Rebar cutting device for building construction

Abstract

The application relates to the technical field of steel bar cutting, and discloses a steel bar cutting device for building construction, which comprises a base, a vertical plate is fixedly installed at the top of the base, a control panel is fixedly assembled on the outer wall of the vertical plate, a supporting frame is installed at the end, away from the control panel, of the vertical plate, a ring-shaped frame is fixedly installed at the top of the supporting frame, a measuring assembly is arranged on the inner wall of the ring-shaped frame, and a circular plate is fixedly clamped on the inner wall of the control panel. The length of the steel bar is measured by the multiple measuring assemblies instead of infrared sensors, so that the steel bar characteristic identification and length accurate measurement are integrated. The linear displacement sensors in the three measuring assemblies collect the "axle center-steel bar distance", which can not only back-propagate the steel bar diameter, but also offset the length calculation error caused by the wear of the pulley; meanwhile, the redundant counting of the double incremental rotary encoders can reduce the influence of slipping and solve the contradiction of the traditional equipment, that is, the accuracy depends on external sensors or is easily affected by the environment.

Description

Technical Field

[0001] This invention relates to the field of rebar cutting technology, specifically to a rebar cutting device for building construction. Background Technology

[0002] Rebar cutting equipment is a specialized device used in construction, rebar processing plants, and other fields to precisely cut rebar to the length required by design drawings. Its performance and efficiency directly affect the progress, cost control, and structural safety of the entire project.

[0003] Existing steel bar cutting devices used in construction mostly adopt a single mode of "hydraulic cold cutting" or "plasma thermal cutting", which has obvious limitations in application scenarios:

[0004] 1. Functional adaptability deficiency: A single cutting mode cannot cover the needs of all scenarios;

[0005] Single cold cutting defects: Limited shearing force. For steel bars with a diameter of φ32mm or larger or high hardness steel bars such as HRB600, it is easy to "cut without breaking" or "blade breakage". Moreover, multiple pressure shearing is required, which is not only inefficient (a single cutting takes more than 10 seconds), but also causes deformation of the steel bar cut and internal stress concentration, affecting the subsequent connection strength.

[0006] Single hot cutting defect: When cutting steel bars with a diameter of less than φ12mm, excessive energy leads to severe melting of the cut and a heat-affected zone of 2-3mm (far exceeding the standard requirement of ≤0.5mm), resulting in a decrease in the local strength of the steel bar; when cutting steel bars with special coatings such as galvanized and plastic-coated steel bars, toxic fumes are generated, and there is no targeted protective design.

[0007] Furthermore, in existing steel bar cutting devices used in construction, the measurement of steel bar length and the adjustment of cutting parameters are disconnected, and the accuracy is easily affected by the environment and wear.

[0008] II. Precision control defects: Relies on external sensors and lacks dynamic self-adaptation capability;

[0009] Length measurement relies on external devices: either infrared sensors (susceptible to dust and vibration at the construction site, with an error ≥ ±1mm), or simply wheel count calculations (without considering wheel wear and rebar slippage, with an error ≥ ±0.8mm). There is no "dynamic correction mechanism for wheel distance - circumference," resulting in a cutting length deviation rate of 5% to 8%.

[0010] Third, the existing technology's "conveying-measuring-cutting" process is characterized by independent stages and low coordination efficiency.

[0011] Asynchronous conveying and cutting: There is no linkage control between the conveying speed and the cutting speed of the wheel set. After the steel bar reaches the cutting position, the machine needs to be stopped and wait for parameter adjustment.

[0012] In summary, the fundamental problem with existing technologies is the lack of real-time perception and dynamic adaptation capabilities for the characteristics of reinforcing bars. They cannot automatically identify the length of reinforcing bars and match the optimal cutting scheme, nor can they cope with the complex working conditions of wear and displacement on the construction site. As a result, efficiency, accuracy, and safety cannot be achieved simultaneously, and therefore, improvements are needed. Summary of the Invention

[0013] This invention provides a steel bar cutting device for building construction, which solves the problems mentioned in the background art.

[0014] The present invention provides the following technical solution: a steel bar cutting device for building construction, comprising a base, characterized in that: a vertical plate is fixedly installed on the top of the base, a support frame is installed on the end of the vertical plate away from the control panel, a ring frame is fixedly installed on the top of the support frame, a measuring component is provided on the inner wall of the ring frame, and a steel bar body is provided at the center of the ring frame;

[0015] The measuring assembly includes a fixed plate, an electric telescopic cylinder mounted on the outer wall of the fixed plate, a telescopic rod mounted on the telescopic end of the electric telescopic cylinder, a linear displacement sensor mounted on the bottom of the electric telescopic cylinder, an mounting plate mounted on the bottom of the telescopic rod, a connecting plate mounted on the inner wall of the mounting plate by mounting bolts, a clamping block fixedly mounted on the bottom of the connecting plate, a horizontal plate fixedly mounted on the outer wall of the clamping block, a drive motor embedded in the inner cavity of the horizontal plate, a driving bevel gear fixedly mounted on the power output shaft of the drive motor, a driven bevel gear meshing with the bottom of the driving bevel gear, a connecting gear mounted on the outer wall of the driven bevel gear, a rotating shaft fixedly mounted at the center of the connecting gear, and an incremental rotary encoder mounted on the end of the rotating shaft.

[0016] Three sets of measuring components are installed on the inner wall of the ring frame. The electric telescopic cylinder, mounting bolts, incremental rotary encoder and linear displacement sensor are all electrically connected to the control panel. The three sets of measuring components are arranged in a ring at a fixed angle of 120° on the inner wall of the ring frame. The electric telescopic cylinder is fixedly installed on the inner wall of the ring frame by a fixing plate.

[0017] In use, the steel bar body is placed on the inner wall of the two sets of measuring components. The control panel sends a signal to start the electric telescopic cylinder, so that the telescopic rod adjusts the pulley to abut and clamp the steel bar body. The pulley clamps the steel bar body through the arc groove and conveys it forward, which avoids slippage and excessive compression deformation. At this time, the incremental rotary encoder collects the number of rotations of the pulley, and the linear displacement sensor collects the distance between the pulley axis and the steel bar body in real time, and transmits the data synchronously to the control panel. The drive motor drives the steel bar body to the cutting component at a preset speed. The linear displacement sensor and the electric telescopic cylinder act synchronously and collect displacement data in real time, which can dynamically adapt to the clamping adjustment of steel bar bodies of different lengths.

[0018] As a preferred technical solution of the present invention: the inner wall of the electric telescopic cylinder is slidably connected with a guide rod, the bottom of the connecting plate is fixedly equipped with a clamping block, the inner wall of the clamping block is rotatably connected with a pulley, and the outer wall of the pulley is provided with an arc-shaped groove.

[0019] As a preferred technical solution of the present invention: a control panel is fixedly assembled on the outer wall of the upright plate, a circular plate is fixedly clamped on the inner wall of the control panel, a cutting component is provided on the top of the circular plate, a receiving plate is fixedly installed on the top of the base, and a groove is opened on the inner wall of the circular plate, and the cross-section of the groove is in the shape of "I".

[0020] As a preferred technical solution of the present invention: the cutting assembly includes a stepper motor, the power output shaft of the stepper motor is fixedly fitted with a rotating rod, the outer wall of the rotating rod is fixedly sleeved with a rotating handle, the top of the rotating handle is fixedly installed with a slider, and the bottom of the rotating handle is respectively provided with a hydraulic cold cutting module and a plasma thermal cutting module.

[0021] As a preferred technical solution of the present invention: the stepper motor is electrically connected to the control panel, and a shift fork mechanism is installed in the inner cavity of the stepper motor; the weight of the hydraulic cold cutting module is adapted to the weight of the plasma thermal cutting module; there are two sliders, and the two sliders are symmetrically distributed at both ends of the rotating handle; the sliders are located on the inner wall of the slide groove, and the sliders slide on the inner wall of the slide groove; the hydraulic cold cutting module and the plasma thermal cutting module are arranged parallel to each other at the bottom of the circular plate.

[0022] As a preferred technical solution of the present invention: the hydraulic cold cutting module includes a square plate, a servo motor and a limit rod are fixedly installed on the bottom of the square plate, a lead screw is fixedly mounted on the power output shaft of the servo motor, a lead screw nut is threadedly connected to the outer wall of the lead screw, a hydraulic pump and a cooler are fixedly mounted on the bottom of the lead screw nut, a cutting cylinder is installed on the bottom of the hydraulic pump, a proportional valve is installed on the outer wall of the cutting cylinder, an adjustable cutting blade is fixedly mounted on the telescopic end of the proportional valve, and a connecting oil pipe is installed at the bottom of the cooler.

[0023] As a preferred technical solution of the present invention: a miniature pressure sensor is installed between the lead screw nut and the hydraulic pump, and the range of the sensor is 0-500N. There are four servo motors and four limit rods, and the four servo motors and limit rods are evenly distributed at the bottom of the square plate. The servo motors, hydraulic pumps, cutting cylinders, proportional valves and coolers are all electrically connected to the control panel. The connecting oil pipes and return oil pipes are connected in series, and the oil pipe joints adopt double compression fittings.

[0024] As a preferred embodiment of the present invention: the plasma thermal cutting module includes a fixed shell, a rotating motor is fixedly installed on the outer wall of the fixed shell, a lead screw is fixedly mounted on the power output shaft of the rotating motor, a slide rail is fixedly installed on the inner wall of the fixed shell, a lead screw nut is threadedly connected to the outer wall of the lead screw, a frame is fixedly mounted on the outer wall of the lead screw nut, a small motor is fixedly installed on the top of the frame, a lead screw is fixedly mounted on the power output shaft of the small motor, a lead screw nut is threadedly connected to the outer wall of the lead screw nut, a vertical plate is fixedly installed on the outer wall of the lead screw nut, a limit block is fixedly installed on one end of the vertical plate, a plasma power supply is fixedly mounted on the other end of the vertical plate, a heat dissipation hole is opened on the top of the plasma power supply, a flow regulating valve is installed on the outer wall of the plasma power supply, and a cutting gun is installed on the bottom of the plasma power supply.

[0025] As a preferred technical solution of the present invention: the rotating motor, the small motor, the plasma power supply and the flow regulating valve are all electrically connected to the control panel; the top of the fixed shell is fixedly connected to one end of the bottom of the rotating handle; a tungsten electrode is embedded in the center of the cutting gun; and the frame is made of 304 stainless steel.

[0026] The present invention has the following beneficial effects:

[0027] 1. This steel bar cutting device for construction uses multiple sets of measuring components to replace external sensors such as infrared sensors for measuring the length of steel bars, achieving integrated "steel bar characteristic identification + length measurement". It also uses a linear displacement sensor in one of the three measuring components to collect the "axis-steel bar distance" and infer the steel bar diameter. Simultaneously, combined with redundant counting by a dual-increment rotary encoder, it reduces the impact of slippage and eliminates reliance on external sensors such as infrared and laser sensors. It is also resistant to interference from construction sites such as dust and vibration, resolving the contradiction of traditional equipment that "either depends on external sensors for accuracy or is easily affected by environmental interference".

[0028] 2. This steel bar cutting device for building construction measures the length of the steel bars through a measuring component and uploads the data to the control panel. It can achieve intelligent linkage between "steel bar characteristics and cutting mode" without manual switching. Based on the "diameter (D) + hardness (H)" dual parameters sensed by the measuring component, it automatically selects hydraulic cold cutting of ordinary steel bars or plasma hot cutting of high-hardness steel bars. With the help of the servo motor shifting fork mechanism, it can achieve "non-stop type change" for steel bars of multiple specifications and materials. It breaks through the limitations of the traditional single cutting mode, ensuring that the cut of ordinary steel bars is free from heat impact, and solving the problems of low cutting efficiency and easy blade wear of large-diameter high-hardness steel bars. It comprehensively adapts to and covers more than 95% of steel bar processing needs in building construction.

[0029] 3. This steel bar cutting device for building construction uses the pulley sensing data in the measuring component as the only input to achieve "real-time linkage adjustment" of cutting parameters. The cold cutting module automatically adapts to the blade spacing and hydraulic pressure, while the plasma module automatically matches the cutting current. No manual preset or type change debugging is required, which improves the efficiency of type change. At the same time, it avoids the problems of "excessive energy leading to cut defects" (hot cutting of small diameter steel bars) or "insufficient shearing force leading to incomplete cut" (cold cutting of large diameter steel bars) in a single cutting mode. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure on the other side of the present invention;

[0032] Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention;

[0033] Figure 4 This is a schematic diagram of the support frame structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the measurement component structure of the present invention;

[0035] Figure 6 This is a schematic diagram of the fixing plate structure of the present invention;

[0036] Figure 7 This is a schematic diagram of the mounting bolt structure of the present invention;

[0037] Figure 8 This is a schematic diagram of the overall cutting assembly structure of the present invention;

[0038] Figure 9 This is a schematic diagram of the servo motor structure of the present invention;

[0039] Figure 10 This is a schematic diagram of the hydraulic cold cutting component module of the present invention;

[0040] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point A in the middle;

[0041] Figure 12 This is a schematic diagram of the plasma thermal cutting module structure of the present invention;

[0042] Figure 13 This is a schematic diagram of the other side of the plasma thermal cutting module of the present invention;

[0043] Figure 14 This is a schematic cross-sectional view of the ion thermal cutting module of the present invention.

[0044] In the diagram: 1. Base; 2. Vertical plate; 3. Control panel; 4. Support frame; 5. Ring frame; 6. Measuring assembly; 7. Circular plate; 8. Cutting assembly; 9. Reinforcing bar body; 10. Receiving plate; 11. Slide groove;

[0045] 601. Fixed plate; 602. Electric telescopic cylinder; 603. Telescopic rod; 604. Guide rod; 605. Mounting plate; 606. Mounting bolt; 607. Connecting plate; 608. Clamping block; 609. Pulley; 610. Arc-shaped groove; 611. Horizontal plate; 612. Drive motor; 613. Driving bevel gear; 614. Driven bevel gear; 615. Connecting gear; 616. Rotating shaft; 617. Incremental rotary encoder; 618. Linear displacement sensor;

[0046] 801. Stepper motor; 802. Rotating rod; 803. Rotating handle; 804. Slider; 805. Hydraulic cold cutting module; 806. Plasma thermal cutting module;

[0047] 8051, Square plate; 8052, Servo motor; 8053, Limit rod; 8054, Lead screw one; 8055, Lead screw nut one; 8056, Hydraulic pump; 8057, Cutting cylinder; 8058, Proportional valve; 8059, Adjustable spacing cutting blade; 80510, Cooler; 80511, Connecting oil pipe;

[0048] 8061. Fixed housing; 8062. Rotary motor; 8063. Lead screw II; 8064. Slide rail; 8065. Lead screw nut II; 8066. Frame; 8067. Small motor; 8068. Lead screw III; 8069. Lead screw nut III; 80610. Vertical plate; 80611. Limiting block; 80612. Plasma power supply; 80613. Heat dissipation hole; 80614. Flow regulating valve; 80615. Cutting gun. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Please see Figure 1 - Figure 14 A rebar cutting device for building construction includes a base 1, a vertical plate 2 fixedly installed on the top of the base 1, a control panel 3 fixedly mounted on the outer wall of the vertical plate 2, a support frame 4 installed at the end of the vertical plate 2 away from the control panel 3, a ring frame 5 fixedly installed on the top of the support frame 4, a measuring component 6 provided on the inner wall of the ring frame 5, a circular plate 7 fixedly clamped on the inner wall of the control panel 3, a cutting component 8 provided on the top of the circular plate 7, a rebar body 9 provided at the center of the ring frame 5, a receiving plate 10 fixedly installed on the top of the base 1, and a groove 11 provided on the inner wall of the circular plate 7, the cross-section of the groove 11 being in the shape of an "I".

[0051] In the above structure, the base 1 provides stable support for the entire device, the upright plate 2 serves as the core installation carrier and also supports the control panel 3 and the support frame 4, the ring frame 5 works with the measuring component 6 to clamp the main body 9 of the steel bar and detect parameters, the circular plate 7 provides an installation reference for the cutting component 8, the slide groove 11 is adapted to the sliding adjustment of the cutting component 8, and the receiving plate 10 receives the cut main body 9 of the steel bar. The overall structure is compact and meets the space usage requirements of the construction site.

[0052] Preferably, the measuring component 6 includes a fixing plate 601, an electric telescopic cylinder 602 is fixedly installed on the outer wall of the fixing plate 601, a telescopic rod 603 is fixedly assembled at the telescopic end of the electric telescopic cylinder 602, a guide rod 604 is slidably connected to the inner wall of the electric telescopic cylinder 602, an mounting plate 605 is fixedly installed at the bottom of the telescopic rod 603, a connecting plate 607 is installed on the inner wall of the mounting plate 605 by mounting bolts 606, a clamping block 608 is fixedly assembled at the bottom of the connecting plate 607, a pulley 609 is rotatably connected to the inner wall of the clamping block 608, and an arc-shaped groove 610 is formed on the outer wall of the pulley 609.

[0053] In the above structure, the fixing plate 601 provides a stable mounting base for the electric telescopic cylinder 602, ensuring that it remains secure after being assembled onto the inner wall of the ring frame 5 via the fixing plate 601. The three sets of pulleys 609 are arranged at a 120-degree angle to avoid installation deviations affecting the accuracy of subsequent geometric calculations. The mounting bolts 606 can detach the connecting plate 607 from the mounting plate 605, facilitating quick replacement when the pulleys 609 are worn or damaged, thus ensuring the accuracy of the measurement data of the steel reinforcement body 9.

[0054] Preferably, a horizontal plate 611 is fixedly installed on the outer wall of the clamping block 608, a drive motor 612 is fixedly embedded in the inner cavity of the horizontal plate 611, an active bevel gear 613 is fixedly assembled on the power output shaft of the drive motor 612, a driven bevel gear 614 meshes with the bottom of the active bevel gear 613, a connecting gear 615 is fixedly installed on the outer wall of the driven bevel gear 614, a rotating shaft 616 is fixedly assembled at the center of the connecting gear 615, an incremental rotary encoder 617 is installed at the end of the rotating shaft 616, and a linear displacement sensor 618 is fixedly installed at the bottom of the electric telescopic cylinder 602.

[0055] In the above structure, multiple sets of measuring components 6 rotate in tandem to measure the length of the main steel bar 9 without the need for additional infrared sensors, making it suitable for dusty and space-constrained construction sites. The linear displacement sensor 618 and the electric telescopic cylinder 602 operate synchronously to collect displacement data in real time, which can dynamically adapt to the clamping and adjustment of different main steel bars 9. The three sets of measuring components 6 perform redundant calculations to effectively offset single-set mechanical errors, improve distance measurement accuracy, and meet the accuracy requirements for conveying and clamping the main steel bar 9.

[0056] Preferably, three sets of measuring components 6 are installed on the inner wall of an annular frame 5. The electric telescopic cylinder 602, mounting bolts 606, incremental rotary encoder 617 and linear displacement sensor 618 are all electrically connected to the control panel 3. The three sets of measuring components 6 are arranged in a ring at a fixed angle of 120 degrees on the inner wall of the annular frame 5. The electric telescopic cylinder 602 is fixedly installed on the inner wall of the annular frame 5 by a fixing plate 601.

[0057] In the above structure, the three sets of measuring components 6 are symmetrically arranged at three points to ensure uniform force on the main body 9 of the reinforcing steel, simplifying the geometric calculation process; the displacement of the telescopic rod 603 driven by the electric telescopic cylinder 602 is collected in real time by the linear displacement sensor 618, combined with the initial distance S from the axis of the three sets of measuring components 6 to the equipment reference point, and the telescopic amount. , as well as (Elongation is positive, shortening is negative), thus enabling real-time calculation: distance can be derived through geometric relationships;

[0058] Let point O be the center of the main steel reinforcement 9, and points A, B, and C be the axles of the three sets of wheels. The distance between the axle of pulley 609 and the main steel reinforcement 9 needs to be calculated. (Because the three sets of measuring components are symmetrically clamped, it can be known that...) (And to reduce errors by taking the average value in actual situations), the specific steps are as follows:

[0059] ① Calculate the actual radial position of a single set of wheels:

[0060] The actual distance from the axle of each set of wheels to the equipment reference point is:

[0061] That is, "initial installation distance + extension / retraction amount";

[0062] ②Use the triangle cosine theorem to establish the equation:

[0063] Taking any two sets of pulleys 609 (such as A and B) as an example, their axes form a structure with the center O of the main body of the reinforcing steel 9.

[0064] Where AB is the straight-line distance between the two axes A and B, determined by a fixed included angle of 120° and the actual radial position. , calculate:

[0065]

[0066] ( It can be simplified to );

[0067] at the same time, =d 2 +d 2 +d 2 =3d 2 (Since OA=OB=d, the included angle is still 120°).

[0068] ③ Solve for the distance d: Solve the two equations simultaneously to get 3d 2=L2 1 +L2 2+L1L2, therefore the d1 calculated for a single group is 2+L1L2. Similarly, calculate d2 using groups B and C, and d3 using groups A and C0, and finally take the average of the three. d is the final distance between the axis of pulley 609 and the main body of steel bar 9; the amount of expansion and contraction collected by linear displacement sensor 618. In the process, a "mechanical clearance correction value" is pre-added to avoid displacement errors during reverse adjustment. Furthermore, the equipment is calibrated using known standard steel bars before leaving the factory, and the results are recorded. , as well as (and the calculated d, compared with the theoretical value (theoretically) (where r is the radius of pulley 609), the deviation of the fixed parameter S is corrected to ensure long-term measurement accuracy. Due to the number of measuring components 6, the average value is taken after calculation, which can be used to measure the length of the steel bar body 9. The number of rotations N of pulley 609 is collected by incremental rotary encoder 617, and combined with the actual circumference C0, the estimated value is obtained. And the actual radius of the pulley 609 is calculated by using the linear displacement sensor 618 to detect the real-time distance d. (where D is the diameter of the reinforcing bar, which is derived from d), and thus the actual perimeter is obtained. The corrected length is The length of the main steel bar is calculated, and a mechanical clearance correction value is added in advance. The steel bar is calibrated with standard steel bars before leaving the factory to ensure long-term measurement accuracy.

[0069] If the distance data calculated for three consecutive sets is consistent, but If the deviation from the "preset length - L0" exceeds ±0.3mm, it is judged as slippage, and the conveying will be automatically paused via step 3.

[0070] Preferably, the cutting assembly 8 includes a stepper motor 801, a rotating rod 802 is fixedly mounted on the power output shaft of the stepper motor 801, a rotating handle 803 is fixedly sleeved on the outer wall of the rotating rod 802, a slider 804 is fixedly mounted on the top of the rotating handle 803, and a hydraulic cold cutting module 805 and a plasma thermal cutting module 806 are respectively provided at the bottom of the rotating handle 803.

[0071] In the above structure, the measuring component 6 transmits the parameters of the steel bar body 9 to the control panel 3, and the diameter D and material hardness H are obtained through analysis;

[0072] When D≤32mm and H≤15MPa, the hydraulic cold cutting module 805 is automatically selected, and the spacing of the corresponding adjustable cutting blade 8059 and the pressure parameters of the cutting cylinder 8057 are called.

[0073] When D > 32mm or H > 15MPa, the stepper motor 801 switches to the plasma thermal cutting module 806 via the shift fork structure. At the same time, the positions of both the hydraulic cold cutting module 805 and the plasma thermal cutting module 806 can be adjusted (e.g., hydraulic cold cutting module 805 resets → plasma thermal cutting module 806 is in position), synchronously adjusting the torch height and cutting current. After the switching command is output, the steering shift fork can complete the guide switching. The rapid adjustment of the positions of the two modules does not affect continuous processing, and the infrared interlock device avoids interference from malfunctions of the two modules.

[0074] Preferably, the stepper motor 801 is electrically connected to the control panel 3, and a shift fork mechanism is installed in the inner cavity of the stepper motor 801. The weight of the hydraulic cold cutting module 805 is matched with the weight of the plasma thermal cutting module 806. There are two sliders 804, and the two sliders 804 are symmetrically distributed at both ends of the rotating handle 803. The sliders 804 are located on the inner wall of the slide groove 11 and slide on the inner wall of the slide groove 11. The hydraulic cold cutting module 805 and the plasma thermal cutting module 806 are arranged parallel to each other at the bottom of the circular plate 7.

[0075] In the above structure, the control panel 3 sends a signal to start the stepper motor 801, the rotating rod 802 drives the rotating handle 803 to rotate 180 degrees, and the slider 804 slides along the slide groove 11 to realize the position swap between the hydraulic cold cutting module 805 and the plasma hot cutting module 806; the device integrates dual cutting modules, shares the measurement component 6 and parameter self-adaptation logic, and automatically selects the cutting mode based on the diameter D and the material hardness H (cold cutting is used for thin-diameter ordinary steel bars, and hot cutting is used for thick-diameter high-hardness steel bars), which solves the problem that the single cutting mode of the traditional device cannot cover all scenarios. During the switching process, the parameters are continuously adapted through data linkage adjustment.

[0076] Preferably, the hydraulic cold cutting module 805 includes a square plate 8051. A servo motor 8052 and a limit rod 8053 are fixedly installed on the bottom of the square plate 8051. A lead screw 8054 is fixedly mounted on the power output shaft of the servo motor 8052. A lead screw nut 8055 is threadedly connected to the outer wall of the lead screw 8054. A hydraulic pump 8056 and a cooler 80510 are fixedly installed on the bottom of the lead screw nut 8055. A cutting cylinder 8057 is installed on the bottom of the hydraulic pump 8056. A proportional valve 8058 is installed on the outer wall of the cutting cylinder 8057. An adjustable cutting blade 8059 is fixedly mounted on the telescopic end of the proportional valve 8058. A connecting oil pipe 80511 is installed on the bottom end of the cooler 80510.

[0077] In the above structure, the control panel 3 has a built-in "rebar length-cutting pressure" mapping table, which generates the target pressure based on the real-time length. The signal is converted into a control signal for the proportional valve 8058, which drives the cutting cylinder 8057 to output the corresponding pressure; the pressure sensor collects the actual pressure in real time. This allows control panel 3 to use a fuzzy PID algorithm for adjustment: when At that time, quickly adjust the opening degree;

[0078] Fine-tune when the deviation is less than 0.5 MPa to ensure the pressure remains stable. Within the specified range; when cutting the same specification steel bar three times in a row, if the pressure sensor detects a sudden pressure increase of >2MPa at the moment of cutting, the control panel 3 will automatically increase the target pressure by 5%, and vice versa, by 5%, to extend the service life of the device.

[0079] Preferably, a miniature pressure sensor is installed between the lead screw nut 8055 and the hydraulic pump 8056, and the range of the sensor is 0-500N. There are four servo motors 8052 and four limit rods 8053, and the four servo motors 8052 and limit rods 8053 are evenly distributed at the bottom of the square plate 8051. The servo motors 8052, hydraulic pumps 8056, cutting cylinders 8057, proportional valves 8058 and coolers 80510 are all electrically connected to the control panel 3. The connecting oil pipe 80511 is connected in series with the return oil pipe, and the oil pipe joint adopts a double compression fitting type.

[0080] In the above structure, the control panel 3 generates the target blade spacing based on the rebar length calculated by the measuring component 6. (K represents the reserved clearance) A target position command pulse is sent to the servo motor 8052, corresponding to a lead screw movement of 0.001mm; this causes the servo motor 8052 to drive the lead screw 8054 to rotate, and the lead screw nut 8055 drives the adjustable cutting blade 8059 to move, providing real-time position feedback. ;

[0081] The deviation can then be calculated. And adjust the amount using the PID algorithm in Control Panel 3 until it reaches the target value. Stop; when the miniature pressure sensor detects resistance >300N, it immediately triggers the servo motor 8052 to reverse and triggers an alarm to prevent damage to the motor or lead screw; and the actual value between the adjustable cutting blade 8059 and the receiving plate 10... The actual value of the cutting pressure of the cutting cylinder 8057 The cutting process is only allowed to start after the blade spacing adjustment is completed and the cutting pressure is stable, and the parameters are fed back to the control panel 3 in real time. If any parameter fails to meet the standard, the cutting process will be paused and an alarm will be triggered to ensure the reliability of the processing.

[0082] Preferably, the plasma thermal cutting module 806 includes a fixed shell 8061, a rotary motor 8062 fixedly mounted on the outer wall of the fixed shell 8061, a lead screw 8063 fixedly mounted on the power output shaft of the rotary motor 8062, a slide rail 8064 fixedly mounted on the inner wall of the fixed shell 8061, a lead screw nut 8065 threadedly connected to the outer wall of the lead screw nut 8063, a frame 8066 fixedly mounted on the outer wall of the lead screw nut 8065, a small motor 8067 fixedly mounted on the top of the frame 8066, and a power output shaft of the small motor 8067 fixedly mounted on... It is equipped with a lead screw 3 8068, and a lead screw nut 3 8069 is threadedly connected to the outer wall of the lead screw 3 8068. A vertical plate 80610 is fixedly installed on the outer wall of the lead screw nut 3 8069. A limit block 80611 is fixedly installed on one end of the vertical plate 80610. A plasma power supply 80612 is fixedly assembled on the other end of the vertical plate 80610. A heat dissipation hole 80613 is opened on the top of the plasma power supply 80612. A flow regulating valve 80614 is installed on the outer wall of the plasma power supply 80612. A cutting gun 80615 is installed at the bottom of the plasma power supply 80612.

[0083] In the above structure, the fixed shell 8061 provides overall protection for the plasma thermal cutting module 806. The rotating motor 8062 drives the second lead screw 8063 to rotate, and the second lead screw nut 8065 moves laterally along the slide rail 8064, which drives the frame 8066 and the cutting gun 80615 to adjust left and right. The small motor 8067 drives the third lead screw 8068 to rotate, and the third lead screw nut 8069 drives the vertical plate 80610 to rise and fall, realizing the height adjustment of the cutting gun 80615. The limit block 80611 limits the rising and falling stroke of the vertical plate 80610 to avoid excessive movement and damage to the components. The heat dissipation hole 80613 dissipates heat for the plasma power supply 80612, and the flow regulating valve 80614 controls the flow of working gas to ensure the stability of the cutting arc.

[0084] Preferably, the rotating motor 8062, the small motor 8067, the plasma power supply 80612, and the flow regulating valve 80614 are all electrically connected to the control panel 3. The top of the fixed housing 8061 is fixedly connected to one end of the bottom of the rotating handle 803. A tungsten electrode is embedded in the center of the cutting gun 80615. The frame 8066 is made of 304 stainless steel.

[0085] In the above structure, the frame 8066 is made of 304 stainless steel, which has good high-temperature radiation resistance and prevents deformation from high-temperature baking during the cutting process; the plasma power supply 80612 provides stable and adjustable DC power to the cutting gun 80615, enabling ionized gas to form and maintain plasma arc combustion; the tungsten electrode embedded in the cutting gun 80615 is resistant to high temperature and ablation, effectively extending its service life; the control panel 3 synchronously controls the rotating motor 8062 and the small motor 8067 to achieve precise adjustment of the horizontal and vertical direction of the cutting gun 80615, adapting to the cutting needs of different steel bar bodies 9.

[0086] Working principle:

[0087] 1. During use, the main body 9 of the reinforcing bar is placed on the inner wall of the two sets of measuring components 6. The control panel 3 sends a signal to start the electric telescopic cylinder 602. The telescopic rod 603 adjusts the pulley 609 to clamp the main body 9 of the reinforcing bar. The pulley 609 clamps the main body 9 of the reinforcing bar through the arc groove 610 and conveys it forward, which avoids slippage and prevents excessive compression and deformation. The incremental rotary encoder 617 collects the number of rotations of the pulley 609, and the linear displacement sensor 618 collects the distance d between the axis of the pulley 609 and the main body 9 of the reinforcing bar in real time. The data is synchronously transmitted to the control panel 3.

[0088] Second, the drive motor 612 drives the steel bar body 9 to the cutting assembly 8 at a preset speed. The incremental rotary encoder 617 records the number of rotations N of the pulley 609 in real time, and the estimated length is obtained by combining it with the initial circumference C0. The actual radius of pulley 609 is calculated using the real-time distance d. To obtain the actual perimeter The data can then be uploaded to the control panel 3;

[0089] Third, the control panel 3 uses the real-time distance d and the preset wheel radius R to back-calculate the diameter of the main body 9 of the steel bar using the geometric formula D=2 (dR), and takes the average value of the data from three sets of measuring components 6; when cutting steel bars for the first time or switching batches, the drive motor 612 drives the pulley 609 to rotate so that the steel bar is slowly pre-conveyed. The miniature pressure sensor of the hydraulic cold cutting module 805 collects the simulated shearing force, back-calculates the material hardness H, and generates the characteristic parameter of "diameter D + hardness H" as the basis for selecting the cutting mode;

[0090] IV. When D≤32mm and H≤15MPa, select the hydraulic cold cutting module 805, and control panel 3 generates the target blade spacing. (K represents the reserved clearance). The servo motor 8052 drives the lead screw 8054 to rotate, and the lead screw nut 8055 drives the adjustable cutting blade 8059 to adjust to the correct position, while providing real-time feedback on the current position. The cutting cylinder 8057 outputs corresponding pressure under the control of the proportional valve 8058 to complete the cutting.

[0091] When D > 32mm or H > 15MPa, the stepper motor 801 switches to the plasma thermal cutting module 806 via the shift fork structure. The rotating motor 8062 drives the lead screw 8063 to rotate, the lead screw nut 8065 drives the frame 8066 to move laterally, the small motor 8067 drives the lead screw 8068 to rotate, the lead screw nut 8069 drives the vertical plate 80610 to rise and fall, the cutting gun 80615 is adjusted to the appropriate position, the plasma power supply 80612 is started, the flow regulating valve 80614 regulates the gas flow, and the cutting gun 80615 generates a plasma arc to complete the cutting.

[0092] 5. During the cutting process, the hydraulic cold cutting module 805 calls the parameter library according to the length, so that the distance between the adjustable cutting blade 8059 and the receiving plate 10 is adjusted to the preset value, and the cutting pressure of the cutting cylinder 8057 is adjusted to the corresponding value through the proportional valve 8058.

[0093] The plasma thermal cutting module 806 adjusts the current and gas parameters according to the length, so that the cutting current reaches the preset value, thereby completing the cutting of the steel bar body 9.

[0094] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0095] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steel bar cutting device for building construction, comprising a base (1), characterized in that: A vertical plate (2) is fixedly installed on the top of the base (1). A support frame (4) is installed on the end of the vertical plate (2) away from the control panel (3). A ring frame (5) is fixedly installed on the top of the support frame (4). A measuring component (6) is provided on the inner wall of the ring frame (5). A steel bar body (9) is provided at the center of the ring frame (5). The measuring component (6) includes a fixed plate (601), an electric telescopic cylinder (602) is mounted on the outer wall of the fixed plate (601), a telescopic rod (603) is mounted on the telescopic end of the electric telescopic cylinder (602), and a linear displacement sensor (618) is mounted on the bottom of the electric telescopic cylinder (602). A mounting plate (605) is mounted on the bottom of the telescopic rod (603), and a connecting plate (607) is mounted on the inner wall of the mounting plate (605) by mounting bolts (606). A clamping block (608) is fixedly mounted on the bottom of the connecting plate (607). A horizontal plate (611) is fixedly installed on the outer wall of the 608. A drive motor (612) is embedded in the inner cavity of the horizontal plate (611). An active bevel gear (613) is fixedly mounted on the power output shaft of the drive motor (612). A driven bevel gear (614) meshes with the bottom of the active bevel gear (613). A connecting gear (615) is installed on the outer wall of the driven bevel gear (614). A rotating shaft (616) is fixedly mounted at the center of the connecting gear (615). An incremental rotary encoder (617) is installed at the end of the rotating shaft (616). Three sets of measuring components (6) are installed on the inner wall of the ring frame (5). The electric telescopic cylinder (602), mounting bolt (606), incremental rotary encoder (617) and linear displacement sensor (618) are all electrically connected to the control panel (3). The three sets of measuring components (6) are arranged in a ring at a fixed angle of 120° on the inner wall of the ring frame (5). The electric telescopic cylinder (602) is fixedly installed on the inner wall of the ring frame (5) by a fixing plate (601). In use, the main body of the steel bar (9) is placed on the inner wall of the two sets of measuring components (6). The electric telescopic cylinder (602) is activated by sending a signal through the control panel (3), so that the telescopic rod (603) adjusts the pulley (609) according to the main body of the steel bar (9) to abut and clamp it. The pulley (609) clamps the main body of the steel bar (9) through the arc groove (610) and conveys it forward, which avoids slippage and prevents excessive compression and deformation. At this time, the incremental rotary encoder (617) collects the number of rotations of the pulley (609), and the linear displacement sensor (618) collects the distance d between the axis of the pulley (609) and the main body of the steel bar (9) in real time, and transmits the data synchronously to the control panel (3). The drive motor (612) drives the main body of the steel bar (9) to the cutting component (8) at a preset speed. The linear displacement sensor (618) and the electric telescopic cylinder (602) move synchronously and collect displacement data in real time, which can dynamically adapt to the clamping adjustment of steel bar bodies (9) of different lengths.

2. The steel bar cutting device for building construction according to claim 1, characterized in that: The inner wall of the electric telescopic cylinder (602) is slidably connected to a guide rod (604), and the bottom of the connecting plate (607) is fixedly fitted with a clamping block (608). The inner wall of the clamping block (608) is rotatably connected to a pulley (609), and the outer wall of the pulley (609) is provided with an arc-shaped groove (610).

3. The steel bar cutting device for building construction according to claim 1, characterized in that: The outer wall of the upright plate (2) is fixedly fitted with a control panel (3), the inner wall of the control panel (3) is fixedly clamped with a circular plate (7), the top of the circular plate (7) is provided with a cutting component (8), the top of the base (1) is fixedly installed with a receiving plate (10), the inner wall of the circular plate (7) is provided with a sliding groove (11), and the cross-section of the sliding groove (11) is in the shape of an "I".

4. A steel bar cutting device for building construction according to claim 3, characterized in that: The cutting assembly (8) includes a stepper motor (801), a rotating rod (802) is fixedly mounted on the power output shaft of the stepper motor (801), a rotating handle (803) is fixedly sleeved on the outer wall of the rotating rod (802), a slider (804) is fixedly installed on the top of the rotating handle (803), and a hydraulic cold cutting module (805) and a plasma thermal cutting module (806) are respectively provided at the bottom of the rotating handle (803).

5. A steel bar cutting device for building construction according to claim 4, characterized in that: The stepper motor (801) is electrically connected to the control panel (3), and the inner cavity of the stepper motor (801) is equipped with a shift fork mechanism. The weight of the hydraulic cold cutting module (805) is matched with the weight of the plasma thermal cutting module (806). There are two sliders (804), and the two sliders (804) are symmetrically distributed at both ends of the rotating handle (803). The sliders (804) are located on the inner wall of the slide groove (11), and the sliders (804) slide on the inner wall of the slide groove (11). The hydraulic cold cutting module (805) and the plasma thermal cutting module (806) are arranged parallel to each other at the bottom of the circular plate (7).

6. A steel bar cutting device for building construction according to claim 5, characterized in that: The hydraulic cold cutting module (805) includes a square plate (8051). A servo motor (8052) and a limit rod (8053) are fixedly installed on the bottom of the square plate (8051). A lead screw (8054) is fixedly mounted on the power output shaft of the servo motor (8052). A lead screw nut (8055) is threadedly connected to the outer wall of the lead screw (8054). A hydraulic pump (8056) and a cooler (80510) are fixedly installed on the bottom of the lead screw nut (8055). A cutting cylinder (8057) is installed on the bottom of the hydraulic pump (8056). A proportional valve (8058) is installed on the outer wall of the cutting cylinder (8057). An adjustable cutting blade (8059) is fixedly mounted on the telescopic end of the proportional valve (8058). A connecting oil pipe (80511) is installed at the bottom of the cooler (80510).

7. A steel bar cutting device for building construction according to claim 6, characterized in that: A miniature pressure sensor is installed between the lead screw nut (8055) and the hydraulic pump (8056), and the range of the sensor is 0-500N. There are four servo motors (8052) and four limit rods (8053), and the four servo motors (8052) and limit rods (8053) are evenly distributed at the bottom of the square plate (8051). The servo motors (8052), hydraulic pumps (8056), cutting cylinders (8057), proportional valves (8058) and coolers (80510) are all electrically connected to the control panel (3). The connecting oil pipe (80511) is connected in series with the return oil pipe, and the oil pipe joint adopts a double compression fitting type.

8. A steel bar cutting device for building construction according to claim 7, characterized in that: The plasma thermal cutting module (806) includes a fixed shell (8061), a rotary motor (8062) is fixedly mounted on the outer wall of the fixed shell (8061), a lead screw (8063) is fixedly mounted on the power output shaft of the rotary motor (8062), a slide rail (8064) is fixedly mounted on the inner wall of the fixed shell (8061), a lead screw nut (8065) ​​is threadedly connected to the outer wall of the lead screw (8063), a frame (8066) is fixedly mounted on the outer wall of the lead screw nut (8065), a small motor (8067) is fixedly mounted on the top of the frame (8066), and the power output shaft of the small motor (8067) is fixedly mounted on... There is a lead screw three (8068), and a lead screw nut three (8069) is threadedly connected to the outer wall of the lead screw three (8068). A vertical plate (80610) is fixedly installed on the outer wall of the lead screw nut three (8069). A limit block (80611) is fixedly installed at one end of the vertical plate (80610). A plasma power supply (80612) is fixedly assembled at the other end of the vertical plate (80610). A heat dissipation hole (80613) is opened on the top of the plasma power supply (80612). A flow regulating valve (80614) is installed on the outer wall of the plasma power supply (80612). A cutting gun (80615) is installed at the bottom of the plasma power supply (80612).

9. A steel bar cutting device for building construction according to claim 8, characterized in that: The rotating motor (8062), the small motor (8067), the plasma power supply (80612), and the flow regulating valve (80614) are all electrically connected to the control panel (3). The top of the fixed shell (8061) is fixedly connected to the bottom end of the rotating handle (803). A tungsten electrode is embedded in the center of the cutting gun (80615). The frame (8066) is made of 304 stainless steel.

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