Steel backing laser cutting device with fixed clamping structure and method

Abstract

The invention discloses a steel backing laser cutting device with a fixed clamping structure and a method, and relates to the technical field of laser cutting. The steel backing laser cutting device with the fixed clamping structure comprises an I-shaped air cavity, the I-shaped air cavity is located under a laser cutting station, a falling opening is located under a lifting cleaning station, the rotating end of a stepping motor is connected with a plurality of box bodies distributed at equal intervals in the circumferential direction, and the inner walls of the lower portions of the box bodies are slidably connected with arch plates; the four corners of the box body are connected with pneumatic fixing pieces which are used for fixing the machining pieces in the box body. According to the steel backing laser cutting device and method with the fixed clamping structure, the box body is switched among the laser cutting station, the lifting cleaning station and the taking and replacing station, clamping or loosening of a machining piece is controlled through communication of an air pipe and an air conveying hole, the position of an arch plate in a cavity is changed through lifting, and residual impurities can be conveniently collected along a directional air channel.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting, and in particular to a steel back laser cutting device and method with a fixed clamping structure. Background Art

[0002] The steel back laser cutting device uses the laser cutting body to generate a high-power density laser beam, which is irradiated onto the surface of the steel back, so that the steel back material is quickly heated to the vaporization temperature and evaporated to form holes. In order to maintain the stability of the steel back during transportation and cutting, the steel back needs to be fixed and clamped.

[0003] With reference to Chinese patent publication number: CN118492694A, a laser cutting fixed table comprises a fixed table, a bottom plate is provided at the bottom of the fixed table, a fixing mechanism is provided on the surface of the fixed table, the fixing mechanism comprises a flipping assembly, a flexible clamping assembly and a bottom adjustment assembly, the flipping assembly is arranged on the top of the fixed table, and the flexible clamping assembly is arranged on the top of the flipping assembly surface. When processing the workpiece, it is necessary to process the other side of the workpiece, and the pneumatic telescopic rod and the slider and telescopic rod connecting seat connected thereto are pushed on the fixed plate by controlling the small cylinder to make the rack at the bottom drive the gear to rotate, so that the rotating shaft 1 and the outer pulley 1 rotate, and the transmission belt drives the pulley 2 and the rotating shaft 2 to rotate, thereby realizing the flipping of the clamped workpiece. The component has good controllability and stable overall operation, and can quickly realize the flipping of the clamped workpiece.

[0004] However, after the steel back is laser cut, it is necessary to replace the steel back before the new steel back can be laser cut, which prevents continuous production and reduces work efficiency. During the laser cutting process, a large amount of metal debris will be generated. These debris may adhere to the positioning surface, clamping mechanism or gap of the fixture. After the debris mixes with the coolant, it is easy to form corrosive substances. Long-term adhesion will cause the metal parts of the fixture to rust and shorten the service life. The debris may also contaminate the surface of the workpiece to be processed subsequently, affecting the product quality and requiring regular cleaning. However, in this process, the debris has already caused damage to the product and tools. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a steel back laser cutting device and method with a fixed clamping structure. The box body is used to switch between the laser cutting station, the lifting and cleaning station, and the replacement station. The clamping or release of the processing sheet is controlled by the connection between the air pipe and the air supply hole. The position of the arch plate in the cavity is changed by lifting and lowering, which facilitates the collection of residual impurities along the directional air duct.

[0006] Technical solution: To achieve the above objectives, the present invention is implemented through the following technical solutions: A steel back laser cutting device with a fixed clamping structure, comprising: a laser cutting station, a lifting and cleaning station, and a changing station on a machine tool, wherein the laser cutting station is arranged directly below the laser cutting head, an I-shaped air cavity is opened inside the machine tool, the I-shaped air cavity is located directly below the laser cutting station, a drop opening is opened on the top of the machine tool, and the drop opening is located directly below the lifting and cleaning station, the machine tool is connected to a stepper motor, and the rotating end of the stepper motor is connected to a plurality of box bodies equidistantly distributed in the circumferential direction, each of the upper inner walls of the box body is connected to guide rails on both sides, the inner wall of the lower part of the box body is slidably connected to an arch plate, both ends of the arch plate are connected to end plates, the top of the end plate is connected to a lifting block, and the four corners of the box body are connected to pneumatic fixings, and the pneumatic fixings are used to fix the processing piece in the box body.

[0007] Preferably, the arch plate is an arc-shaped plate. When the arch plate is located at the laser cutting station, the raised middle part of the arch plate is located below the processing piece. The length of the arch plate is the same as the length of the drop port. A dirt-containing cavity is provided inside the machine tool. The length of the dirt-containing cavity is greater than the length of the arch plate. A push rod is connected to the middle of the lower surface of the arch plate.

[0008] Preferably, the I-shaped air cavity consists of a ventilation duct and two uniform air ducts, the two ends of the ventilation duct are respectively connected to the two uniform air ducts, the ventilation duct is a horizontal air duct, and the uniform air duct is a vertical air duct. A first air inlet, a second air inlet, and an air outlet are provided on one side of the machine tool. One end of the first air inlet is connected to the ventilation duct, and the second air inlet and the air outlet are both connected to the dirt holding chamber. The first air inlet is connected to the fan through a first pipe, and the fan is connected to the second air inlet through a second pipe. A storage box is connected to the side of the machine tool, and the interior of the storage box is connected to the air outlet.

[0009] Preferably, the guide rail is slidably connected to the end block, the end block is connected to one side of the processing piece, the height of the lifting block is the same as the height of the drop port, and the bottom of the support rod and the bottom of the end plate are located in the same plane.

[0010] Preferably, the pneumatic fixing part includes: a cylinder, the cylinder is connected to the inner wall of the machine tool, one side of the cylinder is connected to a sealing plug through an air pipe, the inner wall of the cylinder is connected to a pneumatic bowl plate through a spring, the side of the pneumatic bowl plate away from the air pipe is connected to a shift rod, one end of the shift rod is connected to a pressure plate, and the side of the pressure plate away from the cylinder is adapted to the arc surface of the connection with the processing piece.

[0011] Preferably, a sealing groove is provided at the bottom of the end plate, a channel is provided through the top of the sealing groove, the bottom end of the air pipe extends into the channel and is fixedly connected to the inner wall of the channel, and a sealing plug is connected to the bottom end of the air pipe, which is connected to the sealing groove.

[0012] Preferably, air supply holes are provided through the tops of both ends of the air duct. When the box body is rotated from the changing station to the laser cutting station, the air supply holes are connected to the bottom of the air pipe. When the box body is rotated from the laser cutting station to the lifting and cleaning station, the gas in the cylinder flows out from the pipeline, and the pressure plate no longer abuts the processing piece. The bottom of the abutment rod is connected to the hydraulic cylinder through the piston rod, and the arch plate is separated from the processing workpiece by the movement of the telescopic end of the hydraulic cylinder.

[0013] Preferably, a friction groove is provided on a side of the pressing plate close to the processing sheet, and the friction groove is at least any one of a transverse strip groove, a vertical strip groove, and a wave groove.

[0014] Preferably, a placement groove is provided at the top of the guide rail, the placement groove is used to support the end block, a sliding groove is provided at the bottom of the guide rail, the sliding groove is connected to the placement groove, the lifting block is slidably connected to the sliding groove, and the projected area of ​​the top of the sliding groove is smaller than the projected area of ​​the top of the placement groove.

[0015] A steel back laser cutting method with a fixed clamping structure is applied to a steel back laser cutting device with a fixed clamping structure, and is characterized in that: through the rotation action, the box body is converted between the laser cutting station, the lifting and cleaning station, and the replacement station. When the box body is located at the laser cutting station, the air pipe is connected to the air supply hole, and the processing sheet is fixed. When the box body is located at the lifting and cleaning station, the gas in the cylinder is lost, and the processing sheet and the pressure plate are no longer in contact. The arch plate is driven by the piston rod to move vertically downward to the dirt holding chamber, and the falling of the residual debris on the arch plate is accelerated by the curved surface of the arch plate and the blowing effect of the wind.

[0016] Beneficial Effects: This invention provides a steel back laser cutting device and method with a fixed clamping structure. Compared with existing technologies, it has the following advantages: 1. The box body can be switched between the laser cutting station, the lifting and cleaning station, and the replacement station. The connection between the air pipe and the air supply hole controls the clamping and release of the processing sheet. The position of the arch plate in the cavity is changed by lifting, facilitating the collection of residual impurities along the directional air duct, reducing the upward movement of debris.

[0017] 2. By using wind as the only power source, the pressure plate used can be controlled to abut or separate from the processing piece at the same time. The wind pressure in the cylinder is constant and has a certain elasticity. The combination of wind pressure and spring can provide flexible force and make the pressure plate "fit" the original shape of the workpiece, ensuring stable clamping without forcibly correcting the micro deformation of the material, thereby reducing the risk of damage.

[0018] 3. Wind power not only serves as the power to fix the processing piece and control the clamping or loosening of the processing piece, but also can form an air duct in the wind direction and serve as the power to clean the residual impurities in the fixed clamping device. One wind has multiple uses, the energy utilization is wide, and the utilization rate of wind energy is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present application and, together with the description, further serve to explain the principles of the present application and enable those skilled in the relevant art to make and use the present application.

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 for Figure 1 Schematic diagram of the structure after removing the laser cutting head and control cabinet.

[0023] Figure 3 It is a structural diagram of the stepper motor and the box body.

[0024] Figure 4 This is a diagram of the separation of the processing piece, the arch plate and the box body.

[0025] Figure 5 It is a structural diagram of the part where the processing piece is located and the arch plate.

[0026] Figure 6 This is a structural diagram of a corner of the arch plate.

[0027] Figure 7 It is a schematic diagram of the structure of the cylinder, cylinder, pressure plate, spring and pneumatic bowl plate.

[0028] Figure 8 This is a cross-sectional view of a local area on the upper surface of the machine tool.

[0029] Figure 9 It is a structural schematic diagram of the first air inlet, the second air inlet, and the arch plate.

[0030] Figure 10 Schematic diagram of the structure of the pressure plate and friction groove.

[0031] The accompanying drawings are marked as follows: 11, machine tool; 12, laser cutting head; 13, control cabinet; 14, processing piece; 15, end block; 21, stepping motor; 22, rotating plate; 23, box body; 24, guide rail; 25, arch plate; 26, lifting block; 27, push rod; 28, end plate; 29, sealing groove; 31, cylinder; 32, air pipe; 33, sealing plug; 34, spring; 35, pneumatic bowl plate; 36, shift rod; 37, pressure plate; 38, friction groove; 41, ventilation duct; 42, air duct; 43, drop port; 44, first air inlet; 45, second air inlet; 46, air outlet; 47, dirt holding chamber; 51, fan; 52, first pipeline; 53, second pipeline; 54, storage box; 61, hydraulic cylinder; 62, piston rod.

[0032] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] like Figure 1 - Figure 10 As shown, an embodiment of the present invention provides a steel back laser cutting device with a fixed clamping structure, including: a laser cutting station, a lifting and cleaning station, and a replacing station on a machine tool 11, the laser cutting station is arranged directly below the laser cutting head 12, an I-shaped air cavity is opened inside the machine tool 11, the I-shaped air cavity is located directly below the laser cutting station, a drop port 43 is opened on the top of the machine tool 11, and the drop port 43 is located directly below the lifting and cleaning station, the machine tool 11 is connected to a stepper motor 21, and the rotating end of the stepper motor 21 is connected to a plurality of box bodies 23 equidistantly distributed in the circumferential direction, each box body 23 is connected to guide rails 24 on both sides of the upper inner wall, and the inner wall of the lower part of the box body 23 is slidably connected to an arch plate 25, both ends of the arch plate 25 are connected to end plates 28, and the top of the end plate 28 is connected to a lifting block 26, and the four corners of the box body 23 are connected to pneumatic fixings, which are used to fix the processing piece 14 in the box body 23.

[0035] The arch plate 25 is an arc-shaped plate. When the arch plate 25 is located at the laser cutting station, the raised middle part of the arch plate 25 is located below the processing sheet 14. The length of the arch plate 25 is the same as the length of the drop port 43. A dirt containing cavity 47 is provided inside the machine tool 11. The length of the dirt containing cavity 47 is greater than the length of the arch plate 25. A push rod 27 is connected to the middle part of the lower surface of the arch plate 25.

[0036] The I-shaped air cavity is composed of a ventilation duct 41 and two uniform air ducts 42. The two ends of the ventilation duct 41 are respectively connected to the two uniform air ducts 42. The ventilation duct 41 is a horizontal air duct, and the uniform air duct 42 is a vertical air duct. A first air inlet 44, a second air inlet 45, and an air outlet 46 are provided on one side of the machine tool 11. One end of the first air inlet 44 is connected to the ventilation duct 41, and the second air inlet 45 and the air outlet 46 are both connected to the dirt holding chamber 47. The first air inlet 44 is connected to the fan 51 through a first pipe 52, and the fan 51 is connected to the second air inlet 45 through a second pipe 53. A storage box 54 is connected to the side of the machine tool 11, and the interior of the storage box 54 is connected to the air outlet 46.

[0037] The guide rail 24 is slidably connected to the end block 15, and the end block 15 is connected to one side of the processing piece 14. The height of the lifting block 26 is the same as the height of the drop opening 43, and the bottom of the support rod 27 and the bottom of the end plate 28 are located in the same plane.

[0038] The pneumatic fixing part includes: a cylinder 31, which is connected to the inner wall of the machine tool 11, and a sealing plug 33 is connected to one side of the cylinder 31 through an air pipe 32. The inner wall of the cylinder 31 is connected to a pneumatic bowl plate 35 through a spring 34. The side of the pneumatic bowl plate 35 away from the air pipe 32 is connected to a shift rod 36, and one end of the shift rod 36 is connected to a pressure plate 37. The side of the pressure plate 37 away from the cylinder 31 is adapted to the arc surface of the connection with the processing piece 14.

[0039] A sealing groove 29 is provided at the bottom of the end plate 28 , and a channel is provided through the top of the sealing groove 29 . The bottom end of the air pipe 32 extends into the channel and is fixedly connected to the inner wall of the channel. A sealing plug 33 is connected to the bottom end of the air pipe 32 , and the sealing plug 33 is connected to the sealing groove 29 .

[0040] Air supply holes are provided at the top of both ends of the air duct 42. When the box body 23 is rotated from the changing station to the laser cutting station, the air supply holes are connected to the bottom of the air pipe 32. When the box body 23 is rotated from the laser cutting station to the lifting and cleaning station, the gas in the cylinder 31 flows out from the pipeline, and the pressure plate 37 no longer abuts the processing piece 14. The bottom of the abutment rod 27 is connected to the hydraulic cylinder 61 through the piston rod 62, and the arch plate 25 is separated from the workpiece by moving the telescopic end of the hydraulic cylinder 61.

[0041] A friction groove 38 is provided on the side of the pressure plate 37 close to the processing piece 14. The friction groove 38 is at least any one of a horizontal strip groove, a vertical strip groove, and a wave groove. A placement groove is provided on the top of the guide rail 24. The placement groove is used to support the end block 15. A sliding groove is provided on the bottom of the guide rail 24. The sliding groove is connected to the placement groove. The lifting block 26 is slidably connected to the sliding groove. The projected area of ​​the top of the sliding groove is smaller than the projected area of ​​the top of the placement groove.

[0042] A steel back laser cutting method with a fixed clamping structure is applied to a steel back laser cutting device with a fixed clamping structure. Through rotation, the box body 23 is switched between the laser cutting station, the lifting and cleaning station, and the replacement station. When the box body 23 is located at the laser cutting station, the air pipe 32 is connected to the air supply hole, and the processing sheet 14 is fixed. When the box body 23 is located at the lifting and cleaning station, the gas in the cylinder 31 is lost, and the processing sheet 14 and the pressure plate 37 are no longer in contact. The arch plate 25 is driven by the piston rod 62 to move vertically downward to the dirt holding chamber 47. The arc surface of the arch plate 25 and the blowing effect of the wind accelerate the falling of the residual debris on the arch plate 25.

[0043] When in use, the processing piece 14 to be cut is placed in the box body 23 of the exchange station, the end block 15 is placed in the placement groove at the top of the guide rail 24, and the stepper motor 21 is started. The rotating end of the stepper motor 21 carries several box bodies 23 to switch between the laser cutting station, the lifting and cleaning station, and the exchange station.

[0044] After the box body 23 on the exchange station is rotated to the laser cutting station, the air pipe 32 is located directly above the air supply hole, and the sealing plug 33 is used to seal the peripheral area of ​​the connection between the air pipe 32 and the air supply hole. The fan 51 is started, and the air enters the first air inlet, the ventilation duct 41, the plurality of air ducts 42, the air supply hole, the air pipe 32, and the cylinder 31 in sequence through the first pipe 52. The wind pressure in all cylinders 31 increases, and the pneumatic bowl plate 35 moves toward the processing sheet 14 under the action of the wind pressure. The spring 34 stretches, and the pneumatic bowl plate 35 pushes the shift rod 36 and the pressure plate 37 in sequence. The pressure plate 37 contacts the curved surface of the processing sheet 14. The pressure plate 37 is provided with a plurality of friction grooves to increase the friction between the pressure plate 37 and the processing sheet 14, reducing the risk of relative sliding between the two. With wind as the only power source, the pressure plate 37 used can be controlled to contact or separate with the processing sheet 14 at the same time. The wind pressure in the cylinder 31 is constant, and it has a certain degree of elasticity. When laser cutting metal, the high-energy laser beam instantly melts or vaporizes the material, which will produce airflow shock and thermal shock vibration; and during cutting, the local temperature of the metal sheet rises sharply, up to thousands of degrees Celsius, which will cause thermal expansion. After the cutting is completed, it cools and contracts again. The combination of wind pressure and spring 34 can provide flexible force and make the pressure plate 37 "fit" the original shape of the workpiece, ensuring firm clamping without forcibly correcting the microscopic deformation of the material, thereby reducing the risk of damage.

[0045] After the box body 23 of the laser cutting station rotates to the lifting and cleaning station, the air pipe 32 is no longer connected to the air supply hole, and the wind in the cylinder 31 escapes through the air pipe 32. The wind pressure in the cylinder 31 decreases, the spring 34 contracts, and the pneumatic bowl plate 35 carries the moving rod 36 and the pressure plate 37 away from the processing sheet 14, and the pressure plate 37 no longer abuts the processing sheet 14.

[0046] A hydraulic cylinder 61 is provided directly below the lifting cleaning station. Initially, the top of the piston rod 62 on the telescopic end of the liquid oxygen cylinder contacts the push rod 27. The telescopic end of the hydraulic cylinder 61 moves the piston rod 62 vertically downward, and the push rod 27 loses its support. The push rod 27 and the arch plate 25 move downward under the action of gravity, and the piston rod 62 moves downward slowly, which can also prevent the arch plate 25 from falling rapidly and reduce the impact force of the arch plate 25 falling. The length of the arch plate 25 is the same as the length of the drop port 43. The arch plate 25 is a curved arc plate. Some metal debris slides down along the arc surface to the bottom end of the arch plate 25. At this time, the arch plate 25 is equivalent to a partition, isolating the drop port 43 from the dirt chamber 47. In the process of the arch plate 25 moving in the drop port 43, the wind in the dirt chamber 47 is prevented from lifting light debris. The arch plate 25 continues to move downward along with the piston rod 62. After the arch plate 25 enters the dirt receiving chamber 47 from the drop port 43, impurities on the arch plate 25 and the inner wall of the drop port 43 fall into the dirt receiving chamber 47. Air is blown in from the second air inlet 45 and out from the air outlet 46, forming an air duct with a fixed wind direction. The falling impurities and most of the impurities on the arch plate 25 sink to the bottom of the dirt receiving chamber 47 or are blown into the impurity removal box. Some air will blow through the drop port 43, but the drop port 43 has a certain height. The gravity of the debris itself will act as an upward resistance, reducing the amount of debris blown out of the drop port 43. After each laser cutting, the impurities remaining on the fixed clamping device can be cleaned in a timely manner.

[0047] The wind power is not only used as the power to fix the processing piece 14, but also as the power to clean the residual impurities of the fixed clamping device. The wind can be used for multiple purposes, the energy utilization area is wide, and the utilization rate of wind energy is improved.

[0048] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. While specific details are described in detail in the preferred embodiments of the present invention to provide a thorough understanding of the present invention, those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A steel back laser cutting device with a fixed clamping structure, characterized in that: include: The laser cutting station, lifting and cleaning station, and changing station on the machine tool (11) are provided. The laser cutting station is arranged directly below the laser cutting head (12). An I-shaped air cavity is provided inside the machine tool (11). The I-shaped air cavity is located directly below the laser cutting station. A drop opening (43) is provided on the top of the machine tool (11). The drop opening (43) is located directly below the lifting and cleaning station. The machine tool (11) is connected to a stepping motor (21). The rotating end of the stepping motor (21) A plurality of box bodies (23) are connected and distributed equidistantly in the circumferential direction, and guide rails (24) are connected to both sides of the upper inner wall of each box body (23), and an arch plate (25) is slidably connected to the inner wall of the lower part of the box body (23), and both ends of the arch plate (25) are connected to end plates (28), and the top of the end plate (28) is connected to a lifting block (26), and the four corners of the box body (23) are connected to pneumatic fixings, and the pneumatic fixings are used to fix the processing sheet (14) in the box body (23).

2. The steel back laser cutting device with a fixed clamping structure according to claim 1, characterized in that: The arch plate (25) is an arc-shaped plate. When the arch plate (25) is located at the laser cutting station, the middle portion of the arch plate (25) is raised and located below the processing plate (14). The length of the arch plate (25) is the same as the length of the drop opening (43). A dirt containing cavity (47) is provided inside the machine tool (11). The length of the dirt containing cavity (47) is greater than the length of the arch plate (25). A support rod (27) is connected to the middle portion of the lower surface of the arch plate (25).

3. The steel back laser cutting device with a fixed clamping structure according to claim 2, characterized in that: The I-shaped air cavity is composed of a ventilation duct (41) and two uniform air ducts (42), the two ends of the ventilation duct (41) are respectively connected to the two uniform air ducts (42), the ventilation duct (41) is a horizontal air duct, and the uniform air duct (42) is a vertical air duct. A first air inlet (44), a second air inlet (45), and an air outlet (46) are provided on one side of the machine tool (11), one end of the first air inlet (44) is connected to the ventilation duct (41), the second air inlet (45) and the air outlet (46) are both connected to the dirt chamber (47), the first air inlet (44) is connected to the fan (51) through a first pipe (52), and the fan (51) is connected to the second air inlet (45) through a second pipe (53). A sundry box (54) is connected to the side of the machine tool (11), and the interior of the sundry box (54) is connected to the air outlet (46).

4. The steel back laser cutting device with a fixed clamping structure according to claim 2, characterized in that: The guide rail (24) is slidably connected to the end block (15), the end block (15) is connected to one side of the processing piece (14), the height of the lifting block (26) is the same as the height of the drop opening (43), and the bottom of the support rod (27) and the bottom of the end plate (28) are located in the same plane.

5. The steel back laser cutting device with a fixed clamping structure according to claim 3, characterized in that: The pneumatic fixing member comprises: a cylinder (31), the cylinder (31) is connected to the inner wall of the machine tool (11), one side of the cylinder (31) is connected to a sealing plug (33) through an air pipe (32), the inner wall of the cylinder (31) is connected to a pneumatic bowl plate (35) through a spring (34), the side of the pneumatic bowl plate (35) away from the air pipe (32) is connected to a shift rod (36), one end of the shift rod (36) is connected to a pressure plate (37), and the side of the pressure plate (37) away from the cylinder (31) is adapted to the arc surface of the connection between the processing plate (14).

6. The steel back laser cutting device with a fixed clamping structure according to claim 5, characterized in that: A sealing groove (29) is provided at the bottom of the end plate (28), a hole is provided through the top of the sealing groove (29), the bottom end of the air pipe (32) extends into the hole and is fixedly connected to the inner wall of the hole, the bottom end of the air pipe (32) is connected to a sealing plug (33), and the sealing plug (3 is a steel back laser cutting device with a fixed clamping structure 3) is connected to the sealing groove (29).

7. The steel back laser cutting device with a fixed clamping structure according to claim 5, characterized in that: Air supply holes are provided at the tops of both ends of the air duct (42). When the box body (23) is rotated from the exchange station to the laser cutting station, the air supply holes are connected to the bottom of the air pipe (32). When the box body (23) is rotated from the laser cutting station to the lifting and cleaning station, the gas in the cylinder (31) flows out from the pipeline, and the pressure plate (37) no longer abuts the processing sheet (14). The bottom of the abutment rod (27) is connected to the hydraulic cylinder (61) through the piston rod (62). The arch plate (25) is separated from the workpiece by moving the telescopic end of the hydraulic cylinder (61).

8. The steel back laser cutting device with a fixed clamping structure according to claim 5, characterized in that: A friction groove (38) is provided on one side of the pressing plate (37) close to the processing sheet (14), and the friction groove (38) is at least any one of a horizontal strip groove, a vertical strip groove, and a wave groove.

9. The steel back laser cutting device with a fixed clamping structure according to claim 5, characterized in that: A placement groove is provided at the top of the guide rail (24), and the placement groove is used to support the end block (15). A sliding groove is provided at the bottom of the guide rail (24), and the sliding groove is connected to the placement groove. The lifting block (26) is slidably connected to the sliding groove, and the projected area of ​​the top of the sliding groove is smaller than the projected area of ​​the top of the placement groove.

10. A steel back laser cutting method with a fixed clamping structure, applied to the steel back laser cutting device with a fixed clamping structure according to any one of claims 1 to 9, characterized in that: By rotating, the box body (23) is switched between the laser cutting station, the lifting and cleaning station, and the replacement station. When the box body (23) is located at the laser cutting station, the air pipe (32) is connected to the air delivery hole, and the processing sheet (14) is fixed. When the box body (23) is located at the lifting and cleaning station, the gas in the cylinder (31) is lost, and the processing sheet (14) and the pressure plate (37) are no longer in contact. The arch plate (25) is driven by the piston rod (62) to move vertically downward to the dirt holding chamber (47). The arc surface of the arch plate (25) and the wind blowing effect accelerate the falling of the residual debris on the arch plate (25).

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