Welding system and welding method applied to angle steel tower cross yoke plate production

Abstract

The invention belongs to the technical field of intelligent manufacturing of angle steel towers, and relates to a welding system and a welding method applied to production of a cross yoke plate of an angle steel tower. In the welding system, a base is arranged on the side of an electric permanent magnet power assisting device, a fixed and movable position changing machine is installed on the base, a supporting frame is arranged on a rotating shaft of the fixed and movable position changing machine, four supporting bases are installed on the supporting frame in a sliding mode, a supporting plate is installed on the supporting bases, and a cylinder body of a corner clamping air cylinder and a positioning pin air cylinder are installed on the supporting plate. The positioning pin is embedded in the supporting plate, and a piston rod of the positioning pin cylinder is connected with the positioning pin. According to the welding method, the position of the movable positioner is adjusted, the positions of the supporting plates are adjusted so that the positioning pins can be matched with the positioning holes of the workpiece plate, the workpiece plate is magnetically attracted and grabbed through the electric permanent magnetic mechanism, the workpiece plate is placed on the supporting plates between the fixed positioner and the movable positioner through the operation plate, and the workpiece plate is fixed through the corner clamping air cylinder. The workpiece plate can be clamped and fixed, and the welding efficiency and the welding quality are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of intelligent manufacturing of angle steel towers, and particularly relates to a welding system and a welding method applied to cross-plate production of angle steel towers. BACKGROUND

[0002] The cross-plate is a key connecting component in the angle steel tower, and is used to connect the upper and lower sections of the tower body or different limb materials, and plays a role in load transmission and overall stability enhancement.

[0003] In traditional cross-plate welding manufacturing, three workpiece plates are first assembled and spliced into a cross-shaped structure of the cross-plate workpiece through an auxiliary tooling, then the cross-plate workpiece is temporarily fixed by welding support ribs between the workpiece plates, or the cross-plate workpiece is temporarily fixed by spot welding at the connection of the workpiece plates through riveting, and then the cross-plate workpiece is transferred to the next process for overall welding. This process is complex, reduces the welding efficiency, and in the overall welding process, diagonal support members are generally used to assist in supporting the workpiece plates, which cannot effectively fix the cross-plate workpiece as a whole, resulting in the technical problem of welding deformation of the cross-plate workpiece. SUMMARY

[0004] To solve the above technical problems, the application provides a welding system and a welding method applied to cross-plate production of angle steel towers. A welding system applied to cross-plate production of angle steel towers, a side of an electric permanent magnet power assisting device is provided with a base, a fixed positioner and a movable positioner are respectively installed and fixed on the upper surface of the base at both ends, a support frame is respectively arranged on the adjacent rotating shafts on the inner sides of the fixed positioner and the movable positioner, the support frame comprises a mouth-shaped outer frame and a cross-shaped support connected to the mouth-shaped outer frame at opposite angles, four support seats are slidably installed on the cross-shaped support, a support plate is installed on the support seat, a cylinder body of a corner clamping cylinder and a positioning pin cylinder are installed on the support plate, at least two groups of positioning pins are embedded in the support plate, and a piston rod of the positioning pin cylinder is connected to the positioning pins.

[0005] Preferably, the electric permanent magnet power assisting device comprises a support column, a first support is rotationally connected to the upper end of the support column, a lifting cylinder is installed on the side of the upper part of the first support, the top of the first support is in a U-shaped structure, a horizontal rotating shaft is fixedly arranged in the U-shaped structure, a swing frame is rotationally connected to the first support through the horizontal rotating shaft and is hingedly connected to the piston rod of the lifting cylinder at one end, the other end of the swing frame is hingedly connected to a second support, a third support comprises a vertical support column and a horizontal support column located at the middle part of the vertical support column, the upper end of the vertical support column is rotationally connected to the second support, an operating plate is installed on the outer end of the horizontal support column, and an electric permanent magnet mechanism is installed on the lower end of the vertical support column.

[0006] Preferably, the vertical support column lower end is installed with a first motor, the first motor rotating shaft extends horizontally away from the operation plate, a second motor is installed on the first motor rotating shaft, the second motor rotating shaft is vertically downward connected with the input rotating shaft of the speed reducer, and the output rotating shaft of the speed reducer is connected with the electric permanent magnet mechanism.

[0007] Preferably, the lower end of the stand is fixedly installed on the ground through anchor bolts, and the operation plate is symmetrically provided with handles on the two opposite sides.

[0008] Preferably, a pair of parallel first guide rails are arranged on the two side edges of the base in the length direction, the rack is arranged between the two first guide rails, a first sliding groove matched with the first guide rail is formed in the lower surface of the transverse moving seat, the first sliding groove is slidably connected with the first guide rail, the transverse moving motor is installed on the transverse moving seat, the rotating shaft of the transverse moving motor penetrates through the transverse moving seat and is connected with the gear, the gear is in meshing transmission connection with the rack, and the moving displacement machine is installed on the transverse moving seat.

[0009] Preferably, four pairs of bearing seats are arranged on the cross-shaped support, and the four lead screws are rotatably installed on the cross-shaped support through the four pairs of bearing seats.

[0010] Preferably, four groups of second guide rails are arranged on the cross-shaped support in the length direction, each group of second guide rails is two and parallel to each other, a second sliding groove matched with the second guide rail is formed in the support seat, the second sliding groove is slidably connected with the second guide rail, an internal thread hole matched with the lead screw is formed in the support seat, and the support seat is threadedly screwed with the lead screw through the internal thread hole.

[0011] Preferably, the air cylinder protection cover is installed on the support plate, and the air cylinder protection cover is arranged outside the periphery of the positioning pin air cylinder.

[0012] A welding method applied to the production of cross connecting plates of angle steel towers, which adopts the welding system applied to the production of cross connecting plates of angle steel towers and comprises the following steps: The distance between the support plates on the fixed displacement machine and the moving displacement machine is adjusted, so that the position of the support plates is matched with the first workpiece plate; The third support is moved to the area where the first workpiece plate is placed through the operation plate, the electric permanent magnet mechanism is moved downward to contact the first workpiece plate by starting the lifting air cylinder, the electric permanent magnet mechanism magnetically attracts and grabs the first workpiece plate, and the electric permanent magnet mechanism is moved upward by starting the lifting air cylinder. The first workpiece plate is moved between the fixed displacement machine and the moving displacement machine through the operation plate, the positioning pin is extended by starting the positioning pin air cylinder, the first workpiece plate is moved downward to align the positioning hole on the first workpiece plate with the positioning pin by starting the lifting air cylinder, the first workpiece plate is placed on the support plates, and the electric permanent magnet mechanism is reset; the corner clamping air cylinder on the support plates is started to fix the first workpiece plate. The fixed positioner and the movable positioner are started, the rotation of the support frame is controlled, two groups of support plates for fixing the second workpiece plate and the third workpiece plate are rotated to a horizontal state, the electric permanent magnet mechanism is controlled to sequentially grab the second workpiece plate and the third workpiece plate, and the second workpiece plate and the third workpiece plate are respectively placed on the two groups of support plates to be fixed, so that the positioning and clamping of each workpiece plate of the cross-connection plate workpiece are completed.

[0013] Preferably, according to the product parameters of the cross-connection plate workpiece, the movable positioner is controlled to move to a corresponding position.

[0014] The present application has the following beneficial effects: In the present application, a plurality of support plates are arranged to position, clamp and fix each workpiece plate, and after the fixing is completed, the welding posture of the workpiece plate can be adjusted through the positioners at both ends, so that each connection point of the workpiece plate can be welded, thereby improving the welding efficiency. In the present application, each workpiece plate is fixed by the corner clamping air cylinder, and this rigid fixing mode can reduce welding deformation and improve welding quality. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the present application, and do not constitute a limitation on the present application. In the drawings: Figure 1 It is a structure schematic view of the welding system of the embodiment one of the present application; Figure 2 It is a front view of the electric permanent magnet power-assisted device in Figure 1 Figure 3 It is a partial enlarged view of A in Figure 2 Figure 4 It is a structure schematic view of the positioner part in Figure 1 Figure 5 It is a front view of Figure 4 Figure 6 It is a right view of the fixed positioner in Figure 5 Figure 7 It is a partial enlarged view of B in Figure 6 Figure 8 It is a structure schematic view of the support seat and support plate part in Figure 6 Figure 9 It is a right view of the cross-connection plate workpiece of the embodiment two of the present application; Figure 10 It is a structure schematic view of the welding system of the embodiment three of the present application; ​​​​​​​In the diagram, 1 is the electro-permanent magnet assist device, 2 is the fixed positioner, 3 is the base, 4 is the mobile positioner, 5 is the transverse motor, 6 is the transverse seat, 7 is the second support, 8 is the third support, 9 is the control panel, 10 is the swing frame, 11 is the first support, 12 is the lifting cylinder, 13 is the column, 14 is the second motor, 15 is the reducer, 16 is the electro-permanent magnet mechanism, 17 is the cross-shaped workpiece, 18 is the first motor, 19 is the support frame, 20 is the handwheel, 21 is the support plate, 22 is the rack, 23 is the corner clamping cylinder, 24 is the lead screw, 25 is the support seat, 26 is the positioning pin, 27 is the cylinder protective cover, 28 is the positioning pin cylinder, 29 is the first workpiece plate, 30 is the second workpiece plate, 31 is the third workpiece plate, 32 is the first guide rail, 33 is the second guide rail, and 34 is the automatic welding robot. Detailed Implementation

[0016] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0017] Example 1:

[0018] like Figures 1-8 As shown, a welding system for the production of cross-shaped plates for angle steel towers includes an electro-permanent magnet assist device 1 and a clamping and fixing mechanism. The clamping and fixing mechanism includes a base 3 and a fixed positioner 2 and a movable positioner 4 installed at both ends of the base 3. The electro-permanent magnet assist device 1 is arranged on the side of the base 3.

[0019] The electro-permanent magnet assist device 1 includes a support column 13. The lower end of the support column 13 is fixedly installed on the ground by anchor bolts, etc. The upper end of the support column 13 is rotatably installed with a first bracket 11. The first bracket 11 is a fixedly connected three-section combined structure. The lower end of the lower section of the first bracket 11 is rotatably connected to the upper end of the support column 13. The right side of the middle section of the first bracket 11 is fixedly installed with a lifting cylinder 12 by a support member. The upper section of the first bracket 11 is a U-shaped structure. A rotating shaft is fixedly installed in the U-shaped structure. The right end of the swing frame 10 is rotatably connected to the upper section of the first bracket 11 by the rotating shaft. At the same time, the right end of the swing frame 10 is hinged to the piston rod of the lifting cylinder 12. The lifting cylinder 12 can control the swing frame 10 to swing up and down.

[0020] The left end of the swing frame 10 is hingedly connected with the second support 7, the second support 7 is in a Z-shaped structure as a whole, and the upper end of the second support 7 is hingedly connected with the left end of the swing frame 10. The third support 8 is in a T-shaped structure, including a vertical support column and a horizontal support column located at the middle of the vertical support column, the upper end of the vertical support column is rotationally connected with the lower end of the second support 7, and the outer end of the horizontal support column is fixedly installed with an operation plate 9, handles are arranged on the two outer sides of the operation plate 9, and an operator can pull the operation plate 9 to adjust the position of the third support 8 through the handles. The lower end of the vertical support column is fixedly installed with a first motor 18 through a connecting piece, the first motor 18 is located below the operation plate 9, and the rotating shaft of the first motor 18 extends horizontally away from the operation plate 9. A second motor 14 is fixedly installed on the rotating shaft of the first motor 18 through a connecting piece, the rotating shaft of the second motor 14 is fixedly connected with the input rotating shaft of a speed reducer 15 vertically downward, and the output rotating shaft of the speed reducer 15 is fixedly connected with an electric permanent magnet mechanism 16. The first motor 18 can control the electric permanent magnet mechanism 16 to swing forward and backward, the second motor 14 can control the electric permanent magnet mechanism 16 to swing left and right, and the angle of the electric permanent magnet mechanism 16 can be adjusted arbitrarily. When some workpiece plates in the workpiece 17 are loaded, some workpiece plates may fall into a vertical plate state, the orientation of the electric permanent magnet mechanism 16 can be adjusted through the first motor 18 and the second motor 14 to grasp workpiece plate materials in different placement states, and the workpiece plates can be adjusted to a horizontal state through the first motor 18 and the second motor 14 during loading.

[0021] The base 3 is a long strip plate, and the fixed positioner 2 is fixedly installed at the left end in the length direction of the base 3. A pair of parallel first guide rails 32 are arranged at the positions of the two side edges of the right half in the length direction of the base 3, and a rack 22 is fixedly arranged between the two first guide rails 32. A first sliding groove matched with the first guide rail 32 is formed in the lower surface of the transverse moving seat 6, so that the transverse moving seat 6 can move horizontally along the first guide rail 32 through cooperation of the first sliding groove and the first guide rail 32. The transverse moving motor 5 is fixedly installed on the transverse moving seat 6, the rotating shaft of the transverse moving motor 5 downwardly penetrates through the transverse moving seat 6 and is fixedly connected with a gear, the gear is in meshing transmission connection with the rack 22, and the transverse moving motor 5 can control the transverse moving seat 6 to move horizontally through the gear and the rack 22. The moving positioner 4 is fixedly installed on the transverse moving seat 6, and the moving positioner 4 is located on the inner side of the transverse moving motor 5.

[0022] Support frames 19 are fixedly mounted on the rotating shafts of the mobile positioner 4 and the fixed positioner 2, respectively. The rotating shafts of the mobile positioner 4 and the fixed positioner 2 are located adjacent to each other on the inner side. The mobile positioner 4 and the fixed positioner 2 can control the rotation of the support frames 19 through motors and rotating shafts. The grid-shaped support frame 19 includes a square-shaped outer frame and a cross-shaped bracket fixedly connected diagonally to the square-shaped outer frame. Four pairs of bearing seats are arranged around the center position on the cross-shaped bracket. Four lead screws 24 are rotatably mounted on the cross-shaped bracket through the four pairs of bearing seats. The four lead screws 24 are distributed in a cross shape on the support frame 19. The outer end of each lead screw 24 passes through the bearing seat and is fixedly connected to a handwheel 20. The rotation of the lead screw 24 can be controlled by operating the handwheel 20. Four sets of second guide rails 33 are arranged along the length of the cross-shaped bracket. Each set of second guide rails 33 consists of two parallel rails. The support base 25 has a second sliding groove that matches the second guide rail 33. Through the cooperation of the second sliding groove and the second guide rail 33, the four support bases 25 are slidably mounted on the cross-shaped bracket of the support frame 19. The support base 25 has an internal threaded hole that matches the lead screw 24. The support base 25 is threadedly connected to the lead screw 24 through the internal threaded hole. By rotating the lead screw 24, the support base 25 can be controlled to slide along the cross-shaped bracket. The support plate 21 is fixedly mounted on the support base 25, and the cylinder body of the corner clamping cylinder 23 is fixedly mounted on the support plate 21. Each support plate 21 is provided with two sets of positioning pins 26. Multiple sets of positioning pins 26 can also be provided according to the size parameters of the cross-shaped workpiece 17. The locating pin 26 is embedded in the support plate 21, and the locating pin cylinder 28 is fixedly installed on the support plate 21. The locating pin 26 is fixedly connected to the piston rod of the locating pin cylinder 28. Activating the locating pin cylinder 28 can cause the locating pin 26 to extend outward or retract inward. The cylinder protective cover 27 is fixedly installed on the support plate 21 and is located on the outer periphery of the locating pin cylinder 28. The cylinder protective cover 27 can protect the locating pin cylinder 28.

[0023] Example 2:

[0024] like Figure 9 As shown, a welding method for producing cross-shaped connecting plates for angle steel towers, using a welding system described in Example 1, includes the following steps: First, based on the product parameters of the cross-shaped workpiece 17, the mobile positioner 4 is moved to the corresponding position. The operator adjusts the distance between a set of support plates 21 on the fixed positioner 2 and the mobile positioner 4 by rotating the handwheel 20, so that the position of the support plate 21 matches the first workpiece plate 29. Specifically, the first workpiece plate 29 is provided with positioning holes. By rotating the handwheel 20 to adjust the position of the support plate 21, the position of the positioning pin 26 on the support plate 21 corresponds to the positioning hole on the first workpiece plate 29. The positioning pin cylinder 28 is then activated to extend the positioning pin 26 outward.

[0025] The operator moves the third support 8 to the placement area of the first workpiece plate 29 through the handheld operation panel 9, and during the movement, the orientation of the electro-permanent magnetic mechanism 16 can be adjusted by starting the first motor 18 and the second motor 14 according to the placement posture of the first workpiece plate 29. Generally, the workpiece plate is placed horizontally, and in special cases, the orientation of the electro-permanent magnetic mechanism 16 needs to be adjusted to grab the workpiece plate.

[0026] After the third support 8 is moved to the position, the lifting cylinder 12 is started to move the electro-permanent magnetic mechanism 16 downward to contact the first workpiece plate 29, and the electro-permanent magnetic mechanism 16 magnetically attracts and grabs the first workpiece plate 29. After the grabbing is completed, the lifting cylinder 12 is started to control the electro-permanent magnetic mechanism 16 to move upward to the limiting position. The operator moves the first workpiece plate 29 between the fixed positioner 2 and the moving positioner 4 through the handheld operation panel 9. The lifting cylinder 12 is started to move the electro-permanent magnetic mechanism 16 downward, so that the positioning hole on the first workpiece plate 29 is aligned with the positioning pin 26, and the first workpiece plate 29 is placed on the support plate 21 between the fixed positioner 2 and the moving positioner 4. Then, the electro-permanent magnetic mechanism 16 of the electro-permanent magnetic assisting device 1 is reset. The loading height of the first workpiece plate 29 corresponds to the height of the support plate 21.

[0027] The operator starts the corner clamping cylinder 23 on the support plate 21 to fix the first workpiece plate 29, and the loading and fixing of the first workpiece plate 29 are completed. Then, the fixed positioner 2 and the moving positioner 4 are started to control the support frame 19 to rotate, and the support plate 21 for fixing and placing the second workpiece plate 30 and the third workpiece plate 31 is rotated to the horizontal state. The above loading steps are repeated to place and fix the second workpiece plate 30 and the third workpiece plate 31, and the positioning, clamping and fixing of each workpiece plate of the cross-plate workpiece 17 are completed.

[0028] After the positioning, clamping and fixing of each workpiece plate are completed and no error is found, the first workpiece plate 29, the second workpiece plate 30 and the third workpiece plate 31 are welded. The intermittent welding method can be used to intermittently weld one side of the connection between the workpiece plates, and after rotating, the other side of the connection between the workpiece plates which has not been welded is intermittently welded. Finally, full welding is performed respectively. The intermittent welding method can prevent the plate from bending around the weld due to uneven heating on both sides of the weld. The intermittent welding process is a prior art.

[0029] In the second embodiment of the present application, the first workpiece plate 29, the second workpiece plate 30 and the third workpiece plate 31 are effectively fixed, and the direction and welding angle can be adjusted, so that various welding processes can be used for the welding of the cross-plate workpiece 17.

[0030] Embodiment three:

[0031] The third embodiment of the present application is a further technical improvement of the welding system in the first embodiment, as shown in the drawings Figure 10 An automatic welding robot 34 is additionally arranged on the side of the base 3 away from the electric permanent magnetic assisting device 1, and the automatic welding robot 34 can automatically weld each workpiece plate after the fixing of each workpiece plate according to the parameters of the cross-plate workpiece 17, which is more efficient than manual welding.

[0032] In addition, a gas suspension assisting system is additionally arranged at the lifting cylinder 12, and the lifting cylinder 12 is communicated with the gas suspension assisting system, so that the swing frame 10 is in a balanced floating state, when the operator applies a small external force (pushing up or pulling down), the gas suspension assisting system can sense the load change and automatically adjust the air pressure to maintain the balanced state, so that the load "follows" the smooth movement of the operator. In the balanced state, the operator only needs to apply a small force to lift or move the load through the swing frame 10, which reduces the labor intensity of the operator. The gas suspension assisting system is a product, also known as "a pneumatic system applied to a suspended assisting mechanical hand".

[0033] In the embodiments of the present application, the technical features not described in detail are all prior art or conventional technical means, which will not be described here.

[0034] Finally, it should be noted that: the above embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit it, the protection scope of the present application is not limited to this. Those skilled in the art should understand that: any person skilled in the art can modify or easily think of changes to the technical solutions recorded in the above embodiments within the technical range disclosed by the present application, or make equivalent replacement to some technical features; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and all should be covered in the protection scope of the present application.

Claims

1. A welding system for the production of angle steel tower cross plates, comprising an electro-permanent magnet assist device (1) for loading workpiece plates, characterized in that, A base (3) is provided on the side of the electro-permanent magnet assist device (1). A fixed positioner (2) and a mobile positioner (4) are respectively installed on both ends of the upper surface of the base (3). Support frames (19) are respectively provided on the adjacent rotating shafts inside the fixed positioner (2) and the mobile positioner (4). The support frame (19) includes a U-shaped outer frame and a cross-shaped bracket diagonally connected to the U-shaped outer frame. Four support seats (25) are slidably installed on the cross-shaped bracket. The support plate (21) is installed on the support seat (25). The cylinder body of the corner clamping cylinder (23) and the positioning pin cylinder (28) are installed on the support plate (21). At least two sets of positioning pins (26) are embedded in the support plate (21). The piston rod of the positioning pin cylinder (28) is connected to the positioning pin (26).

2. The welding system for producing cross-shaped connecting plates for angle steel towers according to claim 1, characterized in that, The electro-permanent magnet assist device (1) includes a support column (13), the lower end of the first bracket (11) is rotatably connected to the upper end of the support column (13), the lifting cylinder (12) is installed on the upper side of the first bracket (11), the top of the first bracket (11) is a U-shaped structure, a horizontal rotating shaft is fixedly installed in the U-shaped structure, one end of the swing frame (10) is rotatably connected to the first bracket (11) through the horizontal rotating shaft, and is hinged to the piston rod of the lifting cylinder (12), the other end of the swing frame (10) is hinged to the second bracket (7), the third bracket (8) includes a vertical support column and a horizontal support column located in the middle of the vertical support column, the upper end of the vertical support column is rotatably connected to the second bracket (7), the outer end of the horizontal support column is installed with an operating plate (9), and the lower end of the vertical support column is installed with an electro-permanent magnet mechanism (16).

3. The welding system for producing cross-shaped connecting plates for angle steel towers according to claim 2, characterized in that, The first motor (18) is installed at the lower end of the vertical support column. The rotation axis of the first motor (18) extends horizontally away from the operating plate (9). The second motor (14) is installed on the rotation axis of the first motor (18). The rotation axis of the second motor (14) is vertically downward connected to the input shaft of the reducer (15). The output shaft of the reducer (15) is connected to the electro-permanent magnet mechanism (16).

4. The welding system for producing cross-shaped connecting plates for angle steel towers according to claim 3, characterized in that, The lower end of the column (13) is fixed to the ground by anchor bolts, and the operating panel (9) is symmetrically provided with handles on opposite sides.

5. The welding system for producing cross-shaped connecting plates for angle steel towers according to claim 1, characterized in that, A pair of parallel first guide rails (32) are provided on both sides of the base (3) along the length direction. A rack (22) is set between the two first guide rails (32). A first sliding groove matching the first guide rail (32) is opened on the lower surface of the transverse seat (6). The first sliding groove is slidably connected to the first guide rail (32). The transverse motor (5) is installed on the transverse seat (6). The rotating shaft of the transverse motor (5) passes downward through the transverse seat (6) connecting gear. The gear meshes with the rack (22) for transmission. The moving positioner (4) is installed on the transverse seat (6).

6. The welding system for producing cross-shaped connecting plates for angle steel towers according to claim 5, characterized in that, Four pairs of bearing seats are provided on the cross-shaped bracket. Four lead screws (24) are rotatably mounted on the cross-shaped bracket through the four pairs of bearing seats. The outer end of the lead screw (24) passes through the bearing seat and is fixedly connected to the handwheel (20).

7. The welding system for producing cross-shaped connecting plates for angle steel towers according to claim 6, characterized in that, Four sets of second guide rails (33) are provided along the length of the cross-shaped bracket. Each set of second guide rails (33) consists of two rails that are parallel to each other. The support base (25) has a second sliding groove that matches the second guide rail (33). The second sliding groove is slidably connected to the second guide rail (33). The support base (25) has an internal threaded hole that matches the lead screw (24). The support base (25) is threadedly connected to the lead screw (24) through the internal threaded hole.

8. The welding system for producing cross-shaped connecting plates for angle steel towers according to claim 1, characterized in that, The cylinder guard (27) is mounted on the support plate (21) and is located on the outer periphery of the positioning pin cylinder (28).

9. A welding method for producing cross-shaped connecting plates for angle steel towers, characterized in that, The welding system described in claim 2, applied to the production of cross-shaped connecting plates for angle steel towers, includes the following steps: Adjust the spacing of a set of support plates (21) on the fixed positioner (2) and the mobile positioner (4) so ​​that the position of the set of support plates (21) matches the first workpiece plate (29); The third support (8) is moved to the area where the first workpiece plate (29) is placed by the operation panel (9), and the lifting cylinder (12) is activated to make the electro-permanent magnet mechanism (16) move downward to contact the first workpiece plate (29). The electro-permanent magnet mechanism (16) magnetically grabs the first workpiece plate (29). The lifting cylinder (12) is activated to control the electro-permanent magnet mechanism (16) to move upward. The first workpiece plate (29) is moved between the fixed positioner (2) and the moving positioner (4) by the operation panel (9). The positioning pin cylinder (28) is activated to extend the positioning pin (26). The lifting cylinder (12) is activated to move the electro-permanent magnet mechanism (16) downward so that the positioning hole on the first workpiece plate (29) is aligned with the positioning pin (26). The first workpiece plate (29) is placed on a set of support plates (21), and the electro-permanent magnet mechanism (16) is reset. The corner clamping cylinder (23) on the set of support plates (21) is activated to fix the first workpiece plate (29). Start the fixed positioner (2) and the mobile positioner (4), control the support frame (19) to rotate, and rotate the two sets of support plates (21) used to fix the second workpiece plate (30) and the third workpiece plate (31) to a horizontal state. Control the electro-permanent magnet mechanism (16) to grab the second workpiece plate (30) and the third workpiece plate (31) in sequence, and place the second workpiece plate (30) and the third workpiece plate (31) on the two sets of support plates (21) respectively to fix them, thus completing the positioning, clamping and fixing of each workpiece plate of the cross-shaped plate workpiece (17).

10. A welding method for producing cross-shaped connecting plates for angle steel towers according to claim 9, characterized in that, Based on the product parameters of the cross-shaped workpiece (17), control the moving positioner (4) to move to the corresponding position.

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