Polishing device for outer edge of door plate of civil air defense door

Abstract

The utility model relates to the field of polishing devices, in particular to a door plate outer edge polishing device of a civil air defense door. The technical problems that an existing door plank outer edge polishing device of the civil air defense door can only be used for polishing the civil air defense door plank with the fixed size, a polishing head can only conduct polishing in the fixed direction, and the polishing effect is limited are solved, and compared with a traditional door plank outer edge polishing device of the civil air defense door, the polishing effect is limited. Comprising a workbench, a fixing assembly, a polishing assembly, civil air defense door plates and foot columns, the civil air defense door plates of different sizes can be clamped and fixed by arranging the adjustable fixing assembly, so that the polishing assembly can polish the civil air defense door plates of different sizes, and the applicability is higher; by arranging the adjustable polishing assembly, various different polishing requirements can be met, the adjustable polishing assembly can be better matched with the fixing assembly, and the polishing effect is better than that of a traditional polishing device under the mutual matching action of the fixing assembly and the polishing assembly.

Description

Technical Field

[0001] The utility model relates to the field of polishing devices, in particular to a polishing device for the outer edge of a door panel of a civil air defense door. Background Art

[0002] A civil air defense door is the door of the entrance of a civil air defense project. The function of a civil air defense door is to enter a protected area in the event of natural disasters such as war or earthquake, and it has a protective effect. The door panel of a civil air defense door is a special door panel with protective and airtight functions. It is usually manufactured by a molding process using a hydraulic press with SMC composite materials. Embedded parts are pre-buried in the door panel and formed under high temperature and high pressure by SMC, greatly increasing its strength. In order to improve aesthetics, reduce friction, prevent rust, and improve the sealing performance, the door panel of a civil air defense door is usually polished. A polishing device for the outer edge of the door panel of a civil air defense door is a device used to polish the outer edge of the door panel of a civil air defense door. The existing polishing devices for the outer edge of the door panel of a civil air defense door can usually only be used to polish civil air defense door panels of fixed sizes, and the polishing head can only polish along a fixed orientation, resulting in limited polishing effects. Summary of the Utility Model

[0003] In order to overcome the limitations of the existing polishing devices for the outer edge of the door panel of a civil air defense door, which can usually only be used to polish civil air defense door panels of fixed sizes, and the polishing head can only polish along a fixed orientation, resulting in limited polishing effects.

[0004] The technical solution of the present utility model is as follows: A polishing device for the outer edge of the door panel of a civil air defense door, which includes a workbench, a fixing component, a polishing component, a civil air defense door panel, and foot columns. In the middle of the upper end of the workbench, there is a fixing component for clamping and fixing the civil air defense door panel. Above the fixing component, there is a polishing component for polishing the outer edge of the civil air defense door panel. Around the four corners of the lower end of the workbench, there are foot columns for support. The fixing component includes a first bidirectional threaded rod, first sliders, a first driving motor, a first connecting block, a second driving motor, a mounting frame, pressing blocks, a first unidirectional threaded rod, a third driving motor, and a protection pad. On the outer side of the first bidirectional threaded rod, two groups of first sliders for sliding are symmetrically sleeved. The first driving motor drives the first bidirectional threaded rod to rotate, driving the two groups of first sliders to slide relatively along its surface. By setting the first driving motor to drive the first bidirectional threaded rod to rotate to drive the two groups of first sliders on its surface to slide relatively, the distance between the two groups of pressing blocks can be adjusted. The polishing component includes a second unidirectional threaded rod, second sliders, a fourth driving motor, a telescopic cylinder, an electric push rod, a cross beam, a second bidirectional threaded rod, a fifth driving motor, sliding columns, a second connecting block, a third connecting block, a fourth connecting block, a sixth driving motor, a seventh driving motor, a rotating shaft, and a polishing head. There are two groups of second unidirectional threaded rods symmetrically arranged. On the outer sides of the two groups of second unidirectional threaded rods, second sliders for sliding are sleeved. At the upper end of the second slider, there is a telescopic cylinder for controlling the up and down movement of the electric push rod. The upper ends of the two groups of electric push rods are fixedly connected by a cross beam. Between the inner sides of the upper ends of the two groups of electric push rods, there is a second bidirectional threaded rod for rotation. On the outer side of the second bidirectional threaded rod, two groups of sliding columns for sliding are symmetrically sleeved. The fifth driving motor drives the second bidirectional threaded rod to rotate, driving the sliding columns to slide along its surface. By setting the telescopic cylinder, the electric push rod can be controlled to drive the civil air defense door panel to move up and down to adjust its height. By rotating and driving the mounting frame, the distance between the two groups of sliding columns can be adjusted, so that the position of the polishing head can be changed.

[0005] Preferably, by setting an adjustable fixing component, it can be used to clamp and fix civil air defense door panels of different sizes, so that the polishing component can polish civil air defense door panels of different sizes, with stronger applicability. By setting an adjustable polishing component, various different polishing requirements can be met, and it can also be more adapted to the fixing component. Under the mutual cooperation of the fixing component and the polishing component, the polishing effect is better than that of traditional polishing devices.

[0006] Preferably, there are two sets of mounting brackets for mounting the pressing blocks disposed opposite to each other above the two sets of first sliders. The mounting brackets are rotatably connected to the first sliders through first connecting blocks. Both the second driving motor and the third driving motor are provided with output shafts. The output shaft of the second driving motor passes through the outside of the first connecting block and extends to the inside to drive the mounting bracket to rotate. By setting the second driving motor to drive the mounting bracket to rotate, the civil air defense door panel can be driven to rotate synchronously to adjust its inclination angle.

[0007] Preferably, a first one-way threaded rod for rotation is provided inside one end of the mounting bracket away from the first connecting block. A pressing block for pressing the civil air defense door panel is sleeved outside the first one-way threaded rod. The output shaft of the third driving motor passes through the upper end of the mounting bracket and extends to the inside to drive the first one-way threaded rod to rotate. Protective pads for protecting the civil air defense door panel are respectively provided in a fitting manner on the lower end of the pressing block and on the side of the mounting bracket opposite to the lower end of the pressing block. By providing the protective pads, it can be prevented that the clamping force of the pressing block and the mounting bracket is too large to cause damage to the civil air defense door panel.

[0008] Preferably, the lower end of the sliding column is rotatably connected to the third connecting block through the second connecting block. The second connecting block is rotatably connected to the fourth connecting block through the third connecting block. Sixth driving motors for driving are respectively provided outside the joints of the sliding column, the second connecting block, the third connecting block and the fourth connecting block. The three groups of sixth driving motors are respectively used to drive the second connecting block, the third connecting block and the fourth connecting block to rotate. By setting the sixth driving motors to drive the second connecting block, the third connecting block and the fourth connecting block to rotate, the position and angle of the polishing head can be adjusted so that different polishing requirements can be met.

[0009] Preferably, polishing heads for polishing and grinding the edges of the civil air defense door panel are disposed opposite to each other at one end where the two sets of fourth connecting blocks are close to each other. The polishing heads are rotatably connected to the fourth connecting blocks through rotating shafts. The seventh driving motor is provided with an output shaft. The output shaft of the seventh driving motor passes through one end of the fourth connecting block and extends to the other end to drive the rotating shaft to drive the polishing head to rotate. By oppositely disposing the two sets of polishing heads, the outer edges at both ends of the civil air defense door panel can be polished synchronously, which can greatly improve the polishing efficiency. By setting the seventh driving motor to drive the rotating shaft to drive the polishing head to rotate, the polishing head can perform rotary polishing.

[0010] The beneficial effects of the present utility model:

[0011] 1. Compared with the traditional polishing device for the outer edge of the door panel of civil air defense doors, it can usually only be used to polish civil air defense door panels of fixed sizes, and the polishing head can only polish along a fixed orientation, resulting in limitations in the polishing effect. By setting an adjustable fixing component, it can be used to clamp and fix civil air defense door panels of different sizes, so that the polishing component can polish civil air defense door panels of different sizes. By setting a pressing block, it can cooperate with the mounting frame to clamp and fix the civil air defense door panel. By setting a third driving motor, it can drive the first one-way threaded rod to rotate, so that during the rotation of the first two-way threaded rod, it can drive the pressing block to slide along its surface to adjust the tightness of pressing the civil air defense door panel. The pressing block that can adjust the tightness can be used to fix civil air defense door panels of different thicknesses. By setting a second driving motor, it can drive the mounting frame to rotate, so that during the rotation of the mounting frame, it can drive the civil air defense door panel to rotate to adjust its inclination angle to match the polishing component, so that the polishing component can polish the outer edge of the civil air defense door panel according to different polishing requirements. By setting a first driving motor, it can drive the first two-way threaded rod to rotate, so that the first two-way threaded rod can drive two first sliders on its surface to slide relatively to adjust the distance between the two pressing blocks. The pressing blocks whose distance can be adjusted can be used to fix civil air defense door panels of different lengths or widths, so that the fixing component can fix civil air defense door panels of different sizes.

[0012] 2. By setting an adjustable polishing component, it can meet a variety of different polishing requirements and can also be more adaptable to the fixing component. By setting a fourth driving motor, it can drive the second one-way threaded rod to rotate, so that during the rotation of the second one-way threaded rod, it can drive the second slider to slide along its surface to drive the polishing head to perform synchronous displacement, so that the polishing head can polish the civil air defense door panel from one end to the other end. By setting a telescopic cylinder, it can control the electric push rod to move up and down to drive the polishing head to move up and down to adjust the height. By setting a fifth driving motor, it can drive two sliding columns to slide relatively along their surfaces, so that the positions of the two polishing heads can be adjusted, so that the polishing head can be adjusted correspondingly according to civil air defense door panels of different sizes. By setting three sixth driving motors, they can be respectively used to drive the second connecting block, the third connecting block and the fourth connecting block to rotate, so that the position and angle of the polishing head can be finely adjusted to adapt to different polishing requirements. And by setting a seventh driving motor, it can drive the rotating shaft to drive the polishing head to rotate, so that the polishing head can perform rotational polishing. By relatively setting two polishing heads, the outer edges of both ends of the civil air defense door panel can be polished synchronously, which can greatly improve the polishing efficiency. The polishing component that can be adjusted in multiple angles and directions has stronger applicability, can meet a variety of different polishing requirements, and can also be more adaptable to the fixing component. Under the mutual cooperation of the fixing component and the polishing component, the polishing effect is better than that of the traditional polishing device. Description of the Drawings

[0013] Figure 1 The figure shows an overall schematic diagram of the outer edge polishing device for the door panel of the civil air defense door of the present utility model;

[0014] Figure 2 The figure shows a schematic diagram of the fixing component in the outer edge polishing device for the door panel of the civil air defense door of the present utility model;

[0015] Figure 3 The figure shows a schematic diagram of the pressing block in the outer edge polishing device for the door panel of the civil air defense door of the present utility model;

[0016] Figure 4 The figure shows a schematic diagram of the polishing component in the outer edge polishing device for the door panel of the civil air defense door of the present utility model;

[0017] Figure 5 The figure shows a schematic diagram of the polishing head in the outer edge polishing device for the door panel of the civil air defense door of the present utility model.

[0018] Description of the reference numerals: 1, workbench; 2, fixing component; 3, polishing component; 4, civil air defense door panel; 5, foot column; 201, first bidirectional threaded rod; 202, first slider; 203, first driving motor; 204, first connecting block; 205, second driving motor; 206, mounting bracket; 207, pressing block; 208, first unidirectional threaded rod; 209, third driving motor; 210, protective pad; 301, second unidirectional threaded rod; 302, second slider; 303, fourth driving motor; 304, telescopic cylinder; 305, electric push rod; 306, cross beam; 307, second bidirectional threaded rod; 308, fifth driving motor; 309, sliding column; 310, second connecting block; 311, third connecting block; 312, fourth connecting block; 313, sixth driving motor; 314, seventh driving motor; 315, rotating shaft; 316, polishing head. Detailed Embodiment

[0019] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0020] Please refer to Figure 1 , the present utility model provides an embodiment: an outer edge polishing device for the door panel of a civil air defense door, including a workbench 1, a fixing component 2, a polishing component 3, a civil air defense door panel 4 and a foot column 5. A fixing component 2 for clamping and fixing the civil air defense door panel 4 is provided in the middle of the upper end of the workbench 1, a polishing component 3 for polishing the outer edge of the civil air defense door panel 4 is provided above the fixing component 2, and foot columns 5 for support are provided around the four corners of the lower end of the workbench 1.

[0021] Please refer to Figures 2-3, in this embodiment, the fixing component 2 includes a first bidirectional threaded rod 201, a first slider 202, a first driving motor 203, a first connecting block 204, a second driving motor 205, a mounting bracket 206, a pressing block 207, a first unidirectional threaded rod 208, a third driving motor 209 and a protective pad 210. Two groups of first sliders 202 for sliding are symmetrically sleeved on the outer side of the first bidirectional threaded rod 201. The first driving motor 203 drives the two groups of first sliders 202 to slide relatively along its surface by driving the first bidirectional threaded rod 201 to rotate. By setting the first driving motor 203 to drive the first bidirectional threaded rod 201 to rotate to drive the two groups of first sliders 202 on its surface to slide relatively, the distance between the two pressing blocks 207 can be adjusted. Two groups of mounting brackets 206 for mounting the pressing blocks 207 are oppositely arranged above the two groups of first sliders 202. The mounting bracket 206 and the first slider 202 are rotatably connected by a first connecting block 204. Output shafts are provided on both the second driving motor 205 and the third driving motor 209. The output shaft of the second driving motor 205 passes through the outer side of the first connecting block 204 and extends to the inner side to drive the mounting bracket 206 to rotate. By setting the second driving motor 205 to drive the mounting bracket 206 to rotate, the civil air defense door panel 4 can be driven to rotate synchronously to adjust its inclination angle. One end of the mounting bracket 206 away from the first connecting block 204 is provided with a first unidirectional threaded rod 208 for rotation inside. A pressing block 207 for pressing the civil air defense door panel 4 is sleeved on the outer side of the first unidirectional threaded rod 208. The output shaft of the third driving motor 209 passes through the upper end of the mounting bracket 206 and extends to the inner side to drive the first unidirectional threaded rod 208 to rotate. A protective pad 210 for protecting the civil air defense door panel 4 is attached to the lower end of the pressing block 207 and the side of the mounting bracket 206 opposite to the lower end of the pressing block 207. By setting the protective pad 210, it can prevent the clamping force of the pressing block 207 and the mounting bracket 206 from being too large and causing damage to the civil air defense door panel 4.

[0022] Please refer to Figures 4-5, in this embodiment, the polishing assembly 3 includes a second one-way threaded rod 301, a second slider 302, a fourth driving motor 303, a telescopic cylinder 304, an electric push rod 305, a cross beam 306, a second two-way threaded rod 307, a fifth driving motor 308, a sliding column 309, a second connecting block 310, a third connecting block 311, a fourth connecting block 312, a sixth driving motor 313, a seventh driving motor 314, a rotating shaft 315 and a polishing head 316. There are two groups of the second one-way threaded rods 301 arranged symmetrically. The outer sides of the two groups of the second one-way threaded rods 301 are sleeved with second sliders 302 for sliding. The upper end of the second slider 302 is provided with a telescopic cylinder 304 for controlling the up and down movement of the electric push rod 305. The upper ends of the two groups of electric push rods 305 are fixedly connected through a cross beam 306. Between the inner sides of the upper ends of the two groups of electric push rods 305, there is a second two-way threaded rod 307 for rotation. The outer sides of the second two-way threaded rod 307 are symmetrically sleeved with two groups of sliding columns 309 for sliding. The fifth driving motor 308 drives the second two-way threaded rod 307 to rotate to drive the sliding columns 309 to slide along its surface. By setting the telescopic cylinder 304, the electric push rod 305 can be controlled to drive the civil air defense door panel 4 to move up and down to adjust its height. By rotating and driving through the mounting bracket 206, the distance between the two groups of sliding columns 309 can be adjusted, so that the position of the polishing head 316 can be changed. The lower end of the sliding column 309 is rotatably connected to the third connecting block 311 through the second connecting block 310. The second connecting block 310 is rotatably connected to the fourth connecting block 312 through the third connecting block 311. The outer sides of the joints of the sliding column 309, the second connecting block 310, the third connecting block 311 and the fourth connecting block 312 are all provided with sixth driving motors 313 for driving. The three groups of sixth driving motors 313 are respectively used to drive the second connecting block 310, the third connecting block 311 and the fourth connecting block 312 to rotate. By setting the sixth driving motor 313 to drive the second connecting block 310, the third connecting block 311 and the fourth connecting block 312 to rotate, the position and angle of the polishing head 316 can be adjusted, so that different polishing requirements can be met. One end of the two groups of fourth connecting blocks 312 close to each other is relatively provided with a polishing head 316 for polishing and grinding the edge of the civil air defense door panel 4. The polishing head 316 is rotatably connected to the fourth connecting block 312 through a rotating shaft 315. The seventh driving motor 314 is provided with an output shaft. The output shaft of the seventh driving motor 314 passes through one end of the fourth connecting block 312 and extends to the other end to drive the rotating shaft 315 to drive the polishing head 316 to rotate. By relatively arranging two groups of polishing heads 316, the outer edges of both ends of the civil air defense door panel 4 can be polished synchronously, which can greatly improve the polishing efficiency. By setting the seventh driving motor 314 to drive the rotating shaft 315 to drive the polishing head 316 to rotate, the polishing head 316 can perform rotary polishing.

[0023] When working, first place the workbench 1 on a flat ground, adjust the distance between the two sets of pressing blocks 207 to an appropriate size according to the size of the civil air defense door panel 4 to be polished, and drive the first bidirectional threaded rod 201 to rotate through the first driving motor 203, so that the first bidirectional threaded rod 201 drives the two first sliders 202 on its surface to slide relatively to adjust the distance between the two sets of pressing blocks 207 to an appropriate size;

[0024] Then place the civil air defense door panel 4 inside the two sets of mounting frames 206, and drive the first one-way threaded rod 208 to rotate through the third driving motor 209, so that the first bidirectional threaded rod 201 drives the pressing block 207 to slide along its surface during rotation until the pressing block 207 presses the upper surface of the civil air defense door panel 4, making the protective pad 210 closely fit the surface of the civil air defense door panel 4;

[0025] After that, polish the outer edge of the fixed civil air defense door panel 4 through the polishing assembly 3. Drive the second one-way threaded rod 301 to rotate through the fourth driving motor 303, so that the second one-way threaded rod 301 drives the second slider 302 to slide along its surface during rotation to move the polishing head 316 to one end of the civil air defense door panel 4;

[0026] Then drive the two sets of sliding columns 309 to slide relatively along their surfaces through the fifth driving motor 308 to move the polishing head 316 to a position close to the edge of the civil air defense door panel 4;

[0027] Finally, drive the rotating shaft 315 to drive the polishing head 316 to rotate through the seventh driving motor 314, so that the polishing head 316 rotates and polishes the edge of the civil air defense door panel 4;

[0028] During the polishing process, drive the second connecting block 310, the third connecting block 311 and the fourth connecting block 312 to rotate respectively through the three sixth driving motors 313 to finely adjust the position and angle of the polishing head 316 to meet different polishing requirements;

[0029] And drive the second one-way threaded rod 301 to rotate through the fourth driving motor 303 so that the polishing head 316 moves from the edge of one end of the civil air defense door panel 4 to the other end until the outer edge of one end is completely polished;

[0030] During the polishing process, the inclination angle of the civil air defense door panel 4 can also be finely adjusted to match the polishing head 316. Drive the mounting frame 206 to rotate through the second driving motor 205, so that the mounting frame 206 drives the civil air defense door panel 4 to rotate during rotation to adjust its inclination angle;

[0031] When the outer edges of the left and right ends of the civil air defense door panel 4 are all polished, the polished two ends are clamped and fixed by the fixing component 2, and then the remaining two ends can be polished continuously.

[0032] Through the above steps, the staff first place the workbench 1 on a stable ground, adjust the distance between the two sets of pressing blocks 207 to an appropriate size according to the size of the civil air defense door panel 4 to be polished, drive the first bidirectional threaded rod 201 to rotate by the first driving motor 203, so that the first bidirectional threaded rod 201 drives the two sets of first sliders 202 on its surface to slide relatively to adjust the distance between the two sets of pressing blocks 207 to an appropriate size. Then, place the civil air defense door panel 4 inside the two mounting frames 206, and drive the first unidirectional threaded rod 208 to rotate by the third driving motor 209, so that the first bidirectional threaded rod 201 drives the pressing block 207 to slide along its surface during rotation until the pressing block 207 presses the upper surface of the civil air defense door panel 4, making the protective pad 210 closely fit the surface of the civil air defense door panel 4. By setting the adjustable fixing component 2, it can be used to clamp and fix civil air defense door panels 4 of different sizes. By setting the protective pad 210, it can protect the civil air defense door panel 4 from being damaged by excessive pressure. After that, polish the outer edge of the fixed civil air defense door panel 4 through the polishing component 3. Drive the second unidirectional threaded rod 301 to rotate by the fourth driving motor 303, so that the second unidirectional threaded rod 301 drives the second slider 302 to slide along its surface during rotation to move the polishing head 316 to one end of the civil air defense door panel 4. Then, drive the two sets of sliding columns 309 to slide relatively along their surfaces by the fifth driving motor 308 to move the polishing head 316 to a position close to the edge of the civil air defense door panel 4. Finally, drive the rotating shaft 315 to drive the polishing head 316 to rotate by the seventh driving motor 314, so that the polishing head 316 rotates and polishes the edge of the civil air defense door panel 4. During the polishing process, drive the second connecting block 310, the third connecting block 311, and the fourth connecting block 312 to rotate respectively by the three sixth driving motors 313 to finely adjust the position and angle of the polishing head 316 to meet different polishing requirements. And drive the second unidirectional threaded rod 301 to rotate by the fourth driving motor 303 to move the polishing head 316 from the edge of one end of the civil air defense door panel 4 to the other end until the entire outer edge of one end is polished. During the polishing process, the inclination angle of the civil air defense door panel 4 can also be finely adjusted to adapt to the polishing head 316. Drive the mounting frame 206 to rotate by the second driving motor 205, so that the mounting frame 206 drives the civil air defense door panel 4 to rotate during rotation to adjust its inclination angle. When the outer edges of the left and right ends of the civil air defense door panel 4 are polished, clamp and fix the polished two ends through the fixing component 2, and continue to polish the remaining two ends. By setting the adjustable polishing component 3, it can meet a variety of different polishing requirements and can also be more compatible with the fixing component 2. Under the combined action of the fixing component 2 and the polishing component 3, the polishing effect is better than that of traditional polishing devices.

[0033] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments, and various changes can be made without departing from the gist of the present utility model within the scope of knowledge possessed by those skilled in the art.

Claims

1. A polishing device for the outer edge of the door panel of a civil air defense door, comprising a workbench (1); characterized in that: It also includes a fixing component (2), a polishing component (3), a civil air defense door panel (4), and foot columns (5). In the middle of the upper end of the workbench (1), there is a fixing component (2) for clamping and fixing the civil air defense door panel (4). Above the fixing component (2), there is a polishing component (3) for polishing the outer edge of the civil air defense door panel (4). Around the four corners of the lower end of the workbench (1), there are foot columns (5) for support; The fixing component (2) includes a first bidirectional threaded rod (201), first sliders (202), a first driving motor (203), a first connecting block (204), a second driving motor (205), a mounting bracket (206), a pressing block (207), a first unidirectional threaded rod (208), a third driving motor (209), and a protective pad (210). On the outer side of the first bidirectional threaded rod (201), two groups of first sliders (202) for sliding are symmetrically sleeved. The first driving motor (203) drives the two groups of first sliders (202) to slide relatively along its surface by driving the first bidirectional threaded rod (201) to rotate; The polishing component (3) includes a second unidirectional threaded rod (301), second sliders (302), a fourth driving motor (303), a telescopic cylinder (304), an electric push rod (305), a cross beam (306), a second bidirectional threaded rod (307), a fifth driving motor (308), sliding columns (309), a second connecting block (310), a third connecting block (311), a fourth connecting block (312), a sixth driving motor (313), a seventh driving motor (314), a rotating shaft (315), and a polishing head (316). Two groups of second unidirectional threaded rods (301) are symmetrically arranged. On the outer sides of the two groups of second unidirectional threaded rods (301), second sliders (302) for sliding are sleeved. On the upper end of the second slider (302), there is a telescopic cylinder (304) for controlling the up and down movement of the electric push rod (305). The upper ends of the two electric push rods (305) are fixedly connected through a cross beam (306). Between the inner sides of the upper ends of the two electric push rods (305), there is a second bidirectional threaded rod (307) for rotation. On the outer side of the second bidirectional threaded rod (307), two groups of sliding columns (309) for sliding are symmetrically sleeved. The fifth driving motor (308) drives the sliding columns (309) to slide along its surface by driving the second bidirectional threaded rod (307) to rotate.

2. The polishing device for the outer edge of the door panel of a civil air defense door according to claim 1, wherein: Above the two groups of first sliders (202), two groups of mounting brackets (206) for installing the pressing block (207) are oppositely arranged. The mounting bracket (206) is rotatably connected to the first slider (202) through a first connecting block (204). The output shafts are provided on both the second driving motor (205) and the third driving motor (209). The output shaft of the second driving motor (205) passes through the outer side of the first connecting block (204) and extends to the inner side to drive the mounting bracket (206) to rotate.

3. The polishing device for the outer edge of the door panel of a civil air defense door according to claim 2, characterized in that: On the inner side of one end of the mounting bracket (206) away from the first connecting block (204), there is a first one-way threaded rod (208) for rotation. A pressing block (207) for pressing the civil air defense door panel (4) is sleeved on the outer side of the first one-way threaded rod (208). The output shaft of the third driving motor (209) passes through the upper end of the mounting bracket (206) and extends to the inner side to drive the first one-way threaded rod (208) to rotate. A protective pad (210) for protecting the civil air defense door panel (4) is provided in a fitting manner at the lower end of the pressing block (207) and on the side of the mounting bracket (206) opposite to the lower end of the pressing block (207).

4. A polishing device for the outer edge of the door panel of a civil air defense door according to claim 3, characterized in that: The lower end of the sliding column (309) is rotatably connected to the third connecting block (311) through the second connecting block (310). The second connecting block (310) is rotatably connected to the fourth connecting block (312) through the third connecting block (311). Sixth driving motors (313) for driving are provided on the outer sides of the joints of the sliding column (309), the second connecting block (310), the third connecting block (311) and the fourth connecting block (312). The three groups of sixth driving motors (313) are respectively used to drive the second connecting block (310), the third connecting block (311) and the fourth connecting block (312) to rotate.

5. The polishing device for the outer edge of the door panel of a civil air defense door according to claim 4, characterized in that: Polishing heads (316) for polishing and grinding the edge of the civil air defense door panel (4) are oppositely arranged at the relatively close ends of the two groups of fourth connecting blocks (312). The polishing heads (316) are rotatably connected to the fourth connecting blocks (312) through rotating shafts (315). The output shaft is provided on the seventh driving motor (314). The output shaft of the seventh driving motor (314) passes through one end of the fourth connecting block (312) and extends to the other end to drive the rotating shaft (315) to drive the polishing head (316) to rotate.

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