Automobile sheet metal part cutting device and using method thereof

Abstract

The invention discloses an automobile sheet metal part cutting device and a using method thereof, and relates to the technical field of automobile sheet metal machining, the automobile sheet metal part cutting device comprises a rack, and one side of the rack is fixedly connected with a supporting frame. According to the laser cutting device, the first bevel gear is meshed with the second bevel gear, the second horizontal gear is meshed with the first horizontal gear, the first bevel gear drives the second bevel gear and the laser cutting head to rotate synchronously when rotating, and the inclination angle of the laser cutting head is changed; an auxiliary part and a laser cutting head can be driven to rotate around the circle center of a second horizontal gear, the cutting position of a sheet metal part is changed, circular cutting of the sheet metal part is achieved, the precision during overall cutting is improved, frequent movement and replacement of the sheet metal position are not needed, operation is easy, cutting efficiency is high, waste gas is doubly filtered through a first filter screen and a second filter screen, and the cutting efficiency is improved. The waste gas can be purified through the spraying pipe and the purifying plate, so that the influence of direct exhaust of the waste gas on the air quality is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of automobile sheet metal processing, in particular to an automobile sheet metal cutting device and a use method thereof. Background Art

[0002] Sheet metal is a comprehensive cold processing technology for thin metal plates, including shearing, punching / cutting / combining, folding, welding, riveting, splicing, forming (such as automobile bodies), etc. Its most notable feature is that the thickness of the same part is consistent. The products processed by sheet metal technology are called sheet metal parts, which are widely used in the processing of automobile bodies.

[0003] For example, Chinese patent CN220739606U discloses an automobile sheet metal cutting device, including a cutting platform, an opening is formed on the cutting platform, a carrying box is fixedly mounted on the lower wall of the cutting platform, a cutting machine is fixedly mounted in the carrying box, the cutting end of the cutting machine passes through the opening, baffles are respectively arranged on the cutting platform and on both sides of the opening, an adjusting component is arranged between the baffle and the cutting platform, a horizontal plate is fixedly mounted on the upper wall of the baffle, and a pressing component is arranged on the horizontal plate.

[0004] In the above patent, although the problem of prying the sheet metal during cutting is solved by adjusting the components and pressing down the components, the position and angle of the cutting machine are relatively fixed, and only simple cutting of the sheet metal can be performed. When the sheet metal needs to be cut into a circle or other shape, it is necessary to frequently move the sheet metal, change the position of the sheet metal, and then fix the sheet metal again. The overall operation is relatively cumbersome and the cutting efficiency is low. Summary of the invention

[0005] The purpose of the present invention is to provide an automobile sheet metal cutting device and a method of using the same, so as to solve the problem that the position and angle of the cutting machine proposed in the above-mentioned background technology are relatively fixed, and only simple cutting can be performed on the sheet metal. When the sheet metal needs to be cut into a circle or other shape, the sheet metal needs to be frequently moved, the position of the sheet metal needs to be changed, and then the sheet metal needs to be fixed again. The overall operation is relatively cumbersome and the cutting efficiency is low.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automobile sheet metal cutting device, comprising a frame, one side of the frame is fixedly connected to a support frame, the top of the support frame is fixedly connected to a hydraulic push rod, one end of the hydraulic push rod is fixedly connected to a guide frame, one side of the guide frame is slidably connected to the support frame, the top of the guide frame is fixedly connected to a hydraulic cylinder, the bottom of the hydraulic cylinder is fixedly connected to a guide member, and one side of the guide member is provided with a cutting assembly; The cutting assembly includes a fixing part, a bevel gear 1 and a flat gear 1, the fixing part is fixedly connected to a gear ring at the bottom, the outer ring surface of the gear ring is fixedly connected to the guide part, the inner wall of the gear ring is meshed with the top of the flat gear 1, the bottom side of the flat gear 1 is meshed with a flat gear 2, the top of the flat gear 2 is rotatably connected to the fixing part, the bottom of the flat gear 1 is rotatably connected to an auxiliary part, the bottom of the auxiliary part is rotatably connected to a laser cutting head, one side of the laser cutting head is fixedly connected to a bevel gear 2, one side of the bevel gear 2 is meshed with the bevel gear 1, one side of the bevel gear 1 is fixedly connected to a motor 2, and one side of the motor 2 is fixedly connected to the auxiliary part.

[0007] Preferably, the bottom of the flat gear 2 is fixedly connected to the output shaft of the motor 1, and the top of the motor 1 is fixedly connected to a fixing member.

[0008] Preferably, a purification mechanism is provided on one side of the guide frame, and the purification mechanism includes a purification box, an adsorption plate and a spray pipe. A protective cover is fixedly connected to the bottom of the purification box, and one side of the protective cover is snap-connected to the support frame.

[0009] Preferably, one side of the purification box is fixedly connected to an adsorption tube, an axial flow fan is installed inside the adsorption tube, one end of the adsorption tube is fixedly connected to an adsorption plate, one side of the adsorption plate is fixedly connected to the inner wall of the protective cover, and an adsorption port is opened on one side of the adsorption plate.

[0010] Preferably, filter screen one and filter screen two are fixedly connected to one side of the inner wall of the purification box, the spray pipe is located between filter screen one and filter screen two, the top of the spray pipe is fixedly connected to the top of the inner cavity of the purification box, and a collecting box is provided at the bottom of the spray pipe, and the bottom of the collecting box is fixedly connected to the inner wall of the purification box.

[0011] Preferably, a lamp tube is snap-connected to one side of the second filter screen, a purification plate is provided on one side of the lamp tube, and one side of the purification plate is fixedly connected to the inner wall of the purification box.

[0012] Preferably, a lead screw displacement component 1 is installed on one side of the frame, the lead screw of the lead screw displacement component 1 is connected to the lead screw displacement component 2 via a thread, and one end of the lead screw displacement component 2 passes through the side wall of the protective cover.

[0013] Preferably, the screw of the screw shifting assembly 2 is connected to the placement plate via a thread, the placement plate is slidably connected to the protective cover, and one side is fixedly connected to the limiting member 1.

[0014] Preferably, one side of the placement plate is rotatably connected to a threaded rod, the threaded rod is threadedly connected to a second limiting member, and one side of the second limiting member is slidably connected to the placement plate.

[0015] A method for using a vehicle sheet metal cutting device comprises the following steps: S1. Place the sheet metal part to be cut on the placement plate, clamp it with the limiter 1 and the limiter 2, then adjust the position of the screw shift component 2 by the screw shift component 1, and use the screw on the screw shift component 2 to send the placement plate into the protective cover; S2. Use the hydraulic push rod and the hydraulic cylinder to adjust the use height of the cutting assembly. After the adjustment, use the motor 1 to drive the flat gear 2 to rotate. The flat gear 2 is meshed with the flat gear 1, driving the flat gear to rotate while revolving around the center of the flat gear 2. The laser cutting head revolves synchronously with the flat gear 1 to perform circular cutting on the sheet metal part. S3. During cutting, the axial flow fan inside the adsorption tube is used to accelerate the gas flow inside the protective cover, so that the exhaust gas enters the adsorption tube through the adsorption plate, and then is discharged into the purification box, filtered through the filter screen 1, sprayed through the spray pipe, and then filtered through the filter screen 2 and purified by the lamp tube before being discharged from the exhaust port on one side of the purification box; S4. Open the drain pipe on one side of the collection box to quickly discharge the waste liquid collected inside the collection box to reduce the accumulation of waste liquid inside the collection box.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, bevel gear one is meshed with bevel gear two, and spur gear two is meshed with spur gear one. When bevel gear one rotates, bevel gear two and the laser cutting head are driven to rotate synchronously, thereby changing the inclination angle of the laser cutting head. When spur gear two rotates, the spur gear rotates on itself and revolves around the center of spur gear two, thereby driving the auxiliary parts and the laser cutting head to rotate about the center of the circle of spur gear two, thereby changing the cutting position of the sheet metal, realizing circular cutting of the sheet metal, and improving the overall cutting accuracy. There is no need to frequently move and change the position of the sheet metal, and the operation is relatively simple with high cutting efficiency.

[0017] In the present invention, one side of the adsorption plate is fixedly connected to the adsorption tube, and one end of the adsorption tube is fixedly connected to the purification box. The exhaust gas can enter the adsorption tube through the adsorption plate, and is guided into the purification box through the adsorption tube. The exhaust gas is doubly filtered by filter screen one and filter screen two, and the exhaust gas can be purified by the spray pipe and the purification plate, thereby avoiding the impact of direct exhaust gas discharge on air quality.

[0018] 3. In the present invention, one side of the limit member 2 is fixedly connected to the placement plate, and one side of the limit member 2 is slidably connected to the placement plate. By rotating the threaded rod, the limit member 2 moves toward the side close to the placement plate, and the sheet metal is only fixed on the top of the placement plate. The screw structure of the screw shift assembly 1 and the screw shift assembly 2 can drive the position adjustment of the sheet metal, so that the adjusted sheet metal is moved to the bottom of the cutting assembly, realizing automatic loading of the sheet metal, thereby improving the processing efficiency when cutting the sheet metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic diagram of the overall structure of an automobile sheet metal cutting device of the present invention; Figure 2 This is a schematic diagram of the installation of an adsorption plate structure of an automobile sheet metal cutting device of the present invention; Figure 3 This is a schematic diagram of the installation of a guide frame structure of an automobile sheet metal cutting device of the present invention; Figure 4 This is a schematic diagram of the installation of a hydraulic cylinder structure of an automobile sheet metal cutting device of the present invention; Figure 5 This is a schematic diagram of the installation of a spray pipe structure of an automobile sheet metal cutting device of the present invention; Figure 6 This is a schematic diagram of the structural installation of a motor 1 and a motor 2 of an automobile sheet metal cutting device of the present invention; Figure 7 This is a schematic diagram of the structural installation of a spur gear 1 and a spur gear 2 of an automobile sheet metal cutting device of the present invention; Figure 8 The present invention is a schematic diagram of the engagement between the top of a flat gear and a gear ring structure of an automobile sheet metal cutting device.

[0020] In the figure: 1. Purification mechanism; 11. Purification box; 12. Adsorption plate; 13. Adsorption tube; 14. Filter one; 15. Spray pipe; 16. Filter two; 17. Purification plate; 18. Lamp tube; 19. Collection box; 2. Protective cover; 3. Screw displacement assembly one; 4. Screw displacement assembly two; 41. Placement plate; 42. Limiter one; 43. Limiter two; 5. Rack; 6. Support frame; 7. Hydraulic push rod; 71. Guide frame; 72. Hydraulic cylinder; 73. Cutting assembly; 731. Fixing part; 732. Motor one; 733. Motor two; 734. Bevel gear one; 735. Bevel gear two; 736. Laser cutting head; 737. Flat gear one; 738. Gear ring; 739. Flat gear two; 74. Guide piece; 75. Auxiliary piece. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1: Reference Figure 1-Figure 8As shown: an automobile sheet metal cutting device, including a frame 5, a support frame 6 is fixedly connected to one side of the frame 5, a hydraulic push rod 7 is fixedly connected to the top of the support frame 6, one end of the hydraulic push rod 7 is fixedly connected to a guide frame 71, one side of the guide frame 71 is slidably connected to the support frame 6, a hydraulic cylinder 72 is fixedly connected to the top of the guide frame 71, a guide member 74 is fixedly connected to the bottom of the hydraulic cylinder 72, and a cutting assembly 73 is arranged on one side of the guide member 74; the cutting assembly 73 includes a fixing member 731, a bevel gear 734 and a flat gear 737, a gear ring 738 is fixedly connected to the bottom of the fixing member 731, the outer ring surface of the gear ring 738 is fixedly connected to the guide member 74, and the inner wall of the gear ring 738 is meshed with a flat The top of gear 1 737 and one side of the bottom of flat gear 1 737 are meshed with flat gear 2 739, the top of flat gear 2 739 is rotatably connected to the fixing part 731, the bottom of flat gear 1 737 is rotatably connected to the auxiliary part 75, the bottom of the auxiliary part 75 is rotatably connected to the laser cutting head 736, one side of the laser cutting head 736 is fixedly connected to bevel gear 2 735, one side of bevel gear 2 735 is meshed with bevel gear 1 734, one side of bevel gear 1 734 is fixedly connected to motor 2 733, one side of motor 2 733 is fixedly connected to the auxiliary part 75, the bottom of flat gear 2 739 is fixedly connected to the output shaft of motor 1 732, and the top of motor 1 732 is fixedly connected to the fixing part 731.

[0023] In this embodiment, the frame 5 can be used to support and reinforce the bottom of the support frame 6, the hydraulic push rod 7 can be used to drive the guide frame 71 to move, thereby changing the use position of the guide frame 71, and the hydraulic cylinder 72 can be used to drive the guide member 74 to rise and fall, thereby changing the use height of the cutting assembly 73 and the guide member 74. The fixing member 731 can be used to support and reinforce the top of the gear ring 738, and the rotation range of the flat gear 1 737 can also be limited to prevent the flat gear 1 737 from falling, which can ensure the stable use of the flat gear 1 737. The motor 1 732 can provide power for the rotation of the flat gear 2 739, and the up and down movement of the flat gear 1 737 The two sides are respectively meshed with the gear ring 738 and the flat gear 2 739, which can realize the rotation and revolution of the flat gear 1 737, and then realize the position adjustment of the laser cutting head 736. The auxiliary part 75 can connect the flat gear 1 737 and the laser cutting head 736, so as to reduce the interference of the flat gear 1 737 with the use of the laser cutting head 736 when the flat gear 1 737 rotates. The auxiliary part 75 can also support and reinforce one side of the motor 2 733, and the motor 2 733 can provide power for the rotation of the bevel gear 1 734. The bevel gear 1 734 can drive the bevel gear 2 735 to rotate, thereby changing the inclination angle of the laser cutting head 736 when it is in use.

[0024] Embodiment 2: According to Figure 1-Figure 6As shown, a purification mechanism 1 is arranged on one side of the guide frame 71, and the purification mechanism 1 includes a purification box 11, an adsorption plate 12 and a spray pipe 15. A protective cover 2 is fixedly connected to the bottom of the purification box 11, and one side of the protective cover 2 is snap-connected to the support frame 6. An adsorption tube 13 is fixedly connected to one side of the purification box 11, and an axial flow fan is installed inside the adsorption tube 13. One end of the adsorption tube 13 is fixedly connected to the adsorption plate 12, and one side of the adsorption plate 12 is fixedly connected to the inner wall of the protective cover 2, and one side of the adsorption plate 12 is provided with an adsorption fan. A filter screen 14 and a filter screen 2 16 are fixedly connected to one side of the inner wall of the purification box 11, a spray pipe 15 is located between the filter screen 14 and the filter screen 2 16, the top of the spray pipe 15 is fixedly connected to the top of the inner cavity of the purification box 11, and a collecting box 19 is provided at the bottom of the spray pipe 15, and the bottom of the collecting box 19 is fixedly connected to the inner wall of the purification box 11, a lamp tube 18 is snap-connected to one side of the filter screen 2 16, a purification plate 17 is provided on one side of the lamp tube 18, and one side of the purification plate 17 is fixedly connected to the inner wall of the purification box 11.

[0025] A screw shift assembly 3 is installed on one side of the frame 5, and the screw of the screw shift assembly 3 is connected to the screw shift assembly 2 4 through a thread, and one end of the screw shift assembly 2 4 passes through the side wall of the protective cover 2, and the screw of the screw shift assembly 2 4 is connected to the placement plate 41 through a thread, the placement plate 41 is slidingly connected to the protective cover 2, and one side is fixedly connected to a limiting member 1 42, and one side of the placement plate 41 is rotatably connected to a threaded rod, and the threaded rod is connected to a limiting member 2 43 through a thread, and one side of the limiting member 2 43 is slidingly connected to the placement plate 41.

[0026] In this embodiment, the adsorption tube 13 can be used to achieve communication between the adsorption plate 12 and the purification box 11. The axial flow fan installed inside the adsorption tube 13 can guide the movement of the exhaust gas, so that the exhaust gas can smoothly enter the purification box 11. The filter screen 14 and the filter screen 2 16 with different apertures can achieve double filtration of the exhaust gas, thereby improving the treatment effect of the exhaust gas. The spraying of the spray pipe 15 can achieve preliminary purification of the exhaust gas. The lamp tube 18 can assist the use of the purification plate 17. The purification plate 17 can be used to purify the exhaust gas again, thereby reducing the content of harmful substances in the exhaust gas, thereby reducing the interference with the surrounding environment when the gas is discharged. The collection box 19 can collect the waste liquid generated by the spraying, which is convenient for the subsequent centralized discharge of the waste liquid; At the same time, the position adjustment of the screw shift component 1 3 can be driven by the screw shift component 2 4, so that the placement plate 41 can smoothly enter the protective cover 2, and the screw on the screw shift component 2 4 can drive the placement plate 41 to move back and forth along the screw, thereby realizing automatic loading of sheet metal parts, and the limit member 1 42 can assist in the stable placement of the sheet metal parts on the top of the placement plate 41, and the position of the limit member 2 43 on both sides of the placement plate 41 can be adjusted by the threaded rod, thereby realizing the clamping and fixation of the sheet metal parts and reducing the displacement of the sheet metal parts during movement and cutting.

[0027] Embodiment 3: A method for using a vehicle sheet metal cutting device, comprising the following steps: Step 1: Place the sheet metal part to be cut on the placement plate 41, clamp it with the limiter 1 42 and the limiter 2 43, then adjust the position of the screw shift assembly 2 4 through the screw shift assembly 1 3, and use the screw on the screw shift assembly 2 4 to send the placement plate 41 into the protective cover 2; Step 2: Use the hydraulic push rod 7 and the hydraulic cylinder 72 to adjust the use height of the cutting assembly 73. After the adjustment, use the motor 1 732 to drive the flat gear 2 739 to rotate. The flat gear 2 739 is meshed with the flat gear 1 737, driving the flat gear 1 737 to rotate while revolving around the center of the flat gear 2 739. The laser cutting head 736 revolves synchronously with the flat gear 1 737 to perform circular cutting on the sheet metal part. Step 3: During cutting, the axial flow fan inside the adsorption tube 13 is used to accelerate the gas flow inside the protective cover 2, so that the exhaust gas enters the adsorption tube 13 through the adsorption plate 12, and then is discharged into the purification box 11, filtered by the filter screen 14, sprayed by the spray pipe 15, and then filtered by the filter screen 2 16 and purified by the lamp tube 18 before being discharged from the exhaust port on one side of the purification box 11; Step 4: Open the drain pipe on one side of the collection box 19 to quickly discharge the waste liquid collected in the collection box 19 to reduce the accumulation of waste liquid in the collection box 19.

[0028] The method of using and working principle of the device are as follows: first, place the sheet metal on the placement plate 41, engage the two sides with the limiter 42, then rotate the threaded rod to move the limiter 43 to the side close to the sheet metal, clamp and fix the sheet metal, then start the drive equipment on the lead screw shift assembly 1 3 and the lead screw shift assembly 2 4, adjust the coordinates of the placement plate 41 on the X-axis and Y-axis, move the placement plate 41 to the bottom of the cutting assembly 73, then use the hydraulic push rod 7 to drive the guide frame 71 to move along the support frame 6, calibrate the position of the cutting assembly 73, and after the calibration, use the hydraulic cylinder 72 to drive the guide member 74 to move downward to adjust the height between the cutting assembly 73 and the sheet metal; The motor 2 733 is used to drive the bevel gear 1 734 to rotate, and the bevel gear 1 734 is meshed with the bevel gear 2 735, driving the bevel gear 2 735 and the laser cutting head 736 to rotate, and changing the inclination angle of the laser cutting head 736. After the adjustment is completed, the motor 1 732 is used to drive the flat gear 2 739 to rotate, and the flat gear 2 739 is meshed with the flat gear 1 737, driving the flat gear 1 737 to rotate while revolving. Since the auxiliary part 75 is rotationally connected with the flat gear 1 737, the auxiliary part 75 does not rotate when the flat gear 1 737 rotates, and the top of the flat gear 1 737 is engaged in the arc groove on the fixing part 731, which can prevent the flat gear 1 737 from separating from the fixing part 731. During the rotation process, the laser cutting head 736 can complete the cutting of the sheet metal. The waste gas generated by cutting can enter the purification box 11 through the adsorption plate 12 and the adsorption tube 13. The filter 14 can filter the dust and debris inside the waste gas. The spray pipe 15 is externally connected to the hydrogen peroxide solution, which is sprayed through the nozzle at the bottom of the spray pipe 15 to spray the waste gas. The waste liquid generated by the spraying enters the collection box 19 for collection. The treated waste liquid can be filtered again through the filter 2 16. The lamp tube 18 can activate the purification plate 17 of the photomedia material, and the purification plate 17 is used to purify the waste gas again. The purified gas can be discharged through the exhaust port on one side of the purification box 11.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automobile sheet metal cutting device, comprising a frame (5), one side of the frame (5) being fixedly connected to a support frame (6), characterized in that: The top of the support frame (6) is fixedly connected to a hydraulic push rod (7), one end of the hydraulic push rod (7) is fixedly connected to a guide frame (71), one side of the guide frame (71) is slidably connected to the support frame (6), the top of the guide frame (71) is fixedly connected to a hydraulic cylinder (72), the bottom of the hydraulic cylinder (72) is fixedly connected to a guide member (74), and one side of the guide member (74) is provided with a cutting assembly (73); The cutting assembly (73) comprises a fixing member (731), a bevel gear 1 (734) and a flat gear 1 (737); a toothed ring (738) is fixedly connected to the bottom of the fixing member (731); an outer ring surface of the toothed ring (738) is fixedly connected to the guide member (74); a top of the flat gear 1 (737) is meshed with an inner wall of the toothed ring (738); a flat gear 2 (739) is meshed with one side of the bottom of the flat gear 1 (737); a top of the flat gear 2 (739) is meshed with the fixing member (731) ), the bottom of the flat gear 1 (737) is rotatably connected to an auxiliary part (75), the bottom of the auxiliary part (75) is rotatably connected to a laser cutting head (736), one side of the laser cutting head (736) is fixedly connected to a bevel gear 2 (735), one side of the bevel gear 2 (735) is meshed with a bevel gear 1 (734), one side of the bevel gear 1 (734) is fixedly connected to a motor 2 (733), and one side of the motor 2 (733) is fixedly connected to the auxiliary part (75).

2. The automobile sheet metal cutting device according to claim 1, characterized in that: The bottom of the flat gear 2 (739) is fixedly connected to the output shaft of the motor 1 (732), and the top of the motor 1 (732) is fixedly connected to the fixing member (731).

3. The automobile sheet metal cutting device according to claim 1, characterized in that: A purification mechanism (1) is provided on one side of the guide frame (71), the purification mechanism (1) comprising a purification box (11), an adsorption plate (12) and a spray pipe (15), a protective cover (2) is fixedly connected to the bottom of the purification box (11), and one side of the protective cover (2) is snap-connected to the support frame (6).

4. The automobile sheet metal cutting device according to claim 3, characterized in that: One side of the purification box (11) is fixedly connected to an adsorption tube (13), an axial flow fan is installed inside the adsorption tube (13), one end of the adsorption tube (13) is fixedly connected to an adsorption plate (12), one side of the adsorption plate (12) is fixedly connected to the inner wall of the protective cover (2), and one side of the adsorption plate (12) is provided with an adsorption port.

5. The automobile sheet metal cutting device according to claim 3, characterized in that: A filter screen 1 (14) and a filter screen 2 (16) are fixedly connected to one side of the inner wall of the purification box (11); the spray pipe (15) is located between the filter screen 1 (14) and the filter screen 2 (16); the top of the spray pipe (15) is fixedly connected to the top of the inner cavity of the purification box (11); and a collection box (19) is provided at the bottom of the spray pipe (15); the bottom of the collection box (19) is fixedly connected to the inner wall of the purification box (11).

6. The automobile sheet metal cutting device according to claim 5, characterized in that: One side of the second filter screen (16) is snap-connected with a lamp tube (18), one side of the lamp tube (18) is provided with a purification plate (17), and one side of the purification plate (17) is fixedly connected to the inner wall of the purification box (11).

7. The automobile sheet metal cutting device according to claim 1, characterized in that: A lead screw displacement assembly 1 (3) is installed on one side of the frame (5); a lead screw of the lead screw displacement assembly 1 (3) is connected to a lead screw displacement assembly 2 (4) via a thread; one end of the lead screw displacement assembly 2 (4) passes through the side wall of the protective cover (2).

8. The automobile sheet metal cutting device according to claim 7, characterized in that: The lead screw of the lead screw displacement assembly 2 (4) is connected to a placement plate (41) via a thread, the placement plate (41) is slidably connected to the protective cover (2), and one side is fixedly connected to a limiting member 1 (42).

9. The automobile sheet metal cutting device according to claim 8, characterized in that: One side of the placement plate (41) is rotatably connected to a threaded rod, the threaded rod is threadably connected to a second limiting member (43), and one side of the second limiting member (43) is slidably connected to the placement plate (41).

10. A method for using a device for cutting automobile sheet metal parts, characterized in that: An automobile sheet metal cutting device according to any one of claims 1 to 9 is used, comprising the following steps: S1. Place the sheet metal part to be cut on the placement plate (41), clamp it with the stopper 1 (42) and the stopper 2 (43), then adjust the position of the screw shift assembly 2 (4) with the screw shift assembly 1 (3), and use the screw on the screw shift assembly 2 (4) to move the placement plate (41) into the protective cover (2); S2, using the hydraulic push rod (7) and the hydraulic cylinder (72) to adjust the use height of the cutting assembly (73). After the adjustment, the motor (732) is used to drive the flat gear (739) to rotate, and the flat gear (739) is meshed with the flat gear (737), driving the flat gear (737) to rotate while revolving around the center of the flat gear (739), and the laser cutting head (736) and the flat gear (737) are synchronously revolved to perform circular cutting on the sheet metal part; S3, during cutting, the axial flow fan inside the adsorption tube (13) is used to accelerate the gas flow inside the protective cover (2), so that the exhaust gas passes through the adsorption plate (12) and enters the adsorption tube (13), and then is discharged into the purification box (11), filtered by the filter screen 1 (14), sprayed by the spray pipe (15), and then filtered by the filter screen 2 (16) and purified by the lamp tube (18) before being discharged from the exhaust port on one side of the purification box (11); S4. Open the drainage pipe on one side of the collecting box (19) to quickly discharge the waste liquid collected in the collecting box (19) to reduce the accumulation of waste liquid in the collecting box (19).

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