Sheet metal part surface defect repairing device

Abstract

The utility model relates to the technical field of sheet metal part repairing, in particular to a sheet metal part surface defect repairing device which is short in sheet metal part repairing preparation time, low in energy consumption, capable of repairing different positions of different types of sheet metal parts and low in limitation. Comprising a rack, a plurality of lower supporting seats and a driving mechanism, the lower supporting seats are installed on the lower portion of the rack and used for supporting qualified sheet metal parts, and the driving mechanism is installed in the middle of the rack; the sliding table is installed on the driving mechanism, the driving mechanism drives the sliding table to horizontally move above the qualified sheet metal part, the fixed end of the pushing cylinder is installed on the sliding table, the shaping cushion block is installed at the top of a piston rod of the pushing cylinder, the range finder is installed on the lower end face of the sliding table, and the loading assembly is installed on the sliding table. The distance measuring instrument is used for detecting the surface height of the qualified sheet metal part and electrically connected with a controller of the push cylinder, and the loading assembly is installed on the upper portion of the rack and used for loading the sheet metal part with defects on the surface.

Description

Technical Field

[0001] This utility model relates to the technical field of sheet metal repair, and in particular to a device for repairing surface defects in sheet metal parts. Background Technology

[0002] During the fabrication and transportation of sheet metal parts, some sheet metal parts inevitably develop surface defects due to processing errors, collisions, or other reasons. Various sheet metal repair devices have been proposed in the prior art. For example, the sheet metal reshaping and repair device proposed in Chinese invention patent application CN116276675A involves placing an appropriate amount of molding sand (a mixture of molding sand and water) in a molding sand tank to form a molding sand pile, and creating a shape and outline on the molding sand pile that simulates the shape and outline of the part to be repaired in the sheet metal to be repaired. Then, a refrigeration unit is started to cool the molding sand pile that simulates the shape and outline of the part to be repaired in the sheet metal to be repaired. When the temperature drops below zero degrees Celsius and remains so for a certain period of time, the water in the molding sand freezes and hardens. Then, the part to be repaired in the sheet metal to be repaired is placed on the frozen and hardened molding sand pile and clamped and fixed by a clamping mechanism. Then, a shot blasting unit is moved above the sheet metal to be repaired to perform shot blasting on the part to be repaired. Continuous hammering and automatic hammering are performed on the part to be repaired in the sheet metal to be repaired, so that the sheet metal to be repaired can be hammered into a preset structure.

[0003] However, the existing sand piles that need to be specially made to mimic the shape and outline of the part of the sheet metal to be repaired are time-consuming, and the method of hardening by freezing sand with water is energy-intensive. The strength of the sand pile after hardening is also not high, so it has great limitations. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a sheet metal repair device with short preparation time, low energy consumption, and the ability to repair different locations of different types of sheet metal parts with low limitation.

[0005] This utility model discloses a sheet metal surface defect repair device, comprising a frame, multiple lower support seats, and a drive mechanism. The multiple lower support seats are installed at the lower part of the frame and are used to support qualified sheet metal parts. The drive mechanism is installed in the middle of the frame. It also includes a slide table, a push cylinder, a rangefinder, and a loading assembly. The slide table is mounted on the drive mechanism, which drives the slide table to move horizontally above the qualified sheet metal parts. The fixed end of the push cylinder is mounted on the slide table, and a shaping pad is installed on the top of the piston rod of the push cylinder. The rangefinder is mounted on the lower end face of the slide table and is used to detect the surface height of the qualified sheet metal parts. The rangefinder is electrically connected to the controller of the push cylinder. The loading assembly is installed at the upper part of the frame and is used to load sheet metal parts with surface defects. During operation, qualified sheet metal parts are loaded onto the multiple lower support seats, and sheet metal parts with surface defects are loaded onto the loading assembly, with the two sheet metal parts positioned vertically. Alignment is achieved by driving the slide table to move below the surface defect of the sheet metal part. The rangefinder detects the distance A between the surface of the qualified sheet metal part and the rangefinder. The distance B between the rangefinder and the lower support is subtracted from the distance A to obtain the distance C between the outer surface of the qualified sheet metal part at the detection position and the lower support. The controller of the push cylinder controls the extension distance D of the piston rod according to the distance C. The extension distance D of the piston rod of the push cylinder is the distance C plus the distance F between the push cylinder pad and the base surface of the sheet metal part with the surface defect. This causes the top pad of the piston rod of the push cylinder to push the recessed surface defect from the bottom of the sheet metal part upwards, or to knock the recessed surface defect, thereby repairing the surface defect of the sheet metal part. Compared with the existing technology, there is no need to prepare the modeling part. It works at room temperature, which makes the preparation time short and the energy consumption low. Moreover, it can flexibly repair different positions of different types of sheet metal parts, with low limitations and good versatility.

[0006] Preferably, it also includes a mounting plate, which is horizontally mounted on the lower part of the frame. The mounting plate has multiple mounting holes arranged in a matrix, and multiple lower support seats are respectively mounted on the multiple mounting holes of the mounting plate. The multiple lower support seats are respectively mounted on the designated mounting holes of the mounting plate, so as to realize the support and installation of different types of qualified sheet metal parts, and the versatility is good.

[0007] Preferably, the drive mechanism includes two slide rails, two slide blocks, two lead screws, two stepper motors, a second slide rail, a second lead screw, and stepper motors. The two slide rails are respectively installed between the left and right columns of the frame. The two slide blocks are slidably installed on the two slide rails. The two lead screws are rotatably installed between the left and right columns of the frame. The two slide blocks are connected to the two lead screws via lead screw nuts. The two stepper motors are installed on the frame, and their output shafts are connected to the two lead screws. The two ends of the second slide rail are connected to the two slide blocks. The slide is slidably installed. On slide rail two, the two ends of lead screw two are rotatably connected to two slide blocks respectively. The slide table is driven by lead screw nut and lead screw two. Stepper motor is mounted on the slide block, and the output shaft of the stepper motor is driven by lead screw two. The two stepper motors rotate synchronously to drive the two lead screws to rotate. The two lead screws drive the slide blocks to move back and forth along the two slide rails one respectively through the two lead screw nuts. The two slide blocks drive the slide table to move back and forth through lead screw two. The stepper motor drives lead screw two to rotate. Lead screw two drives the slide table to move left and right along slide rail two through lead screw nut, so as to realize the horizontal movement of the slide table above the qualified sheet metal part, which has good practicality.

[0008] Preferably, the loading assembly includes multiple arm plates, multiple bolts, and multiple upper support seats. Each arm plate has a long slot. Multiple bolts are respectively installed on the tops of multiple columns of the frame, passing through the long slots of the arm plates and locking them in place. Multiple upper support seats are respectively installed on the inner ends of the arm plates. These upper support seats have the same structure as the lower support seats and are aligned vertically. The arm plates are moved along the long slots so that the upper support seats are directly above the lower support seats. The arm plates are locked to the frame by the bolts. Sheet metal parts with surface defects are loaded onto the upper support seats, aligning them directly above qualified sheet metal parts. This allows for flexible mounting of different sheet metal parts, providing good versatility and improving repair accuracy.

[0009] Preferably, it also includes multiple laser heads, which are respectively installed on the lower end face of multiple upper support seats, and the multiple laser heads are concentric with the positioning pins of the multiple upper support seats; when the position of the multiple upper support seats is adjusted, the multiple laser heads are turned on and emit laser beams vertically downward. When the multiple laser heads irradiate the top center of the positioning pins of the multiple lower support seats, the multiple upper support seats are vertically aligned with the multiple lower support seats, thereby improving the vertical alignment accuracy of the sheet metal parts.

[0010] Preferably, the assembly also includes two upright plates, a slide rail three, a slide table three, a top plate, multiple positioning screws, and multiple upper pads. The two upright plates are vertically mounted on the two slides. The two ends of the slide rail three are respectively connected to the upper ends of the two slides. The slide table three is slidably mounted on the slide rail three. The top plate is mounted below the slide table three. Multiple guide grooves are provided on the top plate. Multiple positioning screws are respectively installed in the multiple guide grooves of the top plate. Upper pads are installed at the lower ends of the multiple positioning screws. The slide table three moves along the slide rail three so that the top plate reaches above the surface defect of the sheet metal part. The positions of the multiple positioning screws in the multiple guide grooves of the top plate are adjusted so that the multiple positioning screws are located outside the defect. The height of the multiple positioning screws is adjusted so that the multiple upper pads are respectively pressed against the upper surface of the sheet metal part. When the piston rod of the push cylinder extends to repair the sheet metal part, deformation of other parts of the sheet metal part is avoided, thus improving the repair effect.

[0011] Preferably, it also includes a rotating shaft, which is installed on the lower end face of the slide table three, and the top plate is rotatably installed on the lower end of the rotating shaft; the top plate is rotatably installed on the lower part of the slide table three through the rotating shaft, so that the top plate and multiple positioning screws can rotate, thereby adapting to surface defects of different shapes and having good versatility.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: During operation, qualified sheet metal parts are loaded onto multiple lower support seats, and sheet metal parts with surface defects are loaded onto the loading assembly, aligning the two sheet metal parts vertically. The drive mechanism drives the slide to move below the surface defect area of ​​the sheet metal part. The rangefinder detects the distance A between the surface of the qualified sheet metal part and the rangefinder. The distance B between the rangefinder and the lower support seat is subtracted from the distance A to obtain the distance C between the outer surface of the qualified sheet metal part at the detection position and the lower support seat. The controller of the push cylinder operates according to the above... The piston rod extension distance D is controlled by distance C. The extension distance D of the piston rod of the push cylinder is distance C plus the distance F between the push cylinder pad and the base surface of the sheet metal part with surface defects. This allows the top pad of the piston rod of the push cylinder to push or knock the recessed surface defects from the bottom of the sheet metal part, thereby repairing the surface defects of the sheet metal part. Compared with the prior art, there is no need to prepare the modeling part. It works at room temperature, which makes the preparation time short and the energy consumption low. Moreover, it can flexibly repair different positions of different types of sheet metal parts, with low limitations and good versatility. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a front view structural diagram of the present invention;

[0015] Figure 3 This is a side view structural diagram of the present invention;

[0016] Figure 4It is a structural diagram of the frame, lower support, loading components, and mounting plate, etc.

[0017] Figure 5 It is a structural diagram of the drive mechanism, slide, push cylinder and rangefinder, etc.

[0018] Figure 6 It is a structural diagram of the slide rail three, slide table three, top plate, positioning screw, upper pad block and rotating shaft.

[0019] The following components are labeled in the attached diagram: 1. Frame; 2. Lower support base; 3. Drive mechanism; 4. Slide table; 5. Push cylinder; 6. Rangefinder; 7. Loading assembly; 8. Mounting plate; 9. Slide rail one; 10. Slide seat; 11. Lead screw one; 12. Stepper motor one; 13. Slide rail two; 14. Lead screw two; 15. Stepper motor; 16. Arm plate; 17. Bolt; 18. Upper support base; 19. Laser head; 20. Column plate; 21. Slide rail three; 22. Slide table three; 23. Top plate; 24. Positioning screw; 25. Upper pad; 26. Rotating shaft. Detailed Implementation

[0020] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example 1

[0021] like Figures 1 to 4As shown, a sheet metal surface defect repair device includes a frame 1, multiple lower support seats 2, and a drive mechanism 3. The multiple lower support seats 2 are installed on the lower part of the frame 1 and are used to support qualified sheet metal parts. The drive mechanism 3 is installed in the middle of the frame 1. It also includes a slide 4, a push cylinder 5, a rangefinder 6, and a loading assembly 7. The slide 4 is installed on the drive mechanism 3, and the drive mechanism 3 drives the slide 4 to move horizontally above the qualified sheet metal parts. The fixed end of the push cylinder 5 is installed on the slide 4, and a shaping pad is installed on the top of the piston rod of the push cylinder 5. The rangefinder 6 is installed on the lower end face of the slide 4 and is used to detect the surface height of the qualified sheet metal parts. The rangefinder 6 is electrically connected to the controller of the push cylinder 5. The loading assembly 7 is installed on the upper part of the frame 1 and is used to load sheet metal parts with surface defects. It also includes a mounting system. The mounting plate 8 is horizontally installed on the lower part of the frame 1. Multiple mounting holes are arranged in a matrix on the mounting plate 8, and multiple lower support seats 2 are respectively installed on the multiple mounting holes of the mounting plate 8. The loading assembly 7 includes multiple arm plates 16, multiple bolts 17, and multiple upper support seats 18. Each of the multiple arm plates 16 is provided with a long slot. The multiple bolts 17 are respectively installed on the top of multiple columns of the frame 1. The multiple bolts 17 pass through the long slots of the multiple arm plates 16 and lock the multiple arm plates 16. The multiple upper support seats 18 are respectively installed on the inner end of the multiple arm plates 16. The multiple upper support seats 18 have the same structure as the multiple lower support seats 2 and are aligned vertically. It also includes multiple laser heads 19, which are respectively installed on the lower end face of the multiple upper support seats 18. The multiple laser heads 19 are concentric with the positioning pins of the multiple upper support seats 18.

[0022] During operation, multiple lower support seats 2 are respectively installed on designated mounting holes of the mounting plate 8 to support and install different types of qualified sheet metal parts. Qualified sheet metal parts are loaded onto the multiple lower support seats 2. Multiple arm plates 16 are moved along the long slot, and multiple laser heads 19 are activated, emitting laser beams vertically downwards. When the laser heads 19 respectively irradiate the top center of the positioning pins of the multiple lower support seats 2, multiple upper support seats 18 are vertically aligned with the multiple lower support seats 2, so that the multiple upper support seats 18 are directly above the multiple lower support seats 2. Multiple bolts 17 lock the multiple arm plates 16 onto the frame 1. Sheet metal parts with surface defects are loaded onto the multiple upper support seats 18, aligning them directly above the qualified sheet metal parts. This achieves flexible mounting of different sheet metal parts. The sheet metal parts with surface defects are loaded onto the multiple upper support seats 18, and the two sheet metal parts... The drive mechanism 3 drives the slide 4 to move below the surface defect of the sheet metal part. The rangefinder 6 detects the distance A between the surface of the qualified sheet metal part and the rangefinder 6. The distance B between the rangefinder 6 and the lower support 2 is subtracted from the distance A to obtain the distance C between the outer surface of the qualified sheet metal part at the detection position and the lower support 2. The controller of the push cylinder 5 controls the extension distance D of the piston rod according to the distance C. The extension distance D of the piston rod of the push cylinder 5 is the distance C plus the distance F between the pad of the push cylinder 5 and the base surface of the sheet metal part with the surface defect. This causes the top pad of the piston rod of the push cylinder 5 to push the recessed surface defect from the bottom of the sheet metal part upward, or to knock the recessed surface defect, thereby repairing the surface defect of the sheet metal part. Compared with the existing technology, there is no need to prepare the modeling part. It works at room temperature, which makes the preparation time short and the energy consumption low. Moreover, it can flexibly repair different positions of different types of sheet metal parts, with low limitations and good versatility. Example 2

[0023] like Figure 1 and Figure 5As shown, based on Embodiment 1, the drive mechanism 3 includes two slide rails 9, two slide blocks 10, two lead screws 11, two stepper motors 12, a second slide rail 13, a second lead screw 14, and a stepper motor 15. The two slide rails 9 are respectively installed between the columns on the left and right sides of the frame 1. The two slide blocks 10 are slidably installed on the two slide rails 9. The two lead screws 11 are rotatably installed between the columns on the left and right sides of the frame 1. The two slide blocks 10 are respectively connected to the two lead screws 11 via lead screw nuts. 11. Transmission connection: Two stepper motors 12 are mounted on the frame 1. The output shafts of the two stepper motors 12 are respectively connected to the two lead screws 11. The two ends of the slide rail 13 are respectively connected to the two slide blocks 10. The slide table 4 is slidably mounted on the slide rail 13. The two ends of the lead screw 14 are respectively rotatably connected to the two slide blocks 10. The slide table 4 is connected to the lead screw 14 through the lead screw nut. Stepper motor 15 is mounted on the slide block 10. The output shaft of the stepper motor 15 is connected to the lead screw 14.

[0024] Two stepper motors 12 rotate synchronously, driving two lead screws 11 to rotate. The two lead screws 11 drive the slide block 10 to move back and forth along the two slide rails 9 through two lead screw nuts. The two slide blocks 10 drive the slide table 4 to move back and forth through the lead screw 2 14. The stepper motor 15 drives the lead screw 2 14 to rotate. The lead screw 2 14 drives the slide table 4 to move left and right along the slide rail 2 13 through the lead screw nut, so that the slide table 4 can move horizontally above the qualified sheet metal part. Example 3

[0025] like Figure 1 and Figure 6 As shown, based on Embodiment 1, it also includes two column plates 20, slide rail 3 21, slide table 3 22, top plate 23, multiple positioning screws 24, and multiple upper pads 25. The two column plates 20 are vertically mounted on the two slide blocks 10. The two ends of slide rail 3 21 are respectively connected to the upper ends of the two slide blocks 10. Slide table 3 22 is slidably mounted on slide rail 3 21. Top plate 23 is mounted below slide table 3 22. Multiple guide grooves are provided on top plate 23. Multiple positioning screws 24 are respectively installed in multiple guide grooves of top plate 23. Upper pads 25 are installed at the lower ends of multiple positioning screws 24. It also includes a rotating shaft 26, which is mounted on the lower end face of slide table 3 22. Top plate 23 is rotatably mounted on the lower end of rotating shaft 26.

[0026] The slide table 22 moves along the slide rail 21, so that the top plate 23 reaches above the surface defect of the sheet metal part. The positions of the multiple positioning screws 24 in the multiple guide grooves of the top plate 23 are adjusted. The top plate 23 is rotatably mounted on the lower part of the slide table 22 via the rotating shaft 26, so that the top plate 23 and the multiple positioning screws 24 can rotate, so that the multiple positioning screws 24 are located on the periphery of the defect, thereby adapting to surface defects of different shapes. The height of the multiple positioning screws 24 is adjusted so that the multiple upper pads 25 are respectively pressed against the upper surface of the sheet metal part. When the piston rod of the push cylinder 5 extends to repair the sheet metal part, other parts of the sheet metal part are prevented from deforming, thus improving the repair effect.

[0027] like Figures 1 to 6 As shown, this utility model discloses a sheet metal surface defect repair device. During operation, firstly, qualified sheet metal parts are loaded onto multiple lower support seats 2. Multiple upper support seats 18 are adjusted to be positioned above the lower support seats 2. Sheet metal parts with surface defects are then loaded onto the upper support seats 18, aligning the two sheet metal parts vertically. Next, the slide table 3 22 moves along the slide rail 3 21, causing the top plate 23 to reach above the surface defect of the sheet metal part. The positions of multiple positioning screws 24 in the guide grooves of the top plate 23 are adjusted, positioning the screws 24 around the defect. The height of the positioning screws 24 is adjusted so that multiple upper pads 25 abut against the upper surface of the sheet metal part. Then, the drive mechanism... 3. Drive the slide 4 to move below the surface defect of the sheet metal part. The rangefinder 6 detects the distance A between the surface of the qualified sheet metal part and the rangefinder 6. Subtract distance A from the distance B between the rangefinder 6 and the lower support 2 to obtain the distance C between the outer surface of the qualified sheet metal part at the detection position and the lower support 2. The controller of the push cylinder 5 controls the extension distance D of the piston rod according to the distance C. The extension distance D of the piston rod of the push cylinder 5 is the distance C plus the distance F between the pad of the push cylinder 5 and the base surface of the sheet metal part with the surface defect. Finally, the top pad of the piston rod of the push cylinder 5 pushes the recessed surface defect from the bottom of the sheet metal part upward, or knocks the recessed surface defect, so as to repair the surface defect of the sheet metal part.

[0028] The main functions achieved by this utility model are:

[0029] 1. Sheet metal repair has a short preparation time, low energy consumption, few limitations, and high work efficiency;

[0030] 2. It can repair different parts of different types of sheet metal parts, and has good versatility;

[0031] 3. It can prevent deformation of other parts of the sheet metal being repaired, thus improving the repair effect.

[0032] This utility model discloses a sheet metal surface defect repair device. Its installation, connection, or setting methods are all common mechanical methods, and any method that achieves the desired beneficial effect can be implemented. The frame 1, lower support 2, drive mechanism 3, slide table 4, push cylinder 5, rangefinder 6, loading assembly 7, mounting plate 8, slide rail 1 9, slide seat 10, lead screw 11, stepper motor 12, slide rail 2 13, lead screw 2 14, stepper motor 15, bolt 17, upper support 18, laser head 19, slide rail 3 21, slide table 3 22, positioning screw 24, upper pad 25, and rotating shaft 26 of this utility model are commercially available. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative effort from those skilled in the art.

[0033] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A sheet metal part surface defect repair device, comprising a frame (1), multiple lower support seats (2), and a drive mechanism (3), wherein the multiple lower support seats (2) are installed on the lower part of the frame (1) and are used to support qualified sheet metal parts, and the drive mechanism (3) is installed in the middle of the frame (1); characterized in that, It also includes a slide (4), a push cylinder (5), a rangefinder (6), and a loading assembly (7). The slide (4) is mounted on a drive mechanism (3), which drives the slide (4) to move horizontally above the qualified sheet metal parts. The fixed end of the push cylinder (5) is mounted on the slide (4), and a shaping pad is mounted on the top of the piston rod of the push cylinder (5). The rangefinder (6) is mounted on the lower end face of the slide (4). The rangefinder (6) is used to detect the surface height of the qualified sheet metal parts. The rangefinder (6) is electrically connected to the controller of the push cylinder (5). The loading assembly (7) is mounted on the upper part of the frame (1). The loading assembly (7) is used to load sheet metal parts with surface defects.

2. The sheet metal surface defect repair device as described in claim 1, characterized in that, It also includes a mounting plate (8), which is horizontally mounted on the lower part of the frame (1). Multiple mounting holes are arranged in a matrix on the mounting plate (8), and multiple lower support seats (2) are respectively mounted on the multiple mounting holes of the mounting plate (8).

3. The sheet metal surface defect repair device as described in claim 1, characterized in that, The drive mechanism (3) includes two slide rails (9), two slide blocks (10), two lead screws (11), two stepper motors (12), two slide rails (13), two lead screws (14), and a stepper motor (15). The two slide rails (9) are respectively installed between the columns on the left and right sides of the frame (1). The two slide blocks (10) are respectively slidably installed on the two slide rails (9). The two lead screws (11) are respectively rotatably installed between the columns on the left and right sides of the frame (1). The two slide blocks (10) are respectively connected to the two lead screws (11) through lead screw nuts. Two stepper motors (12) are mounted on the frame (1). The output shafts of the two stepper motors (12) are connected to the two lead screws (11) respectively. The two ends of the slide rail (13) are connected to the two slide blocks (10) respectively. The slide table (4) is slidably mounted on the slide rail (13). The two ends of the lead screw (14) are rotatably connected to the two slide blocks (10) respectively. The slide table (4) is connected to the lead screw (14) through the lead screw nut. The stepper motor (15) is mounted on the slide block (10). The output shaft of the stepper motor (15) is connected to the lead screw (14) respectively.

4. The sheet metal surface defect repair device as described in claim 1, characterized in that, The loading assembly (7) includes multiple arm plates (16), multiple bolts (17) and multiple upper support seats (18). Each of the multiple arm plates (16) is provided with a long slot. The multiple bolts (17) are respectively installed on the top of multiple columns of the frame (1). The multiple bolts (17) pass through the long slots of the multiple arm plates (16) and lock the multiple arm plates (16). The multiple upper support seats (18) are respectively installed on the inner end of the multiple arm plates (16). The multiple upper support seats (18) have the same structure as the multiple lower support seats (2) and are aligned vertically.

5. The sheet metal surface defect repair device as described in claim 4, characterized in that, It also includes multiple laser heads (19), which are respectively installed on the lower end face of multiple upper support seats (18), and the multiple laser heads (19) are concentric with the positioning pins of the multiple upper support seats (18).

6. The sheet metal surface defect repair device as described in claim 3, characterized in that, It also includes two column plates (20), slide rail three (21), slide table three (22), top plate (23), multiple positioning screws (24) and multiple upper pads (25). The two column plates (20) are vertically installed on the two slides (10). The two ends of the slide rail three (21) are respectively connected to the upper ends of the two slides (10). The slide table three (22) is slidably installed on the slide rail three (21). The top plate (23) is installed below the slide table three (22). Multiple guide grooves are provided on the top plate (23). Multiple positioning screws (24) are respectively installed in the multiple guide grooves of the top plate (23). The lower ends of the multiple positioning screws (24) are all equipped with upper pads (25).

7. The sheet metal surface defect repair device as described in claim 6, characterized in that, It also includes a rotating shaft (26), which is installed on the lower end face of the slide table three (22), and the top plate (23) is rotatably installed on the lower end of the rotating shaft (26).

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