Automatic opening and closing external electrode mechanism and roll welding equipment

Abstract

The utility model provides an outer electrode mechanism capable of automatically opening and closing and roll welding equipment, the outer electrode mechanism capable of automatically opening and closing comprises a fixed machine base, a rotatable rotary installation bottom plate and an opening and closing electrode assembly, and the inner circumferential side of the rotary installation bottom plate is provided with a rib penetrating area. The opening and closing electrode assembly comprises an opening and closing driving source installed on the fixed machine base, an extending arm installed on the rotary installation bottom plate, an opening and closing driving arm rotatably installed on the extending arm and an outer electrode installed on the opening and closing driving arm, and the opening and closing driving source can act on the opening and closing driving arm to drive the opening and closing driving arm to rotate relative to the extending arm; the outer electrode is close to or far away from the rib penetrating area, closing or opening of the outer electrode is correspondingly achieved, and therefore mutual interference between the upset head portion at the end of the PC steel bar and the outer electrode is avoided during rib penetrating before roll welding and when cage ribs are pulled out after roll welding. The opening and closing driving source is installed on the fixed machine base which is fixedly arranged, opening and closing of the outer electrode are easily achieved, the fault rate is reduced, and overall operation is more stable and efficient.

Description

Technical Field

[0001] The utility model relates to the field of prefabricated pile manufacturing, in particular to an automatically opening and closing external electrode mechanism and a roll welding device equipped with the automatically opening and closing external electrode mechanism. Background Art

[0002] In the tubular pile industry, cage reinforcement, the skeleton of prefabricated piles, is typically produced using a roll welding process. Typically, a roll welding machine consists of a rotating faceplate, a rotating feed tray, an intermediate electrode, an outer electrode, a reinforcement insertion mechanism, and a traction mechanism. The reinforcement insertion mechanism comprises several reinforcement insertion tubes. Before roll welding, several pre-headed precast concrete (PC) steel bars are inserted one by one through the reinforcement insertion tubes. The head of the PC bar passes through the outer electrode and is retained in the locking hole of the traction tray in the traction mechanism. During the roll welding process, the intermediate electrode presses against the PC bar, while the outer electrode presses against the spiral reinforcement released from the feed tray. Combined with the traction mechanism pulling the PC bars, the spiral reinforcement is rotationally welded to the outer circumference of the bars, ultimately producing the cage reinforcement. After roll welding, the traction mechanism removes the entire cage reinforcement. However, because both ends of the PC bar are headed before roll welding, the thickened head portions at each end can lead to the following problems during the roll welding process.

[0003] 1. During the reinforcing bar threading operation before seam welding, the upsetting head of some PC steel bars will be blocked by the round cake that constitutes the outer electrode when passing through the outer electrode, causing some PC steel bars to be unable to pass smoothly through the lock hole position of the traction disk. At this time, it is necessary to manually pry off the outer electrode round cake so that the blocked PC steel bars can pass through the lock hole position of the traction disk.

[0004] 2. When the traction mechanism pulls out the entire cage reinforcement after seam welding, the upsetting head of some PC steel bars can easily get caught on the outer electrode disc, causing deformation of the outer electrode disc or an overload alarm on the traction mechanism's motor.

[0005] To avoid these issues, some seam welders are equipped with an automatic cage reinforcement opening and closing mechanism. This mechanism, which uses a servo motor and lead screw to automatically open and close each PC steel bar, avoids interference between the PC bar's head and the outer electrode disc during reinforcement insertion and when the cage reinforcement is pulled out after seam welding. However, the servo motor and drive components of this automatic cage reinforcement opening and closing mechanism must be mounted on the high-speed rotating faceplate of the seam welder. Furthermore, the addition of charging and signal transmission functions complicates the overall structure and increases the risk of failure. Utility Model Content

[0006] In view of the shortcomings of the prior art described above, the technical problem to be solved by the present invention is to provide an external electrode mechanism that automatically opens and closes, simplifies the structure, and avoids interference between the upsetting head of the PC steel rod and the external electrode when threading and pulling the reinforcement.

[0007] To achieve the above-mentioned purpose, the utility model provides an automatically opening and closing external electrode mechanism, comprising a fixed machine base, a rotating mounting base plate rotatably mounted on the fixed machine base, and an opening and closing electrode assembly, wherein the inner circumference of the rotating mounting base plate has a ribbed area, and the opening and closing electrode assembly comprises an opening and closing drive source mounted on the fixed machine base, an extension arm mounted on the rotating mounting base plate, an opening and closing drive arm rotatably mounted on the extension arm, and an external electrode mounted on the opening and closing drive arm, wherein the opening and closing drive source can act on the opening and closing drive arm to drive the opening and closing drive arm to rotate relative to the extension arm, so that the external electrode approaches or moves away from the ribbed area.

[0008] The preferred solution of the above technical solution is: the opening and closing electrode assembly also includes a driving push rod connected to the opening and closing driving source, an opening and closing lever rotatably mounted on the rotating mounting base plate, and an opening and closing connecting rod, the two ends of the opening and closing connecting rod are respectively rotatably connected to the opening and closing lever and the opening and closing driving arm, the opening and closing driving source drives the driving push rod to move toward or away from the opening and closing lever, and drives the driving push rod to contact or separate from the opening and closing lever.

[0009] A preferred embodiment of the above technical solution is as follows: the opening and closing electrode assembly further comprises a positioning stop shaft fixed to the rotatable mounting base plate, a positioning link having one end rotatably connected to the opening and closing drive arm, a first spring sleeved on the positioning link, and a first connecting joint fixed to the extension arm;

[0010] Along the rotation direction of the opening and closing driving arm when the outer electrode moves close to the rib-piercing area, the positioning stop shaft is distributed on this side of the opening and closing driving arm and can abut against the opening and closing driving arm;

[0011] Along the rotation direction of the opening and closing driving arm when the outer electrode moves away from the rib-piercing area, the positioning link, the first spring and the first connecting joint are all distributed on this side of the opening and closing driving arm, and the other end of the positioning link is movably inserted into the first connecting joint. A first spring top block is installed on the positioning link, and the two ends of the first spring are respectively in contact with the first spring top block and the first connecting joint.

[0012] The preferred solution of the above technical solution is: the opening and closing drive source is a cylinder, the end of the cylinder piston rod of the opening and closing drive source is fixed with a drive connecting plate, and the end of the drive push rod facing away from the opening and closing lever is fixed to the drive connecting plate.

[0013] The preferred solution of the above technical solution is: the automatically opening and closing external electrode mechanism also includes an adjusting component, which includes an adjusting seat fixed to a rotating mounting base, a first adjusting slider and a second adjusting slider both movably mounted on the adjusting seat, a first adjusting unit connected to the first adjusting slider, a second adjusting unit connected to the second adjusting slider, an adjusting connecting plate, a second connecting joint fixed to the adjusting connecting plate, an adjusting link, and a second spring sleeved on the adjusting link, the extension arm is rotatably mounted on the first adjusting slider, the adjusting connecting plate is fixed to the second adjusting slider, one end of the adjusting link is rotatably connected to the extension arm, and a second spring top block is installed at the end, and the other end of the adjusting link is movably passed through the second connecting joint, and the two ends of the second spring respectively abut against the second spring top block and the second connecting joint.

[0014] The preferred solution of the above technical solution is: the first adjusting unit includes a first screw rod rotatably supported in the adjusting seat, and a first adjusting block and a first fixed locking ring respectively fixed at both ends of the first screw rod, and the first screw rod is threadedly engaged with the first adjusting slider; the second adjusting unit includes a second screw rod rotatably supported in the adjusting seat, and a second adjusting block and a second fixed locking ring respectively fixed at both ends of the second screw rod, and the second screw rod is threadedly engaged with the second adjusting slider.

[0015] The preferred solution of the above technical solution is: the first screw rod and the second screw rod are parallel, the adjustment assembly also includes a first linear guide rail assembly, the first linear guide rail assembly is connected between the first adjustment slider and the adjustment seat, and the second adjustment slider and the adjustment seat, the first screw rod and the second screw rod are distributed on both sides of the first linear guide rail assembly, the first screw rod is passed through the second adjustment slider, and the two are slidably matched, the second screw rod is passed through the first adjustment slider, and the two are slidably matched.

[0016] The preferred solution of the above technical solution is: a first positioning sensor and a second positioning sensor are installed on the rotating mounting base, and the first positioning sensor and the second positioning sensor are spaced apart along the rotation direction of the rotating mounting base; a detection block is fixed on the fixed machine base, and the detection block can trigger the first positioning sensor and the second positioning sensor.

[0017] The preferred solution of the above technical solution is: the automatically opening and closing external electrode mechanism also includes a positioning assembly, the positioning assembly includes a positioning block fixed to the rotating mounting base, a positioning drive source fixed to the fixed machine base, and a positioning rod transmission-connected to the positioning drive source, a positioning groove that can accommodate the positioning rod is provided in the positioning block, and the positioning drive source drives the positioning rod to approach or move away from the positioning groove.

[0018] The utility model also provides a seam welding device, wherein the seam welding device is provided with the automatically opening and closing outer electrode mechanism as described above.

[0019] As described above, the automatic opening and closing outer electrode mechanism and seam welding equipment of the present invention have the following beneficial effects:

[0020] In the present application, the opening and closing drive arm on which the external electrode is mounted is rotatable relative to the extension arm. When the opening and closing drive source drives the opening and closing drive arm to rotate, the external electrode can be moved closer to or further away from the reinforcement insertion area, thereby correspondingly achieving the closing or opening of the external electrode. In this way, when the reinforcement is inserted before roll welding, and when the cage reinforcement is pulled out after roll welding, the action of the opening and closing drive source moves the external electrode away from the reinforcement insertion area, thereby avoiding interference between the upsetting head at the end of the PC steel bar and the external electrode. During the roll welding process, the opening and closing drive source does not operate, causing the external electrode to approach the reinforcement insertion area, thereby causing the external electrode to press against the spiral reinforcement, ensuring the smooth progress of the roll welding operation. In particular, the present application installs the opening and closing drive source on a fixed machine base, simplifying the overall structure for achieving the opening and closing of the external electrode, easily achieving the opening and closing of the external electrode, reducing the failure rate, and making the overall operation more stable and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the automatically opening and closing outer electrode mechanism of this application.

[0022] Figure 2 for Figure 1 main view.

[0023] Figure 3 for Figure 2 Schematic diagram of the structure after omitting the fixed machine base, rotating mounting base plate, intermediate electrode and positioning assembly.

[0024] Figure 4 for Figure 1 Schematic diagram of the structure of the positioning component from another perspective.

[0025] Figure 5 for Figure 4 main view.

[0026] Component number description

[0027] 10 Fixed base

[0028] 20 Rotating mounting base

[0029] 30 Reinforcement area

[0030] 41 Opening and closing drive source

[0031] 42 Extend your arms

[0032] 43 Opening and closing drive arm

[0033] 44 External electrode

[0034] 45 drive push rod

[0035] 46 Opening and closing lever

[0036] 47 Opening and closing connecting rod

[0037] 48 Positioning shaft

[0038] 49 Positioning link

[0039] 410 First Spring

[0040] 411 First Joint

[0041] 412 first spring top block

[0042] 413 cylinder fixing plate

[0043] 414 Second linear guide assembly

[0044] 415 drive connecting plate

[0045] 51 Adjustment seat

[0046] 52 First adjustment slider

[0047] 53 Second adjustment slider

[0048] 54 Adjusting connecting plate

[0049] 55 Second joint

[0050] 56 Adjusting connecting rod

[0051] 57 Second Spring

[0052] 58 Second spring top block

[0053] 59 First screw

[0054] 510 First adjustment block

[0055] 511 First fixed lock ring

[0056] 512 Second screw

[0057] 513 Second adjustment block

[0058] 514 Second fixed lock ring

[0059] 515 first linear guide assembly

[0060] 516 Rotation Axis

[0061] 61 positioning block

[0062] 62 Positioning drive source

[0063] 63 Positioning rod

[0064] 64 positioning slots

[0065] 70 intermediate electrode DETAILED DESCRIPTION

[0066] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0067] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification for the understanding and reading of those familiar with this technology, and are not used to limit the conditions for the implementation of this utility model. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in this utility model without affecting the efficacy and purpose of the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be considered as the scope of the implementation of this utility model without substantially changing the technical content.

[0068] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element through an intervening element.

[0069] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0070] The utility model provides an automatically opening and closing outer electrode mechanism and a seam welding device equipped with the automatically opening and closing outer electrode mechanism. Figure 1 and Figure 2As shown, the seam welding equipment includes a fixed base 10, a rotating mounting base 20 rotatably mounted on the fixed base 10, a rib threading mechanism mounted on the fixed base 10, an intermediate electrode 70 mounted on the fixed base 10, and a rotatable material tray for winding spiral ribs. The rotating mounting base 20, also known as a faceplate, is driven to rotate by a motor. The inner circumference of the rotating mounting base 20 has a rib threading area 30. The rib threading mechanism is located within the rib threading area 30 and includes several rib threading tubes. The arrangement of the rib threading tubes matches the type of cage ribs, for example, the tubes are arranged in a circular ring or a square ring. The intermediate electrode 70 is arranged at the center of the fixed base 10.

[0071] like Figures 1 to 3 As shown, the automatic opening and closing external electrode mechanism involved in the present invention includes, in addition to the above-mentioned fixed machine base 10 and the rotating mounting base 20, an opening and closing electrode assembly. The opening and closing electrode assembly includes an opening and closing drive source 41 mounted on the fixed machine base 10, an extension arm 42 mounted on the rotating mounting base 20, an opening and closing drive arm 43 rotatably mounted on the extension arm 42, and an external electrode 44 mounted at one end of the opening and closing drive arm 43 away from the extension arm 42. The external electrode 44 is a circular structure. The rotation connection point between the opening and closing drive arm 43 and the extension arm 42 constitutes a rotation fulcrum of the opening and closing drive arm 43 on the extension arm 42. The opening and closing drive source 41 can act on the opening and closing drive arm 43 to drive the opening and closing drive arm 43 with the external electrode 44 mounted on the end thereof to rotate relative to the extension arm 42, thereby causing the external electrode 44 to approach or move away from the rib-piercing area 30, thereby achieving the closing or opening of the external electrode 44 accordingly.

[0072] When inserting the reinforcement before roll welding, the opening and closing drive source 41 is activated, so that the outer electrode 44 is away from the reinforcement insertion area 30, and the outer electrode 44 is in an open state; several PC steel bars with upswept ends are inserted into the reinforcement insertion tube one by one. Since the outer electrode 44 is away from the reinforcement insertion area 30, the upswept ends of the PC steel bars will not be blocked by the outer electrode 44 when passing through the outer electrode 44, so that the several PC steel bars can smoothly pass through the outer electrode 44 and be inserted into the lock hole position of the traction disk, avoiding the outer electrode 44 from blocking the PC steel bars during the reinforcement insertion process. After the reinforcement is inserted and roll welding is performed, the opening and closing drive source 41 is reset, so that the outer electrode 44 is close to the reinforcement insertion area 30, and the outer electrode 44 is in a pressed state. The outer electrode 44 presses against the spiral reinforcement released from the material tray. Combined with the pressing cooperation between the intermediate electrode 70 and the several PC steel bars, the spiral reinforcement is smoothly rotationally welded to the outer periphery of the several PC steel bars, completing the roll welding production of the cage reinforcement. After the roll welding is completed, the opening and closing drive source 41 is activated again, so that the outer electrode 44 is away from the reinforcement area 30 again, and the outer electrode 44 is in the open state again; thereafter, when the traction mechanism pulls out the cage reinforcement, since the outer electrode 44 is away from the reinforcement area 30, the upsetting head of the PC steel bar will not get caught on the outer electrode 44 when passing through the outer electrode 44, thereby avoiding deformation of the outer electrode 44 or overload alarm of the motor of the traction mechanism.

[0073] Therefore, in the automatic opening and closing external electrode mechanism involved in this application, when inserting the reinforcement before roll welding, and when pulling out the cage reinforcement after roll welding, the action of the opening and closing drive source 41 causes the external electrode 44 to automatically open, away from the reinforcement insertion area 30, to avoid interference between the upsetting head at the end of the PC steel bar and the external electrode 44; during the roll welding operation, the external electrode 44 is automatically pressed together, close to the reinforcement insertion area 30, pressing against the spiral reinforcement, completing the roll welding operation. In particular, this application installs the opening and closing drive source 41 on a fixed fixed machine base 10, simplifying the overall structure of the external electrode 44 opening and closing, easily achieving the opening and closing of the external electrode 44, reducing the failure rate, and making the overall operation more stable and efficient.

[0074] Furthermore, a portion of the connection structure between the opening and closing driving source 41 and the opening and closing driving arm 43 is mounted on the rotating mounting base 20, and a portion is mounted on the fixed base. Figure 2 and Figure 3 As shown, the opening and closing electrode assembly also includes a driving rod 45 connected to the opening and closing drive source 41, an opening and closing lever 46 rotatably mounted on the rotating mounting base 20, and an opening and closing connecting rod 47. The rotational connection point between the opening and closing lever 46 and the rotating mounting base 20 constitutes the rotation fulcrum of the opening and closing lever 46 on the rotating mounting base 20. The two ends of the opening and closing connecting rod 47 are respectively rotatably connected to the opening and closing lever 46 and the opening and closing drive arm 43. The opening and closing drive source 41 drives the driving rod 45 to move toward or away from the opening and closing lever 46, driving the driving rod 45 to contact or separate from the opening and closing lever 46. During the roll welding process, the outer electrode 44 is in a pressed state near the rib-piercing area 30. At this time, the opening and closing drive source 41 is in an initial state without action. At this time, the driving rod 45 is away from the opening and closing lever 46, and the two are separated. When threading the reinforcement before roll welding and pulling out the cage reinforcement after roll welding, the outer electrode 44 needs to be driven to open. At this time, the opening and closing driving source 41 is activated to drive the driving push rod 45 to move toward the opening and closing lever 46. After the driving push rod 45 contacts the opening and closing lever 46, the opening and closing lever 46 is driven to rotate around its rotation fulcrum, and the opening and closing driving arm 43 is driven to rotate around its rotation fulcrum through the opening and closing connecting rod 47, so that the outer electrode 44 is away from the reinforcement threading area 30.

[0075] Preferably, if Figure 2 and Figure 3As shown, the opening and closing drive source 41 and the drive push rod 45 are located at the lower corner of the outer peripheral area of ​​the rotatable mounting base 20. The opening and closing drive source 41 is a pneumatic cylinder. The end of the cylinder piston rod of the opening and closing drive source 41 is fixed to a drive connecting plate 415. The end of the drive push rod 45 facing away from the opening and closing lever 46 is fixed to the drive connecting plate 415, so that the drive push rod 45 moves in a translational manner. Simultaneously, the opening and closing drive source 41 is fixed to a cylinder fixing plate 413 via several screws, and the cylinder fixing plate 413 is fixed to the fixed machine base 10 via several screws, thereby securing the opening and closing drive source 41 to the fixed machine base 10. Furthermore, a second linear guide assembly 414 is connected between the drive connecting plate 415 and the cylinder fixing plate 413 to ensure the stability of the translation of the drive connecting plate 415 and the drive push rod 45. Of course, in other embodiments, the opening and closing drive source 41 can also be a motor.

[0076] Furthermore, when the opening and closing driving source 41 drives the outer electrode 44 to open, the rotating mounting base plate 20 needs to be positioned at a set position, that is, Figure 2 The position shown. Based on this, a first positioning sensor and a second positioning sensor are installed on the rotating mounting base plate 20, and the first positioning sensor and the second positioning sensor are distributed at 180° intervals along the rotation direction of the rotating mounting base plate 20; a detection block is fixed on the fixed machine base 10, and the detection block can trigger the first positioning sensor and the second positioning sensor. When it is necessary to drive the outer electrode 44 to open, the motor driving the rotating mounting base plate 20 to rotate is controlled to start deceleration according to the signal of the first positioning sensor; thereafter, the motor driving the rotating mounting base plate 20 to rotate is controlled to stop according to the signal of the second positioning sensor, so that the rotating mounting base plate 20 stops rotating. At this time, the opening and closing lever 46 installed on the rotating mounting base plate 20 is just opposite to the driving push rod 45 installed on the fixed machine base 10, ensuring that after the cylinder piston rod of the subsequent opening and closing drive source 41 is extended, the outer electrode 44 can be accurately driven to open. The first positioning sensor and the second positioning sensor are preferably both photoelectric sensors.

[0077] Furthermore, in order to improve the accuracy of positioning the rotation mounting base plate 20 at the set position, as shown in FIG. Figure 2 、 Figure 4 and Figure 5As shown, the automatic opening and closing outer electrode mechanism also includes a positioning assembly; the positioning assembly includes a positioning block 61 fixed to the rotating mounting base 20, a positioning drive source 62 fixed to the fixed machine base 10, and a positioning rod 63 in transmission connection with the positioning drive source 62. The positioning drive source 62 and the positioning rod 63 are arranged closely above the opening and closing drive source 41. A positioning groove 64 capable of accommodating the positioning rod 63 is provided in the positioning block 61. The positioning drive source 62 drives the positioning rod 63 toward or away from the positioning groove 64. Preferably, the positioning groove 64 is a V-shaped groove with an opening toward the positioning rod 63, and the positioning drive source 62 is a cylinder. When the opening and closing drive source 41 is in the initial state, the positioning drive source 62 is also in the initial state of non-action. At this time, the positioning rod 63 is away from the positioning groove 64 and does not contact the positioning block 61. Before the opening and closing drive source 41 is activated, the rotatable mounting base plate 20 stops rotating according to the signals from the first and second positioning sensors. The positioning drive source 62 then activates, extending its cylinder piston rod, thereby driving the positioning rod 63 toward the positioning block 61 until the outer end of the positioning rod 63 enters the positioning slot 64, more reliably and accurately positioning the rotatable mounting base plate 20 at the set position. The opening and closing drive source 41 then activates, accurately opening the outer electrode 44 through the rotation of the opening and closing lever 46 and the opening and closing drive arm 43.

[0078] Further, if Figure 2 and Figure 3 As shown, the automatically opening and closing electrode assembly further includes a positioning stop shaft 48 fixed to the rotating mounting base plate 20, a positioning link 49 with one end rotatably connected to the opening and closing drive arm 43, a first spring 410 sleeved on the positioning link 49, and a first connection joint 411 fixed to the extension arm 42. When the outer electrode 44 moves close to the rib-piercing area 30, the rotation direction of the opening and closing drive arm 43, i.e. Figure 3 In the counterclockwise direction of the drawing, the positioning stop shaft 48 is distributed on the counterclockwise side of the opening and closing driving arm 43 and can abut against the opening and closing driving arm 43. When the outer electrode 44 moves away from the rib-piercing area 30, the rotation direction of the opening and closing driving arm 43, that is, Figure 3 In the clockwise direction of the view, the positioning link 49, the first spring 410, and the first connecting joint 411 are all distributed on the clockwise side of the opening and closing drive arm 43. The other end of the positioning link 49 is movably inserted into the first connecting joint 411. A first spring top block 412 is installed on the positioning link 49. The two ends of the first spring 410 respectively abut against the first spring top block 412 and the first connecting joint 411. The first spring top block 412 can be a nut. When the opening and closing drive source 41 is activated and drives the outer electrode 44 to open, the first spring 410 is further compressed, limiting the clockwise swing amplitude of the opening and closing drive arm 43. After the opening and closing drive source 41 is reset, the first spring 410 drives the opening and closing drive arm 43 to swing counterclockwise to reset. The positioning stop shaft 48 abuts against the opening and closing drive arm 43 to limit the counterclockwise swing amplitude of the opening and closing drive arm 43.

[0079] Further, if Figures 1 to 3 As shown, the automatic opening and closing external electrode mechanism also includes an adjustment component, which includes an adjustment seat 51 fixed to the rotating mounting base 20, a first adjustment slider 52 and a second adjustment slider 53 both movably mounted on the adjustment seat 51, a first adjustment unit connected to the first adjustment slider 52, a second adjustment unit connected to the second adjustment slider 53, an adjustment connecting plate 54, a second connecting joint 55 fixed to the adjustment connecting plate 54, an adjustment link 56, and a second spring 57 sleeved on the adjustment link 56, the extension arm 42 is rotatably mounted on the first adjustment slider 52 through a rotating shaft 516, the adjustment connecting plate 54 is fixed to the second adjustment slider 53, one end of the adjustment link 56 is rotatably connected to the extension arm 42, and a second spring top block 58 is installed at the end, the other end of the adjustment link 56 is movably passed through the second connecting joint 55, the two ends of the second spring 57 are respectively abutted against the second spring top block 58 and the second connecting joint 55, and a nut can be used for the second spring top block 58. By adjusting the position of the pivot point of the cantilever arm 42 and the spring force of the second spring 57 on the cantilever arm 42 through the first and second adjustment units, the position of the outer electrode 44 is ultimately adjusted, making the present invention suitable for a variety of cage reinforcements of different specifications and models, such as cage reinforcements with diameters of 400 to 1000 mm. Furthermore, the present invention balances the weight and centrifugal force on both sides of the rotating shaft 516 of the cantilever arm 42 to achieve a balanced position. This ensures that the elastic pressure of the outer electrode 44 on the spiral reinforcement is essentially the same at every angle during the roll welding process, ensuring consistent welding performance and improving the quality of the cage reinforcement.

[0080] Preferably, the spring force of the first spring 410 is much smaller than the spring force of the second spring 57. When the outer electrode 44 swings slightly radially relative to the middle electrode 70, the extension arm 42 will not be triggered to rotate about the rotation axis 516 until it exceeds the limited angle of the opening and closing drive arm 43. For square piles, the PC steel bars are arranged in a square shape. During the roll welding process, the outer electrode 44 experiences significant movement relative to the middle electrode 70. Because the spring force of the first spring 410 is relatively small and the rotation is flexible, the spring pressure variation of the second spring 57 at various angles during roll welding of the square pile cage reinforcement is reduced, and the impact when jumping on the square pile corner is also reduced, which can increase the production speed and improve the quality of the cage reinforcement roll welding.

[0081] Preferably, if Figure 3As shown, the first adjustment unit includes a first screw rod 59 rotatably supported in the adjustment seat 51, and a first adjustment block 510 and a first fixed locking ring 511 respectively fixed at both ends of the first screw rod 59. The first screw rod 59 is threadedly engaged with the first adjustment slider 52. The first screw rod 59 is rotated by the first adjustment block 510 or the first fixed locking ring 511 to adjust the position of the first adjustment slider 52. The second adjustment unit includes a second screw rod 512 rotatably supported in the adjustment seat 51, and a second adjustment block 513 and a second fixed locking ring 514 respectively fixed at both ends of the second screw rod 512. The second screw rod 512 is threadedly engaged with the second adjustment slider 53. The second screw rod 512 is rotated by the second adjustment block 513 or the second fixed locking ring 514 to adjust the position of the second adjustment slider 53. Both the first adjustment block 510 and the second adjustment block 513 have an external hexagonal surface and an internal hexagonal groove, which facilitates the use of an internal or external hexagonal wrench.

[0082] Further, if Figure 3 As shown, the first screw rod 59 and the second screw rod 512 are parallel, and the adjustment assembly also includes a first linear guide rail assembly 515, which is connected between the first adjustment slider 52 and the adjustment seat 51, and the second adjustment slider 53 and the adjustment seat 51. The first screw rod 59 and the second screw rod 512 are distributed on both sides of the first linear guide rail assembly 515, and the first screw rod 59 is inserted into the second adjustment slider 53, and the two are slidably matched. The second screw rod 512 is inserted into the first adjustment slider 52, and the two are slidably matched, which effectively improves the accuracy of position adjustment of the first adjustment slider 52 and the second adjustment slider 53.

[0083] In summary, the working principle of the automatic opening and closing external electrode mechanism with the above structure is as follows:

[0084] 1. When threading the reinforcement before seam welding, and when pulling out the cage reinforcement after seam welding, the signals of the first and second positioning sensors are first used to stop the rotating mounting base plate 20 at the set position. Afterwards, the cylinder piston rod of the positioning drive source 62 extends, driving the outer end of the positioning rod 63 to extend into the positioning groove 64. Afterwards, the cylinder piston rod of the opening and closing drive source 41 extends, driving the push rod 45 to translate toward the opening and closing lever 46. The opening and closing lever 46 and the opening and closing connecting rod 47 drive the opening and closing drive arm 43 to rotate clockwise, so that the outer electrode 44 is away from the reinforcement threading area 30 and is in an open state, avoiding interference between the upsetting head at the end of the PC steel bar and the outer electrode 44.

[0085] 2. During roll welding, the opening and closing drive source 41 is reset. Under the action of the first spring 410, the opening and closing drive arm 43 and the outer electrode 44 are reset, and the outer electrode 44 is automatically pressed together. The positioning drive source 62 is also reset, and the positioning rod 63 leaves the positioning groove 64. Then, roll welding can be performed normally.

[0086] The present application realizes the automatic opening and closing of the outer electrode 44, reduces the labor intensity of manual prying each time, is simple and safe, operates more stably and efficiently, effectively improves the efficiency of seam welding, and saves energy and consumption.

[0087] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0088] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. An automatic opening and closing outer electrode mechanism, comprising a fixed machine base (10) and a rotating mounting base (20) rotatably mounted on the fixed machine base (10), wherein the inner circumference of the rotating mounting base (20) has a rib-piercing area (30), characterized in that: The invention also includes an opening and closing electrode assembly, wherein the opening and closing electrode assembly includes an opening and closing driving source (41) installed on a fixed machine base (10), an extension arm (42) installed on a rotating mounting base plate (20), an opening and closing driving arm (43) rotatably installed on the extension arm (42), and an external electrode (44) installed on the opening and closing driving arm (43). The opening and closing driving source (41) can act on the opening and closing driving arm (43) to drive the opening and closing driving arm (43) to rotate relative to the extension arm (42), so that the external electrode (44) is close to or away from the rib-piercing area (30).

2. The automatic opening and closing outer electrode mechanism according to claim 1, characterized in that: The opening and closing electrode assembly further comprises a driving push rod (45) connected to an opening and closing driving source (41), an opening and closing lever (46) rotatably mounted on a rotating mounting base plate (20), and an opening and closing connecting rod (47). The two ends of the opening and closing connecting rod (47) are rotatably connected to the opening and closing lever (46) and the opening and closing driving arm (43), respectively. The opening and closing driving source (41) drives the driving push rod (45) to move toward or away from the opening and closing lever (46), thereby driving the driving push rod (45) to contact or separate from the opening and closing lever (46).

3. The automatic opening and closing outer electrode mechanism according to claim 1 or 2, characterized in that: The opening and closing electrode assembly further comprises a positioning shaft (48) fixed to the rotationally mounted base plate (20), a positioning link (49) having one end rotatably connected to the opening and closing drive arm (43), a first spring (410) sleeved on the positioning link (49), and a first connecting joint (411) fixed to the extension arm (42); When the outer electrode (44) moves close to the rib-piercing area (30), along the rotation direction of the opening and closing driving arm (43), the positioning stop shaft (48) is distributed on this side of the opening and closing driving arm (43) and can abut against the opening and closing driving arm (43); Along the rotation direction of the opening and closing driving arm (43) when the outer electrode (44) moves away from the rib-piercing area (30), the positioning link (49), the first spring (410) and the first connecting joint (411) are all distributed on this side of the opening and closing driving arm (43), and the other end of the positioning link (49) is movably inserted into the first connecting joint (411). A first spring top block (412) is installed on the positioning link (49), and the two ends of the first spring (410) are respectively in contact with the first spring top block (412) and the first connecting joint (411).

4. The automatic opening and closing outer electrode mechanism according to claim 2, characterized in that: The opening and closing driving source (41) is a cylinder, the end of the cylinder piston rod of the opening and closing driving source (41) is fixed with a driving connecting plate (415), and one end of the driving push rod (45) facing away from the opening and closing lever (46) is fixed to the driving connecting plate (415).

5. The automatic opening and closing outer electrode mechanism according to claim 1, characterized in that: The invention also includes an adjustment assembly, wherein the adjustment assembly includes an adjustment seat (51) fixed to the rotation mounting base plate (20), a first adjustment slider (52) and a second adjustment slider (53) both movably mounted on the adjustment seat (51), a first adjustment unit connected to the first adjustment slider (52), a second adjustment unit connected to the second adjustment slider (53), an adjustment connecting plate (54), a second connection joint (55) fixed to the adjustment connecting plate (54), an adjustment connecting rod (56), and a sleeve mounted on the adjustment connecting rod (56). The second spring (57) is provided. The extension arm (42) is rotatably mounted on the first adjustment slider (52). The adjustment connecting plate (54) is fixed to the second adjustment slider (53). One end of the adjustment connecting rod (56) is rotatably connected to the extension arm (42) and is provided with a second spring top block (58). The other end of the adjustment connecting rod (56) is movably inserted into the second connection joint (55). The two ends of the second spring (57) are respectively in contact with the second spring top block (58) and the second connection joint (55).

6. The automatic opening and closing outer electrode mechanism according to claim 5, characterized in that: The first adjusting unit comprises a first screw rod (59) rotatably supported in the adjusting seat (51), and a first adjusting block (510) and a first fixed locking ring (511) respectively fixed at both ends of the first screw rod (59), and the first screw rod (59) is threadedly engaged with the first adjusting slider (52); the second adjusting unit comprises a second screw rod (512) rotatably supported in the adjusting seat (51), and a second adjusting block (513) and a second fixed locking ring (514) respectively fixed at both ends of the second screw rod (512), and the second screw rod (512) is threadedly engaged with the second adjusting slider (53).

7. The automatic opening and closing outer electrode mechanism according to claim 6, characterized in that: The first screw rod (59) and the second screw rod (512) are parallel to each other. The adjustment assembly further comprises a first linear guide rail assembly (515). The first linear guide rail assembly (515) is connected between the first adjustment slider (52) and the adjustment seat (51), and between the second adjustment slider (53) and the adjustment seat (51). The first screw rod (59) and the second screw rod (512) are distributed on both sides of the first linear guide rail assembly (515). The first screw rod (59) is inserted into the second adjustment slider (53), and the two are slidably matched. The second screw rod (512) is inserted into the first adjustment slider (52), and the two are slidably matched.

8. The automatic opening and closing outer electrode mechanism according to claim 1, characterized in that: A first positioning sensor and a second positioning sensor are installed on the rotating mounting base (20), and the first positioning sensor and the second positioning sensor are spaced apart along the rotation direction of the rotating mounting base (20); a detection block is fixed on the fixed machine base (10), and the detection block can trigger the first positioning sensor and the second positioning sensor.

9. The automatic opening and closing outer electrode mechanism according to claim 1, characterized in that: The invention also includes a positioning assembly, which includes a positioning block (61) fixed to the rotating mounting base (20), a positioning drive source (62) fixed to the fixed machine base (10), and a positioning rod (63) transmission-connected to the positioning drive source (62); a positioning groove (64) capable of accommodating the positioning rod (63) is provided in the positioning block (61); and the positioning drive source (62) drives the positioning rod (63) to approach or move away from the positioning groove (64).

10. A seam welding device, characterized in that: The seam welding equipment is equipped with the automatically opening and closing external electrode mechanism according to any one of claims 1 to 9.

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