CN217343341U

CN217343341U - Full-automatic production device mechanism for U-shaped steel bars of box girder

Info

Publication number: CN217343341U
Application number: CN202221214045.5U
Authority: CN
Inventors: 曹勇; 郑刚; 胡林; 周正述
Original assignee: Chengdu Gute Machienry Works Co ltd
Current assignee: Chengdu Gute Machienry Works Co ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-09-02
Anticipated expiration: 2032-05-20

Abstract

The utility model provides a full-automatic production device mechanism for box girder U-shaped steel bars, belonging to the technical field of steel bar processing equipment, comprising a bending device and a placing table for placing steel bars. The bending device includes two first bending mechanisms and two second bending mechanisms. Two bending mechanisms, the first bending mechanism includes a first workbench and a first bending assembly arranged on the first workbench, and the second bending mechanism includes a second workbench and a second workbench arranged on the second workbench for bending steel bars Two bending components, and a transfer component is also arranged on the first worktable. When the staff puts the steel bar to be bent on the bending device, first start the second bending mechanism, bend the two ends of the steel bar to get hooks, and then bend the steel bar into a "U" shape through the first bending mechanism, and finally By sending the bent U-shaped steel bars to the placing table, there is no need to manually support the steel bars during the bending process, and the automatic bending process of the U-shaped steel bars of the box girder is realized, which has the advantages of saving manpower and improving the bending processing efficiency of steel bars. .

Description

Full-automatic production device mechanism for U-shaped steel bars of box girder

Technical Field

The utility model relates to a reinforcing bar processing equipment technical field discloses a full automatic production device mechanism of case roof beam U type reinforcing bar.

Background

With the investment of the country in the urban road construction direction, the domestic road and bridge construction technology is continuously improved. The box girder is as the indispensable structure in road and bridge construction, and its manufacturing technology is constantly maturing.

There is U shaped steel muscle in the case roof beam, and U shaped steel muscle is the U type for whole, and the equal bending play in reinforcing bar both ends head has the crotch. In the prior art, workers typically bend the bars by means of a bar bender.

However, as the reinforcing steel bars are too long, in the process of bending the reinforcing steel bars, workers need to manually hold the reinforcing steel bars in the whole process, and then the reinforcing steel bar bending machine bends the bending parts on the reinforcing steel bars one by one, which is very labor-consuming, and the reinforcing steel bars moving in the bending process are easy to bring potential safety hazards to the workers.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the utility model provides a full automatic production device mechanism of case roof beam U type reinforcing bar.

In order to achieve the purpose of the utility model, the utility model adopts the following technical scheme:

the full-automatic production device mechanism for the U-shaped steel bars of the box girder comprises a bending device and a placing platform which is positioned on one side of the bending device and used for placing the steel bars;

the bending device comprises two first bending mechanisms symmetrically arranged in the horizontal linear direction and second bending mechanisms symmetrically arranged on two sides of the two first bending mechanisms, each first bending mechanism comprises a first workbench, a first bending assembly used for bending the steel bars is arranged on each first workbench, each second bending mechanism comprises a second workbench, a second bending assembly used for bending the steel bars is vertically arranged on each second workbench in a lifting mode, and a transfer assembly used for transferring the steel bars to the placing table from the first workbench is arranged on each first workbench.

Further, first crooked subassembly includes first cover half and first bull stick, and first cover half is fixed to be set up on first workstation, rotates on the first workstation and is provided with first carousel, and first bull stick is fixed to be set up on first carousel, is provided with in the first workstation to be used for ordering about first carousel around first cover half pivoted driving motor.

Further, the second bending assembly comprises a second fixed die and a second rotating rod, the second fixed die vertically ascends and descends on the second workbench, a second rotary table is rotatably arranged on the outer side of the second fixed die on the second workbench, the second rotating rod vertically ascends and descends on the second rotary table, a second driving motor used for driving the second rotary table to rotate is arranged in the second workbench, and a driving assembly used for driving the second fixed die and the second rotating rod to ascend and descend is arranged in the second workbench.

Further, the transfer assembly comprises a first installation piece and a second installation piece, the first installation piece is arranged in a first workbench in a sliding mode, a first cylinder used for ordering the first installation piece to vertically slide is arranged in the first workbench, the second installation piece is arranged on the first installation piece in a horizontal sliding mode, a first driving source used for ordering the second installation piece to be close to or far away from the placing platform is arranged in the first workbench, and a supporting platform used for supporting the steel bars is arranged on one side, close to the placing platform, of the top of the second installation piece.

Furthermore, place the platform and enclose the regional of unloading of "U" word that closes, place the edge of platform and go up to be close to the regional rotation of unloading and be provided with the stripper, place bench and be provided with and be used for ordering about stripper pivoted second driving source.

Further, all be provided with clamping component on first workstation and the second workstation, clamping component includes fixing base, sliding seat and second cylinder, and fixing base and sliding seat setting are on the roof of first workstation and second workstation, and the sliding seat is located the one side that the fixing base is close to the platform of placing, and the second cylinder is used for ordering about the sliding seat and keeps away from or be close to the fixing base.

Furtherly, the built-in third cylinder that has the elevating platform and be used for ordering about the vertical lift of elevating platform of second workstation, clamping component on the second workstation sets up on the elevating platform.

Further, the lower part of the bending device is provided with a track parallel to the arrangement direction of the first workbench and the second workbench, the first workbench and the second workbench are arranged on the track in a sliding mode, and the first workbench and the second workbench are provided with limiting assemblies used for limiting the sliding of the first workbench and the second workbench.

Further, spacing subassembly includes the fourth cylinder, and fixed the setting is by the skid proof head on the piston rod of fourth cylinder, and the skid proof head can the butt on the track.

The application at least comprises the following beneficial effects:

the embodiment of the application provides a full automatic production device mechanism of case roof beam U type reinforcing bar, including the bending apparatus with be used for placing the platform of placing of reinforcing bar, the bending apparatus includes two first bending mechanism and two second bending mechanism, first bending mechanism includes first workstation and the first crooked subassembly of setting on first workstation, the second bending mechanism includes the second workstation and sets up the second crooked subassembly that is used for crooked reinforcing bar on the second workstation, still be provided with on the first workstation and transfer the subassembly.

When the staff will wait to bend the reinforcing bar and put on bending device, start two second bending mechanism earlier, buckle out the crotch with the both ends of reinforcing bar, two first bending mechanism of rethread are buckled into "U" words with the reinforcing bar, send out to placing the bench by transferring the U shaped steel muscle after the subassembly will buckle at last, the bending process in need not the manual work and holds in the palm the reinforcing bar, use manpower sparingly, realize the automatic process of buckling of case roof beam U shaped steel muscle, the machining efficiency of U shaped steel muscle has been improved.

Drawings

Fig. 1 is an overall structural schematic diagram of a full-automatic production apparatus mechanism according to an embodiment of the present application.

Fig. 2 is a schematic internal structural view of a first bending mechanism according to an embodiment of the present application.

Fig. 3 is a schematic internal structural view of a second bending mechanism according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a transfer assembly according to an embodiment of the present disclosure.

Fig. 5 is a partial structural schematic view of a placing table according to an embodiment of the present application.

Wherein, 1, bending device; 11. a first bending mechanism; 111. a first table; 112. a first flexure assembly; 1121. a first stationary mold; 1122. a first rotating lever; 1123. a first turntable; 1124. a first drive motor; 113. a transfer assembly; 1131. a first mounting piece; 1132. a second mounting piece; 1133. a first cylinder; 1134. a first drive source; 1135. a support platform; 12. a second bending mechanism; 121. a second table; 122. a second flexure assembly; 1221. a second stationary mold; 1222. a second rotating lever; 1223. a second turntable; 1224. a second drive motor; 1225. a fixed rod cylinder; 1226. a rotating rod cylinder; 13. a clamping assembly; 131. a fixed seat; 132. a movable seat; 133. a second cylinder; 134. a lifting platform; 135. a third cylinder; 14. a limiting component; 141. a fourth cylinder; 142. an anti-slip head; 2. a placing table; 21. a discharge area; 22. a stripper plate; 23. a second drive source; 3. a track.

Detailed Description

For better understanding of the above technical solutions, the above technical solutions will be described in detail with reference to fig. 1 to 5 and specific embodiments of the specification.

The embodiment of the application discloses full automatic production device mechanism of case roof beam U type reinforcing bar. Referring to fig. 1, 2 and 3, the production apparatus structure includes a bending apparatus 1 and a placing table 2. The bending device 1 includes two first bending mechanisms 11 and two second bending mechanisms 12, the two first bending mechanisms 11 are linearly arranged, the two first bending mechanisms 11 are symmetrical to each other, the two second bending mechanisms 12 are respectively disposed on two sides of the two first bending mechanisms 11 along the arrangement direction of the two first bending mechanisms 11, and the two second bending mechanisms 12 are symmetrical to each other. First bending mechanism 11 includes first workstation 111, is equipped with first crooked subassembly 112 on the mesa of first workstation 111, and second bending mechanism 12 includes second workstation 121, is equipped with second bending mechanism 12 on the mesa of second workstation 121, and first bending mechanism 11 and second bending mechanism 12 all are used for crooked reinforcing bar. The placing table 2 is located on one side of the bending device 1, the two first bending mechanisms 11 and the two second bending mechanisms 12 are located on the same side of the placing table 2, and the two first working tables 111 are provided with a transfer assembly 113 for transferring the reinforcing steel bars from the first working tables 111 to the placing table 2.

The staff places the reinforcing bar on first workstation 111 and second workstation 121 along the array direction of first workstation 111 and second workstation 121, by the crooked crotch of bending the both ends of reinforcing bar of the crooked subassembly 122 on two second workstations 121, the bending assembly on two first workstations 111 becomes the U type with the whole bending of reinforcing bar again, the in-process of the crooked action of the crooked subassembly 122 of second, the both ends of reinforcing bar are drawn in to placing 2 one side of platform, and place on placing platform 2, in order to guarantee reinforcing bar bending type. After the U-shaped steel bar is bent, the transfer assembly 113 on the first table 111 is operated to completely transfer the U-shaped steel bar onto the placing table 2. In the whole process of bending, the steel bar is not supported manually by workers, automatic bending forming of the U-shaped steel bar is achieved, operation is labor-saving and convenient, and the bending process is safe and reliable.

Referring to fig. 1 and 2, in the embodiment of the present application, the first bending assembly 112 includes a first fixing die 1121 and a first rotating rod 1122, the first fixing die 1121 is vertically and fixedly installed on a top surface of the first workbench 111, the shape of the first fixing die 1121 is matched with the shape of a U-shaped bend at the inner side of a target U-shaped steel bar, a first rotating disc 1123 is rotatably installed on the surface of the first workbench 111, the first rotating disc 1123 surrounds the outer side of the first fixing die 1121, the first rotating rod 1122 is installed on the first rotating disc 1123, and a second driving source 23 for driving the first rotating disc 1123 to rotate is disposed in the first workbench 111. In the embodiment of the present application, the first driving motor 1124 may be a servo motor, and an output shaft of the first driving motor 1124 is drivingly connected to the first turntable 1123 through a gear.

When the staff is laying the reinforcing bar, place the reinforcing bar between first decide mould 1121 and first bull stick 1122, after first driving motor 1124 starts, drive first bull stick 1122 around first decide mould 1121 and rotate, because on the bending component of the remaining joint of reinforcing bar on other workstations, consequently the reinforcing bar on first workstation 111, around first decide mould 1121, rotates and is crooked along with first bull stick 1122. Through adopting controllers such as PLC to edit servo motor's rotation number of turns and slew velocity in advance, can the bending angle and the deformation rate of accurate control reinforcing bar, reinforcing bar bending is accurate.

Referring to fig. 1 and 3, in the embodiment of the present application, the second bending assembly 122 includes a second fixed mold 1221 and a second rotating rod 1222, the second fixed mold 1221 is vertically installed on a top table of the second working platform 121 in an up-and-down manner, the second fixed mold 1221 includes fixed rods respectively located at two sides of a steel bar to be bent, a second rotating plate 1223 is rotatably installed on the table of the second working platform 121, a second driving motor 1224 is disposed in the second working platform 121 and is used for driving the second rotating plate 1223 to rotate around the second fixed mold 1221, the second rotating rod 1222 is vertically movable with respect to the second rotating plate 1223, and a driving assembly for driving the second fixed mold 1221 and the second rotating rod 1222 to move up and down is disposed in the second working platform 121. Specifically, second driving motor 1224 can adopt servo motor, and drive assembly includes fixed pole cylinder 1225 and bull stick cylinder 1226, and fixed pole cylinder 1225 sets up inside second workstation 121, and the piston rod of fixed pole cylinder 1225 is vertical to be connected in the bottom of second fixed mould 1221, and bull stick cylinder 1226 fixed mounting is in the bottom of second carousel 1223, and the piston rod of the cylinder of bull stick is vertical to be connected in the bottom of second bull stick 1222.

Through placing the reinforcing bar between two fixed poles on the second cover half 1221, order about second bull stick 1222 again and rotate around second cover half 1221 and bend out the crotch with the fixed pole of the head laminating second cover half 1221 of reinforcing bar, later, by the fixed pole cylinder 1225 in the drive assembly and the bull stick cylinder 1226 piston rod withdraw, make second cover half 1221 and second bull stick 1222 drop to under the second workstation 121 mesa, make things convenient for first bending mechanism 11 to carry out the both ends of reinforcing bar inwards buckling when the U type is crooked to the reinforcing bar. The bending process of the U-shaped steel bar is labor-saving, and the bending process is full-automatic and smooth.

Referring to fig. 1, 2 and 4, in the present embodiment, the transfer assembly 113 on the first table 111 includes a first mounting tab 1131 and a second mounting tab 1132. Specifically, the first bending assembly 112 located in the first workbench 111 is provided with a mounting plate perpendicular to the arrangement direction of the two first workbench 111 on one side close to the symmetrical plane of the two first workbench 111, a first slide rail is vertically mounted on the mounting plate, the first mounting piece 1131 is slidably mounted on the first slide rail, the second slide rail is horizontally mounted on the first mounting piece 1131, and the second mounting piece 1132 is slidably mounted on the first slide rail. The first workbench 111 is internally provided with a first cylinder 1133 for driving the first mounting plate 1131 to vertically slide, the first cylinder 1133 is fixedly connected with the first workbench 111 through a bolt, and a piston rod of the first cylinder 1133 is connected with the first mounting plate 1131. A first driving source 1134 for driving the second installation piece 1132 to slide is further disposed in the first workbench 111, and a supporting platform 1135 is disposed on one side of the top of the second installation piece 1132 close to the placing platform 2, and is used for lifting up the reinforcing steel bar between the first fixing mold 1121 of the first workbench 111 and the first rotating rod 1122 by using the supporting platform 1135 when the first installation piece 1131 rises and the second installation piece 1132 moves towards the placing platform 2, and can push the reinforcing steel bar to move towards the placing platform 2.

In this embodiment, the first driving source 1134 may adopt a servo motor, a rack is disposed on the first mounting piece 1131 along the length direction of the second slide rail, and the first driving source 1134 is engaged with the rack through a gear to drive the second mounting piece 1132 to move horizontally relative to the first mounting piece 1131. In other embodiments, the sliding directions of the first mounting pieces 1131 and the second mounting pieces 1132 can be exchanged, and the sliding manners of the first mounting pieces 1131 and the second mounting pieces 1132 can be driven in various combinations. For example, in one embodiment, the first mounting plate 1131 may be slidably mounted on a mounting plate in the first working platform 111 along a horizontal direction, the second mounting plate 1132 may be slidably mounted on the first mounting plate 1131 along a vertical direction, and both the first mounting plate 1131 and the second mounting plate 1132 may be slid by an air cylinder.

In this embodiment, after the first bending mechanism 11 and the second bending mechanism 12 complete the bending operation of the steel bars, an operator starts the first cylinder 1133 and the first driving source 1134 in sequence through programming of a PLC or a computer, so that the second mounting piece 1132 on the first workbench 111 is lifted, the steel bars bent between the first fixing mold 1121 and the second rotating rod 1222 on the first workbench 111 are lifted upwards by using the supporting platform 1135 on the second mounting piece 1132, then the second mounting piece 1132 moves towards the placing platform 2 and sends the steel bars to the placing platform 2, finally, the first cylinder 1133 and the first driving source 1134 are reset in sequence, and the second mounting piece 1132 returns to the original position in the first workbench 111 after placing the steel bars on the placing platform 2. The reinforcing bar is transferred through transferring the subassembly 113, reducible staff's work load, and in time empty the reinforcing bar on the bending apparatus 1, also can be convenient for the staff to continue crooked next reinforcing bar, improve reinforcing bar bending efficiency.

Referring to fig. 1 and 5, in the embodiment of the present application, the placing table 2 is composed of a plurality of placing table tops, the plurality of placing table tops enclose a "U" shape, and a discharge area 21 of the U-shaped steel bar is provided in an opening area of the "U" shape. In order to enable the U-shaped steel bars to be stored into the discharging area 21 one by one, a discharging plate 22 is rotatably mounted at the edge of the placing table 2 near the discharging area 21, and a second driving source 23 for driving the discharging plate 22 to rotate is arranged on the placing table 2. The second driving source 23 may be a motor that is connected to the rotation shaft of the discharge plate 22 through a gear transmission so as to rotate the discharge plate 22. The second driving source 23 can also be a cylinder, and is hinged below the placing table 2 through the cylinder, and a piston rod of the cylinder is hinged at the movable end of the discharging plate 22, so that the piston rod of the cylinder stretches out and draws back to drive the discharging plate 22 to rotate up and down. In this application embodiment, second driving source 23 is the cylinder, and the cylinder can provide more stable holding power, and the support is placed the U shaped steel muscle on the platform 2 and is more stable.

In order to further improve the safety and the bending accuracy of the bending apparatus 1 during the process of bending the steel bars, in the embodiment of the present application, the clamping assemblies 13 are disposed on the first working table 111 and the second working table 121. The clamping assembly 13 includes a fixed seat 131, a movable seat 132 and a second cylinder 133, the fixed seat 131 and the movable seat 132 are arranged horizontally perpendicular to the arrangement direction of the first workbench 111 and the second workbench 121, a piston rod of the second cylinder 133 is connected to a side of the movable seat 132 away from the fixed seat 131, and the second cylinder 133 is used for driving the movable seat 132 to approach or depart from the fixed seat 131. In particular, the clamping assemblies 13 on the two first tables 111 are located on the side of the first bending assembly 112 close to the symmetry plane, and the clamping assemblies 13 on the two second tables 121 are located on the side of the second bending assembly 122 close to the symmetry plane.

When the staff places the reinforcing bar on first workstation 111 and second workstation 121, make the reinforcing bar be located between fixing base 131 and sliding seat 132 simultaneously, restart second cylinder 133, the promotion sliding seat 132 of second cylinder 133 removes to fixing base 131 to the reinforcing bar between fixing base 131 and sliding seat 132 is pressed from both sides tightly. After clamping the reinforcing bar, carry out the bending operation to the reinforcing bar again, effectively prevent that the reinforcing bar from bursting out from crooked subassembly in bending process, improved the security of apparatus for producing structure.

Further, in the second workstation 121, still be equipped with elevating platform 134, vertically install third cylinder 135 in the second workstation 121, the piston rod of third cylinder 135 is connected with elevating platform 134, and the clamping component 13 on the second workstation 121 is established on elevating platform 134. Specifically, the fixed base 131 and the second cylinder 133 are both fixedly connected to the lifting table 134 by bolts, and the movable base 132 is perpendicular to the arrangement direction of the first working table 111 and the second working table 121 and is horizontally slidably mounted on the lifting table 134. By program control, before the steel bar is bent, the second cylinder 133 on the second worktable 121 is started to clamp the steel bar on the second worktable 121, and then the steel bar on the second worktable 121 is bent to form a hook. Afterwards, the second cylinder 133 on the second workbench 121 is reset to release the steel bar, the first cylinder 1133 on the first workbench 111 acts to clamp the steel bar, and the piston rod of the third cylinder 135 in the second workbench 121 is retracted, so that the fixed seat 131 and the movable seat 132 on the surface of the second workbench 121 are sunk below the table top of the second workbench 121, and the fixed seat 131 or the movable seat 132 on the second workbench 121 can be effectively prevented from blocking the steel bar in the process of bending the steel bar into a U shape by the first bending mechanism 11. The automation degree of the steel bar bending full-automatic production device mechanism is improved.

Further, a rail 3 parallel to the arrangement direction of the first table 111 and the second table 121 is disposed below the bending apparatus 1, and both the first table 111 and the second table 121 are slidably disposed on the rail 3. Through the first workbench 111 or the second workbench 121 on the sliding rail 3, the bending position of the bending device 1 to the steel bar can be adjusted, so that U-shaped steel bars with different sizes can be produced, and the applicability is improved.

In order to limit and fix the first workbench 111 and the second workbench 121 on the track 3, a limiting component 14 for limiting the sliding of the first workbench 111 and the second workbench 121 is further arranged on the first workbench 111 and the second workbench 121. In this embodiment, the limiting assembly 14 includes a fourth cylinder 141, the fourth cylinder 141 is fixed on the first workbench 111 and the second workbench 121 by bolts, a piston head of the fourth cylinder 141 faces the track 3 vertically, a piston rod of the fourth cylinder 141 is connected with an anti-slip head 142, and the anti-slip head 142 may be made of rubber. After the staff moves first workstation 111 and second workstation 121 to suitable position, start fourth cylinder 141, can support tight track 3 through skid-proof head 142 to the restriction first workstation 111 or second workstation 121 move on track 3, spacing effect is reliable, and spacing operation is simple quick.

The utility model discloses a working process does: the worker manually puts the reinforcing bars to be bent into the bending apparatus 1 such that the reinforcing bars are simultaneously positioned between the first fixed molds 1121 and the first rotating rods 1122 on the two first work tables 111 and between the second fixed molds 1221 and the second rotating rods 1222 on the two second work tables 121. Then, the worker manually starts or starts the second driving motor 1224 on the second working platform 121 through program control, so as to drive the second rotating rod 1222 on the second working platform 121 to rotate around the second fixed mold 1221, and bend the two ends of the steel bar out of the hook. Next, the fixed rod cylinder 1225 and the rotating rod cylinder 1226 in the second working table 121 operate to lower the second fixed mold 1221 and the second rotating rod 1222 below the table surface of the second working table 121, and then the first driving motor 1124 is activated to drive the first rotating rod 1122 on the first working table 111 to rotate around the first fixed mold 1121, so as to bend the steel bar into a "U" shape. Finally, first cylinder 1133 and the second drive in first workstation 111 move simultaneously, lift up the reinforcing bar on first workstation 111 from first decide 1121 and first bull stick 1122 within a definite time to send to place on the platform 2, accomplish the whole bending of "U" shaped steel muscle promptly and put the operation, need not the staff and continuously lift up the reinforcing bar, use manpower sparingly, and realize reinforcing bar bending and shaping automation process.

It should be apparent to those skilled in the art that while the preferred embodiments of the present invention have been described, additional variations and modifications to these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the technical range equivalent to the machine of the claims, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides a full automatic production device mechanism of case roof beam U type reinforcing bar which characterized in that: comprises a bending device (1) and a placing platform (2) which is positioned at one side of the bending device (1) and used for placing reinforcing steel bars;

the bending device (1) comprises two first bending mechanisms (11) symmetrically arranged in the horizontal straight line direction and second bending mechanisms (12) symmetrically arranged on two sides of the two first bending mechanisms (11), each first bending mechanism (11) comprises a first workbench (111), a first bending assembly (112) used for bending the steel bars is arranged on each first workbench (111), each second bending mechanism (12) comprises a second workbench (121), a second bending assembly (122) used for bending the steel bars is vertically arranged on each second workbench (121) in a lifting mode, and a transfer assembly (113) used for transferring the steel bars from the first workbench (111) to the placing table (2) is arranged on each first workbench (111).

2. The mechanism of the full-automatic production device for the U-shaped steel bars of the box girder according to claim 1, wherein the first bending assembly (112) comprises a first fixed die (1121) and a first rotating rod (1122), the first fixed die (1121) is fixedly arranged on the first workbench (111), a first rotating disc (1123) is rotatably arranged on the first workbench (111), the first rotating rod (1122) is fixedly arranged on the first rotating disc (1123), and a first driving motor (1124) for driving the first rotating disc (1123) to rotate around the first fixed die (1121) is arranged in the first workbench (111).

3. The mechanism of the full-automatic production device of the U-shaped steel bars of the box girders is characterized in that the second bending assembly (122) comprises a second fixed die (1221) and a second rotating rod (1222), the second fixed die (1221) is vertically arranged on the second workbench (121) in a lifting manner, a second rotating disc (1223) is rotatably arranged on the second workbench (121) and positioned outside the second fixed die (1221), the second rotating rod (1222) is vertically arranged on the second rotating disc (1223) in a lifting manner, a second driving motor (1224) for driving the second rotating disc (1223) to rotate is arranged in the second workbench (121), and a driving assembly for driving the second fixed die (1221) and the second rotating rod (1222) to lift is arranged in the second workbench (121).

4. The mechanism of the full-automatic production device of the U-shaped steel bars of the box girder according to claim 1, wherein the transfer assembly (113) comprises a first installation piece (1131) and a second installation piece (1132), the first installation piece (1131) is slidably arranged in a first workbench (111), a first cylinder (1133) for driving the first installation piece (1131) to vertically slide is arranged in the first workbench (111), the second installation piece (1132) is horizontally slidably arranged on the first installation piece (1131), a first driving source (1134) for driving the second installation piece (1132) to be close to or far away from the placing table (2) is arranged in the first workbench (111), and a supporting table (1135) for supporting the steel bars is arranged on one side, close to the placing table (2), of the top of the second installation piece (1132).

5. The mechanism of the full-automatic production device for the U-shaped steel bars of the box girders according to any one of claims 1 to 4, characterized in that the placing platform (2) is surrounded by a U-shaped unloading area (21), a stripper plate (22) is rotatably arranged on the edge of the placing platform (2) close to the unloading area (21), and a second driving source (23) for driving the stripper plate (22) to rotate is arranged on the placing platform (2).

6. The full-automatic production device mechanism for the U-shaped steel bars of the box girders according to claim 1, wherein the first workbench (111) and the second workbench (121) are respectively provided with a clamping assembly (13), the clamping assembly (13) comprises a fixed seat (131), a movable seat (132) and a second air cylinder (133), the fixed seat (131) and the movable seat (132) are arranged on the top walls of the first workbench (111) and the second workbench (121), and the second air cylinder (133) is used for driving the movable seat (132) to be far away from or close to the fixed seat (131).

7. The mechanism of the full-automatic production device for the U-shaped steel bars of the box girder as claimed in claim 6, wherein the second working table (121) is internally provided with a lifting table (134) and a third air cylinder (135) for driving the lifting table (134) to vertically lift, and the clamping assembly (13) on the second working table (121) is arranged on the lifting table (134).

8. The full-automatic production device mechanism for the U-shaped steel bars of the box girders according to claim 1, wherein a track (3) parallel to the arrangement direction of the first workbench (111) and the second workbench (121) is arranged below the bending device (1), the first workbench (111) and the second workbench (121) are both arranged on the track (3) in a sliding manner, and the first workbench (111) and the second workbench (121) are both provided with a limiting component (14) for limiting the sliding of the first workbench (111) and the second workbench (121).

9. The mechanism of the full-automatic production device for the U-shaped steel bars of the box girder according to claim 8, wherein the limiting assembly (14) comprises a fourth cylinder (141), a piston rod of the fourth cylinder (141) is fixedly provided with an anti-skid head (142), and the anti-skid head (142) can abut against the track (3).