Reinforcing bar bending machine and reinforcing bar bending method

Abstract

The present application relates to a kind of reinforcing bar bending machine and reinforcing bar bending method, reinforcing bar bending machine includes: bending device;Feeding device, the feeding mechanism includes horizontal transport mechanism, lifting mechanism is connected between the horizontal transport mechanism and the bending device, lifting mechanism includes fixed frame, movable mounting in fixed frame Dynamic plate assembly, control the transmission assembly of dynamic plate assembly lifting and descending, limit dynamic plate assembly oblique lifting and be connected to the inclined rail assembly of fixed frame, and drive the rotation of drive component of transmission assembly;Discharging device, discharging mechanism includes for the reinforcing bar that the bending is completed from operating platform is removed side conveyor belt assembly, side conveyor belt assembly sliding installation in the bending mechanism both sides.The present application solves the technical problem that reinforcing bar bending machine needs to be manually supplemented in prior art straight reinforcing bar and manually removes the reinforcing bar that bending is completed.The present application realizes the full automation of reinforcing bar bending, reduces the labor cost, also reduces the security risk when manual operation.

Description

Technical Field

[0001] This invention relates to the field of mechanical technology, and in particular to a rebar bending machine and a rebar bending method. 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. However, conventional rebar bending machines often require manual straightening of the rebar and manual removal of the bent rebar, thus failing to achieve full automation. This increases labor costs and safety risks associated with manual operation. Summary of the Invention

[0003] To address the shortcomings of the existing technology, this invention provides a rebar bending machine and a rebar bending method, which solves the technical problems of requiring manual replenishment of straight rebars and manual removal of bent rebars in the existing rebar bending machines.

[0004] In a first aspect, the present invention discloses a rebar bending machine, comprising:

[0005] The bending device includes an 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 and a lifting mechanism connected between the horizontal transport mechanism and the bending device. The lifting mechanism includes a fixed frame, a movable plate assembly movably mounted on the fixed frame, a transmission assembly controlling the lifting and lowering of the movable plate assembly, a slant rail assembly limiting the oblique lifting of the movable plate assembly and connected to the fixed frame, and a drive component driving the transmission assembly to rotate.

[0007] The fixing frame includes at least two fixed step plates for temporarily placing the rebar to be bent and fixed at parallel intervals. The movable plate assembly includes at least two movable step plates for taking the rebar to be bent from the horizontal transport mechanism and lifting it from the lowest step of the fixed step plate to the highest step. The at least two movable step plates are located between the at least two fixed step plates and are arranged at parallel intervals. The step inclination direction of the movable step plate is the same as that of the fixed step plate. The direction of the inclined rail assembly is consistent with the step inclination direction of the fixed step plate. The highest step of the fixed step plate extends above the operating platform and is inclined towards one side of the operating platform.

[0008] 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 mechanism.

[0009] A further improvement of the rebar bending machine of the present invention is that the transmission assembly includes a mounting rod for fixing at least two of the movable step plates, a rotating shaft driven by the driving member, and an eccentric wheel eccentrically fixed to the rotating shaft and whose outer peripheral surface contacts the mounting rod. When the protruding section of the eccentric wheel contacts the mounting rod, the height of the movable step plate is higher than the height of the fixed step plate. When the narrowing section of the eccentric wheel contacts the mounting rod, the height of the movable step plate is lower than the height of the fixed step plate.

[0010] A further improvement of the steel bar bending machine of the present invention is that the number of eccentric wheels is at least two, the at least two eccentric wheels are fixed at intervals on the rotating shaft, the mounting rod is provided with at least two ear plate groups corresponding one-to-one with the at least two eccentric wheels, and the ear plate groups are rotatably mounted with rotating wheels for contact with the eccentric wheels.

[0011] A further improvement of the steel bar bending machine of the present invention is that the inclined rail assembly includes a slide rail fixed to the fixed frame and a slider slidably mounted on the slide rail, the slider being fixed to the mounting rod.

[0012] A further improvement of the steel bar bending machine of the present invention is that the horizontal transport mechanism includes a conveyor chain for transporting the steel bar to be bent to the lowest step position of the fixed step plate.

[0013] A further improvement of the rebar bending machine of the present invention is that the top of the fixed step plate is provided with an inclined plate for the rebar 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 rebar 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 lowest height of the longitudinal limiting blocks is lower than the height of the operating platform.

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

[0015] A further improvement of the rebar bending machine 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 rebar bending machine 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 rebar 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 bending reinforcing bars using the reinforcing bar bending machine described above, comprising the following steps:

[0018] The horizontal transport mechanism transports the steel bar to be bent toward the lifting mechanism until the steel bar to be bent is close to the lifting mechanism;

[0019] The driving component drives the transmission assembly to rotate, and the transmission assembly controls the moving plate assembly to descend until the lowest step of the movable step plate is below the rebar to be bent. The transmission assembly then controls the moving plate assembly to rise until the rebar to be bent is taken from the horizontal transport mechanism.

[0020] The drive component then drives the transmission assembly to rotate, which in turn controls the moving plate assembly to descend, placing the rebar to be bent onto the lowest step of the fixed step plate. The transmission assembly then controls the moving plate assembly to rise, allowing the moving plate assembly to take the rebar from the fixed step plate again. The transmission assembly then controls the moving plate assembly to descend, placing the rebar to be bent onto the next step of the fixed step plate. This process is repeated until the rebar to be bent is raised to the highest step of the fixed step plate.

[0021] The steel bar to be bent rolls from the highest step of the fixed stepped plate to the operating platform. The guide wheel slides and applies force to both sides of the steel bar to be bent. Multiple blocks block the middle of the steel bar to be bent, causing the steel bar to be bent. The guide wheel returns to its original position.

[0022] The bent steel bars are removed from the operating platform via a side conveyor belt assembly.

[0023] Compared with existing technologies, the advantages of this invention are positive and significant. This invention achieves fully automated feeding and unloading of reinforcing bars through a feeding device and an unloading device, solving the technical problem in existing reinforcing bar bending machines that require manual replenishment of straight reinforcing bars and manual removal of bent reinforcing bars. This invention achieves full automation of reinforcing bar bending, reducing labor costs and safety risks associated with manual operation. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a schematic diagram of the overall structure of the rebar bending machine of the present invention.

[0026] Figure 2 This is a side view of the steel bar bending machine of the present invention.

[0027] Figure 3 This is a schematic diagram of the horizontal transport mechanism of the steel bar bending machine of the present invention.

[0028] Figure 4 This is a schematic diagram of the lifting mechanism structure of the rebar bending machine of the present invention. Figure 1 .

[0029] Figure 5 This is a schematic diagram of the lifting mechanism structure of the rebar bending machine of the present invention. Figure 2 .

[0030] Figure 6 This is a front view of the lifting mechanism of the rebar bending machine of the present invention.

[0031] Figure 7 for Figure 6 Sectional view along line AA.

[0032] Figure 8 This is a schematic diagram of the bending device and the feeding device of the steel bar bending machine of the present invention.

[0033] 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. Detailed Implementation

[0034] 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.

[0035] like Figures 1 to 8 As shown, the present invention provides a rebar bending machine, comprising: a bending device 1, the bending mechanism including an operating platform 101, a plurality of stops 105 detachably mounted on the operating platform 101 in an arc shape for controlling the bending angle of the rebar 7 to be bent, and guide wheels 102 slidably mounted on both sides of the operating platform 101 for applying bending force to the rebar 7 to be bent; and a feeding device, the feeding mechanism including a horizontal transport mechanism 3 and a lifting mechanism 2 connected between the horizontal transport mechanism 3 and the bending device 1, the lifting mechanism 2 including 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 for limiting the oblique lifting of the movable plate assembly and connected to the fixed frame, and a drive member 205 for driving the transmission assembly to rotate, wherein the fixed frame includes parallel and spaced fixed components for temporarily placing the rebar 7 to be bent. The system includes at least two fixed step plates 201, and the movable plate assembly includes at least two movable step plates 202 for taking the steel bar 7 to be bent from the horizontal transport mechanism 3 and lifting it from the lowest step to the highest step of the fixed step plate 201. The at least two movable step plates 202 are located between the 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. The system also includes a feeding device 4, which 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 mechanism.

[0036] Specifically, such as Figure 1 and Figure 8As shown, the operating platform 101 is provided 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 rebar bending. The operating platform 101 can also be configured as a two-half structure connected by a telescopic plate. When adjusting the distance between the two halves, the curvature of the rebar bending can also be adjusted. A power distribution box 6 for supplying power to the entire machine is set next to the rebar bending machine. In this invention, the rebar 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 rebar to be bent 7 to the top of the fixed step plate 201. The rebar to be bent 7 slides down onto the operating platform 101 under the action of gravity and is bent by the guide wheel 102. The bent rebar is transported to the collection rack 5 by the unloading device 4, thereby realizing the automatic feeding, bending, unloading and collection of rebar, realizing the automation of rebar bending operation, saving labor costs and reducing the safety risks of manual operation.

[0037] Preferred, such as Figures 4-7 As shown, the transmission assembly includes mounting rods 210 for fixing at least two 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 allows the steel bar 7 to be bent 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 steel bar 7 to be bent to the operating platform 101 for bending.

[0038] Preferably, there are at least two eccentric wheels 204, which are fixed at intervals 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, there are three eccentric wheels 204, which are fixed at intervals on the mounting rod 210. There are also three ear plate assemblies 211, each corresponding to one of 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 for the pins to pass through are provided on the two ear plates. The eccentric wheel 204 rotates in contact with the rotating wheel, thereby reducing the frictional force of the eccentric wheel 204 rotation.

[0039] Preferred, such as Figure 5 As shown, 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 steel bar 7 to be bent to the next step. That is to say, during the lifting process of the movable step plate 202, it has a vertical upward displacement as well as a horizontal displacement to one side of the operating platform 101, and not just a vertical displacement.

[0040] Preferred, such as Figure 3 As shown, the horizontal transport mechanism 3 includes a conveyor chain 301 for transporting the rebar 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 to 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, with one conveyor chain 301 away from the lifting mechanism 2 positioned closer to the lifting mechanism 2, and a diagonal bar connecting the two conveyor chains 301, so that the rebar 7 to be bent 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.

[0041] Preferred, such as Figure 1 , Figure 4 and Figure 5 As shown, the top of the fixed step plate 201 is provided with an inclined plate 208 for the reinforcing 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 reinforcing bar 7 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 reinforcing bar 7 before the bending operation to block the reinforcing 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 reinforcing bar 7.

[0042] Preferably, this is as follows Figure 1 and Figure 8 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 to be bent on the operating platform 101. Specifically, an operating frame is provided below the operating platform 101, with support frames extending from both sides of the operating frame 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 to be bent. The pushers 104 can align the center of the rebar 7 to be bent with the arc center of the multiple stops 105, thereby ensuring a consistent shape after bending.

[0043] Preferably, this is as follows Figure 1 , Figure 2 and Figure 8As 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 rebar to fall into the collection rack 5, thus completing the collection of the bent rebars.

[0044] Furthermore, such as Figure 1 and Figure 8 As shown, the operating platform 101 can be equipped with a side lifting frame for lifting the bent steel bars. The side lifting frame is installed on the operating platform 101 in a lifting manner. The minimum height of the side lifting frame is lower than the height of the operating platform 101, so that 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 steel bars, the bent steel bars are first lifted to a certain height by the side lifting frame, and then the side conveyor belt 401 is moved to below the bent steel bars. The bent steel bars are then lowered so that they fall onto the side conveyor belt 401 for transport and collection.

[0045] Preferably, the operating platform 101 has a central conveyor belt assembly for removing the middle part of the bent steel bar from the operating platform 101 and parallel to the side conveyor belt assembly. The central conveyor belt assembly includes a central lifting frame 404, a central guide rail fixed on the central lifting frame 404, a central slider slidably mounted on the central guide rail, and a central conveyor belt 403 mounted on the central slider. The operating platform 101 has a notch on the side away from the feeding device for accommodating the central 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 steel bar. The lifting frame 106 can be 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 steel bar, the bent steel bar is first lifted to a certain height by the lifting frame 106, and then the conveyor belt 403 is moved to the bottom of the bent steel bar. The bent steel bar is then lowered so that it falls on the conveyor belt 403 for transport and collection.

[0046] On the other hand, such as Figures 1 to 8 As shown, the present invention also provides a method for bending reinforcing bars using the reinforcing bar 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 close to the lifting mechanism 2; a drive member 205 drives a 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 reinforcing bar 7 to be bent; the transmission assembly controls the moving plate assembly to rise until the reinforcing bar 7 is taken from the horizontal transport mechanism 3; then the drive member 205 drives the transmission assembly to rotate, 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 lowest step of the fixed step plate 201; the transmission assembly controls... The movable plate assembly is raised, allowing the movable step plate 202 to take over the rebar 7 to be bent again. The transmission assembly controls the movable plate assembly to descend, allowing the movable step plate 202 to place the rebar 7 to be bent on the step above the fixed step plate 201. This process is repeated until the rebar 7 to be bent is raised to the highest step of the fixed step plate 201. The rebar 7 to be bent rolls from the highest step of the fixed step plate 201 onto the operating platform 101. The guide wheel 102 slides and applies force to both sides of the rebar 7 to be bent. Multiple stops 105 block the middle of the rebar 7 to be bent, causing the rebar 7 to be bent. The guide wheel 102 returns to its original position. The bent rebar is removed from the operating platform 101 by the side conveyor belt assembly.

[0047] When the reinforcing bar 7 to be bent is raised to the highest step of the fixed step plate 201, 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 pushers 104 on both sides 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.

[0048] This invention achieves fully automated feeding and unloading of reinforcing bars through a feeding device and an unloading device, solving the technical problem in existing reinforcing bar bending machines that require manual replenishment of straight reinforcing bars and manual removal of bent reinforcing bars. This invention realizes full automation of reinforcing bar bending, reducing labor costs and safety risks associated with manual operation.

[0049] 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 rebar bending machine, characterized in that, include: The bending device includes an 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. A feeding device includes a horizontal transport mechanism and a lifting mechanism connected between the horizontal transport mechanism and the bending device. The lifting mechanism 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 component for driving the transmission assembly to rotate. The fixing frame includes at least two fixed step plates for temporarily placing the steel bar to be bent and fixed in parallel at intervals. The movable plate assembly includes at least two movable step plates for taking the steel bar to be bent from the horizontal transport mechanism and lifting it from the lowest step of the fixed step plate to the highest step. The at least two movable step plates are located between the at least two fixed step plates and are arranged in parallel at intervals. The step inclination direction of the movable step plates is the same as that of the fixed step plates. The direction of the inclined rail assembly is consistent with the step inclination direction of the fixed step plates. The highest step of the fixed step plate extends above the operating platform and is inclined towards one side of the operating platform. 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. 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 rebar bending machine according to claim 1, characterized in that, The transmission assembly includes a mounting rod for fixing at least two of the movable step plates, a rotating shaft driven by the driving member, and an eccentric wheel eccentrically fixed to the rotating shaft with its outer circumferential surface in contact with the mounting rod. When the protruding section of the eccentric wheel contacts the mounting rod, the height of the movable step plate is higher than the height of the fixed step plate. When the narrowed section of the eccentric wheel contacts the mounting rod, the height of the movable step plate is lower than the height of the fixed step plate.

3. The rebar bending machine according to claim 2, characterized in that, The number of eccentric wheels is at least two, and the at least two eccentric wheels are fixed at intervals on the rotating shaft. The mounting rod is provided with at least two ear plate groups that correspond one-to-one with the at least two eccentric wheels. The ear plate groups are rotatably mounted with rotating wheels for contact with the eccentric wheels.

4. The rebar bending machine according to claim 2, characterized in that, The inclined rail assembly includes a slide rail fixed to the mounting frame and a slider slidably mounted on the slide rail, the slider being fixed to the mounting rod.

5. The rebar bending machine according to claim 1, characterized in that, The horizontal transport mechanism includes a conveyor chain for transporting the steel bar to be bent to the lowest step position of the fixed step plate.

6. The rebar bending machine according to claim 1, characterized in that, The top of the fixed step plate is provided with 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 height-adjustable manner, and the minimum height of the longitudinal limiting blocks is lower than the height of the operating platform.

7. The rebar bending machine according to claim 1, characterized in that, The operating platform is equipped with two pushers on both sides for aligning the center of the reinforcing bar to be bent with the arc center of the plurality of stops. The pushers correspond to the two ends of the reinforcing bar to be bent on the operating platform.

8. The 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 steel bar 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.

9. A method for bending reinforcing bars using the reinforcing bar 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 toward the lifting mechanism until the steel bar to be bent is close to the lifting mechanism; The driving component drives the transmission assembly to rotate, and the transmission assembly controls the moving plate assembly to descend until the lowest step of the movable step plate is below the steel bar to be bent. The transmission assembly then controls the moving plate assembly to rise until it receives the steel bar to be bent from the horizontal transport mechanism. The drive component then drives the transmission assembly to rotate. The transmission assembly controls the moving plate assembly to descend, so that the movable step plate places the rebar to be bent on the lowest step of the fixed step plate. The transmission assembly then controls the moving plate assembly to rise, so that the movable step plate takes over the rebar to be bent again. The transmission assembly then controls the moving plate assembly to descend, so that the movable step plate places the rebar to be bent on the next step of the fixed step plate. This process is repeated until the rebar to be bent is raised to the highest step of the fixed step plate. The steel bar to be bent rolls from the highest step of the fixed step plate onto the operating platform. The guide wheel slides and applies force to both sides of the steel bar to be bent. Multiple blocks block the middle of the steel bar to be bent, causing the steel bar to be bent. The guide wheel returns to its original position. The bent steel bars are removed from the operating platform via a side conveyor belt assembly.

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