CN112213019A - Test device for testing torque coefficient of ultra-large-specification high-strength bolt - Google Patents
Test device for testing torque coefficient of ultra-large-specification high-strength bolt Download PDFInfo
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- CN112213019A CN112213019A CN202011113177.4A CN202011113177A CN112213019A CN 112213019 A CN112213019 A CN 112213019A CN 202011113177 A CN202011113177 A CN 202011113177A CN 112213019 A CN112213019 A CN 112213019A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
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Abstract
The invention discloses a test device for testing the torque coefficient of a super-large-specification high-strength bolt, and relates to the technical field of bolt physical performance tests. The test device is composed of the following modules: the device comprises a test platform, a counter-force frame, a power loading device, a loading pull head, a pull head axial adjusting assembly, a counter-force frame axial adjusting assembly and a control system. The reaction frame provides the support reaction for being surveyed the bolt, and the loading pull head is used for calliper to be surveyed the bolt and transmits the support reaction, and power loading device provides torsion power for being surveyed the bolt, and these three modules mutually support with control system, can carry out the automated test of torque coefficient to the bolt fast accurately. The invention can adapt to the test requirements of different specifications of the tested bolt by the axial translation of the counterforce frame and the loading pull head, and has the advantages of wide application range and strong universality.
Description
Technical Field
The invention relates to the technical field of bolt physical performance testing, in particular to a testing device for testing a torque coefficient of a super-large-specification high-strength bolt.
Background
The bolt is one of the most main connecting pieces in the wind turbine generator set and the transmission line, and the main parts of the wind turbine generator set and the transmission line are almost connected by the bolt, so that the safe design and the checking of the bolt become very key components in the structure checking of the wind turbine generator set and the transmission line. Due to the severe service conditions of the wind turbine generator and the transmission line and the influence of severe summer heat and severe cold and extreme temperature difference suffered all the year round, the wind turbine bolts and the transmission line bolts need to bear erosion of high temperature and low temperature, so the wind turbine bolts and the transmission line bolts are required to have high strength, high precision and high grade. Meanwhile, the wind power bolt and the transmission line bolt work under the working condition of severe natural conditions, and are inconvenient to traffic and difficult to install and maintain, so that the wind power bolt and the transmission line bolt are required to have at least 10 years of service life and have enough good mechanical properties. In addition, along with the enlargement of the installed capacity of wind power and the increase of power transmission lines in recent years, the requirements on performance indexes of wind power bolts and power transmission line bolts are higher and higher.
At present, a steel structure bolt torque coefficient testing machine is mainly adopted for testing the mechanical property of the bolt, and the following defects exist in the using process: (1) few detected mechanical items are detected; (2) the space adjustment capability is poor, the device is only suitable for detecting bolts with the specification of M30 or below, the detection of large-specification high-strength bolts is difficult to meet, the application range is small, and the universality is poor; (3) the torque transmission pieces are connected in a pure steel manner, so that the requirements on processing and installation are extremely high, and inaccurate test data is easily caused; (4) the control system is simple and crude, data needs to be manually calculated and recorded, and the error rate is high and the efficiency is low.
Disclosure of Invention
The invention aims to provide a test device for testing the torque coefficient of the ultra-large high-strength bolt aiming at the defects in the prior art. The invention can be used for quickly and accurately testing the physical properties of bolts with various specifications, particularly automatically testing the torque coefficient of high-strength bolts with ultra-large specifications, and has the advantages of stable loading force, accurate result, high efficiency, wide application range, strong universality, intelligent operation and safe use.
The object of the invention can be achieved by the following technical measures:
the invention relates to a test device for testing the torque coefficient of a super-large-specification high-strength bolt, which comprises a test platform (which is a support foundation and a plane reference of the invention), a counter-force frame and a power loading device (the counter-force frame provides support counter-force for the tested bolt and the power loading device provides torsion power for the tested bolt) which are respectively and correspondingly arranged at the front end and the rear end of the upper surface of the test platform, a loading pull head (which can adapt to the test requirements of the tested bolt with different length specifications) which is embedded in an inner cavity of the counter-force frame and can slide back and forth relatively, a pull head axial adjusting component which is arranged at the front end of the loading pull head and drives the loading pull head to translate back and forth, a counter-force frame axial adjusting component which is arranged at one side; the power loading device comprises a loading motor, a loading speed reducer, a transfer flange, a torque sensor, a bearing seat, a coupling and a bolt connector for clamping and embedding a nut, which are sequentially connected from back to front (the loading motor drives the loading speed reducer, the transfer flange, the torque sensor, the bearing seat, the coupling and the bolt connector to rotate together to drive the nut clamped and embedded in an inner cavity of the bolt connector to rotate together, so that the tested bolt is driven by the nut to rotate together to load the tested bolt, and the tested bolt is continuously pre-tightened in the rotating process to generate axial force); the reaction frame comprises a frame base body which is surrounded by a front reaction baffle, a rear reaction baffle, a left reaction baffle, a right reaction baffle and a bottom plate and is provided with a cuboid inner cavity, four travelling wheels which are arranged on the bottom surface of the frame base body, and four guide wheels which are arranged on the left side and the right side of the frame base body (under the driving of an axial adjusting component of the reaction frame, under the matching guiding action of the four guide wheels and corresponding side guide grooves of the rack base, the four travelling wheels are ensured to roll linearly along the axial direction on the test platform, so that the axial translation of the reaction frame; the counter-force frame axial adjusting assembly comprises a bearing seat fixed on the left counter-force baffle, a bearing embedded in the bearing seat, a transmission shaft penetrating in the bearing, a gear and an axial adjusting hand wheel (the axial adjusting hand wheel is rotated by hands, the gear is meshed with a rack to drive four traveling wheels to roll, so that the counter-force frame translates along the axial direction), and the rack matched with the gear is arranged on the top surface of the rack base; the puller axial adjusting assembly consists of a puller motor, a puller reducer, a belt pulley, a transmission belt, an adjusting nut wheel, an adjusting screw rod and an axial force sensor which are sequentially connected (the puller motor is started to work to drive the puller reducer, the belt pulley, the transmission belt and the adjusting nut wheel to rotate, the adjusting nut wheel drives the adjusting screw rod to translate under the action of trapezoidal threads), the adjusting screw rod sequentially penetrates through a puller adjusting hand wheel, the adjusting nut wheel, the axial force sensor and a front counter force baffle from front to back, and the rear end of the adjusting screw rod is connected with the front end of the loading puller through threads (the loading puller is driven to axially slide along a cuboid inner cavity of a counter force frame when the adjusting screw rod translates so as to adapt to the test requirements of tested bolts with different length specifications); the loading pull head is in a square shape, a through groove used for clamping and embedding the tested bolt is formed in the loading pull head along the vertical direction, the cross section of the through groove is in a stepped structure, and the small end of the through groove is opened at the rear end face of the loading pull head (the large end of the tested bolt is pressed down from the through groove and clamped and embedded in the through groove, the loading pull head is driven by the pull head axial adjusting assembly to axially slide to a testing position in contact with the rear counter-force baffle along the cuboid inner cavity of the counter-force frame, and the thread section of the tested bolt penetrates through a bolt penetrating hole of the rear counter-force baffle).
The width of the loading pull head is consistent with that of the cuboid inner cavity of the reaction frame (the loading pull head is embedded in the cuboid inner cavity of the reaction frame and moves back and forth by taking the cuboid inner cavity of the reaction frame as a sliding chute).
In the invention, a bolt through hole (for penetrating a tested bolt) is processed on the rear reaction baffle of the reaction frame.
In the invention, the centers of the axial force sensor and the front counter-force baffle are both provided with a through hole (for through installation of the adjusting screw rod) for installing the adjusting screw rod, the axial force sensor is connected with the front counter-force baffle through a bolt (the axial force of a tested bolt and the supporting counter-force of a counter-force frame are a pair of acting force and counter-acting force, the axial force sensor is connected with the front counter-force baffle into a whole, and the axial force sensor tests the supporting counter-force in real time, namely tests the axial force of the tested bolt).
In the invention, the adjusting screw rod is provided with a trapezoidal external thread; the inner hole of the adjusting nut wheel is provided with a trapezoidal internal thread matched with the trapezoidal external thread of the adjusting screw rod, and the outer surface of the adjusting nut wheel is provided with a groove for embedding a transmission belt (the adjusting nut wheel is also used as a belt pulley).
The rack base is of a half-T-shaped structure, the number of the rack base is two, the left side and the right side of the counter-force frame are symmetrically arranged along the longitudinal direction, the bottom of the counter-force frame is fixed on the top surface of the test platform, and guide grooves for clamping and embedding the guide wheels are formed in the upper portion of the inner side surface of the rack base (four guide wheels arranged on the left side and the right side of the counter-force frame roll along the guide grooves on the corresponding sides, so that the moving direction of the counter-force frame is ensured to.
The test platform comprises a working table, a frame and a ground foot (which is a supporting base of the test platform), wherein the frame is connected with the ground foot in a threaded combination mode (convenient for quick assembly), and the bottom of the ground foot is provided with a locking ring (the height of the ground foot can be adjusted within a small range and is used for leveling the test platform).
According to the invention, the bolt connector is connected with the coupler in a key combination mode (the bolt connector can be quickly positioned with the coupler and can be quickly replaced according to the requirement of a tested bolt), the torque sensor is connected with the adapter flange through the bolt (the torque sensor is convenient to install and rotates together after being connected into a whole to transmit torque and measure torque), and the adapter flange is combined with the loading speed reducer in a key and shaft sleeve mode (quick positioning and transmission rotation).
In the invention, limit stoppers (limiting positions for limiting the forward and backward movement of the reaction frame) are arranged on the top surface of the test platform, positioned on the rack base and arranged at the front end and the rear end of the test platform.
The loading motor, the torque sensor, the pull head motor and the axial force sensor are all connected with a control system in an electric signal mode (after a tested bolt is installed in a through groove of a loading pull head, the control system controls the pull head motor to be started, the loading pull head is driven by a pull head axial adjusting assembly to axially slide to a testing position in contact with a back counter-force baffle plate along a cuboid inner cavity of a counter-force frame, the control system controls the loading motor to be started, the tested bolt is loaded and tested through a power loading device, the torque sensor transmits collected torque information and axial force information to the control system in time, the control system controls the loading motor to continue power output after analyzing, an instruction is sent to stop the test and unload until a preset loading value of the test is reached, and finally the control system analyzes the whole testing process, And provides a test report).
The working principle of the invention is as follows:
the invention consists of the following modules: the device comprises a test platform, a counter-force frame, a power loading device, a loading pull head, a pull head axial adjusting assembly, a counter-force frame axial adjusting assembly and a control system. The reverse force frame provides support reverse force for a tested bolt, the loading pull head is used for clamping the tested bolt and transmitting the support reverse force, the power loading device provides torsional power for the tested bolt, the three modules are matched with the control system, the automatic test of a torque coefficient of the bolt can be quickly and accurately carried out, the control system controls the loading motor to start, the loading motor drives the loading speed reducer, the adapter flange, the torque sensor, the bearing seat, the coupler and the bolt connector to rotate together, the nut clamped and embedded in the inner cavity of the bolt connector is driven to rotate together, the tested bolt which is embedded in the through groove of the loading pull head and rotates together with the nut is driven to load the tested bolt; the tested bolt is continuously pre-tightened in the rotating process, so that axial force is generated, and then the axial force acts on the axial force sensor through the reaction frame and is collected in real time through the axial force sensor; meanwhile, the torque generated in the rotation process is collected in real time through a torque sensor; the torque sensor transmits the acquired torque information and the axial force sensor transmits the acquired axial force information to the control system in time, the control system controls the loading motor to continue power output after analyzing, and sends an instruction to stop the test and unload until a test preset loading value is reached; finally, the control system analyzes the whole testing process and provides a test report, and the automatic testing test of the torque coefficient of the bolt is quickly and accurately completed, so that the method has the advantages of stable loading force, accurate result, high efficiency, wide application range, strong universality, intelligent operation and safe use. Meanwhile, according to different length specifications of the tested bolt, the reaction frame can be translated to a required testing position along the axial direction under the action of the axial adjusting component of the reaction frame, the loading pull head for clamping the tested bolt can be driven by the axial adjusting component of the pull head to axially slide to a testing position contacted with the back reaction baffle along the cuboid inner cavity of the reaction frame, and the thread section of the tested bolt penetrates through the bolt penetrating hole of the back reaction baffle, so that the testing requirements of the tested bolt with different length specifications can be met; in addition, the nut specification used by matching different bolts to be tested is different, and the nut specification can be adjusted by replacing the matched bolt connector; therefore, the torque coefficients of bolts with various specifications can be tested by utilizing the invention, and the invention has the advantages of wide application range and strong universality.
The invention has the beneficial technical effects that:
the invention can quickly and accurately carry out automatic test on the torque coefficients of bolts with various specifications, and has the advantages of stable loading force, accurate result, high efficiency, wide application range, strong universality, intelligent operation and safe use.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a partially enlarged view of a portion a in fig. 2.
The sequence numbers in the figures illustrate: 1. 1-1 parts of a test platform, 1-2 parts of a working table, 1-3 parts of a frame, 1-3 parts of ground feet, 1-3-1 parts of locking rings; 2. the device comprises a counter-force frame, 2-1 parts of a front counter-force baffle, 2-2 parts of a rear counter-force baffle, 2-2-1 parts of a bolt penetrating hole, 2-3 parts of a left counter-force baffle, 2-4 parts of a right counter-force baffle, 2-5 parts of a bottom plate, 2-6 parts of a cuboid inner cavity, 2-7 parts of a travelling wheel, 2-8 parts of a guide wheel; 3. 3-1 parts of a power loading device, 3-2 parts of a loading motor, 3-3 parts of a loading speed reducer, 3-4 parts of a transfer flange, 3-5 parts of a torque sensor, 3-6 parts of a bearing seat, 3-7 parts of a coupler and 3-7 parts of a bolt connector; 4. loading a pull head, 4-1, and forming a through groove; 5. the puller axial adjusting device comprises a puller axial adjusting assembly, 5-1 of a puller motor, 5-2 of a puller reducer, 5-3 of a belt pulley, 5-4 of a transmission belt, 5-5 of an adjusting nut wheel, 5-6 of an adjusting screw rod, 5-7 of an axial force sensor, 5-8 of a puller adjusting hand wheel; 6. the device comprises a counterforce frame axial adjusting assembly 6-1, a bearing seat 6-2, a bearing 6-3, a transmission shaft 6-4, a gear 6-5, an axial adjusting hand wheel 6-6, a rack 6-7, a rack base 6-7-1 and a guide groove; 7. and a limit stop.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1 to 3, the test device for testing the torque coefficient of the ultra-large-specification high-strength bolt of the invention comprises a test platform 1 (which is a support base and a plane reference of the invention), a counter force frame 2 and a power loading device 3 (the counter force frame 2 provides a support counter force for the bolt to be tested, the power loading device 3 provides a torsion power for the bolt to be tested) which are respectively and correspondingly seated on the front end and the rear end of the upper surface of the test platform, a loading pull head 4 (which can adapt to the test requirements of different length specifications of the bolt to be tested) which is embedded in an inner cavity of the counter force frame and can slide back and forth, a pull head axial adjusting component 5 which is installed at the front end of the loading pull head and drives the loading pull head to translate back and forth, a counter force frame axial adjusting component 6 which is installed at one side; the power loading device 3 comprises a loading motor 3-1, a loading speed reducer 3-2, an adapter flange 3-3, a torque sensor 3-4, a bearing seat 3-5, a coupler 3-6 and a bolt connector 3-7 for clamping and embedding a nut, which are sequentially connected from back to front (the loading motor 3-1 drives the loading speed reducer 3-2, the adapter flange 3-3, the torque sensor 3-4, the bearing seat 3-5, the coupler 3-6 and the bolt connector 3-7 to rotate together, so that the nut clamped and embedded in the inner cavity of the bolt connector 3-7 is driven to rotate together, and then the tested bolt is driven to rotate together through the nut to load the tested bolt, namely the tested bolt is continuously pre-tightened in the rotating process, so that an axial force is generated); the counter-force frame 2 comprises a frame base body which is enclosed by a front counter-force baffle plate 2-1, a rear counter-force baffle plate 2-2, a left counter-force baffle plate 2-3, a right counter-force baffle plate 2-4 and a bottom plate 2-5 and is provided with a cuboid inner cavity 2-6, four travelling wheels 2-7 which are arranged on the bottom surface of the frame base body, and four guide wheels 2-8 which are arranged on the left side and the right side of the frame base body (under the driving of a counter-force frame axial adjusting assembly 6, under the matching guiding action of the four guide wheels 2-8 and a side guide groove 6-7-1 corresponding to a rack base 6-7, the four travelling wheels 2-7 are ensured to roll along an axial straight line on the test platform 1; the counter-force frame axial adjusting assembly 6 comprises a bearing seat 6-1 fixed on the left counter-force baffle, a bearing 6-2 embedded in the bearing seat, a transmission shaft 6-3 penetrating in the bearing, a gear 6-4 and an axial adjusting hand wheel 6-5 (the axial adjusting hand wheel 6-5 is rotated by hands, the gear 6-4 is meshed with a rack 6-6 to drive four traveling wheels 2-7 to roll, so that the counter-force frame 2 moves horizontally along the axial direction), and the rack 6-6 matched with the gear is arranged on the top surface of a rack base 6-7; the puller axial adjusting assembly 5 consists of a puller motor 5-1, a puller reducer 5-2, a belt pulley 5-3, a transmission belt 5-4, an adjusting nut wheel 5-5, an adjusting screw rod 5-6 and an axial force sensor 5-7 which are connected in sequence (the puller motor 5-1 is started to work to drive the puller reducer 5-2, the belt pulley 5-3, the transmission belt 5-4 and the adjusting nut wheel 5-5 to rotate, the adjusting nut wheel 5-5 drives the adjusting screw rod 5-6 to translate through the action of trapezoidal threads), the adjusting screw rod 5-6 sequentially penetrates through the puller adjusting hand wheel 5-8, the adjusting nut wheel 5-5, the axial force sensor 5-7 and the front counter force baffle 2-1 from front to back, the back end of the adjusting screw rod 5-6 is connected with the front end of the loading puller 4 through threads (the adjusting screw rod 5-6 translates The loading pull head 4 is driven to axially slide along the cuboid inner cavity 2-6 of the counter-force frame 2 so as to adapt to the test requirements of the tested bolts with different length specifications); the loading pull head 4 is in a square shape, a through groove 4-1 used for clamping and embedding the tested bolt is formed in the loading pull head 4 in the vertical direction, the cross section of the through groove is in a stepped structure, and the small end of the through groove is opened in the rear end face of the loading pull head (the large end of the tested bolt is pressed down from the through groove 4-1 to be clamped and embedded in the through groove 4-1, the loading pull head 4 is driven by the pull head axial adjusting assembly 5 to axially slide to a testing position contacted with the rear counter-force baffle along the cuboid inner cavity 2-6 of the counter-force frame 2, and the thread section of the tested bolt penetrates through the bolt penetrating hole 2-2-1 of the rear counter-force baffle 2-2).
The width of the loading pull head 4 is consistent with the width of the cuboid inner cavity of the reaction frame 2 (the loading pull head 4 is embedded in the cuboid inner cavity of the reaction frame 2 and moves back and forth by taking the cuboid inner cavity of the reaction frame 2 as a sliding chute).
In the invention, a bolt penetrating hole 2-2-1 (for penetrating a tested bolt) is processed on a rear reaction baffle 2-2 of the reaction frame 2.
In the invention, the centers of the axial force sensor 5-7 and the front reaction baffle 2-1 are respectively provided with a through hole for installing an adjusting screw rod (the through hole is used for installing the adjusting screw rod 5-6, the axial force sensor 5-7 is connected with the front reaction baffle 2-1 through a bolt (the axial force of a tested bolt and the supporting reaction force of the reaction frame 2 are a pair of acting force and reaction force, the axial force sensor 5-7 is connected with the front reaction baffle 2-1 into a whole, and the axial force sensor 5-7 tests the supporting reaction force in real time, namely tests the axial force of the tested bolt).
In the invention, trapezoidal external threads are processed on the adjusting screw rods 5-6; trapezoidal internal threads matched with the trapezoidal external threads of the adjusting screw rods 5-6 are processed on the inner holes of the adjusting nut wheels 5-5, and grooves for embedding the transmission belts 5-4 are processed on the outer surfaces of the adjusting nut wheels 5-5 (the adjusting nut wheels 5-5 are also used as belt pulleys).
The rack bases 6-7 are half T-shaped structures, the number of the rack bases is two, the left side and the right side of the counterforce frame 2 are symmetrically arranged along the longitudinal direction, the bottom of the counterforce frame 2 is fixed on the top surface of the test platform 1, and the upper part of the inner side surface of the rack base 6-7 is provided with a guide groove 6-7-1 for clamping and embedding the guide wheel 2-8 (four guide wheels 2-8 arranged on the left side and the right side of the counterforce frame 2 roll along the guide grooves 6-7-1 on the corresponding sides, so that the moving direction of the counterforce frame 2 is ensured to be linearly translated along the.
The test platform 1 is composed of a working table surface 1-1, a rack 1-2 and ground feet 1-3 (which are supporting bases of the test platform), the rack 1-2 and the ground feet 1-3 are connected in a threaded combination mode (convenient for quick assembly), and the bottom of the ground feet 1-3 is provided with locking rings 1-3-1 (the height can be adjusted within a small range and used for leveling the test platform 1).
According to the invention, the bolt connectors 3-7 are connected with the couplers 3-6 in a key combination mode (the bolt connectors 3-7 and the couplers 3-6 can be quickly positioned, and the bolt connectors 3-7 can be quickly replaced according to the requirements of tested bolts), the torque sensor 3-4 is connected with the adapter flange 3-3 through bolts (the installation is convenient, the adapter flange 3-3 and the loading speed reducer 3-2 rotate together after being connected into a whole, the torque is transmitted and measured), and the adapter flange 3-3 and the loading speed reducer 3-2 are combined in a key and shaft sleeve mode (the quick positioning and the transmission rotation).
In the invention, limit stoppers 7 (limiting positions for limiting the forward and backward movement of the reaction frame 2) are arranged on the top surface of the test platform 1, positioned on the rack bases 6-7 and arranged at the front end and the rear end of the test platform.
The loading motor 3-1, the torque sensor 3-4, the pull head motor 5-1 and the axial force sensor 5-7 are all connected with a control system in an electric signal mode (after a tested bolt is installed in a through groove 4-1 of the loading pull head 4, the control system controls the pull head motor 5-1 to be started, the loading pull head 4 is driven by the pull head axial adjusting assembly 5 to axially slide to a testing position in contact with a back counter-force baffle along a cuboid inner cavity 2-6 of a counter-force frame 2, the control system controls the loading motor 3-1 to be started, the tested bolt is loaded and starts to be tested through the power loading device 3, the torque sensor 3-4 transmits collected torque information and axial force information collected by the axial force sensor 5-7 to the control system in time, the control system controls the loading motor 3-1 to continue power output after analysis, sending an instruction to stop the test and unload the test until a test preset loading value is reached; and finally, the control system analyzes the whole test process and gives out a test report).
The specific use cases of the invention are as follows:
firstly, the specification and model of the tested bolt, including the information of the size, the thread pitch, the length of the screw and the like, are confirmed. Then, according to the type of the bolt, replacing the corresponding bolt connector 3-7, and determining the test position of the tested bolt, namely the positions of the translation end points of the loading pull head 4 and the reaction frame 2; then, the axial adjusting hand wheel 6-5 is rotated by hand, the gear 6-4 is meshed with the rack 6-6 to drive the four walking wheels 2-7 to roll, so that the counter force frame 2 is translated to the corresponding testing position along the axial direction. Then, the big head end of the tested bolt is pressed down from the through groove 4-1 and clamped in the through groove 4-1. Then, corresponding control parameters are input into the control system to start the test: the control system controls the pull head motor 5-1 to start, the loading pull head 4 for clamping the tested bolt slides axially along the cuboid inner cavity 2-6 of the counter-force frame 2 to the testing position contacted with the back counter-force baffle under the driving of the pull head axial adjusting component 5, namely the pull head motor 5-1 drives the pull head reducer 5-2, the belt pulley 5-3, the transmission belt 5-4 and the adjusting nut wheel 5-5 to rotate, the adjusting nut wheel 5-5 drives the adjusting screw rod 5-6 to translate through the function of the trapezoidal thread, the adjusting screw rod 5-6 drives the loading pull head 4 to slide axially along the cuboid inner cavity 2-6 of the counter-force frame 2 when translating, until the thread section of the tested bolt penetrates through the bolt penetrating hole 2-2-1 of the back counter-force baffle 2, And the loading pull head 4 is contacted with the back counter-force baffle 2-2; the control system controls the loading motor 3-1 to start, the tested bolt is loaded through the power loading device 3, and the test is started, namely the loading motor 3-1 drives the loading speed reducer 3-2, the adapter flange 3-3, the torque sensor 3-4, the bearing seat 3-5, the coupling 3-6 and the bolt connector 3-7 to rotate together, the nut embedded in the inner cavity of the bolt connector 3-7 is driven to rotate together, and then the tested bolt is driven to rotate together through the nut, the tested bolt is loaded, namely the tested bolt is continuously pre-tightened in the rotating process, so that axial force is generated, the axial force is acted on the axial force sensors 5-7 through the reaction frame 2, the axial force is collected in real time through the axial force sensors 5-7, meanwhile, the torque generated in the rotation process is collected in real time through the torque sensor 3-4; the torque sensor 3-4 transmits the collected torque information and the axial force sensor 5-7 transmits the collected axial force information to the control system in time, the control system controls the loading motor 3-1 to continue power output after analyzing, and sends an instruction to stop the test and unload until a test preset loading value is reached; and finally, the control system analyzes the whole test process and issues a test report, and the test is finished.
Claims (10)
1. The utility model provides a test device of test super large specification high strength bolt torque coefficient which characterized in that: the device comprises a test platform (1), a counter-force frame (2) and a power loading device (3) which are respectively and correspondingly seated at the front end and the rear end of the upper surface of the test platform, a loading pull head (4) which is embedded in an inner cavity of the counter-force frame and can relatively slide back and forth, a pull head axial adjusting assembly (5) which is installed at the front end of the loading pull head and drives the loading pull head to translate back and forth, a counter-force frame axial adjusting assembly (6) which is installed at one side end of the counter-force frame and drives the counter-force frame to translate back and forth; the power loading device (3) comprises a loading motor (3-1), a loading speed reducer (3-2), a transfer flange (3-3), a torque sensor (3-4), a bearing seat (3-5), a coupler (3-6) and a bolt connector (3-7) for clamping and embedding a nut, which are sequentially connected from back to front; the reaction frame (2) comprises a frame base body which is enclosed by a front reaction baffle plate, a rear reaction baffle plate, a left reaction baffle plate, a right reaction baffle plate (2-1, 2-2, 2-3, 2-4) and a bottom plate (2-5) and is provided with a cuboid inner cavity (2-6), four travelling wheels (2-7) arranged on the bottom surface of the frame base body, and four guide wheels (2-8) arranged on the left side and the right side of the frame base body; the counter-force frame axial adjusting assembly (6) comprises a bearing seat (6-1) fixed on the left counter-force baffle, a bearing (6-2) embedded in the bearing seat, a transmission shaft (6-3) penetrating in the bearing, a gear (6-4) and an axial adjusting hand wheel (6-5) which are arranged at the external extending end of the transmission shaft, and a rack (6-6) matched with the gear is arranged on the top surface of the rack base (6-7); the puller axial adjusting assembly (5) consists of a puller motor (5-1), a puller reducer (5-2), a belt pulley (5-3), a transmission belt (5-4), an adjusting nut wheel (5-5), an adjusting screw rod (5-6) and an axial force sensor (5-7) which are connected in sequence, wherein the adjusting screw rod (5-6) sequentially penetrates through a puller adjusting hand wheel (5-8), the adjusting nut wheel (5-5), the axial force sensor (5-7) and a front counter-force baffle (2-1) from front to back, and the rear end of the adjusting screw rod (5-6) is connected with the front end of the loading puller (4) through threads; the loading pull head (4) is in a square shape, a through groove (4-1) used for clamping and embedding the tested bolt is formed in the loading pull head along the vertical direction, the cross section of the through groove is in a stepped structure, and the small end of the through groove is opened at the rear end face of the loading pull head.
2. The test device for testing the torque coefficient of the ultra-large-specification high-strength bolt as claimed in claim 1, is characterized in that: the width of the loading pull head (4) is consistent with that of the rectangular inner cavity of the reaction frame (2).
3. The test device for testing the torque coefficient of the ultra-large-specification high-strength bolt as claimed in claim 1, is characterized in that: and a bolt penetrating hole (2-2-1) is processed on a rear reaction baffle (2-2) of the reaction frame (2).
4. The test device for testing the torque coefficient of the ultra-large-specification high-strength bolt as claimed in claim 1, is characterized in that: the centers of the axial force sensor (5-7) and the front reaction baffle (2-1) are respectively provided with a through hole for installing an adjusting screw rod, and the axial force sensor (5-7) is connected with the front reaction baffle (2-1) through a bolt.
5. The test device for testing the torque coefficient of the ultra-large-specification high-strength bolt as claimed in claim 1, is characterized in that: trapezoidal external threads are processed on the adjusting screw rods (5-6); trapezoidal internal threads matched with the trapezoidal external threads of the adjusting screw rods (5-6) are processed on the inner holes of the adjusting nut wheels (5-5), and grooves for embedding the transmission belts (5-4) are processed on the outer surfaces of the adjusting nut wheels (5-5).
6. The test device for testing the torque coefficient of the ultra-large-specification high-strength bolt as claimed in claim 1, is characterized in that: the rack bases (6-7) are of half T-shaped structures, the number of the rack bases is two, the left side, the right side and the bottom of the counter-force frames (2) are symmetrically arranged along the longitudinal direction and fixed on the top surface of the test platform (1), and guide grooves (6-7-1) used for being clamped and embedded with the guide wheels (2-8) are formed in the upper portions of the inner side surfaces of the rack bases (6-7).
7. The test device for testing the torque coefficient of the ultra-large-specification high-strength bolt as claimed in claim 1, is characterized in that: the test platform (1) is composed of a working table top (1-1), a rack (1-2) and ground feet (1-3), wherein the rack (1-2) is connected with the ground feet (1-3) in a threaded combination mode, and the bottom of the ground feet (1-3) is provided with locking rings (1-3-1).
8. The test device for testing the torque coefficient of the ultra-large-specification high-strength bolt as claimed in claim 1, is characterized in that: the bolt connector (3-7) is connected with the coupler (3-6) in a key combination mode, the torque sensor (3-4) is connected with the adapter flange (3-3) through a bolt, and the adapter flange (3-3) is combined with the loading speed reducer (3-2) in a key and shaft sleeve mode.
9. The test device for testing the torque coefficient of the ultra-large-specification high-strength bolt as claimed in claim 1, is characterized in that: and limit stoppers (7) are arranged on the top surface of the test platform (1), the rack bases (6-7) and the front end and the rear end of the rack bases.
10. The test device for testing the torque coefficient of the ultra-large-specification high-strength bolt as claimed in claim 1, is characterized in that: the loading motor (3-1), the torque sensor (3-4), the pull head motor (5-1) and the axial force sensor (5-7) are all connected with the control system in an electric signal mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011113177.4A CN112213019A (en) | 2020-10-17 | 2020-10-17 | Test device for testing torque coefficient of ultra-large-specification high-strength bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011113177.4A CN112213019A (en) | 2020-10-17 | 2020-10-17 | Test device for testing torque coefficient of ultra-large-specification high-strength bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112213019A true CN112213019A (en) | 2021-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011113177.4A Pending CN112213019A (en) | 2020-10-17 | 2020-10-17 | Test device for testing torque coefficient of ultra-large-specification high-strength bolt |
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| Country | Link |
|---|---|
| CN (1) | CN112213019A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113390545A (en) * | 2021-08-17 | 2021-09-14 | 山东交通职业学院 | Photoelectric torque sensing device based on wireless transmission |
| CN113777027A (en) * | 2021-09-10 | 2021-12-10 | 西北有色金属研究院 | Device and method for evaluating adhesion performance of bolt and nut threads and surface coatings thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095546A (en) * | 2010-12-09 | 2011-06-15 | 浙江华电器材检测研究所 | Shaft force and torque combined testing machine for fastening piece |
| CN103542972A (en) * | 2013-10-30 | 2014-01-29 | 山东中兴电动工具有限公司 | Intelligent dynamic torque tester |
| CN110487469A (en) * | 2019-08-20 | 2019-11-22 | 中冶建筑研究总院有限公司 | A kind of measurement high-strength bolt fastens the device of axle power and torque coefficient |
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2020
- 2020-10-17 CN CN202011113177.4A patent/CN112213019A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095546A (en) * | 2010-12-09 | 2011-06-15 | 浙江华电器材检测研究所 | Shaft force and torque combined testing machine for fastening piece |
| CN103542972A (en) * | 2013-10-30 | 2014-01-29 | 山东中兴电动工具有限公司 | Intelligent dynamic torque tester |
| CN110487469A (en) * | 2019-08-20 | 2019-11-22 | 中冶建筑研究总院有限公司 | A kind of measurement high-strength bolt fastens the device of axle power and torque coefficient |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113390545A (en) * | 2021-08-17 | 2021-09-14 | 山东交通职业学院 | Photoelectric torque sensing device based on wireless transmission |
| CN113390545B (en) * | 2021-08-17 | 2021-12-10 | 上海芬宜实业有限公司 | Photoelectric torque sensing device based on wireless transmission |
| CN113777027A (en) * | 2021-09-10 | 2021-12-10 | 西北有色金属研究院 | Device and method for evaluating adhesion performance of bolt and nut threads and surface coatings thereof |
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Application publication date: 20210112 |