869 results about "Steel bar" patented technology

The invention discloses a large-model-based steel bar engineering quality detection method, system and equipment and a medium, and relates to the technical field of data processing. The method comprises the following steps: acquiring vibration response data and three-dimensional point cloud data of a to-be-detected reinforcement project; inputting the vibration response data into a pre-trained vibration characteristic analysis model to obtain a stress distribution map and a stress transmission path, and performing segmentation processing on the three-dimensional point cloud data along the stress transmission direction to obtain segmented point cloud data; based on the segmented point cloud data, extracting morphological characteristics of each section of reinforcing steel bar in the to-be-detected reinforcing steel bar project, and establishing a stress-geometry coupled digital twinborn model according to the stress distribution map and the morphological characteristics; performing dynamic mapping on the digital twinborn model and a pre-calibrated BIM design model, and determining steel bar deformation parameters of the stress abnormal region; and based on the steel bar deformation parameters, generating a quality detection report of the to-be-detected steel bar project. By implementing the technical scheme provided by the invention, the accuracy of reinforcing steel bar engineering quality detection can be improved.

The invention relates to the technical field of bridge engineering structure health monitoring, in particular to a service life prediction method and system for a bridge connection part, and the method comprises the steps: collecting the strain of a grouting sleeve, a reinforcement-grouting interface ultrasonic reflection signal and environment temperature and humidity data through a distributed sensor array; a three-dimensional dynamic void rate model is generated through fusion of a spatial topological mapping algorithm, a correlation function of load circulation and void expansion is established, the dynamic void rate is input into a bond strength coupling degradation model, after strength attenuation is quantized in combination with steel bar corrosion data and bond failure early warning is triggered, stress redistribution is calculated through multi-physics coupling simulation, and the dynamic void rate is obtained. Early warning is taken as a starting node, the actual load spectrum and temperature and humidity data are combined, Monte Carlo sampling is adopted to simulate rigidity degradation and output the residual life probability, the system comprises a multi-source collaborative sensing unit, a micro-void evolution analysis unit and a life prediction decision unit, and the safety control precision of bridge connection parts is improved.

The invention relates to the technical field of material metallurgy, and discloses high-wear-resistance hot-rolled round steel for titanium-containing steel balls and a preparation method thereof.The round steel comprises 0.60%-0.67% of C, 1.40%-1.60% of Si, 0.70%-0.90% of Mn, smaller than or equal to 0.020% of P, smaller than or equal to 0.015% of S, 0.70%-0.90% of Cr, 0.10%-0.15% of Ti, smaller than or equal to 0.30% of Ni, smaller than or equal to 0.40% of Cu, smaller than or equal to 0.05% of Al, smaller than or equal to 0.0020% of O, smaller than or equal to 0.0002% of H and smaller than or equal to 0.0035% of N; and the balance of Fe and inevitable impurities. Through the high-titanium-low-nitrogen microalloying design, the technical contradiction that the toughness is remarkably reduced when the strength and the hardness of traditional high-carbon steel ball steel are improved is solved, and excellent synergistic improvement of the strength, the hardness and the toughness is achieved.

The utility model discloses a cutting device for non-magnetic steel bar production, and relates to the technical field of non-magnetic steel production, the cutting device comprises a processing table, the top of the processing table is fixedly connected with a U-shaped first support, the inner side of the top of the first support is fixedly connected with an electric sliding rail, and the bottom of the electric sliding rail is slidably connected with a movable plate; a second motor is arranged to drive the rotating wheels to rotate, bars are conveyed forwards through pressure generated when the two rotating wheels rotate, then the first motor drives the saw blade to rotate, the saw blade is driven by the second motor to rotate, and therefore the bars can be conveyed forwards. And the electric sliding rail drives the first motor and the saw blade to transversely move to cut the bar, and when the saw blade completely passes through the bar to complete cutting, the electric sliding rail drives the first motor and the saw blade to move in the direction to conduct cutting again, so that the action stroke of the saw blade is shortened, time consumed by single-time cutting is shortened, and the machining efficiency is improved.

The utility model discloses a high-precision steel bar positioning assembly which comprises a positioning plate, a positioning hole is formed in the positioning plate, and a positioning nut is arranged above the positioning hole. The device further comprises a variable-diameter bolt, the variable-diameter bolt is screwed with the positioning nut and the transition sleeve, and the bottom of the transition sleeve is provided with a threaded head located at the end of the steel bar to be positioned. The utility model has the characteristic of effectively ensuring the position accuracy of the reinforcing steel bar.

The invention relates to the technical field of prefabricated part assembly, in particular to an assembly type precision reinforcing steel bar positioning detector which comprises a guide rail, a sliding block sliding on the Y axis is arranged on the guide rail, a sliding rail sliding on the Z axis is arranged on the sliding block, a positioning plate is connected to the sliding rail, and connecting columns are connected to the four corners of the front side of the positioning plate. A fixing plate is jointly connected among the four connecting columns, a plurality of detection rods used for extending into the positioning holes are slidably connected to the positioning plate, the front ends of the detection rods slidably penetrate through the fixing plate, and a mounting mechanism used for mounting the guide rail on the prefabricated part is arranged on the guide rail. The positioning plate clings to the front sides of the prefabricated parts, the detection rods extend into the deepest positions of the positioning holes, the depths of all the positioning holes can be detected at the same time, the rubber blocks fix the positions of the detection rods, the guide rails are installed on the next prefabricated parts, and the rear sides of the positioning plate and the rear sides of the prefabricated parts are aligned by pushing the sliding blocks and the sliding rails. The length of the reinforcing steel bar is quickly compared with the depth of the corresponding positioning hole, and the positioning detection efficiency is improved.

The embedded steel bar hole cleaning device for building reinforcement comprises a mounting base, a moving rod, a moving assembly and a cleaning mechanism, a guide sleeve is fixedly connected to the center of the mounting base in a penetrating mode, the moving rod is slidably connected to the interior of the guide sleeve, and the moving assembly is arranged between one end of the moving rod and the mounting base; the distance between the two sets of collecting and cleaning assemblies is adjusted through the adjusting assembly, so that the collecting and cleaning assemblies move to the position making contact with the inner wall of the steel bar planting hole, then the rotating assembly drives the collecting and cleaning assemblies to rotate in the steel bar planting hole, and the steel bar planting hole is cleaned. The first cleaning brush is used for cleaning powder residues on the inner walls of the bar planting holes, meanwhile, the scraping plate is used for scraping and collecting large-particle sand and stones, the large-particle sand and stones roll into the collecting box along with the scraping plate along with rotation of the scraping plate, the large-particle sand and stones are collected through the collecting box, and the bar planting hole cleaning device is suitable for cleaning the bar planting holes of various sizes and specifications. And the steel bar planting holes are cleaned.

The invention discloses a reinforcing steel bar bending angle detection system and method based on machine vision, a storage medium and a computer program product. The method comprises the following steps: segmenting an acquired reinforcing steel bar image based on an image segmentation model of deep learning to obtain a binary image only containing reinforcing steel bars or an image with reinforcing steel bar contour information; and detecting the binary image only containing the reinforcing steel bar or the image with the reinforcing steel bar contour information to obtain the edge of the reinforcing steel bar and fit a straight line. According to the invention, the bending angle of the reinforcing steel bar can be automatically detected based on machine vision. The image segmentation module can accurately separate out a reinforcing steel bar image, eliminate background interference and provide a basis for subsequent accurate detection; the steel bar contour detection module fits a steel bar edge straight line to facilitate quantitative analysis; the included angle calculation module calculates the bending angle based on the fitting straight line, the detection accuracy and automation degree are improved through the modular design, and compared with traditional manual detection, the efficiency and precision are higher.

The utility model provides a steel bar splitting device, and relates to the field of steel bar splitting devices, the steel bar splitting device comprises a rack and a rotating hub assembly installed in the rack, a steel bar splitting assembly is arranged in the rack, the steel bar splitting assembly comprises a mounting plate, a top splitting piece and a base, the base is installed in the rack, the mounting plate is installed on the side portion of the upper end of the base, and the top splitting piece is installed on the top of the mounting plate. A mounting plate is arranged on the machine frame, the top separating piece is mounted on the mounting plate, the top separating piece is arranged in a triangular shape, the interior of the machine frame is divided into two feeding grooves by the top separating piece, feeding bins are arranged at the two ends of the base, and the feeding bins and the feeding grooves are correspondingly arranged. According to the utility model, steel materials fed into the rack can be distributed to the left side and the right side for feeding through the top separating piece, the base is detachably installed on the rack, later maintenance, replacement and installation are facilitated, after improvement, accidents of the top separating device do not occur, the time for replacing the steel separating assembly is shortened to be less than 30 minutes, and a large amount of time of workers is saved.

The invention relates to a steel seal marking machine for steel bars, which comprises a rack, a storage box for storing the steel bars, a feeding assembly, a transfer assembly, an adjusting assembly and a marking assembly, and the feeding assembly is used for conveying the steel bars in the storage box to the adjusting assembly; the transferring assembly is used for conveying the steel bars on the adjusting assembly to the marking assembly for marking operation, the adjusting assembly comprises a bearing table, an adjusting air cylinder and an abutting block, a V-shaped groove for bearing the steel bars is formed in the upper end face of the bearing table, and the length direction of the adjusting air cylinder is parallel to the extending direction of the V-shaped groove; the adjusting air cylinder and the abutting block are located on the two sides of the bearing table correspondingly, the adjusting air cylinder is used for making one end of the steel bar abut against the abutting block, and the adjusted steel bar can smoothly enter the marking assembly through the transferring assembly. The method has the effects that the participation degree of workers required by equipment is reduced, so that the working intensity of the workers is reduced.

The utility model provides a special steel bar surface grinding device, and belongs to the technical field of grinding. The special steel bar surface grinding device comprises a supporting mechanism and a grinding mechanism, the supporting mechanism comprises a grinding table, a cavity is formed in the center of the top of the grinding table, supporting frames are installed at the positions, on the two sides of the cavity, of the top of the grinding table, steel bars are supported by the tops of the supporting frames, the grinding mechanism comprises a threaded rod, and the threaded rod is rotationally installed in the cavity. A first motor is mounted on one side of the grinding table, the output end of the first motor is in transmission connection with the threaded rod, a sliding block is connected to the outer side of the threaded rod in an engaged mode and slides in the cavity, a connecting disc is mounted at the top of the sliding block, a mounting cavity is formed in the connecting disc, and a rotating shaft is rotationally connected to the interior of the mounting cavity. And a second motor is installed on the outer side of the connecting disc, the output end of the second motor is in transmission connection with the rotating shaft, and a gear is installed on the outer side of the rotating shaft.

The invention belongs to the technical field of engineering detection equipment, and particularly relates to a steel bar bending test device for engineering detection, the steel bar bending test device comprises a device body, a rotating disc, a positioning rod, a bending power source and an adjusting part, the device body is provided with a clamping part, and the clamping part can clamp one end of a steel bar; the rotating disc is arranged on the device body and located on one side of the clamping part, and a fixing rod is arranged in the middle of the rotating disc; the positioning rods and the fixed rods are distributed at intervals in the radial direction of the rotating disc; the bending power source can drive the rotating disc to rotate; the adjusting part can quickly adjust the position of the positioning rod in the radial direction of the rotating disc and slowly adjust the position of the positioning rod in the radial direction of the rotating disc; compared with the prior art, the steel bar bending test device can adjust the distance between the fixing rod and the positioning rod in a large range, has a rapid adjustment process and a slow adjustment process, and is high in adjustment efficiency and adjustment precision.

The invention, which relates to the technical field of information, discloses a BIM and MARL-fused complex structure steel bar intelligent arrangement system comprising a data acquisition module, a three-dimensional modeling module, a feature processing module, a scheme generation module, a scheme optimization module and a scheme output module. The data acquisition module extracts geometric and stress data of the BIM, and a final data set is obtained after preprocessing; the three-dimensional modeling module constructs a three-dimensional structure model through geometric analysis, optimization and standardization algorithms; the feature processing module calculates stress distribution and performs dimension reduction on a feature set; the scheme generation module generates an initial arrangement scheme set through a genetic algorithm; the scheme optimization module obtains a global coordination scheme set through multi-algorithm collaborative optimization; and the scheme output module generates a three-dimensional visual model and BIM compatible arrangement data. According to the method, the problem of arrangement of the reinforcing steel bars with complex structures is solved, and the accuracy and the engineering adaptability of reinforcing steel bar arrangement are improved.

Disclosed in the present invention is a production and preparation method for a steel bar for a steam turbine impeller. The steel bar comprises the following chemical components in percentages by mass: C: 0.31-0.36%, Si: 0.22-0.35%, Mn: 0.45-0.60%, P: ≤0.013%, S: ≤0.008%, Cr: 1.05-1.20%, Ni: ≤0.20%, Cu: ≤0.10%, Mo: 0.21-0.28%, and V: 0.11-0.18%. The method comprises: converter smelting → LF refining → RH refining → continuous casting → a heating furnace heating process → a rolling process → a heat preservation process. The present invention satisfies the quality requirements of a steel bar for a steam turbine impeller, and indexes, such as mechanical properties, a high hardness and a high steel purity, can also satisfy high-standard requirements.

The invention relates to a reinforcing steel bar calculation method and system based on a reinforcing steel bar engineering large model, and belongs to the technical field of constructional engineering digitization. The method comprises the steps that engineering drawings or parameter data uploaded by a user are received and subjected to standardization processing, and standardized engineering data are generated; based on the standardized engineering data, extracting reinforcing steel bar feature information, and generating a reinforcing steel bar feature data set; according to the steel bar feature data set, dynamically matching related rules from a preset calculation rule base, converting the related rules into mathematical constraint formulas, and generating a constraint condition set; inputting the steel bar feature data set and the constraint condition set into a pre-trained steel bar engineering large model for processing, and calculating a steel bar engineering amount to obtain an optimized steel bar amount result; and mapping the steel bar quantity optimization result to a three-dimensional building model to generate a visual steel bar distribution diagram. According to the method, steel bar calculation can be conveniently, rapidly and accurately carried out.

The invention relates to the technical field of reinforcing steel bar cutting, and particularly discloses a reinforcing steel bar processing control system based on digital production, comprising: an initial module for setting a time node; setting an initial speed, and obtaining an initial sequence; the calibration module is used for cutting the reinforcing steel bars at the initial speed V1; after cutting is completed, cutting scores are calculated, and coordinate points are generated; obtaining a new initial sequence, generating new coordinate points, and fitting the coordinate points to obtain a fitted curve; substituting the cutting score threshold into the fitted curve to obtain first speeds, and recording the maximum first speed as a theoretical speed; and the control module is used for acquiring the actual time length, calculating a time difference value and determining a theoretical speed VDY based on the time difference value. The cutting efficiency can be prevented from being reduced while the steel bar notch quality can be ensured.

The utility model relates to the technical field of steel bar corrosion detection, in particular to a steel bar corrosion instrument, which is convenient for adjusting the distance between two detection electrodes, is convenient for workers to use, and comprises a corrosion instrument host, detection electrodes and a grip, each detection electrode is provided with a cable, the cables are connected with the corrosion instrument host, and the grip is connected with the steel bar corrosion instrument host. The device is characterized in that sliding grooves are formed in the two sides of the interior of the grip, a lead screw is arranged in the grip and is a bidirectional lead screw, the screwing directions of threads on the two sides of the lead screw are opposite, the lead screw and the grip are rotationally connected, a screwing block is fixedly arranged in the middle of the lead screw, a mounting groove used for exposing the screwing block is formed in the middle of the grip, and sliding blocks are mounted on the two sides of the lead screw; the sliding blocks and the sliding grooves are in sliding connection, the lead screw and the sliding blocks are connected through threads, each sliding block is provided with a hoop, the grip is provided with a handle, the installation groove is provided with a cover plate, the top of the detection electrode is provided with clamping grooves matched with the hoops, and the outer wall of the grip is provided with scales.

A foldable playard includes a plurality of vertical tubes, a plurality of X-typed frames and a latching mechanism. Each vertical tube includes a bar member, a corner and a slider. The corner is affixed to top of the bar member. The slider is movably disposed on the bar member. Each of the X-typed frames is rotatably connected between two adjacent vertical tubes via the corner and the slider. The latching mechanism includes a latch body and a locking portion. The latch body includes a first end and a second end opposite to each other, and the first end being disposed on the corner of one vertical tube. The locking portion is disposed on the second end. The locking portion is adapted to engage with and disengage from one X-typed frame rotatably connected to the slider on the said vertical tube in response to motion of the latch body.

A steel bar straightening device comprises a base, a guide mechanism and a straightening mechanism are arranged on the base, the guide mechanism is located on the left side of the straightening mechanism, the guide mechanism comprises a set of guide rods arranged in a radial mode, the guide rods form a conical structure, and a left end opening of the conical structure is larger than a right end opening of the conical structure; the left end of the guide rod is fixedly connected with the base through a left supporting piece, and the right end of the guide rod is fixedly connected with the base through a right supporting piece. A guide sleeve used in cooperation with the steel bar is arranged in the right supporting piece. The straightening mechanism comprises a circular steel pipe, and the inner diameter of the circular steel pipe is larger than the diameter of the steel bar. The axis of the guide sleeve and the axis of the circular steel pipe are located on the same straight line. According to the steel bar straightening device, the guide mechanism is additionally arranged, the guide mechanism plays a role in guiding steel bar paying-off, the steel bar cannot crack after being straightened, meanwhile, the steel bar can smoothly enter a subsequent straightening mechanism through the guide function of the guide mechanism, and the phenomenon of machine clamping is avoided.

The utility model belongs to the technical field of aluminum electrolysis, and particularly relates to a cathode carbon block and steel bar assembling structure which comprises a full-graphite cathode carbon block and a steel bar, at least one steel bar groove is formed in the full-graphite cathode carbon block in a penetrating mode, a leveling layer is arranged on the bottom wall of the steel bar groove, and the steel bar groove is formed in the full-graphite cathode carbon block in a penetrating mode. Two steel bars are symmetrically arranged in the steel bar groove at a fixed interval, and the bottom ends of the steel bars are tightly attached to the leveling layer. A partition layer is arranged in a steel bar groove between the two steel bars, and gaps between the side walls of the steel bars and the steel bar groove are sequentially filled with an inner filling layer and an outer filling layer from inside to outside. According to the structure, the convention is broken, two cathode paste materials are adopted, the cathode carbon block is assembled in a composite mode, compared with a traditional cathode assembly structure, the composite assembly structure can better achieve the effects of restraining horizontal current, reducing the surface conductive resistance of a cathode steel bar and obtaining lower furnace bottom pressure drop during operation of an electrolytic cell, and meanwhile cost is greatly reduced.

The invention provides a high-strength corrosion-resistant steel bar and a production method thereof, the steel bar comprises, by weight, 0.015%-0.03% of C, 0.5%-0.8% of Si, 1.2%-1.6% of Mn, 0.1%-0.3% of Cu, 0.08%-0.11% of Ni, 9.5%-11.5% of Cr, 1.0%-1.5% of Mo, 0.02%-0.05% of Nb, 0.05%-0.08% of V, 0.022%-0.040% of N, 0.05%-0.15% of Sb, 0.01%-0.03% of P, less than or equal to 0.004% of S, less than or equal to 0.003% of O, less than or equal to 0.01% of As and the balance iron and inevitable impurities, and all the elements further meet the conditions that the corrosion resistance coefficient K is 3%-3.7%, and the strength and plasticity coefficient The steel bar disclosed by the invention has relatively high strength-plasticity and extremely high corrosion resistance.

The invention relates to the technical field of material microstructure characterization, and discloses a method for improving ultrafine grain steel bar metallographic detection precision, which comprises the following steps: exciting a nanometer sonoluminescence probe covering the surface of a sample by using a focused sound field, and carrying out global scanning to obtain a reference grain boundary network image; automatically identifying regional interest points including a crystal boundary three-fork point and a signal interruption region from the image; aiming at different types of interest points, adaptively reconstructing a sound field mode or a scanning mode, and carrying out enhancement detection to obtain quantitative diagnosis information of the interest points; and finally, a multi-level interactive report integrating global morphology, key point labeling and local diagnosis is generated. According to the method, the uncertainty of a traditional chemical corrosion method is solved, an intelligent detection normal form from global general survey to local fine survey is realized, the recognition precision and diagnosis capability of defects such as early-stage microcracks are improved, and an objective, accurate and quantitative basis is provided for material performance evaluation.

The invention relates to the field of geotechnical engineering monitoring. The invention provides a vibrating wire type stress meter and application thereof in tunnel surrounding rock stress monitoring. The device comprises a shaft sleeve, a steel bar, a fixing part, a steel string and an excitation sensing module, the end of the steel bar is located in the shaft sleeve, and the fixing part and the steel string are axially arranged in the shaft sleeve. Fixing parts are arranged at the two ends of the steel string, and the ends, away from the steel string, of the fixing parts are connected with the steel bars. The excitation sensing module is arranged above the steel string and installed outside the shaft sleeve. Wherein the middle part of the steel string is a twisted section, and two ends of the steel string are linear sections. According to the invention, the steel string preferentially releases geometric deformation under the action of axial tensile stress through the pre-arranged twisting section in the middle of the steel string, thereby effectively enlarging the amplitude change caused by micro stress, enhancing the response sensitivity of the steel string, breaking through the structural limitation that the stability and the sensitivity of a traditional stress meter are difficult to achieve at the same time, and improving the reliability of the stress meter. The method is suitable for high-reliability and high-precision application scenes in tunnel surrounding rock stress monitoring.

The utility model relates to the technical field of steel bar bending machines, in particular to a bending machine for steel bars, which comprises a bending machine body, two fixing seats, two mounting seats and a bending structure, the left end and the right end of the top of the bending machine body are fixedly connected with the two fixing seats, and the top of the bending machine body is fixedly connected with the two mounting seats. And a bending structure is mounted in the middle of the top of the bending machine body. The steel bar bending machine is provided with the bending structure, the position needing to be bent is placed at the joint of the fixing plate and the rear side of the first clamping plate, the motor is started, the motor drives the threaded rod to rotate, the threaded rod drives the second clamping plate to move forwards, the second clamping plate and the first clamping plate clamp a steel bar, the bending machine body is started, the base drives the fixing plate to rotate, and the steel bar is bent. Through the arrangement of the bending structure, the steel bar bending precision is improved, the engineering quality is guaranteed, meanwhile, it is guaranteed that the steel bars cannot slide in the bending process, and the situation that the quality of finished products is reduced due to sliding of the steel bars in the bending process is prevented.

The invention discloses continuous annealing equipment and an annealing process for round steel bar annealing, and relates to the technical field of metal heat treatment equipment and processes, the continuous annealing equipment comprises an annealing furnace barrel, an annealing box heating pipe and a base, one side face of the annealing furnace barrel is fixedly communicated with an annealing box, and a public self-driving assembly is arranged in the annealing box. The rotary cylinder and the supporting disc are driven through the public self-driving assembly, the round steel bars are kept to rotate synchronously before and after entering the annealing box, continuous circulation and rotary annealing are achieved, compared with traditional stacking annealing, the round steel bars on the inner side of a material pile can also fully absorb heat, and therefore the problems that temperature distribution is uneven, and temperature rise of part of the steel bars is too slow are solved; therefore, the uniform annealing effect of each round steel bar is guaranteed, the internal structure uniformity, the hardness stability and the subsequent machining performance of the product are remarkably improved, and the machining safety and reliability of the material are improved.

The utility model relates to the field of steel bar production heating, in particular to a device with a mica tube easy to disassemble, which comprises an induction coil, the mica tube and a hanging plate, the mica tube is sleeved in the induction coil, the induction coil is arranged on the hanging plate, a vertical plate is matched with the hanging plate, the hanging plate is rotatably arranged on the vertical plate, and the mica tube is arranged on the vertical plate. Due to the fact that the top of the hanging plate and the top of the vertical plate are connected in a rotating mode, the bottom of the hanging plate is connected to the baffle in a lap joint mode, the hanging plate can not reset automatically only by turning over the hanging plate upwards and abutting the top of the hanging plate against the top of the vertical plate, and then a mica tube is drawn out of an induction coil manually. And after the replacement is finished, the hanging plate is manually reset, so that the problem that the induction coil and the mica tube are convenient to overturn is solved.

A method of manufacturing a drill bit includes providing a piece of bar stock having a first end, a second end opposite the first end, and an axis of rotation extending centrally through the bar stock between the first and second ends, cutting the first end of the bar stock to form a first tip angle at an oblique angle measured through the axis of rotation, cutting the first end of the bar stock at a second tip angle measured through the axis of rotation to form first tip surfaces and second tip surfaces. The first tip surfaces have the first tip angle and the second tip surfaces have the second tip angle. The second tip angle is smaller than the first tip angle. Finally forming a flute in the bar stock between the first and second ends and forming a shank at the second end of the bar stock.

The invention relates to the technical field of building monitoring, in particular to a working performance online monitoring method and device for chemical anchor bolts and embedded steel bars. Constructing a chemical glue working condition prediction model according to various acoustic dynamic characteristic data corresponding to the chemical glue within a preset time period before various preset working condition events occur in the working process of the chemical anchor bolt and the embedded steel bar; continuously collecting real-time acoustic characteristic data fed back by the chemical glue in the chemical anchor bolt and the embedded steel bar at a plurality of preset time nodes through a monitoring device; importing a real-time acoustic characteristic dynamic data set into the chemical glue working condition prediction model for prediction; and if the probability value of the preset working condition event of the chemical glue is greater than a preset probability threshold value, generating early warning information. According to the method, the occurrence time of the chemical glue working condition event can be accurately predicted, and the optimal maintenance time period is recommended, so that the accuracy and the maintenance efficiency of working performance monitoring of chemical anchor bolts and embedded steel bars are improved, and the safety and the reliability of a system are remarkably improved.

The invention discloses a material type control method for improving the negative error rate of triple-cutting threaded steel. A clamping and conveying device is additionally arranged between the 2 # shear and the rolling mill, so that a rolled piece horizontally enters the rolling mill, torsion is reduced, and stability is improved; the hole pattern is optimized, it is ensured that a center line segmentation hole is larger than a side line segmentation hole, and the ratio of the center line segmentation hole to the side line segmentation hole is 1: 1.25; optimization work is carried out for a finished product and a sortie roller cooling water pipe before the finished product, an intelligent cooling control system is adopted, and the flow, pressure and temperature of side line and middle line cooling water pipes are monitored in real time and accurately controlled. Wherein the side line cooling water pipe adopts a 1.5-inch water inlet pipe and is provided with a variable frequency water pump, the maximum flow can reach 50m / h, and the system is further provided with a standby power supply, so that cooling control can be maintained for 30 minutes during power failure; in the rolling process, once the weight difference between the center line and the side line is large, the K5 material type is adjusted in time, and it is guaranteed that the center line slitting hole is full.

The invention relates to the technical field of reinforcing steel bar mechanical connection equipment, and discloses a handheld threaded sleeve electric wrench device which comprises a power main body, a clamping mechanism and a fixing mechanism, a mounting space is arranged outside the power main body, and the clamping mechanism is mounted on the outer wall of the power main body. The fixing mechanism is fixedly installed on the outer wall of the clamping mechanism, when the device is started and a half gear rotates, the power body can drive the half gear to rotate, suddenly-increased torque can be offset by the clamping assembly slidably connected to the sliding rod, and when the device is used, a second ejector rod is aligned with the outer wall of a reinforcing steel bar to forcibly extrude and fix the reinforcing steel bar; when the upper end fixing assembly is driven by the power main body to rotate, the threaded pipe rotates at the thread of the reinforcing steel bar, large reaction torque force can be generated, at the moment, due to the fact that the bottom of the equipment body is clamped on the reinforcing steel bar, torque force generated by the upper end rotating assembly can be counteracted on the clamping assembly at the bottom of the equipment, and hand slipping caused by too large torque is avoided.