Surrounding pressing mechanism for annular steel bar bending and welding platform

Abstract

The surrounding pressing mechanism comprises an annular extrusion wheel, a sliding plate and an annular sliding rail, the annular extrusion wheel is rotationally connected to a rotating shaft, the rotating shaft is fixedly connected to the L-shaped sliding plate, the sliding plate penetrates through an annular through groove formed in a supporting table and then is fixedly connected to a sliding block, and the annular sliding rail is fixedly connected to the annular extrusion wheel. An annular sliding rail used in cooperation with the sliding block is fixedly connected to the bottom of the supporting table and keeps consistent with the annular inner positioning nail in shape and parallel to the annular inner positioning nail internally and externally, the sliding plate is connected with a driving motor, the driving motor is fixedly connected with a driving gear, and an annular rack meshed with the driving gear is fixedly connected to the bottom of the supporting table and located on the inner side of the annular sliding rail. According to the steel bar bending machine, the sliding plate is driven to walk around the annular sliding rail, then the annular extrusion wheel is driven to conduct annular extrusion, extrusion is stable and reliable, extrusion is rapid and stable, the annular extrusion wheel rotates automatically, friction force is reduced, the possibility that steel bars are damaged is reduced, time and labor are saved, operation safety is improved, and bending quality is better.

Description

Technical Field

[0001] This utility model belongs to the technical field of rebar bending equipment, and relates to a circumferential pressing mechanism for a ring rebar bending and welding platform. Background Technology

[0002] Railway and highway construction requires a large number of steel cages, which are made of ring-shaped steel bars. The ring-shaped steel bars are made by bending steel bars of a certain length to form the desired ring structure. The most common ring structures are circular rings and flat rings. If welding fixtures are used for ring bending, it is still difficult to ensure the bending quality by bending manually. Moreover, the welding process is inefficient, time-consuming and labor-intensive. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a circumferential pressing mechanism for a ring-shaped steel bar bending and welding platform, which can ensure the bending quality of the steel bar, improve the welding efficiency, and save time and effort in bending.

[0004] The technical solution adopted by this utility model is as follows: a surrounding pressing mechanism for a ring-shaped steel bar bending and welding platform, comprising a ring-shaped pressing wheel, a sliding plate and a ring-shaped slide rail. The ring-shaped pressing wheel is rotatably connected to a rotating shaft, the rotating shaft is fixedly connected to an L-shaped sliding plate, the sliding plate passes through a ring-shaped through groove provided on the support platform and is fixedly connected to a slider, the ring-shaped slide rail used in conjunction with the slider is fixedly connected to the bottom of the support platform and is consistent with the shape of the inner positioning pin of the ring and parallel inside and outside, the sliding plate is connected to a drive motor, the drive motor is fixedly connected to a drive gear, and the ring-shaped rack meshing with the drive gear is fixedly connected to the bottom of the support platform and located inside the ring-shaped slide rail.

[0005] Furthermore, the aforementioned sliding plate is equipped with an upward-facing dust collection hood, which is fixedly connected to the lower end of the sliding plate and connected to a negative pressure dust collection device through a negative pressure pipe.

[0006] Furthermore, the upper end of the aforementioned sliding plate has a bent structure, and the installed annular extrusion wheel is inclined to press the reinforcing bar at the corner of the inner positioning nail and the support platform. The rotating shaft is connected to the inclined plate of the sliding plate through an elastic telescopic spring mechanism.

[0007] Furthermore, the aforementioned elastic telescopic spring mechanism includes a guide rod and a return spring. The through hole at the connection of the rotating shaft to the inclined plate is a strip-shaped hole. The rotating shaft is embedded in the through hole and is guided by a square head. One end of the guide rod is fixedly connected to the square head, and the other end passes through one end of the through hole along its length and is connected to a limit nut. The return spring is sleeved on the guide rod and its two ends abut against the square head and one end of the through hole.

[0008] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model, driven by a gear and rack, drives the sliding plate to move around the annular slide rail, which in turn drives the annular extrusion wheel to extrude in annular shape. The extrusion is smooth and reliable, fast and stable. The annular extrusion wheel rotates automatically, reducing friction and the possibility of damage to the steel bar. It saves time and effort, improves operational safety, and results in better bending quality. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the surrounding pressing mechanism used in a ring-shaped steel bar bending and welding platform;

[0010] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;

[0011] Figure 3 This is a schematic diagram of the locking mechanism;

[0012] Figure 4 This is a schematic diagram of the end face structure of the starting positioning platform;

[0013] Figure 5 This is a top view schematic diagram of the surrounding pressing mechanism used in a ring-shaped rebar bending and welding platform. Detailed Implementation

[0014] The utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0015] Example 1: As Figures 1-5 As shown, a circumferential pressing mechanism for a ring-shaped rebar bending and welding platform includes a ring-shaped pressing wheel 301, a sliding plate 302, and a ring-shaped slide rail 303. The ring-shaped pressing wheel 301 is rotatably connected to a rotating shaft 304, which is fixedly connected to an L-shaped sliding plate 302. The sliding plate 302 passes through a ring-shaped through groove 305 provided on a support platform 1 and is fixedly connected to a slider 306. The ring-shaped slide rail 303, which cooperates with the slider 306, is fixedly connected to the bottom of the support platform 1 and is consistent with the shape of the inner positioning pin 2 and is parallel inside and outside. The sliding plate 302 is connected to a drive motor 307, which is fixedly connected to a drive gear 308. A ring-shaped rack 309 that meshes with the drive gear 308 is fixedly connected to the bottom of the support platform 1 and located inside the ring-shaped slide rail 303. Driven by the gear and rack, the sliding plate moves around the ring-shaped slide rail, thereby driving the ring-shaped pressing wheel to perform ring-shaped pressing. The pressing is smooth and reliable, fast and stable. The ring-shaped pressing wheel rotates automatically, reducing friction and the possibility of damage to the rebar.

[0016] To avoid the dust generated during the pressing process from affecting the environment, the sliding plate 302 is equipped with an upward-facing dust collection hood 310. The dust collection hood 310 is fixedly connected to the lower end of the sliding plate 302 and is connected to the negative pressure dust collection device 312 through the negative pressure pipe 311. During the pressing process, the generated iron filings and dust can fall into the dust collection hood, and through the negative pressure, it is easier to collect, greatly improving the working environment.

[0017] To accommodate the transition at the ends of the reinforcing bars, the upper end of the sliding plate 302 has a bent structure. The installed annular pressing wheel 301 presses the reinforcing bar 5 at an angle at the corner between the inner positioning nail 2 and the support platform 1. The rotating shaft 304 is connected to the inclined plate of the sliding plate 302 through an elastic telescopic spring mechanism 313. The elastic telescopic spring mechanism 313 includes a guide rod 314 and a return spring 315. The through hole 316 at the connection of the rotating shaft 304 to the inclined plate is a strip-shaped hole. The rotating shaft 304 is inserted into the through hole with a square head for guidance. The guide rod is fixedly connected at the square head. One end of 314 passes through one end of the through hole along its length and is connected to a limit nut 317. The return spring 315 is sleeved on the guide rod 314 and its two ends abut against the square head and one end of the through hole. When the force encountered is greater than the pressure of the return spring, the structure will yield. The initial force of the return spring can meet the needs of pressing the reinforcing bar. This structure, in conjunction with the inclined pressing of the reinforcing bar, can realize the transition pressing at the joint of the reinforcing bar, improving safety and reliability. This structure is more conducive to the joint of the first and last ends of the ring. The pressing wheel of the inclined elastic surface is also convenient for disassembling the welded ring reinforcing bar.

[0018] Example 2: As Figures 1-5As shown, a ring-shaped rebar bending and welding platform includes a square support platform 1, inner positioning pins 2, a surrounding pressing mechanism 3, and a locking mechanism 4. The support platform 1 is provided with a ring-shaped inner positioning pin 2. The surrounding pressing mechanism 3 is installed on the support platform 1 and moves in a ring around the outer side of the inner positioning pin 2, used to bend the rebar 5 along the ring-shaped inner positioning pin 2. Multiple locking mechanisms 4 are arranged at intervals on the support platform 1 and arranged in a ring around the inner side of the inner positioning pin 2, used to lock the rebar 5 on the support platform 1. The surrounding pressing mechanism of the ring-shaped rebar bending and welding platform is mainly used to achieve surrounding of flat or ring-shaped structures. Four short columns 10 are fixedly connected to the bottom of the support platform 1 near the four corners. The four short columns 10 are connected to the top frame 11. The top frame 11 is provided with longitudinal and transverse beams near the center, and the longitudinal and transverse beams are connected by a central... The column 12 is fixedly connected to the bottom of the support platform 1, so that the support platform can still be a whole structure after the annular groove is set. The top frame 11 is connected to four support legs 13. The four support legs 13 are symmetrically and detachably fixedly connected to the bottom of the top frame 11. That is, the top of the support leg 13 is fitted into the positioning rod 14 set at the bottom of the top frame 11 and locked with bolts 15. The detachable connection method allows for replacement with different support platforms, reducing costs. A crossbeam 16 is fixedly connected between two adjacent support legs 13, and the four support legs 13 are fixedly connected by a cross beam 17. Anchor bolts 18 are fixedly connected to the bottom of the column 13. The cross beam and cross beam can improve the stability of the support frame. The anchor bolts can improve the support stability and adjust the height to adapt to uneven ground.

[0019] After the reinforcing bar is positioned at the starting position by a surrounding pressing mechanism, it is bent into a ring shape around the inner positioning nail and locked by a locking mechanism, realizing automatic ring winding. After positioning, it is convenient and quick to weld the lap joint of the reinforcing bar, improving the welding quality and the manufacturing quality of the ring reinforcing bar, reducing the dimensional error of the ring reinforcing bar. Electric winding saves time and labor, eliminating the need for manual winding, resulting in better precision, higher safety, and better bending quality. It ensures that the bending arc and circumference dimensions meet the welding requirements of the reinforcing cage. After positioning, the two free ends of the reinforcing bar are welded, making welding easy. The welding point is not subjected to external force during the welding process, ensuring the welding stability of the welding point and greatly improving the welding quality. It also improves the welding quality and welding dimensions of the reinforcing cage.

[0020] To achieve rapid positioning, a circumferential pressing mechanism for a ring-shaped rebar bending and welding platform also includes a starting positioning platform 6 detachably fixed to a support platform 1. The starting positioning platform 6 is located outside the inner positioning nail 2 of the ring. The starting positioning platform 6 is used to position the starting position of the rebar 5. The starting positioning platform 6 has a limiting groove 7 on one side of the rebar 5 and a slope surface 8 on the other side. The starting end of the rebar is inserted into the limiting groove 7 to achieve axial and lateral positioning of the initial end. After one revolution, the rebar is lapped through the slope surface transition, resulting in a more stable lap. The detachable structure allows for ring bending of different rebar sizes.

[0021] To stably achieve the bending and wrapping of the reinforcing bars around the inner positioning pin of the ring to form a ring structure, the wrapping pressing mechanism 3 includes an annular pressing wheel 301, a sliding plate 302, and an annular slide rail 303. The annular pressing wheel 301 is rotatably connected to a rotating shaft 304, and the rotating shaft 304 is fixedly connected to the L-shaped sliding plate 302. The sliding plate 302 passes through the annular through groove 305 provided on the support platform 1 and is fixedly connected to the slider 306. The annular slide rail 303, which cooperates with the slider 306, is fixedly connected to the bottom of the support platform 1 and is connected to the inner positioning pin of the ring. The positioning pins 2 maintain a consistent shape and are parallel inside and out. The sliding plate 302 is connected to the drive motor 307, and the drive motor 307 is fixedly connected to the drive gear 308. The annular rack 309, which meshes with the drive gear 308, is fixedly connected to the bottom of the support platform 1 and located inside the annular slide rail 303. Driven by the gear and rack, the sliding plate moves around the annular slide rail, which in turn drives the annular extrusion wheel to extrude in annular shape. The extrusion is smooth and reliable, fast and stable. The annular extrusion wheel rotates automatically, reducing friction and the possibility of damage to the steel bars.

[0022] To achieve rapid locking, the locking mechanism 4 includes a pressing hook 401 and a driving hydraulic cylinder 402. The upper end of the pressing hook 401 is provided with a "7"-shaped bent hook part 403, which passes through the upper through hole 404 of the support platform 1 and is hinged to the support platform 1 at this point. The hinge point between the pressing hook 401 and the support platform 1 is located inside the annular inner positioning pin 2 and the pressing hook 401 is located at the gap between two adjacent inner positioning pins 2. The lower end of the pressing hook 401 is hinged to the cylinder rod of the driving hydraulic cylinder 402. The tail end of the cylinder seat of the driving hydraulic cylinder 402 is hinged to the hinge seat 40 on the top of the support platform 1. 5. After the hydraulic cylinder 402 extends, it can press the pressing hook 401 downward to press the steel bar 5 onto the support platform 1 and contact the inner positioning nail 2. The locking mechanism of this structure can stably fix the steel bar at the corner of the support platform and the inner positioning nail. The pressing and locking of the "7" shaped bending hook part is more reliable. The size meets the requirement that after just rotating, the resultant force on the steel bar can be concentrated at the corner of the support platform and the inner positioning nail, improving the accuracy of the steel bar bending circumference and the reliability of locking. The pressing hook 401 bends downward at the hinge seat. This structure is more conducive to connecting the hydraulic cylinder after passing through the support platform.

[0023] In order to lock the rebar at different positions after pressing, a detection sensor 9 is installed in front of each locking mechanism 4. The detection sensor 9 is fixedly connected to the bottom of the support platform 1 and the probe can face the drive gear 308. The detection sensor detects the pressed rebar, sets a distance after pressing, and controls the locking mechanism to lock. The detection sensor 9 is connected to the controller, and the controller is connected to the drive hydraulic cylinder and drive motor of the locking device. After the drive motor is detected and travels a set distance, the drive hydraulic cylinder can be automatically controlled to lock the rebar.

[0024] Since the first and last reinforcing bars need to be welded at the starting position, the length of the pressing hook 401 set in the starting position of the locking mechanism 4 is sufficient to press the lap height of the two reinforcing bars 5, thereby satisfying the pressing of the two reinforcing bars and improving the welding stability.

[0025] A locking mechanism 4 is provided at the starting position of the ramp surface 8, which makes it easier to press and overlap the ramp surface, and prevents it from lifting up when it reaches the horizontal position during the pressing process, thus improving stability.

[0026] To avoid the dust generated during the pressing process from affecting the environment, the sliding plate 302 is equipped with an upward-facing dust collection hood 310. The dust collection hood 310 is fixedly connected to the lower end of the sliding plate 302 and is connected to the negative pressure dust collection device 312 through the negative pressure pipe 311. During the pressing process, the generated iron filings and dust can fall into the dust collection hood, and through the negative pressure, it is easier to collect, greatly improving the working environment.

[0027] To accommodate the transition at the ends of the reinforcing bars, the upper end of the sliding plate 302 has a bent structure. The installed annular pressing wheel 301 presses the reinforcing bar 5 at an angle at the corner between the inner positioning nail 2 and the support platform 1. The rotating shaft 304 is connected to the inclined plate of the sliding plate 302 through an elastic telescopic spring mechanism 313. The elastic telescopic spring mechanism 313 includes a guide rod 314 and a return spring 315. The through hole 316 at the connection of the rotating shaft 304 to the inclined plate is a strip-shaped hole. The rotating shaft 304 is inserted into the through hole with a square head for guidance. The guide rod is fixedly connected at the square head. One end of 314 passes through one end of the through hole along its length and is connected to a limit nut 317. The return spring 315 is sleeved on the guide rod 314 and its two ends abut against the square head and one end of the through hole. When the force encountered is greater than the pressure of the return spring, the structure will yield. The initial force of the return spring can meet the needs of pressing the reinforcing bar. This structure, in conjunction with the inclined pressing of the reinforcing bar, can realize the transition pressing at the joint of the reinforcing bar, improving safety and reliability. This structure is more conducive to the joint of the first and last ends of the ring. The pressing wheel of the inclined elastic surface is also convenient for disassembling the welded ring reinforcing bar.

[0028] Example 3: The operation method of a ring-shaped rebar bending and welding platform is as follows: A section of rebar is inserted into the limiting groove of the slope surface. The platform moves around the pressing mechanism from the starting position and presses the rebar to contact the inner positioning nail and the support platform. When it reaches the set position, the locking mechanism locks the rebar. The platform continues to press and move around the pressing mechanism to the next position and locks it. When it passes the slope surface, the ring pressing roller presses the rebar along the slope and the starting point of the slope is locked. When it reaches the lap position, the ring pressing roller presses the end of the rebar horizontally to lap the starting end of the rebar, and the locking device at the end presses and locks the lapped rebar sections. After fixing, the two rebar sections are welded. After welding, the platform is removed and the next ring-shaped rebar bending and welding is performed.

[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A circumferential pressing mechanism for a ring-shaped rebar bending and welding platform, characterized in that: The system includes an annular extrusion wheel (301), a sliding plate (302), and an annular slide rail (303). The annular extrusion wheel (301) is rotatably connected to a rotating shaft (304), and the rotating shaft (304) is fixedly connected to an L-shaped sliding plate (302). The sliding plate (302) passes through an annular through groove (305) provided on the support platform (1) and is fixedly connected to a slider (306). The annular slide rail (303), which cooperates with the slider (306), is fixedly connected to the bottom of the support platform (1) and is consistent with the shape of the annular inner positioning pin (2) and parallel inside and outside. The sliding plate (302) is connected to a drive motor (307), and the drive motor (307) is fixedly connected to a drive gear (308). The annular rack (309) that meshes with the drive gear (308) is fixedly connected to the bottom of the support platform (1) and is located inside the annular slide rail (303).

2. The circumferential pressing mechanism for a ring-shaped rebar bending and welding platform according to claim 1, characterized in that: The sliding plate (302) is provided with an upward-facing dust collection hood (310), which is fixedly connected to the lower end of the sliding plate (302) and connected to the negative pressure dust collection device (312) through a negative pressure pipe (311).

3. The circumferential pressing mechanism for a ring-shaped rebar bending and welding platform according to claim 1, characterized in that: The upper end of the sliding plate (302) is a bent structure. The installed annular extrusion wheel (301) presses the steel bar (5) at an angle at the corner between the inner positioning nail (2) and the support platform (1). The rotating shaft (304) is connected to the inclined plate of the sliding plate (302) through the elastic telescopic spring mechanism (313).

4. The circumferential pressing mechanism for a ring-shaped rebar bending and welding platform according to claim 3, characterized in that: The elastic telescopic spring mechanism (313) includes a guide rod (314) and a return spring (315). The through hole (316) at the connection of the rotating shaft (304) to the inclined plate is a strip-shaped hole. The rotating shaft (304) is embedded in the through hole and is guided by a square head. One end of the guide rod (314) is fixedly connected to the square head, and the other end passes through one end of the through hole in the length direction and is connected to a limit nut (317). The return spring (315) is sleeved on the guide rod (314) and its two ends abut against the square head and one end of the through hole.

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