1281 results about "Torque wrench" patented technology

A pipe handler that can include a wrench assembly with a backup tong and a torque wrench, and a rotary actuator coupled to the torque wrench, wherein rotation of the rotary actuator about a second axis rotates the torque wrench about a first axis. An iron roughneck that can include a torque wrench configured to rotate about a first axis, and a rotary actuator coupled to the torque wrench, the rotary actuator having a second axis about which the rotary actuator rotates, where the second axis and the first axis are substantially parallel with each other and spaced apart from each other, and where rotation of the rotary actuator about the second axis rotates the torque wrench about the first axis.

The invention relates to a buoyancy tank wharf real-time assembly quality control method, and belongs to the technical field of port engineering automatic construction. According to the method, aiming at the problems of large geometric positioning deviation, uneven contact surface stress and difficulty in real-time control of attitude instability in buoyancy tank assembly, laser range finders are mounted at four corners of a buoyancy tank through a geometric positioning layer to monitor horizontal deviation, and pressure sensors are arranged on a butt joint surface through a mechanical sensing layer to generate a pre-tightening force curve; the attitude monitoring layer adopts a bottom inclination angle sensor to detect inclination; according to the horizontal deviation, the curve similarity deviation and the inclination angle deviation, the real-time management and control platform triggers a hydraulic adjusting mechanism, a torque wrench and a balance weight drive to conduct adjustment; meanwhile, data are stored through a buoyancy tank number, a timestamp and a sensor type three-dimensional index, and a rechecking instruction is generated based on the difference between the current adjusting quantity and the first three mean values. According to the invention, real-time control and dynamic adjustment of the assembly process are realized, and the modular assembly precision and safety of the floating wharf are improved.

The invention relates to an intelligent torque feedback and self-adaptive adjustment method and device and computer equipment, and the method comprises the steps: monitoring an actual torque value applied by an electric torque wrench in real time through a torque sensor; a preset target torque value is obtained, and the motor output torque of the electric torque wrench is automatically adjusted according to the target torque value and the actual torque value until the actual torque value reaches the target torque value; when the actual torque value reaches the target torque value, the electric torque wrench is controlled to be shut down, the current working condition is reported, and the working condition comprises the target torque value, the time for reaching the target torque, the number of times of completion and the number of times of failure, so that in the actual large-bolt fastening operation, the large-bolt fastening efficiency is improved. Through intelligent control, accurate torque adjustment, operation data recording and remote management, the purpose of improving operation efficiency and safety is achieved.

The invention relates to a hydrostatic guideway and a manufacturing method thereof. The hydrostatic guideway mainly comprises four structural components, namely a supporting component, a linear shaft moving component, an oil way channel component and a connecting component. The manufacturing method of the static pressure guide rail comprises the steps that firstly, plastic pasting is conducted on the installation positions of the static pressure plates on the bottom face of the stand column, then the plastic pasting faces are scraped manually to improve contact precision and geometric precision, then the upper end faces and the lower end faces of all the static pressure plates are ground to be consistent in thickness on a grinding machine, and the height difference is within 0.002 mm; finally, the static pressure plate is connected to the stand column bottom through a torque wrench through screws, and manufacturing of the static pressure guide rail pair is completed. The invention has the following advantages: 1) the process of firstly pasting plastic and then scraping and grinding is relatively simple, and the machinability is strong; 2) the modular manufacturing cost of the components is low, and subsequent assembly debugging, maintenance and replacement are facilitated; and 3) the oil sealing edge and the guide rail surface of the lathe bed are grinding surfaces, the oil film thickness is uniform after floating, the hydrodynamic performance is close to the theoretical performance, and the problems of leakage of the oil sealing edge, non-uniform floating and the like in the traditional method are solved.

A test bench for checking correct operation of torque wrenches to be tested may include: at least one calibration station for a torque wrench, wherein the at least one calibration station includes a transducer, including a rotating head, configured to couple with a tool head of the torque wrench so that the tool head and the rotating head rotate in unison; an electronic processing unit configured to control the transducer according to predetermined tightening programs consistent with the torque wrenches to be tested; and a locking mechanism of the torque wrench, configured to lock a handle of the torque wrench when the tool head is coupled to the rotating head, wherein the locking mechanism includes an elongated guide, on which a slide moves longitudinally with respect to the handle of the torque wrench, wherein the elongated guide includes reaction bars that limit movement by the handle of the torque wrench.

A torque wrench calibration automation system comprises: a body part; a handle rotation drive part; and a handle push drive part, wherein the body part includes a calibrator that collects data, transmits the data, and receives control signals, a head fixing part that fixes the position of a head part of a torque wrench, a body part base with a flat top surface, and a handle base that moves linearly from the top of the body part base; the handle rotation drive part includes a handle rotation motor installed on the handle base of the body part, and a handle rotation module connected to the front end of the handle rotation motor and rotating the handle part of the torque wrench; and the handle rotation module includes an air pressure supply part that provides air pressure required when mounting or dismounting the handle part of the torque wrench.

A hydraulic torque wrench comprises a ratchet link, a power head, and a signal carrying connector for connection to a controller. The ratchet link includes a housing and a drive plate mounted for rotation about an axis within the housing, the drive plate mounting one part of a first part of a ratchet drive. A socket is mounted for rotation within the housing, the socket providing a second part of the ratchet drive. During rotation of the drive plate in one direction the first and second part of the ratchet drive engage each other to cause rotation of the socket with the drive plate and during rotation of the drive plate in a second direction one of the first and second parts of the ratchet drive rides over the other such that the socket remains stationary while the drive plate rotates. The power head includes a piston and cylinder and hydraulic connections adapted for connection to a source of pressurised hydraulic fluid. The torque wrench mounts a proximity sensor connected to the signal carrying connector and configured to detect maximum extension of the piston. When maximum extension of the piston is detected the proximity sensor emits an electrical signal.

The invention discloses an intelligent control method for a cutter changing robot of a shield tunneling machine, belongs to the technical field of automatic control, and aims to solve the problems of low hob changing efficiency, inaccurate decision, large positioning error and the like of the shield tunneling machine under a complex stratum. Hob state parameters are collected through multiple sensors, a three-level decision threshold value is constructed, dynamic adjustment is conducted through fuzzy logic, and intelligent hierarchical control over abrasion pre-judgment, early warning and emergency response is achieved. A multi-dimensional weighting model is adopted to calculate the priority of the abraded hob, a cutterhead path is optimized in combination with a dual-objective function, and an efficient execution sequence is generated. In the positioning link, through reverse path planning, PID compensation inertial slippage and cooperation of multispectral imaging and feature matching technologies, hob mark points are accurately extracted, pose deviation is corrected, and it is ensured that the hob mark points enter a robot working space. A double-station conversion table is integrated, synchronous exchange of a new cutter and an old cutter is achieved through hydraulic and servo control, force-position hybrid control is adopted for an end effector, and the disassembly and assembly stability is improved by combining with a torque wrench for staged operation.

The utility model relates to a tensioning device for a building block type screw. The tensioning device comprises a stretching piece, a pressing piece, a telescopic piece and a driving piece. The stretching piece is used for being connected with a locking piece of the building block type screw. The pressing piece is used for being connected with a thread element of the building block type screw. One end of the telescopic piece is connected with the stretching piece, and the other end of the telescopic piece is connected with the pressing piece; the driving part is connected with the telescopic part and used for driving the telescopic part to do telescopic motion. Compared with the prior art, the tensioning piece and the pressing piece only transmit axial force to the shaft core and the thread element, so that the transmission efficiency of the tensioning force is high, and compared with a radial screwing mode of a traditional torque wrench, radial load is not borne between the shaft core and the thread element, and the torque wrench is simple in structure and convenient to use. The problem that the friction coefficient is increased due to torsional deformation of the thread element and the shaft core spline is solved.

The invention relates to the technical field of electric torque wrench calibration, in particular to an electric torque wrench calibration device which comprises a calibration table and a rotating seat rotationally arranged above the calibration table, a calibration station is arranged on the rotating seat, and a calibration mechanism is arranged in an inner cavity of the calibration table. According to the electric torque wrench calibration device, the efficiency is improved through multi-station cooperation, four symmetrical calibration stations are arranged through a rotating seat, rotation is driven by combining a stepping motor, multi-station parallel operation is achieved, the calibration efficiency is improved by 3-4 times, and accurate positioning and automatic feeding are achieved; millimeter-level positioning precision is achieved, manual intervention is reduced, intelligent angle recognition and adjustment are achieved, a CCD camera module is combined with a PLC to recognize the angle of the sleeve in real time, a hydraulic damper rotating mechanism is driven to be automatically matched, and the calibration success rate is increased to 99% or above.

The invention belongs to the technical field of maintenance of upper reactor internals of a reactor, and particularly relates to a process and a device for maintaining a bolt locking cap of a control rod guide cylinder of an upper reactor internals. Comprising a bolt torque reinspection tool and a locking cap automatic bending tool. The bolt torque reinspection tool is matched with a torque wrench to realize reinspection of bolt torque; the automatic bending tool for the locking cap is used for controlling the bulging claw to correspond to a groove of a locking bolt head and driving the bulging claw to press downwards to bend the locking cap, so that looseness prevention of the bolt is achieved. The device has the beneficial effects that a bolt torque reinspection tool and an automatic locking cap bending tool are conveyed to a working area through a ring crane, and the field environment is not changed; the bolt torque reinspection tool and the locking cap automatic bending tool are both of a long-rod-shaped structure as a whole, an operator can perform remote operation on an operation platform, and whether the torque of the guide cylinder bolt meets the locking requirement or not can be inspected in cooperation with a torque spanner.

The invention provides a torque wrench. The torque wrench comprises a wrench operation main body; the torsion generating part is arranged outside the wrench operation main body in a sleeving manner, so that the pressing force is converted into rotating torsion; the wrench operation main body is sleeved with the torsion transmission part, one end of the torsion transmission part is connected with the torsion generation part in a matched mode, and the other end of the torsion transmission part is connected with the wrench operation main body in a matched mode; and the torque transmission part transmits the rotating torque generated by the torque generation part to the wrench operation main body so as to realize the rotation of the wrench operation main body. The pressing force is converted into the rotating torque to drive the torque transmission part to rotate, torque transmission is achieved, and therefore the wrench operation body is driven to rotate, and then the ultrasonic knife and the transducer are rapidly installed.

The invention relates to the technical field of pressing rivet nut testing, in particular to a positioning structure for pressing rivet nut torsion testing, which comprises a pressing rivet nut testing, positioning and mounting disc, and a pressing rivet nut workpiece mounting table is fixedly mounted in the middle of the pressing rivet nut testing, positioning and mounting disc; the pressing rivet nut torque testing device has the beneficial effects that the pressing rivet nut workpiece mounting table is matched with the workpiece positioning structure, so that basic positioning and fixing of a pressing rivet nut torque testing workpiece can be achieved, the positioned and fixed workpiece is locked through the locking anti-falling structure, and a torque wrench is fixed through the torque wrench positioning structure; meanwhile, the locking anti-falling structure is in linkage with the locking anti-falling structure through an arc-shaped gear ring, a locking gear and a rack, when the pressing rivet nut is wrenched for torque testing and deflects, the triangular locking frame is reversely pushed for re-locking, position correction is conducted on deflection caused by too large torsional force, and the situation that a workpiece continues to loosen, and the nut torque testing result is affected is avoided.

The invention relates to a screw assembly torque testing device which comprises a testing base, a nut adapter is detachably arranged on the testing base, a pre-tightening groove is formed in the side wall, away from the installation side of the nut adapter, of the testing base, the depth of the pre-tightening groove is not larger than 0.2 times of the height of the head of a screw, and the inner bottom wall of the pre-tightening groove is a pre-tightening plane; the tightening torque measuring mechanism comprises a torque wrench and a quick tightening wrench which can move in the direction close to or away from the pre-tightening groove, the front and back positions of the torque wrench and the quick tightening wrench can be interchanged, and the two wrenches can rotate around the axis of the screw and are used for tightening the screw; the positioning auxiliary testing mechanism is matched with the screwing torque testing mechanism to realize dual data detection of the screw torque; and the control panel is electrically connected with the screwing torque measuring mechanism and the positioning auxiliary testing mechanism to realize device driving and measured value display. According to the invention, the test precision and efficiency of the static assembly torque of threaded fasteners such as screws are improved, and the test requirements of most of threaded fasteners are met.

The invention discloses a bolt tightening rotation angle reachability prediction system for a tripping type torque wrench, and relates to the technical field of industrial intelligence. The method is used for solving the problem that the rotation angle reachability is difficult to predict under nonlinear friction interference. The method comprises the steps that firstly, a system obtains a dynamic tightening sequence and a static working condition context through a wrench communication interface, a composite heterogeneous input tensor is constructed through an entity embedding and sliding window algorithm, and multi-source data fusion is achieved; then, local spatial features and time-dependent features are extracted in parallel through a convolutional neural network and a long-short-term memory network, a high-dimensional spatial-temporal feature vector sequence is generated through cascade fusion, and a hidden layer friction state is captured; then, based on a self-attention mechanism, calculating an attention weight matrix and generating a context vector, calculating an estimated endpoint moment and a confidence probability value, and quantitatively evaluating rotation angle accessibility; and finally, mapping the confidence coefficient into discrete state codes by using a probability decoding function, packaging and outputting the discrete state codes, and constructing a closed-loop system from data perception to state pre-judgment.

The utility model discloses a torque wrench which comprises a connecting rod, a torque display ring is fixedly installed at the lower end of the connecting rod, a handle rod is fixedly installed at the lower end of the torque display ring, a torque adjusting ring is movably installed at the lower end of the handle rod, and a fixing ring is welded to the lower end of the torque adjusting ring. A mounting head is welded to the upper end of the connecting rod, a ratchet wheel head is movably mounted at the rear end of the mounting head, a switching shifting piece is movably mounted at the front end of the mounting head, and limiting nails are mounted at the positions, located on the two sides of the switching shifting piece, of the front end of the mounting head in a threaded mode. According to the torque wrench, the function of temporary placement is achieved, the wrench can be used for operation on a railway contact network more conveniently, falling during temporary placement is prevented, the torque wrench is hung on the railway contact network through the connecting hook, the torque wrench is directly used as a safety buckle, and the use safety of the torque wrench is improved.

The invention discloses a nut locking torque measuring device and method, and the device comprises a bottom plate, a torque measuring assembly, a clamping assembly, a one-way locking assembly and a driving assembly, the top of the torque measuring assembly is provided with a measuring end, the measuring end is detachably connected with a mounting part, and the clamping assembly comprises a mounting seat. Two clamping parts which are oppositely arranged are movably connected to the mounting seat, clamping surfaces are arranged on the two clamping parts, limiting blocks are arranged on the two clamping surfaces, the two sets of one-way locking assemblies are arranged on the mounting seat and used for locking the two clamping parts respectively, and the driving assembly is movably connected with the mounting seat. A first elastic piece is arranged between the driving assembly and the mounting base, and the driving assembly is used for driving the mounting base to move in the vertical direction and driving the mounting base to rotate. The torque wrench aims at solving the technical problems that a torque wrench is narrow in application range, high in cost and inconvenient to align and operate.

The utility model belongs to the technical field of nut wrenches, and particularly relates to a precise locking nut wrench which comprises a wrench body, two bearings are fixedly connected to the inner wall of the wrench body, and the same main shaft is welded to the inner sides of inner rings of the two bearings. The wrench body serves as a main body of the whole tool and is flexibly and rotationally connected with the main shaft through the bearing, the limiting sleeve is installed on the main shaft and used for limiting the stroke of the main shaft, the square hole is formed in one end of the wrench body, and the shape and the size of the square hole are designed to be matched with those of a torsion bar on a torsion plate. A user can directly sleeve the torsion bar on the torsion plate into the square hole to realize torque transmission and control of the wrench body, the locking part is a key part of the wrench body and is in direct contact with a locked nut, and when a torsion wrench applies torque, the torque is transmitted to the torsion bar through the torsion plate and then is further transmitted to the locking part of the main shaft, so that the nut is locked. Therefore, locking of the nut is achieved, and efficient and accurate locking operation is achieved.

The invention relates to the technical field of petroleum drilling, in particular to an intelligent dismounting and mounting device, system and method for a blowout preventer bolt, and aims to solve the problems that a large-size bolt is difficult to dismount and the working efficiency is low. The invention provides an intelligent dismounting and mounting device for a blowout preventer bolt. The intelligent dismounting and mounting device comprises an industrial robot, a flexible connecting mechanism, a floating mechanism, a torque wrench and a sleeve. The sleeve is installed on the torque wrench, the torque wrench is installed on the floating mechanism, the floating mechanism is installed on the flexible connecting mechanism, and the flexible connecting mechanism is installed on the industrial robot. The flexible connecting mechanism is used for driving the floating mechanism to swing around the axis of the floating mechanism and move along the axis of the floating mechanism. The floating mechanism is matched with the flexible connecting mechanism, so that the problem that the axes of the torque wrench, the sleeve and the bolt are not coincident and not concentric is solved, the sleeve and the bolt can be quickly positioned, the efficiency of disassembling and assembling the bolt is improved, and the disassembling difficulty of the bolt is reduced.

A hydraulic torque wrench system including a low profile power head connectable to a ratchet link is disclosed. The power head includes a housing having opposed side walls with a width therebetween. A first connection unit located on the front wall of the housing includes a front projection having a stem and opposed arms. The stem has opposed side walls that extend from the front wall of the housing to a radiused free end. The opposed arms extend laterally from the opposed side walls. The first connection unit is coupled a connection slot in the ratchet link. A second connection unit located on the bottom wall of the housing includes a bottom projection with a bore. The second connection unit is coupled to a bore in the ratchet link by a pin. The opposed arms span a distance that is less than or equal to the width of the housing.

A method of calibrating an electronic torque wrench (100) engaged with a torque tester (302) according to a specified calibration procedure that includes increasing an applied torque to a target torque value and a threshold time rate of change of the applied torque is provided. The method includes detecting an applied torque generated by a rotational force applied by an operator to the electronic torque wrench (100). The method includes, when an applied torque is detected, determining a torque value of the applied torque and a rate of change over time of the applied torque. The torque value and the time rate of change are compared with a target torque value and a threshold time rate of change, respectively. And output a notification to guide an operator with respect to a rotational force applied by the operator, and thereby with respect to an applied torque generated from the rotational force.

A torque wrench may include a head having a driving member configured to be operably coupled to a socket, a handle, a lever arm operably coupled to the head and the handle at respective opposing ends thereof, a torque adjuster configured to enable a torque setting of the torque wrench to be adjusted and an adjustment channel which may be disposed between the handle and the torque adjuster. A locking member may be disposed within the adjustment channel to block the torque adjuster from changing the torque setting.

The invention relates to a comprehensive test bed and method suitable for a hydraulic maintenance tool of a power station. The comprehensive test bed comprises a hydraulic bolt tensioner test bed and a hydraulic torque wrench test bed which are electrically connected with a central data processing table, the hydraulic bolt tensioner test bench comprises a tensioner test working panel, the upper side and the lower side of the tensioner test working panel are respectively provided with a magnetic attraction support and are symmetrical to each other, and two contact type displacement sensors are respectively connected with the two magnetic attraction supports. For performance test and detection of hydraulic maintenance tools and instruments commonly used in hydropower stations, the device can specifically meet the requirements of performance detection of hydraulic torque wrenches and hydraulic bolt tensioners used in maintenance operation. Key technical problems of multi-specification adaptability of hydraulic tools, large torque value and pre-tightening force range, real-time corresponding detection of pressure and torque value or pre-tightening force and the like are mainly solved, and the comprehensive test device is suitable for comprehensive test of hydraulic maintenance tools with multi-specification and large performance coverage range in a power station.

The utility model discloses a multifunctional maintenance manipulator for a blowout preventer, relates to the technical field of maintenance of the blowout preventer, and aims to solve the problems of high labor intensity and low working efficiency when bolts are detached during maintenance of the blowout preventer. A torque wrench is installed at the output end of the power-assisted manipulator and used for disassembling a bolt on the blowout preventer body, and the output end of the torque wrench is detachably connected with a disassembling and assembling sleeve.

The invention provides a multifunctional guide column grabbing tool. The multifunctional guide column grabbing tool comprises a hanging ring, an operation handle, a hook claw operation handle, a rod body, an inner sleeve, a mandrel and hook claws. The hanging ring is installed on the top of the rod body. The operating handle is located at the upper end of the rod body and used for an operator to adjust the posture of the multifunctional guide column grabbing tool through the operating handle. The lower end positioning pin of the rod body is inserted into the upper end round hole of the long guide column rod body. The inner sleeve is located in the rod body and configured to slide up and down in the rod body. The lower end of the inner sleeve is provided with a boss structure, and the upper end of the inner sleeve is provided with a claw operating handle. The mandrel is located in the inner sleeve, the upper end of the mandrel is matched with the manual torque wrench, and the lower end of the mandrel is matched with the long guide column locking rod. By integrating multiple functions of grabbing, transferring and screwing of the quick-release guide column, the technical problems that the operation time of operators is too long and the irradiation dose of field operators is increased due to the fact that the operation of the guide column is complex in the prior art are solved.

The utility model discloses a pipeline maintenance fixed torque wrench which comprises a rotating handle, a movable block is movably embedded in the rotating handle, a groove body is formed in the center of the interior of the rotating handle, a plurality of clamping grooves are evenly formed in the outer side of the movable block, and a rotating mechanism facilitating nut rotating is arranged in the center of the movable block. A limiting plate is fixedly arranged on the outer side of the rotating handle, and a first sliding block is arranged in the rotating handle in a sliding mode. The rotating mechanism is connected to the outer side of the nut in a sleeving mode, then the rotating handle is rotated, the rotating mechanism drives the nut to rotate, fastening work is conducted in this way, when the nut is fastened to a proper torque, the force needed for rotating the nut is large at the moment, a clamping groove extrudes a fixing ball to move downwards during rotation, and a first sliding block is driven to move downwards to extrude a spring; and the nut cannot be rotated until the fixing ball is separated from the interior of the original clamping groove and moves into the adjacent clamping groove, so that the fixing torque of the nut is fixed, and excessive fixation is prevented.

The invention relates to the technical field of electric tools for mines, in particular to a mining explosion-proof handheld impact torque wrench which comprises an outer shell and an explosion-proof inner shell, a direct-current brushless motor is mounted on the upper portion of the explosion-proof inner shell, and the front end of a motor shaft penetrates out of the explosion-proof inner shell to be sequentially connected with a speed reducing mechanism and an impact mechanism. The impact mechanism comprises a power spindle, a striking block, a T-shaped shaft and an impact spring, the rear end of the power spindle is connected with the speed reducing mechanism, the T-shaped shaft is fixed to the front end of the power spindle, the front end of the T-shaped shaft extends out of the shell, the striking block sleeves the power spindle, grooves are formed in the connecting surfaces of the striking block and the power spindle, balls are movably embedded in the grooves, and the two ends of the impact spring abut against the striking block and the power spindle; an 8-shaped movable groove is formed in the front end face of the striking block, the T-shaped shaft comprises an output shaft and a striking anvil block, and the striking anvil block can rotate in the movable groove. The mining explosion-proof handheld impact type torque wrench can effectively solve the technical problems that an existing electric impact wrench does not have the explosion-proof performance and is small in torque.

The utility model relates to an ultrasonic instrument handle, an ultrasonic cutting instrument and an ultrasonic operation cutting system. The ultrasonic instrument handle comprises a rotary knob, an outer pipe connecting piece and a damping piece. An ultrasonic cutting instrument includes a transducer, an operating handle, a shaft assembly, and a torque wrench. According to the ultrasonic cutting instrument, when the knob is operated, under the action of the first torque and the second torque, the knob applies the rated torque sufficient for connecting the waveguide to the transducer to the outer tube connecting piece, and meanwhile, due to the existence of the damping piece, when an operator uses the instrument to conduct surgical operation after the handle and the transducer are well connected, the operation efficiency is greatly improved. When the rotary knob is rotated to adjust the shaft assembly, due to the fact that torsion not larger than the first torque exists between the rotary knob and the outer pipe connecting piece, the problem of idle stroke is avoided when the rotary knob is operated to drive the shaft assembly to rotate, and rotation of the rotary knob and the shaft assembly has synchronism.

The invention relates to the technical field of beer detection, in particular to a detection device for a beer bottle crown cap. The detection device for the beer bottle crown cap specifically comprises a sleeve mechanism and a torque wrench, the sleeve mechanism comprises a first groove and a second groove, the crown cap on the beer bottle is sleeved with the first groove, and the torque wrench is inserted into the second groove. A to-be-measured beer bottle is placed on a stable table top, a crown cap of the to-be-measured beer bottle is connected with a torque wrench through a sleeve mechanism, then the to-be-measured beer bottle is held by one hand, the torque wrench is uniformly and forcibly pushed towards one direction by the other hand until the crown cap is loosened and displaces, and the reading of the torque wrench is recorded. The tightness is the tightness of the crown cap and the bottle opening of the beer bottle. The method has the advantage of directly reflecting the tightness of the crown cap.

The invention discloses a test method for a strain clamp, and the method comprises the steps: carrying out the crimping and drainage plate assembly of the strain clamp, and fastening a bolt on a drainage plate to a preset initial torque value through a digital display torque wrench; measuring the contact resistance of a drainage plate of the strain clamp; arranging a T-shaped thermocouple at a monitoring point position of the strain clamp; sequentially applying currents with different percent calculated current-carrying capacities to the strain clamp through a large current generator, and recording transient temperature rise data corresponding to each monitoring point position; and measuring the contact resistance and transient temperature rise data under different bolt torques under the current of each percentage calculation current-carrying capacity. According to the invention, the actual working state of the strain clamp under different drainage plate assembly conditions can be simulated, the bolt torque of the strain clamp is taken as an independent variable, the contact resistance between the drainage plates under different torques is measured, and the overall temperature distribution of the clamp is measured through the temperature measurement probe, so that the test accuracy is improved. Therefore, real-time measurement of three kinds of data of bolt torque, contact resistance and wire clamp temperature rise is realized.