Steel bar bending machine

Abstract

The embodiment of the present invention discloses a steel bar hoop bending machine, comprising a frame and a main bending mechanism and a secondary bending mechanism, both of which are provided with a bending device and an automatic change pin block plate device, the bending device comprises a position-changing bending pin, a bending turntable is mounted on the position-changing bending pin and can rotate around the bending pin, the bending turntable is provided with a rotating bending pin, and a two-way oil cylinder drives the bending turntable to rotate forward and reversely; the automatic change pin block plate device comprises a station-changing rotating seat, a pin block plate is connected to the station-changing rotating seat, the station-changing rotating seat is connected with an automatic change tension mechanism to realize rotation, the bending device is connected with a sequential opener, the sequential opener is provided with an extendable locking plate, the locking plate is used to limit the rotation of the station-changing rotating seat; the station-changing rotating seat is provided with a reset passive impact block; the main bending mechanism is also provided with a secondary pin block plate, and the two bending mechanisms can be used to complete the bending operation of the five bending corners of the hoop skeleton frame, the bending process is fully automated, the production efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of steel bar hoop bending machines, in particular to a steel bar hoop bending machine with a double bending device. Background Art

[0002] In modern construction projects, a large number of various steel bars and stirrups obtained from steel bars are used. Steel bars are usually stored and transported in coils. Before use, they must be straightened, cut to length, and then bent multiple times by a hydraulic steel bar bending machine to form stirrups. Stirrups are mainly used to fix the position of the main steel bars and make the various steel bars inside the building components form a steel bar skeleton. Stirrups used in construction have various shapes and are widely used. The most common one is a stirrup skeleton frame bent into a rectangle. The stirrup skeleton frame has five corners (refer to Fig.17 ), and the bending angles at the head and tail overlap, it is necessary to stagger the bending angles at the head and tail of the stirrup skeleton frame.

[0003] In the bending and forming of the stirrup skeleton frame, since it is necessary to avoid the bent steel bars, the existing steel bar stirrup bending machines are very large in size and are equipped with multiple bending devices. The steel bars need to be moved multiple times to complete the bending of five corners. There are defects such as complex structure, large size, and low production efficiency, which need to be improved. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, an embodiment of the present invention provides a steel bar hoop bending machine, which can complete five bending angles by using two bending devices, has a small size and high production efficiency.

[0005] The technical solution adopted by the embodiment of the present invention to solve the technical problem is:

[0006] A steel bar hoop bending machine comprises a frame, and a bending mechanism connected to the frame, the bending device comprises a main bending mechanism and a secondary bending mechanism, the main bending mechanism and the secondary bending mechanism are both provided with a bending device and an automatic shifting pin plate device, the bending device comprises a shifting bending pin, a bending turntable and a bidirectional oil cylinder, the bending turntable is mounted on the shifting bending pin and can rotate around the bending pin, the bending turntable is provided with a rotating bending pin that cooperates with the shifting bending pin, the bidirectional oil cylinder is connected to the bending turntable and drives the bending turntable to rotate in the forward and reverse directions; the automatic shifting pin plate device The pin plate device includes a station conversion rotating seat rotatably connected to the position-changing bending pin, a pin stop plate is connected to the station conversion rotating seat, the station conversion rotating seat is connected to an automatic change tension mechanism to realize rotation, the bending device is connected to a sequential opener, the sequential opener is provided with an extendable locking plate, and the locking plate is used to limit the rotation of the station conversion rotating seat; the station conversion rotating seat is provided with a reset passive impact block for promoting its own reset; the main bending mechanism is also provided with a secondary pin stop plate arranged opposite to the automatic change pin stop plate device.

[0007] As an improvement of the above technical solution, the automatic tension change mechanism includes a guide rope and a traction spring, one end of the guide rope is connected to the workstation change rotating seat, and the other end is connected to the traction spring, and the traction spring provides tension.

[0008] As a further improvement of the above technical solution, the main bending mechanism is provided with an avoidance displacement rotating seat, the avoidance displacement rotating seat is connected with an avoidance rotating shaft, an adjustment seat is fixed on the avoidance rotating shaft, and the auxiliary pin stop plate is fixedly connected to the adjustment seat.

[0009] Further improvement, the bending device of the main bending mechanism is installed on a superimposed slide, the superimposed slide is slidably connected to a fixed bracket, the fixed bracket is fixedly connected to the frame, the superimposed slide is connected to a conversion device for pushing the displacement bending pin to extend, and the displacement bending pin is used to bend the steel bar and is provided with a partition support at one end.

[0010] Further improvement, the conversion device includes a bent offset rack fixed on the superimposed slide and an offset slide connected to the fixed bracket, the offset slide is connected to an offset gear and a slidable coaxial offset rack, the bent offset rack and the coaxial offset rack are both engaged with the offset gear, the coaxial offset rack is provided with a pushing part for pushing the displacement bending pin, the offset slide is connected to a rotatable one-way locking plate, the one-way locking plate is connected to a torsion spring, under the action of the torsion spring, the free end of the one-way locking plate is kept pressed against the displacement bending pin.

[0011] As a further improvement, a return spring is mounted on the displacement bending pin, and two ends of the return spring are respectively connected to the dislocation sliding seat and the displacement bending pin to push the displacement bending pin to return to its original position.

[0012] According to a further improvement, a material shifting device for shifting the steel bars is arranged between the main bending mechanism and the auxiliary bending mechanism, and the material shifting device includes a material shifting slide, a material shifting shaft and a material shifting cylinder connected to the frame, a slidable material shifting trolley is connected to the material shifting slide, a material shifting shaft is connected to a material shifting pulley, a first pull rope is wound around the material shifting pulley, the first pull rope is connected to the material shifting pulley, and the material shifting pulley rotates, and the material shifting pulley is driven to move by the first pull rope, and the material shifting cylinder is connected to the material shifting pulley and drives the material shifting pulley to rotate.

[0013] As a further improvement, the material shifting rope wheel is provided with a coaxial transmission rope wheel, a second pull rope is wound around the transmission rope wheel, and the second pull rope is connected to the material shifting oil cylinder and driven by the material shifting oil cylinder.

[0014] As a further improvement, the piston rod of the material shifting cylinder is connected to a rope pull seat, and both ends of the second pull rope are fixed on the rope pull seat.

[0015] As a further improvement, the material dispensing device also includes a fixed-length remote control switch, which is used to control the start and stop of the material dispensing cylinder. A fixed-length impact block for triggering the fixed-length remote control switch is arranged on the piston rod of the material dispensing cylinder. The fixed-length remote control switch is connected to a fixed-length sliding bracket, and the fixed-length sliding bracket is provided with a slide groove parallel to the piston rod of the material dispensing cylinder. A fixed-length adjustment impact block cooperating with the fixed-length impact block is arranged in the slide groove, and the fixed-length adjustment impact block is used to trigger the fixed-length remote control switch.

[0016] One of the above technical solutions has the following beneficial effects: the main bending mechanism and the auxiliary bending mechanism are connected on the frame, both of which are provided with a bending device and an automatic conversion pin stop plate device, the bidirectional oil cylinder of the bending device drives the bending turntable to rotate forward and reversely, and the rotation of the bending pin and the displacement of the bending pin can realize bending in two directions and at multiple angles; the locking piece of the sequential opener extends out of the limited station conversion rotating seat, the pin stop plate is located at the first station, and the bending operation of the first bending angle of the steel bar is performed; then, the locking piece is retracted, and the station conversion rotating seat rotates under the pull of the automatic conversion tension mechanism. The pin plate is located at the second workstation to bend the second corner of the steel bar; after the main bending mechanism and the auxiliary bending mechanism have completed the bending of the first corner, the steel bar moves downward, and the main bending mechanism and the auxiliary bending mechanism complete the bending of the second corner. Finally, the main bending mechanism cooperates with the auxiliary pin plate to complete the bending of the fifth corner to produce a complete stirrup skeleton frame. The two bending mechanisms can fully automate the bending of the five corners of the stirrup skeleton frame, which greatly simplifies the structure of the steel bar bending machine, reduces the volume, improves production efficiency, and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 is a structural schematic diagram according to an implementation mode;

[0019] Figure 2 to Figure 5 is a schematic diagram of a use state according to an embodiment;

[0020] Figure 6 , Figure 7 is a schematic structural diagram of a main bending mechanism according to an embodiment;

[0021] Figure 8 , Fig. 9 is a schematic structural diagram of a conversion device according to an embodiment;

[0022] Fig.10is a schematic structural diagram of an automatic pin-changing device according to an embodiment;

[0023] Fig.11 It is a structural schematic diagram of the avoidance displacement rotating seat part according to one embodiment;

[0024] Fig.12 , Fig.13 is a schematic structural diagram of a material-diverting device according to an embodiment;

[0025] Fig.14 A schematic diagram of a pull rope connection relationship of a material diverting device according to an embodiment;

[0026] Fig.15 , Fig.16 is a schematic structural diagram of a secondary bending mechanism according to an embodiment;

[0027] Fig.17 It is a schematic diagram of the structure of the stirrup skeleton frame. DETAILED DESCRIPTION

[0028] Reference Figures 1 to 16An embodiment of the present invention provides a steel bar bending machine, including a frame 100, and a bending mechanism connected to the frame, the bending device includes a main bending mechanism 110 and an auxiliary bending mechanism 120, the main bending mechanism 110 and the auxiliary bending mechanism 120 are both provided with a bending device 200 and an automatic change pin plate device 300, the bending device 200 includes a displacement bending pin 210, a bending turntable 220 and a bidirectional oil cylinder 230, the bending turntable 220 is mounted on the displacement bending pin 210 and can rotate around the bending pin 210, the bending turntable 2 20 is provided with a rotating bending pin 221 that cooperates with the displacement bending pin 210, and the bidirectional oil cylinder 230 is connected to the bending turntable 220 and drives the bending turntable 220 to rotate forward and reversely; the automatic change pin stop plate device 300 includes a station change rotating seat 310 that is rotatably connected to the displacement bending pin 210, and the station change rotating seat 310 is connected with a pin stop plate 320, and the pin stop plate 320 is provided with a support column, and a slidable adjustment sleeve 321 is sleeved on the outside of the support column, and the adjustment sleeve 321 is connected with a locking component to fix the support column. By adjusting the relative position of the adjustment sleeve 321 and the support column, the height of the pin stop plate 320 can be adjusted to expand the scope of use. Preferably, the adjustment sleeve 321 is fixedly connected with a rotating shaft, and the station change rotating seat 310 is provided with a shaft sleeve 312 that cooperates with the installation of the rotating shaft. With the above structure, the working surface angle of the pin stop plate 320 can be adjusted by the rotating shaft to expand the scope of use. Preferably, the end of the rotating shaft passes through the station conversion rotating seat 310 and is connected to a rotating torsion spring. Under the action of the rotating torsion spring, the pin block plate 320 maintains a working state. The rotating torsion spring stabilizes the structure on the one hand, ensuring that the pin block plate 320 maintains a reliable working state, and on the other hand, provides an adjustable space for the pin block plate 320. The station conversion rotating seat 310 is connected to an automatic conversion tension mechanism 330 to achieve rotation. The bending device 200 is connected to a sequential opener 400, and the sequential opener 400 is provided with an extendable locking plate 410, and the locking plate 410 is used to limit the rotation of the station conversion rotating seat 310; the station conversion rotating seat 310 is provided with a reset passive collision block 311 for promoting its own reset; the main bending mechanism 110 is also provided with a secondary pin block plate 500 arranged opposite to the automatic conversion pin block plate device 300. With the above structure, after the main bending mechanism 110 and the auxiliary bending mechanism 120 complete the bending of the first corner, the steel bar moves downward, and then the main bending mechanism 110 and the auxiliary bending mechanism 120 complete the bending operation of the second corner. Finally, the main bending mechanism 110 cooperates with the auxiliary stop pin plate 500 to complete the bending operation of the fifth corner, and a complete stirrup skeleton frame is produced. The two bending mechanisms can be used to fully automatically complete the bending operation of the five corners of the stirrup skeleton frame, which greatly simplifies the structure of the steel bar bending machine, reduces the volume, improves production efficiency, and reduces costs.

[0029] In this embodiment, preferably, the automatic tension change mechanism 330 includes a guide rope 331 and a traction spring 332. One end of the guide rope 331 is connected to the station change rotating seat 310, and the other end is connected to the traction spring 332. The traction spring 332 provides tension. In order to ensure the smooth movement of the guide rope 331, a rope winding groove and a guide wheel are provided on the station change rotating seat 310. The guide rope 331 is partially wound around the rope winding groove and guided by the guide wheel and then connected to the traction spring 332. The traction spring 332 provides tension to ensure that the automatic tension change mechanism 330 can pull the station change rotating seat 310 to rotate. The structure is simple and reliable, and the cost is low.

[0030] In this embodiment, preferably, the main bending mechanism 110 is provided with an avoidance displacement rotating seat 510, the avoidance displacement rotating seat 510 is connected with an avoidance rotating shaft, an adjustment seat 520 is fixed on the avoidance rotating shaft, and the auxiliary stop pin plate 500 is fixedly connected to the adjustment seat 520. The auxiliary stop pin plate 500 is used to bend the steel bar downward (the fifth bending angle), and in order to avoid interfering with the rotating bending pin 221, the auxiliary stop pin plate 500 can rotate to avoid the rotating bending pin 221 through the avoidance rotating shaft, and the structure is compact. Preferably, the avoidance rotating shaft is provided with an avoidance torsion spring 530, and under the action of the avoidance torsion spring 530, the auxiliary stop pin plate 500 maintains a working state.

[0031] In this embodiment, preferably, the bending device 200 of the main bending mechanism 110 is installed on a superimposed slide 240, the superimposed slide 240 is slidably connected to a fixed bracket 250, the fixed bracket 250 is fixedly connected to the frame 100, the superimposed slide 250 is connected with a conversion device for pushing the displacement bending pin 210 to extend, and the displacement bending pin 210 is provided with a separation support 211 at one end for bending the steel bar. Before bending the fifth bend, the conversion device pushes the displacement bending pin 210 to extend forward, and the separation support 211 of the coaxial displacement bending pin 210 pushes and deforms the bend angle of one end of the steel bar to stagger; then the displacement bending pin 210 is used to bend the fifth bend, and one bending pin completes the bending of multiple angles of the stirrup, and realizes the staggered bend angles of the head and tail of the stirrup skeleton frame, which greatly speeds up the production operation speed, is conducive to reducing costs, and simplifies the structure of the steel bar bending machine.

[0032] In this embodiment, preferably, the conversion device includes a bent offset rack 241 fixed on the superimposed slide 240 and an offset slide 251 connected to the fixed bracket 250, the offset slide 251 is connected to an offset gear 252 and a slidable coaxial offset rack 253, the bent offset rack 241 and the coaxial offset rack 253 are both engaged with the offset gear 252, the coaxial offset rack 253 is provided with a pushing portion for pushing the displacement bending pin 210, the offset slide 251 is connected to a rotatable one-way locking plate 254, the one-way locking plate 254 is connected to a torsion spring, and under the action of the torsion spring, the free end of the one-way locking plate 254 is kept pressed against the displacement bending pin 210. When the stacking slide 240 retreats, the bent offset rack 241 pushes the coaxial offset rack 253 forward through the offset gear 252, and the pushing part of the coaxial offset rack 230 pushes the displacement bending pin 210 to extend forward, and the one-way locking plate 254 is used to lock the extended state of the displacement bending pin 210. Of course, the stacking slide 240 can adopt a variety of driving methods. In this embodiment, one method is provided, in which the fixed bracket 250 is fixedly connected to the stacking conversion cylinder 700, and the stacking slide 240 is connected to the piston rod of the stacking conversion cylinder 700. The stacking slide 240 is driven by the stacking conversion cylinder 700 to slide, and the structure is simple and reliable.

[0033] In this embodiment, preferably, a reset spring 212 is mounted on the displacement bending pin 210, and the two ends of the reset spring 212 are respectively connected to the dislocation slide 251 and the displacement bending pin 210 to push the displacement bending pin 210 to reset. The one-way locking piece 254 is connected to a foot switch through a cable to realize opening. After the bending operation is completed, the one-way locking piece 254 is released, and the displacement bending pin 210 is automatically reset under the push of the reset spring 212, and is ready for the next bending operation.

[0034] In this embodiment, preferably, a material shifting device 600 for shifting the steel bars is arranged between the main bending mechanism 110 and the auxiliary bending mechanism 120, and the material shifting device 600 includes a material shifting slide 610 connected to the frame 100, a material shifting shaft 620 and a material shifting cylinder 630, the material shifting slide 610 is connected to a slidable material shifting trolley 611, the material shifting shaft 620 is connected to a material shifting pulley 621, a first pull rope 622 is wound around the material shifting pulley 621, the first pull rope 622 is connected to the material shifting pulley 611, and the material shifting pulley 621 rotates, and the material shifting pulley 611 is driven to move by the first pull rope material shifting pulley 622, and the material shifting cylinder 630 is connected to the material shifting pulley 621 and drives the material shifting pulley 621 to rotate. The working principle is as follows: the material-discharging cylinder 630 drives the material-discharging rope wheel 621 to rotate, and the material-discharging rope wheel 621 drives the first pull rope 622 wound thereon to move through friction, and the first pull rope 622 pulls the material-discharging pulley 611 to move to push the steel bar downward. The oil cylinder is used as a power device, which has a large pulling force, adapts to the use environment of the steel bar bending machine, and is reliable and durable. In one embodiment, the material-discharging pulley 611 and the material-discharging slide 610 are provided with two groups and arranged in parallel. The two material-discharging slides 610 are respectively close to the main bending mechanism 110 and the auxiliary bending mechanism 120. Each of the material-discharging pulleys 611 is connected to a first pull rope 622, and the material-discharging rope wheel 621 is correspondingly provided with two. The use of two material-discharging pulleys 611 corresponds to the two angular positions after the first bending of the steel bar, which is conducive to the smooth promotion of the steel bar to move, more uniform force, and more stable steel bar movement. Preferably, a horizontal slide rail is provided on the frame 100, and the material-discharging slide 610 and the auxiliary bending mechanism 120 are slidably connected to the horizontal slide rail, and the position can be adjusted to adapt to different specifications of the hoop frame frame, thereby improving the scope of use. In order to ensure that the two material-discharging pulleys 611 move synchronously, the two material-discharging rope wheels 621 are installed on the same material-discharging rotating shaft 620, and the material-discharging rotating shaft 620 is provided with a shaft section with a square cross section, and the two material-discharging rope wheels 621 are fixed on the shaft section. The square shaft section is used for transmission to ensure that the two material-discharging rope wheels 621 rotate synchronously, thereby ensuring that the two material-discharging pulleys 611 move synchronously, and it is convenient for the material-discharging rope wheels 621 to move with the material-discharging slide 610.

[0035] In this embodiment, preferably, the material shifting rope wheel 621 is provided with a coaxial transmission rope wheel 623 , and a second pull rope 624 is wound around the transmission rope wheel 623 . The second pull rope 624 is connected to the material shifting oil cylinder 630 and is driven by the material shifting oil cylinder 630 .

[0036] The preferred implementation effect is that the piston rod of the material-discharging cylinder 630 is connected to a guide rope seat 640, and both ends of the second pull rope 624 are fixed to the guide rope seat 640. The second pull rope 624 can be turned and guided by multiple guide wheels, which is a common design and will not be described in detail. The guide rope seat 640 is driven by the material-discharging cylinder 630 to move, driving the second pull rope 624 to move, and the second pull rope 624 drives the transmission rope wheel 623 and the material-discharging rope wheel 621 to rotate through friction, and finally the material-discharging pulley 611 pushes the steel bar to move.

[0037] In this embodiment, preferably, the material dispensing device 600 also includes a fixed-size remote control switch 650, which is used to control the start and stop of the material dispensing cylinder 630. A fixed-size impact block 631 for triggering the fixed-size remote control switch 650 is provided on the piston rod of the material dispensing cylinder 630. The fixed-size remote control switch 650 is connected to a fixed-size sliding bracket 651, and the fixed-size sliding bracket 651 is provided with a slide groove parallel to the piston rod of the material dispensing cylinder 630. A fixed-size adjustment impact block 652 cooperating with the fixed-size impact block 631 is provided in the slide groove, and the fixed-size adjustment impact block 652 is used to trigger the fixed-size remote control switch 650. The fixed-length adjustment block 652 can be moved and fixed in the slide groove, and common bolts and nuts can be used. Other methods will not be repeated. When the material-discharging cylinder 630 is actuated, the fixed-length adjustment block 631 hits the fixed-length adjustment block 652 and triggers the fixed-length remote control switch 650 to control the material-discharging cylinder 630 to stop.

[0038] The above is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments. As long as the technical effects of the present invention are achieved by any same or similar means, they should fall within the protection scope of the present invention.

Claims

1. A steel bar hoop bending machine, comprising a frame (100) and a bending device connected to the frame, characterized in that: The bending device comprises a main bending mechanism (110) and a secondary bending mechanism (120), and the main bending mechanism (110) and the secondary bending mechanism (120) are both provided with a bending device (200) and an automatic change-over pin-blocking plate device (300). The bending device (200) comprises a displacement bending pin (210), a bending turntable (220), and a bidirectional oil cylinder (230). The bending turntable (220) is sleeved on the displacement bending pin (210) and can rotate around the displacement bending pin (210). The pin (210) rotates, the bending turntable (220) is provided with a rotating bending pin (221) matched with the position-changing bending pin (210), the bidirectional oil cylinder (230) is connected to the bending turntable (220) and drives the bending turntable (220) to rotate in the forward and reverse directions; the automatic change pin-blocking plate device (300) comprises a station change rotating seat (310) rotatably connected to the position-changing bending pin (210), and a stopper is connected to the station change rotating seat (310). The workstation conversion rotating seat (310) is provided with a pin plate (320), the workstation conversion rotating seat (310) is connected with an automatic conversion tension mechanism (330) to realize rotation, the bending device (200) is connected with a sequential opener (400), the sequential opener (400) is provided with an extendable locking piece (410), the locking piece (410) is used to limit the rotation of the workstation conversion rotating seat (310); the workstation conversion rotating seat (310) is provided with a reset passive impact for promoting its own reset block (311); the main bending mechanism (110) is also provided with a secondary pin block plate (500) arranged opposite to the automatic change pin block plate device (300); the automatic change tension mechanism (330) includes a guide rope (331) and a traction spring (332); one end of the guide rope (331) is connected to the station change rotating seat (310), and the other end is connected to the traction spring (332), and the traction spring (332) provides the tension.

2. A steel bar bending machine according to claim 1, characterized in that: The main bending mechanism (110) is provided with an avoidance displacement rotating seat (510), a avoidance rotating shaft is connected to the avoidance rotating seat (510), an adjustment seat (520) is fixed on the avoidance rotating shaft, and the auxiliary stop pin plate (500) is fixedly connected to the adjustment seat (520).

3. A steel bar hoop bending machine according to claim 1, characterized in that: The bending device (200) of the main bending mechanism (110) is installed on a superimposed slide (240), and the superimposed slide (240) is slidably connected to a fixed bracket (250), and the fixed bracket (250) is fixedly connected to the frame (100). The superimposed slide (240) is connected to a conversion device for pushing the displacement bending pin (210) to extend, and a separation support plate (211) is provided at one end of the displacement bending pin (210) for bending the steel bar.

4. A steel bar bending machine according to claim 3, characterized in that: The conversion device comprises a bent misaligned rack (241) fixed on the superposition slide (240) and a misaligned slide (251) connected to the fixed bracket (250); the misaligned gear (252) and a slidable coaxial misaligned rack (253) are connected to the misaligned slide (251); the bent misaligned rack (241) and the coaxial misaligned rack (253) are both meshed with the misaligned gear (252); the coaxial misaligned rack (253) is provided with a pushing portion for pushing the displacement bending pin (210); the misaligned slide (251) is connected with a rotatable one-way locking plate (254); the one-way locking plate (254) is connected with a torsion spring, and under the action of the torsion spring, the free end of the one-way locking plate (254) is kept pressed against the displacement bending pin (210).

5. A steel bar hoop bending machine according to claim 4, characterized in that: A return spring (212) is sleeved on the displacement bending pin (210), and two ends of the return spring (212) are respectively connected to the dislocation sliding seat (251) and the displacement bending pin (210) to push the displacement bending pin (210) to return to its original position.

6. A steel bar hoop bending machine according to claim 1, characterized in that: A material shifting device (600) for shifting steel bars is arranged between the main bending mechanism (110) and the auxiliary bending mechanism (120), wherein the material shifting device (600) comprises a material shifting slide (610) connected to the frame (100), a material shifting shaft (620) and a material shifting oil cylinder (630), wherein a slidable material shifting pulley (611) is connected to the material shifting slide (610), and a slidable material shifting pulley (611) is connected to the material shifting shaft (620). A material shifting rope wheel (621) is connected, a first pull rope (622) is wound around the material shifting rope wheel (621), the first pull rope (622) is connected to the material shifting pulley (611), and when the material shifting rope wheel (621) rotates, the material shifting pulley (611) is driven to move by the first pull rope (622), and the material shifting oil cylinder (630) is connected to the material shifting rope wheel (621) and drives the material shifting rope wheel (621) to rotate.

7. A steel bar hoop bending machine according to claim 6, characterized in that: The material shifting rope wheel (621) is provided with a coaxial transmission rope wheel (623), and a second pull rope (624) is wound around the transmission rope wheel (623). The second pull rope (624) is connected to the material shifting oil cylinder (630) and driven by the material shifting oil cylinder (630).

8. A steel bar hoop bending machine according to claim 7, characterized in that: The piston rod of the material-moving oil cylinder (630) is connected to a rope-transferring seat (640), and both ends of the second pull rope (624) are fixed on the rope-transferring seat (640).

9. A steel bar hoop bending machine according to claim 8, characterized in that: The material shifting device (600) further comprises a fixed-length remote control switch (650), wherein the fixed-length remote control switch (650) is used to control the start and stop of the material shifting oil cylinder (630); a fixed-length collision block (631) for triggering the fixed-length remote control switch (650) is arranged on the piston rod of the material shifting oil cylinder (630); the fixed-length remote control switch (650) is connected to a fixed-length sliding bracket (651); the fixed-length sliding bracket (651) is provided with a sliding groove parallel to the piston rod of the material shifting oil cylinder (630); a fixed-length adjustment collision block (652) matched with the fixed-length collision block (631) is arranged in the sliding groove; the fixed-length adjustment collision block (652) is used to trigger the fixed-length remote control switch (650).

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