A beading apparatus for free bend pipe production and method of use thereof

Abstract

The application relates to a bending device for free bending pipe welding preparation and a use method thereof, and belongs to the technical field of welded pipe manufacturing. The bending device comprises a transversely arranged conveying roller way, the conveying roller way is a lifting driving roller way, the conveying roller way comprises a plurality of conveying roller way units arranged along the transverse direction, a rotating table is arranged on the right side of the conveying roller way, a row of conveying roller way units are arranged on the rotating table along the transverse direction, a bending machine is arranged on the rear side of the conveying roller way, a walking mechanism is arranged at the lower end of the frame of the bending machine, an upper die device and a lower die device are arranged on the frame, a row of support frames and two material pushing devices are fixedly arranged at the front end of the frame, the support frames, the material pushing devices and the conveying roller way units are staggered, and slidable material pushing trolleys are arranged on the upper parts of the material pushing devices through horizontal conveying mechanisms. The problems that the plate edge bending width of a large wall thickness product is small and the production line has too large installation capacity in the current welded pipe preparation process are solved.

Description

Technical Field

[0001] This invention belongs to the field of welded pipe manufacturing technology, specifically relating to a bending device for preparing freely bending welded pipes and its usage method. Background Technology

[0002] like Figure 1 , 2 As shown in Figure 3, edge bending is one of the most critical processes in the production of welded pipes. Existing edge bending equipment consists of an inlet-side conveyor roller conveyor 7 and an outlet-side conveyor roller conveyor 9 arranged in the same direction. A C-shaped press 8 is installed between the inlet-side conveyor roller conveyor 7 and the outlet-side conveyor roller conveyor 9. An inlet-side lifting conveyor roller conveyor 71 is installed at the edge of the inlet-side conveyor roller conveyor 7 that connects to the C-shaped press 8, and an outlet-side lifting conveyor roller conveyor 91 is installed at the edge of the outlet-side conveyor roller conveyor 9 that connects to the C-shaped press 8. The C-shaped press 8 consists of a first frame 81, a first lower die 82, a base 83, a clamping beam 84, a first upper die 85, a lower die moving device 86, and a follow-up material support device 87.

[0003] The working principle of the plate edge bending method is as follows: After milling, the steel plate is fed into the C-shaped press 8 between the first upper die 85 and the first lower die 82 via the inlet side conveyor roller 7. Under the pressure of the first lower die 82, the plate edge is brought into contact with the first upper die 85, and the material undergoes plastic deformation, thereby obtaining a plate edge curvature radius similar to that of the finished steel pipe. The curves of the first upper die 85 and the first lower die 82 are involutes. By changing and adjusting the relative positions of the dies, all specifications can be covered. Bending is performed simultaneously on both sides. Typically, the length of the steel plate is several times the length of the bending die, so the conveying and bending of the steel plate is step-by-step.

[0004] The specific action procedure is as follows:

[0005] 1. Feeding: The steel plate enters the inlet side conveyor roller 7 from the upstream milling exit roller conveyor. The inlet side conveyor roller 7 drives the steel plate forward, with the center roller providing lateral guidance. Through inductive switch detection and CNC system control, the steel plate stops at the ready position.

[0006] 2. Steel plate centering: The centering rollers mechanically clamp the steel plate to ensure that the center of the steel plate is aligned with the center of the C-shaped press 8.

[0007] 3. Feeding: The inlet-side conveyor roller 7 drives the steel plate forward, with the center roller providing lateral guidance. Through encoder detection and CNC system control, the steel plate stops at the position of the first bending edge.

[0008] 4. Steel plate clamping: The first lower mold 82 rises rapidly, and the clamping beam 84 follows the first lower mold 82 and rises rapidly to clamp the steel plate.

[0009] The follow-up material support device 87 and the inlet-side lifting conveyor roller 71 and outlet-side lifting conveyor roller 91 located before and after the bending machine rise and support the steel plate during the bending process. During the rising of the first lower die 82, the centering roller is relaxed.

[0010] 5. Bending edge: The first lower mold 82 rises at the working speed, the first upper mold 85 and the first lower mold 82 close and hold pressure, and the bending edge is formed.

[0011] 6. Return stroke: The first lower mold 82, clamping beam 84, follow-up material support device 87, and the front and rear inlet side lifting conveyor rollers 71 and outlet side lifting conveyor rollers 91 return quickly.

[0012] 7. Step-by-step bending: The inlet side conveyor roller 7 feeds the material and repeats the actions of steps 3 to 6 to complete the bending of the entire steel plate.

[0013] 8. Discharge: The bent steel plate enters the outlet side conveyor roller conveyor 9.

[0014] However, the existing bending equipment and methods mentioned above have a maximum bending width of no more than 150mm and a minimum pipe diameter of more than Φ325mm, making it impossible to bend the plate edge with a larger bending width. At the same time, the number of molds required is large and the structure is relatively complex. The lateral force during bending is large, which reduces the effective pressing force and wastes energy. Therefore, they are only suitable for the mass production of products with small to medium wall thickness, and cannot be used for the mass production of large wall thickness products. Summary of the Invention

[0015] This invention overcomes the shortcomings of the prior art and proposes a bending device and its usage method for the preparation of freely bending welded pipes; it solves the problem that the bending width of large wall thickness products is small and the production line installation capacity is too large in the current welded pipe preparation process.

[0016] To achieve the above objectives, the present invention is implemented through the following technical solution.

[0017] A bending device for preparing freely bent welded pipes includes a transversely arranged conveyor roller, which is a lifting active roller, and includes multiple conveyor roller units arranged transversely. A rotary table is provided on the right side of the conveyor roller, and a row of conveyor roller units is arranged transversely on the rotary table. A bending machine is provided on the rear side of the conveyor roller, and a traveling mechanism is provided at the lower end of the frame of the bending machine. An upper die device and a lower die device are provided on the frame. A row of support frames and two pushing devices are fixedly provided at the front end of the frame. The support frames, pushing devices, and conveyor roller units are arranged alternately. A sliding pushing trolley is provided on the upper part of the pushing device through a horizontal conveying mechanism.

[0018] Furthermore, a conveyor roller is provided at the upper end of the conveyor roller conveyor unit. The conveyor roller extends horizontally along the longitudinal direction and is fixedly connected to the output shaft of the conveyor motor. The conveyor motor drives the conveyor roller to rotate.

[0019] Furthermore, the center of the rotary table is fixedly connected to the output shaft of the rotary motor, and the rotary motor drives the rotary table to rotate horizontally.

[0020] Furthermore, a row of individual conveyor rollers on the rotary table are connected to a row of individual conveyor rollers on the conveyor track.

[0021] Furthermore, the frame of the bending machine is an integrally welded C-shaped structure with a C-shaped opening at its front end. The upper mold device and the lower mold device are respectively arranged on the upper and lower sides of the C-shaped opening of the frame. The upper mold device includes an upper mold, and the lower mold device includes a lower mold and a power unit. The upper mold is located above the lower mold and is fixed on the frame. The lower mold is vertically raised and lowered under the drive of the power unit.

[0022] Furthermore, a row of support frames is set at the front end of the frame on the front side of the C-shaped opening. The support frames are arranged horizontally, and the support frames themselves are set horizontally in the longitudinal direction.

[0023] Furthermore, the two pusher devices are located at the front end face of the frame on the front side of the C-shaped opening. The two pusher devices are symmetrically arranged along the left and right sides, and the pusher devices themselves are arranged to extend horizontally along the longitudinal direction.

[0024] Furthermore, the pushing device includes a pushing frame, a pushing trolley, and a horizontal conveying mechanism. The pushing frame extends horizontally along the longitudinal direction, and the pushing trolley is slidably mounted on the pushing frame. The pushing trolley moves longitudinally back and forth on the pushing frame under the action of the horizontal conveying mechanism, and the pushing trolley is equipped with clamps.

[0025] Furthermore, the horizontal transmission mechanism is a servo-driven rack and pinion mechanism, and the clamp is a retractable hydraulic clamping mechanism.

[0026] Furthermore, a method of using a bending device for preparing freely bent welded pipes includes the following steps:

[0027] Step 1: Steel Plate Preparation

[0028] After milling, the steel plate is transported to the corresponding area of ​​the bending machine via a conveyor roller. The conveyor roller is controlled to descend, and the steel plate is placed on the support frame.

[0029] Step 2: Longitudinal feed

[0030] The feeding device controls the feeding trolley to move forward and feed the steel plate into the upper and lower dies of the bending machine according to the set process parameters;

[0031] Step 3: Bending the edge

[0032] The lower die rises, and the relative position of the lower die and the upper die is precisely controlled to bend the edge of the plate to a radius of curvature similar to that of the finished steel pipe, and then it returns quickly. The bending machine moves step by step along the length of the steel plate, repeating the above bending action until the entire length of the steel plate is bent.

[0033] Step 4: Increase the width of the bend.

[0034] When it is necessary to increase the bending width, the pushing device pushes the steel plate longitudinally into the bending machine for a certain length according to the set process parameters. The bending machine moves in the opposite direction along the length of the steel plate, repeating the above bending action until the full length of the steel plate is bent.

[0035] Step 5: Prepare the other side bend

[0036] After the bending is completed, the clamps on the pusher trolley clamp the bent steel plate on one side. The pusher device controls the pusher trolley to move backward and drag the bent steel plate back to the support frame. The conveyor rollers rise to lift the steel plate and transport the bent steel plate to the rotary table. The rotary table rotates 180 degrees and the conveyor rollers reverse to transfer the steel plate back to the bending position. The transverse center of the steel plate is aligned with the transverse center of the two pusher devices. The conveyor rollers descend and the steel plate is placed on the support frame.

[0037] Step 6: Longitudinal Feed

[0038] The pushing device feeds the steel plate into the upper and lower dies of the bending machine according to the set process parameters by moving the pushing trolley forward.

[0039] Step 7: Bend the other side

[0040] Repeat step three above to bend the other side of the steel plate;

[0041] Step 8: Discharging

[0042] After the bending is completed, the pushing trolley of the pushing device clamps the bent steel plate and drags it back to the support frame at the center of the conveyor roller. The conveyor roller rises to lift the steel plate and then transports the bent steel plate to the next process through the conveyor roller.

[0043] The beneficial effects of this invention compared to the prior art are as follows:

[0044] (1) The edge of the steel plate can be bent multiple times to achieve a greater bending width, which can reach more than 300mm;

[0045] (2) Special mold curve design, fewer tools required, one set of molds can meet the production of the whole series of products, the steel plate is reasonably stressed, the lateral force of the pressing force during bending is small, and the effective utilization rate is high;

[0046] (3) Applicable to edge bending of small batches, multiple varieties and specifications of products. Attached Figure Description

[0047] The present invention will now be described in further detail with reference to the accompanying drawings:

[0048] Figure 1 This is a top view of existing technology;

[0049] Figure 2 yes Figure 1 AA section view in the middle;

[0050] Figure 3 This is a schematic diagram of the existing technology for bending steel plates.

[0051] Figure 4 This is a top view of the entire invention;

[0052] Figure 5 This is a top view of the present invention when bending the edge of a steel plate;

[0053] Figure 6 yes Figure 4 BB section view in the middle;

[0054] Figure 7 This is a schematic diagram of the bending steps of the steel plate according to the present invention;

[0055] Among them, 1 is the conveyor roller conveyor, 2 is the rotary table, 3 is the bending machine, 31 is the frame, 32 is the traveling mechanism, 33 is the upper mold, 34 is the lower mold, 35 is the power unit, 4 is the support frame, 5 is the pushing device, 51 is the pushing frame, 52 is the pushing trolley, 6 is the steel plate, 7 is the inlet side conveyor roller conveyor, 71 is the inlet side lifting conveyor roller conveyor, 8 is the C-shaped press, 81 is the first frame, 82 is the first lower mold, 83 is the base, 84 is the clamping beam, 85 is the first upper mold, 86 is the lower mold moving device, 87 is the follow-up material support device, 9 is the outlet side conveyor roller conveyor, and 91 is the outlet side lifting conveyor roller conveyor. Detailed Implementation

[0056] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of this invention are described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0057] like Figure 4 As shown in Figure 7, the present invention provides a bending device for preparing freely bent welded pipes, including a conveyor roller 1, a rotary table 2, a support frame 4, a pushing device 5, and a bending machine 3.

[0058] The conveyor roller conveyor 1 is a lifting and active roller conveyor, comprising multiple individual conveyor roller conveyors arranged laterally. A gap is provided between any two adjacent conveyor roller conveyors, and all conveyor roller conveyors move vertically and vertically synchronously. A conveyor roller is mounted at the upper end of each individual conveyor roller conveyor, extending horizontally along the longitudinal direction. The conveyor roller is fixedly connected to the output shaft of a conveyor motor, which drives the conveyor roller to rotate. The synchronous rotation of the conveyor rollers in all individual conveyor roller conveyors thus drives the steel plate 6 at its upper end to be conveyed laterally.

[0059] A horizontal rotary table 2 is provided on the right side of the conveyor roller conveyor 1. The center of the rotary table 2 is fixedly connected to the output shaft of a rotary motor, which drives the rotary table 2 to rotate horizontally. A row of conveyor roller conveyor units is arranged horizontally on the rotary table 2. The row of conveyor roller conveyor units on the rotary table 2 is connected to the row of conveyor roller conveyor units on the conveyor roller conveyor 1, so that the steel plate 6 can be transferred back and forth between the rotary table 2 and the conveyor roller conveyor 1.

[0060] A bending machine 3 is installed on the rear side of the conveyor roller conveyor 1. The bending machine 3 includes a frame 31, and a set of traveling mechanisms 32 are respectively installed at the four corners of the lower end of the frame 31. The traveling mechanisms 32 are driven by servo motors and drive the bending machine 3 to reciprocate laterally. The frame 31 is an integrally welded C-shaped structure with a C-shaped opening at its front end to withstand bending forces. An upper mold device and a lower mold device are respectively installed on the upper and lower sides of the C-shaped opening of the frame 31. The upper mold device includes an upper mold 33, and the lower mold device includes a lower mold 34 and a power unit 35. The upper mold 33 is located above the lower mold 34 and is fixed to the frame 31. The lower mold 34 is vertically raised and lowered under the drive of the power unit 35, which is driven by a hydraulic servo to provide the power source for the rise of the lower mold 34.

[0061] A row of support frames 4 is fixedly installed at the front end face of the frame 31 on the front side of the C-shaped opening. The support frames 4 are arranged horizontally along the transverse direction and are themselves arranged horizontally along the longitudinal direction. There is a gap between any two adjacent support frames 4. The row of conveyor rollers of the conveyor roller conveyor 1 and the row of support frames 4 are staggered in the transverse direction, that is, when the row of conveyor rollers of the conveyor roller conveyor 1 rises and falls, it passes through the row of support frames 4 without interfering with each other.

[0062] Two parallel pushing devices 5 are fixedly installed at the front end face of the frame 31 on the front side of the C-shaped opening. The two pushing devices 5 are symmetrically arranged along the left and right sides, and the pushing devices 5 themselves extend horizontally in the longitudinal direction. The two pushing devices 5 are staggered with a row of conveyor rollers 1 in the transverse direction, that is, when a row of conveyor rollers 1 moves up and down, it passes through the two pushing devices 5 without interfering with each other. The pushing device 5 includes a pushing frame 51, a pushing trolley 52, and a horizontal conveying mechanism. The pushing frame 51 extends horizontally in the longitudinal direction, and the pushing trolley 52 is slidably arranged on the pushing frame 51. The pushing trolley 52 moves longitudinally back and forth on the pushing frame 51 under the action of the horizontal conveying mechanism. The pushing trolley 52 is equipped with a clamp, which is a retractable hydraulic clamping mechanism. The horizontal transmission mechanism is a servo-driven gear and rack mechanism, which can accurately position the components.

[0063] When performing the bending operation, the steel plate 6 is first precisely positioned by the pushing device 5, and the power unit 35 drives the lower mold 34 to rise. After rising, the lower mold 34 cooperates with the fixed upper mold 33 to bend the edge of the steel plate 6 to the required curvature. Then the lower mold 34 quickly returns to complete one bending operation. Next, the traveling mechanism 32 drives the bending machine 3 to step along the length direction (lateral direction) of the steel plate 6 to perform a second bending operation on the edge of the steel plate 6. This process is repeated until all the edges of the steel plate 6 are bent.

[0064] The above-mentioned method of using the bending equipment for preparing freely bent welded pipes is as follows:

[0065] Step 1: Preparation of steel plate 6

[0066] After milling, the steel plate 6 is conveyed to the corresponding area of ​​the bending machine 3 via the conveyor roller 1, and the transverse center of the steel plate 6 is aligned with the transverse center of the two pushing devices 5; the conveyor roller 1 is controlled to descend, and the steel plate 6 is placed on the support frame 4.

[0067] Step 2: Longitudinal feed

[0068] The pushing device 5 fixes the front edge of the steel plate 6 through the pushing trolley 52, and then the pushing trolley 52 moves forward to send the steel plate 6 into the space between the upper mold 33 and the lower mold 34 of the bending machine 3 according to the set process parameters.

[0069] Step 3: Bending the edge

[0070] The lower mold 34 rises, precisely controlling the relative position of the lower mold 34 and the upper mold 33, bending the plate edge to a curvature radius close to that of the finished steel pipe, and then quickly returning.

[0071] Normally, the length of the steel plate 6 is several times the length of the bending die. The bending machine 3 moves in a stepping motion along the length direction (lateral direction) of the steel plate 6, repeating the above bending action until the steel plate 6 is bent along its entire length.

[0072] Step 4: Increase the width of the bend.

[0073] When it is necessary to increase the bending width, the pushing device 5 pushes the steel plate 6 longitudinally into the bending machine 3 again according to the set process parameters for a certain length. The bending machine 3 moves in the opposite direction (lateral) along the length of the steel plate 6, repeating the above bending action until the steel plate 6 is bent along its full length.

[0074] In this way, the bending width of steel plate 6 can be further increased.

[0075] Step 5: Prepare the other side bend

[0076] After the bending is completed, the clamps on the pusher trolley 52 clamp the bent steel plate 6 on one side. The pusher device 5 controls the pusher trolley 52 to move backward and drag the bent steel plate 6 back to the support frame 4. The conveyor roller 1 rises to lift the steel plate 6 and conveys the bent steel plate 6 to the rotary table 2 through the conveyor roller 1. The rotary table 2 rotates 180 degrees and the conveyor roller 1 reverses to transfer the steel plate 6 back to the bending position. The transverse center of the steel plate 6 is aligned with the transverse center of the two pusher devices 5. The conveyor roller 1 descends and the steel plate 6 is placed on the support frame 4.

[0077] Step 6: Longitudinal Feed

[0078] The pushing device 5 advances through the pushing trolley 52 to feed the steel plate 6 into the space between the upper mold 33 and the lower mold 34 of the bending machine 3 according to the set process parameters.

[0079] Step 7: Bend the other side

[0080] Repeat step 3 above to bend the other side of steel plate 6.

[0081] Step 8: Discharging

[0082] After the bending is completed, the pushing trolley 52 of the pushing device 5 moves backward to drag the bent steel plate 6 back to the support frame 4 at the center of the conveying roller 1. The conveying roller 1 rises to lift the steel plate 6 and conveys the bent steel plate 6 to the next process through the conveying roller 1.

[0083] The shape change of steel plate 6 during bending is as follows: Figure 7 As shown, taking a single side bending in 3 stages as an example, the first bending is to one side of the steel plate 6 with a width of W0, and the bending width is B1. The second bending is to the bending width of B2, and the third bending is to the bending width of B3. The other side is the same, bending in 3 stages, with bending widths of B1, B2 and B3 respectively. Finally, the two sides of the plate are bent into a shape with a width of B3.

[0084] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A bending device for preparing freely bent welded pipes, characterized in that: The system includes a transversely arranged conveyor roller (1), which is a lifting active roller conveyor. The conveyor roller (1) includes multiple conveyor roller units arranged in a transverse direction. A rotary table (2) is provided on the right side of the conveyor roller (1), and a row of conveyor roller units is arranged in a transverse direction on the rotary table (2). A bending machine (3) is provided on the rear side of the conveyor roller (1). A traveling mechanism (32) is provided at the lower end of the frame (31) of the bending machine (3). An upper mold device and a lower mold device are provided on the frame (31). A row of support frames (4) and two pushing devices (5) are fixedly provided at the front end of the frame (31). The support frames (4), pushing devices (5), and conveyor roller units are arranged alternately. A sliding pushing trolley (52) is provided on the upper part of the pushing device (5) through a horizontal conveying mechanism. A row of conveyor roller units on the rotary table (2) is connected to a row of conveyor roller units on the conveyor roller (1). When it is necessary to increase the bending width, the pushing device (5) pushes the steel plate (6) longitudinally into the bending machine (3) for a certain length according to the set process parameters. The bending machine (3) moves in the opposite direction along the length of the steel plate (6) and repeats the above bending action until the steel plate (6) is bent along its entire length.

2. The bending device for preparing freely bent welded pipes according to claim 1, characterized in that: The upper end of the conveyor roller conveyor is equipped with a conveyor roller, which extends horizontally along the longitudinal direction. The conveyor roller is fixedly connected to the output shaft of the conveyor motor, and the conveyor motor drives the conveyor roller to rotate.

3. The bending device for preparing freely bent welded pipes according to claim 1, characterized in that: The center of the rotary radio station is fixedly connected to the output shaft of the rotary motor, and the rotary motor drives the rotary table (2) to rotate horizontally.

4. The bending device for preparing freely bent welded pipes according to claim 1, characterized in that: The frame (31) of the bending machine (3) is an integrally welded C-shaped structure with a C-shaped opening at its front end. The upper mold device and the lower mold device are respectively provided on the upper and lower sides of the C-shaped opening of the frame (31). The upper mold device includes an upper mold (33), and the lower mold device includes a lower mold (34) and a power unit (35). The upper mold (33) is located above the lower mold (34). The upper mold (33) is fixed on the frame (31), and the lower mold (34) is vertically lifted and lowered under the drive of the power unit (35).

5. A bending device for preparing freely bent welded pipes according to claim 4, characterized in that: A row of support frames (4) is set at the front end of the frame (31) on the front side of the C-shaped opening. The support frames (4) are arranged in a horizontal direction and are themselves arranged horizontally in the longitudinal direction.

6. The bending device for preparing freely bent welded pipes according to claim 4, characterized in that: The two pusher devices (5) are located at the front end of the frame (31) on the front side of the C-shaped opening. The two pusher devices (5) are symmetrically arranged along the left and right sides, and the pusher devices (5) themselves are arranged horizontally along the longitudinal direction.

7. A bending device for preparing freely bent welded pipes according to claim 6, characterized in that: The pushing device (5) includes a pushing frame (51), a pushing trolley (52), and a horizontal conveying mechanism. The pushing frame (51) extends horizontally along the longitudinal direction. The pushing trolley (52) is slidably arranged on the pushing frame (51). The pushing trolley (52) moves longitudinally back and forth on the pushing frame (51) under the action of the horizontal conveying mechanism. The pushing trolley (52) is equipped with clamps.

8. A bending device for preparing freely bent welded pipes according to claim 7, characterized in that: The horizontal transmission mechanism is a servo-driven rack and pinion mechanism, and the clamp is a retractable hydraulic clamping mechanism.

9. A method of using a bending device for preparing freely bent welded pipes according to any one of claims 1-8, characterized in that, Includes the following steps, Step 1: Steel plate (6) preparation After milling, the steel plate (6) is transported to the corresponding area of ​​the bending machine (3) via the conveyor roller (1). The conveyor roller (1) is controlled to descend and the steel plate (6) is placed on the support frame (4). Step 2: Longitudinal feed The pushing device (5) controls the pushing trolley (52) to move forward and send the steel plate (6) into the upper mold (33) and lower mold (34) of the bending machine (3) according to the set process parameters; Step 3: Bending the edge The lower mold (34) rises, and the relative position of the lower mold (34) and the upper mold (33) is precisely controlled to bend the edge of the plate to a radius of curvature similar to that of the finished steel pipe, and then the plate returns quickly. The bending machine (3) moves step by step along the length of the steel plate (6) and repeats the above bending action until the steel plate (6) is bent along its entire length. Step 4: Increase the width of the bend. When it is necessary to increase the bending width, the pushing device (5) pushes the steel plate (6) longitudinally into the bending machine (3) for a certain length according to the set process parameters. The bending machine (3) moves in the opposite direction along the length of the steel plate (6) and repeats the above bending action until the steel plate (6) is bent along its entire length. Step 5: Prepare the other side bend After the bending is completed, the clamps on the pusher trolley (52) clamp the bent steel plate (6) on one side. The pusher device (5) controls the pusher trolley (52) to move backward and drag the bent steel plate (6) back to the support frame (4). The conveyor roller (1) rises to lift the steel plate (6) and conveys the bent steel plate (6) to the rotary table (2) through the conveyor roller (1). The rotary table (2) rotates (180) degrees and the conveyor roller (1) reverses to transfer the steel plate (6) back to the bending position. The transverse center of the steel plate (6) is aligned with the transverse center of the two pusher devices (5). The conveyor roller (1) descends and the steel plate (6) is placed on the support frame (4). Step 6: Longitudinal Feed The pushing device (5) feeds the steel plate (6) into the upper mold (33) and lower mold (34) of the bending machine (3) according to the set process parameters by pushing the trolley (52) forward; Step 7: Bend the other side Repeat step 3 above to bend the other side of the steel plate (6); Step 8: Discharging After the bending is completed, the pusher trolley (52) of the pusher device (5) clamps the bent steel plate (6) and moves backward, dragging the bent steel plate (6) back to the support frame (4) at the center of the conveyor roller (1). The conveyor roller (1) rises to lift the steel plate (6) and conveys the bent steel plate (6) to the next process through the conveyor roller (1).

Images