A plate unit assembly welding system and welding method in a bridge steel structure

Abstract

The present application relates to a kind of plate unit assembly welding system and welding method in bridge steel structure, belong to welding technical field.The technical scheme is: the slide (27) in crossbeam assembly (1) is connected with the mounting seat of pressing guiding device (4), slide manual locking assembly (3) is equipped in the side of the slide of crossbeam assembly (1), slide electric drive assembly (2) is equipped above the slide of crossbeam assembly (1), U type rib assembly positioning device (5) and plate type rib assembly positioning device (6) are installed on the connecting frame of pressing guiding device (4).The beneficial effects of the present application are: wide application range, both U type rib workpiece can be fixed-point assembly positioning, and plate type rib workpiece can be continuously assembled and positioned, U type rib workpiece assembly positioning device improves product application range and orthopedic ability to workpiece by quickly replacing profiled insert plate, plate type rib assembly positioning device realizes fast and accurate positioning and pressing by continuously adjusting pressing wheel.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of plate unit assembly welding system and welding method in bridge steel structure, especially for U type rib workpiece and plate type rib workpiece and bottom plate assembly positioning, belong to welding technical field. BACKGROUND

[0002] Steel box girder is currently widely used in bridge steel structure type of structure, wherein, top plate, bottom plate unit is the most basic structure of steel box girder plate unit, plate unit assembly welding is an important work in bridge steel structure manufacturing. One of the processes of top plate, bottom plate unit processing is to assemble and position U type rib workpiece or plate type rib workpiece and bottom plate and manual spot welding. The traditional processing method is: workers rely on simple tooling to force deformation, positioning and compression of the workpiece with dimensional deviation, eliminate the gap between U type rib workpiece or plate type rib workpiece and bottom plate, and then use carbon dioxide gas shielded welding to weld. This processing method is not only inconvenient to operate, labor intensive, low production efficiency, and the processing precision is difficult to guarantee. To solve the above problems, two types of U type rib workpiece assembly positioning device are developed by related equipment manufacturing enterprises. One type is a continuous assembly positioning system that cooperates with continuous automatic welding function. The system can maintain the state of compression and positioning after the workpiece is straightened from the starting point of work, and moves along the length direction of the workpiece. The U type rib workpiece and bottom plate are fixed by assembling and cooperating with automatic welding system. However, due to the large stress generated during continuous welding, the straightening and compression ability of the assembly positioning system to the middle and end of the workpiece is seriously affected, resulting in large dimensional deviation of the workpiece after assembly and welding, increasing the operation difficulty of the following process, and the system only provides the assembly method of U type rib workpiece and bottom plate, and cannot realize the assembly positioning function of plate type rib and bottom plate. The other type is an intermittent assembly positioning system, which relies on a profile tool to press down the workpiece and straighten at a set point to eliminate the gap between the U type rib workpiece and the bottom plate. After the assembly and welding of one point are completed, the tool is lifted off the workpiece and moved to the next point by the walking system to continue pressing the workpiece, and the assembly and positioning work of all points are completed in turn. This type of product generally has the disadvantages of narrow application range, inconvenient adjustment, high cost of accessories, and inability to realize the assembly and positioning function of plate type rib and bottom plate.

[0003] The U type rib workpiece described in the present application refers to: U type reinforcing rib formed by bending or rolling; U type rib and bottom plate are welded and processed into plate unit workpiece. Plate type rib workpiece refers to: flat plate type reinforcing rib; plate type rib and bottom plate are welded and processed into plate unit workpiece. SUMMARY

[0004] The application aims to provide a plate unit assembly welding system and welding method in a bridge steel structure, which can position and assemble U-shaped rib workpieces and plate-shaped rib workpieces, and improve the product application range and workpiece straightening capacity of the U-shaped rib workpiece assembly positioning device through fast replacement of the profiled plug-in plate, and realize fast and accurate positioning and pressing of the plate-shaped rib assembly positioning device through the continuously adjusted pressing wheel, so as to improve the production efficiency and processing quality and solve the problems in the background technology.

[0005] The technical scheme of the application is:

[0006] A plate unit assembly welding system and welding method in a bridge steel structure, the plate unit assembly contains U-shaped rib workpieces or plate-shaped rib workpieces and bottom plates, and contains a beam assembly, a sliding plate electric drive assembly, a sliding plate manual locking assembly, a pressing guide device, a U-shaped rib assembly positioning device and a plate-shaped rib assembly positioning device; the sliding plate of the beam assembly is connected with the mounting seat of the pressing guide device, the sliding plate manual locking assembly is arranged on the side of the sliding plate of the beam assembly, the sliding plate electric drive assembly is arranged above the sliding plate of the beam assembly, and the U-shaped rib assembly positioning device and the plate-shaped rib assembly positioning device are installed on the connecting frame of the pressing guide device.

[0007] The two ends of the longitudinal plate one and the longitudinal plate two in the beam assembly are connected with the two ends of the upper horizontal plate and the lower horizontal plate respectively, to form a rectangular guide beam, the longitudinal plate two in the guide beam is connected with the sliding plate through the upper linear guide rail, and the lower horizontal plate in the guide beam is connected with the sliding plate through the lower linear guide rail. A triangular tooth rack is further installed on the longitudinal plate two, the triangular tooth rack and the tooth-shaped locking block in the sliding plate manual locking assembly have the same tooth shape structure and form a meshing relationship, to completely lock and fix the sliding plate and the guide beam.

[0008] The sliding plate manual locking assembly comprises a fixed guide sleeve, an adjusting screw, a gland, a tooth-shaped locking block, a translational shaft and a key. The inner wall of the fixed guide sleeve is in a stepped structure. The end with a larger inner diameter is a fixed guide sleeve hole. An axial sliding groove is arranged on the inner hole wall. The end with a smaller inner diameter is a threaded hole. The translational shaft is installed in cooperation with the inner hole of the fixed guide sleeve. The translational shaft is provided with a key. The key slides in the sliding groove. The translational shaft is fixedly connected with the tooth-shaped locking block at one end. The other end of the translational shaft is provided with a central groove and fixedly connected with a ring-shaped gland. One end of the adjusting screw is provided with a ring-shaped groove. The end of the adjusting screw passes through the inner ring of the gland into the central groove of the translational shaft. The gland is clamped in the ring-shaped groove. The thread of the adjusting screw is engaged with the thread of the threaded hole of the fixed guide sleeve. The tooth-shaped locking block is engaged with the triangular toothed rack. The translational shaft and the key are used to limit the tooth-shaped locking block from rotating with the adjusting screw. The translational shaft can only move horizontally and cannot rotate. The adjusting screw can rotate relative to the translational shaft but cannot move horizontally. By rotating the adjusting screw manually, the tooth-shaped locking block is extended and retracted, thereby locking and releasing the triangular toothed rack.

[0009] The upper cross plate in the cross beam assembly is provided with a rack which is engaged with a walking gear in the sliding plate electric drive assembly. The sliding plate electric drive assembly is connected to the sliding plate of the cross beam assembly through a speed reducer mounting plate, is driven by a servo motor, is transmitted by a precision planetary reducer, and the output shaft of the precision planetary reducer is provided with a walking gear.

[0010] The pressing guide device comprises a guide mounting frame, a power system, an integral guide plate, a floating guide plate and an intermediate guide plate. The guide mounting frame is directly connected with the sliding plate, and the power system is installed on the guide mounting frame. The power system is driven by a hydraulic cylinder. When the cylinder rod is extended, the U-shaped rib assembly positioning device and the plate-shaped rib assembly positioning device are driven to press the workpiece downward. When the cylinder rod is retracted, the U-shaped rib assembly positioning device and the plate-shaped rib assembly positioning device are lifted to release the workpiece.

[0011] The U-shaped rib assembly positioning device adopts a profiled plug structure. The profiled plug is fixedly installed at the lower end of the floating guide plate of the pressing guide device through a set of mutually perpendicular positioning notches one and two. After the profiled plug is connected with the top tightening bolt, the floating guide plate is top-tightened on the side surface for secondary pre-tightening.

[0012] Each of the left and right floating guide plates is provided with a profiled plug. The profiled plug is driven to move by the hydraulic cylinder to complete the contact, positioning and pressing of the profiled plug and the U-shaped rib workpiece. The surface size of the profiled plug in contact with the U-shaped rib workpiece is made according to the size of the standard U-shaped rib workpiece on the drawing. When the size of the U-shaped rib workpiece to be assembled and positioned changes, the U-shaped rib assembly positioning device needs to replace the profiled plug corresponding to the size of the U-shaped rib workpiece.

[0013] The plate type rib assembly positioning device is connected to the integral guide plate in the compression guide device through a connecting bracket and moves with the up and down movement of the integral guide plate; the plate type rib assembly positioning device comprises a tool support, an adjustable upper compression wheel, a fixed side compression wheel and a movable side compression wheel; the tool support is connected to the connecting bracket through two fixed pin shafts, and each side of the fixed pin shaft on the connecting bracket has a group of positioning pin holes; two plug-in positioning pins are used to fix the tool support at 0° and 180° positions; when the plate type rib assembly positioning device is needed, the tool support is installed at the 0° position, and the positioning pins are inserted into the corresponding positioning pin holes; when the U type rib assembly positioning device is needed, the tool support is installed at the 180° position, and the plug-in positioning pins are inserted into the corresponding positioning pin holes; the adjustable upper compression wheel is installed on a group of guide seats, a trapezoidal lead screw is connected to the middle position of the guide seat, the trapezoidal lead screw is fixed on the tool support through a lead screw nut, and two guide shafts are connected to the two sides of the guide seat, respectively; the two guide shafts are fixed on the tool support through two groups of guide shaft sleeves. The trapezoidal lead screw is manually rotated to drive the guide seat to move along the axis of the trapezoidal lead screw, and the guide seat cannot move horizontally or rotate.

[0014] A plate unit assembly welding method in a bridge steel structure, the plate unit assembly comprises assembling and positioning U type rib workpieces or plate type rib workpieces with a bottom plate and spot welding; for the U type rib workpieces, a U type rib assembly positioning device is used to position the U type rib workpieces and the bottom plate, first, the slide plate of the beam assembly is moved by the slide plate electric drive assembly to make the middle line positions of the two side profiled insertion plates of the U type rib assembly positioning device coincide with the middle line positions of the U type rib workpieces, then the profiled insertion plate is moved downward by the hydraulic cylinder one in the compression guide device until the profiled insertion plate working surface contacts the outer contour surface of the U type rib workpiece, when the U type rib workpiece is positioned and compressed to the required size, the U type rib assembly positioning device is adjusted, and the assembly and positioning between the U type rib workpieces and the bottom plate and spot welding are performed; for the plate type rib workpieces, a plate type rib assembly positioning device is used to position the plate type rib workpieces and the bottom plate, first, the fixed side compression wheel is tightly attached to one side surface of the plate type rib workpiece by moving the slide plate by the slide plate electric drive assembly, then the movable side compression wheel is pushed to tightly attach to the other side surface of the plate type rib workpiece by controlling the hydraulic cylinder two connected to the compression bracket, and then the tool support and the adjustable upper compression wheel are moved downward by controlling the hydraulic cylinder one in the compression guide device, when the stroke of the hydraulic cylinder one does not meet the working condition, the trapezoidal lead screw on the guide seat one is adjusted, the position of the adjustable upper compression wheel is continuously adjusted downward, until the adjustable upper compression wheel contacts the plate thickness section of the plate type rib workpiece, the plate type rib assembly positioning device is adjusted, and the assembly and positioning between the plate type rib workpieces and the bottom plate and spot welding are performed.

[0015] The present application has the advantages of wide application range, capable of positioning and assembling U-shaped rib workpieces and capable of continuously positioning and assembling plate-shaped rib workpieces, the U-shaped rib workpiece positioning and assembling device improves the product application range and the workpiece straightening capacity by quickly replacing the profiled inserting plate, the plate-shaped rib positioning and assembling device realizes quick and accurate positioning and pressing by the continuously adjusted pressing wheel, the two functions do not interfere with each other, the switching is convenient, and the production efficiency and machining quality are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole schematic diagram of the embodiment of the present application;

[0017] Figure 2 It is a schematic diagram of the beam assembly of the embodiment of the present application;

[0018] Figure 3 It is a schematic diagram of the connection between the beam assembly and the sliding plate manual locking assembly of the embodiment of the present application;

[0019] Figure 4 It is a schematic diagram of the tooth-shaped locking block parameters of the embodiment of the present application;

[0020] Figure 5 It is a schematic diagram of the sliding plate manual locking assembly of the embodiment of the present application;

[0021] Figure 6 It is a schematic diagram of the sliding plate electric driving assembly of the embodiment of the present application;

[0022] Figure 7 It is a schematic diagram of the pressing and guiding device of the embodiment of the present application;

[0023] Figure 8 It is a local enlarged view of the pressing and guiding device of the embodiment of the present application;

[0024] Figure 9 It is a schematic diagram of the bottom structure of the U-shaped rib positioning and assembling device of the embodiment of the present application;

[0025] Figure 10 It is a schematic diagram of the plate-shaped rib positioning and assembling device of the embodiment of the present application;

[0026] Figure 11 It is a front view of the plate-shaped rib positioning and assembling device of the embodiment of the present application;

[0027] Figure 12 It is a bottom view of the plate-shaped rib positioning and assembling device of the embodiment of the present application;

[0028] Figure 13 It is a schematic diagram of the fixed side pressing wheel structure of the embodiment of the present application;

[0029] Figure 14 It is a schematic diagram of the movable side pressing wheel structure of the embodiment of the present application;

[0030] Figure 15 Figure 1 is a schematic diagram of the first step of positioning the U-shaped rib workpiece in an embodiment of the present application;

[0031] Figure 16 Figure 2 is a schematic diagram of the second step of positioning the U-shaped rib workpiece in an embodiment of the present application;

[0032] Figure 17 Figure 3 is a schematic diagram of the third step of positioning the U-shaped rib workpiece in an embodiment of the present application;

[0033] Figure 18 Figure 4 is a schematic diagram of the fourth step of positioning the U-shaped rib workpiece in an embodiment of the present application;

[0034] Figure 19 Figure 5 is a schematic diagram of the first step of positioning the plate-shaped rib workpiece in an embodiment of the present application;

[0035] Figure 20 Figure 6 is a schematic diagram of the second step of positioning the plate-shaped rib workpiece in an embodiment of the present application;

[0036] Figure 21 Figure 7 is a schematic diagram of the third step of positioning the plate-shaped rib workpiece in an embodiment of the present application;

[0037] Figure 22 Figure 8 is a schematic diagram of the fourth step of positioning the plate-shaped rib workpiece in an embodiment of the present application;

[0038] Figure 23 Figure 9 is a photograph of the spot welding effect after positioning the U-shaped rib workpiece in an embodiment of the present application;

[0039] Figure 24 Figure 10 is a photograph of the overall spot welding effect after positioning the U-shaped rib workpiece in an embodiment of the present application;

[0040] In the figure: beam assembly 1, slide plate electric drive assembly 2, slide plate manual locking assembly 3, compression guide device 4, U-shaped rib assembly positioning device 5, plate-shaped rib assembly positioning device 6, bottom plate 7, U-shaped rib workpiece 8, plate-shaped rib workpiece 9; longitudinal plate one 11, longitudinal plate two 12, lower cross plate 13, upper cross plate 14, upper linear guide rail 15, lower linear guide rail 16, triangular toothed rack 17, toothed locking block 18, slide plate manual locking assembly 19, adjusting lead screw 20, pointer one 21, fixed guide sleeve 22, photoelectric sensing switch 23, rectangular groove sliding sleeve 24, flat key 25, compression cover 26, slide plate 27, annular groove 28, translational shaft 29, sliding groove 30, servo motor 31, precision planetary reducer 32, rack 33, walking gear 34, reducer mounting plate 35, hydraulic cylinder one 41, transition joint 42, integral guide plate 43, pin shaft one 44, swing plate 45, pin shaft two 46, guide compression plate 47, floating guide plate 48, intermediate guide compression plate 49, profiled plug plate 50, needle roller bearing 51, guide mounting frame 52, positioning stop one 53, jacking bolt 54, positioning stop two 55, connecting bracket 61, tooling bracket 62, fixed pin shaft 63, plug-in positioning pin 64, guide shaft one 65, trapezoidal lead screw 66, guide seat one 67, lead screw nut 68, guide sleeve one 69, upper compression wheel 70, fixed side compression wheel 71, movable side compression wheel 72, scale 73, pointer two 74, jacking bracket 75, hydraulic cylinder 76, rolling bearing one 77, support pin shaft one 78, rolling bearing two 79, support pin shaft two 80, guide shaft two 81, guide seat two 82, guide sleeve two 83. DETAILED DESCRIPTION

[0041] The application will be further described below by examples in combination with the accompanying drawings.

[0042] A plate unit assembly welding system and welding method in a bridge steel structure, the plate unit assembly includes assembling and positioning U-shaped rib workpieces or plate-shaped rib workpieces with bottom plates and spot welding; the system includes beam assembly 1, slide plate electric drive assembly 2, slide plate manual locking assembly 3, compression guide device 4, U-shaped rib assembly positioning device 5, and plate-shaped rib assembly positioning device 6; the slide plate 27 of the beam assembly 1 is connected with the mounting seat of the compression guide device 4, the slide plate side of the beam assembly 1 is provided with the slide plate manual locking assembly 3, the slide plate upper side of the beam assembly 1 is provided with the slide plate electric drive assembly 2, and the U-shaped rib assembly positioning device 5 and the plate-shaped rib assembly positioning device 6 are mounted on the connecting frame of the compression guide device 4.

[0043] The longitudinal plate one 11 and the longitudinal plate two 12 in the crossbeam assembly 1 are respectively connected with the upper cross plate 14 and the lower cross plate 13 at both ends, forming a rectangular guide crossbeam, the longitudinal plate two 12 in the guide crossbeam is connected with the sliding plate 27 through the upper linear guide rail 15, and the lower cross plate 13 in the guide crossbeam is connected with the sliding plate 27 through the lower linear guide rail 16. The triangular tooth rack 17 is also installed on the longitudinal plate two 12, which has the same tooth structure as the toothed locking block 18 in the sliding plate manual locking assembly 3, forming an engagement relationship, and completely locking and fixing the sliding plate 27 and the guide crossbeam.

[0044] Because the assembly positioning device will generate a large transverse thrust in the working process, the action force is transmitted to the guide crossbeam through the meshing of the triangular teeth, preventing the action force from being transmitted to the relatively weak structural units such as the sliding plate electric drive assembly and the upper and lower linear guide rails. After the triangular teeth are engaged, two action forces in opposite directions can be carried, and the engagement gap can be effectively eliminated, so that the positioning accuracy is high and the locking effect is good. Although the tooth engagement method is a non-continuous adjustment, through bearing stress analysis, the tooth structure can be reduced to ensure that the maximum positioning deviation is less than 1mm, meeting the use requirements of the equipment.

[0045] The sliding plate manual locking assembly 3 comprises a fixed guide sleeve 22, an adjusting screw 20, a gland 26, a toothed locking block 18, a translational shaft 29 and a flat key. The inner wall of the fixed guide sleeve 22 is a stepped structure, the end with a larger inner diameter is the inner hole of the fixed guide sleeve 22, and the inner hole wall is provided with a sliding groove 30 arranged in the axial direction. The end with a smaller inner diameter of the fixed guide sleeve 22 is a threaded hole; the translational shaft 29 is installed in cooperation with the inner hole of the fixed guide sleeve 22, the translational shaft 29 is provided with a flat key 25, and the flat key 25 slides in the sliding groove 30; one end of the translational shaft 29 is fixedly connected with the toothed locking block 18, and the other end of the translational shaft 29 is provided with a central groove and fixedly connected with the annular gland 26; one end of the adjusting screw 20 is provided with an annular groove 28, the end of the adjusting screw 20 passes through the inner ring of the gland 26 and enters the central groove of the translational shaft 29, and the gland 26 is clamped in the annular groove 28; the thread of the adjusting screw 20 is engaged with the thread of the threaded hole of the fixed guide sleeve 22; the toothed locking block 18 is engaged with the triangular tooth rack 17. The translational shaft 29 and the flat key 25 are used to limit the rotation of the toothed locking block 18 with the adjusting screw 20, and the translational shaft 29 can only move horizontally and cannot rotate. The adjusting screw 20 can rotate relative to the translational shaft, but cannot move horizontally. By rotating the adjusting screw 20 manually, the toothed locking block 18 is extended and retracted, and the locking and loosening of the triangular tooth rack 17 are completed.

[0046] The upper cross plate 14 in the cross beam assembly 1 is installed with a rack 33 which is engaged with a walking gear 34 in the slide plate electric drive assembly 2; the slide plate electric drive assembly 2 is connected to the slide plate 27 of the cross beam assembly 1 through a speed reducer mounting plate 35, is driven by a servo motor 31, is transmitted by a precision planetary reducer 32, and the walking gear 34 is installed on the output shaft of the precision planetary reducer 32. The slide plate electric drive assembly 2 can drive the slide plate 27, the slide plate manual locking assembly 3, the pressing guide device 4, the U-shaped rib assembly positioning device 5, and the plate-shaped rib assembly positioning device 6 to move along the length direction of the cross beam; the combination of the servo motor 31 and the precision planetary reducer 32 can realize accurate speed control and position control, and has a position memory function.

[0047] The pressing guide device 4 comprises a guide mounting frame 52, a power system, an overall guide plate 43, a floating guide plate 48, and an intermediate guide pressing plate 49; the guide mounting frame 52 is directly connected with the slide plate 27, and the power system is installed on the guide mounting frame 52; the power system outputs driving force by a hydraulic oil cylinder 41, the oil cylinder rod is extended to drive the U-shaped rib assembly positioning device 5 and the plate-shaped rib assembly positioning device 6 to press the workpiece downward, and the oil cylinder rod is retracted to lift the U-shaped rib assembly positioning device 5 and the plate-shaped rib assembly positioning device 6 to release the workpiece; different types of workpieces require different sizes of driving force output by the power system.

[0048] The whole guide plate 43 is connected with the outer thread on the oil cylinder rod of the hydraulic oil cylinder one 41 through the transition joint 42, the whole guide plate 43 slides in the rectangular slot formed between the left and right guide pressing plates 47, and can only move along the axial direction of the oil cylinder rod of the hydraulic oil cylinder one 41, and cannot move horizontally or rotate; the left and right guide pressing plates 47 are both fixedly installed on the guide mounting frame 52; the whole guide plate 43 is connected with a swing plate 45 through a pin shaft one 44, in the movement process, the swing plate 45 can rotate a certain angle around the pin shaft one 44, the swing plate 45 has a long circular hole on the left side and the right side respectively, a needle bearing 51 is installed in the long circular hole, the needle bearing 51 can move horizontally or rotate in the long circular hole, and the left and right groups of needle bearings are connected with the left and right floating guide plates 48 through the left and right pin shafts two 46 respectively; the left and right floating guide plates 48 slide in the rectangular slot formed by the left and right guide pressing plates 47 and the middle guide pressing plate 49, and can only move along the axial direction of the oil cylinder rod of the hydraulic oil cylinder one 41, and cannot move horizontally or rotate; the middle guide pressing plate 49 is fixedly installed on the guide mounting frame 52; due to the existence of the two long circular holes of the swing plate 45, the positions of the left and right floating guide plates 48 moving along the axial direction of the oil cylinder rod of the hydraulic oil cylinder one 41 can be equal height or staggered by a certain distance, the size of the staggered distance depends on the size of the long circular hole and the size of the rotating angle of the swing plate 45, and the staggered distance can adapt to the deviation of the left and right unequal heights of the upper plane of the U-shaped rib workpiece after processing. The guide pressing plate 47 is in clearance fit with the contact surface of the whole guide plate 43 and the floating guide plate 48, and is in relative sliding state for a long time, so the oil groove and the oil injection port are processed on the pressing guide plane of the guide pressing plate 47, which is convenient for regular lubrication.

[0049] The U-shaped rib assembly positioning device 5 adopts the structure form of a profiled plug plate; the profiled plug plate 50 is fixedly installed at the lower end of the floating guide plate 48 of the pressing guide device 4 through a group of mutually perpendicular positioning notches one 53 and positioning notches two 55, and after the profiled plug plate 50 is connected by the jacking bolt 54, the side of the floating guide plate 48 is jacked again; this kind of installation mode can realize the quick disassembly and assembly of the profiled plug plate 50, improve the work efficiency, and at the same time, reduce the cross-sectional size of the profiled plug plate 50 and reduce the processing cost.

[0050] The left and right floating guide plates 48 are each installed with a profiled plug plate 50, and the whole guide plate 43, the swing plate 45 and the floating guide plate 48 are driven to move by the output driving force of the hydraulic oil cylinder one 41, so as to complete the contact, positioning and pressing of the profiled plug plate 50 and the U-shaped rib workpiece; the surface size of the profiled plug plate 50 in contact with the U-shaped rib workpiece is made according to the size of the standard U-shaped rib workpiece on the drawing, the contact surface is ground and quenched to improve the surface hardness.

[0051] When the size of the U-shaped rib workpiece to be assembled and positioned changes, the U-shaped rib assembly positioning device 5 needs to be replaced with a profiled insert plate 50 corresponding to the size of the U-shaped rib workpiece.

[0052] Before the U-shaped rib assembly positioning device 5 starts to work, first use the slide plate electric drive assembly 2 to drive the slide plate 27 of the cross beam assembly 1 to move, so that the center line positions of the profiled insert plates 50 on both sides of the U-shaped rib assembly positioning device 5 coincide with the center line positions of the U-shaped rib workpiece, and then rely on the hydraulic oil cylinder one 41 in the pressure guiding device 4 to drive the profiled insert plates 50 to move downward to contact the outer contour surface of the U-shaped rib workpiece on the working surface of the profiled insert plates. When the U-shaped rib workpiece is positioned and pressed to the required size, the U-shaped rib assembly positioning device 5 is adjusted and completed.

[0053] The plate-shaped rib assembly positioning device 6 is connected to the overall guiding plate 43 in the pressure guiding device 4 through the connecting bracket 61 and moves up and down with the overall guiding plate 43; the plate-shaped rib assembly positioning device 6 includes a tool support 62, an adjustable upper pressing wheel 70, a fixed side pressing wheel 71, and a movable side pressing wheel 72; the tool support is connected to the connecting bracket 61 through two fixed pin shafts 63 on the left and right, and each side of the fixed pin shaft 63 on the connecting bracket 61 has a group of positioning pin holes; two plug-in positioning pins 64 are used to fix the tool support 62 at 0° and 180° positions; when the plate-shaped rib assembly positioning device 6 is needed to be used, the tool support 61 is installed at the 0° position, and the positioning pins are inserted into the corresponding positioning pin holes; when the U-shaped rib assembly positioning device is needed to be used, the tool support is installed at the 180° position, and the plug-in positioning pins 64 are inserted into the corresponding positioning pin holes; the adjustable upper pressing wheel 70 is installed on a group of guiding seats one 67, a trapezoidal lead screw 66 is connected to the middle position of the guiding seat one 67, the trapezoidal lead screw 66 is fixed on the tool support 62 through a lead screw nut 68, and two guiding shafts one 65 are connected to the two sides of the guiding seat one 67. By manually rotating the trapezoidal lead screw 66, the guiding seat one 67 can be moved along the axis direction of the trapezoidal lead screw 66, and the guiding seat one 67 cannot be horizontally translated or rotated.

[0054] The inner ring of the adjustable upper pressing wheel 70 is installed with a rolling bearing, the inner ring of the rolling bearing 77 is connected with a supporting pin shaft, the two ends of the supporting pin shaft are fixed in the mounting holes of the guiding seat one 67, and the axis of the adjustable upper pressing wheel 70 is arranged in the horizontal direction; a pointer two 74 is installed on the front surface of the guiding seat one 67, which is used in cooperation with a scale 73 installed on the tool support 62 to display the adjustment position of the adjustable upper pressing wheel 70.

[0055] The fixed side pressure wheel 71 has two groups, arranged in front and back along the walking direction during work, and each group of fixed side pressure wheel 71 has a rolling bearing 77 installed in the inner circle, and the inner circle of the rolling bearing 77 is connected with a support pin shaft 78, and the two ends of the support pin shaft 78 are fixed in the mounting hole of the side of the tool support 62; the fixed side pressure wheel 71 can only rotate along the axis of the support pin shaft 78, and cannot move or rotate in other directions.

[0056] The movable side pressure wheel 72 is installed on a group of clamping supports 75, and the middle position of the clamping support 75 is connected with the cylinder rod of a group of hydraulic cylinders 76, and the hydraulic cylinders 76 are fixedly installed on the tool support 62, and the two sides of the clamping support 75 are respectively installed with a guide shaft 81, and the two guide shafts 81 are fixed on the side plate of the tool support 62 through guide shaft sleeves 83.

[0057] The movable side pressure wheel 72 has two groups, arranged in front and back along the walking direction during work, and is coplanar with the two groups of fixed side pressure wheels 71, and each group of movable side pressure wheel 72 has a rolling bearing 79 installed in the inner circle, and the inner circle of the rolling bearing 79 is connected with a support pin shaft 80, and the two ends of the support pin shaft 80 are fixed in the mounting hole of the clamping support 75; by controlling the extension and retraction of the hydraulic cylinder 76, the clamping support 75 is driven to move forward and backward, and the distance between the movable side pressure wheel 72 and the side busbar of the fixed side pressure wheel 71 is adjusted.

[0058] Before the plate rib assembly positioning device 6 starts to work, the sliding plate 27 is moved by the sliding plate electric drive assembly 2 to tightly press the fixed side pressure wheel 71 against one side of the plate rib workpiece, and then the hydraulic cylinder 76 connected with the clamping support 75 is controlled to act, and the movable side pressure wheel 72 is pushed to tightly press the other side of the plate rib workpiece, and then the hydraulic cylinder 41 in the pressing guide device 4 is controlled to act, and the tool support 62 and the adjustable upper pressing wheel 70 are driven to move downward, when the stroke of the hydraulic cylinder 41 does not meet the working condition, the trapezoidal lead screw 66 on the guide seat 67 is adjusted, and the position of the adjustable upper pressing wheel 70 is continuously adjusted downward, until the adjustable upper pressing wheel 70 contacts the plate thickness section of the plate rib workpiece, and the plate rib assembly positioning device 6 is adjusted.

[0059] A kind of plate unit assembly welding method in bridge steel structure, the plate unit assembly includes the assembly positioning and spot welding of U rib workpiece or plate rib workpiece with bottom plate;For U rib workpiece, using U rib assembly positioning device 5 is positioned between U rib workpiece and bottom plate, first, the middle line position of profiled insert plate 50 on both sides of U rib assembly positioning device 5 is coincided with the middle line position of U rib workpiece, then rely on the downward movement of profiled insert plate 50 to the profiled insert plate working face contact U rib workpiece outer contour surface by the action of hydraulic cylinder one 41 in pressure guiding device 4, when U rib workpiece is positioned and pressed to meet the required size, U rib assembly positioning device 5 is adjusted, and the assembly positioning and spot welding between U rib workpiece and bottom plate are carried out;For plate rib workpiece, using plate rib assembly positioning device 6 is positioned between plate rib workpiece and bottom plate, first, fixed side pressure wheel 71 is tightly attached to one side of plate rib workpiece by moving slide plate 27 with electric drive assembly 2, then hydraulic cylinder two 76 connected with top pressing support 75 is controlled to act, and movable side pressure wheel 72 is pushed to press the other side of plate rib workpiece, and then hydraulic cylinder one 41 in pressure guiding device 4 is controlled to act, and tool support 62 and adjustable upper pressure wheel 70 are moved downward, when the stroke of hydraulic cylinder one 41 does not meet the working condition, ladder screw 66 on guiding seat one 67 is adjusted, and the position of adjustable upper pressure wheel 70 is continuously adjusted downward, until adjustable upper pressure wheel 70 contacts the plate thickness section of plate rib workpiece, plate rib assembly positioning device 6 is adjusted, and the assembly positioning and spot welding between plate rib workpiece and bottom plate are carried out.

[0060] In the embodiment, the specific process flow in actual application is as follows:

[0061] (1) U rib workpiece 8 assembly positioning process flow:

[0062] Step one: refer to attached Figure 15 Before using U rib assembly positioning device 5, plate rib assembly positioning device 6 needs to be turned up by a certain angle to avoid the working interval of U rib assembly positioning device 5, and fixed and locked by plug-in positioning pin; Bottom plate 7 of plate unit is hoisted to platform, and the placement position of bottom plate 7 in width direction is positioned by limiting device (prior art) on platform 7.

[0063] Step two: refer to attached Figure 16 Multiple U rib workpieces 8 of plate unit are hoisted to corresponding positions on bottom plate 7 in sequence and coarsely positioned.

[0064] Step three: refer to attached Figure 17Adjust the working position of the machine head of the U-rib assembly positioning device 5, install the contour plate that matches the size of the U-rib workpiece 8, press the U-rib workpiece 8 downward from the starting point of the length direction of the U-rib workpiece 8, and correct the U-rib workpiece 8 with large deviation in shape and size. After pressing, manually spot weld the U-rib workpiece 8 to the base plate 7.

[0065] Step Four: Refer to Appendix Figure 18 The head of the U-rib assembly positioning device 5 is lifted and detached from the U-rib workpiece 8. Following the horizontal movement of the crossbeam assembly 1, it moves along the length of the plate unit to the next position that needs to be positioned for spot welding. It repeats the action of pressing down on another U-rib workpiece 8, and sequentially completes the assembly and positioning of all U-rib workpieces 8 that need to be assembled and positioned.

[0066] Reference Figure 23 , 24 The U-shaped rib workpiece 8 and the base plate 7 were assembled and positioned using the present invention. The effect after spot welding is shown in the figure. The figure shows a photo of the weld formation, which ensures that the gap between the U-shaped rib workpiece and the base plate is less than 0.5mm and the U-shaped rib workpiece is accurately positioned.

[0067] (2) Assembly and positioning process of plate-shaped rib workpiece 9:

[0068] Step 1: Refer to the appendix Figure 19 Before using the plate rib assembly positioning device 6, the plate rib assembly positioning device 6 needs to be rotated downwards at a certain angle to the normal working position and fixed and locked using the plug-in positioning pin. The base plate 7 of the plate unit is hoisted onto the platform, and the positioning device (existing technology) on the platform is used to position the base plate in the width direction.

[0069] Step Two: Refer to Appendix Figure 20 Multiple plate-shaped rib workpieces 9 of the plate unit plate are hoisted sequentially to the corresponding positions on the bottom plate 7, and the two ends of the plate-shaped rib workpieces 9 in the length direction are manually spot welded to fix them; to ensure that the plate-shaped rib workpieces 9 and the bottom plate 7 are basically perpendicular.

[0070] Step 3: Refer to the appendix Figure 21 Adjust the working position of the machine head of the plate rib assembly positioning device 6. Starting from the starting point along the length of the plate rib workpiece 9, move the plate rib assembly positioning device 6 downwards to make the fixed side pressure roller and the movable side pressure roller press against the two sides of the plate rib workpiece 9 respectively. Then adjust the trapezoidal screw to make the adjustable upper pressure roller press against the plate rib workpiece 9. After pressing, manually spot weld the plate rib workpiece 9 to the base plate 7. The plate rib assembly positioning device 6 always maintains the positioning and pressing of the plate rib workpiece 9. Following the horizontal movement of the crossbeam assembly 1, it moves along the length of the plate rib workpiece 9. At the fixed welding point, the plate rib workpiece 9 and the base plate 7 are spot welded manually.

[0071] Step Four: Refer to Appendix Figure 22When all the spot welding of the plate-rib workpiece 9 is completed, the movable side pressing wheel of the plate-rib assembling and positioning device 6 is retracted to be separated from the workpiece, and the head of the plate-rib assembling and positioning device 6 is lifted to be separated from the plate-rib workpiece 9.

[0072] Referring to the drawings Figure 4 The parameters of the triangular tooth rack 17 and the tooth-shaped locking block 18 are as follows: the pitch A is 2±0.05mm, the tooth height B is 1.73mm, and the tooth bottom width C is 2mm. The tooth angle is 60°, and the tooth shape is an equilateral triangle. The machining precision is 3.2.

[0073] Referring to the drawings Figure 7 , 8 , 9. The hydraulic cylinder one 41 is installed on the guide mounting frame 52; the cylinder rod of the hydraulic cylinder one 41 is drivingly connected to the integral guide plate 43; the integral guide plate 43 is vertically arranged at the lower part of the guide mounting frame 52, and the rectangular channel is formed between the left and right guide pressing plates 47 on the guide mounting frame 52, and the integral guide plate 43 slides up and down along the axial direction in the rectangular channel, and cannot move left and right or rotate; the integral guide plate 43 is connected to the swing plate 45 through the pin shaft one 44, and the two floating guide plates 48 are vertically arranged at the left and right sides below the swing plate 45; the middle guide pressing plate 49 is arranged between the lower parts of the two floating guide plates 48 and is fixed on the guide mounting frame 52; the left and right floating guide plates 48 slide up and down in the rectangular channel between the two guide pressing plates 47 and the middle guide pressing plate 49; the bottoms of the left and right floating guide plates 48 are respectively provided with the profiling insert plates 50, and the profiling insert plates 50 are fixedly installed on the lower ends of the floating guide plates 48 through a set of mutually perpendicular positioning stops one 53 and positioning stops two 55; the profiling insert plates 50 are matched with the shape of the U-shaped rib workpiece, and the left and right profiling insert plates 50 press the two side surfaces of the U-shaped rib workpiece respectively. This kind of installation mode can realize the quick disassembly and assembly of the profiling insert plates 50, improve the work efficiency, and at the same time, reduce the cross-sectional size of the profiling insert plates 50 and the machining cost.

Claims

1. A plate unit assembly welding system in a bridge steel structure, the plate unit assembly comprising assembling, positioning and spot welding a U-shaped rib workpiece or a plate-shaped rib workpiece with a bottom plate; characterized in that: The utility model relates to a kind of U-shaped rib and plate rib assembly positioning device, including crossbeam component (1), sliding plate electric drive component (2), sliding plate manual locking component (3), compression guiding device (4), U-shaped rib assembly positioning device (5) and plate rib assembly positioning device (6);The mounting seat of sliding plate (27) in crossbeam component (1) is connected with compression guiding device (4), sliding plate side of crossbeam component (1) is equipped with sliding plate manual locking component (3), the upper side of sliding plate of crossbeam component (1) is equipped with sliding plate electric drive component (2), U-shaped rib assembly positioning device (5) and plate rib assembly positioning device (6) are installed on the connecting frame of compression guiding device (4); The compression guiding device (4) includes a guiding mounting frame (52), a power system, an overall guiding plate (43), floating guiding plates (48), and an intermediate guiding plate (49). The guiding mounting frame (52) is directly connected with the sliding plate (27), and the power system is installed on the guiding mounting frame (52). The power system outputs driving force from a hydraulic cylinder (41), and the cylinder rod extends to drive the U-shaped rib assembly positioning device (5) and the plate rib assembly positioning device (6) to press down the workpiece. The cylinder rod retracts, and the U-shaped rib assembly positioning device (5) and the plate rib assembly positioning device (6) lift up to release the workpiece. The overall guiding plate (43) is connected with the external thread on the cylinder rod of the hydraulic cylinder (41) through a transition joint (42). The overall guiding plate (43) slides in the rectangular slot formed between the guiding plates (47) on the left and right sides of the overall guiding plate (43), and can only move along the axis direction of the cylinder rod of the hydraulic cylinder (41), but cannot move horizontally or rotate. The guiding plates (47) on the left and right sides are fixedly installed on the guiding mounting frame (52). The overall guiding plate (43) is connected with a swing plate (45) through a pin shaft (44). During movement, the swing plate (45) can rotate around the pin shaft (44). The swing plate (45) has a long circular hole on the left and right sides of the lower side. A needle bearing (51) is installed in the long circular hole. The needle bearing (51) can move horizontally or rotate in the long circular hole. The two groups of needle bearings are connected with the floating guiding plates (48) on the left and right sides through two pin shafts (46) on the left and right sides. The floating guiding plates (48) on the left and right sides slide in the rectangular slot formed by the guiding plates (47) on the left and right sides and the intermediate guiding plate (49), and can only move along the axis direction of the cylinder rod of the hydraulic cylinder (41), but cannot move horizontally or rotate. The intermediate guiding plate (49) is fixedly installed on the guiding mounting frame (52). Due to the existence of the two long circular holes of the swing plate (45), the positions of the floating guiding plates (48) on the left and right sides moving along the axis direction of the cylinder rod of the hydraulic cylinder (41) can be equal height or offset by a certain distance. The offset distance depends on the size of the long circular hole and the rotation angle of the swing plate (45). The offset distance adapts to the deviation of the upper plane of the U-shaped rib workpiece after processing. The guiding plates (47) are in clearance fit with the contact surfaces of the overall guiding plate (43) and the floating guiding plates (48), and are in a relative sliding state for a long time. The U-shaped rib assembly positioning device (5) adopts the structure of a profiled insert plate. The profiled insert plate (50) is fixedly installed at the lower end of the floating guide plate (48) of the pressing guide device (4) through a set of mutually perpendicular positioning notches one (53) and two (55), and after the profiled insert plate (50) is connected by the jacking bolt (54), the side of the floating guide plate (48) is secondarily pre-tightened. Each of the left and right floating guide plates (48) is installed with a profiled insert plate (50), and through the output driving force of the hydraulic oil cylinder one (41), the integral guide plate (43), the swing plate (45) and the floating guide plate (48) are driven to move, so as to complete the contact, positioning and pressing of the profiled insert plate (50) and the U-shaped rib workpiece. The surface size of the profiled insert plate (50) in contact with the U-shaped rib workpiece is made according to the size of the standard U-shaped rib workpiece on the drawing. When the size of the U-shaped rib workpiece to be assembled and positioned changes, the profiled insert plate (50) corresponding to the size of the U-shaped rib workpiece needs to be replaced.

2. A plate unit assembly welding system in a bridge steel structure according to claim 1, characterized in that: The longitudinal plate one (11) and the longitudinal plate two (12) in the cross beam assembly (1) are respectively connected with the upper transverse plate (14) and the lower transverse plate (13) at both ends, forming a rectangular guide cross beam. The longitudinal plate two (12) in the guide cross beam is connected with the sliding plate (27) through the upper linear guide rail (15), and the lower transverse plate (13) in the guide cross beam is connected with the sliding plate (27) through the lower linear guide rail (16). The triangular toothed rack (17) is further installed on the longitudinal plate two (12), which has the same tooth shape structure as the toothed locking block (18) in the sliding plate manual locking assembly (3), forming a meshing relationship, and completely locking and fixing the sliding plate (27) and the guide cross beam.

3. A plate unit assembly welding system in a bridge steel structure according to claim 2, characterized in that: The sliding plate manual locking assembly (3) comprises a fixed guide sleeve (22), an adjusting screw (20), a gland (26), a toothed locking block (18), a translational shaft (29) and a flat key. The inner wall of the fixed guide sleeve (22) is in a stepped structure, the end with a larger inner diameter is a fixed guide sleeve (22) inner hole, an axial sliding groove (30) is arranged on the inner hole wall, and the end with a smaller inner diameter is a threaded hole; the translational shaft (29) is installed in cooperation with the inner hole of the fixed guide sleeve (22), the translational shaft (29) is provided with a flat key (25), the flat key (25) slides in the sliding groove (30); one end of the translational shaft (29) is fixedly connected with the toothed locking block (18), the other end of the translational shaft (29) is provided with a center groove and fixedly connected with an annular gland (26), one end of the adjusting screw (20) is provided with an annular groove (28), the end of the adjusting screw (20) passes through the inner ring of the gland (26) and enters the center groove of the translational shaft (29), and the gland (26) is clamped in the annular groove (28); the thread of the adjusting screw (20) is in meshing connection with the thread of the threaded hole of the fixed guide sleeve (22); the toothed locking block (18) is in meshing and matching with the triangular toothed rack (17); the translational shaft (29) and the flat key (25) are used to limit the toothed locking block (18) from rotating with the adjusting screw (20), the translational shaft (29) can only translate and cannot rotate; the adjusting screw (20) can rotate relative to the translational shaft, but cannot produce translational motion with the translational shaft; by manually rotating the adjusting screw (20), the toothed locking block (18) is extended and retracted, and the triangular toothed rack (17) is locked and loosened.

4. A plate unit assembly welding system in a bridge steel structure according to claim 2, characterized in that: The upper cross plate (14) in the cross beam assembly (1) is provided with a rack (33) which is in meshing with a walking gear (34) in the sliding plate electric drive assembly (2); the sliding plate electric drive assembly (2) is connected to the sliding plate (27) of the cross beam assembly (1) through a speed reducer mounting plate (35), is driven by a servo motor (31), is transmitted by a precision planetary reducer (32), and the walking gear (34) is installed on the output shaft of the precision planetary reducer (32).

5. A plate unit assembly welding system in a bridge steel structure according to claim 1 or 2, characterized in that: The plate type rib assembly positioning device (6) is connected to the integral guide plate (43) in the compression guide device (4) through the connecting bracket (61), and moves with the up and down movement of the integral guide plate (43); the plate type rib assembly positioning device (6) contains a tool support (62), an adjustable upper compression wheel (70), a fixed side compression wheel (71) and a movable side compression wheel (72); the tool support is connected to the connecting bracket (61) through two fixed pin shafts (63), and each side of the fixed pin shaft (63) on the connecting bracket (61) has a group of positioning pin holes; two plug-in positioning pins (64) are used to fix the tool support (62) at 0° and 180° positions; when the plate type rib assembly positioning device (6) is needed, the tool support (62) is installed at the 0° position, and the positioning pin is inserted into the corresponding positioning pin hole; when the U type rib assembly positioning device is needed, the tool support is installed at the 180° position, and the plug-in positioning pin (64) is inserted into the corresponding positioning pin hole; the adjustable upper compression wheel (70) is installed on a group of guide seats one (67), a trapezoidal lead screw (66) is connected to the middle position of the guide seat one (67), the trapezoidal lead screw (66) is fixed on the tool support (62) through a lead screw nut (68), and two guide shafts one (65) are connected to the two sides of the guide seat one (67), respectively; the two guide shafts one (65) are fixed on the tool support (62) through two groups of guide shaft sleeves one (69); the trapezoidal lead screw (66) is manually rotated to drive the guide seat one (67) to move along the axis direction of the trapezoidal lead screw (66), and the guide seat one (67) cannot move horizontally or rotate.

6. A method of assembling and welding a plate unit in a bridge steel structure using the plate unit assembling and welding system according to claim 5, characterized by: The plate unit assembly includes assembling and positioning and spot welding the U-shaped rib workpiece or the plate-shaped rib workpiece with the bottom plate; for the U-shaped rib workpiece, the U-shaped rib assembly positioning device (5) is used to position between the U-shaped rib workpiece and the bottom plate, first, the slide plate (27) of the cross beam assembly (1) is driven by the slide plate electric drive assembly (2) to move, the middle line position of the profiled insert plate (50) on both sides of the U-shaped rib assembly positioning device (5) is coincided with the middle line position of the U-shaped rib workpiece, then the profiled insert plate (50) is driven by the hydraulic cylinder one (41) in the pressure guiding device (4) to move downward to the profiled insert plate working surface to contact the outer contour surface of the U-shaped rib workpiece, when the U-shaped rib workpiece is positioned and pressed to meet the required size, the U-shaped rib assembly positioning device (5) is adjusted, and the assembling and positioning and spot welding between the U-shaped rib workpiece and the bottom plate are carried out; for the plate-shaped rib workpiece, the plate-shaped rib assembly positioning device (6) is used to position between the plate-shaped rib workpiece and the bottom plate, first, the fixed side pressure wheel (71) is moved to tightly contact one side surface of the plate-shaped rib workpiece by the slide plate (27) driven by the slide plate electric drive assembly (2), the movable side pressure wheel (72) is installed on a group of top pressing supports (75), then the hydraulic cylinder two (76) connected with the top pressing support (75) is controlled to act, the movable side pressure wheel (72) is pushed to tightly press the other side surface of the plate-shaped rib workpiece, the hydraulic cylinder one (41) in the pressure guiding device (4) is controlled to act, the tool support (62) and the adjustable upper pressure wheel (70) are driven to move downward, when the stroke of the hydraulic cylinder one (41) does not meet the working condition, the trapezoidal lead screw (66) on the guiding seat one (67) is adjusted, the position of the adjustable upper pressure wheel (70) is continuously adjusted downward, until the adjustable upper pressure wheel (70) contacts the plate thickness section of the plate-shaped rib workpiece, the plate-shaped rib assembly positioning device (6) is adjusted, and the assembling and positioning and spot welding between the plate-shaped rib workpiece and the bottom plate are carried out.

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