030] Example: Figures 1-7 As shown, a laser cutting device for automotive seat frames, with... Figure 1 For reference, the equipment is installed horizontally extending left and right. The equipment includes a worktable 1, support wheels 2, and a guide frame 3. The support wheels 2 are fixed to the top left and right sides of the worktable 1 and extend forward and backward. The diameter of the support wheels 2 tapers from both ends towards the middle, making the middle part of the support wheels the narrowest. Workpieces pass through the narrowest part to facilitate workpiece transport and positioning. The guide frame 3 is fixed to the middle of the top of the worktable 1 and consists of support plates on the left and right sides and guide shafts extending horizontally left and right. A fixed mounting frame 4 is fixedly installed on the right side of the guide frame 3, and a movable mounting frame 5 is slidably installed on the left side of the guide frame 3. A cylinder 41 connects the movable mounting frame 5 and the fixed mounting frame 4, driving the movable mounting frame 5 to move left or right. The distance between the moving mounting frame 5 and the fixed mounting frame 4 is changed. Both the moving mounting frame 5 and the fixed mounting frame 4 are equipped with a feeding mechanism 6. The feeding mechanism 6 drives the workpiece to rotate by rotation and maintains the focal length between the workpiece and the laser cutting mechanism 9, allowing the laser cutting mechanism 9 to cut the workpiece at the optimal position. A mounting ring 8 is fixed to the left side of the fixed mounting frame 4, and the laser cutting mechanism 9 is mounted above the mounting ring 8. The vertical position of the laser cutting mechanism 9 can be changed. A connecting ring 7 is provided on the right side of the fixed mounting frame 4, and a radar scanner 71 is installed inside the connecting ring 7. The connecting ring 7 serves as the workpiece inlet. The radar scanner 71 scans the workpiece and transmits the signal to the feeding mechanism 6, enabling the feeding mechanism 6 to change the position of the workpiece in real time.

[0031] Before operation, the equipment drives the moving mounting frame 5 to slide left or right relative to the fixed mounting frame 4 along the guide optical axis of the guide frame 3 according to the axial length of the workpiece to be cut. This adjusts the distance between the moving mounting frame 5 and the fixed mounting frame 4, so that the clamping span of the two feeding mechanisms 6 matches the length of the workpiece. At the same time, the support wheels 2 on the left and right sides support the workpiece at their narrowest point, ensuring the initial positioning and smooth conveying of the workpiece in the horizontal direction.

[0032] The workpiece enters the equipment through the connecting ring 7 (i.e., the feed port), passes sequentially through the unloading mechanism 6 within the fixed mounting frame 4 and the moving mounting frame 5, and is clamped by the unloading mechanism 6. During the workpiece's entry, a radar scanner 71 located within the connecting ring 7 performs real-time circumferential scanning detection on the workpiece surface, acquiring contour data such as the workpiece's cross-sectional shape, ellipticity deviation, surface ripples, and eccentricity, and transmits the detection signals to the unloading mechanism 6 in real time. Based on the received signals, the unloading mechanism 6 actively adjusts the workpiece's radial position while driving it to rotate around its own axis, compensating for the workpiece's geometric deformation and clamping eccentricity, ensuring that the workpiece axis always maintains the optimal distance from the preset processing focus of the laser cutting mechanism 9, thereby ensuring that the laser focus accurately falls on the target cutting position on the tube wall.

[0033] The laser cutting mechanism 9 on the mounting ring 8 can be adjusted vertically as needed to coordinate with the radial adjustment of the feeding mechanism 6, further optimizing focal length matching. The radar scanner 71 continuously monitors the workpiece status, and the feeding mechanism 6 responds to the signal to perform closed-loop dynamic adjustment, thereby effectively suppressing high-speed rotational radial runout caused by workpiece forming errors, ensuring uniform kerf and accurate trajectory. After cutting, the workpiece is output from the left side of the equipment, completing the entire processing cycle.

[0034] like Figures 4-7 As shown, the feeding mechanism 6 includes a rotating mechanism that drives the workpiece to rotate, a focus holding mechanism mounted on the rotating mechanism, and a clamping mechanism mounted on the focus holding mechanism. The workpiece is placed from the right side of the equipment, and the support wheel 2 supports the workpiece. When the workpiece moves to the cutting position below the laser cutting mechanism 9, the workpiece is clamped by the clamping mechanism. The rotating mechanism drives the workpiece to rotate and change the cutting position. The focus holding mechanism maintains the cutting focus of the workpiece, thereby completing the cutting of the workpiece.

[0035] When the workpiece to be cut moves to below the laser cutting mechanism 9, the clamping mechanism in the unloading mechanism 6 activates to clamp and fix the workpiece. Subsequently, the rotating mechanism drives the workpiece to rotate around its own axis to continuously change the circumferential cutting position of the workpiece. During the workpiece feeding process, a radar scanner 71 located in the connecting ring 7 on the right side of the fixed mounting frame 4 scans the workpiece surface in real time, acquiring detection signals such as the workpiece's contour deviation and eccentricity, and transmitting the signals to the focus holding mechanism in the unloading mechanism 6 in real time. Based on the received signals, the focus holding mechanism dynamically adjusts the radial position of the workpiece while it continues to rotate, actively compensating for radial runout caused by factors such as the workpiece's own ellipticity, corrugations, or clamping eccentricity, so that the laser focus is always accurately maintained at the optimal position on the tube wall, thereby maintaining a constant cutting focal length.

[0036] like Figure 4 As shown, the rotating mechanism includes a rotating ring 61, a gear ring 62, a rotary motor 63, and a first pinion 64. The rotating ring 61 is concentrically mounted on the inner walls of both the fixed mounting frame 4 and the movable mounting frame 5. The gear ring 62 is concentrically arranged on the outer surface of the rotating ring 61. The rotary motor 63 is fixedly connected to the upper part of both the fixed mounting frame 4 and the movable mounting frame 5. The first pinion 64, which meshes with the gear ring 62, is connected to the output shaft of the rotary motor 63. The first pinion 64 is driven to rotate by the rotary motor 63, so that the gear ring 62 and the rotating ring 61 rotate synchronously.

[0037] like Figures 5-7 As shown, the focus holding mechanism includes an electromagnet 65, a hinge rod 66, a swing ring 67, and a magnet 68. A ring of electromagnets 65 is provided on the inner walls of both the fixed mounting frame 4 and the movable mounting frame 5. The electromagnets 65 are signal-connected to the radar scanner 71. The swing ring 67 is placed at the center of the rotating ring 61. A ring of hinge rods 66 is hinged between the rotating ring 61 and the swing ring 67, allowing the swing ring 67 to deflect at any angle within the rotating ring 61. A ring of magnets 68 is provided on the outer surface of the swing ring 67. By controlling the corresponding electromagnet 65 to be energized, the magnetic force can attract the swing ring 67 to move towards the electromagnet 65, causing the workpiece to deflect in that direction.

[0038] like Figure 6 and Figure 7As shown, the clamping mechanism includes a rotating plate 69, a clamping motor 611, a second pinion 612, an arc-shaped rack 613, a hollow shaft 614, and a clamping plate 615. A rotating plate 69 is concentrically mounted on each of the swing rings 67. An arc-shaped hole 610 extending from the inside out is formed on the rotating plate 69. A clamping motor 611 is fixedly connected to the upper part of the swing rings 67. A second pinion 612 is connected to the output shaft of the clamping motor 611. An arc-shaped rack 613 meshing with the second pinion 612 is provided on the edge of the rotating plate 69. The clamping mechanism is controlled by the clamping motor 611. The second pinion 612 is driven to rotate, which in turn drives the rotating plate 69 to rotate synchronously through the arc-shaped rack 613. A ring of clamping plates 615 is slidably arranged radially inside the swing ring 67. The two adjacent clamping plates 615 are staggered, so the clamping plates 615 will not interfere with each other when they move inward. A hollow shaft 614 is fixed to the side wall of the clamping plate 615. The hollow shaft 614 passes through the adjacent arc-shaped hole 610. When the rotating plate 69 rotates clockwise, the hollow shaft 614 is driven to move inward through the arc-shaped hole 610, so that the clamping plate 615 moves inward to clamp the workpiece.

[0039] When the workpiece is placed from the right side of the equipment and moved below the laser cutting mechanism 9, the unloading mechanism 6 begins to operate. First, the clamping mechanism starts: the clamping motor 611 drives the second pinion 612 to rotate, which in turn drives the rotating plate 69 to rotate synchronously through the arc-shaped rack 613 meshing with it. The arc-shaped hole 610 on the rotating plate 69 pushes the hollow shaft 614 passing through it as it rotates, causing the clamping plates 615, which slide radially along the swing ring 67, to move inward without interference in a staggered arrangement, thereby clamping and fixing the workpiece. Subsequently, the rotating mechanism starts to work: the rotating motor 63 drives the first pinion 64 to rotate, which in turn drives the rotating ring 61 to rotate concentrically on the inner wall of the fixed mounting frame 4 or the moving mounting frame 5 through meshing with the gear ring 62. The rotating ring 61 drives the swing ring 67, the clamping mechanism mounted on it, and the workpiece to rotate together around its own axis through the hinge rod 66, so as to continuously change the circumferential cutting position of the workpiece.

[0040] During the workpiece feeding process, a ring of radar scanners 71 installed within the connecting ring 7 continuously scans and detects the workpiece circumferentially, acquiring real-time contour data of the workpiece surface, including parameters such as ellipticity deviation, surface waviness, cross-sectional shape error, and eccentricity caused by clamping. The radar scanners 71 transmit the acquired detection signals to the control system in real time. The control system processes and analyzes the received signals, calculates the deviation vector between the workpiece's current actual axial position and the theoretical reference position, including the direction and magnitude of the deviation, and determines the target magnetic force required to be generated by the electromagnets 65 at various positions on the inner walls of the mounting frame 4 and the moving mounting frame 5 based on this deviation vector.

[0041] Both the fixed mounting frame 4 and the movable mounting frame 5 have a ring of electromagnets 65 installed on their inner walls. Each electromagnet 65 is independently controlled by the control system, which can independently adjust the current flowing through each electromagnet 65 according to the control signal, thereby generating magnetic forces of different intensities. A ring of magnetic blocks 68 is installed on the outer surface of the swing ring 67 at positions corresponding to each electromagnet 65. During installation, each magnetic block 68 and its corresponding electromagnet 65 are arranged with like poles facing each other, ensuring that there is always a repulsive magnetic force between the magnetic blocks 68 and their corresponding electromagnets 65.

[0042] When the radar scanner 71 detects a deviation in the workpiece position, the control system, based on the calculated deviation vector, differentially adjusts the current flowing through each electromagnet 65: at the electromagnet 65 corresponding to the direction in which the workpiece needs to be offset, the control system reduces its current, thus decreasing the magnetic force it generates; conversely, on the side opposite to the offset direction, the control system increases its current, thus increasing the magnetic force it generates. Since each electromagnet 65 generates a repulsive magnetic force with its corresponding magnetic block 68, the oscillating ring 67 is subjected to magnetic forces from all directions, and the direction and magnitude of the resultant force depend on the differential distribution of the magnetic forces of each electromagnet 65. Under the action of the resultant force, the oscillating ring 67 shifts towards the direction of the electromagnet 65 with the weaker magnetic force, that is, moves in the opposite direction of the deviation between the actual and theoretical axes of the workpiece, thereby pushing the workpiece axis back towards the theoretical reference position.

[0043] During the offset process of the swing ring 67, the rotating ring 61 and the swing ring 67 are hinged together by a hinge rod 66. The two ends of the hinge rod 66 are hinged to the rotating ring 61 and the swing ring 67 respectively, so that the swing ring 67 can generate radial offset at any angle relative to the center of the rotating ring 61 inside the rotating ring 61. At the same time, the hinge constraint of the hinge rod 66 ensures that the swing ring 67 will not rotate relative to the rotating ring 61 during the offset process, ensuring that the circumferential angle of the clamping mechanism and the workpiece remains unchanged.

[0044] The radial offset of the swing ring 67 causes the clamping mechanism mounted on it and the clamped workpiece to move radially together, thereby actively compensating for radial runout caused by workpiece ellipticity deviation, surface ripples and other forming errors or clamping eccentricity, so that the actual axis of the workpiece always approaches the theoretical processing axis preset by the laser cutting mechanism 9. During this process, the radar scanner 71 continuously monitors the workpiece position in real time and continuously feeds the latest detection signal back to the control system. The control system then continuously and dynamically adjusts the magnetic force of each electromagnet 65 to form a closed real-time dynamic calibration loop, thereby ensuring that the laser focus is always accurately maintained at the optimal position on the tube wall during the entire process of high-speed rotating cutting of the workpiece, effectively avoiding cutting defects such as uneven kerf width, gaps, incomplete cuts and beveled surfaces caused by radial runout.

[0045] like Figure 7 As shown, the clamping mechanism also includes an air inlet connector 617 that is connected to the outer end of the hollow shaft 614. The air inlet connector 617 is connected to an external air source. Multiple air holes 616 are opened on the clamping plate 615. The air holes 616 are connected to the hollow shaft 614 on it. During the workpiece cutting process, gas is injected into the air holes 616 through the air inlet connector 617. The gas is blown towards the workpiece clamping part to form a protective air film to prevent the clamping plate 615 from damaging the workpiece. At the same time, an air curtain is formed to prevent cutting impurities from leaking out from the clamping position.

[0046] After the workpiece is clamped and enters the cutting state, the air inlet 617 of the clamping mechanism connects to an external air source. High-pressure gas enters the hollow shaft 614 through the air inlet 617 and is transported along the hollow shaft 614 to the inner cavity of the clamping plate 615, and finally sprays out from the multiple air holes 616 opened on the clamping plate 615. The sprayed gas is evenly blown onto the surface of the workpiece clamping part, forming a dense protective air film between the contact surface of the clamping plate 615 and the workpiece. This air film plays a buffering and isolation role, effectively preventing the clamping plate 615 from causing indentations or scratches on the workpiece surface due to excessive clamping force or friction during workpiece rotation. At the same time, the continuously sprayed gas forms an air curtain barrier around the clamping position. This air curtain seals and blocks metal dust, slag and other impurities generated in the external cutting area, preventing cutting impurities from leaking into the clamping mechanism and other parts of the equipment along the clamping gap, avoiding impurities from entering the moving parts of the mechanism and affecting the transmission accuracy and service life, while ensuring the cleanliness of the cutting area and the stable operation of the cutting process. During the cutting process, the airflow is continuously sprayed until the single cut is completed, at which point the air supply is stopped.

[0047] like Figure 8 and Figure 9 As shown, the laser cutting mechanism 9 includes a first electric track 91 and a laser cutting head 92. The first electric track 91 is vertically mounted and symmetrically arranged in the upper part of the mounting ring 8. The laser cutting head 92 is connected between the drive blocks of the first electric track 91. The height of the laser cutting head 92 can be changed by the first electric track 91, thereby adjusting the initial cutting focal length.

[0048] like Figures 8-11As shown, it also includes a grinding mechanism 10 disposed at the lower part of the mounting ring 8. The grinding mechanism 10 includes a second electric track 101, a lifting plate 102, a mounting plate 103, a top block 104, a piston rod 105, a piston cylinder 106, a moving plate 107, an airbag 108, sandpaper 109, and a connecting pipe 1010. The second electric track 101 is symmetrically arranged vertically at the lower part of the mounting ring 8. The lifting plate 102 is connected between the drive blocks of the second electric track 101. The mounting plate 103 is horizontally disposed at the top of the lifting plate 102. The top blocks 104 are vertically slidably connected to the left and right sides of the mounting plate 103. The piston rods 105 are connected to the bottom of the top blocks 104. The piston cylinder 106 is fixedly connected to the lifting plate 102 below the piston rod 105. The piston rod 105 passes through the piston cylinder 106 below it and is connected to the piston inside the piston cylinder 106. The left and right sides of the mounting plate 103 are slidably connected to the right and left sides. There is a movable plate 107, and an airbag 108 is connected between the opposite surfaces of the movable plate 107. Abrasive paper 109 is inserted between the outer surfaces of the movable plate 107. The abrasive paper 109 is arched upward. A connecting pipe 1010 is provided between the airbag 108 and the bottom of the piston cylinder 106. When the top block 104 moves upward, it will contact the lower left and right sides of the cut workpiece. The top of the top block 104 has rollers, which can reduce the friction between the top block 104 and the workpiece. When the abrasive paper 109 moves between the left and right workpiece cutting positions, the top block 104 moves downward, driving the piston rod 105 to move downward, so that the gas in the piston cylinder 106 enters the airbag 108 through the connecting pipe 1010, causing the airbag 108 to expand. The abrasive paper 109 opens to the left and right sides and contacts the workpiece cutting position. The rotating workpiece rubs against the abrasive paper 109, polishing the cutting position.

[0049] After the workpiece is cut, cylinder 41 drives the mounting frame 5 to move to the left, pulling the two cut parts of the workpiece apart axially by a certain distance, so that a gap is formed between the two cut end faces, allowing the grinding mechanism 10 to enter. Subsequently, the grinding mechanism 10 at the lower part of the mounting ring 8 starts to operate: the second electric track 101 drives its drive block to move the lifting plate 102 upward, so that the mounting plate 103 on the top of the lifting plate 102 and all the components mounted on it rise as a whole. During the ascent, the top blocks 104 on the left and right sides of the mounting plate 103 first contact the lower parts of the cut workpieces on the left and right sides. At this time, the mounting plate 103 continues to rise, and the top blocks 104 are pressed down by the workpieces and slide downward relative to the mounting plate 103. The downward movement of the top blocks 104 drives the piston rod 105 to move downward, pushing the piston in the piston cylinder 106 downward. The gas in the piston cylinder 106 is forced into the air bag 108 through the connecting pipe 1010. After the air bag 108 is inflated, it expands and opens to the left and right sides, pushing the moving plates 107 on the left and right sides to slide outward. This stretches the sandpaper 109 inserted between the outer surfaces of the moving plates 107 to the left and right sides, so that the sanding surface of the sandpaper 109 is in close contact with the cut end faces of the two workpieces on the left and right sides. At this time, the rotating mechanism drives the workpiece to rotate around its own axis. The rotating workpiece's cutting end face generates relative friction with the tensioned sandpaper 109. The sandpaper 109 continuously polishes the cutting end face, removing burrs, slag, and irregular contours produced during cutting, so that the cutting end face meets the processing requirements of being smooth and flat. After polishing is completed, the second electric track 101 drives the lifting plate 102 to descend and reset, and all components return to their positions, completing the entire polishing process.

[0050] like Figure 8 As shown, a retractable enclosure 11 is provided between the opposite surfaces of the fixed mounting frame 4 and the movable mounting frame 5. The enclosure 11 seals the cutting position of the workpiece to prevent the leakage of cutting fumes and impurities. The enclosure 11 has outward protruding openings at the top and bottom. The upper opening of the enclosure 11 is connected to the laser cutting head 92, and the lower opening of the enclosure 11 is connected to the lifting plate 102. The side wall of the enclosure 11 is also connected to and connected to a connecting pipe 12, which is connected to an external suction pump to suck away the fumes and impurities generated during cutting.

[0051] High-temperature fumes, metal dust, and splashing impurities generated during cutting or grinding operations are confined inside the enclosure 11 and cannot escape. Simultaneously, the connecting pipe 12, which communicates with the side wall of the enclosure 11, draws the accumulated fumes and suspended impurities from inside the enclosure 11 out of the equipment under the continuous suction of an external air pump. This effectively prevents harmful fumes and impurities from spreading into the workshop environment, protecting the occupational health of operators, and preventing impurities from adhering to the optical lens of the laser cutting head 92 or moving parts of the equipment, thus affecting processing accuracy and equipment lifespan.

[0052] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. All equivalent substitutions made within the principles of the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this invention belong to existing technology known to those skilled in the art.

Claims

1. A laser cutting device for automotive seat frames, characterized in that: The device includes a worktable (1), support wheels (2) and a guide frame (3). The support wheels (2) are fixed to the top left and right sides of the worktable (1), and the guide frame (3) is fixed to the middle of the top of the worktable (1). A fixed mounting frame (4) is fixedly installed on the right side of the guide frame (3), and a movable mounting frame (5) is slidably installed on the left side of the guide frame (3). A cylinder (41) is connected between the movable mounting frame (5) and the fixed mounting frame (4). A feeding mechanism (6) is provided in both the movable mounting frame (5) and the fixed mounting frame (4). The feeding mechanism (6) can drive the workpiece to rotate and maintain the focal length between the workpiece and the laser cutting mechanism (9). A mounting ring (8) is fixedly connected to the left side of the fixed mounting frame (4). The laser cutting mechanism (9) is installed above the mounting ring (8). A connecting ring (7) is provided on the right side of the fixed mounting frame (4). A radar scanner (71) is provided in the connecting ring (7).

2. The laser cutting equipment for automotive seat frames as described in claim 1, characterized in that: The feeding mechanism (6) includes a rotating mechanism for driving the workpiece to rotate, a focal length holding mechanism mounted on the rotating mechanism, and a clamping mechanism mounted on the focal length holding mechanism.

3. The laser cutting equipment for automotive seat frames as described in claim 2, characterized in that: The rotating mechanism includes a rotating ring (61) concentrically mounted on a fixed mounting frame (4) and a movable mounting frame (5). A gear ring (62) is concentrically arranged on the outer surface of the rotating ring (61). A rotary motor (63) is fixedly connected to both the fixed mounting frame (4) and the movable mounting frame (5). A first pinion (64) that meshes with the gear ring (62) is connected to the output shaft of the rotary motor (63).

4. The laser cutting equipment for automotive seat frames as described in claim 3, characterized in that: The focus holding mechanism includes a ring of electromagnets (65) installed on the inner walls of the fixed mounting frame (4) and the moving mounting frame (5). The electromagnets (65) are connected to the radar scanner (71) via signals. The focus holding mechanism also includes a hinge rod (66), a swing ring (67) and a magnetic block (68). The swing ring (67) is placed at the center of the rotating ring (61). A ring of hinge rods (66) is hinged between the rotating ring (61) and the swing ring (67). A ring of magnetic blocks (68) is provided on the outer surface of the swing ring (67).

5. The laser cutting equipment for automotive seat frames as described in claim 4, characterized in that: The clamping mechanism includes a rotating plate (69) concentrically mounted on a swing ring (67), a ring of arc-shaped holes (610) on the rotating plate (69), a clamping motor (611) fixedly connected to the swing ring (67), a second pinion (612) connected to the output shaft of the clamping motor (611), an arc-shaped rack (613) meshing with the second pinion (612) on the edge of the rotating plate (69), a ring of clamping plates (615) sliding radially inside the swing ring (67), two adjacent clamping plates (615) being staggered, a hollow shaft (614) fixedly connected to the side wall of the clamping plate (615), and the hollow shaft (614) passing through the adjacent arc-shaped hole (610).

6. The laser cutting equipment for automotive seat frames as described in claim 5, characterized in that: The clamping mechanism also includes an air inlet connector (617) that is connected to the outer end of the hollow shaft (614). The clamping plate (615) has multiple air holes (616) that are connected to the hollow shaft (614) thereon.

7. The laser cutting equipment for automotive seat frames as described in claim 1, characterized in that: The laser cutting mechanism (9) includes a first electric track (91) symmetrically arranged on the upper part of the mounting ring (8), and a laser cutting head (92) is connected between the drive blocks of the first electric track (91).

8. The laser cutting equipment for automotive seat frames as described in claim 1, characterized in that: It also includes a grinding mechanism (10) disposed at the lower part of the mounting ring (8). The grinding mechanism (10) includes a second electric track (101) symmetrically disposed at the lower part of the mounting ring (8). A lifting plate (102) is connected between the drive blocks of the second electric track (101). A mounting plate (103) is disposed on the top of the lifting plate (102). Top blocks (104) are vertically slidably connected to the left and right sides of the mounting plate (103). A piston rod (105) is connected to the bottom of each top block (104). Below the piston rod (105) A piston cylinder (106) is fixedly connected to the lifting plate (102). The piston rod (105) passes through the piston cylinder (106) below it and is connected to the piston inside the piston cylinder (106). The mounting plate (103) is slidably connected to the left and right sides of the mounting plate (103). An air bag (108) is connected between the opposite surfaces of the moving plates (107). Sandpaper (109) is inserted between the outer surfaces of the moving plates (107). A connecting pipe (1010) is provided between the air bag (108) and the bottom of the piston cylinder (106).

9. The laser cutting equipment for automotive seat frames as described in claim 8, characterized in that: A retractable enclosure (11) is provided between the opposite surfaces of the fixed mounting frame (4) and the movable mounting frame (5). The enclosure (11) has outward protruding openings at both the upper and lower parts. The upper opening of the enclosure (11) is connected to the laser cutting head (92), and the lower opening of the enclosure (11) is connected to the lifting plate (102). The side wall of the enclosure (11) is also connected to and communicates with a connecting pipe (12).

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