A welding tool and process for steel structure machining with positioning function

Abstract

This invention belongs to the field of welding fixture technology, and specifically relates to a welding fixture and process for steel structure processing with positioning function. The invention includes a fixture support column, an electrically driven rotating rod installed inside the fixture support column, and a detachable bearing frame connected to one side of the electrically driven rotating rod. It also includes: clamping arms positioned below the steel frame beam, with a contact portion abutting against a measuring surface; multiple clamping arms are centrally mounted on a clamping base plate, which has a top protrusion plate. The multiple clamping arms on the top protrusion plate support frame beams of different sizes and shapes through an angle adjustment structure. By setting three sets of independently adjustable clamping arms with adjustable angles and extension lengths, and in conjunction with V-shaped clamping triangular plates, this invention can adaptively fit and support different cross-sectional shapes (such as circular, rectangular, triangular, and prismatic) of the central beam of the steel structure frame, significantly improving the adaptability and support stability for central beams of different shapes.

Description

Technical Field

[0001] This invention relates to the field of welding fixture technology, specifically to a welding fixture and process for steel structure processing with positioning function. Background Technology

[0002] In the field of steel structure fabrication and manufacturing, welding is one of the most important and critical processes for connecting steel components. For steel frame structures, especially those with central members (or main beams or main support members), double-sided welding is usually required to ensure weld strength and structural symmetry. Currently, to improve welding efficiency and automation, many welding fixtures integrate a flipping function. During operation, the operator first places the steel frame in a detachable support frame, uses a pneumatic clamping assembly to press its edges together, and then activates an electrically driven rotating rod to rotate the support turntable and the entire detachable support frame 180°, so that the other side of the steel frame faces upwards. Then, a welding robot (or manual welding gun) positioned on one side of the fixture's support column completes the double-sided welding. This flipping welding fixture reduces the labor intensity and safety risks associated with manual flipping to a certain extent, and improves welding continuity.

[0003] Then, for the central members of the steel frame (i.e., the longitudinal or transverse main members located in the middle of the frame), most existing fixtures use simple flat plate structures for bottom support. The flat plate support surface is planar, which can only fit the central member with a rectangular cross-section well. However, in actual engineering, the cross-sectional shape of the central member is very diverse, including circular tubes, rectangular tubes, triangular tubes, prismatic tubes, and even irregular cross-sections. The flat plate support surface and the surface of the above-mentioned members are in line contact or point contact, with a small contact area and poor support stability. During the welding process, it is easy to cause shaking or displacement, which directly affects the welding accuracy and forming quality.

[0004] Therefore, we propose a welding fixture and process for steel structure processing with positioning function to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a welding fixture and process for steel structure processing with positioning function. This solves the problem mentioned in the background art: in actual engineering, the cross-sectional shape of the central rod is diverse, commonly including circular tubes, rectangular tubes, triangular tubes, prismatic tubes, and even irregular cross-sections. The flat plate support surface and the surface of the rod are in line contact or point contact, resulting in a small contact area, poor support stability, and easy shaking or displacement during welding, which directly affects welding accuracy and forming quality.

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution: A welding fixture and process for steel structure processing with positioning function includes a fixture support column, an electrically driven rotating rod installed inside the fixture support column, and a detachable load-bearing frame connected to one side of the electrically driven rotating rod. Also includes: The clamping arm is located below the steel frame beam, and the clamping arm has a contact part that abuts against the measuring surface; Multiple clamping arms are centrally mounted on the clamping base plate, which has a top protrusion plate. The multiple clamping arms support frame beams of different sizes and shapes through an angle adjustment structure on the top protrusion plate.

[0007] Furthermore, one side of the tooling support column is provided with a load-bearing turntable that is connected to the front end of the electric drive rotating rod and is driven to rotate by the electric drive rotating rod; A support plate is fixed to the surface of the turntable, and a top pressure plate is pressed on the top of the detachable load-bearing frame above the support plate; The support plate has an inner groove, and an inner groove slider slides longitudinally within the groove. The bottom of the top pressure plate is fixedly connected to the inner groove slider. The bottom end of the inner groove longitudinal slider is fixed with a slider locking screw that extends downward through the support plate and can be fitted with a nut.

[0008] Furthermore, a position adjustment groove is provided on the detachable support frame, and an adjustment base plate is installed on the top of the detachable support frame; a translation support plate is fixed at the bottom of the adjustment base plate; The bottom of the adjusting base plate is fixed with a slider that interacts with the position adjusting groove. The top of the adjusting base plate is provided with a sliding groove, on which a translational bearing plate slides. The bottom of the adjusting base plate is provided with a locking screw and a matching threaded seat for locking the relative position of the translational bearing plate and the adjusting base plate. The top of the translational bearing plate is fixed with a pneumatic clamping assembly for pressing the top edge of the steel structure.

[0009] Furthermore, an inwardly extending inner plate is fixed to the inner wall of the detachable support frame, and an adjusting groove is provided on the surface of the inner plate. A long strip carrier plate is installed on the inner side of the detachable support frame, and the two ends of the long strip carrier plate are embedded and slidably connected in the groove of the adjusting groove. The top of the inner extension plate is provided with threaded positioning holes with a spacing, and the top of both ends of the long strip carrier plate are fitted with locking plates adapted to the threaded positioning holes.

[0010] Furthermore, the fitting part includes a through-hole, a locking screw, a rotating rod, and a clamping triangular plate. The through-hole is opened on the surface of the clamping arm, the locking screw passes through the hole of the through-hole, the rotating rod is rotatably connected to one end of the locking screw, and the clamping triangular plate is fixed to the other end of the rotating rod. The end of the locking screw protrudes outward through the through-hole to accommodate a nut; The surface of the clamping arm is provided with a fan-shaped limiting groove that communicates with the through-hole slot, and the outer wall of the rotating rod is fixed with a limiting protrusion that is attached to the fan-shaped limiting groove and moves in an arc.

[0011] Furthermore, the angle adjustment structure includes a multi-faceted insertion hole, a circular rotating hole, a clamping arm, a circular insert, a multi-faceted locking rod, a rod connecting plate, a connecting plate threaded seat, and a locking horizontal screw. The top protrusion is opened in the multi-faceted insertion hole, and the surface of the top protrusion has a circular rotating hole that communicates with the multi-faceted insertion hole and is larger in size than the multi-faceted insertion hole. A circular insert is fixed on one side of the bottom of the clamping arm and can be rotatably embedded in the circular rotating hole. The hole of the circular insert is adapted to the multi-faceted insertion hole. The surface of the clamping arm also has a mating rotating hole that is the same as the circular rotating hole. The multi-faceted locking rod is inserted into the multi-faceted insertion hole and the circular insertion cylinder, and the rod connecting plate is fixed to the end of the multi-faceted locking rod; the surface of the rod connecting plate is provided with a connecting plate thread seat; The locking horizontal screw is screwed into the hole of the threaded seat of the connecting plate, and the side of the clamping seat plate has an insertion hole that is compatible with the front end of the locking horizontal screw.

[0012] Furthermore, clamping side plates are provided on both sides of the clamping base plate, and longitudinal limiting grooves are provided on the inner walls of the clamping side plates. Slider blocks that slide longitudinally along the longitudinal limiting grooves are fixed at both ends of the clamping base plate. The bottom of the clamping base plate is fixed with a height adjustment ramp; the inner wall of the clamping side plate has a crossbeam, and a self-locking adjustment screw is installed on the crossbeam. The front end of the self-locking adjustment screw is equipped with a spherical part that can abut against the inclined surface of the height adjustment ramp.

[0013] Furthermore, a bending support plate is installed on the clamping base plate, a sleeve column is fixed on the top of the bending support plate, a drive motor is installed on the surface of the bending support plate, and the output end of the drive motor is connected to the pressing screw sleeved in the hole of the sleeve column. A screw sleeve is sleeved on the outside of the pressing screw, and a synchronous collar is sleeved on the upper and lower sides of the screw sleeve. A downward pressing connecting rod is fixed on the surface of the synchronous collar. The surface of the sleeve column is provided with a guide groove that allows the pressing connecting rod to pass through, and the surface of the sleeve column is also provided with a guide groove that communicates with the top of the guide groove. The front end of the pressure link is fixed with a pressure cross plate. An embedded threaded cylinder is installed in the bottom groove of the pressure cross plate. The bottom of the embedded threaded cylinder is screwed into a pressure threaded assembly that abuts against the top of the frame beam.

[0014] Furthermore, a transverse limiting groove is provided on the surface of the clamping base plate, and a transverse displacement slide block that slides along the transverse limiting groove is fixed at the bottom of the bent support plate. The front end of the lateral displacement slide is fixed with a positioning side contact plate that extends into the cavity of the clamping seat plate. The front end of the locking horizontal screw passes through the threaded seat of the connecting plate and the insertion hole on the surface of the clamping seat plate and can abut against the surface of the positioning side contact plate to lock the position of the through insertion hole and the bending tray.

[0015] A welding process for steel structure fabrication with positioning function, performed by a welding fixture for steel structure fabrication with positioning function, includes the following steps: S1. According to the cross-sectional shape (circular, rectangular, triangular, prismatic, etc.) and size of the central bar of the steel structure frame to be welded, adjust the extension length of the three sets of clamping arms, and adjust the included angle of the clamping arms on both sides by rotating the circular insert in the circular rotating hole and the docking rotating hole, so that the three sets of clamping arms are distributed in a triangular claw shape. Then, insert the multi-faceted locking rod into the multi-faceted hole and multi-faceted insertion hole in the three sets of circular inserts at the same time, and lock the angle position of the three sets of clamping arms simultaneously. S2. The rotating self-locking adjusting screw uses the ball structure at its front end to push the inclined surface of the height adjusting slant plate, thereby adjusting the height of the clamping seat plate in the longitudinal limiting groove, so that the V-shaped surface of the clamping triangle plate can fit against the surface of the center rod. At the same time, through the arc movement of the limiting protrusion in the fan-shaped limiting groove, the clamping triangle plate adaptively adjusts the angle to ensure full contact with the surface of the center rod. S3. Place the center rod of the steel structure frame on the clamping triangle plate at the top of the three sets of clamping arms. At this time, the pressing connecting rod is located in the guide groove, and the pressing horizontal plate is located on one side of the center rod placement position. After the center rod is in place, start the drive motor to drive the pressing screw to rotate, so that the screw sleeve and synchronous collar move longitudinally, driving the pressing connecting rod from the guide groove into the guide vertical groove. The pressing horizontal plate moves to the top of the center rod and presses down. Two sets of spaced pressing threaded assemblies form two pressing clamping points from both sides of the top of the center rod. Tighten the pressing threaded assemblies to press the lower spherical structure against the surface of the center rod. S4. By sliding the lateral bearing plate in the groove at the top of the adjusting base plate, adjust the position of the pneumatic clamping component and start the pneumatic clamping component to clamp the top of the steel structure edge; then start the electric drive rotating rod to drive the bearing turntable and the detachable bearing frame to flip as a whole, so that the other side of the steel structure frame faces upward, and cooperate with the welding robot on one side of the tooling support column to complete the double-sided welding.

[0016] Compared with the prior art, the present invention provides a welding fixture and process for steel structure processing with positioning function, which has the following beneficial effects: This invention, by setting up three sets of clamping arms with independently adjustable angles and telescopic lengths, and in conjunction with V-shaped clamping triangle plates, can adaptively fit and support the central bar of the steel structure frame according to different cross-sectional shapes (such as circular, rectangular, triangular, and prismatic shapes), significantly improving the adaptability and support stability of central bars of different shapes.

[0017] This invention achieves synchronous angle locking of three sets of clamping arms by simultaneously inserting a multi-faceted locking rod into three sets of circular inserts and multi-faceted insert holes. The operation is simple and the locking is reliable. The top is equipped with a sleeve column, a pressing screw, and a pressing structure driven by a drive motor. The cooperation of the guide groove and the guide vertical groove allows the pressing horizontal plate to be moved to one side when the center rod is placed, which facilitates quick placement. When pressing down, it automatically moves to the top of the center rod. The two sets of spaced pressing thread assemblies form a double-point clamping, and the clamping force is evenly distributed, which effectively prevents the center rod from deforming or loosening. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an enlarged view of the clamping side plate of the present invention; Figure 3 This is a schematic diagram of the structure of the rotating disk supporting the present invention; Figure 4 This is a cross-sectional view of the support plate of the present invention; Figure 5 This is a diagram showing the separation of the translational support plate and the detachable support frame of the present invention. Figure 6 This is a cross-sectional view of the position adjustment groove of the present invention; Figure 7 This is a schematic diagram of the structure at the inner extension plate of the present invention; Figure 8 This is a split view of the top protrusion plate and the clamping arm of the present invention; Figure 9 This is a schematic diagram of the structure at the circular rotating hole of the present invention; Figure 10 This is an exploded view of the clamping triangular plate and locking screw of the present invention; Figure 11 This is a schematic diagram of the structure of the self-locking adjusting screw of the present invention; Figure 12 This is a schematic diagram of the structure at the positioning side contact plate of the present invention; Figure 13 This is a schematic diagram of the structure at the sleeve column of the present invention.

[0019] Figure 14 This is a bottom view of the pressing horizontal plate of the present invention.

[0020] In the diagram: 1. Tooling support column; 2. Electrically driven rotating rod; 3. Bearing turntable; 4. Support plate; 5. Inner groove of the plate; 6. Inner groove longitudinal slider; 7. Slider locking screw; 8. Top pressure plate; 9. Detachable bearing frame; 10. Translation bearing plate; 11. Position adjustment groove; 111. Pneumatic clamping assembly; 12. Adjusting base plate; 13. Locking screw part; 14. Inner extension plate; 15. Long strip carrier plate; 16. Adjusting waist groove; 17. Locking plate; 18. Clamping seat plate; 19. Top protrusion plate; 20. Multi-faceted insertion hole; 21. Circular rotating hole; 22. Clamping arm; 23. Circular insertion cylinder; 231. Butt joint rotating hole; 24. Multi-faceted locking rod; 25. Rod connecting plate; 26. Connection 27. Threaded plate seat; 28. Through-hole; 29. ​​Fan-shaped limiting groove; 30. Locking screw; 31. Rotating rod; 32. Limiting protrusion; 33. Clamping triangular plate; 34. Clamping side plate; 35. Longitudinal limiting groove; 36. Height adjusting ramp; 37. Self-locking adjusting screw; 38. Lateral limiting slide; 39. Lateral displacement slide; 40. Bending support plate; 41. Positioning side contact plate; 42. Locking horizontal screw part; 43. Pressing screw; 44. Drive motor; 45. Sleeve column; 46. Screw sleeve; 47. Synchronous collar; 48. Downward pressing connecting rod; 49. Guide vertical groove; 50. Guide inclined groove; 51. Downward pressing horizontal plate; 52. Embedded threaded cylinder; 53. Downward pressing thread assembly. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0022] like Figure 1-14As shown in the figure, an embodiment of the present invention provides a welding fixture and process for steel structure processing with positioning function, including a fixture support column 1. An electrically driven rotating rod 2 is installed inside the fixture support column 1, and a detachable bearing frame 9 is connected to one side of the electrically driven rotating rod 2. A bearing turntable 3 is provided on one side of the fixture support column 1 and is connected to the front end of the electrically driven rotating rod 2. The bearing turntable 3 is driven to rotate by the electrically driven rotating rod 2. A support plate 4 is fixed on the surface of the bearing turntable 3, and a top pressure plate 8 is provided above the support plate 4, which presses against the top of the detachable bearing frame 9. An inner groove 5 is opened inside the support plate 4, and an inner groove longitudinal slider 6 is longitudinally slidably arranged in the groove of the inner groove 5. The bottom of the top pressure plate 8 is fixedly connected to the inner groove longitudinal slider 6. The bottom end of the inner groove longitudinal slider 6 is fixed with a slider locking screw 7 that extends downward through the support plate 4 and can be fitted with a nut. By tightening the nut, the position of the inner groove longitudinal slider 6 can be locked, thereby fixing the pressing state of the top pressure plate 8 on the detachable bearing frame 9.

[0023] A position adjustment groove 11 is provided on the detachable support frame 9. An adjustment base plate 12 is installed on the top of the detachable support frame 9, and a translational support plate 10 is fixed to the bottom of the adjustment base plate 12. A slider is also fixed to the bottom of the adjustment base plate 12, and the slider interacts within the groove of the position adjustment groove 11. A sliding groove is provided on the top of the adjustment base plate 12, and the translational support plate 10 is slidably mounted on the sliding groove. A locking screw part 13 and a matching threaded seat are provided on the bottom of the adjustment base plate 12 for locking the relative position of the translational support plate 10 and the adjustment base plate 12. A pneumatic clamping assembly 111 is fixed to the top of the translational support plate 10 for clamping the top edge of the steel structure. With the above structure, the edge clamping and positioning of steel structures of different sizes can be achieved.

[0024] An inwardly extending inner plate 14 is fixed to the inner wall of the detachable support frame 9, and an adjusting groove 16 is formed on the surface of the inner plate 14. A long strip support plate 15 is installed inside the detachable support frame 9, and both ends of the long strip support plate 15 are embedded and slidably connected in the groove of the adjusting groove 16. The top of the inner plate 14 is provided with threaded positioning holes with distributed spacing, and locking plates 17 adapted to the threaded positioning holes are installed on the top of both ends of the long strip support plate 15. The long strip support plate 15 can be fixed in different positions by means of the locking plates 17, thereby adapting to steel structure frames of different widths.

[0025] A clamping side plate 33 is mounted on the long strip carrier plate 15. This clamping side plate 33 has an H-shaped structure, with its bottom fitted onto the long strip carrier plate 15. It can move laterally on the long strip carrier plate 15, thereby adjusting the position of the entire upper structure. Threaded holes are provided on the side of the clamping side plate 33. Bolts are passed through and tightened to lock the relative position of the clamping side plate 33 and the long strip carrier plate 15. A longitudinal limiting groove 34 is provided on the inner wall of the clamping side plate 33. Slider blocks are fixed at both ends of the clamping base plate 18, and these sliders slide longitudinally within the groove of the longitudinal limiting groove 34. A height adjusting ramp 35 is fixed to the bottom of the clamping base plate 18. A crossbeam is also provided on the inner wall of the clamping side plate 33. A self-locking adjusting screw 36 is mounted on the crossbeam. A spherical structure is installed at the front end of the self-locking adjusting screw 36, and this spherical structure abuts against the inclined surface of the height adjusting ramp 35. By rotating the self-locking adjusting screw 36, the spherical structure at the front end of the screw is driven to push the inclined plane, thereby adjusting the height of the clamping base plate 18 and realizing the height adjustment of the clamping point.

[0026] A top protrusion plate 19 is provided on the clamping base plate 18, and multiple sets of clamping arms 22 are installed on the top protrusion plate 19. These clamping arms 22 are used to support the central rod of the steel structure frame from the bottom. Specifically, the three sets of clamping arms 22 are arranged in a triangular claw structure, with the middle set of clamping arms 22 being shorter and the two sets of clamping arms 22 on both sides being longer. The three sets of clamping arms 22 together support the central rod upward. Each set of clamping arms 22 is a telescopic rod structure, using existing common telescopic rod technology to achieve length adjustment, which can adjust the extension length according to the cross-sectional shape and size of the central rod. The top of the clamping arm 22 is provided with a fitting part, which includes a through-hole 27, a locking screw 29, a rotating rod 30, and a clamping triangular plate 32. The through-hole 27 is opened on the surface of the clamping arm 22, the locking screw 29 passes through the hole of the through-hole 27, the rotating rod 30 is rotatably connected to one end of the locking screw 29, and the clamping triangular plate 32 is fixed to the other end of the rotating rod 30. The end of the locking screw 29 protrudes outward through the through-hole 27 and can be fitted with a nut for locking. The surface of the clamping arm 22 is also provided with a fan-shaped limiting groove 28 that communicates with the through-hole 27. A limiting protrusion 31 is fixed to the outer wall of the rotating rod 30. This limiting protrusion 31 fits into the groove of the fan-shaped limiting groove 28 and moves in an arc, thus giving the clamping triangle 32 a certain degree of adaptive angle adjustment capability. The clamping triangle 32 adopts a V-shaped structure, which can better fit the surface of the center rod of different shapes such as circles, triangles, and rhombuses, improving support stability and adaptability.

[0027] To achieve angle adjustment and synchronous locking of the three sets of clamping arms 22, the present invention provides an angle adjustment structure at the top protrusion plate 19. Specifically, the top protrusion plate 19 is formed within the polygonal insertion hole 20, and the surface of the top protrusion plate 19 has a circular rotating hole 21 that communicates with the polygonal insertion hole 20 and is larger in size than the polygonal insertion hole 20. A circular insert 23 is fixed to one side of the bottom of the clamping arm 22, and the circular insert 23 is rotatably embedded in the hole of the circular rotating hole 21. The shape of the hole of the circular insert 23 is adapted to the polygonal insertion hole 20. The surface of the clamping arm 22 also has a mating rotating hole 231 that is the same as the circular rotating hole 21. The three sets of clamping arms 22 are respectively inserted into the corresponding circular rotating hole 21 and mating rotating hole 231 through their respective circular inserts 23, so as to achieve mutual rotational connection. The polygonal locking rod 24 is simultaneously inserted into the polygonal holes in the three sets of circular inserts 23 and the polygonal insertion hole 20, thereby synchronously locking the angle position of the three sets of clamping arms 22. The end of the multi-faceted locking rod 24 is fixed with a rod connecting plate 25, and the surface of the rod connecting plate 25 is provided with a connecting plate thread seat 26. The locking horizontal screw part 41 is screwed into the hole of the connecting plate thread seat 26, and the side of the clamping seat plate 18 is provided with an insertion hole that is adapted to the insertion of the front end of the locking horizontal screw part 41. When the multi-faceted locking rod 24 is inserted to the end, the front end of the locking horizontal screw part 41 passes through the connecting plate thread seat 26 and the insertion hole on the surface of the clamping seat plate 18, and presses against the surface of the positioning side contact plate 40. This surface is a high-friction area, thereby pressing the positioning side contact plate 40, locking the lateral displacement slide 38 in the lateral limiting slide groove 37, and thus locking the position of the entire sleeve column 44.

[0028] A transverse limiting groove 37 is formed on the surface of the clamping base plate 18, and a transverse displacement slide 38 is fixed to the bottom of the bent support plate 39. The transverse displacement slide 38 slides along the groove of the transverse limiting groove 37. A positioning side contact plate 40 is fixed to the front end of the transverse displacement slide 38. The positioning side contact plate 40 extends into the cavity of the clamping base plate 18 and is used to cooperate with the locking horizontal screw part 41 to achieve position locking.

[0029] A sleeve column 44, which is a hollow cylindrical structure, is fixed to the top of the bending support plate 39. A drive motor 43 is mounted on the surface of the bending support plate 39, and the output end of the drive motor 43 is connected to a pressing screw 42, which is sleeved in the hole of the sleeve column 44. A screw sleeve 45 is sleeved on the outside of the pressing screw 42, and a synchronous collar 46 is sleeved on the upper and lower sides of the screw sleeve 45. A downward pressing connecting rod 47 is fixed to the surface of the synchronous collar 46. When the drive motor 43 drives the pressing screw 42 to rotate, the screw sleeve 45 moves longitudinally along the axis of the pressing screw 42, and the synchronous collar 46 moves longitudinally together with the screw sleeve 45. A guide vertical groove 48 and a guide inclined groove 49 are formed on the surface of the sleeve column 44, wherein the guide inclined groove 49 communicates with the top of the guide vertical groove 48. In the initial state, the pressing link 47 is located within the guide groove 49, and the pressing cross plate 50 is positioned on one side of the center rod placement location, facilitating the quick placement of the center rod of the steel structure frame onto the top of the three sets of clamping arms 22. After the pressing link 47 moves from the guide groove 49 into the guide vertical groove 48, it moves longitudinally along the guide vertical groove 48, causing the pressing cross plate 50 to press down. An embedded threaded cylinder 51 is installed in the bottom groove of the pressing cross plate 50, and a pressing threaded assembly 52 is screwed into the bottom of the embedded threaded cylinder 51. The upper part of the pressing threaded assembly 52 is a screw, and the lower part is a spherical structure. Two sets of embedded threaded cylinders 51 and pressing threaded assemblies 52 are spaced apart, forming two pressing clamping points on both sides of the upper part of the center rod, thereby more stably pressing the top of the center rod.

[0030] In use, firstly, based on the cross-sectional shape and dimensions of the central rod of the steel frame to be welded (circular, rectangular, triangular, prismatic, etc.), adjust the extension length of the three sets of clamping arms 22. Then, by rotating the circular insert 23 within the circular rotating hole 21 and the mating rotating hole 231, adjust the included angle of the clamping arms 22 on both sides, so that the three sets of clamping arms 22 are distributed in a triangular claw shape. Next, simultaneously insert the multi-faceted locking rod 24 into the multi-faceted holes and multi-faceted insertion holes 20 within the three sets of circular inserts 23, synchronously locking the angular positions of the three sets of clamping arms 22. Then, rotate the self-locking adjusting screw 36, using its spherical structure at the front end to push the inclined surface of the height adjusting ramp 35, thereby adjusting the height of the clamping seat plate 18 within the longitudinal limiting groove 34, so that the V-shaped surface of the clamping triangular plate 32 can fit against the surface of the central rod. Simultaneously, through the arc-shaped movement of the limiting protrusion 31 within the fan-shaped limiting groove 28, the clamping triangular plate 32 adaptively adjusts its angle, ensuring full contact with the surface of the central rod. Then, the central rod of the steel structure frame is placed on the clamping triangle plate 32 at the top of the three sets of clamping arms 22. At this time, the pressing connecting rod 47 is located in the guide inclined groove 49, and the pressing horizontal plate 50 is located on one side of the central rod placement position, which facilitates the quick positioning of the central rod. After the central rod is placed stably, the drive motor 43 is started to drive the pressing screw 42 to rotate, so that the screw sleeve 45 and the synchronous collar 46 move longitudinally, driving the pressing connecting rod 47 from the guide inclined groove 49 into the guide vertical groove 48. The pressing horizontal plate 50 moves to directly above the central rod and presses down; two sets of spaced pressing threaded assemblies 52 form two pressing clamping points from both sides of the top of the central rod. Tightening the pressing threaded assemblies 52 makes the lower spherical structure press against the surface of the central rod. Finally, by sliding the translational bearing plate 10 in the groove at the top of the adjusting base plate 12, the position of the pneumatic clamping assembly 111 is adjusted, and the pneumatic clamping assembly 111 is activated to clamp the top of the steel structure edge; then the electric drive rotating rod 2 is activated, which drives the bearing turntable 3 and the detachable bearing frame 9 to rotate as a whole, so that the other side of the steel structure frame faces upward, and the welding robot on one side of the tooling support column 1 completes double-sided welding.

[0031] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding fixture and process for steel structure processing with positioning function, comprising a fixture support column (1), an electric drive rotating rod (2) installed inside the fixture support column (1), and a detachable bearing frame (9) connected to one side of the electric drive rotating rod (2). Its features are, Also includes: The clamping arm (22) is located below the steel frame beam, and the clamping arm (22) has a fitting part that abuts against the measuring surface; Multiple clamping arms (22) are centrally mounted on the clamping base plate (18). A top protrusion plate (19) is provided on the clamping base plate (18). The multiple clamping arms (22) support frame beams of different sizes and shapes on the top protrusion plate (19) through an angle adjustment structure.

2. The welding fixture for steel structure processing with positioning function according to claim 1, characterized in that: The tooling support column (1) has a bearing turntable (3) on one side that is connected to the front end of the electric drive rotating rod (2) and driven to rotate by the electric drive rotating rod (2). A support plate (4) is fixed on the surface of the carrier turntable (3), and a top pressure plate (8) is pressed on the top of the detachable carrier frame (9) above the support plate (4). The support plate (4) has an inner groove (5) and an inner groove slide block (6) slides longitudinally in the groove (5). The bottom of the top plate (8) is fixedly connected to the inner groove slide block (6). The bottom end of the inner groove longitudinal slider (6) is fixed with a slider locking screw (7) that extends downward through the support plate (4) and can be fitted with a nut.

3. The welding fixture for steel structure processing with positioning function according to claim 1, characterized in that: The detachable support frame (9) is provided with a position adjustment groove (11), and an adjustment base plate (12) is installed on the top of the detachable support frame (9); a translation support plate (10) is fixed at the bottom of the adjustment base plate (12). The bottom of the adjusting base plate (12) is fixed with a slider that interacts with the position adjusting groove (11); The top of the adjusting base plate (12) is provided with a sliding groove, on which a translational bearing plate (10) slides. The bottom of the adjusting base plate (12) is provided with a locking screw (13) for locking the relative position of the translational bearing plate (10) and the adjusting base plate (12) and a matching threaded seat. The top of the translational bearing plate (10) is fixed with a pneumatic pressing assembly (111) for pressing the top edge of the steel structure.

4. The welding fixture for steel structure processing with positioning function according to claim 1, characterized in that: The inner wall of the detachable support frame (9) is fixed with an inwardly extending inner plate (14), and the surface of the inner plate (14) is provided with an adjustment groove (16). A long strip plate (15) is installed on the inner side of the detachable support frame (9), and the two ends of the long strip plate (15) are embedded and slidably connected in the groove of the adjustment groove (16). The top of the inner extension plate (14) is provided with threaded positioning holes with a spacing distribution, and the top of both ends of the long strip plate (15) are fitted with locking plates (17) that are adapted to the threaded positioning holes.

5. The welding fixture for steel structure processing with positioning function according to claim 1, characterized in that: The fitting part includes a through-hole (27), a locking screw (29), a rotating rod (30), and a clamping triangle plate (32). The through-hole (27) is opened on the surface of the clamping arm (22), the locking screw (29) passes through the hole of the through-hole (27), the rotating rod (30) is rotatably connected to one end of the locking screw (29), and the clamping triangle plate (32) is fixed to the other end of the rotating rod (30). The end of the locking screw (29) protrudes outward through the through-hole (27) to accommodate the nut; The surface of the clamping arm (22) is provided with a fan-shaped limiting groove (28) that communicates with the through-hole (27) groove, and the outer wall of the rotating rod (30) is fixed with a limiting protrusion (31) that is attached to the fan-shaped limiting groove (28) for arc-shaped movement.

6. The welding fixture for steel structure processing with positioning function according to claim 1, characterized in that: The angle adjustment structure includes a multi-faceted insertion hole (20), a circular rotating hole (21), a clamping arm (22), a circular insert (23), a multi-faceted locking rod (24), a rod connecting plate (25), a connecting plate threaded seat (26), and a locking horizontal screw part (41). The top protrusion plate (19) is opened in the multi-faceted insertion hole (20), and the surface of the top protrusion plate (19) is provided with a circular rotating hole (21) that communicates with the multi-faceted insertion hole (20) and is larger in size than the multi-faceted insertion hole (20). A circular insert (23) that can be rotatably embedded in the hole of the circular rotating hole (21) is fixed on one side of the bottom of the clamping arm (22). The hole of the circular insert (23) is adapted to the multi-faceted insertion hole (20), and the surface of the clamping arm (22) is also provided with a mating rotating hole (231) that is the same as the circular rotating hole (21). The multi-faceted locking rod (24) is inserted into the multi-faceted insertion hole (20) and the circular insertion tube (23), and the rod connecting plate (25) is fixed at the end of the multi-faceted locking rod (24); the surface of the rod connecting plate (25) is provided with a connecting plate thread seat (26). The locking horizontal screw (41) is screwed into the hole of the connecting plate thread seat (26), and the side of the clamping seat plate (18) is provided with an insertion hole that is compatible with the front end of the locking horizontal screw (41).

7. The welding fixture for steel structure processing with positioning function according to claim 1, characterized in that: The clamping seat plate (18) is provided with clamping side plates (33) on both sides. The inner wall of the clamping side plates (33) is provided with a longitudinal limiting groove (34). The two ends of the clamping seat plate (18) are fixed with sliders that slide longitudinally along the longitudinal limiting groove (34). The bottom of the clamping seat plate (18) is fixed with a height adjustment ramp (35); the inner wall of the clamping side plate (33) has a crossbeam, and a self-locking adjustment screw (36) is installed on the crossbeam. The front end of the self-locking adjustment screw (36) is equipped with a spherical part that can abut against the inclined surface of the height adjustment ramp (35).

8. The welding fixture for steel structure processing with positioning function according to claim 1, characterized in that: A bent support plate (39) is installed on the clamping base plate (18). A sleeve column (44) is fixed on the top of the bent support plate (39). A drive motor (43) is installed on the surface of the bent support plate (39). The output end of the drive motor (43) is connected to the pressing screw (42) sleeved in the hole of the sleeve column (44). A screw sleeve (45) is sleeved on the outside of the pressing screw (42), and a synchronous collar (46) is sleeved on the upper and lower sides of the screw sleeve (45). A downward pressing connecting rod (47) is fixed on the surface of the synchronous collar (46). The surface of the sleeve column (44) is provided with a guide groove (48) that allows the pressing connecting rod (47) to pass through, and the surface of the sleeve column (44) is also provided with a guide groove (49) that communicates with the top of the guide groove (48). The front end of the pressure link (47) is fixed with a pressure cross plate (50), and an embedded threaded cylinder (51) is installed in the bottom groove of the pressure cross plate (50). The bottom of the embedded threaded cylinder (51) is screwed with a pressure threaded assembly (52) that abuts against the top of the frame beam.

9. A welding fixture for steel structure processing with positioning function according to claim 1, characterized in that: The surface of the clamping base plate (18) is provided with a transverse limiting groove (37), and the bottom of the bent support plate (39) is fixed with a transverse displacement slide (38) that slides along the transverse limiting groove (37). The front end of the transverse displacement slide (38) is fixed with a positioning side contact plate (40) that extends into the cavity of the clamping seat plate (18). The front end of the locking horizontal screw (41) passes through the threaded seat of the connecting plate (26) and the insertion hole on the surface of the clamping seat plate (18) and can abut against the surface of the positioning side contact plate (40) to lock the position of the through insertion hole (27) and the bending support plate (39).

10. A welding process for steel structure fabrication with positioning function, characterized in that: The process involves using a welding fixture with positioning function for steel structure fabrication as described in claim 1, comprising the following steps: S1. According to the cross-sectional shape (circular, rectangular, triangular, prismatic, etc.) and size of the central bar of the steel structure frame to be welded, adjust the extension length of the three sets of clamping arms (22), and adjust the included angle of the clamping arms (22) on both sides by rotating the circular insert (23) in the circular rotating hole (21) and the docking rotating hole (231) so that the three sets of clamping arms (22) are distributed in a triangular claw shape. Then, insert the multi-faceted locking rod (24) into the multi-faceted hole and multi-faceted insert (20) in the three sets of circular inserts (23) at the same time to lock the angle position of the three sets of clamping arms (22) simultaneously. S2. Rotate the self-locking adjusting screw (36) and use the ball structure at its front end to push the inclined surface of the height adjusting slant plate (35), thereby adjusting the height of the clamping seat plate (18) in the longitudinal limiting groove (34), so that the V-shaped surface of the clamping triangle plate (32) can fit against the surface of the center rod. At the same time, through the arc movement of the limiting protrusion (31) in the fan-shaped limiting groove (28), the clamping triangle plate (32) adaptively adjusts the angle to ensure full contact with the surface of the center rod. S3. Place the center rod of the steel structure frame on the clamping triangle plate (32) at the top of the three clamping arms (22). At this time, the pressing connecting rod (47) is located in the guide groove (49), and the pressing horizontal plate (50) is located on one side of the center rod placement position. After the center rod is in place, start the drive motor (43) to drive the pressing screw (42) to rotate, so that the screw sleeve (45) and the synchronous collar (46) move longitudinally, and drive the pressing connecting rod (47) from the guide groove (49) into the guide vertical groove (48). The pressing horizontal plate (50) moves to the top of the center rod and presses down. Two sets of spaced pressing thread assemblies (52) form two pressing clamping points from both sides of the top of the center rod. Tighten the pressing thread assembly (52) so that the lower spherical structure presses the surface of the center rod. S4. By sliding the translational bearing plate (10) in the groove at the top of the adjusting base plate (12), adjust the position of the pneumatic clamping assembly (111) and start the pneumatic clamping assembly (111) to clamp the top of the edge of the steel structure; then start the electric drive rotating rod (2) to drive the bearing turntable (3) and the detachable bearing frame (9) to flip as a whole, so that the other side of the steel structure frame faces up, and the welding robot on one side of the tooling support column (1) completes double-sided welding.

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