Steel bar multi-section bending machine and steel bar multi-section bending method

Abstract

The application discloses a steel bar multi-section bending machine and a steel bar multi-section bending method. The steel bar multi-section bending machine comprises a bending arc device, a feeding device and a bending head device. The bending head device is arranged on the side of the bending arc device. The bending head device comprises a bending head main plate, a fixed guide column fixed on the bending head main plate, a movable guide column rotating around the fixed guide column and applying a bending force to the end of the bending arc completed steel bar, and a driving part driving the movable guide column to move. A guide groove for the movement of the movable guide column is formed on the bending head main plate. The fixed guide column and the movable guide column form a containing space for containing the bending arc completed steel bar. The application solves the technical problem that the steel bar bending in the prior art cannot easily realize bending of multiple bending sections with different diameters in the same direction or in the opposite direction, or needs to be moved to another bending machine to manufacture other bending sections.

Description

Technical Field

[0001] This invention relates to the field of mechanical technology, and in particular to a multi-segment bending machine and method for bending multi-segment reinforcing bars. Background Technology

[0002] A rebar bending machine is a type of rebar processing machinery. Its working mechanism is a horizontal working disc rotating on a vertical axis. The rebar is placed at the position shown by the dotted line in the diagram, with a support pin fixed to the machine tool. A center pin and a bending pin are mounted on the working disc. As the disc rotates, it bends the rebar. Conventional rebar bending machines can generally only bend a single section of rebar into one arc, making it difficult to bend multiple sections of different diameters in either the forward or reverse directions. Alternatively, they may require transferring the rebar to another bending machine for creating other curved sections, significantly increasing the machine's manufacturing cost. Summary of the Invention

[0003] To address the shortcomings of the existing technology, the present invention provides a multi-segment bending machine and a multi-segment bending method for reinforcing bars, which solves the technical problems in the prior art where it is difficult to bend multiple forward or reverse bending segments of different diameters, or where it is necessary to transfer the reinforcing bars to another bending machine to produce other bending segments.

[0004] In a first aspect, the present invention discloses a multi-segment bending machine for reinforcing bars, comprising:

[0005] The bending device includes a liftable operating platform, multiple stops that are detachably mounted on the operating platform in an arc shape for controlling the bending angle of the steel bar to be bent, and guide wheels that are slidably mounted on both sides of the operating platform for applying bending force to the steel bar to be bent.

[0006] The feeding device includes a horizontal transport mechanism for transporting the steel bar to be bent and a lifting mechanism for lifting the steel bar from the horizontal transport mechanism to the operating platform. The lifting mechanism is connected between the horizontal transport mechanism and the operating platform.

[0007] The bending device is disposed on the side of the bending device. The bending device includes a bending main board, a fixed guide post fixed on the bending main board, a movable guide post that rotates around the fixed guide post and applies bending force to the end of the bent steel bar, and a driving member that drives the movable guide post to move. The bending main board is provided with a guide groove for the movable guide post to move. An accommodating space for accommodating the bent steel bar is formed between the fixed guide post and the movable guide post.

[0008] The unloading device includes a side conveyor belt assembly for removing the bent reinforcing bars from the operating platform, the side conveyor belt assembly being slidably mounted on both sides of the bending device.

[0009] A further improvement of the multi-segment rebar bending machine of the present invention is that the bottom of the bending main board is provided with a bending frame, the bottom of the movable guide column is provided with a rotating disk, and the driving component is fixed on the bending frame and drives the rotating disk to rotate.

[0010] A further improvement of the multi-segment bending machine for reinforcing bars of the present invention is that the bending device further includes a centering device for controlling the bending inflection point of the reinforcing bar to be bent. The centering device includes a centering cylinder fixed on the bending frame and a centering baffle fixed to the front end of the centering cylinder and used to abut against the reinforcing bar to be bent.

[0011] A further improvement of the multi-segment bending machine for reinforcing bars of the present invention is that a rotating sleeve is rotatably fitted on the movable guide post, and the diameter of the rotating sleeve is adapted to the width of the guide groove.

[0012] A further improvement of the multi-segment bending machine for reinforcing bars of the present invention is that the operating platform includes two half-splicing plates, a guide plate connecting the two half-splicing plates, and a hand-cranked screw module for controlling the two guide plates to move closer or further apart. The bottom of the operating platform is provided with an operating frame. The hand-cranked screw module includes a moving rail fixed to the operating frame and a moving block slidably installed on the moving rail. The bottom of the half-splicing plate is fixed to the moving block.

[0013] A further improvement of the multi-segment bending machine for reinforcing bars of the present invention is that the lifting mechanism includes an inclined plate for the reinforcing bar to be bent to slide onto the operating platform, and the operating platform is provided with at least two longitudinal limiting blocks for blocking the reinforcing bar to be bent from sliding down the inclined plate. The longitudinal limiting blocks are installed on the operating platform in a liftable manner, and the minimum height of the longitudinal limiting blocks is lower than the height of the operating platform.

[0014] A further improvement of the multi-segment bending machine for reinforcing bars of the present invention is that two pushers are installed on both sides of the operating platform for aligning the center of the reinforcing bar to be bent with the arc center of the plurality of stops, and the pushers correspond to the two ends of the reinforcing bar to be bent on the operating platform.

[0015] A further improvement of the multi-segment bending machine for reinforcing bars of the present invention is that the side conveyor belt assembly includes a side lifting frame, a side guide rail fixed on the side lifting frame, a side slider slidably mounted on the side guide rail, and a side conveyor belt mounted on the side slider. When the side lifting frame is raised to its highest position, the upper surface of the side conveyor belt is higher than the height of the stop block. When the side lifting frame is lowered to its lowest position, the upper surface of the side conveyor belt is lower than the height of the operating platform.

[0016] A further improvement of the multi-segment bending machine for reinforcing bars of the present invention is that the operating platform is provided with a middle conveyor belt assembly for removing the middle part of the bent reinforcing bar from the operating platform and parallel to the side conveyor belt assembly. The middle conveyor belt assembly includes a middle lifting frame, a middle guide rail fixed on the middle lifting frame, a middle slider slidably installed on the middle guide rail, and a middle conveyor belt installed on the middle slider. The operating platform has a notch on the side away from the feeding device for accommodating the middle guide rail.

[0017] Secondly, the present invention also provides a method for multi-segment bending of reinforcing bars using the multi-segment bending machine described above, comprising the following steps: a horizontal transport mechanism transports the reinforcing bar to be bent to a lifting mechanism until the reinforcing bar is located on the lifting mechanism; the lifting mechanism lifts the reinforcing bar until it falls onto the operating platform; force is applied to both sides of the reinforcing bar by sliding guide wheels, and multiple stops block the middle of the reinforcing bar, causing it to bend; the guide wheels return to their original positions; the operating platform lowers, causing the reinforcing bar to fall into the accommodating space between the fixed guide column and the movable guide column; the movable guide column is driven to move along the guide groove by a drive component, causing the reinforcing bar to be bent around the fixed guide column; the reinforcing bar returns to the movable guide column; the operating platform rises, lifting the bent reinforcing bar from the bending main plate; the bent reinforcing bar is removed from the operating platform by a side conveyor belt assembly.

[0018] Compared with existing technologies, the advantages of this invention are positive and significant. This invention solves the technical problems of existing technologies, such as the difficulty in bending multiple forward or reverse bending segments of different diameters, or the need to transfer the rebar to another bending machine for creating other bending segments, by using a bending device and a bending head device to automatically bend a single rebar in multiple segments. This invention enables fully automatic bending of rebar without manual operation, greatly improving the efficiency of rebar bending while saving on labor and other machine manufacturing costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the multi-segment bending machine for reinforcing bars according to the present invention.

[0021] Figure 2 This is a schematic diagram of the horizontal transport mechanism of the multi-segment rebar bending machine of the present invention.

[0022] Figure 3 This is a schematic diagram of the lifting mechanism of the multi-segment rebar bending machine of the present invention, in embodiment two. Figure 1 .

[0023] Figure 4 This is a schematic diagram of the lifting mechanism of the multi-segment rebar bending machine of the present invention, in embodiment two. Figure 2 .

[0024] Figure 5 This is a front view of Embodiment 2 of the lifting mechanism of the multi-segment rebar bending machine of the present invention.

[0025] Figure 6 for Figure 5 Sectional view along line AA.

[0026] Figure 7 This is a schematic diagram of the bending device and feeding device of the multi-segment rebar bending machine of the present invention.

[0027] Figure 8 This is a schematic diagram of the bending device structure of the multi-segment rebar bending machine of the present invention.

[0028] Figure 9 This is a schematic diagram of the hand-cranked screw module structure of the multi-segment rebar bending machine of the present invention.

[0029] Figure 10 This is a schematic diagram showing the installation position of the hand-cranked screw module of the multi-segment rebar bending machine of the present invention.

[0030] The components include: 1. Bending device; 101. Operating platform; 102. Guide wheel; 103. Longitudinal limit block; 104. Pushing component; 105. Stop block; 106. Middle lifting frame; 2. Lifting mechanism; 201. Fixed step plate; 202. Movable step plate; 203. Rotating shaft; 204. Eccentric wheel; 205. Driving component; 206. Slide rail; 207. Lifting frame body; 208. Inclined plate; 209. Sliding block; 210. Mounting rod; 211. Ear plate assembly; 3. Horizontal transport mechanism; 301. Conveyor chain; 302. Horizontal transport frame body; 4. Unloading device; 401. Side conveyor belt; 402. Side lifting frame; 403. Middle conveyor belt; 404. Middle lifting frame; 5. Collection rack; 6. Distribution box; 7. Rebar to be bent; 8. Elbow device; 801. Elbow main board; 802. Fixed guide post; 803. Movable guide post; 804. Guide groove; 805. Drive component; 806. Rotating sleeve; 807. Rotating disk; 808. Planetary reducer; 809. Centering cylinder; 810. Centering baffle; 811. Elbow frame; 9. Hand-cranked screw module; 901. Screw; 902. Hand crank wheel; 903. Bearing seat; 904. Pad; 905. Nut; 906. Nut seat. Detailed Implementation

[0031] 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.

[0032] like Figures 1-10 As shown, the present invention provides a multi-segment bending machine for reinforcing bars, comprising: a bending device 1, which includes a liftable operating platform 101, multiple stops 105 detachably mounted on the operating platform 101 in an arc shape for controlling the bending angle of the reinforcing bar 7 to be bent, and guide wheels 102 slidably mounted on both sides of the operating platform 101 for applying bending force to the reinforcing bar 7 to be bent; a feeding device, which includes a horizontal transport mechanism 3 for transporting the reinforcing bar 7 to be bent, and a lifting mechanism 2 for lifting the reinforcing bar 7 from the horizontal transport mechanism 3 onto the operating platform 101, the lifting mechanism 2 being connected between the horizontal transport mechanism 3 and the operating platform 101; and a bending device 8. The bending device 8, located on the side of the bending device 1, includes a bending main board 801, a fixed guide post 802 fixed on the bending main board 801, a movable guide post 803 that rotates around the fixed guide post 802 and applies bending force to the end of the bent steel bar, and a driving member 805 that drives the movable guide post 803 to move. The bending main board 801 has a guide groove 804 for the movable guide post 803 to move. A receiving space for the bent steel bar is formed between the fixed guide post 802 and the movable guide post 803. The unloading device 4 includes a side conveyor belt assembly for removing the bent steel bar from the operating platform 101. The side conveyor belt assembly is slidably installed on both sides of the bending device.

[0033] Specifically, such as Figure 1 and Figure 7 As shown, the operating platform 101 is equipped with a sliding groove for each stop 105 to slide and adjust its position. All sliding grooves are opened radially along the operating platform 101. The stop 105 slides in the sliding groove to adjust the curvature of the steel bar bending. A power distribution box 6 for supplying power to the entire machine is set next to the multi-segment steel bar bending machine. In this invention, the steel bar to be bent 7 is transported to the position of the lifting mechanism 2 by the horizontal transport mechanism 3. The lifting mechanism 2 lifts the steel bar to be bent 7 to the highest position. The steel bar to be bent 7 slides down onto the operating platform 101 under the action of gravity and is bent by the guide wheel 102. Then, the end bending operation is performed by the bending mechanism. The bent steel bar is transported to the collection rack 5 by the unloading device 4, thereby realizing the automatic feeding, bending, unloading and collection of steel bars. This realizes the automated operation of multi-segment steel bar bending, saves labor costs and reduces the safety risks of manual operation.

[0034] In the first embodiment of the lifting device, the lifting device 2 can use at least two sets of conveyor chains or conveyor belts to convey the steel bar 7 obliquely upwards. Multiple slots for accommodating the steel bar 7 to be bent are provided at intervals on the outer periphery of the conveyor chain or conveyor belt. The lowest end of the conveyor chain or conveyor belt is lower than the horizontal transport device, so that the steel bar 7 to be bent can fall from the horizontal transport device into the slots. The highest end of the conveyor chain or conveyor belt is set at the height of the operating platform. Thus, as the conveyor chain or conveyor belt rotates, the steel bar 7 to be bent can move from the lowest end to the highest end. Then, as the conveyor chain or conveyor belt continues to rotate, the steel bar 7 to be bent falls onto the operating platform 101. In order to make the steel bar 7 to be bent roll down along a predetermined route, at least two inclined plates or one ramp can be set between the highest end of the conveyor chain or conveyor belt and the operating platform 101, so that the steel bar 7 to be bent rolls to the predetermined bending position.

[0035] Lifting device embodiment two, such as Figures 3-6 As shown, the lifting mechanism 2 includes a fixed frame, a movable plate assembly movably mounted on the fixed frame, a transmission assembly for controlling the lifting and lowering of the movable plate assembly, a slant rail assembly that restricts the oblique lifting of the movable plate assembly and is connected to the fixed frame, and a drive member 205 for driving the transmission assembly to rotate. The fixed frame includes at least two fixed step plates 201 for temporarily placing the rebar 7 to be bent and fixed at parallel intervals. The movable plate assembly includes a mechanism for taking the rebar 7 from the horizontal transport mechanism 3 and from the fixed step plates 201. The lowest step of 01 is raised to at least two movable step plates 202 of the highest step. The at least two movable step plates 202 are located between at least two fixed step plates 201 and are arranged in parallel and spaced apart. The step inclination direction of the movable step plate 202 is the same as that of the fixed step plate 201. The direction of the inclined rail assembly is consistent with the step inclination direction of the fixed step plate 201. The highest step of the fixed step plate 201 extends above the operating platform 101 and is inclined to one side of the operating platform 101.

[0036] The transmission assembly includes mounting rods 210 for fixing at least two of the movable step plates 202, a rotating shaft 203 driven by the drive member 205, and an eccentric wheel 204 eccentrically fixed to the rotating shaft 203 with its outer circumferential surface in contact with the mounting rods 210. When the protruding section of the eccentric wheel 204 contacts the mounting rod 210, the height of the movable step plate 202 is higher than the height of the fixed step plate 201; when the narrowed section of the eccentric wheel 204 contacts the mounting rod 210, the height of the movable step plate 202 is lower than the height of the fixed step plate 201. Specifically, the drive member 205 includes a motor and a clutch. The motor generates power to drive the rotating shaft 203 to rotate, and the clutch assembly controls the rotation frequency of the rotating shaft 203. The mounting frame also includes a lifting frame 207 located below the fixed step plate 201. In this embodiment, there are six fixed step plates 201, which are fixed at intervals on the lifting frame 207. There are five movable step plates 202, each of which is positioned between two adjacent fixed step plates 201. The eccentric wheel 204 allows the mounting rod 210 to drive the movable mounting rod 210 to move up and down regularly. In conjunction with the inclined rail assembly, it enables the bending steel bar 7 on the next step of the fixed step plate 201 to be taken over and lifted to the next step of the fixed step plate 201, thereby sending the bending steel bar 7 to the operating platform 101 for bending operation.

[0037] The number of eccentric wheels 204 is at least two, and the at least two eccentric wheels 204 are fixedly spaced on the rotating shaft 203. The mounting rod 210 is provided with at least two ear plate assemblies 211 corresponding to the at least two eccentric wheels 204. A rotating wheel for contact with the eccentric wheel 204 is rotatably mounted on each ear plate assembly 211. In this embodiment, the number of eccentric wheels 204 is three, and the three eccentric wheels 204 are fixedly spaced on the mounting rod 210. The number of ear plate assemblies 211 is three, and they correspond one-to-one with the eccentric wheels 204. Each ear plate assembly 211 includes two ear plates, a fixed base, and a rotating wheel. The first ends of the two ear plates are jointly fixed to the fixed base, which is fixed to the mounting rod 210. The rotating wheel is mounted on the second ends of the two ear plates via pins. Openings are provided on the two ear plates for the pins to pass through. The eccentric wheel 204 rotates in contact with the rotating wheel, thereby reducing the frictional force of the eccentric wheel 204 rotation.

[0038] The inclined rail assembly includes a slide rail 206 fixed to the fixed frame and a slider 209 slidably mounted on the slide rail 206, the slider 209 being fixed to the mounting rod 210. The inclined direction of the slide rail 206 is the same as the inclined direction of the fixed step and the movable step plate 202, thereby providing guidance for the upward lifting of the movable step plate 202, so that the lifting process of the movable step plate 202 has a tendency to lift the curved steel bar 7 to be bent to the next step. That is to say, during the lifting process of the movable step plate 202, there is a vertical upward displacement as well as a horizontal displacement to one side of the operating platform 101, and not just a vertical displacement.

[0039] Preferred, such as Figure 8 As shown, the elbow main plate 801 has an elbow frame 811 at its bottom, and the movable guide post 803 has a rotating disk 807 at its bottom. The drive component 805 is fixed to the elbow frame 811 and drives the rotating disk 807 to rotate. Furthermore, a planetary reducer 808 connects the rotating disk 807 and the drive component 805. When the movable guide post 803 reaches the end of the guide groove 804, it is held for a certain period of time. The planetary reducer then controls the return speed of the movable guide post 803 to ensure slow movement during its return, preventing excessive rebound force after the rebar bends and potential damage to the device. The drive component 805 is a servo motor. The rotating disk 807 is located below the elbow main plate 801, and the drive component 805 and the planetary reducer 808 are fixed to the elbow frame 811 and located below the rotating disk 807. In this embodiment, the guide groove 804 is a semi-circular ring located outside the fixed guide post 802, and there is an accommodating space between the guide groove 804 and the fixed guide post 802 so that the reinforcing bar can be bent around the outer periphery of the fixed guide post 802.

[0040] Preferably, the elbow device 8 further includes a centering device for controlling the bending inflection point of the reinforcing bar to be bent. This centering device includes a centering cylinder 809 fixed to the elbow frame 811 and a centering baffle 810 fixed to the front end of the centering cylinder 809 and used to abut the reinforcing bar to be bent. The centering device, controlled by a program, activates the centering cylinder 809, pushing the centering baffle 810 to push the reinforcing bar to a predetermined position to ensure the bending angle and bending inflection point. Furthermore, the elbow main plate 801 is also provided with an auxiliary positioning mechanism for assisting in locating the bending inflection point of the elbow. This auxiliary positioning mechanism includes an electric telescopic rod and a positioning plate installed at the front end of the electric telescopic rod.

[0041] Preferably, a rotating sleeve 806 is rotatably fitted onto the movable guide post 803, the diameter of which is adapted to the width of the guide groove 804. The rotating sleeve 806 can rotate independently about the central axis of the movable guide post 803. Its function is to allow the movable guide post 803 to rotate with the bending process when the rebar is bent, replacing sliding friction with rolling friction, reducing the wear of the movable guide post 803, and improving bending efficiency.

[0042] Preferred, such as Figure 7 , Figure 9 and Figure 10 As shown, the operating platform includes two semi-assembled panels, a guide plate connecting the two semi-assembled panels, and a hand-cranked screw module 9 for controlling the two guide plates to move closer or further apart. The operating platform has an operating frame at its bottom. The hand-cranked screw module 9 includes a moving rail fixed to the operating frame and a moving block slidably mounted on the moving rail. The bottom of the semi-assembled panel is fixed to the moving block. Specifically, the moving rail is a screw 901. A hand crank 902 is fixed to the end of the screw 901 away from the semi-assembled panel. The screw 901 is fixed to the operating frame via two bearing seats 903. The bottom surface of the bearing seats 903 has pads 904 for fixing to the operating frame. One bearing seat 903 is located on the end of the screw 901 on the bottom surface of the semi-assembled panel, and the other bearing seat 903 is located on the screw 901 near the hand crank 902, thus ensuring that the screw 901 rotates smoothly. The slider remains in its original position, while the slider can move back and forth on the lead screw 901. The slider is a nut 905, preferably made of copper. The outer periphery of the nut 905 is provided with a nut seat 906, which is fixed to the bottom of the half-splicing plate. Thus, when the hand crank 902 is turned, the nut seat 906 can move back and forth along the lead screw 901, thereby enabling the two half-splicing plates to be relatively close to each other or relatively far apart, thus controlling the distance between the two half-splicing plates, thereby adjusting the position of the stop block, and further adjusting the radius of the steel bar bend.

[0043] Preferred, such as Figure 2 As shown, the horizontal transport mechanism 3 includes a conveyor chain 301 for transporting the curved steel bar 7 to be bent to the lowest step position of the fixed step plate 201. Specifically, the horizontal transport mechanism includes a horizontal transport frame 302 and at least two conveyor groups fixed on the horizontal transport frame 302, each conveyor group including at least one conveyor chain 301. The conveyor chain 301 can also be replaced with a conveyor belt as needed. In this embodiment, there are five conveyor groups, which are fixed at intervals on the horizontal transport frame 302, and each conveyor group includes two conveyor chains 301. The two conveyor chains 301 are located on the same axis. One conveyor chain 301 away from the lifting mechanism 2 is positioned closer to the lifting mechanism 2, and the two conveyor chains 301 are connected by a diagonal bar, so that the curved steel bar 7 slides from the conveyor chain 301 away from the lifting mechanism 2 into the conveyor chain 301 closer to the lifting mechanism 2 for further conveying. The conveyor chain 301 is connected to a drive shaft via a belt, and the drive shaft is driven to rotate by a feeding motor. Both the conveyor chain 301 and the conveyor belt use existing finished transport chains and belts.

[0044] Preferred, such as Figure 3 , Figure 4 and Figure 6 As shown, the top of the fixed step plate 201 is provided with an inclined plate 208 for the steel bar 7 to be bent to slide onto the operating platform 101. The operating platform 101 is provided with at least two longitudinal limiting blocks 103 for blocking the steel bar 7 to be bent from sliding down the inclined plate 208. The longitudinal limiting blocks 103 are installed on the operating platform 101 in a height-adjustable manner, and the lowest height of the longitudinal limiting blocks 103 is lower than the height of the operating platform 101. Specifically, the operating platform 101 has an opening for the limiting blocks to pass through, so that the longitudinal limiting blocks 103 can rise and fall within the opening. This allows them to rise to the height of the steel bar 7 to be bent before the bending operation to block the steel bar 7, thus facilitating the centering operation of the pushing member 104. During the bending operation, they descend into the opening of the operating platform 101 to avoid the steel bar 7.

[0045] Preferably, this is as follows Figure 1 and Figure 7 As shown, two pushers 104 are installed on both sides of the operating platform 101 to align the center of the rebar 7 to be bent with the arc center of the multiple stops 105. The pushers 104 correspond to the two ends of the rebar 7 on the operating platform 101. Specifically, an operating frame is provided below the operating platform 101, with support frames extending from both sides for mounting the pushers 104. The pushers 104 can be hydraulic rods or electric telescopic rods, with a pusher plate fixed to the front end of the pusher rod, making it easier to align the ends of the rebar 7. The pushers 104 align the center of the rebar 7 with the arc center of the multiple stops 105, ensuring a consistent shape after bending.

[0046] Preferably, this is as follows Figure 1 and Figure 7As shown, the side conveyor assembly includes a side lifting frame 402, a side guide rail fixed to the side lifting frame 402, a side slider slidably mounted on the side guide rail, and a side conveyor belt 401 mounted on the side slider. When the side lifting frame 402 is raised to its highest position, the upper surface of the side conveyor belt 401 is higher than the height of the stop block 105. When the side lifting frame 402 is lowered to its lowest position, the upper surface of the side conveyor belt 401 is lower than the height of the operating platform 101. The movement of both the side conveyor belt 401 and the side slider is driven by a motor. A collection rack 5 for collecting bent rebars can be set on the side of the operating platform 101 away from the lifting mechanism 2. The upper surface of the collection rack 5 has an inclined surface for the bent rebars to slide on, and the side of the collection rack 5 away from the operating platform 101 is provided with a vertical bar to block the bent rebars. The side conveyor belt 401 is first lowered to the lowest height by the side lifting frame 402. After the rebar is bent, the side conveyor belt 401 moves to below the bent rebar by the slider 209. The side lifting frame 402 is raised to lift the bent rebar. The side slider is moved and the side conveyor belt 401 is driven to rotate at the same time, thereby causing the bent rebars to fall into the collection rack 5, thus completing the collection of the bent rebars.

[0047] Furthermore, such as Figure 1 and Figure 7 As shown, the operating platform 101 can be equipped with a side lifting frame for lifting the bent rebar. The side lifting frame is vertically mounted on the operating platform 101, and the minimum height of the side lifting frame is lower than the height of the operating platform 101. Thus, the height of the side conveyor belt 401 can be set to be flush with or slightly higher than the operating platform 101. When it is necessary to transport the bent rebar, the bent rebar is first lifted to a certain height by the side lifting frame, and then the side conveyor belt 401 is moved to below the bent rebar. The bent rebar is then lowered so that it falls onto the side conveyor belt 401 for transport and collection.

[0048] The maximum height of the side conveyor belt 401 can also be set higher than the height of the bend device. The maximum height of the side lifting frame is higher than the side conveyor belt 401, so that the completed bend rebar can be completely lifted. The end of the side conveyor belt 401 extends a certain distance from the side slider, so that the side conveyor belt 401 can extend from above the bend device and catch the completed bend rebar. After the side lifting frame descends, the completed bend rebar falls onto the side conveyor belt 401.

[0049] Preferably, the operating platform 101 has a middle conveyor belt assembly in the middle for removing the middle part of the bent steel bar from the operating platform 101 and parallel to the side conveyor belt assembly. The middle conveyor belt assembly includes a middle lifting frame 404, a middle guide rail fixed on the middle lifting frame 404, a middle slider slidably installed on the middle guide rail, and a middle conveyor belt 403 installed on the middle slider. The operating platform 101 has a notch on the side away from the feeding device for accommodating the middle guide rail. Specifically, the lifting frame 404 can be directly installed on the operating frame through the notch. The operating platform 101 can also be further equipped with a lifting frame 106 for lifting the middle part of the bent rebar. The lifting frame 106 is installed on the operating platform 101 in a lifting manner. The lowest height of the lifting frame 106 is lower than the height of the operating platform 101, so that the height of the conveyor belt 403 can be set to be flush with or slightly higher than the operating platform 101. When it is necessary to transport the bent rebar, the bent rebar is first lifted to a certain height by the lifting frame 106, and then the conveyor belt 403 is moved to below the bent rebar. The bent rebar is then lowered so that it falls on the conveyor belt 403 for transport and collection.

[0050] On the other hand, such as Figures 1-10 As shown, the present invention also provides a method for bending multiple sections of reinforcing bars using the multi-section bending machine described above, comprising the following steps: a horizontal transport mechanism 3 transports the reinforcing bar 7 to be bent to a lifting mechanism 2 until the reinforcing bar 7 is located on the lifting mechanism 2; the lifting mechanism 2 lifts the reinforcing bar 7 until it falls onto the operating platform 101; force is applied to both sides of the reinforcing bar 7 by sliding the guide wheel 102, and multiple stops 105 block the middle of the reinforcing bar 7, causing the reinforcing bar to be bent... When the reinforcing bar 7 bends, the guide wheel 102 returns to its original position; the operating platform 101 descends, causing the reinforcing bar to be bent to fall into the accommodating space between the fixed guide post 802 and the movable guide post 803. The movable guide post 803 is driven to move along the guide groove 804 by the driving component 805, causing the reinforcing bar to be bent around the fixed guide post 802, returning to the movable guide post 803, and the operating platform 101 rises, lifting the bent reinforcing bar from the bending main board 801; the bent reinforcing bar is removed from the operating platform 101 by the side conveyor belt assembly.

[0051] Specifically, when the rebar 7 to be bent approaches the lifting mechanism 2, the driving component 205 drives the transmission assembly to rotate. The transmission assembly controls the moving plate assembly to descend until the lowest step of the movable step plate 202 is below the rebar 7 to be bent. The transmission assembly then controls the moving plate assembly to rise until it receives the rebar 7 from the horizontal transport mechanism 3. Next, the driving component 205 drives the transmission assembly to rotate, which in turn controls the moving plate assembly to descend, causing the movable step plate 202 to place the rebar 7 on the lowest step of the fixed step plate 201. The transmission assembly then controls the moving plate assembly to rise, causing the movable step plate 202 to place the rebar 7 on the lowest step of the fixed step plate 201. When the reinforcing bar 7 to be bent is taken again, the transmission assembly controls the moving plate assembly to descend, so that the movable step plate 202 places the reinforcing bar 7 to be bent on the step above the fixed step plate 201. This is repeated until the reinforcing bar 7 to be bent is raised to the highest step of the fixed step plate 201. At this time, the reinforcing bar 7 to be bent can be stopped at the predetermined position before bending by the guide of the inclined plate 208 and the limit of the longitudinal limiting block 103. Then, the two ends of the reinforcing bar are pushed by the two side pushers 104 to align the center of the reinforcing bar 7 with the center of the pre-bending arc. Then, the bending operation is performed by the guide wheel 102, and then the bending head operation is performed.

[0052] This invention solves the technical problems of existing technologies, such as the difficulty in bending multiple forward or reverse bending segments of different diameters, or the need to transfer the rebar to another bending machine for additional bending segments, by using a bending device and a bending head device to automatically bend a single rebar in multiple segments. This invention enables fully automated bending of rebar without manual operation, greatly improving bending efficiency and saving on labor and other machine manufacturing costs.

[0053] All parts not described in this invention are the same as or can be implemented using existing technologies. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, shall still fall within the scope of the present invention.

Claims

1. A multi-segment bending machine for reinforcing bars, characterized in that, include: The bending device includes a liftable operating platform, multiple stops that are detachably mounted on the operating platform in an arc shape for controlling the bending angle of the steel bar to be bent, and guide wheels that are slidably mounted on both sides of the operating platform for applying bending force to the steel bar to be bent. The feeding device includes a horizontal transport mechanism for transporting the steel bar to be bent and a lifting mechanism for lifting the steel bar from the horizontal transport mechanism to the operating platform. The lifting mechanism is connected between the horizontal transport mechanism and the operating platform. An elbow device is disposed on the side of a bending device. The elbow device includes an elbow main board, a fixed guide post fixed on the elbow main board, a movable guide post that rotates around the fixed guide post and applies bending force to the end of the bent steel bar, and a driving component that drives the movable guide post to move. The elbow main board has a guide groove for the movable guide post to move, and an accommodating space for accommodating the bent steel bar is formed between the fixed guide post and the movable guide post. The unloading device includes a side conveyor belt assembly for removing the bent steel bars from the operating platform, the side conveyor belt assembly being slidably mounted on both sides of the bending device. A rotating sleeve is rotatably fitted onto the movable guide post, and the diameter of the rotating sleeve is adapted to the width of the guide groove. The operating platform includes two half-splicing plates, a guide plate connecting the two half-splicing plates, and a hand-cranked screw module that controls the two guide plates to move closer or further apart. The operating platform has an operating frame at the bottom. The hand-cranked screw module includes a moving rail fixed to the operating frame and a moving block slidably installed on the moving rail. The bottom of the half-splicing plate is fixed to the moving block. The two half-splicing plates are brought closer together or moved further apart by a hand-cranked screw module, thus controlling the distance between them and adjusting the position of the stop block to further adjust the radius of the steel bar bend. The side conveyor assembly includes a side lifting frame, a side guide rail fixed to the side lifting frame, a side slider slidably mounted on the side guide rail, and a side conveyor belt mounted on the side slider. When the side lifting frame is raised to its highest position, the upper surface of the side conveyor belt is higher than the height of the stop block. When the side lifting frame is lowered to its lowest position, the upper surface of the side conveyor belt is lower than the height of the operating platform.

2. The multi-segment rebar bending machine according to claim 1, characterized in that, The elbow main board has an elbow frame at its bottom, the movable guide post has a rotating disk at its bottom, and the driving component is fixed to the elbow frame and drives the rotating disk to rotate.

3. The multi-segment rebar bending machine according to claim 2, characterized in that, The bending device also includes a centering device for controlling the bending inflection point of the reinforcing bar to be bent. The centering device includes a centering cylinder fixed on the bending frame and a centering baffle fixed to the front end of the centering cylinder and used to abut against the reinforcing bar to be bent.

4. The multi-segment rebar bending machine according to claim 1, characterized in that, The lifting mechanism includes an inclined plate for the steel bar to be bent to slide onto the operating platform. The operating platform is provided with at least two longitudinal limiting blocks for blocking the steel bar to be bent from sliding down the inclined plate. The longitudinal limiting blocks are installed on the operating platform in a liftable manner, and the minimum height of the longitudinal limiting blocks is lower than the height of the operating platform.

5. The multi-segment rebar bending machine according to claim 1, characterized in that, The operating platform is equipped with two jacking members on both sides for aligning the center of the rebar to be bent with the arc center of the plurality of stops. The jacking members correspond to the two ends of the rebar to be bent on the operating platform.

6. The multi-segment rebar bending machine according to claim 1, characterized in that, The operating platform is provided with a central conveyor belt assembly for removing the middle part of the bent rebar from the operating platform and is parallel to the side conveyor belt assembly. The central conveyor belt assembly includes a central lifting frame, a central guide rail fixed on the central lifting frame, a central slider slidably installed on the central guide rail, and a central conveyor belt installed on the central slider. The operating platform has a notch on the side away from the feeding device for accommodating the central guide rail.

7. A method for bending multiple sections of reinforcing bars using a multi-section bending machine as described in claim 1, characterized in that, Includes the following steps: The horizontal transport mechanism transports the steel bar to be bent to the lifting mechanism until the steel bar is located on the lifting mechanism; The lifting mechanism lifts the steel bar to be bent until it falls onto the operating platform; The guide wheel slides and applies force to both sides of the curved steel bar to be bent, while multiple blocks block the middle of the curved steel bar to be bent, causing the curved steel bar to be bent, and the guide wheel returns to its original position. The operating platform descends, causing the rebar to be bent to fall into the accommodating space between the fixed guide post and the movable guide post. The movable guide post is driven by the driving component to move along the guide groove, causing the rebar to be bent around the fixed guide post. The rebar then returns to the movable guide post, and the operating platform rises to lift the bent rebar from the bending main board. The bent rebar is removed from the operating platform via a side conveyor belt assembly.

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