Automatic feeding and discharging steel bar cutting machine

Abstract

The present application relates to the technical field of steel bar cutting machine, especially to a steel bar cutting machine with automatic feeding and discharging, which comprises a steel bar cutting table and a conveying mechanism, the conveying mechanism comprises two groups of symmetrically arranged movable frames and synchronous electric push rods, a plurality of conveying rollers are rotatably installed on the inner side of the movable frame, a pressure sensor is fixedly installed on the outer wall of the movable frame, the output end of the synchronous electric push rod is fixedly connected with the pressure sensor, a large gear is fixedly installed on the upper end of the middle conveying roller, a servo motor is fixedly installed on the upper side of the front movable frame, a small gear is fixedly installed on the output end of the servo motor, and the small gear is engaged with the large gear. The present application realizes smooth conveying through constant pressure clamping and servo driving, realizes fixed-length automatic cutting through accurate length measurement of the encoder, and effectively suppresses the movement of the steel bar through the synergistic effect of the guide cylinder and the discharging protection cylinder, and automatically discharges the steel bar. The present application significantly improves the cutting precision and operation safety without manual feeding throughout the process.

Description

Technical Field

[0001] This invention relates to the technical field of rebar cutting machines, and in particular to an automatic rebar cutting machine with automatic loading and unloading. Background Technology

[0002] Rebar cutting machines are commonly used rebar processing equipment in construction engineering. They are mainly used to cut coiled or straight rebar into specified lengths according to construction needs for subsequent binding, welding, and other processes. Traditional rebar cutting machines typically consist of a cutting mechanism, a positioning mechanism, and a control system. During operation, the rebar is manually fed into the cutting nozzle, and the blade is controlled to cut downwards via a foot pedal or manual switch, completing a single cutting operation. Due to its simple structure and convenient operation, it is still widely used in small and medium-sized construction sites.

[0003] However, existing rebar cutting machines present significant safety hazards in practical use. Because cutting operations typically require operators to hold the rebar close to the blade for feeding and positioning, the tail of the rebar is highly susceptible to radial movement or bouncing at the moment the blade cuts down. This is especially true when cutting larger diameter or harder rebars, where the impact force is even more intense. This can lead to rebar bending or dimensional deviations, or even serious injury to the operator. Furthermore, the cut rebar segments often fall directly from the cut end without effective receiving or guiding devices, requiring operators to frequently bend over to retrieve them, increasing labor intensity and further exacerbating operational risks. Improving safety throughout the entire process from feeding and cutting to unloading is a pressing technical problem that rebar cutting machines urgently need to address.

[0004] We propose an automatic rebar cutting machine with automatic loading and unloading. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automatic rebar cutting machine with loading and unloading capabilities.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automatic rebar cutting machine includes a rebar cutting table and a conveying mechanism. The conveying mechanism includes two sets of symmetrically arranged movable frames and synchronous electric push rods. Several conveying rollers are rotatably installed inside the movable frames. A pressure sensor is fixedly installed on the outer wall of the movable frames. The output end of the synchronous electric push rod is fixedly connected to the pressure sensor. A large gear is fixedly installed on the upper end of the middle conveying roller. A servo motor is fixedly installed on the upper side of the front movable frame. A small gear is fixedly installed on the output end of the servo motor. The small gear meshes with the large gear. A rotary encoder is sleeved on the outer side of the upper end of the middle conveying roller on the other side.

[0008] Furthermore, a support leg is fixedly installed at the bottom of the rebar cutting table, a structural plate is fixedly installed on the upper side of the rebar cutting table, and the synchronous electric push rod is fixedly installed on the inner wall of the structural plate.

[0009] Through the above technical solution, the synchronous electric push rod is fixedly installed on the inner wall of the structural plate. The structural plate provides a stable mounting base for the push rod, ensuring that the push rod is subjected to uniform force and without deviation when it pushes the movable frame back and forth for a long time. The support legs play a stable supporting role for the entire equipment, ensuring that the whole machine does not shake or shift during high-intensity punching and conveying, providing a reliable foundation for subsequent precise clamping and metering.

[0010] Furthermore, two sets of stabilizing telescopic cylinders are symmetrically arranged on both sides of the synchronous electric push rod, and the stabilizing telescopic cylinders are fixedly installed between the structural plate and the movable frame.

[0011] Furthermore, a guide cylinder is provided on the right side of the conveying mechanism, and a support is fixedly connected between the bottom of the guide cylinder and the upper side of the rebar cutting platform.

[0012] Through the above technical solution, the guide cylinder is set between the conveying mechanism and the cutting station. Its inner diameter is slightly larger than the outer diameter of the steel bar. It plays a circumferential constraint and automatic centering role for the steel bar that is continuously conveyed forward, so that the steel bar always enters the cutting area along the longitudinal center line of the equipment. At the moment when the punching blade cuts down, the guide cylinder can effectively absorb and suppress the radial movement and rebound force caused by the impact at the tail of the steel bar, so as to avoid the steel bar bending or popping out and injuring people. Safety protection begins from the end of the conveying.

[0013] Furthermore, a rubber sleeve is fixedly bonded to the outer wall of the conveying roller.

[0014] Furthermore, a protective cover is screwed onto the upper side of the front movable frame. The protective cover covers the outside of the large gear, servo motor and small gear, and several dustproof and heat dissipation holes are provided on the side wall of the protective cover.

[0015] Through the above technical solution, the protective cover completely encloses the high-speed rotating large gear, small gear and servo motor output end inside. On the one hand, it prevents external sand, dust, concrete residue and other debris from entering the meshing surface and causing tooth wear or jamming. On the other hand, it physically isolates the operator from contact with the rotating parts and eliminates the risk of entanglement. The dustproof and heat dissipation holes opened on the side wall maintain the airtight protection while taking into account the ventilation and heat dissipation needs of the motor, ensuring that the transmission system does not overheat or accumulate dust during long-term continuous operation, thus taking into account both safety and durability.

[0016] Furthermore, a support frame is fixedly installed on the upper side of the rebar cutting platform, a controller is fixedly installed on the outer wall of the support frame, a hydraulic rod is fixedly installed at the bottom of the support frame, and a knife holder is fixedly installed on the lower side of the output end of the hydraulic rod.

[0017] Furthermore, a cutting blade is fixedly connected to the lower side of the blade holder, the lower end of the cutting blade is provided with a cutting edge, and several reinforcing ribs are provided between the cutting blade and the blade holder.

[0018] Through the above technical solution, the support frame provides a shared rigid mounting platform for the controller and hydraulic rod. The controller, as the central control unit of the whole machine, coordinates the timing of the actions of each actuator. The hydraulic rod drives the cutter holder to move the punching blade up and down to complete the cutting. The blade and the groove cooperate to achieve a clean and neat cut, ensuring a flat cut surface. The reinforcing ribs added between the cutter holder and the blade significantly improve the impact resistance of the connection. When punching large-diameter or high-hardness steel bars, it can effectively prevent the root of the blade from breaking or plastic deformation, extend the service life of the blade, and ensure the consistency of cutting.

[0019] Furthermore, a limiting groove is provided directly below the punching blade, and a cutting groove is formed on the limiting groove.

[0020] Furthermore, a material discharge protection cylinder is provided on the right side of the limiting groove, and a rotating shaft is fixedly connected to the bottom of the material discharge protection cylinder. A shaft seat is fixedly installed on the right side of the rebar cutting table, and the rotating shaft is rotatably installed inside the shaft seat. A support plate is fixedly installed at the bottom right side of the rebar cutting table, and an electric telescopic rod is hinged between the support plate and the bottom of the material discharge protection cylinder.

[0021] Through the above technical solution, the material protection cylinder on the right side of the limiting groove circumferentially limits the cut steel bar segment during the cutting process, preventing it from radially bouncing or rolling due to stress release at the moment of cutting. After the cutting is completed, the electric telescopic rod hinged on the support plate retracts, driving the material protection cylinder to rotate smoothly downward around the rotating shaft in the bearing seat, so that the steel bar segment automatically slides down under its own weight to complete the unloading. The whole process does not require manual close-range picking. After the unloading is completed, the telescopic rod extends to reset the protection cylinder, waiting for the next cutting, forming a complete safety closed loop of "conveying - guiding - cutting - limiting - automatic unloading".

[0022] Compared with related technologies, the automatic loading and unloading rebar cutting machine proposed in this invention has the following beneficial effects:

[0023] In this invention, an automatic rebar cutting machine with loading and unloading features a symmetrical movable frame driven by a synchronous electric push rod. A pressure sensor ensures constant pressure clamping of the rebar, preventing slippage and skewing during transport. Simultaneously, a servo motor drives the conveyor rollers via gear engagement, providing stable and controllable transport power. A rotary encoder on the other side calculates the conveyor linear speed in real time, and combined with the outer diameter of the conveyor rollers, accurately measures the transport length, enabling automatic cutting to a fixed length and significantly improving cutting accuracy and automation. Furthermore, a guide cylinder on the right side of the conveying mechanism centers and limits the rebar entering the cutting area, effectively suppressing radial movement of the rebar tail during cutting. After cutting, the unloading protection cylinder automatically deflects and unloads the rebar under the drive of an electric telescopic rod. The entire process eliminates the need for manual close-range hand-feeding or bending to pick up materials, forming a complete safety protection closed loop from feeding and cutting to unloading, significantly reducing operational risks and improving on-site safety and ease of operation. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of an automatic loading and unloading rebar cutting machine proposed in this invention;

[0026] Figure 2 This is a three-dimensional disassembled structural diagram of an automatic loading and unloading rebar cutting machine proposed in this invention;

[0027] Figure 3 This is a partial three-dimensional structural diagram of an automatic loading and unloading rebar cutting machine proposed in this invention;

[0028] Figure 4 This is a schematic diagram of the three-dimensional structure of a punching blade;

[0029] Figure 5 Schematic diagram of the three-dimensional structure of the conveying mechanism Figure 1 ;

[0030] Figure 6 Schematic diagram of the three-dimensional structure of the conveying mechanism Figure 2 ;

[0031] Figure 7 Schematic diagram of the three-dimensional structure of the conveying mechanism Figure 3 .

[0032] In the diagram: 1. Rebar cutting table; 2. Support leg; 3. Structural plate; 4. Support frame; 5. Controller; 6. Conveying mechanism; 61. Movable frame; 62. Synchronous electric push rod; 63. Pressure sensor; 64. Stabilizing telescopic cylinder; 65. Conveying roller; 66. Rubber sleeve; 67. Protective cover; 68. Dustproof and heat dissipation holes; 69. Rotary encoder; 610. Large gear; 611. Servo motor; 612. Small gear; 7. Support; 8. Guide cylinder; 9. Hydraulic rod; 10. Tool holder; 11. Punching blade; 12. Blade; 13. Reinforcing rib; 14. Limiting groove; 15. Tool groove; 16. Shaft seat; 17. Rotating shaft; 18. Material discharge protection cylinder; 19. Support plate; 20. Electric telescopic rod. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] Reference Figures 1-7 An automatic rebar cutting machine includes a rebar cutting table 1 and a conveying mechanism 6. The conveying mechanism 6 includes two sets of symmetrically arranged movable frames 61 and synchronous electric push rods 62. Several conveying rollers 65 are rotatably installed on the inner side of the movable frames 61. A pressure sensor 63 is fixedly installed on the outer wall of the movable frames 61. The output end of the synchronous electric push rod 62 is fixedly connected to the pressure sensor 63. A large gear 610 is fixedly installed on the upper end of the middle conveying roller 65. A servo motor 611 is fixedly installed on the upper side of the front movable frame 61. A small gear 612 is fixedly installed on the output end of the servo motor 611. The small gear 612 meshes with the large gear 610. A rotary encoder 69 is sleeved on the outer side of the upper end of the other middle conveying roller 65.

[0035] With the above configuration, the two symmetrically arranged movable frames 61 can move towards or away from each other under the drive of the synchronous electric push rod 62, thereby adapting to the clamping requirements of steel bars of different diameters; the pressure sensor 63 detects the clamping force in real time and feeds it back to the controller 5 to achieve constant pressure clamping, avoiding steel bar deformation due to excessive clamping force or slippage due to insufficient clamping force; the servo motor 611 drives the intermediate conveying roller 65 to rotate through the meshing transmission of the pinion 612 and the gear 610, providing stable and controllable conveying power for the steel bars; the rotary encoder 69 is sleeved on the outer side of the upper end of the intermediate conveying roller 65 on the other side, and rotates synchronously with the conveying roller 65 to measure the linear speed of the conveying roller 65 in real time. The controller 5 can accurately calculate the conveying length of the steel bars based on the outer diameter of the conveying roller 65 and the encoder pulse signal, realizing fixed-length automatic cutting.

[0036] In this method, a support leg 2 is fixedly installed at the bottom of the rebar cutting table 1, a structural plate 3 is fixedly installed on the upper side of the rebar cutting table 1, a synchronous electric push rod 62 is fixedly installed on the inner wall of the structural plate 3, and two sets of stable telescopic cylinders 64 are symmetrically arranged on both sides of the synchronous electric push rod 62. The stable telescopic cylinders 64 are fixedly installed between the structural plate 3 and the movable frame 61.

[0037] With the above configuration, the support leg 2 provides stable support for the rebar cutting table 1, ensuring the smooth operation of the equipment; the structural plate 3 serves as the mounting base for the synchronous electric push rod 62, ensuring that the push rod is firmly stressed when it moves; the stable telescopic cylinder 64 is symmetrically distributed on both sides of the synchronous electric push rod 62, playing a guiding and supporting role during the movement of the movable frame 61, preventing the movable frame 61 from tilting or swaying, and ensuring that the two sets of movable frames 61 always move in parallel, thereby ensuring the straightness and stability of the rebar clamping and conveying.

[0038] In this method, a guide cylinder 8 is provided on the right side of the conveying mechanism 6, and a support 7 is fixedly connected between the bottom of the guide cylinder 8 and the upper side of the rebar cutting table 1.

[0039] With the above configuration, the guide cylinder 8 is located between the conveying mechanism 6 and the cutting area. Its inner diameter is larger than the diameter of the steel bar to be cut. After the steel bar is sent out from the conveying mechanism 6, it passes through the guide cylinder 8 and enters the cutting area. The guide cylinder 8 plays a circumferential limiting and central guiding role for the steel bar, ensuring that the steel bar accurately enters the cutting position directly below the punching blade 11. At the same time, it effectively suppresses the radial movement and bouncing of the tail of the steel bar caused by the impact force at the moment the blade cuts down, avoiding bending of the steel bar or injury to the operator.

[0040] In this method, a rubber sleeve 66 is fixedly and adhesively fitted on the outer wall of the conveyor roller 65.

[0041] With the above-mentioned arrangement, the rubber sleeve 66 is wrapped around the outer wall of the conveying roller 65 and comes into direct contact with the surface of the steel bar. The elastic deformation of the rubber material increases the friction between the rubber and the steel bar, thereby improving the conveying efficiency and preventing the steel bar from slipping during the conveying process. At the same time, the rubber sleeve 66 has a buffering effect, preventing the rigid conveying roller 65 from causing indentations or scratches on the surface of the steel bar and ensuring the surface quality of the finished steel bar.

[0042] In this configuration, a protective cover 67 is screwed onto the upper side of the front movable frame 61. The protective cover 67 covers the outside of the large gear 610, the servo motor 611, and the small gear 612. Several dustproof and heat dissipation holes 68 are provided on the side wall of the protective cover 67.

[0043] With the above-described configuration, the protective cover 67 completely encloses the large gear 610, servo motor 611, and small gear 612, preventing external debris, dust, or accidental contact by operators with the operating gears and motor outputs, thus improving safety. The dustproof and heat dissipation holes 68, while ensuring the protective effect, facilitate the dissipation of heat from the servo motor 611 during operation, preventing overheating, and also allow a small amount of airflow to reduce internal dust accumulation and extend the service life of the transmission components.

[0044] In this method, a support frame 4 is fixedly installed on the upper side of the rebar cutting table 1, a controller 5 is fixedly installed on the outer wall of the support frame 4, a hydraulic rod 9 is fixedly installed at the bottom of the support frame 4, a knife holder 10 is fixedly installed on the lower side of the output end of the hydraulic rod 9, a punching blade 11 is fixedly connected to the lower side of the knife holder 10, a cutting edge 12 is provided at the lower end of the punching blade 11, a number of reinforcing ribs 13 are provided between the punching blade 11 and the knife holder 10, a limiting groove 14 is provided directly below the punching blade 11, and a knife groove 15 is opened on the limiting groove 14.

[0045] With the above configuration, the support frame 4 provides mounting support for the controller 5 and the hydraulic rod 9. The controller 5 is used to coordinate and control the timing of the actions of the synchronous electric push rod 62, the servo motor 611, the hydraulic rod 9, and the electric telescopic rod 20. The hydraulic rod 9 drives the cutter holder 10 and the punching blade 11 to punch downwards. The blade 12 and the cutter groove 15 cooperate to complete the cutting of the steel bar. The reinforcing rib 13 enhances the structural strength at the connection between the punching blade 11 and the cutter holder 10, preventing the blade from breaking or deforming when punching large-diameter steel bars. The limiting groove 14 positions and limits the cutting position of the steel bar. The cutter groove 15 provides clearance space for the blade 12, ensuring a flat cutting surface and preventing the blade 12 from directly impacting the steel bar cutting table 1 and causing damage.

[0046] In this method, a material discharge protection cylinder 18 is provided on the right side of the limiting groove 14, and a rotating shaft 17 is fixedly connected to the bottom of the material discharge protection cylinder 18. A shaft seat 16 is fixedly installed on the right side of the rebar cutting table 1, and the rotating shaft 17 is rotatably installed inside the shaft seat 16. A support plate 19 is fixedly installed at the bottom right side of the rebar cutting table 1, and an electric telescopic rod 20 is hinged between the support plate 19 and the bottom of the material discharge protection cylinder 18.

[0047] With the above-mentioned setup, the material discharge protection cylinder 18 is located on the right side of the cutting area, and its inner diameter is larger than the diameter of the cut steel bar segment. During the cutting process, it plays a circumferential limiting role on the steel bar segment to prevent radial movement of the steel bar segment at the moment of cutting. After the cutting is completed, the electric telescopic rod 20 retracts, driving the material discharge protection cylinder 18 to deflect downward around the rotating shaft 17 within the bearing seat 16, so that the steel bar segment automatically slides down and is unloaded under the action of gravity, realizing automatic material discharge. The support plate 19 provides an installation fulcrum for the electric telescopic rod 20 to ensure the stress stability of the telescopic rod when it is in motion.

[0048] The working principle of an automatic rebar cutting machine with loading and unloading is as follows:

[0049] This invention discloses an automatic rebar cutting machine with loading and unloading. During operation, the rebar to be cut is fed from the left side into the conveying roller 65 between two sets of movable frames 61. The controller 5 controls a synchronous electric push rod 62 to push the two sets of movable frames 61 towards each other. A pressure sensor 63 detects the clamping force in real time and feeds it back to the controller 5. When the preset clamping pressure is reached, the machine stops pushing, achieving constant pressure clamping of the rebar. Subsequently, the controller 5 starts a servo motor 611, which, after deceleration and torque increase through meshing of a small gear 612 and a large gear 610, drives the intermediate conveying roller 65 to rotate. The other conveying rollers 65 rotate passively, and the rebar is smoothly conveyed to the right under the friction of the rubber sleeve 66. During the conveying process, a rotary encoder 69 on the upper end of the other intermediate conveying roller 65 rotates synchronously with the roller and outputs pulse signals. The controller 5 calculates the real-time linear velocity based on the number of pulses per unit time and the outer diameter of the conveying roller 65, and accumulates the calculated length of the conveyed rebar. When the preset cutting length is reached, the servo motor 611 stops rotating.

[0050] The reinforcing bar passes through the guide cylinder 8 into the cutting area, where the guide cylinder 8 centers and limits its movement. The controller 5 activates the hydraulic rod 9, driving the cutter holder 10 and the punching blade 11 to descend rapidly. The blade 12 engages with the cutting groove 15 on the limiting groove 14 to cut the reinforcing bar. At the moment of cutting, the guide cylinder 8 inhibits the radial movement of the reinforcing bar tail, and the unloading protection cylinder 18 circumferentially limits the cut reinforcing bar segment to prevent it from bouncing. After cutting, the controller 5 controls the electric telescopic rod 20 to retract, causing the unloading protection cylinder 18 to rotate downwards around the pivot 17. The reinforcing bar segment slides down under gravity for unloading, and then the electric telescopic rod 20 extends and resets, completing one automatic loading, unloading, and cutting cycle.

[0051] In the above technical solution, the specific control logic for the rotary encoder 69 to measure linear velocity and accumulate the transmission length, the algorithm for the controller 5 to receive pulse signals and calculate the length, and the timing control program between the synchronous electric push rod 62, the servo motor 611, the hydraulic rod 9, and the electric telescopic rod 20 are all conventional control contents that can be set independently by those skilled in the art according to actual working conditions. There is no need to elaborate on the specific software code or algorithm parameters in the mechanical structure patent. The core of this application's protection lies in the overall structural scheme formed by the connection relationship, positional arrangement, and synergistic effect of various mechanical components. The parts involving electrical control logic can be implemented using conventional control methods known in the art. After reading this specification and the accompanying drawings, those skilled in the art, combined with common knowledge in the art, can clearly understand the working principle of each component and implement it. There is no problem of insufficient disclosure. The synchronous electric push rod 62, pressure sensor 63, servo motor 611, rotary encoder 69, hydraulic rod 9, and electric telescopic rod 20 used in this invention are all standard commercially available components in the prior art. Their specific model selection and parameter configuration are conventional choices for those skilled in the art and do not need to be limited one by one in this specification.

[0052] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An automatic rebar cutting machine with loading and unloading, characterized in that: include: Rebar cutting table (1); The conveying mechanism (6) includes two sets of symmetrically arranged movable frames (61) and synchronous electric push rods (62). Several conveying rollers (65) are rotatably installed on the inner side of the movable frame (61). A pressure sensor (63) is fixedly installed on the outer wall of the movable frame (61). The output end of the synchronous electric push rod (62) is fixedly connected to the pressure sensor (63). A large gear (610) is fixedly installed on the upper end of the middle conveying roller (65). A servo motor (611) is fixedly installed on the upper side of the front movable frame (61). A small gear (612) is fixedly installed on the output end of the servo motor (611). The small gear (612) meshes with the large gear (610). A rotary encoder (69) is sleeved on the outer side of the upper end of the middle conveying roller (65) on the other side.

2. The automatic loading and unloading steel bar cutting machine according to claim 1, characterized in that: The bottom of the rebar cutting table (1) is fixedly installed with a support leg (2), and a structural plate (3) is fixedly installed on the upper side of the rebar cutting table (1). The synchronous electric push rod (62) is fixedly installed on the inner wall of the structural plate (3).

3. The automatic loading and unloading steel bar cutting machine according to claim 2, characterized in that: Two sets of stabilizing telescopic cylinders (64) are symmetrically arranged on both sides of the synchronous electric push rod (62), and the stabilizing telescopic cylinders (64) are fixedly installed between the structural plate (3) and the movable frame (61).

4. The automatic loading and unloading steel bar cutting machine according to claim 1, characterized in that: A guide cylinder (8) is provided on the right side of the conveying mechanism (6), and a support (7) is fixedly connected between the bottom of the guide cylinder (8) and the upper side of the rebar cutting table (1).

5. The automatic loading and unloading steel bar cutting machine according to claim 1, characterized in that: A rubber sleeve (66) is fixedly bonded to the outer wall of the conveying roller (65).

6. The automatic loading and unloading steel bar cutting machine according to claim 1, characterized in that: A protective cover (67) is screwed onto the upper side of the front movable frame (61). The protective cover (67) covers the outside of the large gear (610), the servo motor (611) and the small gear (612). Several dustproof and heat dissipation holes (68) are provided on the side wall of the protective cover (67).

7. The automatic loading and unloading steel bar cutting machine according to claim 1, characterized in that: A support frame (4) is fixedly installed on the upper side of the rebar cutting table (1), a controller (5) is fixedly installed on the outer wall of the support frame (4), a hydraulic rod (9) is fixedly installed at the bottom of the support frame (4), and a knife holder (10) is fixedly installed on the lower side of the output end of the hydraulic rod (9).

8. The automatic loading and unloading steel bar cutting machine according to claim 7, characterized in that: A punching blade (11) is fixedly connected to the lower side of the blade holder (10). The lower end of the punching blade (11) is provided with a cutting edge (12). Several reinforcing ribs (13) are provided between the punching blade (11) and the blade holder (10).

9. The automatic loading and unloading steel bar cutting machine according to claim 8, characterized in that: The punching blade (11) is positioned directly below a limiting groove (14), and a cutting groove (15) is provided on the limiting groove (14).

10. The automatic loading and unloading steel bar cutting machine according to claim 9, characterized in that: A material discharge protection cylinder (18) is provided on the right side of the limiting groove (14). A rotating shaft (17) is fixedly connected to the bottom of the material discharge protection cylinder (18). A shaft seat (16) is fixedly installed on the right side of the rebar cutting table (1). The rotating shaft (17) is rotatably installed inside the shaft seat (16). A support plate (19) is fixedly installed at the bottom right side of the rebar cutting table (1). An electric telescopic rod (20) is hinged between the support plate (19) and the bottom of the material discharge protection cylinder (18).

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