Steel bar bender

Abstract

The utility model discloses a steel bar bender which comprises a machine base, a disc is arranged on the right side of the top of the machine base, a center shaft is fixedly installed in the center of the top of the disc, a driving motor with an output shaft fixedly connected with the bottom of the disc is fixedly embedded in the bottom of the machine base, and a bending shaft located on the front side of the center shaft is arranged on the top of the disc. Through the arrangement of a series of structures, the top of a steel bar can be shielded and limited in the bending process of the steel bar, the risk that the steel bar tilts upwards in the bending process can be effectively reduced, the bending quality of the steel bar is improved, the limiting block and the bending shaft are adjustable in position, the steel bar bending device can be suitable for steel bars of different specifications, and the practicability is high. And when the other section of the reinforcing steel bar needs to be bent, the clamped and fixed reinforcing steel bar can be directly and transversely driven to move, the reinforcing steel bar does not need to be independently disassembled and fixed by personnel, and personnel operation is facilitated.

Description

Technical Field

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

[0002] The steel bar bending machine mainly includes a frame, on which a working disk is rotatably connected, and the working disk is rotated by a motor. A central axis and a bending axis are installed on the working disk, and the central axis is fixed at the center of the working disk. When bending, the steel bar is placed between the central axis and the bending axis. When the working disk rotates, the steel bar can be bent. For example, application number: 202020255546.2 discloses a steel bar bending machine, which includes a steel bar bending machine, including a placing table, a main turntable is arranged on the upper surface of the placing table, and a rotating column is arranged vertically through the center of the main turntable. The bottom end of the rotating column passes through the placing table and is fixedly connected to the placing table. A clamping assembly is fixed on the top of the main turntable through which the rotating column passes. A driving assembly is connected to the main turntable on the placing table. The driving assembly drives the main turntable to rotate. A plurality of shaft holes are opened on the upper surface of the main turntable. A shaft core adapted thereto is inserted in the shaft holes. The clamping assembly is fixedly connected to the rotating column through a supporting frame. The clamping assembly includes a clamping block and an adjusting member arranged relatively to each other. The adjusting member drives the clamping blocks to move closer to or farther from each other. The device has the effect of being able to adapt to different specifications of steel bars to be bent and firmly clamping them to be bent.

[0003] The rebar bending machine disclosed in the above patent fixes the rebar by means of a clamping assembly, and at the same time cooperates with the main turntable to drive the shaft core to rotate to bend the rebar. However, there are still some shortcomings in its use: 1. In the process of bending the rebar, there is a lack of a structure to restrict the rebar at the bending end. In the process of squeezing and bending the rebar, the rebar is prone to curl upward, thereby affecting the quality of the rebar bending; 2. After the rebar is clamped and fixed, when the bending position of the rebar needs to be adjusted, it is necessary to release the fixation of the rebar, adjust the rebar and then fix it. This back-and-forth adjustment and fixing method is cumbersome to operate and cannot meet the use requirements. Based on the above situation, we propose a rebar bending machine. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and provides a steel bar bending machine.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A steel bar bending machine comprises a machine base, a disc is provided on the top right side of the machine base, a central shaft is fixedly installed at the center position of the top of the disc, a driving motor is embedded and fixed with an output shaft and fixedly connected to the bottom of the disc at the bottom of the machine base, a bending shaft is provided on the top of the disc in front of the central shaft, the steel bars are bent by the bending shaft, a first threaded driving mechanism is installed on the top of the disc, the top of the first threaded driving mechanism is fixedly connected to the bottom end of the bending shaft, the setting of the first threaded driving mechanism can adjust the lateral position of the bending shaft, so that it can be suitable for steel bars of different specifications, a limiting block is movably contacted on the rear side of the bending shaft, a plurality of balls are embedded at the bottom of the limiting block, the limiting block and the balls cooperate to limit the top of the steel bar, the top of the limiting block is connected to the bending shaft A second threaded drive mechanism is installed between the top ends of the shafts, and the second threaded drive mechanism is used to adjust the vertical position of the limiting block. A clamping and fixing mechanism that is in movably contact with the top of the machine base is provided on the left side of the disc, and the clamping and fixing mechanism is used to clamp and fix the steel bars. Two first L-shaped guide rods are fixedly connected to the left side of the clamping and fixing mechanism, and a support seat is fixedly connected to the left side of the top of the machine base, and the support seat is slidably sleeved on the two first L-shaped guide rods, and the first L-shaped guide rods have a lateral guiding effect on the clamping and fixing mechanism. Multi-stage electric telescopic rods are fixedly installed on the front and rear sides of the support seat, and the output shaft ends of the two multi-stage electric telescopic rods are respectively fixedly installed on the front and rear sides of the clamping and fixing mechanism, and the multi-stage electric telescopic rods are used to adjust the lateral position of the clamping and fixing mechanism.

[0007] Preferably, the first threaded driving mechanism includes a moving block, a first groove with an opening on the front side is opened on the top of the disc, the moving block is slidably installed on the bottom inner wall of the first groove, the top of the moving block is fixedly connected to the bottom end of the bending shaft, a first screw is rotatably installed on the rear inner wall of the first groove, the front end of the first screw extends to the front side of the disc and is fixedly connected with a knob, the moving block is threadedly sleeved on the first screw, and the moving block is threadedly connected to the first screw in such a way that the moving block can be driven to move laterally while the first screw rotates.

[0008] Preferably, the second threaded drive mechanism includes an L-shaped moving rod, the bottom end of the L-shaped moving rod is fixedly connected to the top of the limiting block, a rectangular groove is opened at the top of the pressure bending shaft, a rectangular rod is slidably sleeved in the rectangular groove, the top end of the rectangular rod extends to the top of the pressure bending shaft and is fixedly connected to the top inner wall of the L-shaped moving rod, a second screw is rotatably installed on the bottom inner wall of the rectangular groove, the top end of the second screw extends to the top of the L-shaped moving rod and is fixedly connected to a rotating rod, the rectangular rod is threadedly sleeved on the second screw, and the second screw and the rectangular rod are threadedly connected in such a way that the rectangular rod can be driven to move vertically while the second screw rotates, and the L-shaped moving rod is sleeved on the second screw.

[0009] Preferably, the clamping and fixing mechanism includes a U-shaped seat that is in movably contact with the top of the machine base, the left side of the U-shaped seat is fixedly connected to the right ends of the two first L-shaped guide rods, and two clamping plates are arranged in the U-shaped seat, and the sides of the two clamping plates that are close to each other are both arranged as arc-shaped structures and are bonded and fixed with anti-skid rubbers, and the steel bars are clamped and fixed by the cooperation of the two clamping plates and the two anti-skid rubbers, and the setting of the anti-skid rubber can effectively reduce the slipping during the clamping and fixing process, and the sides of the two clamping plates that are away from each other are rotatably installed with T-shaped screws, and the two T-shaped screws The sides of the rods that are away from each other extend outside the U-shaped seat, and the U-shaped seat is threadedly sleeved on the two T-shaped screws. The sides of the two clamps that are away from each other are fixedly connected with the second L-shaped guide rods, and the U-shaped seat is slidably sleeved on the two second L-shaped guide rods. The second L-shaped guide rods have a lateral guiding effect on the corresponding clamps. The front and rear sides of the U-shaped seat are fixedly connected with connecting blocks, and the left sides of the two connecting blocks are respectively fixedly connected to the right ends of the output shafts of the corresponding multi-stage electric telescopic rods, and the connection between the multi-stage electric telescopic rod and the U-shaped seat is realized through the connecting blocks.

[0010] Preferably, a T-shaped slide rail is fixedly connected to the bottom inner wall of the first groove, and a T-shaped slide groove with openings on the front and rear sides is provided at the bottom of the moving block. The T-shaped slide rail is slidably connected to the T-shaped slide groove, and the T-shaped slide rail has a lateral guiding effect on the moving block. A first threaded hole is provided on the front side of the moving block, and the first threaded hole is threadedly connected to the first screw.

[0011] Preferably, a avoidance hole with an open top is provided on the right side of the support seat, and the avoidance hole is used for allowing steel bars to pass through.

[0012] Preferably, a second threaded hole and a first guide hole are provided on the front inner wall and the rear inner wall of the U-shaped seat, the second threaded hole is threadedly connected to the corresponding T-shaped screw, and the inner wall of the first guide hole is slidably mounted on the outer side of the corresponding second L-shaped guide rod.

[0013] Compared with the existing technology, the beneficial effects of the utility model are:

[0014] 1. The steel bars can be bent by driving the motor, the center shaft and the bending shaft;

[0015] 2. By setting the first threaded drive mechanism, the lateral position of the compression bending axis can be adjusted, so that it can be applied to steel bars of different specifications, thereby improving the scope of application;

[0016] 3. Through the cooperation of the second threaded drive mechanism, the limiting block and the ball, the top of the steel bar can be blocked and limited during the bending process, so that the steel bar will not bend upward during the bending process, reducing the risk of damage during the bending process and improving the quality of the steel bar bending. The position of the limiting block can be adjusted, which can be applied to limit steel bars of different specifications and improve the scope of application;

[0017] 4. Through the setting of multi-stage electric telescopic rods, when it is necessary to bend another section of the steel bar, the clamped steel bar can be directly driven to move horizontally, without the need for personnel to remove the steel bar separately and then fix it, which is convenient for personnel to operate;

[0018] The utility model can block and limit the top of the steel bar during the bending process through the arrangement of a series of structures, which can effectively reduce the risk of the steel bar tilting upward during the bending process and improve the quality of the steel bar bending. The position of the limiting block and the bending shaft can be adjusted, which can be applicable to steel bars of different specifications, thereby improving the scope of application. When it is necessary to bend another section of the steel bar, the clamped and fixed steel bar can be directly driven to move laterally, without the need for personnel to disassemble the steel bar separately and then fix it, thus facilitating personnel operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the top view of a steel bar bending machine proposed by the utility model;

[0020] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of ;

[0021] Figure 3 It is a three-dimensional front view structural diagram of a steel bar bending machine proposed by the utility model, including a machine base, a disc, a central axis, a bending axis rotating to the right, a first threaded drive mechanism, a second threaded drive mechanism, a limiting block and a ball connector;

[0022] Figure 4 for Figure 3 A schematic cross-sectional structure diagram of ;

[0023] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part A.

[0024] In the figure: 100, machine base; 101, disc; 102, central axis; 103, bending axis; 104, driving motor; 1, U-shaped seat; 2, clamping plate; 3, T-shaped screw; 4, second L-shaped guide rod; 5, supporting seat; 6, first L-shaped guide rod; 7, multi-stage electric telescopic rod; 8, connecting block; 9, first groove; 10, first screw; 11, moving block; 12, L-shaped moving rod; 13, rectangular groove; 14, second screw; 15, rectangular rod; 16, limiting block. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Reference Figure 1-5 A steel bar bending machine includes a machine base 100, a disc 101 is provided on the right side of the top of the machine base 100, a central shaft 102 is fixedly installed at the center position of the top of the disc 101, a driving motor 104 whose output shaft is fixedly connected to the bottom of the disc 101 is embedded and fixed at the bottom of the machine base 100, wherein two supporting legs are fixedly connected to both sides of the bottom of the machine base 100, and the four supporting legs are used to support the entire device, and an embedding groove for fixing the driving motor 104 is opened at the bottom of the machine base 100, and a first circular hole is opened on the top inner wall of the embedding groove, A first bearing is fixedly sleeved in the first circular hole, and the inner side of the inner ring of the first bearing is fixedly connected to the outer side of the output shaft of the driving motor 104. The first bearing plays a role of rotating installation for the output shaft of the driving motor 104. A bending shaft 103 located in front of the central axis 102 is provided on the top of the disc 101, and the steel bars are bent by the bending shaft 103. A first threaded driving mechanism is installed on the top of the disc 101, and the top of the first threaded driving mechanism is fixedly connected to the bottom end of the bending shaft 103, wherein the first threaded driving mechanism includes a moving block 11, and the disc 101 The top of the movable block 11 is provided with a first groove 9 with an opening on the front side, and the movable block 11 is slidably installed on the bottom inner wall of the first groove 9, wherein a T-shaped slide rail is fixedly connected to the bottom inner wall of the first groove 9, and a T-shaped slide groove with openings on the front and rear sides is provided at the bottom of the movable block 11, and the T-shaped slide rail is slidably connected to the T-shaped slide groove, and the T-shaped slide rail plays a lateral guiding effect on the movable block 11, and the top of the movable block 11 is fixedly connected to the bottom end of the bending shaft 103, and a first screw 10 is rotatably installed on the rear inner wall of the first groove 9, wherein a first screw 10 is fixedly connected to the rear inner wall of the first groove 9 Two bearings, the inner side of the inner ring of the second bearing is fixedly connected to the outer side of the first screw 10, the second bearing serves to provide the first screw 10 with a rotatable installation effect, the front end of the first screw 10 extends to the front side of the disc 101 and is fixedly connected with a knob, the moving block 11 is threadedly sleeved on the first screw 10, wherein a first threaded hole is opened on the front side of the moving block 11, the first threaded hole is threadedly connected to the first screw 10, and the moving block 11 is threadedly connected to the first screw 10 through the first threaded hole, so that the moving block 11 can be driven to move laterally while the first screw 10 rotates;

[0027] The rear side of the compression bending shaft 103 is in movable contact with a limiting block 16, and a plurality of balls are embedded at the bottom of the limiting block 16. The limiting block 16 and the balls cooperate to limit the top of the steel bar. A second threaded drive mechanism is installed between the top of the limiting block 16 and the top of the compression bending shaft 103, wherein the second threaded drive mechanism includes an L-shaped moving rod 12, and the bottom end of the L-shaped moving rod 12 is fixedly connected to the top of the limiting block 16. A rectangular groove 13 is provided at the top of the compression bending shaft 103, and a rectangular rod 15 is slidably sleeved in the rectangular groove 13. The top of the rectangular rod 15 extends to the top of the compression bending shaft 103 and is fixedly connected to the top inner wall of the L-shaped moving rod 12. A second screw 14 is rotatably installed on the bottom inner wall of the rectangular groove 13, wherein the bottom inner wall of the rectangular groove 13 A third bearing is fixedly connected to the wall, and the inner side of the inner ring of the third bearing is fixedly connected to the outer side of the second screw rod 14. The third bearing serves to provide a rotatable installation for the second screw rod 14. The top end of the second screw rod 14 extends to the top of the L-shaped moving rod 12 and is fixedly connected to a rotating rod. The rectangular rod 15 is threadedly sleeved on the second screw rod 14, wherein the top end of the rectangular rod 15 is provided with a third threaded hole threadedly connected to the second screw rod 14. The second screw 14 is threadedly connected to the third threaded hole of the rectangular rod 15, and the rectangular rod 15 can be driven to move vertically while the second screw 14 rotates. The L-shaped moving rod 12 is sleeved on the second screw rod 14, wherein the top of the L-shaped moving rod 12 is provided with a movable hole, and the second screw 14 is located in the movable hole and does not contact the inner wall of the movable hole.

[0028] A clamping and fixing mechanism that is in movably contact with the top of the machine base 100 is provided on the left side of the disc 101, wherein the clamping and fixing mechanism includes a U-shaped seat 1 that is in movably contact with the top of the machine base 100, and two clamping plates 2 are provided in the U-shaped seat 1, and the sides of the two clamping plates 2 that are close to each other are both set as arc structures and are bonded and fixed with anti-skid rubbers, and the steel bars are clamped and fixed by the cooperation of the two clamping plates 2 and the two anti-skid rubbers, and the setting of the anti-skid rubber can effectively reduce the slipping during the clamping and fixing process, and the sides of the two clamping plates 2 that are away from each other are rotatably installed with T-shaped screws 3, and the sides of the two clamping plates 2 that are away from each other are fixedly connected with a fourth bearing, and the inner side of the inner ring of the fourth bearing is fixedly connected to the outer side of the corresponding T-shaped screw 3, and the fourth bearing serves to provide the corresponding T-shaped screw 3 with rotation. The U-shaped seat 1 is threadedly sleeved on the two T-shaped screws 3, and the two clamping plates 2 are fixedly connected with the second L-shaped guide rods 4 on the sides away from each other. The U-shaped seat 1 is slidably sleeved on the two second L-shaped guide rods 4, wherein the front inner wall and the rear inner wall of the U-shaped seat 1 are provided with second threaded holes and first guide holes, and the second threaded holes are threadedly connected with the corresponding T-shaped screws 3. The T-shaped screws 3 are threadedly connected with the U-shaped seat 1 through the corresponding second threaded holes, so that they can move in position while the T-shaped screws 3 are rotating. The inner wall of the first guide hole is slidably sleeved on the outer side of the corresponding second L-shaped guide rod 4, and the second L-shaped guide rod 4 has a lateral guiding effect on the corresponding clamping plate 2;

[0029] Two first L-shaped guide rods 6 are fixedly connected to the left side of the U-shaped seat 1, and a support seat 5 is fixedly connected to the left side of the top of the machine base 100, wherein the right side of the support seat 5 is provided with an avoidance hole with an opening at the top, and the avoidance hole is used for allowing steel bars to pass through, and the support seat 5 is slidably sleeved on the two first L-shaped guide rods 6, wherein two second guide holes are provided on the right side of the support seat 5, and the inner walls of the second guide holes are slidably sleeved with the outer sides of the corresponding first L-shaped guide rods 6, and the first L-shaped guide rods 6 have a lateral guiding effect on the clamping and fixing mechanism, and the front and rear sides of the support seat 5 are fixedly installed with multi-stage electric telescopic rods 7, and the front and rear sides of the U-shaped seat 1 are fixedly connected with connecting blocks 8, and the two connecting blocks 8 The left side is fixedly connected to the right end of the output shaft of the corresponding multi-stage electric telescopic rod 7, and the connection between the multi-stage electric telescopic rod 7 and the U-shaped seat 1 is realized by the connecting block 8. The utility model can block and limit the top of the steel bar during the bending process through the setting of a series of structures, which can effectively reduce the risk of the steel bar rising upward during the bending process and improve the quality of the steel bar bending. The position of the limiting block 16 and the bending shaft 103 can be adjusted, which can be applicable to steel bars of different specifications, thereby improving the scope of application. When it is necessary to bend another section of the steel bar, the clamped and fixed steel bar can be directly driven to move laterally, and there is no need for personnel to disassemble the steel bar separately and then fix it, which is convenient for personnel to operate.

[0030] Working principle: When in use, when bending the steel bar, first rotate the two T-shaped screws 3 to clamp the steel bar to be bent between the two clamping plates 2, and the steel bar is located between the central axis 102 and the bending axis 103. If the distance between the central axis 102 and the bending axis 103 is too large or too small to fit the steel bar, turn the knob to drive the first screw 10 to rotate. Under the action of the first threaded hole on the moving block 11, the first screw 10 rotates to drive the moving block 11 to move forward or backward, and the moving block 11 drives the bending axis 103 to move forward or backward. When the bending axis 103 moves to fit the steel bar, stop turning the knob. The adjustable position of the bending axis 103 can be applied to steel bars of different specifications, thereby increasing the scope of application. After the bending axis 103 is adjusted, the limiting block 1 6 is located above the steel bar, and then the forward rotating rod drives the second screw rod 14 to rotate. Under the action of the third threaded hole opened on the rectangular rod 15, the second screw rod 14 rotates and drives the rectangular rod 15 to move downward. The rectangular rod 15 slides downward in the rectangular groove 13 and drives the L-shaped moving rod 12 to move downward. When the L-shaped moving rod 12 drives the limiting block 16 and the ball to move downward until they contact the top of the steel bar, the rotating rod stops rotating. At this time, the limiting block 16 and the ball cooperate to limit the top of the steel bar, and then the forward driving motor 104 drives the disc 101 to rotate, and the disc 101 drives the central axis 102 and the bending shaft 103 to rotate. During the process of the bending shaft 103 rotating to bend the steel bar, the steel bar will not tilt upward, thereby reducing the risk of damage during the bending process and improving the quality of the steel bar bending.

[0031] After one section of the steel bar is bent, when it is necessary to bend another section of the steel bar, the drive motor 104 is started in the reverse direction, so that the disc 101 drives the central axis 102 and the pressure bending axis 103 to rotate and reset, and then the two multi-stage electric telescopic rods 7 are started in the forward direction, and the output shaft of the multi-stage electric telescopic rod 7 drives the U-shaped seat 1 to move right through the corresponding connecting block 8, and the U-shaped seat 1 drives the two first L-shaped guide rods 6 to move right, and the U-shaped seat 1 drives the steel bar to move right through the T-shaped screw 3 and the clamping plate 2 in turn. When the steel bar moves to the right to the section that needs to be bent and is located between the central axis 102 and the pressure bending axis 103, the multi-stage electric telescopic rod 7 can be stopped, and the drive motor 104 can be started again to perform the bending operation. When adjusting the position of the steel bar, the clamped and fixed steel bar can be directly driven to move by the multi-stage electric telescopic rod 7, and there is no need for personnel to disassemble the steel bar separately and then fix it, which is convenient for personnel to operate.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A steel bar bending machine, comprising a machine base (100), wherein a disc (101) is provided on the right side of the top of the machine base (100), a central shaft (102) is fixedly installed at the center position of the top of the disc (101), and a driving motor (104) whose output shaft is fixedly connected to the bottom of the disc (101) is embedded and fixed at the bottom of the machine base (100), characterized in that: The top of the disk (101) is provided with a bending shaft (103) located in front of the central shaft (102), and a first threaded driving mechanism is installed on the top of the disk (101). The top of the first threaded driving mechanism is fixedly connected to the bottom end of the bending shaft (103). The rear side of the bending shaft (103) is movably contacted with a limiting block (16). The bottom of the limiting block (16) is embedded with a plurality of balls. The same second threaded driving mechanism is installed between the top of the limiting block (16) and the top of the bending shaft (103). The left side of the machine base (100) is provided with a clamping and fixing mechanism that is in active contact with the top of the machine base (100), the left side of the clamping and fixing mechanism is fixedly connected to two first L-shaped guide rods (6), the left side of the top of the machine base (100) is fixedly connected to a support seat (5), the support seat (5) is slidably sleeved on the two first L-shaped guide rods (6), the front and rear sides of the support seat (5) are fixedly installed with multi-stage electric telescopic rods (7), and the output shaft ends of the two multi-stage electric telescopic rods (7) are respectively fixedly installed with the front and rear sides of the clamping and fixing mechanism.

2. A steel bar bending machine according to claim 1, characterized in that: The first thread drive mechanism comprises a moving block (11), a first groove (9) with an opening at the front side is formed on the top of the disc (101), the moving block (11) is slidably mounted on the bottom inner wall of the first groove (9), the top of the moving block (11) is fixedly connected to the bottom end of the bending shaft (103), a first screw rod (10) is rotatably mounted on the rear inner wall of the first groove (9), the front end of the first screw rod (10) extends to the front side of the disc (101) and is fixedly connected to a knob, and the moving block (11) is threadedly sleeved on the first screw rod (10).

3. A steel bar bending machine according to claim 2, characterized in that: The second threaded drive mechanism comprises an L-shaped moving rod (12), the bottom end of the L-shaped moving rod (12) is fixedly connected to the top of the limiting block (16), a rectangular groove (13) is provided at the top of the bending shaft (103), a rectangular rod (15) is slidably sleeved in the rectangular groove (13), the top end of the rectangular rod (15) extends to the top of the bending shaft (103) and is fixedly connected to the top inner wall of the L-shaped moving rod (12), a second screw rod (14) is rotatably mounted on the bottom inner wall of the rectangular groove (13), the top end of the second screw rod (14) extends to the top of the L-shaped moving rod (12) and is fixedly connected to a rotating rod, the rectangular rod (15) is threadedly sleeved on the second screw rod (14), and the L-shaped moving rod (12) is sleeved on the second screw rod (14).

4. A steel bar bending machine according to claim 3, characterized in that: The clamping and fixing mechanism comprises a U-shaped seat (1) that is in movable contact with the top of the machine base (100); the left side of the U-shaped seat (1) is fixedly connected to the right ends of the two first L-shaped guide rods (6); two clamping plates (2) are arranged inside the U-shaped seat (1); the sides of the two clamping plates (2) that are close to each other are both arranged as arc structures and are adhesively fixed with anti-skid rubber; the sides of the two clamping plates (2) that are away from each other are both rotatably mounted with T-shaped screws (3); the sides of the two T-shaped screws (3) that are away from each other extend to the outside of the U-shaped seat (1); the U-shaped seat (1) is threadedly sleeved on the two T-shaped screws (3); the sides of the two clamping plates (2) that are away from each other are both fixedly connected to the second L-shaped guide rods (4); the U-shaped seat (1) is slidably sleeved on the two second L-shaped guide rods (4); the front and rear sides of the U-shaped seat (1) are both fixedly connected to connecting blocks (8); the left sides of the two connecting blocks (8) are respectively fixedly connected to the right ends of the output shafts of the corresponding multi-stage electric telescopic rods (7).

5. A steel bar bending machine according to claim 2, characterized in that: A T-shaped slide rail is fixedly connected to the inner wall of the bottom of the first groove (9); a T-shaped slide groove with openings on the front and rear sides is provided at the bottom of the moving block (11); the T-shaped slide rail is slidably connected to the T-shaped slide groove; a first threaded hole is provided on the front side of the moving block (11); the first threaded hole is threadedly connected to the first screw rod (10).

6. A steel bar bending machine according to claim 1, characterized in that: The right side of the support seat (5) is provided with an avoidance hole with an open top.

7. A steel bar bending machine according to claim 4, characterized in that: The front inner wall and the rear inner wall of the U-shaped seat (1) are both provided with a second threaded hole and a first guide hole, the second threaded hole is threadedly connected to the corresponding T-shaped screw rod (3), and the inner wall of the first guide hole is slidably mounted on the outer side of the corresponding second L-shaped guide rod (4).

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