Discrete type automatic welding workstation

Abstract

The invention relates to the field of welding workstations, in particular to a discrete type automatic welding workstation which comprises movable ground rails, a welding jig frame, displacement equipment and welding equipment, and the welding jig frame and the displacement equipment are laid between the two movable ground rails; welding equipment is arranged on the two movable ground rails respectively and comprises a walking base, a movable stand column, a suspension cross beam and a welding robot, the walking base is slidably connected to the movable ground rails, the movable stand column is arranged on the walking base, the suspension cross beam is arranged on the movable stand column, and the welding robot is slidably connected to one side of the suspension cross beam; the welding robots on the two welding devices are arranged on the two sides of the suspension cross beams correspondingly, after the two welding devices are aligned, a connecting base is connected between the suspension cross beams, and the welding robots slide on one suspension cross beam along the X axis, cross over the connecting base and move to the other suspension cross beam. The welding device is flexible and changeable in structural form, can work independently, can also be connected together through parts to work cooperatively, and is suitable for welding of products of various sizes.

Description

Technical Field

[0001] This invention relates to the field of welding workstation technology, and more particularly to discrete automatic welding workstations. Background Technology

[0002] Welding robot technology has matured significantly, and automated welding by robots replacing manual labor has become an inevitable trend in the industry. Welding workstations centered around welding robots are widely used in various industries, with gantry-type and cantilever-type welding robots being the most common. In the non-standard bulk material handling equipment manufacturing industry, large structural components such as box girders, turntables, and booms are manufactured, as well as small structural components such as trolley frames and balance beams, demonstrating the diversity of workpiece structures and dimensions.

[0003] Conventional welding workstations have fixed structures and are difficult to flexibly deploy welding robots, thus reducing processing flexibility. For large workpieces, gantry-type welding robots can be used because cantilever welding robots have a limited welding range, exceeding the maximum effective range of large workpieces. However, for welding small workpieces, cantilever welding robots are more suitable. Using gantry-type welding robots may result in an overkill situation, leading to wasted equipment capacity, increased energy consumption, and reduced efficiency. Summary of the Invention

[0004] To address the problem that conventional welding workstations have fixed structures and are difficult to flexibly adjust for welding based on workpiece dimensions, this invention provides a discrete automatic welding workstation. The structure of the welding workstation is variable, and it can be configured as a cantilever welding robot or a gantry welding robot. The robot type and welding manipulator can be flexibly selected and adjusted according to project requirements and workpiece dimensions to specifically meet the welding needs of different types of workpieces.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A discrete automatic welding workstation includes a moving ground rail, a welding jig, a positioning device, and a welding device. Multiple welding jigs are laid between two moving ground rails. The positioning device is set between one end of the two moving ground rails. The positioning device includes a positioner and a fixed fixture controlled by the positioner, which facilitates the control of the fixed fixture to change its posture. Welding equipment is installed on two mobile rails, with the two welding devices facing each other. Each welding device includes a walking base, a moving column, a suspension beam, and a welding robot. The walking base slides on the mobile rails, facilitating the movement of the entire welding device along the rails. The moving column is vertically installed above the walking base, and the suspension beam is horizontally installed above the moving column. The welding robot is slidably attached to at least one side of the suspension beam. The welding robot slides bidirectionally along the X and Y axes on the suspension beam, facilitating the horizontal movement and vertical lifting of the welding robot. The welding robots on the two welding devices are respectively arranged on both sides of the suspension beam, providing space for the welding robots to move across. After the two welding devices are aligned, a connecting seat is detachably connected between the suspension beams, which facilitates the connection of the two suspension beams for the welding robots to walk through. The welding robot slides along the X-axis on one suspension beam, moves across the connecting seat to the other suspension beam.

[0006] Furthermore, the two movable ground rails are arranged in parallel with a gap, the two movable ground rails are of different lengths, a displacement device is arranged between one end of the two movable ground rails, and the other end is flush with the ground rails; a safety fence is set on the outside of the movable ground rails to facilitate the safety protection of personnel.

[0007] Furthermore, the multiple welding jigs are arranged in a straight line with intervals between them, and a connecting plate is provided between two adjacent welding jigs. The welding jig is a steel structure grid frame. The welding jig has a certain structural strength to support the product to be welded.

[0008] Furthermore, the positioner is an L-shaped positioner, and the fixing fixture includes a fixture base plate, a centering module one and a centering module two. The centering module one and the centering module two are spaced apart on the fixture base plate. Both the centering module one and the centering module two include a manual bidirectional lead screw module and a fixture controlled by the manual bidirectional lead screw module. The clamp on the first centering module is a frustum cylinder, and the clamp on the second centering module is a pressure plate with a threaded connection to a pressure bolt. A support column is also provided between the first centering module and the second centering module, and the number of the support columns is four in a rectangular arrangement.

[0009] Furthermore, the walking base travels along the moving ground rail via a gear and rack mechanism, and the cross-section of the moving column and the suspended crossbeam is "L"-shaped after connection and combination; after the two welding devices are aligned, the suspended crossbeam and the moving column are arranged in a gate-shaped configuration. This facilitates expanding the movement range of the welding robot.

[0010] Furthermore, the welding robot includes a robot body, a control cabinet, a welding power source, a welding wire hopper, and a wire feeder. The robot body is a six-axis robot with a high degree of freedom. The robot body slides bidirectionally on a suspended crossbeam and is equipped with a dust-removing welding torch. The movable column is equipped with a column tray to facilitate the carrying of the welding robot's components. The column tray surrounds the movable column, and the control cabinet, welding power supply, and welding wire hopper are located on the column tray. The wire feeder is located on the movable column.

[0011] Furthermore, a transverse seat is horizontally slidably connected to the suspension beam. The transverse seat travels along the suspension beam via a gear and rack mechanism. A lifting screw module is vertically mounted on the transverse seat, and a lifting column is slidably connected to the lifting screw module. The robot body is positioned below the lifting column. This facilitates the vertical movement of the robot body.

[0012] Furthermore, the gear and rack traveling mechanism includes a drive motor with a gear on the output shaft, a rack and a slide rail, and a slider. The drive motor is mounted on a transverse seat, and a plurality of sliders are mounted on the transverse seat. The suspension beam and the connecting seat are equipped with slide rails on both sides, with two slide rails on each side, and the slider moves along the slide rails. The racks are provided on both sides of the suspension beam and the connecting seat. The gears on the drive motor mesh with the racks, and the racks are arranged between two parallel slide rails.

[0013] Furthermore, both ends of the connecting seat are bolted to the flange of the suspension beam. This facilitates the assembly and disassembly of the connecting seat. When the welding equipment is running alone, the connecting seat is not installed; when two welding equipment are running together, the connecting seat needs to be installed.

[0014] Furthermore, it also includes a lubrication mechanism for lubricating the walking base and the X-axis sliding of the welding robot. The lubrication mechanism includes an electric lubricating oil pump, a valve block, oil pipes, a bracket, and a lubrication gear. The electric lubricating oil pump is connected to the valve block, and multiple oil pipes are connected to the valve block. Each oil pipe is connected to a slider. The bracket is connected to the lubrication gear via a rotary joint. The valve block is also connected to the lubrication gear via an oil pipe and a rotary joint. The lubrication gear meshes with a rack. The center hole of the lubrication gear is a blind hole. The lower end of the rotary joint is inserted into the center hole of the lubrication gear. Oil outlet holes are evenly opened on the periphery of the lubrication gear. The oil outlet holes are arranged radially along the lubrication gear and communicate with the center hole of the lubrication gear inward.

[0015] The beneficial effects of the present invention through the above technical solution are: This invention arranges welding jigs between two moving ground rails. Multiple welding jigs can be used, one or more of which can support small and large products to be welded. A positioning device is also arranged between the two moving ground rails, which can adjust the position and angle of the products to be welded. Therefore, the products can be welded in a fixed posture on the welding jigs, or in a variable posture on the positioning device.

[0016] This invention features a welding device that travels on each moving track. The welding device can move between positioning equipment and multiple welding jigs, providing a wider service range. The robot body within the welding device performs horizontal lateral movement and vertical lifting / lowering movement on the suspended beam, possessing greater degrees of freedom. When used alone, the robot body can move on the suspended beam, suitable for welding small-sized products. After the connecting base is installed, two welding devices can work collaboratively, allowing the robot body to move between the two suspended beams, suitable for welding large-sized products.

[0017] The welding workstation of this invention features a flexible structure, allowing two welding robots to operate independently. After installing connecting seats between the suspended beams, the robot bodies can move between the two beams, enabling the two welding robots to perform synchronized welding. This expands the robot's operating range and enhances the workstation's flexibility in welding processes, making it suitable for welding products of various sizes. Attached Figure Description

[0018] Figure 1 This is an overall isometric view of the discrete automatic welding workstation of the present invention.

[0019] Figure 2 This is an overall top view of the discrete automatic welding workstation of the present invention.

[0020] Figure 3 This is a schematic diagram of the welding jig of the discrete automatic welding workstation of the present invention.

[0021] Figure 4 This is a schematic diagram of the layout of welding equipment and positioning equipment in the discrete automatic welding workstation of the present invention.

[0022] Figure 5 This invention relates to a discrete automatic welding workstation. Figure 4 Side view.

[0023] Figure 6 This is a schematic diagram of the displacement device of the discrete automatic welding workstation of the present invention.

[0024] Figure 7 This is an isometric drawing of the fixed fixture of the discrete automatic welding workstation of the present invention.

[0025] Figure 8 This invention relates to a discrete automatic welding workstation. Figure 7 Enlarged diagram of point A in the middle.

[0026] Figure 9 This is a top view of the fixed fixture of the discrete automatic welding workstation of the present invention.

[0027] Figure 10 This is a schematic diagram of the welding equipment layout of the discrete automatic welding workstation of the present invention.

[0028] Figure 11 This is one of the isometric drawings of the welding equipment of the discrete automatic welding workstation of the present invention.

[0029] Figure 12 This is the second isometric drawing of the welding equipment of the discrete automatic welding workstation of the present invention.

[0030] Figure 13 This is a front view of the installation of the suspended crossbeam and lifting column of the discrete automatic welding workstation of the present invention.

[0031] Figure 14 This is a side view of the installation of the suspended crossbeam and lifting column of the discrete automatic welding workstation of the present invention.

[0032] Figure 15 This is a top view of the installation of the suspended crossbeam and lifting column of the discrete automatic welding workstation of the present invention.

[0033] Figure 16 This is an isometric drawing of the connector of the discrete automatic welding workstation of the present invention.

[0034] Figure 17 This is a schematic diagram of the lubrication mechanism of the discrete automatic welding workstation of the present invention.

[0035] Figure 18 This invention relates to a discrete automatic welding workstation. Figure 17 Enlarged diagram of point B in the middle.

[0036] The attached diagram is labeled as follows: 1. Moving ground rail; 2. Welding jig; 3. Positioning equipment; 31. Positioner; 32. Fixture; 4. Welding equipment; 5. Connecting plate; 6. Fixture base plate; 7. Centering module one; 8. Centering module two; 9. Walking base; 10. Moving column; 11. Suspension beam; 12. Welding robot; 121. Robot body; 122. Control cabinet; 123. Welding power supply; 124. Welding wire drum; 125. Wire feeder; 13. Column tray; 1 4. Horizontal seat, 15. Lifting screw module, 16. Lifting column, 17. Connecting seat, 18. Gear, 19. Drive motor, 20. Rack, 21. Slide rail, 22. Slider, 231. Electric lubricating oil pump, 232. Valve block, 233. Oil pipe, 234. Bracket, 235. Lubricating gear, 236. Oil outlet, 24. Folding cylinder, 25. Pressure plate, 26. Support column, 27. Pressure bolt, 28. Welding fume extractor, 29. Dust-removing welding torch, 30. Safety fence. Detailed Implementation

[0037] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings: like Figures 1-18 As shown, the discrete automatic welding workstation includes a moving ground rail 1, a welding jig 2, a positioning device 3, and a welding device 4. This workstation is suitable for the non-standard bulk material handling equipment manufacturing industry, covering welding operations for large structural components such as box girders, turntables, and booms, as well as medium and small-sized products such as trolley frames and balance beams. The workstation configuration can be flexibly changed according to product type to meet the welding needs of various products.

[0038] Mobile rails 1 are laid on the ground, providing a path for the corresponding equipment. There are two mobile rails 1, arranged parallel to each other with a gap between them. The two rails 1 are of different lengths, one longer than the other. The other ends of the two mobile rails 1 are flush. A safety fence 30 is installed outside the mobile rails 1 for the safety protection of the entire workstation. The safety fence 30 is composed of several steel structure fences assembled together, thus enclosing the two mobile rails 1. At least one set of laser-guided electronic fences is installed within the safety fence 30.

[0039] Multiple welding jigs 2 are laid between two moving ground rails 1. There are nine welding jigs 2 in total, arranged in a straight line with intervals between them. A connecting plate 5 is set between two adjacent welding jigs 2. The welding jigs 2 are steel structure grid frames with sufficient strength to support the products to be welded. One or more welding jigs 2 can be used to support the products, which can be large structural components such as box girders, turntables, and booms.

[0040] A positioning device 3 is installed between one end of two moving ground rails 1, located at the non-aligned end of the two moving ground rails 1. The positioning device 3 includes a positioner 31 and a fixed clamp 32 controlled by the positioner 31. The positioner 31 is an L-shaped positioner 31, and the fixed clamp 32 is used to clamp small products to be welded, such as the balance beam in the walking mechanism of a ship unloader. The positioner 31 can drive the fixed clamp 32 to rotate, adjusting the position and angle of the fixed clamp 32, thereby changing the posture of the product.

[0041] In this embodiment, the fixing fixture 32 includes a fixture base plate 6, a first centering module 7, and a second centering module 8. The first centering module 7 and the second centering module 8 are spaced apart on the fixture base plate 6, and four support columns 26 are arranged in a rectangular pattern between the first centering module 7 and the second centering module 8. The four support columns 26 work together to support the product to be welded, and then the first centering module 7 and the second centering module 8 simultaneously clamp the product to be welded, thus securely fixing it to the fixing fixture 32.

[0042] Here, both centering module 7 and centering module 8 include a manual bidirectional lead screw module and a clamp controlled by the manual bidirectional lead screw module. The operation of the clamp can be controlled by the manual bidirectional lead screw module. The manual bidirectional lead screw module adopts a forward and reverse trapezoidal lead screw, with the threads at both ends of the lead screw having opposite directions and a self-locking function. The two ends of the forward and reverse trapezoidal lead screw are four-sided prism structures, which facilitates the use of a wrench to turn the forward and reverse trapezoidal lead screw.

[0043] Both ends of the bidirectional trapezoidal lead screw are engaged with nut seats, and clamps are installed on the nut seats. The clamps at both ends move linearly along the manual bidirectional lead screw module. The distance between the clamps at both ends is adjusted by rotating the bidirectional trapezoidal lead screw, and the clamps at both ends are used to clamp the product to be welded. Specifically, the clamp on the centering module 1 7 is a frustum cylinder 24, which can match the round hole of the balance beam to achieve clamping of the round hole of the balance beam. The clamp on the centering module 2 8 is a pressure plate 25. The pressure plate 25 is an inverted "L" shaped plate, and a pressure bolt 27 is threadedly connected to the top of the pressure plate 25. The pressure plate 25 can clamp the outer edge of the balance beam, and the pressure bolt 27 is used to press and fix the product to prevent the balance beam from falling off.

[0044] Welding equipment 4 is installed on two moving ground rails 1, resulting in two welding equipment 4 in the entire workstation. The two welding equipment 4 are arranged facing each other, and when aligned, they can form a portal frame. The welding equipment 4 welds the products to be welded on the positioning device 3 and the welding jig 2. The positioning device 3 can be used with one welding equipment 4, and the welding jig 2 can be used with one or two welding equipment 4.

[0045] The welding equipment 4 includes a walking base 9, a movable column 10, a suspended crossbeam 11, and a welding robot 12. The walking base 9 slides on the movable ground rail 1, which can expand the movement range of the welding equipment 4. Here, the walking base 9 moves along the movable ground rail 1 through a gear and rack walking mechanism. The gear and rack walking mechanism is existing technology and will not be described in detail here.

[0046] A movable column 10 is vertically installed above the walking base 9, and a suspended beam 11 is horizontally installed above the movable column 10. The movable column 10 and the suspended beam 11 are connected and combined to form an "L" shape. A welding robot 12 is slidably connected to at least one side of the suspended beam 11. Here, the welding robot 12 is only distributed on one side of the suspended beam 11. The welding robots 12 on the two welding devices 4 are respectively arranged on both sides of the suspended beam 11. That is, the welding robot 12 on one welding device 4 is arranged on one side of its suspended beam 11, and the welding robot 12 on the other welding device 4 is arranged on the other side of its suspended beam 11. This provides space for the welding robot 12 to move between the suspended beams 11 of the two welding devices 4 and avoids interference.

[0047] The welding robot 12 is mounted on the suspension beam 11 and slides bidirectionally along the X and Y axes, allowing it to slide both horizontally and vertically. The welding robot 12 is a conventional design, comprising a robot body 121, a control cabinet 122, a welding power source 123, a welding wire hopper 124, and a wire feeder 125. The robot body 121 is a six-axis robot, and slides bidirectionally on the suspension beam 11. A dust-removing welding torch 29 is mounted on the robot body 121.

[0048] In the welding robot 12, only the robot body 121 is bidirectionally movable; the other components can only slide along the moving track 1. To support the other components of the welding robot 12, a column tray 13 is mounted on the moving column 10, surrounding the column 10. The control cabinet 122, welding power supply 123, and welding wire hopper 124 are mounted on the column tray 13, and the wire feeder 125 is mounted on the moving column 10. A welding fume extractor 28 is also mounted on the column tray 13. A dust removal hose connects the welding fume extractor 28 to the welding torch 29. The welding fume extractor 28 uses a fan to draw the welding fumes generated during welding by the welding torch 29 into the equipment through the dust removal hose, purifies them, and then discharges them. The entire welding robot 12 can move along the moving track 1, serving the products to be welded on the positioning device 3 and the welding jig 2.

[0049] To enable bidirectional movement of the robot body 121, a transverse seat 14 is horizontally slidably connected to the suspension beam 11. The transverse seat 14 travels along the suspension beam 11 via a gear and rack mechanism, thus enabling it to move horizontally along the suspension beam 11. A lifting screw module 15 is vertically mounted on the transverse seat 14. The transverse seat 14 drives the lifting screw module 15 to move horizontally together. A lifting column 16 is slidably connected to the lifting screw module 15. The lifting screw module 15 controls the lifting column 16 to move up and down. The robot body 121 is positioned below the lifting column 16, thus enabling the robot body 121 to move bidirectionally, both horizontally and vertically.

[0050] The two welding devices 4 can operate independently along their respective moving tracks 1. Of course, when dealing with large structural components, the two welding devices 4 can be combined to achieve a collaborative operation. Specifically, after the two welding devices 4 are aligned, the suspension beam 11 and the moving column 10 are arranged in a U-shape. After the two welding devices 4 are aligned, a connecting seat 17 is detachably connected between the suspension beams 11, and the two ends of the connecting seat 17 are bolted to the flanges of the suspension beams 11.

[0051] The two suspension beams 11 of the welding equipment 4 are connected together by the connecting seat 17 to form a longer walking channel. As a result, the welding robot 12 can slide along the X-axis on one suspension beam 11, move across the connecting seat 17 to the other suspension beam 11, and thus the welding robot 12 can walk between the two suspension beams 11, with a longer travel distance, and can carry out welding operations over a wider range.

[0052] The rack and pinion mechanism used to drive the robot body 121 to move laterally is described here. The rack and pinion mechanism includes a drive motor 19 with a gear 18 on its output shaft, a rack 20, a slide rail 21, and sliders 22. The drive motor 19 is located on the front of the transverse base 14, and its output shaft passes through the transverse base 14 and extends out to the back of the transverse base 14, where it is connected to the gear 18. Multiple sliders 22 are also located on the back of the transverse base 14.

[0053] Slide rails 21 are provided on both sides of the suspension beam 11 and both sides of the connecting seat 17. There are two slide rails 21 on each side, arranged vertically and horizontally. The slider 22 moves along the slide rails 21, and the transverse seat 14 can move along the suspension beam 11 through the cooperation of the slider 22 and the slide rails 21. At the same time, racks 20 are provided on both sides of the suspension beam 11 and both sides of the connecting seat 17. The racks 20 are arranged between the two parallel slide rails 21, and the gear 18 on the drive motor 19 meshes with the racks 20.

[0054] In this way, after the drive motor 19 starts, the transverse seat 14 can be driven to move on the suspension beam 11 through the meshing of the gear 18 and rack 20 and the cooperation of the slide rail 21. Since both the suspension beam 11 and the connecting seat 17 have racks 20 and slide rails 21, the transverse seat 14 can reciprocate between the two suspension beams 11.

[0055] The principle of this invention is as follows: Welding robots 12 are flexibly deployed according to the type of product to be welded. For example, when processing small-sized products, they can be placed on the positioning device 3 or on the welding jig 2 for welding. When placed on the positioning device 3, one welding device 4 can be used for operation; multiple small-sized products can be placed on the welding jig 2, with two welding devices 4 welding simultaneously. When processing large-sized products, the products are hoisted onto the welding jig 2, and two welding devices 4 can be used simultaneously for welding. Alternatively, the connecting seat 17 can be used to connect the suspension beams 11 of the two welding devices 4, allowing the welding robot 12 to move between the two suspension beams 11, better serving the welding of large-sized products, and featuring a wide coverage area and large operating radius.

[0056] The entire welding workstation is controlled by an industrial computer, which is connected to a PLC control cabinet 122 and can send control commands to the PLC control cabinet 122. The PLC control cabinet 122 is connected to the positioner 3 and the welding equipment 4, and can control the movement of the positioner 3 and the welding equipment 4.

[0057] To optimize the product structure and ensure smooth operation of components, the workstation also includes a lubrication mechanism. The lubrication mechanism is used to lubricate the sliding of the walking base 9 and the welding robot 12X axis. The lubrication mechanism is set in two places, one on the walking base 9 and the other on the horizontal seat 14.

[0058] The lubrication mechanism includes an electric lubricating oil pump 231, a valve block 232, oil pipes 233, a bracket 234, and a lubrication gear 235. The electric lubricating oil pump 231 stores and pumps lubricating oil. The pump is connected to the valve block 232 via oil pipes 233, which distributes the lubricating oil. Multiple oil pipes 233 are connected to the valve block 232, and each pipe connects to a slider 22, thus distributing lubricating oil to each slider 22.

[0059] The bracket 234 is used to fix the lubrication gear 235 to a certain carrier. For example, the bracket 234 is installed with the traveling base 9, which can fix the lubrication gear 235 to the traveling base 9. The bracket 234 is connected to the lubrication gear 235 through a rotary joint, that is, a rotary joint is provided at one end of the bracket 234, and the lubrication gear 235 is provided on the rotary joint, so that the lubrication gear 235 can rotate. The lubrication gear 235 meshes with the rack 20. The valve block 232 is also connected to the lubrication gear 235 in sequence through the oil pipe 233 and the rotary joint, so that lubricating oil can be supplied to the lubrication gear 235 through the oil pipe 233 and the rotary joint.

[0060] The purpose of the lubricating gear 235 is to lubricate the rack 20, thereby ensuring lubrication of the gear 18 and rack 20 on the drive motor 19. The center hole of the lubricating gear 235 is a blind hole, and the lower end of the rotary joint is inserted into the center hole of the lubricating gear 235 and fixed thereto. Three oil outlet holes 236 are evenly distributed around the circumference of the lubricating gear 235, arranged radially along the gear. The oil outlet holes 236 communicate inward with the center hole of the gear 235 and extend outward to the edge of the gear 235. The lubricating oil delivered by the rotary joint flows out of the lubricating gear 235 after passing through the center hole and the oil outlet holes 236, thus lubricating the rack 20.

[0061] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention should be included within the scope of the present invention.

Claims

1. A discrete automatic welding workstation, characterized in that, It includes a movable ground rail (1), a welding jig (2), a positioning device (3), and a welding device (4). Multiple welding jigs (2) are laid between the two movable ground rails (1). The positioning device (3) is set between one end of the two movable ground rails (1). The positioning device (3) includes a positioner (31) and a fixing clamp (32) controlled by the positioner (31). Welding equipment (4) is installed on two mobile rails (1) respectively. The two welding equipment (4) are arranged facing each other. The welding equipment (4) includes a walking base (9), a moving column (10), a suspension beam (11) and a welding robot (12). The walking base (9) is slidably connected to the mobile rail (1). The moving column (10) is vertically installed above the walking base (9). The suspension beam (11) is horizontally installed above the moving column (10). The welding robot (12) is slidably connected to at least one side of the suspension beam (11). The welding robot (12) is placed on the suspension beam (11) and slides bidirectionally along the X-axis and Y-axis directions. Welding robots (12) on the two welding devices (4) are respectively arranged on both sides of the suspension beam (11). After the two welding devices (4) are aligned, a connecting seat (17) is detachably connected between the suspension beams (11). The welding robot (12) slides along the X-axis on one suspension beam (11), passes the connecting seat (17), and moves to the other suspension beam (11).

2. The discrete automatic welding workstation according to claim 1, characterized in that, The two movable ground rails (1) are arranged in parallel with a gap between them. The two movable ground rails (1) have different lengths. A displacement device (3) is arranged between one end of the two movable ground rails (1) and the other end is flush with it. A safety fence (30) is set on the outside of the movable ground rails (1).

3. The discrete automatic welding workstation according to claim 1, characterized in that, Multiple welding jigs (2) are arranged in a straight line with intervals, and a connecting plate (5) is provided between two adjacent welding jigs (2). The welding jigs (2) are steel structure grid frames.

4. The discrete automatic welding workstation according to claim 1, characterized in that, The positioner (31) is an L-type positioner (31). The fixing fixture (32) includes a fixture base plate (6), a centering module one (7) and a centering module two (8). The centering module one (7) and the centering module two (8) are spaced apart on the fixture base plate (6). The centering module one (7) and the centering module two (8) both include a manual bidirectional screw module and a fixture controlled by the manual bidirectional screw module. The clamp on the centering module one (7) is a frustum cylinder (24), and the clamp on the centering module two (8) is a pressure plate (25). The pressure plate (25) is threaded with a pressure bolt (27). A support column (26) is also provided between the centering module one (7) and the centering module two (8). The number of the support columns (26) is four in a rectangular arrangement.

5. The discrete automatic welding workstation according to claim 1, characterized in that, The walking base (9) travels along the moving ground rail (1) via a gear and rack walking mechanism. The cross section of the moving column (10) and the suspension beam (11) is "L" shaped after being connected and combined. After the two welding devices (4) are aligned, the suspension beam (11) and the moving column (10) are arranged in a gate shape.

6. The discrete automatic welding workstation according to claim 1, characterized in that, The welding robot (12) includes a robot body (121), a control cabinet (122), a welding power source (123), a welding wire hopper (124), and a wire feeder (125). The robot body (121) is a six-axis robot. The robot body (121) is placed on a suspension beam (11) and slides in both directions. The robot body (121) is equipped with a dust removal welding torch (29). The movable column (10) is provided with a column tray (13), which surrounds the movable column (10). The control cabinet (122), welding power source (123) and welding wire hopper (124) are provided on the column tray (13), and the wire feeder (125) is provided on the movable column (10).

7. The discrete automatic welding workstation according to claim 6, characterized in that, A horizontal seat (14) is slidably connected to the suspension beam (11). The horizontal seat (14) travels along the suspension beam (11) via a gear and rack walking mechanism. A lifting screw module (15) is vertically arranged on the horizontal seat (14). A lifting column (16) is slidably connected to the lifting screw module (15). The robot body (121) is arranged below the lifting column (16).

8. The discrete automatic welding workstation according to claim 7, characterized in that, The gear and rack traveling mechanism includes a drive motor (19) with an output shaft and a gear (18), a rack (20), a slide rail (21), and a slider (22). The drive motor (19) is mounted on a transverse seat (14), and a plurality of sliders (22) are mounted on the transverse seat (14). The suspension beam (11) and the connecting seat (17) are provided with slide rails (21) on both sides. There are two slide rails (21) on each side, and the slider (22) moves along the slide rails (21). The suspension beam (11) and the connecting seat (17) are both provided with racks (20). The gear (18) on the drive motor (19) meshes with the rack (20). The rack (20) is arranged between two parallel slide rails (21).

9. The discrete automatic welding workstation according to claim 1, characterized in that, The two ends of the connecting seat (17) are bolted to the flange of the suspension beam (11).

10. The discrete automatic welding workstation according to claim 1, characterized in that, It also includes a lubrication mechanism for lubricating the sliding of the walking base (9) and the welding robot (12) along the X-axis. The lubrication mechanism includes an electric lubricating oil pump (231), a valve block (232), oil pipes (233), a bracket (234), and a lubrication gear (235). The electric lubricating oil pump (231) is connected to the valve block (232), and multiple oil pipes (233) are connected to the valve block (232). Each oil pipe (233) is connected to a slider (22). The bracket (234) is connected to the lubrication gear (235) via a rotary joint. The valve block (232) is also connected to the lubrication gear (235) via an oil pipe (233) and a rotary joint. The lubrication gear (235) is meshed with a rack (20). The center hole of the lubrication gear (235) is a blind hole. The lower end of the rotary joint is inserted into the center hole of the lubrication gear (235). Oil outlet holes (236) are evenly opened on the periphery of the lubrication gear (235). The oil outlet holes (236) are arranged radially along the lubrication gear (235). The oil outlet holes (236) are connected to the center hole of the lubrication gear (235) inward.

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