A fully automatic welding device and method for stirrups and U-shaped steel bars

Abstract

The present invention discloses a fully automatic welding device and method for stirrups and U-shaped steel bars. The lower end of the frame is buried in a building pit, and the part of the frame in contact with the ground is fixed to the ground by a fixed bracket. The device also includes an upper welding head assembly and a lower welding head assembly. The upper and lower ends of the frame are respectively fixed with a frame slide rail assembly, and the upper welding head assembly and the lower welding head assembly are respectively slidably connected to the frame slide rail assembly. The upper welding head assembly and the lower welding head assembly are arranged relative to each other. Through the cooperation of the upper welding head assembly and the lower welding head assembly, the present invention can not only meet the demand for simultaneous welding of multiple layers and multiple welding points of steel cages in production line automation, realize automatic control, and greatly improve efficiency, but also can adapt to the changes in different steel cage heights, lengths, longitudinal spacings, transverse spacings, and diameters of welded steel bars in actual production, and can realize continuous production. The quality of welded products is stable, and high-intensity manual work is not required, which greatly improves production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of building steel bar welding, and in particular to a fully automatic welding device and method for stirrups and U-shaped steel bars. Background Art

[0002] Rebar is widely used in construction. When building a house, the steel bars are first assembled into a cage before grouting to form walls and other structures. Rebar welding is a necessary step in constructing the cage. Rebar welding involves using electric welding equipment to connect the steel bars axially or crosswise. The quality of rebar welding is closely related to the weldability of the steel and the welding process. Weldability is influenced by the steel's alloying elements, such as carbon, manganese, and titanium.

[0003] With the development of industries such as aerospace, electronics, automotive, and household appliances, resistance welding has gained increasing attention. This has also led to higher demands for resistance welding quality. Currently available resistance welding methods include the following: 1. Spot welding: This method involves assembling the workpieces into overlapping joints and pressing them between two cylindrical electrodes. Resistance heat is used to melt the base metal, forming a weld spot. Spot welding is primarily used for welding thin sheets. 2. Seam welding: This method is similar to spot welding, except that a rotating disc-shaped roller electrode replaces the cylindrical electrode. The workpieces are assembled into overlapping or butt joints and placed between two roller electrodes. The rollers pressurize the workpieces and rotate, applying power continuously or intermittently to form a continuous weld. Seam welding is mainly used for welding structures with relatively regular welds and requiring sealing, and the plate thickness is generally less than 3mm; 3. Resistance butt welding: Resistance butt welding is a method of assembling the weldments into a butt joint, making their end faces in close contact, using resistance heat to heat them to a plastic state, and then turning off the power and quickly applying a forging force to complete the welding; 4. Flash butt welding: Flash butt welding is a method of assembling the weldments into a butt joint, turning on the power, making their end faces gradually move closer to achieve local contact, using resistance heat to heat these contact points, and under the action of large current, generating flashes, causing the end face metal to melt until the end reaches a predetermined temperature within a certain depth range, and then turning off the power and quickly applying a forging force to complete the welding; 5. Projection welding: There are prefabricated convex points on a workpiece. During projection welding, one or more molten cores can be formed at the joint at one time.

[0004] In the existing technology, resistance welding is widely used in the field of steel bar welding on the market. On the automated production line, due to structural limitations, this method is only applicable to the situation where only one welding point is required on the axis, and cannot meet the demand for simultaneous automated welding of multiple welding points. For example, the welding of the upper and lower layers of steel stirrups on the steel cage needs to be realized at the same time to better improve the welding efficiency; the existing stirrup welding, and most of the construction steel bar welding equipment on the market are manual welding, with many steps, difficult to control the welding process, low efficiency, unstable product quality, high labor intensity, reduced welding work efficiency, and delayed the progress of welding processing.

[0005] Therefore, designing a fully automatic welding device and method for stirrups and U-shaped steel bars has become a direction for further improvement. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides a fully automatic welding device and method for stirrups and U-shaped steel bars, which can meet the needs of simultaneous automated welding of multiple layers of welding points, and can achieve welding of upper and lower layers of steel bars during one transportation process, and can weld a formed steel cage in one time.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] The upper and lower ends of the frame are fixed with a frame slide rail assembly, and the upper and lower welding head assemblies are respectively slidably connected to the frame slide rail assembly. The upper welding head assembly and the lower welding head assembly are relatively arranged. The upper welding head assembly and the lower welding head assembly are relatively arranged. The upper welding head assembly includes a fixed frame, a conductive assembly, a back plate, a right-angle guide plate, a Z-axis cylinder, an upper electrode assembly, a lower electrode assembly, an X-axis moving assembly and a Y-axis moving assembly. The conductive assembly is fixedly installed on the fixed frame, one side of the conductive assembly is movably connected to the right-angle guide plate, one side of the back plate is provided with a Z-axis slide rail assembly, the back side of the right-angle guide plate is slidably connected to the Z-axis slide rail assembly, and the other side of the back plate is fixedly connected to the fixed frame. The X-axis moving assembly is fixedly installed on the right-angle guide plate, the Y-axis moving assembly is fixedly installed on the upper end of the X-axis moving assembly, and the Y-axis moving assembly is provided with a mounting frame. There is a Z-axis cylinder, the output shaft of the Z-axis cylinder is rotatably connected to the lower electrode assembly through a movable part, the lower electrode assembly is adapted to be installed on the upper electrode assembly, and the upper electrode assembly is fixedly connected to the conductive assembly; the lower welding head assembly includes a pre-alignment assembly, a fixed frame, a conductive assembly, a back plate, a right-angle guide plate, a Z-axis cylinder, an upper electrode assembly, a lower electrode assembly, an X-axis moving assembly and a Y-axis moving assembly, the conductive assembly is fixedly installed on the fixed frame, one side of the conductive assembly is movably connected to the right-angle guide plate, a Z-axis slide rail assembly is provided on one side of the back plate, the back side of the right-angle guide plate is slidably connected to the Z-axis slide rail assembly, and the other side of the back plate is fixedly connected to the fixed frame, the X-axis moving assembly and the pre-alignment assembly are fixedly installed on the right-angle guide plate on the lower welding head assembly, the Y-axis moving assembly is fixedly installed on the upper end of the X-axis moving assembly, a mounting frame is provided on the Y-axis moving assembly, and the Z-axis cylinder is fixedly installed on the upper end of the mounting frame, the output shaft of the Z-axis cylinder is rotatably connected to the lower electrode assembly through a movable part, the lower electrode assembly is adapted to be installed on the upper electrode assembly, and the upper electrode assembly is fixedly connected to the conductive assembly.

[0009] Preferably, the pre-alignment assembly includes a pre-alignment plate, an alignment cylinder and a mounting seat. The mounting seat and the alignment cylinder are fixed on the right-angle guide plate on the lower welding head assembly. The output shaft of the alignment cylinder is fixedly connected to the pre-alignment plate through a clamping block. The pre-alignment plate is slidably inserted into the inner side of the mounting seat, and a gap is left between it and the inner side of the mounting seat.

[0010] Preferably, the lower electrode assembly includes a lower electrode rod 1, a lower electrode rod 2, a protective cover and a lower electrode head, the lower electrode rod 1 is connected to the movable part, a lower end of the lower electrode rod is fixedly connected to the lower electrode rod 2, the lower electrode rod 2 is provided with a protective cover, and the lower end of the lower electrode rod 2 is fixedly connected to the lower electrode head; the upper electrode assembly includes an upper electrode rod, an insulating gasket and an upper electrode head, the upper electrode rod is adaptively arranged on the outer periphery of the protective cover, an insulating gasket is provided on the inner side of the upper end of the upper electrode rod, and the insulating gasket is fitted with the upper end of the protective cover; the lower end of the upper electrode rod is fixedly connected to the upper electrode head, and an insulating gasket is provided between the upper electrode head and the lower electrode rod 2.

[0011] Preferably, the conductive component includes a transformer, a first hard copper bar, a first soft copper bar, a second hard copper bar, a second soft copper bar, a third soft copper bar, a fourth hard copper bar and a fifth hard copper bar. The transformer is fixed on the fixed frame, and the output end of the transformer is fixedly connected to the first hard copper bar arranged oppositely, one side of the first hard copper bar is fixedly connected to one end of the first soft copper bar, and the other end of the first soft copper bar is fixedly connected to the second hard copper bar. One side of the second hard copper bar is slidably connected to the right-angle guide plate through a slider assembly, the second hard copper bar is fixedly connected to the second soft copper bar and the third soft copper bar respectively, one end of the second soft copper bar is fixedly connected to the fourth hard copper bar, the lower end of the fourth hard copper bar is fixedly connected to the upper electrode rod, one end of the third soft copper bar is fixedly connected to the fifth hard copper bar, and one end of the fifth hard copper bar is fixedly connected to the lower electrode rod.

[0012] Preferably, it also includes a screw assembly, which includes a screw nut and a screw, the screw nut is fixed to the bottom of the right-angle guide plate, and the screw is fixed to the back plate.

[0013] Preferably, the Y-direction moving component includes a Y-direction guide plate, a Y-direction cylinder, a Y-direction linear guide rail and a Y-direction guide seat, and the Y-direction cylinder and the Y-direction guide seat are respectively fixed on the Y-direction guide plate, and the output end of the Y-direction cylinder is transmission-connected to the Y-direction linear guide rail, and the Y-direction linear guide rail is fixed to the bottom of the Y-direction guide plate; a through hole is opened on the Y-direction guide seat, and the lower electrode rod passes through the through hole with a gap between the through hole, and the Y-direction guide seat is clamped on the outside of the upper electrode rod, and the upper end of the Y-direction guide seat is fixedly connected to the fourth hard copper bar, and one end of the fourth hard copper bar is fixed to the upper electrode rod.

[0014] Preferably, the X-direction moving assembly includes an X-direction guide plate, an X-direction cylinder and an X-direction linear guide rail. The X-direction cylinder is fixed parallel to the right-angle guide plate, and the output end of the X-direction cylinder is transmission-connected to the X-direction linear guide rail. The Y-direction guide plate is fixedly mounted on the X-direction linear guide rail.

[0015] Preferably, the movable part includes a fisheye joint and a positioning pin, the upper end of the fisheye joint is fixedly connected to the Z-direction cylinder output shaft, and the lower end of the fisheye joint is pin-connected to the upper end of the lower electrode rod through the positioning pin.

[0016] Preferably, a fixing part is fixed to the upper part of the lower electrode rod, and the fixing part includes a fixing plate and a linear bearing. One side of the fixing plate is fixed to the outer side of the lower electrode rod by a bolt, and a mounting hole is opened on the other side of the fixing plate. A linear bearing is fixed in the mounting hole, and a guide rod is movably sleeved in the linear bearing.

[0017] The present invention also provides a stirrup and U-shaped steel bar full-automatic welding method, which is characterized by being applied to the stirrup and U-shaped steel bar full-automatic welding equipment as described above, comprising the following steps:

[0018] S1: The automatic welding equipment receives a positioning completion signal, and the upper welding head assembly and the lower welding head assembly are driven downward by the frame slide rail assembly to the designated welding position. The upper electrode assembly and the lower electrode assembly of the upper welding head assembly and the lower welding head assembly are driven by the screw assembly to move as a whole to the pre-positioned position for controlling the position of the U-shaped steel bar. The lower welding head assembly is used to weld the lower stirrups to the U-shaped steel bar, and at the same time, the upper and lower steel grids are tensioned.

[0019] S2: The alignment cylinder extends, driving the pre-alignment plate to rise and push the stirrups to the designated position;

[0020] S3: The upper electrode assembly and the lower electrode assembly of the upper welding head assembly and the lower welding head assembly are moved as a whole to the welding preparation position under the drive of the screw assembly, and the alignment cylinder retracts, driving the pre-alignment plate to descend to its original position;

[0021] S4: The upper welding head assembly and the lower welding head assembly drive the stirrups and U-shaped steel bars to the welding position. The upper welding head assembly tightens the stirrups and U-shaped steel bars of the upper grid, and the lower welding head assembly tightens the stirrups and U-shaped steel bars of the lower grid, preparing for power welding.

[0022] S5: Based on S4, the upper electrode head and the lower electrode head of the upper welding head assembly are energized and connected, generating a strong current to weld the steel bars, that is, the upper electrode head and the lower electrode head move according to the specific on-site work requirements, and both electrode heads descend to the welding point, and after completing the compression, the welding is energized. After the upper grid stirrups and U-shaped steel bars are welded, the upper welding head assembly is powered off. If the width of the steel cage required in actual production is relatively large, several groups of upper welding head assemblies can be set on the frame slide rail assembly, and multiple groups of upper welding head assemblies can weld the upper stirrups and U-shaped steel bars at the same time;

[0023] S6: Based on S4, the upper electrode head and the lower electrode head of the lower welding head assembly are energized and connected, generating a strong current to weld the steel bars, that is, the upper electrode head and the lower electrode head move according to the specific on-site work requirements, and both electrode heads descend to the welding point, and after completing the compression, the welding is energized. After the stirrups of the lower grid and the U-shaped steel bars are welded, the lower welding head assembly is powered off. If the width of the steel cage required in actual production is relatively large, several groups of lower welding head assemblies can be set on the frame slide rail assembly, and multiple groups of lower welding head assemblies can weld the upper stirrups and U-shaped steel bars at the same time;

[0024] S7: Based on S5, after all upper welding head assemblies and upper stirrups are welded, the upper electrode head and the lower electrode head can be withdrawn from the same side of the welding point. The upper welding head assembly releases the stirrups and U-shaped steel bars and moves to the origin position to wait.

[0025] S8: Based on S6, after all lower welding head assemblies and lower stirrups are welded, the upper and lower electrode heads can be withdrawn from the same side of the welding point. The lower welding head assembly releases the stirrups and U-shaped steel bars and moves to the origin position to wait.

[0026] S9: After the welded stirrups are removed, repeat S1 to S8 until the steel cage welding is completed and all upper welding head assemblies and lower welding head assemblies return to their original positions.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The present invention sets an upper welding head assembly and a lower welding head assembly in relative positions on the frame. When receiving a positioning completion signal, the upper welding head assembly and the lower welding head assembly are driven by the frame slide rail assembly to move to the welding position. The upper electrode assembly and the lower electrode assembly of the upper welding head assembly and the lower welding head assembly are driven by the screw rod assembly to move as a whole to the pre-alignment position. The alignment cylinder extends to drive the pre-alignment plate to rise. The upper welding head assembly and the lower welding head assembly can weld simultaneously or in turn according to the voltage conditions at the work site. Due to the cooperation of the upper welding head assembly and the lower welding head assembly, it can not only meet the requirements of simultaneous welding of multiple layers and multiple welding points of the steel cage in the production line automation, realize automatic control, greatly improve efficiency, but also adapt to the changes in the height, length, longitudinal spacing, transverse spacing and diameter of the welded steel bars of different steel cages in actual production;

[0029] (2) The overall welding process of the present invention is simple, efficient, stable and reliable, and can achieve continuous production. The quality of welded products is stable, and no manual strength work is required, which speeds up the welding process and greatly improves production efficiency.

[0030] (3) The upper and lower electrode heads can move according to specific work requirements. During welding, both electrode heads move down to the welding point and are powered on after being pressed. After welding is completed, both electrode heads can be pulled out from the welding point on the same side. The movements are diverse and the control is flexible.

[0031] (4) When the Z-direction cylinder in the present invention extends, it drives the upper electrode rod to push the lower electrode rod downward, so that the lower electrode head fixed at the lower end of the lower electrode rod can be pushed downward together, and the distance between the lower electrode head and the upper electrode head increases. Through multi-directional movement in the X, Y and Z directions, it moves accurately to the welding point, and then the Z-direction cylinder retracts, driving the lower electrode head to lift up, clamping the welding point, and then proceeding to the next step of fusion welding. This method can adapt to the welding of stirrups of different sizes, and the welding point positioning is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0033] Figure 2 It is the front view of the present invention.

[0034] Figure 3 It is a left view of the present invention.

[0035] Figure 4 It is a schematic diagram of the overall structure of the upper welding head assembly of the present invention.

[0036] Figure 5 For the present invention Figure 4 Schematic diagram of the right side structure without the mounting frame and reinforcement ribs.

[0037] Figure 6 For the present invention Figure 4 Schematic diagram of the left side structure without the mounting frame and reinforcement ribs.

[0038] Figure 7 For the present invention Figure 4 Front cross-sectional view of .

[0039] Figure 8 For the present invention Figure 4 Right side view without mounting bracket and reinforcement ribs.

[0040] Figure 9 For the present invention Figure 1 Enlarged view of point A in the middle.

[0041] Figure 10 It is a front view of the pre-alignment component of the present invention.

[0042] Figure 11 For the present invention Figure 7 Enlarged view of point B in the middle. DETAILED DESCRIPTION

[0043] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0044] like Figures 1 to 11 As shown, a stirrup and U-shaped steel bar fully automatic welding equipment and method, including a frame 1, a fixed bracket 102, a frame slide rail assembly 103, a frame slide rail driving device 104, an upper welding head assembly 2, a lower welding head assembly 3, a fixed frame 401, a back plate 402, a Z-direction slide rail assembly 403, a right-angle guide plate 404, a mounting frame 5, a Z-direction cylinder 6, a guide rod 7, an upper electrode rod 801, an insulating gasket 802, an upper electrode head 803, a lower electrode rod 1 901, a lower electrode rod 2 902, a protective cover 903, a lower electrode head 904, a transformer 10, a first Hard copper busbar 11, first soft copper busbar 12, second hard copper busbar 13, second soft copper busbar 14, third soft copper busbar 15, fourth hard copper busbar 16, fifth hard copper busbar 17, screw assembly 18, X-direction guide plate 19, X-direction cylinder 20, X-direction linear guide 21, Y-direction guide plate 22, Y-direction cylinder 23, Y-direction linear guide 24, Y-direction guide seat 25, fisheye joint 26, locating pin 27, fixing plate 28, linear bearing 29, slider assembly 30, slide rail cylinder 31, reinforcing rib 32, pre-alignment plate 3301, alignment cylinder 3302 and mounting seat 3303.

[0045] The lower end of the frame 1 is buried in the building pit, and the part of the frame 1 in contact with the ground is fixed to the ground through a fixed bracket 102. The upper and lower ends of the frame 1 are respectively fixed with a frame slide rail assembly 103, and the frame slide rail assembly 103 is driven by a frame slide rail driving device 104. The upper welding head assembly 2 and the lower welding head assembly 3 are respectively slidably connected on the frame slide rail assembly 103. The upper welding head assembly 2 and the lower welding head assembly 3 are arranged relative to each other. The upper welding head assembly 2 includes a fixed frame 401, a conductive assembly, a back plate 402, a right-angle guide plate 404, a Z-direction cylinder 6, an upper electrode assembly, a lower electrode assembly, an X-direction moving assembly and a Y-direction moving assembly. A conductive component is installed, one side of the conductive component is movably connected to the right-angle guide plate 404, a Z-direction slide rail component 403 is provided on one side of the back plate 402, the back side of the right-angle guide plate 404 is slidably connected to the Z-direction slide rail component 403, the other side of the back plate 402 is fixedly connected to the fixed frame 401, an X-direction moving component is fixedly installed on the right-angle guide plate 404, a Y-direction moving component is fixedly installed on the upper end of the X-direction moving component, a mounting frame 5 is provided on the Y-direction moving component, a Z-direction cylinder 6 is fixedly installed on the upper end of the mounting frame 5, the output shaft of the Z-direction cylinder 6 is rotatably connected to the lower electrode assembly through a movable part, the lower electrode assembly is adapted to be installed on the upper electrode assembly, and the upper electrode assembly is fixedly connected to the conductive component.

[0046] The lower welding head assembly 3 includes a pre-alignment assembly, a fixed frame 401, a conductive assembly, a back plate 402, a right-angle guide plate 404, a Z-axis cylinder 6, an upper electrode assembly, a lower electrode assembly, an X-axis moving assembly and a Y-axis moving assembly. The fixed frame 401 is fixedly mounted with a conductive assembly, one side of the conductive assembly is movably connected to the right-angle guide plate 404, one side of the back plate 402 is provided with a Z-axis slide rail assembly 403, the back side of the right-angle guide plate 404 is slidably connected to the Z-axis slide rail assembly 403, and the other side of the back plate 402 is fixedly connected to the fixed frame 401. The right-angle guide plate 404 on the lower welding head assembly 3 is fixedly mounted with an X-axis moving assembly and a pre-alignment assembly 33, the upper end of the X-axis moving assembly is fixedly mounted with a Y-axis moving assembly, and the Y-axis moving assembly is provided with a mounting frame 5. The upper end of the mounting frame 5 is fixedly mounted with a Z-axis cylinder 6, and the output shaft of the Z-axis cylinder 6 is rotatably connected to the lower electrode assembly through a movable part. The lower electrode assembly is adaptably mounted on the upper electrode assembly, and the upper electrode assembly is fixedly connected to the conductive assembly. In the actual working process, at least one set of upper welding head assemblies 2 and one set of lower welding head assemblies 3 need to be set on the frame 1 to realize the welding of the upper and lower layers of steel grids. In this embodiment, the width of the steel cage to be welded is larger by default, so this embodiment has four sets of upper welding head assemblies 2 and four sets of lower welding head assemblies 3 respectively set at the upper and lower ends of the frame 1.

[0047] It needs to be explained that, in the present invention, since the fixing frame 401, the conductive component, the back plate 402, the right-angle guide plate 404, the Z-axis cylinder 6, the upper electrode assembly, the lower electrode assembly, the X-axis moving assembly and the Y-axis moving assembly are all components of the same specifications, there are only slight differences in the forward and reverse order of installation, so the present invention does not use different serial numbers to mark the names of the above components; the appearance of the mounting frame 5 in the upper welding head assembly 2 and the lower welding head assembly 3 is slightly different, but the present invention does not improve the structure of the mounting frame 5. The mounting frame 5 is some standard mounting parts on the market, and whether it is the mounting frame 5 of the upper welding head assembly 2 or the lower welding head 3, it is to provide stable support for the Z-axis cylinder 6, so the present invention does not distinguish the mounting frame 5.

[0048] The pre-alignment assembly includes a pre-alignment plate 3301, an alignment cylinder 3302 and a mounting seat 3303. The mounting seat 3303 and the alignment cylinder 3302 are fixed on the right-angle guide plate 404 on the lower welding head assembly 3. The output shaft of the alignment cylinder 3302 is fixedly connected to the pre-alignment plate 3301 through a clamping block. The pre-alignment plate 3301 is inserted into the inner side of the mounting seat 3303 and is slidably connected to the mounting seat 3303, and a gap is left between the pre-alignment plate 3301 and the inner side of the mounting seat 3303. Figure 1 As shown, four groups of lower welding head assemblies 3 are provided in this embodiment, but only one group of pre-alignment assemblies needs to be provided on the lower welding head assembly 3 in the middle part to realize the control of the position of the entire U-shaped steel bar.

[0049] The upper electrode assembly includes an upper electrode rod 801, an insulating gasket 802 and an upper electrode head 803. The upper electrode rod 801 is adapted to be mounted on the outer periphery of the protective cover 903. An insulating gasket 802 is provided on the inner side of the upper end of the upper electrode rod 801, and the insulating gasket 802 is fitted with the upper end of the protective cover 903. The lower end of the upper electrode rod 801 is fixedly connected to the upper electrode head 803, and an insulating gasket 802 is attached between the upper electrode head 803 and the lower electrode rod 902, so that the upper electrode assembly and the lower electrode assembly are relatively insulated, and no interference occurs during welding.

[0050] The lower electrode assembly includes a lower electrode rod 1 901, a lower electrode rod 2 902, a protective cover 903 and a lower electrode head 904. The lower electrode rod 1 901 is connected to the movable part. The lower end of the lower electrode rod 1 901 is fixedly connected to the lower electrode rod 2 902. The lower electrode rod 2 902 is covered with a protective cover 903. The protective cover 903 can be used to protect the lower electrode rod 2 902 and improve the service life of the lower electrode rod 2 902. The lower end of the lower electrode rod 2 902 is fixedly connected to the lower electrode head 904.

[0051] The upper electrode head 803 and the lower electrode head 904 can move according to specific work requirements. During welding, both electrode heads move downward to the welding point, and after completing the compression, they are energized for welding. After welding is completed, both electrode heads can be pulled out from the welding point on the same side. The movements are diverse and the control is flexible.

[0052] The conductive component includes a transformer 10, a first hard copper bar 11, a first soft copper bar 12, a second hard copper bar 13, a second soft copper bar 14, a third soft copper bar 15, a fourth hard copper bar 16 and a fifth hard copper bar 17. The transformer 10 is fixed on the fixing frame 401. The output end of the transformer 10 is fixedly connected to the first hard copper bar 11 arranged opposite to it. One side of the first hard copper bar 11 is fixedly connected to one end of the first soft copper bar 12. The other end of the first soft copper bar 12 is fixedly connected to the second hard copper bar 13. One side of the second hard copper bar 13 is slidably connected to the right-angle guide plate 404 through the slider assembly 30. The second The hard copper bar 13 is fixedly connected to the second soft copper bar 14 and the third soft copper bar 15 respectively, one end of the second soft copper bar 14 is fixedly connected to the fourth hard copper bar 16, the lower end of the fourth hard copper bar 16 is fixedly connected to the upper electrode rod 801, one end of the third soft copper bar 15 is fixedly connected to the fifth hard copper bar 17, and one end of the fifth hard copper bar 17 is fixedly connected to the lower electrode rod 901. When the lower electrode rod 901 is energized, when the Z-axis cylinder 6 lifts or lowers the lower electrode assembly and the upper electrode assembly, the relative positions of the third soft copper bar 15 and the fifth hard copper bar 17 and the right-angle guide plate 404 can be kept stable.

[0053] It also includes a screw assembly 18, which includes a screw nut and a screw. The screw nut is fixed to the bottom of the right-angle guide plate 404, and the screw is fixed on the back plate 402. The screw is arranged in parallel with the Z-axis slide rail assembly 403, and the screw assembly 18 and the lower electrode assembly are arranged on the same straight line, and cooperate with the Z-axis slide rail assembly 403 to ensure that the right-angle guide plate 404 can move up and down within the specified range of motion of the slide rail assembly 3, and also ensure that the up and down linear motion of the upper electrode assembly and the lower electrode assembly meets the expected standard settings.

[0054] The Y-direction moving assembly includes a Y-direction guide plate 22, a Y-direction cylinder 23, a Y-direction linear guide 24 and a Y-direction guide seat 25. The Y-direction cylinder 23 and the Y-direction guide seat 25 are respectively fixed on the Y-direction guide plate 22. The output end of the Y-direction cylinder 23 is transmission-connected with the Y-direction linear guide 24. The Y-direction linear guide 24 is fixed to the bottom of the Y-direction guide plate 22. A through hole is opened on the Y-direction guide seat 25. The lower electrode rod 901 passes through the through hole with a gap between the through hole. The Y-direction guide seat 25 is clamped on the outside of the upper electrode rod 801. The upper end of the Y-direction guide seat 25 is fixedly connected to the fourth hard copper bar 16, and one end of the fourth hard copper bar 16 is fixed to the upper electrode rod 801, so that the fourth hard copper bar 16 and the upper electrode rod 801 can be energized with each other.

[0055] The lower electrode rod 902 can slide in the upper electrode rod 801. When the Z-axis cylinder 6 extends, it drives the lower electrode rod 901 to push the lower electrode rod 902 downward, so that the lower electrode head 904 fixed at the lower end of the lower electrode rod 902 can be pushed downward together. The distance between the lower electrode head 904 and the upper electrode head 803 increases, and by moving in other directions, it moves to the welding point. Then the Z-axis cylinder 6 retracts, driving the lower electrode head 904 to lift up, clamping the welding point, and then proceeding to the next step of fusion welding. This method can adapt to the welding of stirrups of different sizes.

[0056] The X-direction moving assembly includes an X-direction guide plate 19, an X-direction cylinder 20 and an X-direction linear guide rail 21. The X-direction cylinder 20 is fixedly arranged parallel to the right-angle guide plate 404. The output end of the X-direction cylinder 20 is transmission-connected to the X-direction linear guide rail 21. The Y-direction guide plate 22 is fixedly mounted on the X-direction linear guide rail 21.

[0057] The movable parts include a fisheye joint 26 and a locating pin 27. The upper end of the fisheye joint 26 is fixedly connected to the output shaft of the Z-direction cylinder 6, and the lower end of the fisheye joint 26 is pinned to the upper end of the lower electrode rod 901 through the locating pin 27. When the upper electrode assembly and the lower electrode assembly move back and forth on the Y-direction linear guide 24, the mutual cooperation between the fisheye joint 26 and the locating pin 27 can reduce the slight position deviation caused by the back and forth movement, so that the Z-direction cylinder 6 and the upper electrode assembly and the lower electrode assembly maintain coaxiality, allowing the welding point to move more accurately and improving the accuracy of the overall welding.

[0058] Specifically, during operation, the upper welding head assembly 2 and the lower welding head assembly 3 move to the welding position, and the upper electrode assembly and the lower electrode assembly slide along the Z-direction slide rail assembly 403 driven by the screw assembly 18, and the entire assembly descends to the welding preparation position;

[0059] According to the actual welding requirements, if the welding point is on the right side, the X-direction cylinder 20 near the back plate 402 is retracted, driving the upper electrode assembly and the lower electrode assembly to move right to the X-direction welding position; if the welding point is on the left side, the X-direction cylinder 20 provided on the outside is retracted, driving the upper electrode assembly and the lower electrode assembly to move left to the X-direction welding position; at the same time, if the welding point is on the left side, the X-direction cylinder 20 near the back plate 402 is extended, driving the upper electrode assembly and the lower electrode assembly to move right to the X-direction welding position; if the welding point is on the right side, the X-direction cylinder 20 provided on the outside is extended, driving the upper electrode assembly and the lower electrode assembly to move right to the X-direction welding position;

[0060] Then the Y-direction cylinder 23 extends, driving the upper electrode assembly and the lower electrode assembly to move forward to the Y-direction welding position; the upper electrode assembly and the lower electrode assembly are driven by the screw assembly 18 to descend to the welding position, and the Z-direction cylinder 6 retracts, driving the lower electrode head 904 to rise and press the welding machine steel bar;

[0061] Then, the transformer 10 is energized, and the upper electrode assembly and the lower electrode assembly are energized and connected, generating a strong current to weld the steel bars;

[0062] After welding is completed, the Z-direction cylinder 6 extends, driving the lower electrode head 904 to descend, and the screw assembly 18 drives the upper electrode assembly and the lower electrode assembly to rise along the Z-direction slide assembly 403 to the welding preparation position;

[0063] The lead screw assembly 18 then drives the upper and lower electrodes to rise to the origin position, and thus the welding work of the upper welding head assembly 2 or the lower welding head assembly 3 is completed.

[0064] A fixing part is fixed to the upper part of the lower electrode rod 901. Specifically, the fixing part includes a fixing plate 28 and a linear bearing 29. One side of the fixing plate 28 is fixed to the outer side of the lower electrode rod 901 by bolts, and the other side of the fixing plate 28 is provided with a mounting hole. A linear bearing 29 is fixed in the mounting hole. A guide rod 7 is movably sleeved in the linear bearing 29. The bottom of the guide rod 7 is fixedly connected to the Y-direction moving component. When the Z-direction cylinder 6 extends or retracts, it drives the lower electrode rod 901 to be positioned up and down along the direction of the guide rod 7.

[0065] A fully automatic welding method for stirrups and U-shaped steel bars, applied to the fully automatic welding equipment for stirrups and U-shaped steel bars in the above embodiment, comprises the following steps:

[0066] S1: The automatic welding equipment receives a positioning completion signal, and the upper welding head assembly 2 and the lower welding head assembly 3 are driven downward by the frame slide rail assembly 103 to the designated welding position. The upper electrode assembly and the lower electrode assembly of the upper welding head assembly 2 and the lower welding head assembly 3 are driven by the screw assembly to move as a whole to the pre-alignment position;

[0067] S2: The alignment cylinder 3302 extends, driving the pre-alignment plate 3301 to rise, pushing the stirrups to the designated position;

[0068] S3: The upper electrode assembly and the lower electrode assembly of the upper welding head assembly 2 and the lower welding head assembly 3 are driven by the screw assembly to descend to the welding preparation position as a whole, and the alignment cylinder 3302 retracts, driving the pre-alignment plate 3301 to descend to its original position;

[0069] S4: The upper welding head assembly 2 and the lower welding head assembly 3 drive the stirrups and U-shaped steel bars to the welding position. The upper welding head assembly 2 tightens the stirrups and U-shaped steel bars of the upper grid, and the lower welding head assembly 3 tightens the stirrups and U-shaped steel bars of the lower grid, preparing for power welding.

[0070] S5: Based on S4, the upper electrode head 803 and the lower electrode head 904 of the upper welding head assembly 2 are energized and turned on, generating a strong current to weld the steel bars, that is, the upper electrode head 803 and the lower electrode head 904 move according to the specific on-site work requirements, and both electrode heads descend to the welding point, and after completing the compaction, the welding is energized. After the stirrups of the upper grid and the U-shaped steel bars are welded, the upper welding head assembly 2 is powered off. If the width of the steel cage required in actual production is relatively large, several groups of upper welding head assemblies 2 can be set on the frame slide rail assembly 103, and multiple groups of upper welding head assemblies 2 can weld the upper stirrups and the U-shaped steel bars at the same time;

[0071] S6: Based on S4, the upper electrode head 803 and the lower electrode head 904 of the lower welding head assembly 3 are energized and turned on, generating a strong current to weld the steel bars, that is, the upper electrode head 803 and the lower electrode head 904 move according to the specific on-site work requirements, and both electrode heads descend to the welding point, and after completing the compaction, the welding is energized. After the stirrups of the lower grid and the U-shaped steel bars are welded, the lower welding head assembly 3 is powered off. If the width of the steel cage required in actual production is relatively large, several groups of lower welding head assemblies 3 can be set on the frame slide rail assembly 103, and multiple groups of lower welding head assemblies 3 can weld the upper stirrups and the U-shaped steel bars at the same time;

[0072] S7: Based on S5, after all upper welding head assemblies 2 are welded to the upper stirrups, the upper electrode head 803 and the lower electrode head 904 can be withdrawn from the same side of the welding point. The upper welding head assembly 2 releases the stirrups and U-shaped steel bars and moves to the origin position to wait.

[0073] S8: Based on S6, after all lower welding head assemblies 3 are welded to the lower stirrups, the upper electrode head 803 and the lower electrode head 904 can be withdrawn from the same side of the welding point. The lower welding head assembly 3 releases the stirrups and U-shaped steel bars and moves to the origin position to wait.

[0074] S9: After the welded stirrups are removed, repeat S1 to S8 until the steel cage welding is completed and all upper welding head assemblies 2 and lower welding head assemblies 3 return to their original positions.

[0075] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of rights of the present invention. Therefore, modifications, equivalent changes, improvements, etc. made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A fully automatic welding device for stirrups and U-shaped steel bars, comprising a frame (1), wherein the lower end of the frame (1) is buried in a building pit, and the portion of the frame (1) in contact with the ground is fixed to the ground via a fixing bracket (102), characterized in that: The machine frame (1) further comprises an upper welding head assembly (2) and a lower welding head assembly (3), wherein the upper and lower ends of the machine frame (1) are respectively fixed with a machine frame slide rail assembly (103), the upper welding head assembly (2) and the lower welding head assembly (3) are respectively slidably connected to the machine frame slide rail assembly (103), the upper welding head assembly (2) and the lower welding head assembly (3) are arranged relative to each other, the upper welding head assembly (2) comprises a fixed frame (401), a conductive assembly, a back plate (402), a right-angle guide plate (404), a Z-direction cylinder (6), an upper electrode assembly, a lower electrode assembly, an X-direction moving assembly and a Y-direction moving assembly, the fixed frame (40 1) A conductive component is fixedly installed on the upper portion, one side of the conductive component is movably connected to the right-angle guide plate (404), a Z-direction slide rail component (403) is provided on one side of the back plate (402), the back side of the right-angle guide plate (404) is slidably connected to the Z-direction slide rail component (403), the other side of the back plate (402) is fixedly connected to the fixed frame (401), an X-direction moving component is fixedly installed on the right-angle guide plate (404), a Y-direction moving component is fixedly installed on the upper end of the X-direction moving component, a mounting frame (5) is provided on the Y-direction moving component, a Z-direction cylinder (6) is fixedly installed on the upper end of the mounting frame (5), and the output shaft of the Z-direction cylinder (6) is movable The lower electrode assembly is rotatably connected to the lower electrode assembly, the lower electrode assembly is adapted to be mounted on the upper electrode assembly, and the upper electrode assembly is fixedly connected to the conductive assembly; the lower welding head assembly (3) comprises a pre-alignment assembly (33), a fixed frame (401), a conductive assembly, a back plate (402), a right-angle guide plate (404), a Z-direction cylinder (6), an upper electrode assembly, a lower electrode assembly, an X-direction moving assembly, and a Y-direction moving assembly, the fixed frame (401) is fixedly mounted with a conductive assembly, one side of the conductive assembly is movably connected to the right-angle guide plate (404), one side of the back plate (402) is provided with a Z-direction slide rail assembly (403), the right-angle guide plate (404) ) is slidably connected to the Z-direction slide rail assembly (403) on the back side, and the other side of the back plate (402) is fixedly connected to the fixed frame (401), and the right-angle guide plate (404) on the lower welding head assembly (3) is fixedly installed with the X-direction moving assembly and the pre-alignment assembly (33), and the upper end of the X-direction moving assembly is fixedly installed with the Y-direction moving assembly, and the Y-direction moving assembly is provided with a mounting frame (5), and the upper end of the mounting frame (5) is fixedly installed with the Z-direction cylinder (6), and the output shaft of the Z-direction cylinder (6) is rotatably connected to the lower electrode assembly through a movable part, and the lower electrode assembly is adapted to be installed on the upper electrode assembly, and the upper electrode assembly is fixedly connected to the conductive assembly.

2. The fully automatic welding equipment for stirrups and U-shaped steel bars according to claim 1, characterized in that: The pre-alignment assembly (33) comprises a pre-alignment plate (3301), an alignment cylinder (3302) and a mounting seat (3303); the mounting seat (3303) and the alignment cylinder (3302) are fixedly provided on the right-angle guide plate (404) on the lower welding head assembly (3); the output shaft of the alignment cylinder (3302) is fixedly connected to the pre-alignment plate (3301) via a clamping block; the pre-alignment plate (3301) is slidably inserted into the inner side of the mounting seat (3303), and a gap is left between the pre-alignment plate (3301) and the inner side of the mounting seat (3303).

3. The fully automatic welding equipment for stirrups and U-shaped steel bars according to claim 1, characterized in that: The lower electrode assembly comprises a lower electrode rod (901), a lower electrode rod (902), a protective sleeve (903) and a lower electrode head (904); the lower electrode rod (901) is connected to the movable part; the lower end of the lower electrode rod (901) is fixedly connected to the lower electrode rod (902); the lower electrode rod (902) is provided with a protective sleeve (903); the lower end of the lower electrode rod (902) is fixedly connected to the lower electrode head (904); the upper electrode assembly comprises an upper electrode rod (80 1), an insulating gasket (802) and an upper electrode head (803), the upper electrode rod (801) is adapted to be arranged on the outer periphery of the protective sleeve (903), an insulating gasket (802) is provided on the inner side of the upper end of the upper electrode rod (801), and the insulating gasket (802) is fitted with the upper end of the protective sleeve (903); the lower end of the upper electrode rod (801) is fixedly connected to the upper electrode head (803), and an insulating gasket (802) is attached between the upper electrode head (803) and the lower electrode rod (902).

4. The fully automatic welding equipment for stirrups and U-shaped steel bars according to claim 3, characterized in that: The invention comprises a transformer (10), a first hard copper bar (11), a first soft copper bar (12), a second hard copper bar (13), a second soft copper bar (14), a third soft copper bar (15), a fourth hard copper bar (16) and a fifth hard copper bar (17), wherein the transformer (10) is fixedly mounted on the fixing frame (401), an output end of the transformer (10) is fixedly connected to the first hard copper bar (11) arranged opposite to the first hard copper bar (11), one side of the first hard copper bar (11) is fixedly connected to one end of the first soft copper bar (12), and the other end of the first soft copper bar (12) is fixedly connected to the second hard copper bar (13). One side of the second hard copper bar (13) is slidably connected to the right-angle guide plate (404) through a slider assembly (30), the second hard copper bar (13) is fixedly connected to the second soft copper bar (14) and the third soft copper bar (15), one end of the second soft copper bar (14) is fixedly connected to the fourth hard copper bar (16), the lower end of the fourth hard copper bar (16) is fixedly connected to the upper electrode rod (801), one end of the third soft copper bar (15) is fixedly connected to the fifth hard copper bar (17), and one end of the fifth hard copper bar (17) is fixedly connected to the lower electrode rod (901).

5. The fully automatic welding equipment for stirrups and U-shaped steel bars according to claim 1, characterized in that: It also includes a screw assembly (18), the screw assembly (18) includes a screw nut and a screw, the screw nut is fixed to the bottom of the right-angle guide plate (404), the screw is fixed on the back plate (402), and the screw is arranged in parallel with the Z-direction slide rail assembly (403).

6. The fully automatic welding equipment for stirrups and U-shaped steel bars according to claim 4, characterized in that: The Y-direction moving assembly includes a Y-direction guide plate (22), a Y-direction cylinder (23), a Y-direction linear guide rail (24) and a Y-direction guide seat (25), wherein the Y-direction cylinder (23) and the Y-direction guide seat (25) are respectively fixed on the Y-direction guide plate (22), and the output end of the Y-direction cylinder (23) is transmission-connected with the Y-direction linear guide rail (24), and the Y-direction linear guide rail (24) is fixed on the bottom of the Y-direction guide plate (22); a through hole is opened on the Y-direction guide seat (25), and the lower electrode rod (901) passes through the through hole with a gap between the through hole and the Y-direction guide seat (25) is clamped on the outside of the upper electrode rod (801), and the upper end of the Y-direction guide seat (25) is fixedly connected to the fourth hard copper bar (16), and one end of the fourth hard copper bar (16) is fixed to the upper electrode rod (801).

7. The fully automatic welding equipment for stirrups and U-shaped steel bars according to claim 6, characterized in that: The X-direction moving assembly comprises an X-direction guide plate (19), an X-direction cylinder (20) and an X-direction linear guide rail (21), wherein the X-direction cylinder (20) is fixedly mounted on the right-angle guide plate (404) in parallel, and an output end of the X-direction cylinder (20) is transmission-connected to the X-direction linear guide rail (21), and a Y-direction guide plate (22) is fixedly mounted on the X-direction linear guide rail (21).

8. The fully automatic welding equipment for stirrups and U-shaped steel bars according to claim 3, characterized in that: The movable part comprises a fisheye joint (26) and a positioning pin (27), wherein the upper end of the fisheye joint (26) is fixedly connected to the output shaft of the Z-direction cylinder (6), and the lower end of the fisheye joint (26) is pin-connected to the upper end of the lower electrode rod (901) via the positioning pin (27).

9. The fully automatic welding equipment for stirrups and U-shaped steel bars according to claim 6, characterized in that: A fixing part is fixed on the upper part of the lower electrode rod (901), and the fixing part includes a fixing plate (28) and a linear bearing (29). One side of the fixing plate (28) is fixed to the outer side of the lower electrode rod (901) by bolts, and the other side of the fixing plate (28) is provided with a mounting hole, and a linear bearing (29) is fixed in the mounting hole. A guide rod (7) is movably sleeved in the linear bearing (29), and the bottom of the guide rod (7) is fixedly connected to the Y-direction guide plate (22).

10. A fully automatic welding method for stirrups and U-shaped steel bars, characterized in that: A fully automatic welding device for stirrups and U-shaped steel bars according to any one of claims 1 to 9, The following steps are involved: S1: The automatic welding equipment receives a positioning completion signal, and the upper welding head assembly (2) and the lower welding head assembly (3) are driven downward by the frame slide rail assembly (103) to move to the designated welding position. The upper electrode assembly and the lower electrode assembly of the upper welding head assembly (2) and the lower welding head assembly (3) are driven by the screw rod assembly to move as a whole to the pre-positioned position for controlling the position of the U-shaped steel bar. The lower welding head assembly (3) is used to weld the lower stirrups to the U-shaped steel bar. The upper welding head assembly (2) and the lower welding head assembly (3) can perform welding simultaneously or in turns according to the voltage conditions at the work site. S2: The alignment cylinder (3302) extends, driving the pre-alignment plate (3301) to rise, pushing the stirrup to the designated position; S3: The upper electrode assembly and the lower electrode assembly of the upper welding head assembly (2) and the lower welding head assembly (3) are moved as a whole to the welding preparation position under the drive of the screw assembly, and the alignment cylinder (3302) retracts, driving the pre-alignment plate (3301) to descend to the original position; S4: The upper welding head assembly (2) and the lower welding head assembly (3) drive the stirrups and U-shaped steel bars to move to the welding position, the upper welding head assembly (2) tightens the stirrups and U-shaped steel bars of the upper grid, and the lower welding head assembly (3) tightens the stirrups and U-shaped steel bars of the lower grid, and prepares for power welding; S5: Based on S4, the upper electrode head (803) and the lower electrode head (904) of the upper welding head assembly (2) are energized and turned on, generating a strong current to weld the steel bars, that is, the upper electrode head (803) and the lower electrode head (904) move according to the specific on-site work requirements, and both electrode heads move downward to the welding point, and after completing the compression, the welding is energized. After the stirrups of the upper grid and the U-shaped steel bars are welded, the upper welding head assembly (2) is powered off. If the width of the steel cage required in actual production is relatively large, several groups of upper welding head assemblies (2) can be set on the frame slide rail assembly (103), and the multiple groups of upper welding head assemblies (2) weld the upper stirrups and the U-shaped steel bars at the same time; S6: Based on S4, the upper electrode head (803) and the lower electrode head (904) of the lower welding head assembly (3) are energized and turned on, generating a strong current to weld the steel bars, that is, the upper electrode head (803) and the lower electrode head (904) move according to the specific on-site work requirements, and both electrode heads move downward to the welding point, and after completing the compression, the welding is energized. After the stirrups of the lower grid and the U-shaped steel bars are welded, the lower welding head assembly (3) is powered off. If the width of the steel cage required in actual production is relatively large, several groups of lower welding head assemblies (3) can be set on the frame slide rail assembly (103), and the multiple groups of lower welding head assemblies (3) weld the upper stirrups and the U-shaped steel bars at the same time; S7: Based on S5, after all upper welding head assemblies (2) and upper stirrups are welded, the upper electrode head (803) and the lower electrode head (904) can be withdrawn from the same side of the welding point, the upper welding head assembly (2) releases the stirrups and U-shaped steel bars, and moves to the origin position to wait; S8: Based on S6, after all lower welding head assemblies (3) and lower stirrups are welded, the upper electrode head (803) and the lower electrode head (904) can be withdrawn from the same side of the welding point, the lower welding head assembly (3) loosens the stirrups and U-shaped steel bars, and moves to the origin position to wait; S9: After the welded stirrups are removed, repeat S1 to S8 until the reinforcement cage is welded and all upper welding head assemblies (2) and lower welding head assemblies (3) return to their original positions.

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