Steel bar multi-section bending machine

Abstract

The utility model discloses a multi-section bending machine for reinforcing steel bars. The multi-section bending machine comprises an arc bending device and a feeding device, the bending device is arranged on the side face of the arc bending device and comprises a bending main plate, a fixed guide column fixed to the bending main plate, a movable guide column rotating around the fixed guide column and applying bending force to the end of the arc-bent reinforcing steel bar, and a driving piece driving the movable guide column to move. A guide groove for the movable guide column to move is formed in the elbow main plate, and a containing space for containing the bent reinforcing steel bar is formed between the fixed guide column and the movable guide column. And a discharging device. The steel bar bending machine solves the technical problems that in the prior art, a plurality of forward or reverse bending sections with different diameters cannot be bent easily, or a steel bar needs to be moved to another bending machine to be manufactured into other bent arc sections.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, in particular to a steel bar multi-section bending machine. Background Art

[0002] The steel bar bending machine is one of the steel bar processing machines. The working mechanism is a horizontal working disc rotating on a vertical axis. The steel bar is placed in the dotted line position in the figure. The supporting pin is fixed on the machine bed. The center pin and the bending pin are installed on the working disc. The steel bar is bent when the disc rotates. Conventional steel bar bending machines can generally only bend a section of steel bar into an arc, but it is not easy to bend multiple sections of different diameters in the forward or reverse direction, or the steel bar needs to be moved to another bending machine to make other curved sections, which greatly increases the cost of machine manufacturing. Utility Model Content

[0003] In view of the shortcomings existing in the above-mentioned prior art, the utility model provides a multi-section steel bar bending machine, which solves the technical problems in the prior art that it is difficult to bend steel bars into multiple bending sections with different diameters in forward or reverse directions, or that the steel bars need to be moved to another bending machine to make other curved sections.

[0004] In a first aspect, the utility model discloses a steel bar multi-section bending machine, comprising:

[0005] The arc bending device comprises a liftable operating platform, a plurality of blocks 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 slidably mounted on both sides of the operating platform for applying a bending force to the steel bar to be bent;

[0006] A loading device, the loading device comprising a horizontal transport mechanism for transporting the steel bar to be bent, and a lifting mechanism for lifting the steel bar to be bent from the horizontal transport mechanism to the operating platform, the lifting mechanism being connected between the horizontal transport mechanism and the operating platform;

[0007] An elbow device is arranged on the side of the bending device, and comprises an elbow main board, a fixed guide column fixed on the elbow main board, a movable guide column rotating around the fixed guide column and applying a bending force to the end of the bending-completed steel bar, and a driving member driving the movable guide column to move, a guide groove for the movable guide column to move is opened on the elbow main board, and an accommodating space for accommodating the bending-completed steel bar is formed between the fixed guide column and the movable guide column;

[0008] The unloading device includes a side conveyor belt assembly for removing the bent steel bars from the operating platform, and the side conveyor belt assembly is slidably installed on both sides of the bending mechanism.

[0009] The multi-stage steel bar bending machine of the utility model is further improved in that an elbow frame is provided at the bottom of the elbow main board, a rotating disk is provided at the bottom of the movable guide column, and the driving member is fixed on the elbow frame and drives the rotating disk to rotate.

[0010] The utility model further improves the multi-section steel bar bending machine in that the bending device also includes a centering device for controlling the bending inflection point of the steel bar to be bent, and the centering device includes a centering cylinder fixed on the bending frame, and a centering baffle fixed on the front end of the centering cylinder and used to resist the steel bar to be bent.

[0011] The further improvement of the steel bar multi-section bending machine of the utility model lies in that a rotating sleeve is rotatably sleeved on the movable guide column, and the diameter of the rotating sleeve is matched with the width of the guide groove.

[0012] The multi-section steel bar bending machine of the utility model is further improved in that the operating platform includes two half-spliced ​​plates, a guide plate connecting the two half-spliced ​​plates, and a hand-cranked screw rod module for controlling the two guide plates to move closer or farther away. An operating frame is provided at the bottom of the operating platform. The hand-cranked screw rod module includes a movable rail fixed on the operating frame and a movable block slidably installed on the movable rail. The bottom of the half-spliced ​​plate is fixed to the movable block.

[0013] The multi-section steel bar bending machine of the utility model is further improved in that the lifting mechanism includes an inclined plate for the steel bar to be bent to slide to the operating platform, and the operating platform is provided with at least two longitudinal limit blocks for blocking the steel bar to be bent from sliding down from the inclined plate. The longitudinal limit blocks are installed on the operating platform in a liftable manner, and the lowest height of the longitudinal limit blocks is lower than the height of the operating platform.

[0014] The multi-section steel bar bending machine of the utility model is further improved in that two pushing members for aligning the center of the arc steel bar to be bent with the arc center of multiple blocks are installed on both sides of the operating platform, and the pushing members correspond to the two ends of the arc steel bar to be bent on the operating platform.

[0015] The multi-section steel bar bending machine of the utility model is further improved in 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 installed on the side guide rail, and a side conveyor belt installed on the side slider; when the side lifting frame rises to the highest position, the upper surface of the side conveyor belt is higher than the height of the block; when the side lifting frame falls to the lowest position, the upper surface of the side conveyor belt is lower than the height of the operating platform.

[0016] The multi-section steel bar bending machine of the utility model is further improved in that a middle conveyor belt assembly is provided in the middle of the operating platform for removing the middle part of the steel bar with the bent end 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 mounted on the middle guide rail, and a middle conveyor belt mounted on the middle slider. A gap is provided on the side of the operating platform away from the feeding device for accommodating the middle guide rail.

[0017] In the second aspect, the utility model also provides a method for bending multiple sections of steel bars using the multiple section steel bar bending machine as described above, comprising the following steps: a horizontal transport mechanism transports the steel bars to be bent to a lifting mechanism until the steel bars to be bent are located on the lifting mechanism; the lifting mechanism lifts the steel bars to be bent until the steel bars to be bent fall onto the operating platform; a guide wheel slides to apply force to both sides of the steel bars to be bent, a plurality of blocks block the middle of the steel bars to be bent, and the guide wheel returns to its original position; the operating platform descends, so that the steel bars to be bent fall into the accommodating space between the fixed guide column and the movable guide column, the movable guide column is driven by a driving member to move along the guide groove, so that the steel bars to be bent are bent around the fixed guide column, and return to the movable guide column, the operating platform is raised, and the completed steel bars are lifted from the bending main board; the completed steel bars are removed from the operating platform by a side conveyor belt assembly.

[0018] Compared with the prior art, the utility model has a positive and obvious effect. The utility model uses an arc bending device and an elbow device to perform full-automatic multi-section bending of a steel bar, thereby solving the technical problems in the prior art that it is difficult to achieve bending of multiple sections of different diameters in the forward or reverse direction, or that the steel bar needs to be moved to another bending machine for the production of other curved sections. The utility model can achieve full-automatic bending of steel bars without manual operation, greatly improving the efficiency of steel bar bending, while saving labor and other machine manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the multi-section steel bar bending machine of the present utility model.

[0021] Figure 2 It is a schematic diagram of the horizontal transport mechanism structure of the multi-section steel bar bending machine of the utility model.

[0022] Figure 3 The structure diagram of the lifting mechanism of the multi-section steel bar bending machine of the utility model is shown in FIG. Figure 1 .

[0023] Figure 4 The structure diagram of the lifting mechanism of the multi-section steel bar bending machine of the utility model is shown in FIG. Figure 2 .

[0024] Figure 5 It is a front view of the second embodiment of the lifting mechanism of the multi-section steel bar bending machine of the utility model.

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

[0026] Figure 7 It is a structural schematic diagram of the bending device and the feeding device of the multi-section steel bar bending machine of the utility model.

[0027] Figure 8 It is a schematic structural diagram of the bending device of the multi-section steel bar bending machine of the utility model.

[0028] Fig. 9 It is a schematic diagram of the structure of the hand-cranked screw rod module of the multi-section steel bar bending machine of the utility model.

[0029] Fig.10 This is a schematic diagram of the installation position of the hand-cranked screw rod module of the multi-section steel bar bending machine of the utility model.

[0030] Among them: 1. Bending device; 101. Operating platform; 102. Guide wheel; 103. Longitudinal limit block; 104. Pushing member; 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 member; 206. Slide rail; 207. Lifting frame; 208. Inclined plate; 209. Sliding block; 210. Mounting rod; 211. Ear plate group; 3. Horizontal transport mechanism; 301. Conveyor chain; 302. Horizontal transport frame; 4. Unloading device; 401. Side conveyor belt; 402. 2. Side lifting frame; 403. Middle conveyor belt; 404. Middle lifting frame; 5. Collecting frame; 6. Distribution box; 7. Steel bars to be bent; 8. Elbow device; 801. Elbow main board; 802. Fixed guide column; 803. Movable guide column; 804. Guide groove; 805. Driving member; 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-cranked wheel; 903. Bearing seat; 904. Spacer; 905. Nut; 906. Nut seat. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] like Figures 1 to 10 As shown, the utility model provides a steel bar multi-section bending machine, comprising: an arc bending device 1, the arc bending mechanism comprises a liftable operating platform 101, a plurality of blocks 105 detachably mounted on the operating platform 101 in an arc shape for controlling the bending angle of the steel bar 7 to be bent, and guide wheels 102 slidably mounted on both sides of the operating platform 101 for applying a bending force to the steel bar 7 to be bent; a feeding device, the feeding mechanism comprises a horizontal transport mechanism 3 for transporting the steel bar 7 to be bent, and a lifting mechanism 2 for lifting the steel bar 7 to be bent from the horizontal transport mechanism 3 to the operating platform 101, the lifting mechanism 2 being connected between the horizontal transport mechanism 3 and the operating platform 101; an elbow device 8, the elbow device 8 is arranged on the side of the bending device 1, and the bending device 8 includes an elbow main board 801, a fixed guide column 802 fixed on the elbow main board 801, a movable guide column 803 rotating around the fixed guide column 802 and applying a bending force to the end of the bent steel bar, and a driving member 805 driving the movable guide column 803 to move, and a guide groove 804 for the movable guide column 803 to move is opened on the elbow main board 801, and an accommodating space for accommodating the bent steel bar is formed between the fixed guide column 802 and the movable guide column 803; a feeding device 4, the feeding device 4 includes a side conveyor belt assembly for removing the bent steel bar from the operating platform 101, and the side conveyor belt assembly is slidably installed on both sides of the bending mechanism.

[0033] Specifically, Figure 1 and Figure 7As shown, the operating platform 101 is provided with a slide groove for each stopper 105 to slide and adjust the position one by one, and all the slide grooves are opened along the radial direction of the operating platform 101. The stopper 105 slides in the slide groove to adjust the curvature of the steel bar bending. A distribution box 6 for powering the entire machine is arranged next to the steel bar multi-section bending machine. The utility model transports the steel bar 7 to be bent to the position of the lifting mechanism 2 through the horizontal transportation mechanism 3, and the lifting mechanism 2 lifts the steel bar 7 to be bent to the highest end. The steel bar 7 to be bent slides to the operating platform 101 by gravity and is bent by the guide wheel 102, and then the end is bent by the bending mechanism. The steel bar with the bending completed is transported to the collection rack 5 through the unloading device 4, thereby realizing the automatic loading, bending, unloading and collection of steel bars, realizing the automatic operation of multi-section bending of steel bars, saving labor costs, and reducing the safety risks of manual operation.

[0034] Embodiment 1 of the lifting device: the lifting device 2 can use at least two groups of conveyor chains or conveyor belts to convey obliquely upward, and a plurality of slots for accommodating the to-be-bent steel bars 7 are arranged at intervals on the outer circumference of the conveyor chain or conveyor belt, and the lowest end of the conveyor chain or conveyor belt is lower than the horizontal transport device, so that the to-be-bent steel bars 7 can fall into the slots from the horizontal transport device, and the highest end of the conveyor chain or conveyor belt is set at the height of the operating platform, so that the to-be-bent steel bars 7 can move from the lowest end to the highest end as the conveyor chain or conveyor belt rotates, and then the conveyor chain or conveyor belt continues to rotate to make the to-be-bent steel bars 7 fall onto the operating platform 101. In order to make the to-be-bent steel bars 7 roll down along a predetermined route, at least two inclined plates or a slope can be set between the highest end of the conveyor chain or conveyor belt and the operating platform 101, so that the to-be-bent steel bars 7 can roll to the predetermined bending position.

[0035] Lifting device embodiment 2, such as Figure 3 to Figure 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, an inclined rail assembly for limiting the oblique lifting of the movable plate assembly and connected to the fixed frame, and a driving member 205 for driving the transmission assembly to rotate, wherein the fixed frame includes at least two fixed step plates 201 for temporarily placing the arc-bending steel bar 7 and fixed in parallel at intervals, and the movable plate assembly includes a step plate 201 for receiving the arc-bending steel bar 7 from the horizontal transport mechanism 3 and transferring the arc-bending steel bar 7 from the fixed step plate 201 to the horizontal transport mechanism 3. 01 is lifted from the lowest step to the highest step of at least two movable step plates 202, at least two of the movable step plates 202 are located between at least two of the fixed step plates 201 and are arranged in parallel and spaced apart, the step inclination direction of the movable step plates 202 is the same as the step inclination direction of the fixed step plates 201, the direction of the ramp assembly is consistent with the step inclination direction of the fixed step plates 201, and the highest step of the fixed step plate 201 extends to above the operating platform 101 and is inclined toward one side of the operating platform 101.

[0036] The transmission assembly includes a mounting rod 210 for fixing at least two movable step plates 202, a rotating shaft 203 driven by the driving member 205, and an eccentric wheel 204 eccentrically fixed on the rotating shaft 203 and with its outer circumference in contact with the mounting rod 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 narrowing 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 driving member 205 includes a motor and a clutch. The motor generates power to drive the rotating shaft 203 to rotate, and the clutch combination controls the rotation frequency of the rotating shaft 203. The fixed frame also includes a lifting frame 207 located below the fixed step plate 201. In this embodiment, the number of the fixed step plates 201 is six, and the six fixed step plates 201 are fixed at intervals on the lifting frame 207. The number of the movable step plates 202 is five, and each movable step plate 202 is correspondingly arranged between two adjacent fixed step plates 201. The setting of the eccentric wheel 204 can enable the mounting rod 210 to drive the movable mounting rod 210 to move up and down regularly, and cooperate with the inclined rail assembly to take over and lift the steel bar 7 to be bent on the lower step of the fixed step plate 201 to the upper step of the fixed step plate 201, so as to deliver the steel bar 7 to be bent to the operating platform 101 for the steel bar bending operation.

[0037] The number of the eccentric wheels 204 is at least two, and at least two of the eccentric wheels 204 are fixed on the rotating shaft 203 at intervals. The mounting rod 210 is provided with at least two ear plate groups 211 corresponding to the at least two eccentric wheels 204 one by one, and the ear plate group 211 is rotatably provided with a rotating wheel for the eccentric wheels 204 to contact. In this embodiment, the number of the eccentric wheels 204 is three, and the three eccentric wheels 204 are fixed on the mounting rod 210 at intervals. The number of the ear plate groups 211 is three, and they correspond to the eccentric wheels 204 one by one. The ear plate group 211 includes two ear plates, a fixing seat, and a rotating wheel. The first ends of the two ear plates are fixed to the fixing seat together, and the fixing seat is fixed to the mounting rod 210. The rotating wheel is installed on the second ends of the two ear plates through a pin shaft, and the two ear plates are provided with openings for the pin shaft to penetrate. The eccentric wheel 204 rotates in contact with the rotating wheel, thereby reducing the friction force of the rotation of the eccentric wheel 204.

[0038] The inclined rail assembly includes a slide rail 206 fixed on the fixed frame, and a slider 209 slidably mounted on the slide rail 206, and the slider 209 is fixed on the mounting rod 210. The inclination direction of the slide rail 206 is the same as the inclination direction of the fixed step and the movable step plate 202, thereby providing a guide 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 upper step, that is, the lifting process of the movable step plate 202 has a vertical upward displacement, and also has a horizontal displacement to one side of the operating platform 101, rather than just a vertical displacement.

[0039] Preferably, Figure 8 As shown, an elbow frame 811 is provided at the bottom of the elbow main board 801, a rotating disk 807 is provided at the bottom of the movable guide column 803, and the driving member 805 is fixed on the elbow frame 811 and drives the rotating disk 807 to rotate. Further, a planetary reducer 808 is connected between the rotating disk 807 and the driving member 805. When the movable guide column 803 runs to the end of the guide groove 804, after a certain period of time, the planetary reducer controls the return speed of the movable guide column 803 to control the movable guide column 803 to move slowly when returning, so as to avoid excessive rebound force after the steel bar is bent, thereby damaging the device. The driving member 805 is a servo motor. The rotating disk 807 is located below the elbow main board 801, and the driving member 805 and the planetary reducer 808 are fixed on the elbow frame 811 and located below the rotating disk 807. In this embodiment, the guide groove 804 is in a semicircular shape outside the fixed guide column 802 , and there is an accommodation space between the guide groove 804 and the fixed guide column 802 so that the steel bar can be bent around the outer circumference of the fixed guide column 802 .

[0040] Preferably, the elbow device 8 also includes a centering device for controlling the bending inflection point of the steel bar to be bent, and the centering device includes a centering cylinder 809 fixed on the elbow frame 811, and a centering baffle 810 fixed to the front end of the centering cylinder 809 and used to resist the steel bar to be bent. The centering device starts the centering cylinder 809 under program control, pushes the centering baffle 810 to push the steel bar to a predetermined position to ensure the bending angle and the bending inflection point. Furthermore, an auxiliary positioning mechanism for assisting in positioning the bending inflection point of the elbow is also provided on the elbow main board 801, and the 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 sleeved on the movable guide post 803, and the diameter of the rotating sleeve 806 is adapted to the width of the guide groove 804. The rotating sleeve 806 can rotate independently with the central axis of the movable guide post 803, and its function is that when the steel bar is bent, the movable guide post 803 rotates with the bending process, and the sliding friction is replaced by rolling friction, thereby reducing the wear degree of the movable guide post 803 and improving the bending efficiency.

[0042] Preferably, Figure 7 , Fig. 9 and Fig.10 As shown, the operating platform includes two half-spliced ​​plates, a guide plate connecting the two half-spliced ​​plates, and a hand-cranked screw rod module 9 for controlling the two guide plates to move closer or farther away. An operating frame is provided at the bottom of the operating platform. The hand-cranked screw rod module 9 includes a movable rail fixed on the operating frame, a movable block slidably mounted on the movable rail, and the bottom of the half-spliced ​​plate is fixed to the movable block. Specifically, the movable rail is a screw rod 901, and a hand-cranked wheel 902 is fixed to the end of the screw rod 901 away from the half-spliced ​​plate. The screw rod 901 is fixed to the operating frame through two bearing seats 903. The bottom surface of the bearing seat 903 is provided with a pad 904 for fixing to the operating frame, one of which is located on one end of the screw rod 901 on the bottom surface of the half-spliced ​​plate, and the other bearing seat 903 is located on the screw rod 901 on the side close to the hand-cranked wheel 902, thereby ensuring that the screw rod 901 is in the process of rotating. It always remains in place, and the slider can move back and forth on the screw rod 901. The slider is a nut 905, which is preferably made of copper. A nut seat 906 is provided on the outer periphery of the nut 905. The nut seat 906 is fixed to the bottom of the half-spliced ​​plate. Therefore, when the hand-cranked wheel 902 is turned, the nut seat 906 can move back and forth along the screw rod 901, so that the two half-spliced ​​plates can be relatively close to each other or relatively far away from each other, and the distance between the two half-spliced ​​plates can be controlled, thereby adjusting the position of the block and further adjusting the radius of the steel bar bending arc.

[0043] Preferably, Figure 2 As shown, the horizontal transport mechanism 3 includes a conveying chain 301 for conveying the steel bar 7 to be bent to the lowest step position of the fixed step plate 201. Specifically, the horizontal conveyor includes a horizontal transport frame 302, and at least two conveying groups fixed on the horizontal transport frame 302, each of which includes at least one conveying chain 301. The conveying chain 301 can also be replaced with a conveying belt as needed. In this embodiment, the number of the conveying groups is five, and the five conveying groups are fixed on the horizontal transport frame 302 at intervals, and each conveying group includes two conveying chains 301, the two conveying chains 301 are located on the same axis, and a conveying chain 301 away from the lifting mechanism 2 is located at a position close to the lifting mechanism 2, and an inclined rod is connected between the two conveying chains 301, so that the steel bar 7 to be bent slides from a conveying chain 301 away from the lifting mechanism 2 into a conveying chain 301 close to the lifting mechanism 2, and then performs a further conveying operation. The transmission chain 301 is connected with a transmission shaft through a belt, and the transmission shaft is driven to rotate by a feeding motor. The transmission chain 301 and the transmission belt are finished product transport chains and belts of the prior art.

[0044] Preferably, 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 to the operating platform 101, and the operating platform 101 is provided with at least two longitudinal limit blocks 103 for blocking the steel bar 7 to be bent sliding down from the inclined plate 208. The longitudinal limit blocks 103 are installed on the operating platform 101 in a liftable manner, and the lowest height of the longitudinal limit blocks 103 is lower than the height of the operating platform 101. Specifically, the operating platform 101 is provided with an opening for the limit block to pass through, so that the longitudinal limit block 103 can be lifted and lowered in the hole, so as to achieve the rise to the height set at the steel bar 7 to be bent before the bending operation to block the steel bar 7 to be bent, so as to facilitate the push piece 104 to perform the centering operation on the steel bar, and when performing the bending operation, it descends into the hole of the operating platform 101 and avoids the steel bar 7 to be bent.

[0045] Preferably, the Figure 1 and Figure 7 As shown, two pushers 104 for aligning the center of the arc-shaped steel bar 7 to be bent with the arc center of the plurality of the stoppers 105 are installed on both sides of the operating platform 101, and the pushers 104 correspond to the two ends of the arc-shaped steel bar 7 to be bent on the operating platform 101. Specifically, an operating frame is provided below the operating platform 101, and support frames for installing the pushers 104 are extended from both sides of the operating frame. The pushers 104 can be hydraulic rods or electric telescopic rods, and a pusher plate is fixed at the front end of the pusher rod, so that it is easier to align the end of the arc-shaped steel bar 7 to be bent. The pusher 104 can align the center of the arc-shaped steel bar 7 to be bent with the arc center of the plurality of the stoppers 105, so as to ensure that the shape of the arc-shaped steel bar 7 to be bent is consistent.

[0046] Preferably, the Figure 1 and Figure 7As shown, the side conveyor belt assembly includes a side lifting frame 402, a side guide rail fixed on 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 rises to the highest position, the upper surface of the side conveyor belt 401 is higher than the height of the stopper 105. When the side lifting frame 402 falls to the lowest position, the upper surface of the side conveyor belt 401 is lower than the height of the operating platform 101. The movement of the side conveyor belt 401 and the side slider must be driven by a motor. A collecting rack 5 for collecting steel bars with completed bends can be set on the side of the operating platform 101 away from the lifting mechanism 2. The upper surface of the collecting rack 5 has an inclined surface for sliding the steel bars with completed bends, and the side of the collecting rack 5 away from the operating platform 101 is provided with a vertical rod for blocking the steel bars with completed bends. The side conveyor belt 401 is first lowered to the lowest height by the side lifting frame 402. After the bending of the steel bars is completed, the side conveyor belt 401 is moved to the bottom of the steel bars with completed bends through the slider 209, and the side lifting frame 402 is raised to lift the steel bars with completed bends. The side slider is moved and the side conveyor belt 401 is driven to rotate at the same time, thereby driving the steel bars with completed bends to fall into the collecting rack 5, thereby completing the collection of the steel bars with completed bends.

[0047] Furthermore, if Figure 1 and Figure 7 As shown, a side lifting frame for lifting the steel bars with completed bends can be provided on the operating platform 101. The side lifting frame can be installed on the operating platform 101 in a liftable manner. The lowest 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 the operating platform 101 or slightly higher than the operating platform 101. When the steel bars with completed bends need to be transported, the steel bars with completed bends are first lifted to a certain height by the side lifting frame, and then the side conveyor belt 401 is moved to the bottom of the steel bars with completed bends, and then the steel bars with completed bends are lowered, so that the steel bars with completed bends fall on the side conveyor belt 401, and then the steel bars with completed bends are transported and collected.

[0048] The maximum height of the side conveyor belt 401 can also be set higher than the height of the bending device, and the maximum height of the side lifting frame can be higher than the side conveyor belt 401, so that the steel bars with the bending completed can be completely lifted, and the end of the side conveyor belt 401 extends a certain distance out of the side slider, so that the side conveyor belt 401 can extend from the top of the bending device and catch the steel bars with the bending completed. After the side lifting frame is lowered, the steel bars with the bending completed will fall onto the side conveyor belt 401.

[0049] Preferably, a middle conveyor belt assembly is provided in the middle of the operating platform 101, which is used to remove the middle part of the bent finished steel bar from the operating platform 101 and is 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. A gap is opened on the side of the operating platform 101 away from the loading device for accommodating the middle guide rail. Specifically, the middle lifting frame 404 can be directly installed on the operating frame through the gap, and the operating platform 101 can also be further provided with a middle lifting frame 106 for lifting the middle part of the steel bar with the completed bend. The middle lifting frame 106 can be installed on the operating platform 101 in a liftable manner. The lowest height of the middle lifting frame 106 is lower than the height of the operating platform 101, so that the height of the middle conveyor belt 403 can be set to be flush with the operating platform 101 or slightly higher than the operating platform 101. When the steel bar with the completed bend needs to be transported, the steel bar with the completed bend is first lifted to a certain height by the middle lifting frame 106, and then the middle conveyor belt 403 is moved to the bottom of the steel bar with the completed bend, and then the steel bar with the completed bend is lowered, so that the steel bar with the completed bend falls on the middle conveyor belt 403, and then the steel bar with the completed bend is transported and collected.

[0050] On the other hand, Figures 1 to 10 As shown, the utility model also provides a steel bar multi-segment bending method using the steel bar multi-segment bending machine as described above, comprising the following steps: the horizontal transport mechanism 3 transports the arc-bending steel bar 7 to be bent toward the lifting mechanism 2 until the arc-bending steel bar 7 is located on the lifting mechanism 2; the lifting mechanism 2 lifts the arc-bending steel bar 7 until the arc-bending steel bar 7 falls onto the operating platform 101; the guide wheel 102 slides to apply force to both sides of the arc-bending steel bar 7, and a plurality of blocks 105 block the middle of the arc-bending steel bar 7 to make the arc-bending steel bar 7 The steel bar 7 is bent, and the guide wheel 102 returns to its original position; the operating platform 101 descends, so that the steel bar to be bent falls into the accommodating space between the fixed guide column 802 and the movable guide column 803, and the movable guide column 803 is driven by the driving member 805 to move along the guide groove 804, so that the steel bar to be bent is bent around the fixed guide column 802, and returns to the movable guide column 803, and the operating platform 101 is raised to lift the steel bar with the bending completed from the bending main board 801; the steel bar with the bending completed is removed from the operating platform 101 by the side conveyor belt assembly.

[0051] Specifically, when the steel bar 7 to be bent approaches the lifting mechanism 2, the driving member 205 drives the transmission assembly to rotate, and the transmission assembly controls the movable plate assembly to descend until the lowest step of the movable step plate 202 is located below the steel bar 7 to be bent, and the movable plate assembly is controlled to be lifted by the transmission assembly until the steel bar 7 to be bent is taken over from the horizontal transport mechanism 3; the driving member 205 drives the transmission assembly to rotate, and the transmission assembly controls the movable plate assembly to descend, so that the movable step plate 202 places the steel bar 7 to be bent on the lowest step of the fixed step plate 201, and the transmission assembly controls the movable plate assembly to be lifted, so that the movable step plate 202 The steel bar 7 to be bent is taken over again, and the transmission assembly controls the movable plate assembly to descend, so that the movable step plate 202 places the steel bar 7 to be bent on the upper step of the fixed step plate 201, and this process is repeated until the steel bar 7 to be bent is lifted to the highest step of the fixed step plate 201; at this time, the steel bar 7 to be bent can be stopped at a predetermined position before bending by the guidance of the inclined plate 208 and the limiting of the longitudinal limit block 103, and then the two ends of the steel bar are pushed by the pushing members 104 on both sides to align the center of the steel bar 7 to be bent with the center of the pre-bending arc line, and then the bending operation is performed by the guide wheel 102, and then the bending operation is performed.

[0052] The utility model uses an arc bending device and an elbow device to perform full-automatic multi-section bending of a steel bar, thereby solving the technical problems in the prior art that it is difficult to achieve bending of multiple sections of different diameters in the forward or reverse direction, or that the steel bar needs to be moved to another bending machine for making other curved sections. The utility model can achieve full-automatic bending of steel bars without manual operation, greatly improving the efficiency of steel bar bending, while saving labor and other machine manufacturing costs.

[0053] The parts not involved in the present utility model are the same as the prior art or can be implemented by the prior art. The above is only the preferred embodiment of the present utility model, and does not limit the present utility model in any form. Although the present utility model has been disclosed as the preferred embodiment, it is not used to limit the present utility model. Any technician familiar with this profession can make some changes or modify the technical content disclosed above to an equivalent embodiment of equivalent changes without departing from the scope of the technical solution of the present utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still belongs to the scope of the technical solution of the present utility model.

Claims

1. A multi-stage steel bar bending machine, characterized in that: include: The arc bending device comprises a liftable operating platform, a plurality of blocks 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 slidably mounted on both sides of the operating platform for applying a bending force to the steel bar to be bent; A feeding device, the feeding device comprising a horizontal transport mechanism for transporting the steel bars to be bent, and a lifting mechanism for lifting the steel bars to be bent from the horizontal transport mechanism to the operating platform, the lifting mechanism being connected between the horizontal transport mechanism and the operating platform; An elbow device, the elbow device is arranged on the side of the bending device, the elbow device comprises an elbow main board, a fixed guide column fixed on the elbow main board, a movable guide column rotating around the fixed guide column and applying a bending force to the end of the bending-completed steel bar, and a driving member driving the movable guide column to move, a guide groove for the movable guide column to move is opened on the elbow main board, and an accommodating space for accommodating the bending-completed steel bar is formed between the fixed guide column and the movable guide column; A material unloading device includes a side conveyor belt assembly for removing the bent steel bars from the operating platform, and the side conveyor belt assembly is slidably installed on both sides of the bending mechanism.

2. The steel bar multi-section bending machine according to claim 1, characterized in that: An elbow frame is provided at the bottom of the elbow main board, a rotating disk is provided at the bottom of the movable guide column, and the driving member is fixed on the elbow frame and drives the rotating disk to rotate.

3. The steel bar multi-section bending machine according to claim 2, characterized in that: The elbow device also includes a centering device for controlling the bending inflection point of the steel bar to be bent, and the centering device includes a centering cylinder fixed on the elbow frame, and a centering baffle fixed at the front end of the centering cylinder and used to resist the steel bar to be bent.

4. The steel bar multi-section bending machine according to claim 1, characterized in that: A rotating sleeve is rotatably sleeved on the movable guide column, and the diameter of the rotating sleeve is matched with the width of the guide groove.

5. The steel bar multi-section bending machine according to claim 1, characterized in that: The operating platform includes two half-spliced ​​plates, a guide plate connecting the two half-spliced ​​plates, and a hand-cranked screw module for controlling the two guide plates to move closer or further away. An operating frame is provided at the bottom of the operating platform. The hand-cranked screw module includes a moving rail fixed on the operating frame and a moving block slidably installed on the moving rail. The bottom of the half-spliced ​​plate is fixed to the moving block.

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

7. The steel bar multi-section bending machine according to claim 1, characterized in that: Two pushing members for aligning the center of the steel bar to be bent with the arc center of the plurality of blocking blocks are installed on both sides of the operating platform, and the pushing members correspond to the two ends of the steel bar to be bent on the operating platform.

8. The steel bar multi-section bending machine according to claim 1, characterized in 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 installed on the side guide rail, and a side conveyor belt installed on the side slider. When the side lifting frame rises to the highest position, the upper surface of the side conveyor belt is higher than the height of the stopper. When the side lifting frame falls to the lowest position, the upper surface of the side conveyor belt is lower than the height of the operating platform.

9. The steel bar multi-section bending machine according to claim 1, characterized in that: A middle conveyor belt assembly is provided in the middle of the operating platform, which is used to remove the middle part of the bent steel bar from the operating platform and is 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. A gap is provided on the side of the operating platform away from the feeding device for accommodating the middle guide rail.

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