A shield segment main reinforcement conveying and bending integrated forming machine

Abstract

The application discloses a shield segment main reinforcement conveying and bending integrated forming machine, which comprises a reinforcing steel bar conveying mechanism, a forming mechanism and a feeding unit; the reinforcing steel bar conveying mechanism comprises the feeding unit and the feeding unit; the forming mechanism is located at the rear side of the feeding unit and is installed on a first support frame; the forming mechanism comprises a clamping unit and a bending unit; the bending unit comprises a mounting plate, a servo motor, a lead screw, a moving plate and a plurality of limiting rollers; the servo motor is connected to the mounting plate; the lead screw is connected to the servo motor; the moving plate is sleeved on the lead screw; the plurality of limiting rollers are located on the moving plate; the reinforcing steel bars are located between the plurality of limiting rollers on the two sides of the reinforcing steel bars; the middle positions of the reinforcing steel bars are positioned on the clamping unit; the two sides of the bottom of the mounting plate are provided with guide rails; and the moving plate is slidably connected to the guide rails. The application solves the problem that, at present, whether reinforcing steel bars are bent or the reinforcing steel bars are bent again, manual conveying and re-bending are needed, manual conveying to different processing positions is needed for bending into an arc shape and secondary bending, and the production efficiency is affected.

Description

Technical Field

[0001] This invention belongs to the field of steel bar bending technology, and particularly relates to an integrated forming machine for conveying and bending the main reinforcement bars of tunnel segments. Background Technology

[0002] As the basic unit of tunnel lining structure, shield tunnel segments must withstand soil pressure, groundwater pressure, and special loads. The main reinforcing bars, as the primary load-bearing steel bars in the segments, work in conjunction with concrete to form a reinforced concrete structure, effectively resisting external loads, preventing segment cracking or damage, and ensuring the overall stability of the tunnel structure.

[0003] The current production operation mode is highly dependent on manual labor. Starting from the initial step of bending straight steel bars into an arc shape that meets the design requirements, the steel bars are completely transported to the bending station manually. Manual transport is not only slow, but it is also difficult to guarantee the accuracy and stability of each transport. This makes it easy for the positioning of the steel bars to deviate before bending, which in turn affects the accuracy of subsequent bending and forming.

[0004] After the steel bar is successfully bent into an arc shape, if some scenarios require the fabrication of a more complex steel cage, that is, the arc-shaped steel bar needs to be bent a second time, the arc-shaped steel bar must be manually transferred from the current workstation to the secondary bending workstation again. This process is not only cumbersome, but also prone to damage such as collision and deformation of the initially formed arc-shaped steel bar during the transfer process due to the uncertainty of manual operation. This results in the steel bar being in poor condition before the secondary bending, increasing the difficulty of the secondary bending and the scrap rate. Summary of the Invention

[0005] The purpose of this invention is to address the current problem that the main reinforcing bars of tunnel segments need to be bent into an arc shape before being transported to the welding station to be welded together with the stirrups. For some scenarios, the reinforcing cage needs to be bent a second time before being welded together with the arc reinforcing bars to form an arc reinforcing bar hoop. However, currently, whether it is bending the reinforcing bars or bending them a second time after bending, it is necessary to manually transport them for bending. Moreover, both bending into an arc shape and bending a second time require manual transport to different processing positions, which greatly affects production efficiency. Therefore, this invention proposes an integrated forming machine for conveying and bending the main reinforcing bars of tunnel segments.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an integrated forming machine for conveying and bending the main reinforcement of tunnel segments, comprising:

[0007] A steel bar conveying mechanism; it includes a material conveying unit and a material feeding unit;

[0008] The forming mechanism is located behind the feeding unit and is mounted on the first support frame. The forming mechanism includes a clamping unit and a bending unit. The clamping unit is mounted on the bending unit. The bending unit includes a mounting plate, a servo motor, a lead screw, a moving plate, and limiting rollers. The servo motor is connected to the mounting plate, the lead screw is connected to the servo motor, the moving plate is sleeved on the lead screw, and several limiting rollers are located on the moving plate. The two sides of the reinforcing bar are located between the several limiting rollers, and the middle position of the reinforcing bar is positioned on the clamping unit. Guide rails are provided on both sides of the bottom of the mounting plate, and the moving plate is slidably connected to the guide rails.

[0009] Furthermore, the aforementioned material transfer unit includes a second support frame and a conveyor chain. A connecting plate is provided on the second support frame, and a conveyor gear is provided on the connecting plate. The conveyor chain is sleeved on the conveyor gear, and the drive shaft passes through the conveyor gear on the same horizontal line. The motor is connected to the drive shaft.

[0010] Furthermore, limit frames are provided on both sides of the second support frame, and limit plates are provided on the limit frames.

[0011] Furthermore, the aforementioned feeding unit is connected to the tail of the material transfer unit. The feeding unit includes a third support frame, a stepped movable plate, and a stepped fixed plate. The stepped fixed plate is fixedly connected to the third support frame. Several vertically arranged linear motors are installed on the third support frame. Several stepped movable plates are connected to a moving column. Several slide rails are installed on the moving column. The slide rails are slidably connected to the linear motors. Several stepped fixed plates are connected through a fixed shaft.

[0012] Furthermore, the aforementioned fixed shaft is provided with several guide plates, several stepped fixed plates, and several stepped movable plates arranged in a cross pattern.

[0013] Furthermore, the mounting plate is provided with an arc-shaped groove.

[0014] Furthermore, the mounting plate is provided with a mounting groove, and the clamping unit includes a positioning plate, a rotating plate and a clamping block. The positioning plate is fixed on the mounting plate, the rotating plate is provided with a rotating ear, the positioning plate is provided with a lifting block, the two sides of the rotating ear are rotatably connected to the lifting block and the rotating plate respectively, the bottom of the mounting plate is provided with a connecting bracket, the connecting bracket is provided with a driving cylinder, the driving cylinder is provided with a moving block, and the lifting block passes through the mounting groove and is rotatably connected to the moving block.

[0015] Furthermore, a secondary bending device is also provided, located on both sides of the mounting plate. The secondary bending device includes a fourth support frame, a rotary motor, and a forming roller. A horizontal linear motor is provided on the fourth support frame, the outer wall of the connecting frame is slidably connected to the horizontal linear motor, the inner wall of the connecting frame is slidably connected to the vertical linear motor, the vertical linear motor is connected to the forming frame, the rotary motor is located inside the forming frame, a forming plate is provided at the bottom of the forming frame, an arc groove is provided on the forming plate, a cam is provided on the rotary motor, a bending roller is provided on the cam, the bending roller is located in the arc groove, and the forming roller is connected to the forming plate.

[0016] This invention provides an integrated forming machine for conveying and bending the main reinforcing bars of tunnel segments. A forming mechanism is installed at the rear end of the reinforcing bar conveying mechanism, and secondary bending devices are installed on both sides of the forming mechanism. When it is necessary to bend the reinforcing bars into an arc shape, the reinforcing bars are placed in batches onto a conveyor chain. The reinforcing bars are conveyed to a feeding unit via the conveyor chain. A stepped movable plate in the feeding unit, driven by a linear motor, sequentially conveys the reinforcing bars upwards. A guide plate conveys the reinforcing bars to a clamping unit. A driving cylinder pulls a moving block, thereby causing a lifting block to move downwards, which in turn causes a rotating ear to rotate. This causes the rotating plate to abut against the clamping block at the center of the reinforcing bar, completing the center positioning of the reinforcing bar. The two sides of the reinforcing bar are then positioned... Between the limiting rollers, a servo motor drives a lead screw to rotate, thereby moving a moving plate to bend the reinforcing bar along an arc-shaped forming groove to form the main rib. To produce reinforcing bars suitable for other applications, the bent main rib is subjected to a secondary bend. The secondary bending device moves along the horizontal and vertical linear motors to both sides of the main rib, clamping both sides of the main rib between the forming roller and the bending roller. The rotary motor rotates to perform a secondary bend on the bent main rib. This structure realizes integrated production of conveying, bending, and secondary bending. It can produce arc-shaped main ribs and perform secondary bending on arc-shaped main ribs according to requirements, greatly improving the production efficiency and quality of main ribs.

[0017] Therefore, this embodiment has the following advantages compared to the prior art:

[0018] A new integrated forming machine for conveying and bending the main reinforcement of tunnel tunnel segments solves the current problem that the main reinforcement of tunnel tunnel segments needs to be bent into an arc shape and then conveyed to the welding station to be welded together with the stirrups. For some scenarios, the reinforcement cage needs to be bent a second time and then welded together with the arc reinforcement to form an arc reinforcement hoop. However, currently, whether it is bending the reinforcement or bending it a second time, it is necessary to manually convey and bend it. Moreover, both bending into an arc shape and bending a second time require manual conveying to different processing positions, which greatly affects the production efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional view of an integrated forming machine for conveying and bending the main reinforcement bars of tunnel segments.

[0021] Figure 2 This is a three-dimensional view of the steel bar conveying mechanism in a shield tunnel segment main reinforcement conveying and bending integrated forming machine.

[0022] Figure 3 This is a three-dimensional view of the forming mechanism in an integrated forming machine for conveying and bending the main reinforcement of tunnel segments.

[0023] Figure 4 This is a cross-sectional view of the forming mechanism in a shield tunnel segment main reinforcement conveying and bending integrated forming machine.

[0024] Figure 5 This is a perspective view of a secondary bending device in an integrated forming machine for conveying and bending the main reinforcement of tunnel segments.

[0025] Legend:

[0026] 1- Rebar conveying mechanism (not shown); 2- Material conveying unit; 2a- Second support frame; 2b- Conveyor chain; 3- Feeding unit; 3a- Third support frame; 3b- Stepped movable plate; 3c- Stepped fixed plate; 4- Forming mechanism (not shown); 41- Clamping unit; 411- Positioning plate; 412- Rotating plate; 413- Clamping block; 42- Bending unit; 421- Mounting plate; 422- Servo motor; 423- Lead screw; 424- Moving plate; 425- Limiting roller; 5- First support frame; 6- Rebar; 7- Guide rail; 8- Connecting plate; 9- Conveyor gear; 10- Drive shaft ; 11-Limiting frame; 12-Limiting plate; 13-Linear motor; 14-Moving column; 15-Slide rail; 16-Guide plate; 17-Arc-shaped forming groove; 18-Mounting groove; 19-Rotating ear; 20-Lifting block; 21-Connecting bracket; 22-Drive cylinder; 23-Moving block; 24-Secondary bending device; 241-Fourth support frame; 242-Rotary motor; 243-Forming roller; 28-Horizontal linear motor; 29-Connecting frame; 30-Vertical linear motor; 31-Forming frame; 32-Forming plate; 33-Arc-shaped groove; 34-Cam; 35-Bending roller; 36-Fixed shaft. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of the embodiments of the present invention, it should be noted that the terms "upper" and "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0032] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1:

[0033] Please see Figure 1-5 This invention provides a technical solution: an integrated forming machine for conveying and bending the main reinforcement of tunnel segments, comprising:

[0034] Rebar conveying mechanism 1; which includes a material conveying unit 2 and a material feeding unit 3;

[0035] A forming mechanism 4 is located behind the feeding unit 3 and is mounted on the first support frame 5. The forming mechanism 4 includes a clamping unit 41 and a bending unit 42. The clamping unit 41 is mounted on the bending unit 42. The bending unit 42 includes a mounting plate 421, a servo motor 422, a lead screw 423, a moving plate 424, and limiting rollers 425. The servo motor 422 is connected to the mounting plate 421, the lead screw 423 is connected to the servo motor 422, the moving plate 424 is sleeved on the lead screw 423, and several limiting rollers 425 are located on the moving plate 424. The two sides of the reinforcing bar 6 are located between several limiting rollers 425, and the middle position of the reinforcing bar 6 is positioned on the clamping unit 41. Guide rails 7 are provided on both sides of the bottom of the mounting plate 421, and the moving plate 424 is slidably connected to the guide rails 7.

[0036] Specifically, see Figure 1-5 The material transfer unit 2 includes a second support frame 2a and a conveyor chain 2b. A connecting plate 8 is provided on the second support frame 2a, and a conveyor gear 9 is provided on the connecting plate 8. The conveyor chain 2b is sleeved on the conveyor gear 9. A drive shaft 10 passes through the conveyor gear 9 on the same horizontal line, and a motor is connected to the drive shaft 10.

[0037] Specifically, see Figure 1-5 The second support frame 2a is provided with limit frames 11 on both sides, and the limit frames 11 are provided with limit plates 12.

[0038] This invention provides an integrated forming machine for conveying and bending the main reinforcing bars of tunnel segments. A forming mechanism is installed at the rear end of the reinforcing bar conveying mechanism, and secondary bending devices are installed on both sides of the forming mechanism. When it is necessary to bend the reinforcing bars into an arc shape, the reinforcing bars are placed in batches onto a conveyor chain. The reinforcing bars are conveyed to a feeding unit via the conveyor chain. A stepped movable plate in the feeding unit, driven by a linear motor, sequentially conveys the reinforcing bars upwards. A guide plate conveys the reinforcing bars to a clamping unit. A driving cylinder pulls a moving block, thereby causing a lifting block to move downwards, which in turn causes a rotating ear to rotate. This causes the rotating plate to abut against the clamping block at the center of the reinforcing bar, completing the center positioning of the reinforcing bar. The two sides of the reinforcing bar are then positioned... Between the limiting rollers, a servo motor drives a lead screw to rotate, thereby moving a moving plate to bend the reinforcing bar along an arc-shaped forming groove to form the main rib. To produce reinforcing bars suitable for other applications, the bent main rib is subjected to a secondary bend. The secondary bending device moves along the horizontal and vertical linear motors to both sides of the main rib, clamping both sides of the main rib between the forming roller and the bending roller. The rotary motor rotates to perform a secondary bend on the bent main rib. This structure realizes integrated production of conveying, bending, and secondary bending. It can produce arc-shaped main ribs and perform secondary bending on arc-shaped main ribs according to requirements, greatly improving the production efficiency and quality of main ribs.

[0039] Therefore, this embodiment has the following advantages compared to the prior art:

[0040] A new integrated forming machine for conveying and bending the main reinforcement of tunnel tunnel segments solves the current problem that the main reinforcement of tunnel tunnel segments needs to be bent into an arc shape and then conveyed to the welding station to be welded together with the stirrups. For some scenarios, the reinforcement cage needs to be bent a second time and then welded together with the arc reinforcement to form an arc reinforcement hoop. However, currently, whether it is bending the reinforcement or bending it a second time, it is necessary to manually convey and bend it. Moreover, both bending into an arc shape and bending a second time require manual conveying to different processing positions, which greatly affects the production efficiency. Example 2:

[0041] See Figure 1-5The figure shows an integrated forming machine for conveying and bending the main reinforcement of tunnel segments according to Embodiment 2 of the present invention. This embodiment further improves upon the above embodiments by making the following technical solutions: The feeding unit 3 is connected to the tail of the conveying unit 2. The feeding unit 3 includes a third support frame 3a, a stepped movable plate 3b, and a stepped fixed plate 3c. The stepped fixed plate 3c is fixedly connected to the third support frame 3a. Several vertically arranged linear motors 13 are arranged on the third support frame 3a. Several stepped movable plates 3b are connected to a moving column 14. Several slide rails 15 are arranged on the moving column 14, and the slide rails 15 are slidably connected to the linear motors 13. Several stepped fixed plates 3c are connected by a fixed shaft 36. This achieves sequential conveying of the reinforcing bars, allowing the conveyed reinforcing bars to be bent sequentially, resulting in orderly and stable production with high efficiency. Example 3:

[0042] See Figure 1-5 The figure shows an integrated forming machine for conveying and bending the main reinforcement of a tunnel segment according to Embodiment 3 of the present invention. Based on the above embodiments, this embodiment further improves upon the following technical solution: A plurality of guide plates 16 are provided on the fixed shaft 36, and a plurality of stepped fixed plates 3c and a plurality of stepped movable plates 3b are arranged in a cross pattern. The reinforcing bars are conveyed upwards step by step along the stepped fixed plates via the stepped movable plates. Example 4:

[0043] See Figure 1-5 The figure shows an integrated forming machine for conveying and bending the main reinforcement of a tunnel segment according to Embodiment 3 of the present invention. Based on the above embodiments, this embodiment further improves upon the following technical solution: An arc-shaped forming groove 17 is provided on the mounting plate 421. This allows the reinforcement to be bent along the arc-shaped forming groove, ensuring the standardization of the bent section. Example 5:

[0044] See Figure 1-5The figure shows an integrated forming machine for conveying and bending the main reinforcement of tunnel segments provided in Embodiment 3 of the present invention. Based on the above embodiments, this embodiment further improves upon the following technical solutions: The mounting plate 421 is provided with a mounting groove 18. The clamping unit 41 includes a positioning plate 411, a rotating plate 412, and a clamping block 413. The positioning plate 411 is fixed on the mounting plate 421. The rotating plate 412 is provided with a rotating ear 19. The positioning plate 411 is provided with a lifting block 20. The rotating ear 19 is rotatably connected to the lifting block 20 and the rotating plate 412 on both sides. The bottom of the mounting plate 421 is provided with a connecting bracket 21. The connecting bracket 21 is provided with a driving cylinder 22. The driving cylinder 22 is provided with a moving block 23. The lifting block 20 passes through the mounting groove 18 and is rotatably connected to the moving block 23. Example 6:

[0045] See Figure 1-5 The figure shows an integrated forming machine for conveying and bending the main reinforcement of a tunnel segment provided in Embodiment 3 of the present invention. Based on the above embodiments, this embodiment further improves upon the following technical solutions: a secondary bending device 24 is also provided, located on both sides of the mounting plate 421. The secondary bending device 24 includes a fourth support frame 241, a rotary motor 242, and a forming roller 243. A horizontal linear motor 28 is provided on the fourth support frame 241. A connecting frame 29 is slidably connected to the horizontal linear motor 28 on its outer wall, and a vertical linear motor 30 is slidably connected to the inner wall of the connecting frame 29. The vertical linear motor 30 is connected to the forming frame 31. The rotary motor 242 is located inside the forming frame 31. A forming plate 32 is provided at the bottom of the forming frame 31. An arc-shaped groove 33 is provided on the forming plate 32. A cam 34 is provided on the rotary motor 242. A bending roller 35 is provided on the cam 34. The bending roller 35 is located inside the arc-shaped groove 33. The forming roller 243 is connected to the forming plate 32.

[0046] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A shield tunnel segment main reinforcement conveying and bending integrated forming machine, characterized in that, include: A steel bar conveying mechanism (1); which includes a material conveying unit (2) and a material feeding unit (3); The forming mechanism (4) is located behind the feeding unit (3). The forming mechanism (4) is mounted on the first support frame (5). The forming mechanism (4) includes a clamping unit (41) and a bending unit (42). The clamping unit (41) is mounted on the bending unit (42). The bending unit (42) includes a mounting plate (421), a servo motor (422), a lead screw (423), a moving plate (424), and limiting rollers (425). The servo motor (422) is connected to the mounting plate (421). The lead screw (423) is connected to the servo motor (422). The moving plate (424) is sleeved on the lead screw (423). Several limiting rollers (425) are located on the moving plate (424). The two sides of the reinforcing bar (6) are located between several limiting rollers (425). The middle position of the reinforcing bar (6) is positioned on the clamping unit (41). The mounting plate (421) Guide rails (7) are provided on both sides of the bottom, and the moving plate (424) is slidably connected to the guide rails (7); the mounting plate (421) is provided with a mounting groove (18), the clamping unit (41) includes a positioning plate (411), a rotating plate (412) and a clamping block (413), the positioning plate (411) is fixed on the mounting plate (421), the rotating plate (412) is provided with a rotating ear (19), the positioning plate (411) is provided with a lifting block (20), the rotating ear (19) is rotatably connected to the lifting block (20) and the rotating plate (412) on both sides respectively, the mounting plate (421) is provided with a connecting bracket (21), the connecting bracket (21) is provided with a driving cylinder (22), the driving cylinder (22) is provided with a moving block (23), the lifting block (20) passes through the mounting groove (18) and is rotatably connected to the moving block (23).

2. The shield tunnel segment main reinforcement conveying and bending integrated forming machine according to claim 1, characterized in that, The material transfer unit (2) includes a second support frame (2a) and a conveyor chain (2b). A connecting plate (8) is provided on the second support frame (2a), and a conveyor gear (9) is provided on the connecting plate (8). The conveyor chain (2b) is sleeved on the conveyor gear (9). The drive shaft (10) passes through the conveyor gear (9) on the same horizontal line, and the motor is connected to the drive shaft (10).

3. The shield tunnel segment main reinforcement conveying and bending integrated forming machine according to claim 2, characterized in that, The second support frame (2a) is provided with limit frames (11) on both sides, and the limit frames (11) are provided with limit plates (12).

4. The shield tunnel segment main reinforcement conveying and bending integrated forming machine according to claim 3, characterized in that, The feeding unit (3) is connected to the tail of the material transfer unit (2). The feeding unit (3) includes a third support frame (3a), a stepped movable plate (3b) and a stepped fixed plate (3c). The stepped fixed plate (3c) is fixedly connected to the third support frame (3a). The third support frame (3a) is provided with a number of vertically arranged linear motors (13). The stepped movable plates (3b) are connected to the moving column (14). The moving column (14) is provided with a number of slide rails (15). The slide rails (15) are slidably connected to the linear motors (13). The stepped fixed plates (3c) are connected by a fixed shaft (36).

5. The shield tunnel segment main reinforcement conveying and bending integrated forming machine according to claim 4, characterized in that, The fixed shaft (36) is provided with a number of guide plates (16), and a number of stepped fixed plates (3c) and a number of stepped movable plates (3b) are arranged in a cross pattern.

6. The shield tunnel segment main reinforcement conveying and bending integrated forming machine according to claim 1, characterized in that, The mounting plate (421) is provided with an arc-shaped groove (17).

7. The shield tunnel segment main reinforcement conveying and bending integrated forming machine according to claim 1, characterized in that, A secondary bending device (24) is also provided, located on both sides of the mounting plate (421). The secondary bending device (24) includes a fourth support frame (241), a rotary motor (242), and a forming roller (243). A horizontal linear motor (28) is provided on the fourth support frame (241). The outer wall of the connecting frame (29) is slidably connected to the horizontal linear motor (28), and the inner wall of the connecting frame (29) is slidably connected to the vertical linear motor (30). The rotary motor (242) is located inside the forming frame (31) and connected to the forming frame (31). A forming plate (32) is provided at the bottom of the forming frame (31). An arc groove (33) is provided on the forming plate (32). A cam (34) is provided on the rotary motor (242). A bending roller (35) is provided on the cam (34). The bending roller (35) is located inside the arc groove (33). The forming roller (243) is connected to the forming plate (32).

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