CN116007920B - Research method for fatigue test of angle-adjustable fastener - Google Patents
Research method for fatigue test of angle-adjustable fastener Download PDFInfo
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Abstract
The invention discloses a research method for fatigue test of an angle-adjustable fastener, which comprises the following steps: s1, adjusting an angle-adjustable fastener fatigue test platform to enable normal operation; s2, calculating the lifting or lowering adjustment quantity of the working platform; s3, acquiring known parameters, wherein the known parameters comprise: the transverse position a of the loading point of the actuator; the initial loading height h of the actuator; load height h of actuator after lifting platform 0 The method comprises the steps of carrying out a first treatment on the surface of the An initial angle alpha of the actuator; calculating the rise or fall of the working platform by |h-h according to the acquired known parameters 0 Angle β of the rear actuator, the amount of elongation or contraction L of the actuator; s4, adjusting the actuator to a designated position according to the calculated value and then performing a fastener fatigue test; and S5, closing the equipment after the fatigue test of the fastener is finished. The research method is suitable for carrying out fatigue tests of most types of fasteners.
Description
Technical Field
The invention relates to the technical field of railway engineering, in particular to a research method for fatigue test of an angle-adjustable fastener.
Background
The fastener system can better relieve the mechanical impact force and vibration to the steel rail in the railway operation process by using the energy stored in the elastic deformation process of the elastic strip, has an important effect on maintaining the stability of the track structure, and is a key component for forming a railway track system.
In the service process, the elastic strip is subjected to more periodical bending and torsion alternating pressure and the like, so that attention is necessarily paid to the elastic strip performance under the action of long-term load acting force. Along with the gradual expansion of research on the fatigue performance of the elastic strip of the high-speed railway fastener system in recent years, a fatigue experiment on the fastener system is developed, a key stage parameter model for the fatigue process identification is provided, and the method has important significance for judging the long-term service performance of the fastener.
The research method of the fatigue test of the fastener system in China mainly loads the stressing bracket, so that the steel rail is subjected to unidirectional loading to conduct the research of the fatigue test.
Because the stressing bracket of one type can only be suitable for one type of fastener, a research method capable of meeting the requirement of fatigue test of most types of fasteners is required to be researched, so that the technical reserve blank in the field of rail fastener fatigue test in China is made up.
Disclosure of Invention
The invention aims to provide a research method for fatigue test of an angle-adjustable fastener, which is suitable for fatigue test of most types of fasteners.
In order to achieve the above purpose, the invention provides a research method of an angle-adjustable fastener fatigue test, which is based on an angle-adjustable fastener fatigue test platform, wherein the angle-adjustable fastener fatigue test platform comprises two actuators which are symmetrically arranged, can be slidingly adjusted along an arc-shaped beam, extend towards the center direction of the arc-shaped beam and act on two sides of a rail head of a steel rail, and also comprises a lifting tool platform which is arranged below the arc-shaped beam and used for fixing the steel rail;
the research method comprises the following steps:
s1, adjusting an angle-adjustable fastener fatigue test platform to enable normal operation;
s2, calculating the lifting or lowering adjustment quantity of the tooling platform;
s3, acquiring known parameters, wherein the known parameters comprise:
the transverse position a of the loading point of the actuator;
initial loading height h of actuator 0 ；
The loading height h of the actuator after the platform is lifted;
an initial angle alpha of the actuator;
calculating the rise or fall of the tool platform by |h-h according to the acquired known parameters 0 Angle β of the rear actuator, the amount of elongation or contraction L of the actuator;
s4, adjusting the actuator to a designated position according to the calculated value and then performing a fastener fatigue test;
and S5, closing the equipment after the fatigue test of the fastener is finished.
Preferably, the tooling platform is raised or lowered by |h-h 0 The calculation method of the angle beta of the actuator behind the I is as follows: a×tanα=h 0 ，a×tanβ＝h，
The two formulas are subtracted to obtain the following formula: a×tan β -a×tan α=h-h 0 ，
I.e.
Preferably, the tooling platform is raised orReduce |h-h 0 The calculation method of the elongation or contraction L of the actuator behind the I is as follows:
preferably, an arc roller way is arranged on the upper surface of the arc beam, and travelling wheels corresponding to the arc roller way are arranged on structural members on the actuator, which are used for clamping the arc beam;
the fixed chain is arranged at the outer side of the arc roller way on the arc beam, the motor is arranged on the structural member, and the sprocket capable of being positioned on the fixed chain and matched with rolling is arranged on the shaft body of the motor.
Preferably, each actuator is symmetrically provided with two structural members along two sides parallel to the axial direction of the arc-shaped beam, and the arc-shaped beam and the structural members are correspondingly provided with two structural members.
Preferably, a floor is arranged below the tooling platform, and the tooling platform is arranged on the floor and can adjust transverse displacement along an axial direction parallel to the arc beam.
Preferably, a horizontal movement driving mechanism capable of driving the tooling platform to move is arranged on the floor, a horizontal sliding rail is further arranged on the floor, and a guide rail block matched with the horizontal sliding rail is arranged on the bottom surface of the tooling platform.
Preferably, horizontal locking mechanisms for clamping or loosening the tooling platform are arranged on the floor and located on two sides of the tooling platform.
Preferably, a lifting mechanism is arranged below the floor;
the floor is characterized in that the two sides of the floor are provided with reverse sliding modules, the side surface of the reaction frame facing the floor is a vertical surface, and the vertical surface is provided with lifting sliding rails corresponding to the reverse sliding modules.
Preferably, the lifting mechanism is supported and arranged on the T-shaped bottom beam, the counterforce frame is arranged at a position extending transversely to the T-shaped bottom beam, and the lifting mechanism is arranged at a position extending longitudinally to the T-shaped bottom beam.
According to the technical scheme, the research method based on the fatigue test platform of the angle-adjustable fastener is suitable for fatigue tests of most types of fasteners.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
FIG. 1 is a flow chart of a method of investigation in the present invention;
FIG. 2 is a schematic diagram of a loading system;
FIG. 3 is a front view of a preferred embodiment of an adjustable angle fastener fatigue test platform;
fig. 4 is an overall view of a preferred embodiment of an adjustable angle fastener fatigue test platform.
Description of the reference numerals
A 1-T-shaped bottom beam; 2-steering gear; 3-a servo motor; 4-screw elevator; 5-lifting sliding rails; 6-a horizontal locking mechanism; 7-a tooling platform; 8-lifting rings; 9-travelling wheels; 10-double servo motors; 11-an arc roller way; 12-an actuator; 13-a sensor; 14-loading a tool head; 15-test piece; 16-arc beam; 17-a stepper motor; 18-horizontal slide rails; 19-floor; 20-a reaction frame; 21-a structural member; 22-fixing the chain; 23-sprocket; 24-sleeper.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In the present invention, unless otherwise indicated, terms such as "upper, lower, left, right, front, rear, and inner and outer" and the like are used merely to denote the orientation of the term in a conventional use state or are commonly understood by those skilled in the art, and should not be construed as limiting the term.
Referring to fig. 1-4, the research method of the invention is based on an angle-adjustable fastener fatigue test platform, which comprises two symmetrically arranged actuators 12 which can be slidingly adjusted along the arc-shaped beam 16 and extend towards the center direction of the arc-shaped beam 16 and act on two sides of the rail head of the steel rail 15, and also comprises a lifting tool platform 7 which is arranged below the arc-shaped beam 16 and used for fixing the steel rail 15;
the research method comprises the following steps:
s1, adjusting an angle-adjustable fastener fatigue test platform to enable normal operation;
s2, calculating the lifting or lowering adjustment quantity of the tooling platform 7;
s3, acquiring known parameters, wherein the known parameters comprise:
the actuator 12 loading point lateral position a;
initial load height h of actuator 12 0 ；
The actuator 12 is loaded with a height h after the platform is lifted;
an initial angle α of the actuator 12;
calculating the rise or fall of the tool platform 7 by |h-h according to the acquired known parameters 0 Angle β of the rear actuator 12, the amount of elongation or contraction L of the actuator 12;
s4, adjusting the actuator 12 to a designated position according to the calculated value and then performing a fastener fatigue test;
and S5, closing the equipment after the fatigue test of the fastener is finished.
Through implementation of the technical scheme, the research method is suitable for fatigue tests of most types of fasteners based on the fatigue test platform of the fasteners with adjustable angles.
As shown in fig. 1 and 2, the invention can adjust the angleThe loading system of the fastener fatigue test platform is equivalently simplified, the simplified loading system uses the circle center of the arc beam 16 as the origin O of a rectangular coordinate system, the arc beam 16 is simplified into a large semicircle, the actuator 12 moves on the circle, the loading point of the actuator 12 is equivalent to a point A, B, the right actuator 12 is taken as an example in fig. 2, and the right actuator 12 passes through the right circle center of the rail head, namely the loading points A (a, h 0 ) At this time, the included angle between the straight line where the actuator 12 is located and the x coordinate axis is alpha; when the tooling platform 7 is lifted, the right-side actuator 12 passes through the center of the right side of the rail head, namely the loading point B (a, h), and the included angle between the straight line where the actuator 12 is positioned and the x coordinate axis is beta. The length of the actuator 12 is equivalent to the radius of the circle minus OA or OB.
The angle of the actuator 12 after the table is raised and the amount of elongation or contraction of the actuator 12 can be calculated from the simplified model:
as in one embodiment, the angle alpha of the actuator 12, the elevation height h-h of the tooling platform 7, is known to the initial state 0 The tooling platform 7 is lifted or lowered by |h-h 0 The calculation method of the angle β of the post-actuator 12 is: a×tanα=h 0 ，a×tanβ＝h，
The two formulas are subtracted to obtain the following formula: a×tan β -a×tan α=h-h 0 ，
I.e.
In this embodiment, the tooling platform 7 is raised or lowered by |h-h 0 The calculation method of the elongation or contraction amount L of the post actuator 12 is:
the actuator 12 is adjusted by combining the calculation formula with known parameters, so that the fatigue performance of the fastener is tested in a simple and efficient manner.
The method of investigation uses two actuators 12 to simultaneously apply cyclic loads of equal amplitude in two different directions to the rail head at predetermined load lines and positions. The magnitude, location and line of action of the load used in the test are determined by the vertical stiffness of the fastener assembly, the axle weight and the curve conditions of the section of the fastener to be tested. Curve conditions include curve radius and underheight. The performance of the fastener was determined by variation in the buckling pressure, longitudinal resistance of the rail 15, vertical stiffness and rail 15 position during the test, and by embedded inspection of the fastener components.
In the invention, the end of the actuator 12 facing the rail head of the steel rail 15 is sequentially provided with the sensor 13 and the loading tool head 14, and the loading tool head 14 is used for directly loading on a workpiece, namely, the rail head of the steel rail 15, and the specific loading position is shown in fig. 3, in addition, test data can be acquired through the sensor 13 for later analysis.
For example, in one embodiment, two actuators 12 with 150kN and loading frequency in the low frequency range of 3Hz-5Hz are used for collaborative test, the two actuators 12 output dynamic force values to the tested piece according to the same or different waveforms, and in the loading test process, the two actuators 12 can be changed to be positioned at different positions, and the angle of the applied force is changed, so that more test data are obtained.
In this embodiment, an arc roller way 11 is disposed on the upper surface of the arc beam 16, and a travelling wheel 9 corresponding to the arc roller way 11 is disposed on a structural member 21 on the actuator 12 for clamping the arc beam 16; the arc-shaped beam 16 is provided with a fixed chain 22 at the outer side of the arc-shaped roller way 11, the structural member 21 is provided with a motor, and the shaft body of the motor is provided with a sprocket 23 which can be positioned on the fixed chain 22 to match and roll. The arc beam 16 adopts a ring-shaped bearing frame, on which a motor is arranged to independently drive a chain wheel 23, the chain wheel 23 is positioned on a fixed chain 22 to roll so as to adjust the position, a slidable loading frame fixer is the structural member 21, and the function of installing the travelling wheel 9 on the loading frame fixer is to match the upper surface of the arc roller way 11 to slide, so as to play a role of guiding, and generally, two ends of the travelling wheel 9 positioned in the advancing direction are respectively provided with one, so that the stability of rolling operation can be improved.
In this embodiment, each actuator 12 is symmetrically provided with two structural members 21 along both sides in the axial direction parallel to the arc beam 16, and the arc beam 16 is provided with two structural members 21. Namely, two parallel arc beams 16 are arranged along the front-rear direction, a gap for allowing the actuator 12 to pass through is formed between the two arc beams 16, the front side and the rear side of the actuator 12 are respectively arranged on the two structural members 21, the two adjacent structural members 21 are identical in structure and are all provided with travelling wheels 9, the two arc beams 16 are identical in structure and are all provided with an arc roller way 11 and a fixed chain 22, motors are respectively arranged on the outer sides of the two arc beams 16, and the two motors respectively drive corresponding chain wheels 23 to be located on the respective chain wheels 23 for synchronous travelling.
In addition, for increasing holistic operational stability, be provided with connection structure between two structure 21, be that the upper end of two structure 21 passes through connection structure fixed connection for two structure 21 form holistic structure, in addition, can adopt the bolt to dismantle between two structure 21 and the connection structure and be connected, make things convenient for the dismantlement maintenance in the future. The actuator 12 is mounted on the connection structure, although the base of the actuator 12 may be used directly as the connection structure.
The motor at the outer side of the arc beam 16 adopts a double-servo motor 10, and the double-servo motor 10 and a chain wheel 23 are adopted to drive the integral loading part to move in an arc shape during movement; the universal ball can be used for being attached to the side face of the arc-shaped beam 16 for limiting during movement, so that the parallel movement is ensured, deflection and clamping stagnation are prevented, and the actuator 12 is ensured to freely walk on the arc-shaped roller way 11; the minimum angle of 45 deg. is loaded by both actuators 12 and both actuators 12 can be loaded horizontally. Real-time control can be carried out through a touch screen or a display screen, and convenience in the experimental process is guaranteed.
In addition, the device can also comprise an arc locking mechanism arranged on the structural member 21, and the arc locking mechanism drives the loading part to integrally move when being loaded, so that the bearing block on the loading part is tightly attached to the inner ring of the arc beam 16 to be locked, and the driving mechanism of the arc locking mechanism can be an oil cylinder.
Of course, the bottoms of the two arc beams 16 can also be welded into an integral structure through steel plates, and the steel plates and the reaction frame 20 can be detachably mounted through a plurality of bolts, so that the integral structure is more stable and easy to detach.
In this embodiment, for facilitating the hoisting and transferring, a plurality of hoisting rings 8 are provided on the tooling platform 7. The number and mounting position of the lifting loops 8 can be chosen as desired, for example: 4 lifting rings 8 are arranged and are respectively positioned near 4 corners of the tooling platform 7.
In this embodiment, a floor 19 is provided below the tooling platform 7, and the tooling platform 7 is provided on the floor 19 and is capable of adjusting lateral displacement in an axial direction parallel to the arc beam 16. By means of the arrangement of the floor 19, the tooling platform 7 can move transversely so as to move different positions of the steel rail 15 to the position of loading the tooling head 14 for testing. The two ends of the floor 19 can be provided with the stop pieces, so that the tool platform 7 is prevented from slipping off, the stop pieces can be replaced by the distance sensor 13, and when the end part of the tool platform 7 approaches the distance sensor 13 for a certain distance, the stop pieces are fed back to the system and guide the tool platform 7 to stop running continuously.
In this embodiment, a plurality of parallel dovetail grooves may be disposed on the tooling platform 7 for installing the sleeper 24 on the tooling platform 7, wherein a guide rail block matched with the dovetail grooves may be disposed at the bottom of the sleeper 24, and the sleeper 24 and the tooling platform 7 are fixed by a screw. Rail 15 is then mounted on sleeper 24 by spring strips.
In this embodiment, the floor 19 is provided with a horizontal movement driving mechanism capable of driving the tooling platform 7 to move, the floor 19 is further provided with a horizontal sliding rail 18, and the bottom surface of the tooling platform 7 is provided with a guide rail block matched with the horizontal sliding rail 18. The moving accuracy of the tooling platform 7 can be further improved through the horizontal moving driving mechanism. The tool platform 7 can longitudinally move out of the arc loading frame along with the test platform under the drive of the stepping motor 17 and the gear rack, so that the test sample can be conveniently installed and replaced.
The horizontal movement driving mechanism consists of a stepping motor 17, a speed reducer, a gear, a rack, a guide rail, a limiting block and the like. And a high-precision guide rail is selected, so that smooth walking and repeated precision are ensured. The linear guide rail and the lower platform are used for positioning, the total number of the guide rail blocks is 8, and the bearing of the independent guide rail blocks is not less than 150kN, so that the bearing requirement is met. The horizontal movement is realized by a stepping motor 17, a speed reducer, a driving gear and a rack. The horizontal movement function of the tooling platform 7 can be controlled in real time through a touch screen or a display screen, so that convenience in the experimental process is ensured.
In this embodiment, horizontal locking mechanisms 6 for clamping or unclamping the tooling platform 7 are provided on both sides of the floor 19 on the tooling platform 7. In order to prevent the guide rail from bearing a large load when the oil cylinder in the sensor 13 is subjected to angle loading, a horizontal locking mechanism 6 is designed. When the tooling platform 7 moves horizontally to the test position, the transversely extending nuts on the horizontal locking mechanism 6 are screwed down, so that the tooling platform 7 and the side supports are tightly supported to bear horizontal load.
The tool platform 7 and the floor 19 are integrally cast by gray cast iron, and are machined after casting, so that the surface precision and strength requirements are ensured. The tooling platform 7 is connected with the reaction frame 20 through the lifting slide rail 5, and resists the influence of lateral force on the lifter in the test process along with the lifting of the platform.
In this embodiment, a lifting mechanism is provided below the floor 19; the two sides of the floor 19 are provided with reverse sliding modules, the side surface of the reaction frame 20 facing the floor 19 is a vertical surface, and the vertical surface is provided with lifting sliding rails 5 corresponding to the reverse sliding modules.
For example, in one embodiment, the lifting mechanism is composed of a servo motor 3, a worm gear reducer, a steering gear 2 and a screw lifter 4, and the lifting stroke is about 400 mm. The six spiral lifters 4 work simultaneously, and a rigid coupling is adopted to ensure that the six lifters are arranged on the same horizontal plane and can synchronously move; unified adjustment is performed before installation, so that the same initial angle state is ensured; the upper mounting flange can be adjusted in height; the lateral force resistance of the lifting platform is compensated by a horizontal locking mechanism 6. By the mode, the defect that the linkage motions of the plurality of lifters are asynchronous can be avoided to the greatest extent, so that the accuracy of test results is guaranteed, and the heights of different sleepers 24 can be adjusted under the condition that the stability of a system is guaranteed. The servo motor 3 is responsible for driving the whole system to drive the mobile platform system to carry out height adjustment, closed-loop control is carried out through the servo motor 3 driver and the PLC simultaneously, and real-time control is carried out in cooperation with the touch screen or the display screen, so that the positioning of the height position of the tooling platform 7 is realized, and the convenience of the experimental process is ensured.
The spiral lifter 4 drives the platform to lift to a designated position, the locking oil cylinder drives the locking support to clamp the lifting screw rod to prevent the movement, the stability and the reliability of the lifting platform are improved, and then a loading fatigue test is carried out.
In this embodiment, the lifting mechanism is supported by the T-shaped bottom beam 1, the reaction frame 20 is disposed at a position extending in the lateral direction from the T-shaped bottom beam 1, and the lifting mechanism is disposed at a position extending in the longitudinal direction from the T-shaped bottom beam 1. By the arrangement, the occupied area of the whole equipment can be saved to the greatest extent. The arc beam 16, the T-shaped bottom beam 1 and the reaction frame 20 form an annular bearing frame together, and the main body material is processed by adopting Q345B post-welding aging treatment.
The annular bearing frame can bear part of bearing, and the maximum vertical bearing is required to be ensured to be not lower than 300kN; the maximum horizontal bearing is not lower than + -200 kN. The arc beams 16 on the two sides are formed by one-step processing, so that the consistency of the arc beams is ensured, the two actuators 12 can perform circular motion on the annular roller way by matching with the travelling wheels 9, and the intersection point of the extension lines of the loading heads of the two actuators 12 is ensured to be positioned on the circle center of the annular bearing frame. The reaction frame 20 is required to be kept vertical during processing. Under the condition of ensuring the integral strength, the requirement of mounting precision is ensured. The joint is provided with a positioning spigot and a positioning pin, so that the integral assembly precision, strength and shearing resistance are ensured.
With the gradual expansion of research on fatigue performance of spring strips of a high-speed railway fastener system in recent years, a fatigue experiment on the fastener system needs to be developed, and a key stage parameter model for fatigue process identification is provided. Therefore, the research and development of the angle-adjustable fatigue testing machine has great significance for the research of the fasteners and the track structure system, and fills the technical reserve blank in the field of the bidirectional loading of the angle-adjustable fasteners at present.
In addition, the invention can be provided with an integrated control system, so that fatigue tests can be more accurately and efficiently carried out on fasteners of various types, for example, the needed position information of the fasteners of corresponding types and the steel rail 15 can be input into the system, and the steel rail 15 of corresponding types can be directly selected for automatic adjustment of the machine position and automatic fatigue test when the test is carried out next time.
Of course, in the present invention, an angle scale may be disposed on the outer side of the inner ring of the arc beam 16, and a scale pointer may be disposed on the side of the actuator 12, and the scale pointer may be used in combination with the angle scale, so as to quickly understand the loading angle.
In the present invention, the actuator 12 may be an MTS actuator, and the sensor 13 may be an MTS sensor.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (10)
1. The research method of the fatigue test of the angle-adjustable fastener is characterized by being based on an angle-adjustable fastener fatigue test platform, wherein the angle-adjustable fastener fatigue test platform comprises two actuators (12) which are symmetrically arranged, can be slidingly adjusted along the arc-shaped beam (16) and extend towards the center direction of the arc-shaped beam (16) and act on two sides of the rail head of a steel rail (15), and further comprises a lifting tool platform (7) which is arranged below the arc-shaped beam (16) and used for fixing the steel rail (15);
the research method comprises the following steps:
s1, adjusting an angle-adjustable fastener fatigue test platform to enable normal operation;
s2, calculating the lifting or lowering adjustment quantity of the tooling platform (7);
s3, acquiring known parameters, wherein the known parameters comprise:
an actuator (12) loading point lateral position a;
initial loading height h of actuator (12) 0 ；
The loading height h of the actuator (12) after the platform is lifted;
an initial angle alpha of the actuator (12);
calculating the lifting or lowering of the work platform (7) by |h-h according to the acquired known parameters 0 An angle beta of the rear actuator (12), and an elongation or contraction amount L of the actuator (12);
s4, adjusting the actuator (12) to a designated position according to the calculated value and then performing a fastener fatigue test;
and S5, closing the equipment after the fatigue test of the fastener is finished.
2. The research method of fatigue test of the angle-adjustable fastener according to claim 1, wherein the tooling platform (7) is raised or lowered by |h-h 0 The calculation method of the angle beta of the rear actuator (12) is as follows: a×tanα=h 0 ，a×tan β＝h，
The two formulas are subtracted to obtain the following formula: a×tan β -a×tan α=h-h 0 ，
I.e.
3. The method for researching fatigue test of an adjustable angle fastener according to claim 2, wherein the method comprises the following steps ofThe tooling platform (7) rises or lowers the angle of I h-h 0 The calculation method of the elongation or contraction L of the post-actuator (12) is as follows:
4. the research method of the fatigue test of the angle-adjustable fastener according to claim 1, characterized in that an arc roller way (11) is arranged on the upper surface of the arc beam (16), and a travelling wheel (9) corresponding to the arc roller way (11) is arranged on a structural member (21) on the actuator (12) for clamping the arc beam (16);
the novel roller table is characterized in that a fixed chain (22) is arranged on the arc-shaped beam (16) and located at the outer side of the arc-shaped roller table (11), a motor is arranged on the structural member (21), and a sprocket (23) capable of being located on the fixed chain (22) and matched with rolling is arranged on the shaft body of the motor.
5. The method for studying fatigue test of angle-adjustable fastener according to claim 4, wherein each actuator (12) is symmetrically provided with two structural members (21) along two sides in an axial direction parallel to the arc-shaped beam (16), and the arc-shaped beam (16) is correspondingly provided with two structural members (21).
6. The method for researching fatigue test of the angle-adjustable fastener according to claim 1, wherein a floor (19) is arranged below the tooling platform (7), and the tooling platform (7) is arranged on the floor (19) and can adjust transverse displacement along an axial direction parallel to the arc-shaped beam (16).
7. The research method of the fatigue test of the angle-adjustable fastener according to claim 6, characterized in that a horizontal movement driving mechanism capable of driving the tooling platform (7) to move is arranged on the floor (19), a horizontal sliding rail (18) is further arranged on the floor (19), and a guide rail block matched with the horizontal sliding rail (18) is arranged on the bottom surface of the tooling platform (7).
8. The method for researching fatigue test of the angle-adjustable fastener according to claim 6, wherein horizontal locking mechanisms (6) for clamping or loosening the tool platform (7) are arranged on two sides of the tool platform (7) on the floor (19).
9. The method for researching fatigue test of the adjustable angle fastener according to claim 6, wherein the fatigue test platform of the adjustable angle fastener further comprises a reaction frame (20);
a lifting mechanism is arranged below the floor (19);
the lifting mechanism is supported and arranged on the T-shaped bottom beam (1), and the reaction frame (20) is arranged at a position extending transversely to the T-shaped bottom beam (1);
the arc-shaped beam (16), the T-shaped bottom beam (1) and the reaction frame (20) form an annular bearing frame together;
the two sides of the floor (19) are provided with reverse sliding modules, the side surface of the reaction frame (20) facing the floor (19) is a vertical surface, and the vertical surface is provided with a lifting sliding rail (5) corresponding to the reverse sliding modules.
10. The method for researching fatigue test of an angle-adjustable fastener according to claim 9, wherein the lifting mechanism is arranged on the T-shaped bottom beam (1) at a position extending along the longitudinal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310001286.4A CN116007920B (en) | 2023-01-03 | 2023-01-03 | Research method for fatigue test of angle-adjustable fastener |
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