Arc steel member welding and positioning tool clamp

Abstract

The invention relates to a bent arc steel member welding positioning tool clamp, and belongs to the technical field of welding tools. The limiting device comprises a plurality of limiting plate sets which are used for being installed on the outer side of the bent-arc-shaped I-shaped steel and arranged at intervals in the extending direction of the bent-arc-shaped I-shaped steel, and is characterized in that limiting clamping grooves for the bent-arc-shaped I-shaped steel to be clamped in in a matched mode are formed in the limiting plate sets; the limiting clamping groove is provided with a plurality of groove walls used for being matched with the two outer wall faces of a web plate in the arc-shaped I-shaped steel and the two opposite outer wall faces of the two wing plates, pressing rollers are rotationally installed on all the groove walls, and the rotating axis of each pressing roller is parallel to the corresponding groove wall and perpendicular to the extending direction of the arc-shaped I-shaped steel. The pressing rollers are used for being arranged on the corresponding outer wall faces in the arc-shaped I-shaped steel in a pressing mode, and the limiting plate sets located at the ends can be pushed to slide in the extending direction of the arc-shaped I-shaped steel in the welding process and sequentially drive the follow-up limiting plate sets to slide. According to the invention, the welding efficiency and quality of the curved steel member can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding tooling, in particular to a curved arc steel component welding positioning tooling fixture. BACKGROUND

[0002] As an important structural load-bearing component, curved arc I-beams are widely used in tunnel steel arches, large-span stadium roofs, bridge box beams and other engineering structures due to their good bending resistance and smooth geometric lines. For curved arc I-beams with large plate thickness, small radius of curvature and high precision requirements, tailor welding is the mainstream and reliable manufacturing process.

[0003] Currently, the tailor welding process of curved arc I-beams generally follows the following procedures: first, the steel plates that have been cut and straightened are processed into two wing plates and one web plate that meet the design curvature requirements through cold bending or hot bending processes; then, the three pre-fabricated curved arc components are positioned and assembled on a special assembly platform to form a standard "I" shape in cross section; finally, a specific fixture is used to fix the assembled wing plates and web plate in multiple directions to prevent curvature deviation or distortion caused by thermal deformation during welding, thereby ensuring the geometric accuracy and mechanical properties of the finished product.

[0004] A kind of adjustable artificial assembly platform for arc H-shaped steel welding is disclosed in the patent with the authorization announcement number CN120269275B. The core technical solution of this patent is: including a plurality of vertically arranged positioning clamps, a first slot for positioning the H-shaped steel flange plate is horizontally arranged on the positioning clamp, a second slot for positioning the H-shaped steel web plate is connected to the lower surface of the middle part of the first slot, a centering bolt and a straightening bolt are horizontally arranged on one side of the second slot, the centering bolt is located above the straightening bolt, both the centering bolt and the straightening bolt are threadedly connected with a plurality of nuts, the nuts are fixedly connected with one side of the positioning clamp, two pads are arranged on the side of the second slot away from the nuts, both pads are fixedly connected with the positioning clamp, and both pads are used to act on the H-shaped steel web plate together with the centering bolt and the straightening bolt to make the H-shaped steel web plate perpendicular to the positioning clamp.

[0005] In the above technical solution, in order to ensure the positioning accuracy of the curved arc I-beam during tailor welding, multiple fixtures are fixedly installed on the outer side of the wing plate and the web plate and are arranged at certain intervals along the extension direction of the I-beam. Although this arrangement can mechanically constrain the component from multiple points and ensure the firm and reliable relative position between the wing plate and the web plate, it has many limitations in actual welding operations.

[0006] Firstly, because the position of the clamp is fixed and directly covers the surface of the component, it just shields the area that needs to be welded at the junction of the wing plate and the web. When welding, the operator can only weld the unshielded section between adjacent clamps first. After the exposed area is completed, the clamps must be removed or moved before the shielded part can be welded again. This segmented and discontinuous welding process not only disrupts the smoothness of the welding operation, but also increases the additional process and working hours, resulting in a significant reduction in overall welding efficiency.

[0007] Secondly, the clamping action of the clamp is only limited to the limited area near its installation position, and in the interval between the two adjacent clamps, there is a lack of sufficient pressure between the wing plate and the web, which is easy to produce a slight gap due to the rebound or thermal deformation of the steel plate itself, resulting in insufficient tightness. This local poor fitting problem will directly affect the formation and filling effect of the molten pool during subsequent welding. More importantly, due to the need to deliberately avoid the position of the clamp during welding, the originally continuous and complete weld is forced to be interrupted, forming several breakpoints. The discontinuity of the weld not only destroys the integrity of the weld, but also easily produces stress concentration or welding defects at the start and end of the arc, thereby reducing the mechanical properties and sealing quality of the weld. This clamp arrangement method ensures the reliability of positioning, but at the cost of the continuity of welding and the integrity of the weld, which adversely affects the welding quality and production efficiency. SUMMARY

[0008] The present application provides a kind of arc steel component welding positioning tool clamp to solve the technical problems that the welding positioning clamp of the arc-shaped I-beam in prior art will affect welding efficiency and welding quality when in use.

[0009] To solve the above problems, the arc steel component welding positioning tool clamp provided by the present application adopts the following technical scheme: A kind of arc steel component welding positioning tool clamp, comprising a plurality of limit plate groups, a plurality of limit plate groups are used to be installed on the outer side of arc-shaped I-beam and are arranged at intervals along the extension direction of arc-shaped I-beam, limit plate group is provided with limit slot for arc-shaped I-beam to adapt to carding, limit slot has a plurality of groove walls for cooperating with two outer wall surfaces of web and two opposite outer wall surfaces of two wing plates in arc-shaped I-beam, each groove wall is rotatably installed with a compression roller, the rotation axis of each compression roller is parallel to the corresponding groove wall and perpendicular to the extension direction of arc-shaped I-beam, the compression roller is used to press on the corresponding outer wall surface of arc-shaped I-beam, the limit plate group located at the end can be pushed to slide along the extension direction of arc-shaped I-beam during welding, and sequentially drive the subsequent limit plate group to slide.

[0010] The technical scheme is adopted, a plurality of limiting plate groups with limiting clamping grooves are arranged, and a pressing roller is rotatably arranged on the groove wall, so that the clamp can form multi-point positioning on the wing plate and the web of the curved arc I-shaped steel, and the limiting plate group can slide along the extension direction of the workpiece under the action of external force due to the rolling characteristics of the pressing roller. The slidable design solves the problem of shielding the welding area of the traditional fixed clamp. When the welding equipment moves to the limiting plate group, the limiting plate group can be pushed away, thereby leaving the welding area of the wing plate and the web, realizing continuous welding of the whole weld, without the need for secondary repair welding, and improving the welding efficiency and welding quality.

[0011] After the welding equipment moves to the limiting plate group, the limiting plate group can be pushed forward to keep synchronization with the welding equipment, so that the welding equipment is always located near the limiting plate group. The moving limiting plate group continuously corrects the curved arc I-shaped steel member, and the area near the welding area is always clamped by the limiting plate group, avoiding the gap between the wing plate and the web affecting the welding quality.

[0012] As the welding equipment continuously feeds, the area of the curved arc I-shaped steel that has completed welding becomes larger, which means that the front section of the curved arc I-shaped steel becomes more and more firm, and the force required for the deformation of the rear section of the curved arc I-shaped steel that has not completed welding becomes larger. Since the limiting plate group slides on the curved arc I-shaped steel, more and more limiting plate groups are accumulated, and the multiple limiting plate groups can exert greater clamping force on the rear section of the curved arc I-shaped steel, ensuring that the wing plate and the web can be tightly attached, and further improving the welding quality. After welding is completed, all limiting plate groups are directly pushed out of the curved arc I-shaped steel, without the need for manual disassembly, further improving the production efficiency.

[0013] Further, the limiting plate group comprises two clamping plate units, the two clamping plate units are detachably connected, and the two clamping plate units are arranged on both sides of the web of the curved arc I-shaped steel.

[0014] The technical scheme is adopted, the limiting plate group is arranged as two detachable clamping plate units, and the two clamping plate units are arranged on both sides of the web, which reduces the difficulty of installing the integral clamp on the curved arc I-shaped steel and improves the convenience of use.

[0015] Further, the clamping plate unit comprises a U-shaped plate and an inner clamping plate, the U-shaped plate comprises two parallel end plate segments, the two end plate segments are arranged on both sides of the two wing plates, wing plate pressing rollers are rotatably arranged on the inner sides of the two end plate segments, the wing plate pressing rollers are pressed on the outer wall surfaces of the wing plates, the inner clamping plate is connected to the U-shaped plate and located in the U-shaped groove in the U-shaped plate, and a web pressing roller is rotatably arranged on the inner clamping plate and pressed on the outer wall surface of the web.

[0016] The technical scheme is adopted, the clamping plate unit is combined by the U-shaped plate and the inner clamping plate, the structure is compact and the positioning is accurate. The two end plate sections on the U-shaped plate cooperate with the wing plate compression roller to clamp the opposite outer wall surfaces of the two wing plates from both sides, and the web compression roller on the inner clamping plate is directly pressed on the outer wall surface of the web. This structure realizes the simultaneous compression of the wing plate and the web, ensures that the two key parts are evenly stressed and closely fitted during welding, and provides a reliable positioning basis for high-quality welding.

[0017] Further, the clamping plate unit includes two inner clamping plates, both of which are located in the U-shaped groove in the U-shaped plate and are spaced apart along the groove width direction of the U-shaped groove.

[0018] The technical scheme is adopted, the two spaced-apart inner clamping plates are arranged in the U-shaped groove of the U-shaped plate, which is equivalent to increasing the clamping point of the web, which makes the pressure distribution of the limiting plate group on the web more uniform, and can more effectively prevent the web from deforming or forming a gap with the wing plate under the action of welding stress, especially for webs with a larger width, further improving the stability and reliability of positioning.

[0019] Further, the two clamping plate units in the limiting plate group are staggered along the extension direction of the curved arc I-beam.

[0020] The technical scheme is adopted, the two clamping plate units in the same limiting plate group are staggered along the extension direction of the workpiece, which can make the pressing point positions of the compression rollers on the two clamping plate units on the wing plate and the web staggered. This staggered layout increases the area of the effective clamping area of the limiting plate group in the length direction of the workpiece, making the constraint of the curved arc I-beam more stable, and better adapting to the shape of the curved member compared to increasing the thickness of the limiting plate group to increase the area of the effective clamping area, preventing the workpiece from twisting during welding.

[0021] Further, the two clamping plate units in the limiting plate group are staggered along the extension direction of the curved arc I-beam.

[0022] The technical scheme is adopted, when the two clamping plate units are staggered, the two end plate sections on the same side of the workpiece have an overlap in the width direction of the wing plate, which can be used as a connection area between the two clamping plate units, facilitating the connection of the two clamping plate units. At the same time, this overlapping structure makes the two originally independent clamping plate units spatially related and constrained, forming a more stable overall framework, enhancing the structural strength and torsional resistance of the entire limiting plate group, ensuring that the clamp does not deform or loosen when pushing the slide or bearing welding stress.

[0023] Further, the two clamping plate units in the limiting plate group are provided with a connecting structure therebetween, the connecting structure comprising a connecting plate and two connecting bolts, the connecting plate being transversely arranged in the two end plate segments on the same side of the curved I-beam, and the two connecting bolts being respectively threaded through the two end plate segments and the connecting plate and being screwed on the two end plate segments.

[0024] By the connecting structure comprising the connecting plate and the two connecting bolts, detachable connection between the two clamping plate units is achieved, which is simple and reliable in operation, can ensure stability in the clamped state, and can also strengthen the overlapping area in the end plate segment and enhance the overall strength.

[0025] Further, the two clamping plate units in the limiting plate group can be relatively moved along the width direction of the web of the curved I-beam.

[0026] With the above technical solution, since the two clamping plate units have a spacing, the two clamping plate units in the same limiting plate group can be relatively moved along the width direction of the web, so that when the limiting plate group is driven to move on the curved I-beam, the two clamping plate units can be relatively displaced along the width direction of the web, which can avoid being clamped on the outer side of the workpiece if the web and the wing plate have manufacturing errors and cannot form a perfect arc, thereby ensuring that the limiting plate group can smoothly slide on the outer side of the workpiece.

[0027] Further, the connecting plate is provided with a positioning hole, and the connecting bolt is rotatably arranged in the positioning hole, so that the connecting plate can rotate around the connecting bolt.

[0028] With the above technical solution, by allowing the connecting bolt to be rotatably arranged in the connecting plate, the connecting plate can rotate around the connecting bolt, and the two clamping plate units can be relatively rotated, so that the two clamping plate units can have a certain angle change during installation or adjustment, which can better adapt to the local curvature change of the curved I-beam at the bending position, avoid being clamped or unable to fit due to rigid connection, and improve the adaptability of the tooling to complex curved shapes.

[0029] Further, one of the clamping plate units in the limiting plate group is provided with a plug, and the other clamping plate unit is provided with a plug hole, so that when the limiting plate group is pushed to slide on the curved I-beam, the plug and the plug hole in the adjacent two limiting plate groups can be plugged and matched.

[0030] By adopting the technical scheme, the plug plate and the socket are arranged on the adjacent limiting plate groups in a plug-in cooperation mode, when the limiting plate group at the end is pushed to slide, the limiting plate group can drive the subsequent limiting plate groups to link in sequence through the cooperation of the plug plate and the socket, and the limiting plate groups are connected together, when the welding operation is completed, the multiple limiting plate groups need to be pushed down from the workpiece surface, since the limiting plate groups are connected together through the plug-in structure, the limiting plate groups are synchronously separated from the workpiece and are unloaded as a complete assembly, the design can avoid the problem that the multiple limiting plate groups are scattered and disordered after being separated in the traditional process, the efficiency of on-site cleaning and collection is improved, the operation safety hidden danger caused by scattering is reduced, and great convenience is provided for subsequent centralized storage, circulation transportation and quantity counting.

[0031] The beneficial effect of the welding positioning fixture for the curved arc steel member provided by the application is that: the pressure rollers are rotatably installed on the limiting slot walls of the multiple limiting plate groups, which not only realizes the multi-point stable clamping of the outer wall surfaces of the wing plates and the web plates, but also enables the limiting plate groups to slide along the extension direction of the workpiece, so that all the limiting plate groups can be pushed to one side during welding to expose the welding area completely, thereby realizing continuous welding of the whole welding seam and avoiding the complex process of repair welding caused by fixture blocking, and the welding efficiency is greatly improved. At the same time, the limiting plate groups can move synchronously with the welding equipment, so that the limiting plate groups near the welding area can clamp the wing plates and the web plates to tightly adhere to each other for welding, thereby further improving the welding quality. In addition, the limiting plate groups are designed as detachable clamping plate units, and the units are arranged in an interlaced manner, connected in an overlapped manner and relatively movable, which enhances the structural stability of the fixture and the adaptability to the curved member, and realizes precise linkage between adjacent fixtures, ensuring the positioning reliability and synchronization during sliding. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A perspective view of the welding positioning fixture for the curved arc steel member provided by the application when installed on the curved arc I-beam; Figure 2 A perspective view of the welding positioning fixture for the curved arc steel member provided by the application when installed on the curved arc I-beam; Figure 1 An enlarged view of the structure at A in the above-mentioned welding positioning fixture for the curved arc steel member; Figure 3 A perspective view of the welding positioning fixture for the curved arc steel member provided by the application when installed on the curved arc I-beam; Figure 4 A perspective view of the welding positioning fixture for the curved arc steel member provided by the application when installed on the curved arc I-beam; Figure 5 A sectional view of the connecting plate and the connecting block in the welding positioning fixture for the curved arc steel member provided by the application; Figure 6A state diagram of a bending arc steel component welding positioning tool clamp provided by the present application Figure 1 ; Figure 7 A state diagram of a bending arc steel component welding positioning tool clamp provided by the present application Figure 2 ; Figure 8 A state diagram of a bending arc steel component welding positioning tool clamp provided by the present application Figure 3 .

[0033] Marked for the drawing: 1, bending arc I-beam; 101, wing plate; 102, web; 2, U-shaped plate; 201, straight plate section; 202, main body; 203, connecting part one; 3, inner support plate; 4, web pressing roller; 5, wing plate pressing roller; 6, connecting part two; 7, connecting block; 701, mounting hole; 702, jack; 8, connecting plate; 801, positioning hole; 9, connecting bolt; 10, plug-in plate. Specific implementation

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Those skilled in the art should know that the embodiments described below are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] The following is one of the embodiments of a bending arc steel component welding positioning tool clamp provided by the present application: As shown in Figures 1-8 , a bending arc steel component welding positioning tool clamp is used to clamp and fix the web 102 and two wing plates 101 which need to be spliced to form a bending arc I-beam 1. The bending arc steel component welding positioning tool clamp includes multiple sets of limiting plate groups, and the multiple sets of limiting plate groups are clamped on the outer side of the spliced bending arc I-beam 1 and are arranged at equal intervals along the extension direction of the bending arc I-beam 1.

[0036] As shown in Figure 2 , Figure 3 , the limiting plate group includes two clamping plate units and two sets of connecting structures.

[0037] The two clamping plate units are arranged on the upper and lower sides of the web 102, and the two clamping plate units are staggered with each other along the extension direction of the bending arc I-beam 1, that is, a gap is provided between the two clamping plate units in the extension direction of the bending arc I-beam 1. In this way, the area covered by the limiting plate group in the bending arc I-beam 1 is increased, and the area clamped by a single set of limiting plate group is larger, which is beneficial to the more stable adhesion of the web 102 and the two wing plates 101.

[0038] As shown in Figure 2 , Figure 3 , the clamping plate unit comprises a U-shaped plate 2, two inner supporting plates 3, two web pressing rollers 4 and two wing plate pressing rollers 5.

[0039] As shown in Figure 3 , the U-shaped plate 2 comprises a straight plate section 201 and two end plate sections, the two end plate sections are respectively connected perpendicularly at two ends of the straight plate section 201, and a U-shaped groove is formed on the U-shaped plate 2 between the straight plate section 201 and the two end plate sections, the opening direction of the U-shaped groove is towards the curved arc I-shaped steel 1.

[0040] As shown in Figure 3 , the end plate section comprises a main body 202, a connecting part 203 and a connecting block 7, the main body 202 is plate-shaped and is connected at the end of the straight plate section 201, and the connecting part 203 is located at the side of the main body 202 which is away from the straight plate section 201. The connecting part 203 is a U-shaped bracket, and the opening of the U-shaped bracket is towards the U-shaped groove. The connecting block 7 is fixedly connected at the side of the connecting part 203 which is away from the other connecting part 203, and a horizontally extending mounting hole 701 is provided in the connecting block 7.

[0041] The two inner supporting plates 3 are both located in the U-shaped groove on the U-shaped plate 2, and the two inner supporting plates 3 are both connected perpendicularly at the inner side of the straight plate section 201, and the two inner supporting plates 3 are arranged in a spaced manner along the extension direction of the straight plate section 201. The inner supporting plate 3 is connected with a connecting part 6 at the end which is away from the straight plate section 201, and the connecting part 6 is a U-shaped bracket, and the opening of the U-shaped bracket is away from the straight plate section 201.

[0042] The four inner supporting plates 3 and the four end plate sections in the two clamping plate units enclose a limiting clamping groove on the limiting plate group, and each clamping plate unit has a half-side limiting clamping groove.

[0043] As shown in Figure 4 , the two connecting parts 203 located at the same side of the curved arc I-shaped steel 1 in the two clamping plate units are at the same height position, so that the two end plate sections located at the same side of the curved arc I-shaped steel 1 in the two clamping plate units have an overlapping portion, and the connecting part 203 and the connecting block 7 are the overlapping portion.

[0044] As shown in Figure 3 , the two web pressing rollers 4 are respectively rotatably installed in the two connecting parts 6 in the clamping plate unit, and the rotation axis of the web pressing roller 4 is parallel to the extension direction of the straight plate section 201. The web pressing roller 4 is a rubber roller, and when the clamping plate unit is clamped at the outer side of the curved arc I-shaped steel 1, the web pressing roller 4 is pressed against the outer wall surface of the web plate 102.

[0045] As shown in Figure 3As shown, the two wing plate pressing rollers 5 are respectively rotatably installed on the two connecting portions 203 in the clamping plate units, and the rotation axes of the wing plate pressing rollers 5 are parallel to the extending direction of the end plate segments. The wing plate pressing rollers 5 are rubber rollers, and when the clamping plate units are clamped on the outer side of the curved arc I-beam 1, the wing plate pressing rollers 5 are pressed against the outer wall surface of the wing plate 101.

[0046] The two sets of connecting structures are respectively arranged on the horizontal two sides of the two clamping plate units, and the connecting structure comprises a connecting plate 8 and two connecting bolts 9.

[0047] As shown, Figure 5 the connecting plate 8 is provided with two upper and lower through positioning holes 801 with a circular cross section, the connecting plate 8 is simultaneously arranged in the two mounting holes 701 of the two connecting blocks 7 on the same side of the curved arc I-beam 1 in the two clamping plate units, and the two positioning holes 801 on the connecting plate 8 are respectively centered in the two mounting holes 701, and the width dimension of the connecting plate 8 is smaller than the width dimension of the mounting hole 701.

[0048] The two connecting bolts 9 are respectively threadedly connected on the two connecting blocks 7, the bottom of the connecting bolt 9 is provided with external threads, the connecting bolt 9 passes through the positioning holes 801 on the connecting block 7 and the connecting plate 8, and the bottom end of the connecting bolt 9 is threadedly screwed on the connecting block 7. The connecting plate 8 can freely rotate relative to the connecting bolt 9, so that during the movement of the limiting plate group on the outer side of the curved arc I-beam 1, the two clamping plate units can be offset by a certain distance along the width direction of the web 102 in the curved arc I-beam 1 to adapt to the manufacturing error and avoid the movement of the limiting plate group being blocked.

[0049] Among the two connecting blocks 7 in the two clamping plate units on the same side of the curved arc I-beam 1, the connecting block 7 opposite to the moving direction of the limiting plate group is provided with a horizontal through insertion hole 702, and the connecting block 7 along the moving direction of the limiting plate group is provided with an insertion plate 10, the insertion plate 10 and the insertion hole 702 are positionally corresponding, and the hole diameter dimension of the insertion hole 702 is greater than the outer diameter dimension of the insertion plate 10. When the limiting plate group slides on the curved arc I-beam 1, the insertion plate 10 in the limiting plate group on the rear side is inserted into the insertion hole 702 in the limiting plate group on the front side, so that the two adjacent limiting plate groups are connected, and when each group of limiting plate groups on the subsequent curved arc I-beam 1 is pushed down, the multiple groups of limiting plates are stacked and connected together, which is convenient for collection.

[0050] The arc bending steel member welding positioning tool clamp is further provided with a welding device and a driving mechanism for pushing the limiting plate set to slide on the arc bending I-beam 1, the driving mechanism has a driving output end capable of moving along the extension direction of the arc bending I-beam 1, capable of cooperating with the limiting plate set located at the end portion, and driving the limiting plate set to slide on the arc bending I-beam 1. The driving mechanism can specifically adopt a curve track running mechanism, a push plate is connected to the output end of the curve track running mechanism, the push plate cooperates with the limiting plate set to drive the limiting plate set to slide along the arc line on the arc bending I-beam 1, and the curve track running mechanism is a prior art and is not shown in the figure.

[0051] In use, the web plate 102 and the two wing plates 101 are first spliced into an I-beam structure, and then a plurality of limiting plate sets are installed on the spliced I-beam structure, so that the plurality of limiting plate sets are arranged at equal intervals along the extension direction of the spliced I-beam structure.

[0052] Specific installation steps of the limiting plate set are as follows: two clamping plate units in the limiting plate set are clamped on both sides of the web plate 102 in the I-beam structure respectively, two wing plate pressing rollers 5 in the clamping plate units are pressed on two opposite outer surfaces of the two wing plates 101 respectively, and two web plate pressing rollers 4 are pressed on the outer surfaces of the corresponding sides of the web plate 102. The connecting plate 8 is inserted into two front and rear corresponding mounting holes 701 in the two clamping plate units, the two positioning holes 801 in the connecting plate 8 are kept centered in the two mounting holes 701 respectively, and then two connecting bolts 9 are inserted into the two connecting blocks 7 from top to bottom respectively, the connecting bolts 9 pass through the positioning holes 801 in the connecting plate 8, and the bottoms of the connecting bolts 9 are screwed on the connecting blocks 7.

[0053] After all the limiting plate sets are installed on the workpiece, welding is started, and the movement state of each limiting plate set during welding is as shown in Figures 6-8 The welding device starts from the edge of the arc bending I-beam 1, when welding reaches the first limiting plate set located at the end portion of the arc bending I-beam 1, the driving mechanism starts to drive the limiting plate set to move forward, leaving space, so that the welding mechanism can weld the area of the arc bending I-beam 1 blocked by the limiting plate set. The subsequent driving mechanism pushes the limiting plate set to move forward at the same speed as the welding device during welding, and the limiting plate set is always clamped on the arc bending I-beam 1 near the area being welded, the wing plate 101 and the web plate 102 are tightly attached, and the welding quality is better.

[0054] When the limiting plate group moves to the next limiting plate group, the plug plate 10 at the front side of the limiting plate group is inserted into the socket 702 at the rear side of the next limiting plate group, so that the two adjacent limiting plate groups are connected together. As the welding process continues, the multiple limiting plate groups on the curved arc I-shaped steel 1 are gradually spliced into one body, and finally pushed down from the curved arc I-shaped steel 1 by the driving mechanism. At this time, the operator can take down the spliced multiple limiting plate groups as a whole, which is convenient for collecting and storing.

[0055] When the limiting plate group slides on the curved arc I-shaped steel 1, the two clamping plate units can produce relative displacement. If the curved arc I-shaped steel 1 has regions with different curvatures due to manufacturing errors, the two clamping plate units in the limiting plate group can automatically adapt to the change in the path, thereby avoiding the problem of jamming during sliding.

[0056] The clamp design in the present application can ensure that the wing plates and the web always maintain a close fit state throughout the welding path, effectively eliminating the gap and providing reliable protection for forming a continuous, uniform and high-quality weld. The multiple limiting plate groups can also be automatically spliced into one body through the preset plug-in cooperation during the welding process. When the welding is completed and the workpiece is separated, all the limiting plate groups will not scatter everywhere, but form a complete assembly, which is convenient for subsequent collection and arrangement.

[0057] In the present embodiment, the limiting plate group includes two detachable clamping plate units. During assembly, the two clamping plate units can be clamped on the upper and lower sides of the web 102 of the curved arc workpiece to assemble the limiting plate group on the curved arc workpiece. In other embodiments, the limiting plate group is of an integral structure. During assembly, the web 102 and the two wing plates 101 can be spliced first, and then the integral limiting plate group is sleeved outside the spliced workpiece to realize the installation of the limiting plate group.

[0058] In the present embodiment, two inner clamping plates are arranged in the clamping plate unit, which is suitable for clamping the I-shaped steel workpiece with a longer width of the web 102. In other embodiments, when the width of the web 102 is shorter, only one inner clamping plate is arranged in the clamping plate unit. At this time, the inner clamping plate is located at the middle position of the U-shaped groove in the U-shaped plate 2U in the width direction.

[0059] In the present embodiment, a gap is arranged between the two clamping plate units of the limiting plate group in the length direction of the curved arc I-shaped steel 1. In other embodiments, the two clamping plate units of the limiting plate group can be flush in the vertical plane. At this time, no special connecting structure is needed to make the two clamping plate units produce relative displacement.

[0060] In the present embodiment, the two end plate segments of the two clamping plate units on the same side of the curved arc-shaped I-beam 1 have overlapping portions in the width direction of the wing plate 101, and in other embodiments, the two end plate segments do not overlap in the width direction of the wing plate 101.

[0061] In the present embodiment, the clamping plate unit on the reverse direction of the movement direction of the limiting plate group is provided with the insertion hole 702, and the clamping plate unit on the forward direction of the movement direction of the limiting plate group is provided with the insertion plate 10, and in other embodiments, the clamping plate unit on the reverse direction of the movement direction of the limiting plate group is provided with the insertion plate 10, and the clamping plate unit on the forward direction of the movement direction of the limiting plate group is provided with the insertion hole 702.

[0062] In the present embodiment, the two clamping plate units in the limiting plate group are respectively provided with the insertion plate 10 and the insertion hole 702, and in other embodiments, the clamping plate unit is not provided with the insertion plate 10 and the insertion hole 702, at this time, the limiting plate groups sliding on the curved arc-shaped I-beam 1 are not connected together after stacking, when all the limiting plate groups are pushed off the curved arc-shaped I-beam 1 after the welding is completed, the multiple limiting plate groups may be scattered and need to be manually arranged and collected.

Claims

1. A welding positioning fixture for curved steel components, comprising multiple sets of limiting plates, wherein the multiple sets of limiting plates are installed on the outside of the curved I-beam (1) and arranged at intervals along the extension direction of the curved I-beam (1), characterized in that, The limiting plate assembly is provided with a limiting slot for the curved I-beam (1) to be fitted and inserted. The limiting slot has multiple groove walls for cooperating with the two outer wall surfaces of the web plate (102) and the two opposing outer wall surfaces of the two flanges (101) in the curved I-beam (1). Each groove wall is rotatably mounted with a pressure roller. The rotation axis of each pressure roller is parallel to the corresponding groove wall and perpendicular to the extension direction of the curved I-beam (1). The pressure roller is used to press on the corresponding outer wall surface in the curved I-beam (1). The limiting plate assembly located at the end can be pushed and slide along the extension direction of the curved I-beam (1) during the welding process, and sequentially drive the subsequent limiting plate assembly to slide.

2. The welding positioning fixture for curved steel components according to claim 1, characterized in that, The limiting plate assembly includes two clamping plate units, which are detachably connected. The two clamping plate units are located on both sides of the web plate (102) of the curved I-beam (1).

3. The welding positioning fixture for curved steel components according to claim 2, characterized in that, The clamping unit includes a U-shaped plate (2) and an inner clamping plate. The U-shaped plate (2) includes two parallel end plate segments, which are respectively located on both sides of two wing plates (101). Wing plate (101) pressure rollers are rotatably installed on the inner side of both end plate segments. The wing plate (101) pressure rollers are pressed on the outer wall surface of the wing plate (101). The inner clamping plate is connected to the U-shaped plate (2) and located in the U-shaped groove in the U-shaped plate (2). A web plate (102) pressure roller is rotatably installed on the inner clamping plate. The web plate (102) pressure rollers are pressed on the outer wall surface of the web plate (102).

4. The welding positioning fixture for curved steel components according to claim 3, characterized in that, The card unit includes two inner clamping plates, both of which are located in the U-shaped groove of the U-shaped plate (2), and the two inner clamping plates are arranged at intervals along the width direction of the U-shaped groove.

5. A welding positioning fixture for curved steel components according to claim 4, characterized in that, The two clamping plate units in the limiting plate group are staggered along the extension direction of the curved I-beam (1).

6. The welding positioning fixture for curved steel components according to claim 5, characterized in that, The two end plates of the two plate units located on the same side of the curved I-beam (1) have overlapping portions along the width direction of the flange (101).

7. A welding positioning fixture for curved steel components according to claim 6, characterized in that, A connection structure is provided between the two card plate units in the limiting plate group. The connection structure includes a connecting plate (8) and two connecting bolts (9). The connecting plate (8) passes through the two end plate sections located on the same side of the curved I-beam (1). The two connecting bolts (9) pass through the two end plate sections and through the connecting plate (8) respectively. The two connecting bolts (9) are screwed onto the two end plate sections respectively.

8. A welding positioning fixture for curved steel components according to claim 7, characterized in that, The two clamping plate units in the limiting plate group can move relative to each other along the width direction of the web plate (102) in the curved I-beam (1).

9. A welding positioning fixture for curved steel components according to claim 8, characterized in that, The connecting plate (8) is provided with a positioning hole (801), and the connecting bolt (9) is rotatably inserted into the positioning hole (801), so that the connecting plate (8) can rotate around the connecting bolt (9).

10. A welding positioning fixture for curved steel components according to any one of claims 1-9, characterized in that, One of the clamping plate units in the limiting plate group is provided with a plate (10), and the other clamping plate unit is provided with a hole (702). When the limiting plate group is pushed to slide on the curved I-beam (1), the plate (10) and the hole (702) in the two adjacent limiting plate groups can be inserted and matched.

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