A house building construction steel bar processing and cutting device

Abstract

The utility model relates to a reinforcing bar processing technical field especially relates to a house building construction reinforcing bar processing cutting device, including frame, feeding unit, stress wave detection unit, cutting unit and scribe unit, the utility model discloses stress wave internal detection, fixed length cutting and preset mark function are integrated in the same equipment, and the quality detection and geometric processing are realized in one processing process. Among them, stress wave detection unit adopts the identification reinforcing bar internal defect of knocking excitation and symmetry sensing technology, and data acquisition component still includes memory and PLC controller, is used for storing vibration amplitude and carries out comparison and analysis. Cutting unit executes fixed length cutting according to preset length, and scribe unit completes position mark according to independent instruction. The utility model solves the problem that the prior art needs multiple equipment step-by-step operation, and the automation level and comprehensive efficiency of reinforcing bar processing are improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of steel bar processing technology, and in particular to a steel bar processing and cutting device for building construction. Background Technology

[0002] In the field of building structural safety, steel reinforcement, as a primary load-bearing material, directly affects the structural safety and service life of buildings. In actual engineering projects, during production, transportation, and storage, steel reinforcement is prone to developing hidden defects such as microscopic cracks, slag inclusions, and voids. These defects significantly reduce the mechanical properties of the steel reinforcement, creating serious safety hazards. However, existing steel reinforcement processing equipment is limited in function and lacks integrated solutions. This results in internal inspection, length cutting, and construction marking of the steel reinforcement requiring separate steps using different equipment, leading to cumbersome processes, multiple clamping operations, and low overall efficiency.

[0003] Chinese patent CN118371629A discloses an "automated equidistant cutting device for steel bar processing." Its core technology lies in achieving mechanical length positioning through a movable length-fixing baffle, combined with feeding rollers and a cutting mechanism, to complete the automatic conveying and fixed-length cutting of steel bars. This solution represents the current mainstream technical approach in this field, aiming to "improve the automation level of conveying and cutting actions," but it fails to solve the problem of "material intrinsic quality control."

[0004] Currently, the detection of internal defects in reinforcing bars mainly relies on sampling inspections in a laboratory environment, such as ultrasonic testing and radiographic testing. These methods cannot be applied to online inspections at construction sites or processing workshops, leading to reinforcing bars with internal defects being mistakenly used in building structures, posing potential safety risks. Summary of the Invention

[0005] Therefore, this utility model provides a steel bar processing and cutting device for building construction, which overcomes the problems of cumbersome processing procedures and low efficiency caused by the single function of the equipment and the need for multiple clamping and step-by-step operations in the prior art.

[0006] To achieve the above objectives, this utility model provides a steel bar processing and cutting device for building construction, comprising: frame; A feeding unit, installed on the frame, is used to convey steel bars; The stress wave detection unit, mounted on the frame, includes a striking component for striking the reinforcing bar to generate a vibration wave and a data acquisition component for acquiring the vibration wave of the reinforcing bar. The cutting unit, mounted on the frame, is used to perform a fixed-length cutting operation according to a preset target length.

[0007] Furthermore, the steel bar processing and cutting device for building construction also includes a marking unit, which is used to mark the processing position / construction instruction position on the surface of the steel bar.

[0008] Furthermore, the scribing unit includes: A movable component is mounted on the frame and has a slide rail that can move along the movement path of the reinforcing bars and a drive motor that drives the movable component. A marking component, mounted on the movable component, is used to mark the surface of the reinforcing bar.

[0009] Furthermore, the striking assembly includes a driving mechanism and a striking element driven by the driving mechanism. The striking element moves radially toward the reinforcing bar under the drive of the driving mechanism to perform a striking operation to strike the reinforcing bar. Furthermore, the stress wave detection unit also includes a clamping and fixing part, which is disposed on both sides of the striking member and is used to fix the two ends of the steel bar when striking the steel bar.

[0010] Furthermore, the data acquisition component includes multiple sets of sensors, which are symmetrically fixed in pairs on the frame on both sides of the striking element to obtain the vibration amplitude at various positions of the reinforcing bar.

[0011] Furthermore, the feeding unit includes a servo motor-driven conveying roller assembly and an encoder for detecting conveying displacement.

[0012] Furthermore, the cutting unit includes a high-rigidity frame and a cutting saw blade feeding system driven by a servo motor.

[0013] Furthermore, the data acquisition component also includes: A memory is used to store the vibration amplitude values ​​at various locations on the reinforcing bar after being struck. The PLC controller, which is connected to the memory, is used to compare the vibration amplitude with a preset threshold to generate a comparison result.

[0014] Furthermore, the marking assembly is a spray-on marker or a mechanical scribing marker.

[0015] Compared with the prior art, the beneficial effect of this utility model is that by integrating the feeding unit, stress wave detection unit and cutting unit, it can not only complete physical cutting, but also actively detect micro-defects (such as cracks and slag inclusions) inside the steel bars using stress wave technology, thus realizing the functional integration of simultaneously completing quality inspection and geometric processing on the same equipment.

[0016] Furthermore, this invention, by setting up a marking unit, possesses the ability to automatically and accurately mark the surface of reinforcing bars. By moving the marking component, the marking unit can complete the marking on the reinforcing bar surface according to preset instructions, providing a visual benchmark for subsequent construction procedures, avoiding errors from manual marking, and improving the standardization and efficiency of the overall operation.

[0017] Furthermore, this utility model achieves non-destructive detection and location of microscopic defects (such as cracks and slag inclusions) inside steel bars through a stress wave detection unit. The data acquisition component includes a memory and a PLC controller, which can store the collected vibration amplitude values ​​and perform comparative analysis. By generating standardized stress wave excitation through the striking component, combined with the stable waveform propagation environment established by the clamping and fixing part, the automatic identification of internal defects is effectively realized, overcoming the randomness error of manual detection.

[0018] Furthermore, the feeding unit and cutting unit of this invention constitute a high-precision execution system. The feeding unit, through the cooperation of a servo motor and a high-precision encoder, achieves millimeter-level precise positioning of the steel bar conveying, establishing an accurate spatial coordinate reference for stress wave detection and defect location; the cutting unit adopts a high-rigidity frame and a servo motor-driven feeding system, ensuring the dynamic stability and repeatability of the cutting process, and improving processing accuracy.

[0019] Furthermore, through coordination and cooperation, the various functional units have achieved automated processing of the entire steel bar processing process, thereby improving the operational efficiency and reliability of the entire processing system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the steel bar processing and cutting device for building construction according to this utility model; Figure 2 This is a schematic diagram of the stress wave detection unit structure of this utility model; Figure 3 This is a schematic diagram of the scribing unit structure of this utility model; Figure 4 This is a flowchart illustrating the process of the steel bar processing and cutting device for building construction according to this utility model. In the diagram: 1-Feeding unit, 2-Stress wave detection unit, 3-Frame guide rail, 4-Scribing unit, 5-Cutting unit, 201-Tapping component, 202-Data acquisition component, 203-Clamping and fixing part, 401-Moving component, 402-Scribing component. Detailed Implementation

[0021] To make the objectives and advantages of this utility model clearer, the utility model will be further described below with reference to the embodiments; it should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0022] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0023] It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0024] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection of components within two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Please see Figure 1 and Figure 4 As shown, Figure 1 This is a schematic diagram of the overall structure of the steel bar processing and cutting device for building construction according to this utility model; Figure 4 This is a flowchart illustrating the process of the steel bar processing and cutting device for building construction according to this utility model. Specifically, this utility model integrates a comprehensive processing system that combines automated conveying, internal non-destructive quality inspection, high-precision fixed-length cutting, and preset position marking. Its core design concept lies in modular design, concentrating processes that traditionally require multiple machines and multiple clamping operations into a single machine for continuous completion, thereby greatly improving the automation level, production efficiency, and quality control of rebar processing. This embodiment of the rebar processing and cutting device for building construction includes: Feeding unit 1 is used to transport steel bars; The stress wave detection unit 2 includes a striking component 201 for striking the steel bar to generate a vibration wave and a data acquisition component 202 for acquiring the vibration wave of the steel bar. Cutting unit 5 is used to perform cutting operations.

[0026] In one specific embodiment, each unit is integrated on a unified frame through a mechanical structure, and the functional units coordinate their work through preset mechanical linkages and electrical signal interactions.

[0027] Specifically, the frame is welded from structural steel, providing a stable mounting foundation for each functional unit and ensuring the overall structural accuracy. Preferably, the frame is equipped with guide rails and positioning baffles along the rebar conveying direction for initial centering and axial limiting of the rebar, ensuring consistent position of the rebar during conveying and testing.

[0028] Preferably, to ensure operational safety, a mesh metal protective cover is bolted to the outside of the moving parts such as the conveyor roller group and the cutting unit 5, as well as the hazardous areas. This protective cover effectively prevents the operator's hands or clothing from being accidentally caught. Simultaneously, an interlock switch is installed at the maintenance door of the protective cover. When the protective cover is opened, this switch immediately cuts off the main power supply to the servo drive system and applies emergency braking to the system, ensuring the safety of maintenance operations.

[0029] Preferably, the frame incorporates a sealing design for key components, employing a dual sealing structure combining a seal and a rubber oil seal at the bearing housing of the conveyor roller assembly. This effectively prevents dust intrusion and extends the bearing's service life.

[0030] In one specific embodiment, the feeding unit 1 includes at least one set of conveying rollers driven by a servo drive system and a high-precision encoder disposed on one side of the conveying roller set. The conveying roller set includes a driving roller and a driven roller. The driving roller is driven by the output shaft of a servo motor, and the driven roller is disposed opposite to the driving roller via an elastic pressing mechanism to clamp and convey the reinforcing bar. The high-precision encoder is coaxially connected to either the driving roller or the driven roller and is used to detect the rotation angle or number of revolutions of the roller in real time. The system calculates the actual conveying displacement of the reinforcing bar based on the encoder signal. This is prior art and will not be described in detail here.

[0031] Please see Figure 2 As shown, this is a schematic diagram of the stress wave detection unit structure of this utility model. Specifically, the stress wave detection unit 2 includes a striking component 201, a data acquisition component 202, and a clamping and fixing part 203.

[0032] It is understood that the striking assembly 201 includes a driving mechanism, a striking element driven by the driving mechanism and movable radially toward the reinforcing bar to perform striking, and a clamping and fixing part 203 for fixing the two ends of the reinforcing bar.

[0033] Specifically, the striking assembly 201 includes a high-response-speed servo electric cylinder as a drive mechanism and a carbide hammer head driven by the drive mechanism to move radially toward the rebar to perform striking. The striking component is connected to the frame via a linear guide or high-precision slide rail, allowing it to move with high repeatability and precision along the radial direction of the rebar under the drive mechanism (such as a motor), and to perform a controllable instantaneous striking upon contact with the rebar surface. The clamping and fixing parts 203 are respectively located on both sides of the rebar conveying path, using hydraulically or pneumatically driven V-shaped clamps, which can firmly clamp the two sides of the rebar symmetrically along the striking component during detection, forming stable boundary conditions. This ensures that the position, angle, and impact energy of each strike are highly consistent, thereby generating a reproducible and known initial stress wave signal. This "controllable instantaneous striking" is the basis for subsequent stress wave detection, avoiding signal discrimination errors caused by inconsistent excitation sources. This allows the stress wave detection unit 2 to ensure accurate execution of the striking action while avoiding rigid interference with the rebar surface.

[0034] In one specific embodiment, the data acquisition component 202 includes 4 to 8 sets of sensors. These sensors can be high-sensitivity vibration sensors, piezoelectric accelerometers, or acoustic emission sensors. The sensors are symmetrically mounted in pairs on the frames on both sides of the striking element to obtain the vibration amplitude at various locations on the reinforcing bar. At the instant the striking action is triggered, all sensors activate synchronously to acquire vibration signals during the propagation of stress waves along the length of the reinforcing bar at a high frequency.

[0035] It is understandable that when stress waves propagate in a uniform, continuous, and dense elastic material, their energy attenuation, such as amplitude reduction and propagation speed, is relatively stable. When the wavefront encounters defects such as internal cracks, inclusions, abrupt changes in cross-section, bending, or uneven structure, some of the wave energy will be reflected and scattered at the defect interface, resulting in a significant reduction in the amplitude of the stress wave propagating to the other side of the defect, and changes in its wave speed and waveform.

[0036] In this embodiment, the stress wave detection unit 2 quickly identifies stress wave abrupt change points by directly comparing the characteristics of the stress wave signal measured in real time with the "standard waveform feature database" of qualified steel bars pre-stored in the system. The system has pre-established a standard stress wave signal database of qualified steel bars of the same type and specification, which includes key characteristic parameters such as standard waveform shape, vibration duration and symmetry.

[0037] For HRB400E steel bars with a diameter of 25mm, The waveform shape is significantly distorted, and the real-time waveform shows abnormal peaks and troughs compared with the standard waveform; The duration of vibration was significantly shortened, and the decay rate exceeded the standard range by 40%. Significant differences in signal characteristics were observed at symmetrical locations, with waveform similarity at symmetrical measurement points being less than 60%. This method, based on direct waveform comparison and feature threshold determination, avoids complex full waveform inversion calculations and enables rapid identification of stress wave abrupt changes. It ensures detection efficiency while establishing reasonable tolerances based on extensive statistical experience, effectively reducing system misjudgments. It should be understood that the aforementioned judgment thresholds are not fixed and can be adjusted in practical applications based on historical statistical data for different rebar types and specifications to achieve optimal detection results; details will not be elaborated upon here.

[0038] In one specific implementation, the data acquisition component further includes a memory and a PLC controller, wherein the memory is used to store the vibration amplitude values ​​at various locations of the steel bar obtained after being struck; the PLC controller is connected to the memory and is used to compare the vibration amplitude values ​​with a preset threshold to generate a comparison result.

[0039] The PLC controller is used to extract feature values ​​such as waveform morphology, vibration decay rate and correlation of symmetrical point signals, and to compare the similarity by calculating the cross-correlation coefficient between the measured spectrum and the pre-stored standard spectrum; when the correlation coefficient is lower than a preset threshold, it is determined to be a defect.

[0040] Please see Figure 3 As shown, this is a schematic diagram of the marking unit structure of this utility model; specifically, the marking unit 4 includes a moving component 401 and a marking component 402. The moving component 401 is provided with a slide rail that can move along the moving path of the reinforcing bar and a drive motor that drives the moving component 401; the marking component 402 is disposed on the moving component 401 and is used to mark on the surface of the reinforcing bar.

[0041] It is understood that the marking unit 4 can be equipped with two different types of markers, depending on the site requirements and the durability requirements of the marking, including: The spray-type marker uses a non-contact working principle. It precisely controls the spray gun through a solenoid valve to spray environmentally friendly quick-drying paint onto the surface of steel bars, forming bright and eye-catching colored marks. It has the advantages of being non-contact, fast, and having good visual recognition. Mechanical scriber marks a permanent indentation mark on the surface of a rebar by a pneumatic or electric drive of a carbide scriber. They are wear-resistant and durable, and can withstand friction, collision and weather effects during subsequent handling, storage and construction, ensuring that the mark remains clearly legible throughout the construction period.

[0042] The cutting unit 5 includes a high-rigidity frame and a cutting saw blade feeding system driven by a servo motor. The main body of the cutting unit 5 is a high-rigidity portal or C-shaped frame structure, and its core cutting component is mounted on a feeding system driven by a servo motor and a ball screw.

[0043] Specifically, the system controls the feed servo motor according to the preset target length command, drives the saw blade to move to the predetermined cutting point coordinates, and performs precise cutting. The fully servo-controlled feed system ensures the repeatability and positioning accuracy of the cutting point.

[0044] Understandably, cutting unit 5 is fully integrated with the safety circuit of the entire system. Its working area is enclosed within a safety shield and equipped with an interlocking device to ensure that cutting can only be initiated when the shield is completely closed.

[0045] The technical solution of this utility model has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A steel bar processing and cutting device for building construction, characterized in that, include: frame; A feeding unit, installed on the frame, is used to convey steel bars; The stress wave detection unit, mounted on the frame, includes a striking component for striking the reinforcing bar to generate a vibration wave and a data acquisition component for acquiring the vibration wave of the reinforcing bar. The cutting unit, mounted on the frame, is used to perform a fixed-length cutting operation according to a preset target length.

2. The steel reinforcement processing and cutting device for building construction according to claim 1, characterized in that, It also includes marking units, which are used to mark the processing location / construction instruction location on the surface of the reinforcing bars.

3. The steel reinforcement processing and cutting device for building construction according to claim 2, characterized in that, The scribing unit includes: A movable component is mounted on the frame and has a slide rail that can move along the movement path of the reinforcing bars and a drive motor that drives the movable component. A marking component, mounted on the movable component, is used to mark the surface of the reinforcing bar.

4. The steel reinforcement processing and cutting device for building construction according to claim 1, characterized in that, The striking assembly includes a driving mechanism and a striking element driven by the driving mechanism. The striking element moves radially toward the reinforcing bar under the drive of the driving mechanism to perform a striking operation to strike the reinforcing bar.

5. The steel reinforcement processing and cutting device for building construction according to claim 4, characterized in that, The stress wave detection unit also includes a clamping and fixing part, which is disposed on both sides of the striking member and is used to fix the two ends of the steel bar when striking the steel bar.

6. The steel reinforcement processing and cutting device for building construction according to claim 5, characterized in that, The data acquisition component includes multiple sets of sensors, which are symmetrically fixed in pairs on the frame on both sides of the striking element to obtain the vibration amplitude at various positions of the reinforcing bar.

7. The steel reinforcement processing and cutting device for building construction according to claim 1, characterized in that, The feeding unit includes a servo motor-driven conveying roller assembly and an encoder for detecting conveying displacement.

8. The steel reinforcement processing and cutting device for building construction according to claim 1, characterized in that, The cutting unit includes a high-rigidity frame and a cutting saw blade feeding system driven by a servo motor.

9. The steel reinforcement processing and cutting device for building construction according to claim 1, characterized in that, The data acquisition component also includes: A memory is used to store the vibration amplitude values ​​at various locations on the reinforcing bar after being struck. The PLC controller, which is connected to the memory, is used to compare the vibration amplitude with a preset threshold to generate a comparison result.

10. The steel reinforcement processing and cutting device for building construction according to claim 3, characterized in that, The marking assembly is a spray-type marker or a mechanical scribing marker.

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