Manipulator welding clamp for steel structure machining

Abstract

The invention discloses a mechanical arm welding clamp for steel structure machining. Relates to the technical field of manipulator welding fixtures, and comprises workbenches, rotary tables are mounted on both sides of the top surface of the workbenches, rotating shafts are transversely and rotatably connected to the upper ends of the two workbenches, clamping assemblies are arranged at the upper ends of the workbenches, and a moving transmission assembly and a welding assembly are arranged at the rear ends of the workbenches; through cooperation of the hand wheel and the positioning screw rod, the two-way lead screw can be locked conveniently, and therefore the situation that a workpiece is too heavy and cannot be clamped is avoided; through cooperation of a jacking plate and a jacking air cylinder, a servo motor and a driving gear can be conveniently controlled to ascend and descend, then movement of a moving box and rotation of a mechanical arm are controlled, and therefore accurate positioning is facilitated; through cooperation of the first welding gun and the second welding gun, the mechanical arm can make continuous contact with a workpiece for welding or spot welding, so that the welding diversity is improved, and the welding modes of different positions of the workpiece are met; the device meets the requirement that different positions of a workpiece need different welding modes, and the welding efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of manipulator welding fixtures, and in particular to a manipulator welding fixture for steel structure processing. Background Art

[0002] Steel refers to an iron-carbon alloy with a carbon content of 0.02% to 2.11% by mass. Steel plays an important role in human production and life because of its high strength, light weight, good overall stiffness and excellent deformation resistance. After processing and forming, steel can be assembled together by welding, bolting or riveting to produce a steel structure that meets actual production needs. Existing steel structure processing welding fixtures generally clamp the steel structure workpiece with a workbench and a fixture, and then the workers weld where welding is required. However, in front of some larger steel structure workpieces, workers cannot weld at a higher position, and when welding on one side of the workpiece is completed, the workpiece needs to be turned over, so the welding volume is huge, and the workers' welding efficiency is not high. Therefore, the above problems need to be improved. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a manipulator welding fixture for steel structure processing.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a robot welding fixture for steel structure processing, comprising a workbench, turntables are installed on both sides of the top surface of the workbench, the upper ends of the two turntables are connected with rotating shafts for transverse rotation, a driving motor is installed on the outer side surface of one side of the turntable, the output shaft of the driving motor is connected to the outer end of the rotating shaft on one side, a clamping assembly is provided at the upper end of the workbench, and a moving transmission assembly and a welding assembly are provided at the rear end of the workbench.

[0005] Preferably, the clamping assembly includes an L-shaped supporting seat arranged on both sides of the upper end of the workbench, the L-shaped supporting seat is respectively installed on the proximal ends of the rotating shafts at both ends, and a lower supporting plate is horizontally installed on the inner bottom surface of the L-shaped supporting seat, and a vertical plate is fixedly connected to the top surface of the lower supporting plate, and positioning plates are provided at the distal ends of the vertical plates at both ends, and the vertical plates are fixedly connected to the positioning plates, the positioning plates are installed on the inner end surfaces of the L-shaped supporting seat by hexagon socket bolts, and an upper supporting plate is horizontally provided on the upper end of the positioning plate, and the upper supporting plate is fixedly connected to the vertical plate and the positioning plate.

[0006] Preferably, mounting plates are provided at the proximal ends of the upper supporting plates at both ends, the mounting plates are fixedly connected to the top surface of the upper supporting plate, and the mounting plates and the upper supporting plate are both provided with internal threaded holes, a positioning screw is threadedly connected inside the internal threaded holes, a sliding mouth is provided at the upper end of the positioning screw, a hand rod is provided in the sliding mouth, the hand rod is placed at the upper end of the upper supporting plate, and a pressure block is installed at the lower end of the positioning screw, the pressure block is placed at the lower end of the upper supporting plate, and a positioning block is provided directly below the pressure block, and the positioning block is installed on the top surface of the lower supporting plate.

[0007] Preferably, the mobile transmission assembly includes connecting seats arranged on both sides of the rear end of the workbench, a slide rail is transversely fixed between the lower ends of the two connecting seats, and a guide screw is transversely fixed between the upper ends of the two connecting seats, a mobile box is provided at the rear end of the workbench, a guide groove matching the slide rail is opened in the middle of the bottom surface of the mobile box, and a driven spur gear is rotatably connected inside the mobile box, the driven spur gear is threadedly connected to the guide screw, and the guide screw passes through the mobile box.

[0008] Preferably, a driving gear is provided inside the moving box, one side of the driving gear is meshed with a driven spur gear for transmission, and the driving gear is connected to the output shaft of a servo motor, the servo motor is installed on a lifting plate, lifting cylinders are installed at both ends of the bottom surface of the lifting plate, the lifting cylinder is installed in the moving box, and a driven bevel gear is rotatably connected to the middle part of the top surface of the moving box, the driven bevel gear is meshed with the other side of the driving gear for transmission, and a shell is installed on the outside of the driven bevel gear.

[0009] Preferably, one side of the driving gear is a spur gear, and the other side of the driving gear is a bevel gear.

[0010] Preferably, the welding assembly includes a base arranged at the rear end of the workbench, the base is installed on the top surface of the shell, and a mechanical arm is installed on the top surface of the base, a rotating head is provided at the upper end of the mechanical arm, the rotating head is rotatably connected to the mechanical arm, and a first stepper motor is installed at one end of the rotating head, the output shaft of the first stepper motor passes through the rotating head, and the output shaft of the first stepper motor is fixedly connected to a connecting plate, a first welding gun is installed at one end of the bottom surface of the connecting plate, and an electric push rod is installed at the other end of the bottom surface of the connecting plate, and the output shaft of the electric push rod is connected to the second welding gun.

[0011] Preferably, a fixed seat is installed on the outer side of the lower end of the rotating head, and a driving roller and a driven roller are rotatably connected inside the fixed seat. A second stepper motor is connected to one side of the driving roller, and the second stepper motor is installed on the outer side of the fixed seat. A welding wire is abutted between the driving roller and the driven roller, one end of the welding wire is placed at the lower end of the rotating head, and the other end of the welding wire is placed in a winding reel, and the winding reel is rotatably connected to one side of the robotic arm.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention facilitates the control of the lifting and lowering of the pressure block through the cooperation of the hand lever and the positioning screw, thereby fixing the workpiece for subsequent processing of the workpiece; through the cooperation of the lifting plate and the lifting cylinder, it is convenient to control the rise and fall of the servo motor and the driving gear, thereby controlling the movement of the moving box and the rotation of the mechanical arm, thereby facilitating precise positioning; through the cooperation of the first welding gun and the second welding gun, it is convenient for the mechanical arm to continuously contact the workpiece for welding or spot welding, thereby improving the diversity of welding, thereby meeting the welding methods of different positions of the workpiece; through the cooperation of the driving roller and the driven roller, it is convenient to supply the welding wire during welding, thereby improving the welding efficiency; the device meets the needs of different welding methods for different positions of the workpiece, thereby improving the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the overall back three-dimensional structure of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the mobile transmission assembly and the welding assembly of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the mobile transmission assembly of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the moving box and the driven bevel gear of the present invention; Figure 6 It is a schematic diagram of the internal cross-section of the moving box of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the welding assembly of the present invention; Figure 8 It is a bottom-up three-dimensional structural schematic diagram of a welding assembly of the present invention; Fig. 9 It is a rear perspective structural schematic diagram of a welding assembly of the present invention; Fig.10 For the present invention Figure 1 A schematic diagram of the enlarged structure of the middle A part; Fig.11 For the present invention Figure 8 Schematic diagram of the enlarged structure of part B in the middle.

[0014] The serial numbers in the figure are: 1, workbench; 2, turntable; 3, rotating shaft; 4, driving motor; 5, L-shaped supporting seat; 6, lower supporting plate; 7, vertical plate; 8, positioning plate; 9, upper supporting plate; 10, mounting plate; 11, positioning screw; 12, hand lever; 13, pressure block; 14, positioning block; 15, connecting seat; 16, slide rail; 17, guide screw; 18, moving box; 19, driven spur gear; 20, driving gear; 2 1. Servo motor; 22. Lifting plate; 23. Lifting cylinder; 24. Driven bevel gear; 25. Housing; 26. Base; 27. Robotic arm; 28. Rotating head; 29. ​​First stepper motor; 30. Connecting plate; 31. First welding gun; 32. Electric push rod; 33. Second welding gun; 34. Fixed seat; 35. Driving roller; 36. Driven roller; 37. Second stepper motor; 38. Welding wire; 39. Reel. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0016] Example 1: See Figure 1-11A manipulator welding fixture for steel structure processing in the present invention comprises a workbench 1, through which a turntable 2 is conveniently installed; turntables 2 are installed on both sides of the top surface of the workbench 1, through which a rotating shaft 3 is conveniently installed; the upper ends of the two turntables 2 are connected with a rotating shaft 3 for horizontal rotation, and the rotating shaft 3 is conveniently connected to an L-shaped supporting seat 5; a driving motor 4 is installed on the outer side of one side of the turntable 2, and the driving motor 4 is convenient for controlling the rotation of the rotating shaft 3; the output shaft of the driving motor 4 is connected to the outer end of the rotating shaft 3 on one side, and a clamping component is provided on the upper end of the workbench 1, and the workbench 1 is provided with a mobile transmission assembly and a welding assembly at the rear end; the clamping assembly includes an L-shaped support seat 5 provided on both sides of the upper end of the workbench 1, through which the lower support plate 6 is conveniently installed; the L-shaped support seat 5 is respectively installed on the proximal ends of the rotating shafts 3 at both ends, and the lower support plate 6 is horizontally installed on the inner bottom surface of the L-shaped support seat 5, through which the vertical plate 7 is conveniently installed; the top surface of the lower support plate 6 is fixedly connected with the vertical plate 7, through which the upper support plate 9 is conveniently installed; the front and rear ends of the vertical plates 7 at both ends are provided with positioning plates 8, through which the positioning plates 8 are convenient for positioning the vertical plates 7 and the upper support plate Plate 9; and the vertical plate 7 is fixedly connected to the positioning plate 8, the positioning plate 8 is installed on the inner end surface of the L-shaped support seat 5 by means of a hexagon socket bolt, and an upper support plate 9 is horizontally provided at the upper end of the positioning plate 8, and the upper support plate 9 is conveniently fixed to the mounting plate 10; the upper support plate 9 is fixedly connected to the vertical plate 7 and the positioning plate 8; a mounting plate 10 is provided at the proximal end of the upper support plates 9 at both ends, and the positioning screw 11 is conveniently controlled to be raised and lowered by the mounting plate 10; the mounting plate 10 is fixedly connected to the top surface of the upper support plate 9, and the mounting plate 10 and the upper support plate 9 are both provided with internal threaded holes, and the internal threaded holes are threadedly connected with A positioning screw 11 is used to control the lifting and lowering of a pressure block 13; a sliding opening is provided at the upper end of the positioning screw 11, and a hand lever 12 is provided in the sliding opening, and the rotation of the positioning screw 11 is controlled by the hand lever 12; the hand lever 12 is placed at the upper end of the upper support plate 9, and a pressure block 13 is installed at the lower end of the positioning screw 11, and the workpiece is clamped by the pressure block 13; the pressure block 13 is placed at the lower end of the upper support plate 9, and a positioning block 14 is provided directly below the pressure block 13, and the workpiece is clamped and positioned by the positioning block 14; the positioning block 14 is installed on the top surface of the lower support plate 6.

[0017] Embodiment 2: The technical solution is basically the same as that of Embodiment 1, except that Figure 3 , Figure 4 , Figure 6As shown, the mobile transmission assembly includes a connecting seat 15 arranged on both sides of the rear end of the workbench 1, which is convenient for connecting the slide rail 16 through the connecting seat 15; a slide rail 16 is transversely fixed between the lower ends of the two connecting seats 15, and the slide rail 16 is convenient for guiding the movement of the mobile box 18; and a guide screw 17 is transversely fixed between the upper ends of the two connecting seats 15, and the movement of the mobile box 18 is convenient for controlling the movement of the guide screw 17; a mobile box 18 is provided at the rear end of the workbench 1, and the mobile box 18 is convenient for installing the mobile transmission assembly; a guide groove matching the slide rail 16 is opened in the middle of the bottom surface of the mobile box 18, and a driven spur gear 19 is rotatably connected inside the mobile box 18, and the movement of the mobile box 18 is convenient for controlling the movement of the driven spur gear 19; the driven spur gear 19 is threadedly connected to the guide screw 17, and the guide screw 17 passes through the mobile box 18; a driving gear 20 is provided inside the mobile box 18, and the driving gear 20 is convenient for controlling the movement of the driven spur gear 19 The movable spur gear 19 rotates; one side of the driving gear 20 meshes with the driven spur gear 19 for transmission, and the driving gear 20 is connected to the output shaft of the servo motor 21, and the servo motor 21 is used to control the rotation of the driving gear 20; the servo motor 21 is installed on the lifting plate 22, and the lifting plate 22 is used to control the lifting of the servo motor 21; lifting cylinders 23 are installed at both ends of the bottom surface of the lifting plate 22, and the lifting of the lifting plate 22 is controlled by the lifting cylinder 23; the lifting cylinder 23 is installed in the moving box 18, and the middle part of the top surface of the moving box 18 is rotatably connected with a driven bevel gear 24, and the driven bevel gear 24 is used to control the rotation of the base 26; the driven bevel gear 24 meshes with the other side of the driving gear 20 for transmission, and a shell 25 is installed on the outside of the driven bevel gear 24, and the base 26 is installed through the shell 25; one side of the driving gear 20 is a spur gear, and the other side of the driving gear 20 is a bevel gear.

[0018] Embodiment 3: The technical solution is basically the same as that of Embodiment 1, except that Figure 7 , Figure 8 , Fig. 9As shown, the welding assembly includes a base 26 arranged at the rear end of the workbench 1, through which a mechanical arm 27 is conveniently installed; the base 26 is installed on the top surface of the shell 25, and a mechanical arm 27 is installed on the top surface of the base 26, through which the mechanical arm 27 is convenient to control the movement of the rotating head 28; a rotating head 28 is provided at the upper end of the mechanical arm 27, through which the welding assembly is convenient to install; the rotating head 28 is rotatably connected to the mechanical arm 27, and a first stepper motor 29 is installed at one end of the rotating head 28, through which the first stepper motor 29 is convenient to control the rotation of the connecting plate 30; the output shaft of the first stepper motor 29 passes through the rotating head 28, and the output shaft of the first stepper motor 29 is fixedly connected to the connecting plate 30, through which the first welding gun 31 and the second welding gun 33 are convenient to install; a first welding gun 31 is installed at one end of the bottom surface of the connecting plate 30, through which the first welding gun 31 is convenient to contact the workpiece for continuous welding; and an electric push rod 32 is installed at the other end of the bottom surface of the connecting plate 30, The electric push rod 32 is convenient for controlling the movement of the second welding gun 33; the output shaft of the electric push rod 32 is connected to the second welding gun 33, and spot welding is convenient through the second welding gun 33; a fixed seat 34 is installed on the outer side of the lower end of the rotating head 28, and the driving roller 35 and the driven roller 36 are conveniently installed through the fixed seat 34; the driving roller 35 and the driven roller 36 are rotatably connected inside the fixed seat 34, and the movement of the welding wire 38 is conveniently controlled through the driving roller 35 and the driven roller 36; a second stepper motor 37 is connected to one side of the driving roller 35, and the rotation of the driving roller 35 is conveniently controlled through the second stepper motor 37; the second stepper motor 37 is installed on the outer side of the fixed seat 34, and the welding wire 38 is abutted between the driving roller 35 and the driven roller 36, and welding is convenient through the welding wire 38; one end of the welding wire 38 is placed at the lower end of the rotating head 28, and the other end of the welding wire 38 is placed in the winding reel 39, and the welding wire 38 is conveniently wound through the winding reel 39; the winding reel 39 is rotatably connected to one side of the mechanical arm 27.

[0019] Working principle: In this embodiment, the present invention also proposes a method for using a manipulator welding fixture for steel structure processing, comprising the following steps: Step 1: First, connect all electrical equipment with wires and power on, then place the workpiece on the upper ends of the positioning blocks 14 at both ends, and then rotate the hand lever 12. The hand lever 12 rotates to control the rotation of the positioning screw 11. The positioning screw 11 is threadedly connected with the mounting plate 10 and the upper support plate 9. When the hand lever 12 rotates, the positioning screw 11 is controlled to rise and fall. A pressure block 13 is installed at the lower end of the positioning screw 11 to control the lifting and lowering of the pressure block 13. When the pressure block 13 descends, the workpiece is pressed down from the upper end, and the positioning block 14 cooperates to clamp the workpiece. Step 2: After the workpiece is clamped, the servo motor 21 is started, and the driving gear 20 is controlled to rotate by the servo motor 21, and then the driving gear 20 is meshed with the driven spur gear 19 for transmission, and the driven spur gear 19 is threadedly connected with the lead screw 17. When the driving gear 20 rotates, the driven spur gear 19 is controlled to rotate, and then the driven spur gear 19 is controlled to move in the lead screw 17, and the driven spur gear 19 is connected to the moving box 18 by rotation, so as to control the moving box 18 to move in the slide rail 16, and then the robot arm 27 is controlled to move to the position where the workpiece needs to be welded; Step three, when the robot arm 27 moves to the position where the workpiece needs to be welded, the servo motor 21 is stopped, the lifting cylinder 23 is started, and the lifting plate 22 is controlled to rise by the lifting cylinder 23, thereby controlling the servo motor 21 and the driving gear 20 to rise, thereby making the driving gear 20 mesh with the driven bevel gear 24 for transmission, and then the lifting cylinder 23 is stopped, the servo motor 21 is started, and the driving gear 20 is controlled to rotate by the servo motor 21, and the driving gear 20 is meshed with the driven bevel gear 24 for transmission, thereby controlling the driven bevel gear 24 to rotate, and then controlling the robot arm 27 to rotate, and when the rotation angle of the robot arm 27 is appropriate, the servo motor 21 is stopped; Step 4. After the rotation angle of the robot arm 27 is determined, the robot arm 27 is started to swing, so as to control the rotating head 28 to move to the welding position of the workpiece. When long-term contact welding or electric welding is required, the first stepper motor 29 is started. The first stepper motor 29 rotates to control the first welding gun 31 and the second welding gun 33 to rotate, thereby changing the welding method. During welding, the second stepper motor 37 is started to control the driving roller 35 to rotate, thereby clamping the welding wire 38 to move toward the welding point, thereby completing the welding. When the workpiece needs to be turned over for welding, the driving motor 4 is started, and the driving motor 4 is connected to the one side shaft 3 to control the rotation of the one side shaft 3, thereby controlling the rotation of the L-shaped supporting seat 5, thereby controlling the lower supporting plate 6 to rotate from the lower end to the upper end, and controlling the upper supporting plate 9 to rotate from the upper end to the lower end, thereby realizing the flipping of the workpiece, and then completing the subsequent welding; when the welding is completed, all electrical equipment is powered off.

[0020] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A robot welding fixture for steel structure processing, comprising a workbench (1), characterized in that: Turntables (2) are installed on both sides of the top surface of the workbench (1); the upper ends of the two turntables (2) are connected to rotating shafts (3) in a transverse manner; a driving motor (4) is installed on the outer side surface of one of the turntables (2); the output shaft of the driving motor (4) is connected to the outer end of the rotating shaft (3) on one side; a clamping assembly is provided at the upper end of the workbench (1), and a moving transmission assembly and a welding assembly are provided at the rear end of the workbench (1).

2. The robot welding fixture for steel structure processing according to claim 1 is characterized in that: The clamping assembly comprises an L-shaped supporting seat (5) arranged on both sides of the upper end of the workbench (1), the L-shaped supporting seat (5) being respectively mounted on the proximal ends of the rotating shafts (3) at both ends, and a lower supporting plate (6) being horizontally mounted on the inner bottom surface of the L-shaped supporting seat (5), and a vertical plate (7) being fixedly connected to the top surface of the lower supporting plate (6), and positioning plates (8) being provided at the distal ends of the vertical plates (7) at both ends, and the vertical plates (7) being fixedly connected to the positioning plates (8), and the positioning plates (8) being mounted on the inner end surface of the L-shaped supporting seat (5) by means of hexagon socket bolts, and an upper supporting plate (9) being horizontally mounted on the upper end of the positioning plate (8), and the upper supporting plate (9) being fixedly connected to the vertical plate (7) and the positioning plate (8).

3. The robot welding fixture for steel structure processing according to claim 2 is characterized in that: The upper supporting plates (9) at both ends are provided with mounting plates (10) at the proximal ends. The mounting plates (10) are fixedly connected to the top surface of the upper supporting plate (9). The mounting plates (10) and the upper supporting plate (9) are both provided with internal threaded holes. A positioning screw (11) is threadedly connected inside the internal threaded holes. A sliding opening is provided at the upper end of the positioning screw (11). A hand lever (12) is provided in the sliding opening. The hand lever (12) is placed at the upper end of the upper supporting plate (9). A pressure block (13) is installed at the lower end of the positioning screw (11). The pressure block (13) is placed at the lower end of the upper supporting plate (9). A positioning block (14) is provided directly below the pressure block (13). The positioning block (14) is installed on the top surface of the lower supporting plate (6).

4. The robot welding fixture for steel structure processing according to claim 1 is characterized in that: The mobile transmission assembly comprises a connecting seat (15) arranged on both sides of the rear end of the workbench (1), a slide rail (16) is transversely fixedly connected between the lower ends of the two connecting seats (15), and a guide screw (17) is transversely fixedly connected between the upper ends of the two connecting seats (15). A moving box (18) is provided at the rear end of the workbench (1), a guide groove matching the slide rail (16) is opened in the middle of the bottom surface of the moving box (18), and a driven spur gear (19) is rotatably connected inside the moving box (18), the driven spur gear (19) is threadedly connected to the guide screw (17), and the guide screw (17) passes through the moving box (18).

5. The robot welding fixture for steel structure processing according to claim 4 is characterized in that: A driving gear (20) is provided inside the moving box (18), one side of the driving gear (20) is meshed with a driven spur gear (19) for transmission, and the driving gear (20) is connected to the output shaft of a servo motor (21), the servo motor (21) is mounted on a lifting plate (22), both ends of the bottom surface of the lifting plate (22) are mounted with lifting cylinders (23), the lifting cylinders (23) are mounted in the moving box (18), and a driven bevel gear (24) is rotatably connected to the middle of the top surface of the moving box (18), the driven bevel gear (24) is meshed with the other side of the driving gear (20) for transmission, and a housing (25) is mounted on the outside of the driven bevel gear (24).

6. The robot welding fixture for steel structure processing according to claim 5 is characterized in that: One side of the driving gear (20) is a spur gear, and the other side of the driving gear (20) is a bevel gear.

7. The robot welding fixture for steel structure processing according to claim 1 is characterized in that: The welding assembly comprises a base (26) arranged at the rear end of the workbench (1), the base (26) being mounted on the top surface of the housing (25), and a mechanical arm (27) being mounted on the top surface of the base (26), a rotating head (28) being arranged at the upper end of the mechanical arm (27), the rotating head (28) being rotatably connected to the mechanical arm (27), and a first stepper motor (29) being mounted at one end of the rotating head (28), an output shaft of the first stepper motor (29) passing through the rotating head (28), and a connecting plate (30) being fixedly connected to the output shaft of the first stepper motor (29), a first welding gun (31) being mounted at one end of the bottom surface of the connecting plate (30), and an electric push rod (32) being mounted at the other end of the bottom surface of the connecting plate (30), and the output shaft of the electric push rod (32) being connected to a second welding gun (33).

8. The robot welding fixture for steel structure processing according to claim 7 is characterized in that: A fixed seat (34) is installed on the outer side of the lower end of the rotating head (28), and a driving roller (35) and a driven roller (36) are rotatably connected inside the fixed seat (34). One side of the driving roller (35) is connected to a second stepping motor (37), and the second stepping motor (37) is installed on the outer side of the fixed seat (34). A welding wire (38) is abutted between the driving roller (35) and the driven roller (36). One end of the welding wire (38) is placed on the lower end of the rotating head (28), and the other end of the welding wire (38) is placed in a winding reel (39), and the winding reel (39) is rotatably connected to one side of the mechanical arm (27).

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