Automatic welding production line equipment for civil air defense steel structure door leaf

Abstract

The utility model provides automatic welding production line equipment for civil air defense steel structure door leaves, and belongs to the technical field of steel structure door leaf production and welding. A first welding station, a first overturning station, a second welding station, a transition station, a third welding station, a second overturning station and a discharging station are sequentially arranged on the linear rail in the length direction of the linear rail. The first welding station, the second welding station and the third welding station are each provided with a lifting carrying trolley, two grouping supporting tables and two cantilever welding robot devices. Two lifting turnover devices are arranged on each of the first turnover station and the second turnover station; the transition station and the discharging station are each provided with two grouping supporting tables. According to the welding production line equipment, the lifting carrying trolley is adopted to complete the transfer work of the steel structure door leaf on the production line, the cantilever welding robot device is adopted to complete the main welding procedure of the steel structure door leaf, the layout of all stations and the selection of parts are reasonable, and the production efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel structure door leaf production welding, in particular to automatic welding production line equipment for civil air defense steel structure door leaves. Background Art

[0002] With the rapid development of modern industry, steel door panels have been widely used in many fields such as construction, transportation, and energy due to their high strength, good durability, and convenient installation. Steel door panels are important access protection equipment in civil air defense facilities. Steel door panels are generally composed of steel door frames and steel door panels installed on the steel door frames. The steel door panels are welded together by the door frame, panels on both sides of the frame, and accessories. At present, most of the welding of steel door panels in my country adopts a simple manual positioning, clamping, and manual welding production method. Due to the large size and weight of steel door panels, there are many parts required for welding. The workload of the entire positioning, clamping, and welding is huge. The excessive proportion of manual operation can easily cause fatigue to the operators, resulting in low production efficiency. In addition, the quality of the welds of manual welding is unstable, and it is not easy to control the welding deformation of the workpiece, which affects the product qualification rate and increases the difficulty of subsequent workpiece correction. It is difficult to meet the needs of large-scale and high-efficiency production. Utility Model Content

[0003] In view of the above-mentioned problems in the prior art, the utility model aims to provide an automated welding production line equipment for civil air defense steel structure door leaves, which solves the problems of low efficiency and unstable welding quality in manual welding of steel structure door leaves.

[0004] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0005] Provided is an automated welding production line equipment for civil air defense steel structure door panels, which includes a linear track, wherein a first welding station, a first flipping station, a second welding station, a transition station, a third welding station, a second flipping station and a discharge station are sequentially arranged along the length direction of the linear track;

[0006] The first welding station, the second welding station and the third welding station are each equipped with a lifting and transporting trolley, two team support platforms and two cantilever welding robot devices; each lifting and transporting trolley is slidably matched with the linear track; both sides of each lifting and transporting trolley are equipped with team support platforms with the bottom fixedly connected to the ground; a cantilever welding robot device is arranged on the outside of each team support platform;

[0007] The first flipping station and the second flipping station are both provided with two lifting and flipping devices located on both sides of the linear track;

[0008] Two team support platforms are provided at the transition station and the unloading station, which are located on both sides of the linear track and the bottoms of which are fixedly connected to the ground.

[0009] The basic principle of the automatic welding production line equipment for civil air defense steel structure door leaves in the utility model is: when welding steel structure door leaves, firstly, the team door leaf frame and the outer panel are placed on the two team support tables in the first welding station by manual loading, and then the two cantilever welding robot devices are started to automatically complete the spot welding work of the team door leaf frame and the outer panel. When the spot welding work is completed, the team door leaf frame and the outer panel are pre-fixed, and then the lifting and transporting trolley is started. The lifting and transporting trolley lifts the team door leaf frame and the outer panel from the two team support tables and transports them to the two flipping devices in the first flipping station, and the two flipping devices are started to complete the flipping of the team door leaf frame and the outer panel; the lifting and transporting trolley on the second welding station The team door leaf frames and outer panels on the two flip devices are unloaded and transported to the second welding station. The cantilever welding robot device on the second welding station completes the full welding of the team door leaf frames and outer panels. After the full welding of the team door leaf frames and outer panels is completed, they enter the transition station, and the lifting and transporting trolley in the third welding station lifts and transports the team door leaf frames and outer panels after full welding to the third welding station. Then the cantilever welding robot device on the third welding station is started to weld the team door leaf frames and inner panels as well as weld the outer panels around. After the welding is completed, the lifting and transporting trolley on the third station transports the steel structure door leaves to the unloading station for easy flow into the next production process, thus completing the automated welding of the steel structure door leaves.

[0010] Furthermore, a clamping mechanism is provided on the first welding station, which can clamp and fix the steel structure door leaf of the first welding station on the two team support platforms to prevent the steel structure door leaf from being offset during the welding process.

[0011] Further, as a specific arrangement of the lifting and transporting trolley, each lifting and transporting trolley includes a trolley lower frame, a front axle and a rear axle are arranged at the bottom of the trolley lower frame, and a roller matching with the linear track is arranged at both ends of the front axle and the rear axle;

[0012] A driven wheel is arranged in the middle of the front axle; a driving motor is arranged on the lower frame of the trolley, a driving wheel is arranged at the output end of the driving motor, and a belt is used to drive the driving wheel and the driven wheel;

[0013] A worm gear lift is arranged at each of the four corners of the trolley lower frame, and a trolley upper frame is arranged on the top of the trolley lower frame, and the lower end surface of the trolley upper frame is fixedly connected with the worm tops of the four worm gear lifts.

[0014] The driving motor can drive the front axle and the rollers on the front axle to rotate through the driving wheel, the driven wheel and the belt, thereby realizing the reciprocating linear motion of the lifting and transporting trolley on the linear track; and the four worm gear lifts can lift and lower the frame on the trolley, thereby realizing the linear and vertical movement of the steel structure door leaf on the upper end face of the frame on the trolley.

[0015] Furthermore, a synchronous lifting device is provided between the lower frame of the trolley and the upper frame of the trolley, and the synchronous lifting device includes a plurality of spiral bevel gear steering boxes, and the output ends of the plurality of spiral bevel gear steering boxes are fixedly connected to the worm gears in the four worm gear elevators through a plurality of connecting shafts. By providing a plurality of spiral bevel gear steering boxes, the worm gears in the four worm gear elevators can be simultaneously raised or lowered, ensuring that the upper frame of the trolley and the steel structure door leaf thereon are lifted or lowered at the same time, avoiding skew.

[0016] Further, as a specific arrangement of the lifting and flipping device, each lifting and flipping device includes a flipping stand arranged on one side of the linear track, and two slide rails and a rotating trapezoidal screw are vertically arranged on the flipping stand;

[0017] A lifting plate is arranged on the flip stand, and two sliders, a screw nut and a rotating drive motor are fixedly arranged on the back of the lifting plate; a turntable bearing is arranged on the front of the lifting plate, and an annular tooth is arranged on the inner ring of the turntable bearing;

[0018] The two sliders are respectively slidably matched with the two slide rails, the lead screw nut is threadedly matched with the rotating trapezoidal lead screw, and the output end of the rotating drive motor passes through the lifting vertical plate and is provided with a driving gear meshing with the circular ring teeth;

[0019] A turning frame is arranged on one side of the lifting vertical plate, one side of the turning frame is fixedly connected to the end face of the turntable bearing through a slewing plate, a horizontal notch for accommodating the steel structure door leaf is arranged on the turning frame, and a plurality of hydraulic cylinders are arranged on the turning frame, and the output end of each hydraulic cylinder is located in the horizontal notch and a clamping block is arranged thereon.

[0020] The process of flipping the steel structure door leaf by the lifting and flipping device is as follows: the lifting and transporting trolley transports the steel structure door leaf to the horizontal gaps of the two lifting and flipping device bells, and the two sides of the steel structure door leaf are respectively located in the two horizontal gaps, and then multiple hydraulic cylinders are started, and the output ends of the multiple hydraulic cylinders extend to drive the clamping blocks to squeeze the steel structure door leaf and fix the steel structure door leaf on the flip frame, and then the trapezoidal screw is rotated to drive the lifting vertical plate connected to the two sliders to rise in the vertical direction, and the rising lifting vertical plate drives the flip frame and its steel structure door leaf to rise until the steel structure door leaf does not interfere with other components and stops, and finally the rotating drive motor drives the turntable bearing to rotate through the driving gear, thereby realizing the flip frame and the steel structure door leaf on it to rotate 180°, completing the rotation of the steel structure door leaf.

[0021] Furthermore, as a specific arrangement for driving the rotating trapezoidal screw to rotate around its own axis, a rotating motor is arranged on the top of the flip stand, and the output end of the rotating motor is arranged vertically and fixedly connected to the top of the rotating trapezoidal screw.

[0022] Furthermore, as a specific setting method of the clamping mechanism, each clamping mechanism includes two limit seats respectively on both sides of the linear track, a bearing seat is vertically slidably arranged in each limit seat, a transmission screw is arranged on each limit seat, each transmission screw is driven to rotate by a servo motor, and each bearing seat is provided with a connecting block that cooperates with the transmission screw thread; a clamping roller shaft is rotatably arranged between the two bearing seats, and a supporting roller shaft is rotatably arranged below the clamping roller shaft.

[0023] Furthermore, each limiting seat is fixedly connected to the team support platform.

[0024] The beneficial effects of the utility model are: 1. The automatic welding production line equipment for civil air defense steel structure door leaves of the utility model adopts a lifting and transporting trolley to complete the transfer of steel structure door leaves on the production line, and adopts a cantilever welding robot device to complete the main welding process of steel structure door leaves. The layout of each workstation and the selection of components are reasonable, the production efficiency is high, the product quality is stable, the working conditions of workers are good, manual operation is reduced, and the production cycle of products can be shortened.

[0025] 2. The utility model of the utility model of the automatic welding production line equipment for civil air defense steel structure door leaf can reduce the risk of workers directly contacting welding equipment and high temperature environment and improve work safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the automated welding production line equipment for civil air defense steel structure door panels.

[0027] Figure 2 It is a structural diagram of the lifting and transporting trolley.

[0028] Figure 3 The structure diagram of the lifting and flipping device Figure 1 .

[0029] Figure 4 The structure diagram of the lifting and flipping device Figure 2 .

[0030] Figure 5 It is a structural schematic diagram of the clamping mechanism.

[0031] Among them, 1. linear track; 2. first welding station; 3. first flipping station; 4. second welding station; 5. transition station; 6. third welding station; 7. second flipping station; 8. unloading station; 9. lifting and transporting trolley; 901. lower frame of trolley; 902. front axle; 903. rear axle; 904. roller; 905. driven wheel; 906. driving motor; 907. driving wheel; 908. belt; 909. worm gear lift; 910. upper frame of trolley; 911. spiral bevel gear steering box; 10. team support platform; 11. cantilever welding robot device; 12. lifting and flipping device; 120 1. Flip stand; 1202. Slide rail; 1203. Rotating trapezoidal lead screw; 1204. Lifting stand; 1205. Sliding block; 1206. Lead screw nut; 1207. Turntable bearing; 1208. Flip stand; 1209. Rotating plate; 1210. Horizontal notch; 1211. Hydraulic cylinder; 1212. Clamping block; 1213. Rotating motor; 1214. Rotating drive motor; 13. Clamping mechanism; 1301. Limit seat; 1302. Bearing seat; 1303. Transmission lead screw; 1304. Servo motor; 1305. Connecting block; 1306. Clamping roller shaft; 1307. Support roller shaft. DETAILED DESCRIPTION

[0032] The specific implementation modes of the present invention are described below to facilitate the understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0033] like Figure 1 to Figure 5 As shown, the utility model provides an automatic welding device for a suspended plate valve, which includes a linear track 1, on which a first welding station 2, a first turning station 3, a second welding station 4, a transition station 5, a third welding station 6, a second turning station 7 and a discharge station 8 are sequentially arranged along the length direction of the linear track 1.

[0034] The first welding station 2, the second welding station 4 and the third welding station 6 are each provided with a lifting and transporting trolley 9, two team support platforms 10 and two cantilever welding robot devices 11; each lifting and transporting trolley 9 is slidably matched with the linear track 1; both sides of each lifting and transporting trolley 9 are provided with team support platforms 10 whose bottoms are fixedly connected to the ground; a cantilever welding robot device 11 is provided on the outer side of each team support platform 10.

[0035] The first turning station 3 and the second turning station 7 are both provided with two lifting and turning devices 12 located on both sides of the linear track 1 .

[0036] Two team support platforms 10 are provided on both the transition station 5 and the unloading station 8, which are located on both sides of the linear track 1 and the bottom of which is fixedly connected to the ground.

[0037] The basic principle of the automatic welding production line equipment for civil air defense steel structure door leaves in the utility model is: when welding steel structure door leaves, firstly, the team door leaf frame and the outer panel are placed on the two team support platforms 10 in the first welding station 2 by manual loading, and then the two cantilever welding robot devices 11 are started to automatically complete the spot welding work of the team door leaf frame and the outer panel. When the spot welding work is completed, the team door leaf frame and the outer panel are pre-fixed, and then the lifting and transporting trolley 9 is started. The lifting and transporting trolley 9 lifts the team door leaf frame and the outer panel from the two team support platforms 10 and transports them to the two flipping devices in the first flipping station 3, and the two flipping devices are started to complete the flipping of the team door leaf frame and the outer panel; the lifting and transporting trolley 9 on the second welding station 4 The team door leaf frames and outer panels on the two flip devices are unloaded and transported to the second welding station 4. The cantilever welding robot device 11 on the second welding station 4 completes the full welding of the team door leaf frames and outer panels. After the full welding of the team door leaf frames and outer panels is completed, they enter the transition station 5, and the lifting and transporting trolley 9 in the third welding station 6 lifts and transports the team door leaf frames and outer panels after full welding to the third welding station 6. Then, the cantilever welding robot device 11 on the third welding station 6 is started to weld the team door leaf frames and the inner panels and weld the outer panels around. After the welding is completed, the lifting and transporting trolley 9 on the third station transports the steel structure door leaves to the unloading station 8 for easy flow into the next production process. The automated welding of the steel structure door leaves is completed.

[0038] Specifically, in the utility model, the cantilever welding robot device 11 belongs to the prior art, such as the utility model patent with publication number CN210147311U and the name of a cantilever welding robot.

[0039] like Figure 1 and Figure 5 As shown, a clamping mechanism 13 is provided on the first welding station 2. The clamping mechanism 13 is used to clamp and fix the steel structure door leaf of the first welding station 2 on the two team support platforms 10 to prevent the steel structure door leaf from shifting during the welding process; specifically, Figure 1 and Figure 4As shown, as a specific arrangement of the clamping mechanism 13, each clamping mechanism 13 includes two limit seats 1301 respectively on both sides of the linear track 1, a bearing seat 1302 is vertically slidably arranged in each limit seat 1301, a transmission screw 1303 is arranged on each limit seat 1301, each transmission screw 1303 is driven to rotate by a servo motor 1304, and each bearing seat 1302 is provided with a connecting block 1305 threadedly matched with the transmission screw 1303; a clamping roller shaft 1306 is rotatably arranged between the two bearing seats 1302, and a supporting roller shaft 1307 is rotatably arranged below the clamping roller shaft 1306. Further, each limit seat 1301 is fixedly connected to the team support platform 10.

[0040] like Figure 2 As shown, as a specific arrangement of the lifting and transporting trolley 9, each lifting and transporting trolley 9 includes a trolley lower frame 901, a front axle 902 and a rear axle 903 are arranged at the bottom of the trolley lower frame 901, and a roller 904 matching with the linear track 1 is arranged at both ends of the front axle 902 and the rear axle 903;

[0041] A driven wheel 905 is provided in the middle of the front axle 902; a driving motor 906 is provided on the lower frame 901 of the trolley, a driving wheel 907 is provided at the output end of the driving motor 906, and a belt 908 is used to transmit the power between the driving wheel 907 and the driven wheel 905;

[0042] A worm gear lift 909 is provided at each of the four corners of the trolley lower frame 901 , and a trolley upper frame 910 is provided on the top of the trolley lower frame 901 , and the lower end surface of the trolley upper frame 910 is fixedly connected to the worm tops of the four worm gear lifts 909 .

[0043] The driving motor 906 can drive the front axle 902 and the roller 904 on the front axle 902 to rotate through the driving wheel 907, the driven wheel 905 and the belt 908, thereby realizing the reciprocating linear motion of the lifting and transporting trolley 9 on the linear track 1; and the four worm gear lifts 909 can lift and lower the trolley upper frame 910, thereby realizing the linear and vertical movement of the steel structure door leaf on the upper end surface of the trolley upper frame 910.

[0044] Preferably, but not limited to, a synchronous lifting device is provided between the lower frame 901 of the trolley and the upper frame 910 of the trolley, and the synchronous lifting device includes a plurality of spiral bevel gear steering boxes 911, and the output ends of the plurality of spiral bevel gear steering boxes 911 are fixedly connected to the worm gears in the four worm gear elevators 909 through a plurality of connecting shafts. By providing a plurality of spiral bevel gear steering boxes 911, the worms in the four worm gear elevators 909 can be simultaneously raised or lowered, ensuring that the upper frame 910 of the trolley and the steel structure door leaf thereon are lifted or lowered at the same time, and avoiding skew.

[0045] like Figure 1 , Figure 3 and Figure 4 As shown, as a specific arrangement of the lifting and flipping device 12, each lifting and flipping device 12 includes a flip stand 1201 arranged on one side of the linear track 1, and two slide rails 1202 and a rotating trapezoidal screw rod 1203 are vertically arranged on the flip stand 1201;

[0046] A lifting stand 1204 is provided on the flip stand 1201, and two sliders 1205, a screw nut 1206 and a rotary drive motor 1214 are fixedly provided on the back of the lifting stand 1204; a turntable bearing 1207 is provided on the front of the lifting stand 1204, and an annular tooth is provided on the inner ring of the turntable bearing 1207;

[0047] The two sliders 1205 are respectively slidably matched with the two slide rails 1202, the screw nut 1206 is threadedly matched with the rotating trapezoidal screw 1203, and the output end of the rotating drive motor 1214 passes through the lifting vertical plate 1204 and is provided with a driving gear meshing with the circular ring teeth;

[0048] A turning frame 1208 is provided on one side of the lifting vertical plate 1204, and one side of the turning frame 1208 is fixedly connected to the end face of the turntable bearing 1207 through a rotating plate 1209. A horizontal notch 1210 for accommodating the steel structure door leaf is provided on the turning frame 1208. A plurality of hydraulic cylinders 1211 are provided on the turning frame 1208, and the output end of each hydraulic cylinder 1211 is located in the horizontal notch 1210 and a clamping block 1212 is provided thereon.

[0049] The process of the lifting and flipping device 12 flipping the steel structure door leaf is as follows: the lifting and transporting trolley 9 transports the steel structure door leaf to the horizontal gaps 1210 of the two lifting and flipping devices 12, and the two sides of the steel structure door leaf are respectively located in the two horizontal gaps 1210, and then the multiple hydraulic cylinders 1211 are started, and the output ends of the multiple hydraulic cylinders 1211 extend to drive the clamping blocks 1212 to squeeze the steel structure door leaf and fix the steel structure door leaf on the flip frame 1208, and then the rotating trapezoidal screw rod 1203 is rotated to drive the lifting plate 1204 connected to the two sliders 1205 to rise in the vertical direction, and the rising lifting plate 1204 drives the flip frame 1208 and its steel structure door leaf to rise until the steel structure door leaf does not interfere with other components and stops, and finally the rotating drive motor 1214 drives the turntable bearing 1207 to rotate through the driving gear, thereby realizing the flip frame 1208 and the steel structure door leaf on it to rotate 180°, completing the rotation of the steel structure door leaf. As a specific arrangement for driving the rotating trapezoidal screw rod 1203 to rotate around its own axis, a rotating motor 1213 is arranged on the top of the flip stand 1201 , and the output end of the rotating motor 1213 is vertically arranged and fixedly connected to the top of the rotating trapezoidal screw rod 1203 .

[0050] In summary, the utility model of the automated welding production line equipment for civil air defense steel structure door leaves adopts a lifting and transporting trolley 9 to complete the transfer of steel structure door leaves on the production line, and adopts a cantilever welding robot device 11 to complete the main welding process of the steel structure door leaves. The layout of each workstation and the selection of components are reasonable, the production efficiency is high, the product quality is stable, the working conditions of the workers are good, the manual operation is reduced, the production cycle of the product can be shortened, and the risk of workers directly contacting welding equipment and high temperature environment can be reduced, thereby improving work safety.

Claims

1. Civil air defense steel structure door leaf automatic welding production line equipment, characterized by: It comprises a linear track, wherein the linear track is provided with a first welding station, a first turning station, a second welding station, a transition station, a third welding station, a second turning station and a discharge station in sequence along its length direction; The first welding station, the second welding station and the third welding station are each provided with a lifting and transporting trolley, two team support platforms and two cantilever welding robot devices; each of the lifting and transporting trolleys is slidably matched with the linear track; both sides of each lifting and transporting trolley are provided with the team support platforms whose bottoms are fixedly connected to the ground; and one of the cantilever welding robot devices is provided on the outer side of each team support platform; The first flipping station and the second flipping station are both provided with two lifting and flipping devices located on both sides of the linear track; The transition station and the unloading station are both provided with two team support platforms located on both sides of the linear track and with the bottoms fixedly connected to the ground.

2. The automatic welding production line equipment for civil air defense steel structure door leaf according to claim 1 is characterized in that: The first welding station is provided with a clamping mechanism.

3. The automatic welding production line equipment for civil air defense steel structure door leaf according to claim 2 is characterized in that: Each of the lifting and transporting trolleys comprises a trolley lower frame, a front axle and a rear axle are arranged at the bottom of the trolley lower frame, and a roller matching with the linear track is arranged at both ends of the front axle and the rear axle; A driven wheel is arranged in the middle of the front axle; a driving motor is arranged on the lower frame of the trolley, a driving wheel is arranged at the output end of the driving motor, and a belt is used to drive the driving wheel and the driven wheel; A worm gear lift is arranged at each of the four corners of the trolley lower frame, and a trolley upper frame is arranged on the top of the trolley lower frame. The lower end surface of the trolley upper frame is fixedly connected to the worm tops of the four worm gear lifts.

4. The automatic welding production line equipment for civil air defense steel structure door leaf according to claim 3 is characterized in that: A synchronous lifting device is arranged between the lower frame of the trolley and the upper frame of the trolley, and the synchronous lifting device includes a plurality of spiral bevel gear steering boxes, and the output ends of the plurality of spiral bevel gear steering boxes are fixedly connected to the worm gears in the four worm gear elevators through a plurality of connecting shafts.

5. The automatic welding production line equipment for civil air defense steel structure door leaf according to claim 4 is characterized in that: Each of the lifting and flipping devices comprises a flip stand arranged on one side of the linear track, and two slide rails and a rotating trapezoidal screw are vertically arranged on the flip stand; A lifting plate is arranged on the flip stand, and two sliders, a screw nut and a rotary drive motor are fixedly arranged on the back of the lifting plate; a turntable bearing is arranged on the front of the lifting plate, and an annular tooth is arranged on the inner ring of the turntable bearing; The two sliding blocks are respectively slidably matched with the two slide rails, the lead screw nut is threadably matched with the rotating trapezoidal lead screw, and the output end of the rotating drive motor passes through the lifting vertical plate and is provided with a driving gear meshing with the annular teeth; A turning frame is arranged on one side of the lifting vertical plate, one side of the turning frame is fixedly connected to the end face of the turntable bearing through a slewing plate, a horizontal notch for accommodating the steel structure door leaf is arranged on the turning frame, and a plurality of hydraulic cylinders are arranged on the turning frame, and the output end of each of the hydraulic cylinders is located in the horizontal notch and a clamping block is arranged thereon.

6. The automatic welding production line equipment for civil air defense steel structure door leaf according to claim 5 is characterized in that: A rotating motor is arranged on the top of the flip stand, and the output end of the rotating motor is arranged vertically and fixedly connected with the top of the rotating trapezoidal screw rod.

7. The automatic welding production line equipment for civil air defense steel structure door leaf according to claim 6 is characterized in that: The clamping mechanisms include two limit seats respectively located on both sides of the linear track, a bearing seat is vertically slidably arranged in each limit seat, a transmission screw is arranged on each limit seat, each transmission screw is driven to rotate by a servo motor, and a connecting block is arranged on each bearing seat that is threadedly matched with the transmission screw; a clamping roller shaft is rotatably arranged between the two bearing seats, and a supporting roller shaft is rotatably arranged below the clamping roller shaft.

8. The automatic welding production line equipment for civil air defense steel structure door leaf according to claim 7 is characterized in that: Each of the limiting seats is fixedly connected to the team support platform.

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