A positioning device for steel grating welding

Abstract

The present application relates to the technical field of metal processing and welding auxiliary equipment, and discloses a positioning device for welding steel gratings, which includes a workbench, a clamping mechanism for positioning the bottom flat steel, a positioning member for positioning the middle flat steel, and a positioning block for positioning the frame. The surface of the workbench is provided with a plurality of adjustment slots corresponding to the arrangement of the bottom flat steels. The clamping mechanism includes two clamping plates located on both sides of the length direction of the bottom flat steels and sliding relatively in a single adjustment slot, a driving member driving the two clamping plates to slide relatively, and a linkage member controlling the joint operation of the plurality of driving members. Each bottom flat steel is jointly limited in a plurality of pairs of clamping plates located on both sides of its length direction. The present application has the effect of improving the welding accuracy of steel gratings.

Description

Technical Field

[0001] The present application relates to the technical field of metal processing and welding auxiliary equipment, and in particular to a positioning device for steel grating welding. Background Art

[0002] Steel grating, also known as steel grille plate or steel grille, is a grid-like structural material made of flat steel and cross bars arranged at a certain distance and fixed by welding or pressing. Steel grating, also known as steel grille plate or steel grille, is a grid-like structural material made of flat steel and cross bars arranged at a certain distance and fixed by welding or pressing.

[0003] refer to Figure 1 The steel grating 01 includes an internal grid structure and an external frame 011. The grid structure is formed by the cross arrangement of flat steel 012 and cross bar 013, and includes three layers from top to bottom. The bottom layer is a number of parallel flat steel 012, and the top of such flat steel 012 is provided with a number of stamped bayonet 0121 along its own length direction; the middle layer is a number of flat steel 012 perpendicular to the length direction of the bottom flat steel 012, and the top of such flat steel 012 is also stamped with a plug-in interface 0122 for the cross bar 013 to plug in at the position of the bayonet 0121. The frame 011 matches the size of the grid structure and surrounds the outer periphery of the grid structure. Finally, the intersection of the flat steel 012, cross bar 013 and frame 011 is welded to obtain the finished steel grating 01.

[0004] In the steps of making the above-mentioned steel grating, when the steel grating is placed on a workbench and spliced, and is ready for welding, the steel grating is easily moved relative to the workbench under the action of external force, thereby causing the welding gun to offset the position of the welding point of the steel grating, which not only affects the welding accuracy of the final steel grating, but may also cause a loose connection between the flat steel and the cross bar, further affecting the overall structural strength of the steel grating and reducing its bearing capacity and service life. Summary of the invention

[0005] In order to improve the welding accuracy of steel gratings, the present application provides a positioning device for steel grating welding.

[0006] The present application provides a positioning device for welding a steel grating using the following technical solution:

[0007] A positioning device for steel grating welding comprises a workbench, on which are provided a clamping mechanism for positioning bottom-layer flat steel, a positioning member for positioning middle-layer flat steel and a positioning block for positioning a frame, a surface of the workbench is provided with a plurality of adjustment slots corresponding to the arrangement of the bottom-layer flat steel, the clamping mechanism comprises two clamping plates located on both sides of the length direction of the bottom-layer flat steel and sliding relatively in a single adjustment slot, a driving member driving the two clamping plates to slide relatively and a linkage member controlling the joint operation of the plurality of driving members, and each bottom-layer flat steel is jointly limited in a plurality of pairs of the clamping plates located on both sides of its own length direction.

[0008] By adopting the above technical solution, the positioning device is used to assist in welding the steel grating. First, the positioning block is used to position the frame; then the bottom flat steel is arranged in parallel in the frame until each flat steel is placed in the corresponding several adjustment slots, and the linkage controls several driving parts to work together, and all driving parts synchronously drive the corresponding clamping plates to slide relatively until all the bottom flat steels are fixed at the same time; then when the middle flat steel is inserted into the bayonet of the bottom flat steel, the positioning part is used to assist in positioning it; finally, after the cross bar is laid, precise welding can be performed. The positioning device for welding steel grating can effectively prevent the displacement of the steel grating during welding, improve the welding accuracy of the steel grating, and thus improve the overall structural strength and service life of the steel grating.

[0009] Optionally, a limit sliding frame is fixedly arranged on the side wall of each adjustment slot along the sliding direction of the clamping plate on the bottom wall of the workbench, and the clamping plate is arranged in an L-shape. The horizontal part of each clamping plate is slidably arranged in the corresponding limit sliding frame, and the vertical part thereof extends upward to form an adjustment slot for clamping the bottom flat steel.

[0010] By adopting the above technical solution, the clamping plate slides under the limit guide of the limit sliding frame, and clamps the bottom flat steel through the vertical part of the adjustment slot extending upward, which not only improves the stability of the bottom flat steel during the welding process, but also improves the welding accuracy and connection firmness of the steel grating.

[0011] The cam is an assembly made of a plurality of camshafts, each of which is connected to a pair of camshafts, and the camshafts are connected to a pair of camshafts, each of which is connected to a pair of camshafts, each of which is connected to a pair of camshafts, each of which is connected to a pair of camshafts, each of which is connected to a pair of camshafts, each of which is connected to a pair of camshafts, each of which is connected to a pair of camshafts, each of which is connected to a pair of camshafts, each of which is connected to a pair of camshafts, each of which is connected to a pair of camshafts, each of which is connected to a pair of camshafts,

[0012] By adopting the above technical solution, when the flat steels laid on the bottom layer are arranged in parallel in the frame, and each flat steel is placed in the corresponding several adjustment slots, the limit sliding frame is fixedly set on the bottom wall of the workbench, and the hinge point here can only rotate in situ. Since the length of the first hinge rod is constant, when the driving rod is driven to move upward, the other end of the first hinge rod pushes the driving block to slide in the direction close to the clamping plate, and the sliding of the driving block along the guide of the driving rod will drive the second hinge rod to slide in the direction close to the clamping plate synchronously, and the movement of the adjacent driving parts is also the same, thereby achieving the fixation of the bottom layer relative to the clamping plate. This design enables the clamping mechanism to stably clamp the bottom layer flat steel, improves the stability during welding, and thus improves the welding accuracy of the steel grating.

[0013] Optionally, several driving blocks located in the length direction of the driving rod are movably mounted on the same driving rod, and several driving rods are arranged in parallel, each of the driving rods is located directly below the corresponding adjusting through slot, the linkage comprises a connecting rod commonly connecting the ends of the same side of the several driving rods, a guide rod sliding through the connecting rod vertically, and a screw rod rotating through the connecting rod vertically by a thread, a mounting frame is provided at the bottom of the workbench, the driving rod, connecting rod, guide rod and screw are all located in the mounting frame, the guide rod is fixedly connected between the mounting frame and the bottom wall of the workbench, the screw rod is rotatably connected between the mounting frame and the bottom wall of the workbench, and a servo motor driving the screw rod to rotate is provided on the mounting frame.

[0014] By adopting the above technical solution, the servo motor is started, and the servo motor drives the screw to rotate. Under the guide limit of the guide rod, the rotation of the screw drives the connecting rod matched with the screw to move upward, and the upward movement of the connecting rod drives multiple driving rods to move upward synchronously. The driving rod drives multiple driving blocks to move synchronously, so that the two clamping plates slide inward at the same time, thereby realizing the rapid clamping of the bottom flat steel. The cooperation of the screw and the servo motor makes the clamping force of the two clamping plates on the middle flat steel adjustable, thereby improving the applicability to the bottom flat steel of different thicknesses, and the setting of the linkage also improves the uniformity and reliability of the clamping operation, improves the stability of the position of the flat steel during welding, and reduces the possibility of welding deviation.

[0015] Optionally, the positioning member includes a U-shaped support seat arranged between two adjacent adjustment slots along a direction parallel to the length of the bottom flat steel and a fixed block relatively arranged on two side walls inside the support seat. The support seat is arranged to avoid the bottom flat steel, and guide surfaces are provided on opposite sides of the top ends of the two fixed blocks.

[0016] By adopting the above technical scheme, the setting of the support seat makes it possible for the middle-layer flat steel to be inserted into the bayonet of the bottom-layer flat steel, first guided downward by the guide surface, and then inserted between the two fixed blocks. The two ends of the middle-layer flat steel are restricted by the frame, and the two sides in the length direction are limited by the fixed blocks. When the middle-layer flat steel is synchronously inserted into the bayonet of multiple bottom-layer flat steels, the possibility of deformation of the flat steel itself caused by the excessive length of the flat steel can be reduced, thereby improving the overall docking accuracy of the middle-layer flat steel inserted into the bayonet of the bottom-layer flat steel, improving the assembly efficiency while also improving the welding accuracy of the steel grating.

[0017] Optionally, each of the fixed blocks is provided with a sliding rod on one side facing the inner wall of the support seat, the length direction of the sliding rod is parallel to the direction of relative sliding of the two fixed blocks, the sliding rod slides through the corresponding side wall of the support seat, and an end block is provided on the end portion of the sliding rod passing through the side wall of the support seat, and a spring is sleeved on the rod body of the sliding rod extending out of the support seat, the spring abuts against the corresponding end block and the opposite side wall of the support seat, and when the spring is in a natural state, the two fixed blocks are fitted together.

[0018] By adopting the above technical solution, the elastic force of the spring is used to make the two fixing blocks fit tightly to the middle flat steel, thereby improving the applicability to middle flat steels of different thicknesses, reducing the possibility of position deviation of the middle flat steel during welding, and thus improving the welding accuracy and the overall structural strength of the steel grating.

[0019] Optionally, one positioning block is provided on each of the outer side walls at four right angles corresponding to the frame, and each positioning block is provided with a chamfer on the inner side wall at the top end facing the frame.

[0020] By adopting the above technical solution, each positioning block is provided with a chamfer on the inner side wall of the top end facing the frame, which can effectively guide the frame to enter the positioning position quickly and accurately, and reduce the hard contact between the frame and the positioning block during placement or adjustment, thereby improving positioning accuracy and efficiency and reducing the possibility of wear.

[0021] Optionally, a plurality of plug-in rods are provided on the bottom wall of each positioning block, each of the plug-in rods is vertically arranged, and a plug-in through hole for inserting the plug-in rods is opened on the workbench, and a plurality of the plug-in through holes are provided on the workbench corresponding to the frames of different sizes.

[0022] By adopting the above technical solution, the multiple plug-in rods on the bottom wall of the positioning block cooperate with the plug-in through holes on the workbench, so that the positioning block can be quickly and accurately positioned on the workbench, thereby adapting to frames of different sizes. This not only improves the adaptability of the positioning device to steel gratings of different sizes, but also improves the positioning accuracy of the positioning block to the steel grating.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. Use the positioning device to assist in welding the steel grating. First, use the positioning block to position the frame. Then, lay the bottom flat steel in parallel in the frame until each flat steel is placed in the corresponding several adjustment slots. Use the linkage to control several driving parts to work together. All driving parts synchronously drive the corresponding clamping plates to slide relative to each other until all the bottom flat steels are fixed at the same time. Then, when the middle flat steel is inserted into the bayonet of the bottom flat steel, use the positioning parts to assist in positioning. Finally, after laying the crossbar, precise welding can be performed. The positioning device for steel grating welding can effectively prevent the displacement of the steel grating during welding, improve the welding accuracy of the steel grating, and thus improve the overall structural strength and service life of the steel grating.

[0025] 2. The clamping plate slides under the limit guide of the limit sliding frame, and clamps the bottom flat steel through the vertical part of the adjustment slot extending upward, which not only improves the stability of the bottom flat steel during the welding process, but also improves the welding accuracy and connection firmness of the steel grating;

[0026] 3. When the flat steels used for laying on the bottom layer are arranged in parallel in the frame, and each flat steel is placed in the corresponding several adjustment slots, the limit sliding frame is fixedly set on the bottom wall of the workbench, and the hinge point here can only rotate in situ. Since the length of the first hinge rod is fixed, when the driving rod is driven to move upward, the other end of the first hinge rod pushes the driving block to slide in the direction close to the clamping plate, and the sliding of the driving block along the guide of the driving rod will drive the second hinge rod to slide synchronously in the direction close to the clamping plate, and the movement of the adjacent driving parts is also the same, thereby achieving the fixation of the bottom layer relative to the clamping plate. This design enables the clamping mechanism to stably clamp the bottom layer flat steel, improves the stability during welding, and thus improves the welding accuracy of the steel grating. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of steel grating.

[0028] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of actual application when the steel grating is placed on the embodiment of the present application.

[0030] Figure 4 It is a schematic diagram showing the connection relationship between the positioning block and the insertion rod in the embodiment of the present application.

[0031] Figure 5 It is a schematic diagram showing the connection relationship between the driving rod, the driving block and the first hinge rod in the embodiment of the present application.

[0032] Figure 6 It is a schematic diagram showing the connection relationship between the driving rod, the driving block and the second hinge rod in the embodiment of the present application.

[0033] Figure 7 It is a schematic diagram showing the connection relationship between the support base and the fixing block in the embodiment of the present application.

[0034] Description of reference numerals:

[0035] 01. Steel grating; 011. Frame; 012. Flat steel; 0121. Bayonet; 0122. Plug-in interface; 013. Crossbar; 1. Workbench; 11. Plug-in through hole; 12. Adjustment through slot; 2. Clamping mechanism; 21. Clamping plate; 211. Rubber pad; 22. Driving member; 221. Driving rod; 222. Driving block; 223. First hinged rod; 224. Second hinged rod; 23. Linkage member; 231. Connecting rod; 232. Guide rod; 233. Screw; 3. Positioning member; 31. Support seat; 32. Fixed block; 321. Sliding rod; 322. End block; 4. Positioning block; 41. Plug-in rod; 5. Limiting sliding frame; 6. Mounting frame; 7. Servo motor; 8. Reinforcement rib; 9. Spring. DETAILED DESCRIPTION

[0036] The following is combined with Figure 2-7 This application is described in further detail.

[0037] The embodiment of the present application discloses a positioning device for welding steel gratings.

[0038] Reference Figure 2 and Figure 3 A positioning device for steel grating welding includes a workbench 1, on which a clamping mechanism 2, a positioning member 3 and a positioning block 4 are arranged. The clamping mechanism 2 is used to position the bottom flat steel 012, the positioning member 3 is used to position the middle flat steel 012, and the positioning block 4 is used to position the frame 011.

[0039] Reference Figure 2 and Figure 3 , use the positioning device to assist in welding the steel grating 01, first use the positioning block 4 to position the frame 011; then arrange the bottom flat steel 012 in parallel in the frame 011, and use the clamping mechanism 2 to position the bottom flat steel 012; then when the middle flat steel 012 is inserted into the bayonet 0121 of the bottom flat steel 012, use the positioning piece 3 to assist in positioning it; finally, after laying the cross bar 013, the welding operation can be carried out on the intersection of the frame 011, the bottom flat steel 012, the middle flat steel 012 and the cross bar 013.

[0040] Reference Figure 2 and Figure 4 A positioning block 4 is provided on the outer wall at four right angles corresponding to the frame 011, and a chamfer is provided on the inner wall at the top end of each positioning block 4 facing the frame 011. A plurality of plug-in rods 41 are provided on the bottom wall of each positioning block 4. In this embodiment, two are taken as an example. Each plug-in rod 41 is vertically fixed on the bottom wall of the positioning block 4, and a plug-in through hole 11 for inserting the plug-in through hole 11 is provided on the workbench 1. Several plug-in through holes 11 are provided on the workbench 1 corresponding to the frames 011 of different sizes.

[0041] Reference Figure 2 , Figure 3 and Figure 5, a plurality of adjustment slots 12 are opened on the surface of the workbench 1 corresponding to the arrangement of the bottom flat steel 012, and the clamping mechanism 2 includes a clamping plate 21, a driving member 22 and a linkage member 23. Two clamping plates 21 are provided corresponding to each adjustment slot 12, and the two clamping plates 21 are relatively slidably arranged on both sides along the length direction of the bottom flat steel 012, and rubber pads 211 are fixedly arranged on the opposite sides of the two clamping plates 21. A limited sliding frame 5 is fixedly arranged on the side wall of each adjustment slot 12 along the sliding direction of the clamping plate 21 on the bottom wall of the workbench 1, and the clamping plate 21 is arranged in an L shape. The horizontal part of each clamping plate 21 is slidably arranged in the corresponding limited sliding frame 5, and its vertical part extends upward to form an adjustment slot 12 for clamping the bottom flat steel 012.

[0042] Reference Figure 2 , Figure 3 , Figure 5 and Figure 6 The driving member 22 includes a driving rod 221, a driving block 222, a first hinge rod 223 and a second hinge rod 224. The driving rod 221 is arranged perpendicular to the length direction of the bottom flat steel 012, and a plurality of driving rods 221 are arranged in parallel corresponding to the number of the bottom flat steel 012. Each driving rod 221 is located directly below the corresponding adjusting slot 12. The plurality of driving blocks 222 located in the length direction of the driving rod 221 are movably mounted on the same driving rod 221. The first hinge rod 223 is hinged on the side wall on the same side of the limiting sliding frame 5 and the driving block 222. The second hinge rod 224 is hinged on the corner of the clamping plate 21 and the side wall on the same side of the driving block 222. The first hinge rod 223 and the second hinge rod 224 are respectively located on both sides of the driving block 222. The movement process among the first hinge rod 223, the second hinge rod 224, the horizontal part of the clamping plate 21 and the limiting sliding frame 5 is always arranged in an acute triangle in three-dimensional space.

[0043] Reference Figure 2 , Figure 3 , Figure 5 and Figure 6 When the driving rod 221 moves upward, it drives several driving blocks 222 on the driving rod 221 to move upward synchronously. Due to the rotational cooperation between one end of the first hinged rod 223 and the limiting sliding frame 5, the other end pushes the driving block 222 to slide in the direction close to the clamping plate 21. At this time, the driving block 222 drives the second hinged rod 224 to slide synchronously in the direction close to the clamping plate 21 along the guidance of the driving rod 221. The sliding second hinged rod 224 pushes the clamping plate 21 to slide in the direction close to the clamping plate 21 on the other side until the bottom flat steel 012 is clamped.

[0044] Reference Figure 2 and Figure 5The bottom of the workbench 1 is fixedly provided with a mounting frame 6, and the linkage member 23 includes a connecting rod 231, a guide rod 232 and a screw rod 233. The connecting rod 231 is connected to the ends of the same side of a plurality of driving rods 221, and the guide rod 232 is vertically slidably passed through the connecting rod 231, and is fixedly connected between the mounting frame 6 and the bottom wall of the workbench 1; the screw rod 233 is vertically passed through the connecting rod 231 by thread rotation, and is rotationally connected between the mounting frame 6 and the bottom wall of the workbench 1. In this embodiment, the guide rod 232 is located at three of the four corners of the frame surrounded by two connecting rods 231 and a plurality of driving rods 221, and the screw rod 233 is located at one of the four corners. A servo motor 7 is fixedly provided at the bottom of the mounting frame 6, and its output shaft is rotationally passed through the mounting frame 6, and is coaxially fixedly connected with the screw rod 233.

[0045] Reference Figure 5 In order to strengthen the connection strength between the driving rods 221 , a reinforcing rib 8 is fixedly connected between each two adjacent driving rods 221 .

[0046] Reference Figure 2 , Figure 3 and Figure 6 The positioning member 3 includes a U-shaped support seat 31 and a fixing block 32. The base height of the U-shaped support seat 31 matches the bottom height of the bayonet 0121 of the bottom flat steel 012. The support seat 31 is arranged between two adjacent adjustment slots 12 in a direction parallel to the length of the bottom flat steel 012, avoiding the bottom flat steel 012, and is fixed on the workbench 1. The fixing blocks 32 are arranged on two opposite side walls in the support seat 31, and guide surfaces are arranged on opposite sides of the top ends of the two fixing blocks 32.

[0047] Reference Figure 6 A sliding rod 321 is fixedly provided on one side of each fixed block 32 facing the inner wall of the support seat 31. The length direction of the sliding rod 321 is parallel to the direction in which the two fixed blocks 32 slide relative to each other, and the sliding rod 321 slides through the corresponding side wall of the support seat 31, and an end block 322 is fixedly provided on the end portion of the sliding rod 321 that penetrates the side wall of the support seat 31. A spring 9 is sleeved on the rod body of the sliding rod 321 extending out of the support seat 31, and the spring 9 abuts against the corresponding end block 322 and the opposite side wall of the support seat 31. When the spring 9 is in a natural state, the two fixed blocks 32 are fitted together.

[0048] The implementation principle of the positioning device for welding steel gratings in the embodiment of the present application is as follows: using the positioning device to assist in welding the steel grating 01, firstly using the positioning block 4 to position the frame 011;

[0049] Then, the bottom layer of flat steel 012 is arranged in parallel in the frame 011 until each flat steel 012 is placed in the corresponding plurality of adjustment slots 12, and the servo motor 7 is started to work. The servo motor 7 drives the screw rod 233 to rotate. Under the guide limit of the guide rod 232, the rotation of the screw rod 233 drives the connecting rod 231 threadedly matched therewith to move upward, and the upward movement of the connecting rod 231 drives multiple driving rods 221 to move upward synchronously, and the driving rod 221 drives multiple driving blocks 222 to move synchronously, and one end of the first hinge rod 223 rotates and cooperates with the limiting sliding frame 5, and the other end pushes the driving block 222 to slide in the direction close to the clamping plate 21, and the driving block 222 drives the second hinge rod 224 to slide in the direction close to the clamping plate 21 along the guidance of the driving rod 221, and the sliding second hinge rod 224 pushes the clamping plate 21 to slide in the direction close to the clamping plate 21 on the other side until the bottom layer of flat steel 012 is clamped;

[0050] Then, when the middle flat steel 012 is inserted into the bayonet 0121 of the bottom flat steel 012, it is first guided by the guide surface and inserted between the two fixed blocks 32. The two ends of the middle flat steel 012 are restricted by the frame 011, and the two sides of its length direction are limited by the fixed blocks 32. Finally, after the crossbar 013 is laid, the steel grating 01 can be accurately welded.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A positioning device for steel grating welding, characterized in that , comprising a workbench (1), the workbench (1) being provided with a clamping mechanism (2) for positioning the bottom layer flat steel, a positioning member (3) for positioning the middle layer flat steel and a positioning block (4) for positioning the frame (011), a plurality of adjustment slots (12) being opened on the surface of the workbench (1) corresponding to the arrangement of the bottom layer flat steel, the clamping mechanism (2) comprising two clamping plates (21) located on both sides of the length direction of the bottom layer flat steel and sliding relatively in a single adjustment slot (12), a driving member (22) for driving the two clamping plates (21) to slide relatively, and a linkage member (22) for controlling the joint operation of the plurality of driving members (22) 23), each bottom layer of flat steel is commonly limited in a plurality of pairs of the clamping plates (21) located on both sides of its own length direction; a limit sliding frame (5) is fixedly arranged on the side wall of each adjusting slot (12) along the sliding direction of the clamping plate (21) on the bottom wall of the workbench (1), and the clamping plate (21) is arranged in an L-shape, and the horizontal part of each clamping plate (21) is slidably arranged in the corresponding limit sliding frame (5), and its vertical part extends upward to form an adjusting slot (12) for clamping the bottom layer of flat steel; the driving member (22) includes a driving member arranged perpendicular to the length direction of the bottom layer of flat steel A rod (221), a driving block (222) slidably sleeved on the driving rod (221), a first hinged rod (223) hinged on the side wall on the same side of the limiting sliding frame (5) and the driving block (222), and a second hinged rod (224) hinged on the corner of the clamping plate (21) and the side wall on the same side of the driving block (222), the first hinged rod (223) and the second hinged rod (224) are respectively located on both sides of the driving block (222), and the first hinged rod (223), the second hinged rod (224), the horizontal part of the clamping plate (21) and the limiting sliding frame (5) are arranged in a triangle. When the driving rod (221) moves upward, it drives the driving block (222) to move upward synchronously. One end of the first hinged rod (223) rotates and cooperates with the limiting sliding frame (5), and the other end pushes the driving block (222) to slide in the direction close to the clamping plate (21). The driving block (222) drives the second hinged rod (224) to slide in the direction close to the clamping plate (21) along the guidance of the driving rod (221). The sliding second hinged rod (224) pushes the clamping plate (21) to slide in the direction close to the clamping plate (21) on the other side until the bottom flat steel is clamped.

2. A steel grating welding positioning device according to claim 1, characterized in that The plurality of driving blocks (222) located in the length direction of the driving rod (221) are all movably sleeved on the same driving rod (221), and the driving rod (221) is provided with a plurality of driving blocks (222) in parallel, each of the driving rods (221) is located directly below the corresponding adjustment slot (12), and the linkage member (23) comprises a connecting rod (231) which is commonly connected to the same side ends of the plurality of driving rods (221), a guide rod (232) which is vertically slidably penetrated through the connecting rod (231), and a connecting rod (231) which is vertically rotatably penetrated through the connecting rod (231) by means of a thread. The bottom of the workbench (1) is provided with a mounting frame (6), the driving rod (221), the connecting rod (231), the guide rod (232) and the screw rod (233) are all located in the mounting frame (6), the guide rod (232) is fixedly connected between the mounting frame (6) and the bottom wall of the workbench (1), the screw rod (233) is rotatably connected between the mounting frame (6) and the bottom wall of the workbench (1), and a servo motor (7) for driving the screw rod (233) to rotate is provided on the mounting frame (6).

3. A steel grating welding positioning device according to claim 1, characterized in that The positioning member (3) comprises a U-shaped support seat (31) arranged between two adjacent adjustment slots (12) along a direction parallel to the length of the bottom flat steel, and a fixing block (32) relatively arranged on two side walls inside the support seat (31); the support seat (31) is arranged to avoid the bottom flat steel, and guide surfaces are arranged on opposite sides of the top ends of the two fixing blocks (32).

4. A steel grating welding positioning device according to claim 3, characterized in that Each of the fixed blocks (32) is provided with a sliding rod (321) on one side facing the inner wall of the support seat (31); the length direction of the sliding rod (321) is parallel to the direction of relative sliding of the two fixed blocks (32); the sliding rod (321) slides through the corresponding side wall of the support seat (31), and an end block (322) is provided on the end of the sliding rod (321) that penetrates the side wall of the support seat (31); a spring (9) is sleeved on the rod body of the sliding rod (321) extending out of the support seat (31); the spring (9) abuts against the corresponding end block (322) and the opposite side wall of the support seat (31); when the spring (9) is in a natural state, the two fixed blocks (32) are fitted together.

5. A steel grating welding positioning device according to claim 1, characterized in that The positioning block (4) is provided on the outer wall at each of the four right angles corresponding to the frame (011), and each positioning block (4) is provided with a chamfer on the inner wall at the top end facing the frame (011).

6. A steel grating welding positioning device according to claim 5, characterized in that A plurality of plug-in rods (41) are arranged on the bottom wall of each positioning block (4), each of the plug-in rods (41) is arranged vertically, and a plug-in through hole (11) for inserting the plug-in rod (41) is opened on the workbench (1), and a plurality of the plug-in through holes (11) are arranged on the workbench (1) corresponding to the frame (011) of different sizes.

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