Cable type tire bead fatigue testing machine and cable type tire bead fatigue failure detection method

Abstract

The invention discloses a cable type tire bead fatigue testing machine and a cable type tire bead fatigue failure detection method. The cable type tire bead fatigue testing machine comprises a rack; the expansion assembly and the expansion driving assembly are mounted in the rack, and the expansion assembly is used for sleeving a steel ring of a cable type tire bead to be detected and applying an acting force outwards from the center along a normal line to the steel ring under the driving of the expansion driving assembly; the detection assembly is installed in the rack and used for detecting deformation quantity data of the steel ring in the process that the expansion assembly applies force to the steel ring; and the controller is used for controlling the operation of the expansion driving assembly, receiving the steel ring tensioning position data transmitted by the detection assembly, calculating steel ring deformation quantity data according to the steel ring tensioning position data, and judging the fatigue state of the steel ring. The cable type tire bead fatigue testing machine is reasonable, compact and ingenious in structure, small in occupied area, simple and convenient to operate and accurate and sensitive in detection.

Description

Technical Field

[0001] The present invention relates to the technical field of steel ring fatigue testing machines, and particularly to a cable-type bead fatigue testing machine and a cable-type bead fatigue failure detection method. Background Art

[0002] The cable-type bead wire ring is composed of a relatively thick core wire welded into a ring and relatively thin outer winding wires spirally wound around the core wire. The outer layer wires of the cable-type bead are both on the inner side and the outer side of the bead cross-section. Compared with the traditional bead, the force on the bead cross-section is more uniform. Due to the characteristics of the cable, the cable-type bead has a more stable structure and good impact resistance. Since aircraft tires bear huge impact forces, the cable-type bead has greater advantages when used in aircraft tires. The development of aircraft tires in China started relatively late. In the early stage, the bead adopted a traditional hexagonal structure design, and later a cable-type bead with a circular cross-section was adopted, but basically supplied by foreign countries, and the technology and production equipment of the cable-type bead were kept secret and strictly restricted. With the development needs of the industry, especially the self-development of large aircraft such as C919 and C929, the requirement for the localization of aircraft tires is becoming more and more urgent. Therefore, developing a cable-type bead suitable for aircraft tires is the key research topic in the industry.

[0003] At present, there is no unified standard for the relevant fatigue failure detection data, methods and equipment of the cable-type bead. There are differences among various manufacturers, and most of them cannot be close to the actual working state of the cable-type bead. Summary of the Invention

[0004] Objective: In order to overcome the deficiencies in the prior art, the present invention provides a cable-type bead fatigue testing machine, which can simulate the working state of the cable-type bead and detect its fatigue characteristics.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0006] In the first aspect, the present invention provides a cable-type bead fatigue testing machine, including a frame; An expansion assembly and an expansion drive assembly, installed inside the frame. The expansion assembly is used to sleeve the steel ring of the cable-type bead to be tested, and apply a force from the center along the normal line outward to the steel ring under the drive of the expansion drive assembly; A detection assembly, installed inside the frame, used to detect the deformation data of the steel ring during the process of the expansion assembly applying force to the steel ring; A controller, used to control the operation of the expansion drive assembly, and receive the steel ring tension position data transmitted by the detection assembly, and calculate the steel ring deformation data according to the steel ring tension position data to judge the fatigue state of the steel ring.

[0007] The inside of the frame integrates an expansion component, an expansion driving component, a detection component and a controller, with a compact structure, reducing external interference during the test; the controller can centrally control the operation of the expansion driving component and transmit data, simplifying user operation.

[0008] The setting of the expansion component can apply a force from the center along the normal line outward to the steel ring of the cable bead, simulating the contact stress between the cable bead and the wheel hub during use, making the test closer to the real use scenario; the expansion driving component can adjust the force applied to the steel ring under the adjustment of the controller, simulating the fatigue process of aviation tires of different models.

[0009] In some embodiments, the expansion component includes a ratchet and a plurality of expansion block units evenly distributed along the outer periphery of the ratchet; Chute grooves corresponding to each expansion block unit are radially formed in the ratchet; The expansion block unit includes an expansion block, a roller and a roller shaft. The expansion component has an expanded state and a reset state. In the reset state, all the expansion blocks are butted into a circular ring structure; The expansion block is slidably connected to a guide rail fixed seat fixed to the frame through a guide rail. A working groove for accommodating the steel ring is formed on the outer periphery of the expansion block; One end of the roller shaft is fixed to the expansion block, and the other end is installed with the roller. The roller is in rolling connection with the chute groove of the ratchet, and is used to drive the expansion block unit to perform a translational movement when the ratchet rotates, so as to tension or release the steel ring.

[0010] The combination of the ratchet and the expansion block unit can make the outer diameter of the expansion block unit variable, and then apply a force from the inside to the outside to the steel ring of the cable bead; moreover, it can apply a uniform radial force to the steel ring, ensuring that the force applied to the steel ring during the test is evenly distributed, and avoiding inaccurate test results caused by excessive local stress; the expansion block unit slides along the direction defined by the fixed seat through the guide rail, and can be applicable to steel rings of different sizes, with high equipment versatility.

[0011] In some embodiments, the expansion driving component includes a cylinder, a force arm and a transmission shaft; one end of the force arm is connected to the push rod of the cylinder, and the other end is connected to the transmission shaft; the other end of the transmission shaft is fixedly connected to the rotating shaft of the ratchet in the expansion unit; The telescopic movement of the cylinder push rod is transmitted to the ratchet through the force arm and the transmission shaft, for driving the ratchet to rotate.

[0012] In some embodiments, the expansion block includes a first expansion block and a second expansion block fixedly connected. A first working groove for accommodating the steel ring is formed on the outer periphery of the first expansion block, and a second working groove for accommodating the steel ring is formed on the outer periphery of the second expansion block; The diameter of the circular ring structure formed by all the first expansion blocks is smaller than the diameter of the circular ring structure formed by all the second expansion blocks.

[0013] The setting of the second expansion block enables the device to adapt to steel rings of more diameters. If the diameter of the steel ring to be tested is not within the range that the first expansion block can detect, the steel ring is placed in the second working groove on the second expansion block for testing, further improving the versatility of the device.

[0014] In some embodiments, the guide rail is a linear guide rail, and the extending direction of the linear guide rail connected to each expansion block is parallel to the radial direction of the ratchet wheel.

[0015] In some embodiments, the chute uniformly opened along the radial direction of the ratchet wheel has an eccentric sector waist groove shape.

[0016] In some embodiments, the detection assembly includes a sliding seat slidably and limitedly installed in the frame, and a pressure detection unit and a deformation amount detection unit installed on the sliding seat; The pressure detection unit includes a detection rod and a tension sensor. One end of the tension sensor is fixedly connected to the sliding seat, and the other end is detachably connected to the detection rod. The other end of the detection rod faces the expansion block in the expansion assembly; The deformation amount detection unit includes a detection piece and a laser distance sensor arranged oppositely. The laser distance sensor is fixedly arranged on the sliding seat, and the detection piece is fixedly arranged on the edge of the expansion block in the expansion assembly; it is used to obtain the tension position data of the detection piece during the test for calculating the deformation amount deviation value of the steel ring.

[0017] Therefore, during the test, the laser distance sensor can monitor the change of the steel ring diameter, detect the displacement amount of fatigue deformation, and determine that the steel ring is fatigued and failed when the set failure deformation displacement amount is reached. The cooperation of the tension sensor and the laser distance sensor can accurately measure the deformation amount and tension change of the cable bead, ensuring the accuracy of the test data.

[0018] In some embodiments, the cable bead fatigue testing machine further includes: a human-machine interface installed on the outer shell of the frame, used for displaying the test process data, and for the user to set the test parameters and transmit the test parameters to the controller; Wherein, the test parameters include the inflation amount, inflation times, pressure holding time, exhaust time of the cylinder in the expansion driving assembly, and the deformation amount deviation threshold data of the steel ring; the test process data includes the current cylinder inflation times, the cylinder operation state, and the deformation amount deviation data of the steel ring; The controller controls the operation of the cylinder in the expansion driving assembly according to the test parameters.

[0019] The human-machine interface can display the test process. After the data acquired by the laser ranging sensor is transmitted to the controller, the controller can also analyze the deformation data of the steel ring in a timely manner. Further, based on the acquired test data, parameters such as the bearing capacity and elastic coefficient of the steel wire can also be calculated. These direct and indirect data can be used for later analysis to help determine the failure critical point of the steel ring and provide specific data support for the adjustment of the subsequent production process.

[0020] In a second aspect, the present invention provides a method for detecting the fatigue failure of a cable-type bead, using the cable-type bead fatigue testing machine as described in the first aspect. The method includes: S1. Fit the steel ring of the cable-type bead to be tested into the working groove on the outer periphery of the expansion block, and use the human-machine interface to set the detection pressure threshold of the steel ring, the deformation deviation threshold of the steel ring, as well as the number of times the air cylinder is inflated and the pressure holding time. S2. Adjust the position of the detection rod so that the detection rod abuts against the guide rail. S3. Control the air cylinder to inflate to tension the steel ring. When the pressure data detected by the tension sensor reaches the detection pressure threshold, the controller controls the air cylinder to stop inflating, detects the initial tension position of the steel ring through the detection component, and records the inflation volume of the air cylinder. S4. Control the air cylinder to exhaust, and the controller records the exhaust time required for the exhaust to be completed. S5. Remove the detection rod. S6. Through the controller, according to the inflation volume, exhaust time, as well as the number of times the air cylinder is inflated and the pressure holding time, control the air cylinder to cycle inflate and exhaust to perform operations of tensioning, pressure holding, and releasing the steel ring in a cycle, and detect the tension position of the steel ring in each pressure holding state through the detection component, and calculate the deformation deviation data of the steel ring in combination with the initial tension position. S7. When the deformation deviation of the steel ring exceeds the deformation deviation threshold of the steel ring, the controller determines that the steel ring of the cable-type bead is fatigued and fails.

[0021] In some embodiments, when the deformation deviation of the steel ring exceeds the deformation deviation threshold of the steel ring, the controller controls the air cylinder to stop inflating again.

[0022] This method is implemented based on the preset program of the controller. The user only needs to set the test parameters at the human-machine interface, with a high degree of intelligence, and can automatically determine whether the steel ring is fatigued and fails, reducing human misjudgment. In addition, this method can run continuously for a long time, so it can be used for high-strength fatigue testing of the steel ring in the cable-type bead and is applicable to the cable-type bead of aviation tires.

[0023] Beneficial effects: The frame of the bead fatigue testing machine provided by the present invention integrates an expansion component, an expansion driving component, a detection component, and a controller. It has a reasonable and compact structure and can be applied to the fatigue testing of steel rings in various sizes of cable-type beads. Under the adjustment of the expansion driving component, the expansion component can simulate the usage scenario of the cable-type bead, effectively detect the fatigue characteristics of the steel ring, make the test results closer to reality, and provide data support for the adjustment of the production process. The controller centrally controls the operation of the expansion driving component and transmits data, with a high degree of automation and simplified operation. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is a schematic external view of the bead fatigue testing machine in the embodiment of the present invention.

[0026] Figure 2 It is a schematic structural view of the expansion component in the embodiment of the present invention;

[0027] Figure 3 It is a schematic view of the reset state of the expansion block in the embodiment of the present invention;

[0028] Figure 4 It is a schematic view of the expansion state of the expansion block in the embodiment of the present invention;

[0029] Figure 5 It is an axonometric view of the expansion state of the expansion block in the embodiment of the present invention;

[0030] Figure 6 It is a schematic structural view of the first expansion block in the embodiment of the present invention;

[0031] Figure 7 It is a schematic structural view of the second expansion block in the embodiment of the present invention;

[0032] Figure 8 It is a schematic external view of the ratchet in the embodiment of the present invention;

[0033] Figure 9 It is a schematic structural view of the tension detection component in the embodiment of the present invention;

[0034] Figure 10 It is a schematic view of the working state of the tension detection component in the embodiment of the present invention.

[0035] In the figure: 1 frame, 2 man-machine interface, 3 detection component, 4 expansion component, 5 cylinder, 6 lever arm, 7 rotating shaft, 8 bearing seat, 9 bearing, 10 guide rail fixing seat, 11 guide rail, 12 first expansion block, 121 first working groove, 13 ratchet wheel, 131 chute, 14 washer, 15 roller, 16 roller shaft, 17 second expansion block, 171 second working groove, 18 steel ring, 19 detection piece, 20 detection rod, 21 tension sensor, 22 slider, 23 limit support, 24 fixing bracket for laser distance measuring sensor, 25 laser distance measuring sensor, 26 fixing seat, 27 displacement adjusting screw. Specific implementation mode

[0036] Next, the technical solutions in the embodiments will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention and its application or use.

[0037] Unless otherwise specifically stated, the relative arrangements, numerical expressions and numerical values of the components and steps described in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may also include different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0038] Embodiment 1:

[0039] As Figure 1 shown, this embodiment provides a cable-type bead fatigue testing machine, including: frame 1; Expansion component 4 and expansion driving component, installed inside the frame 1. The expansion component 4 is used to sleeved the steel ring 18 of the cable-type bead to be tested, and apply a force from the center along the normal line outward to the steel ring 18 under the drive of the expansion driving component; Detection component 3, installed inside the frame 1, and used to detect the deformation data of the steel ring 18 during the process of the expansion component 4 applying force to the steel ring 18; The controller is installed inside the rack 1 and is used to control the operation of the expansion drive assembly, receive the tension position data of the steel ring 18 transmitted by the detection assembly 3, calculate the deformation data of the steel ring 18 based on the tension position data of the steel ring, and judge the fatigue state of the steel ring 18.

[0040] As Figure 2 , Figure 8 shown, the expansion assembly 4 includes a ratchet wheel 13 and a plurality of expansion block units evenly distributed along the outer circumference of the ratchet wheel 13; A chute 131 corresponding to each expansion block unit is radially formed in the ratchet wheel 13; The expansion block unit includes an expansion block, a roller 15 and a roller shaft 16. The expansion assembly 4 includes an expansion state and a reset state. In the reset state, all the expansion blocks are butted into a circular ring structure; The expansion block is slidably connected to the guide rail fixing seat 10 fixed to the rack 1 through a guide rail 11. The guide rail 11 can slide along the direction defined by the guide rail fixing seat 10. A working groove for accommodating the steel ring 18 is formed on the outer circumference of the expansion block; One end of the roller shaft 16 is fixed to the expansion block, and the roller 15 is installed at the other end. The roller 15 is in rolling connection with the chute 131 of the ratchet wheel 13 and is used to drive the expansion block unit to perform a translational movement when the ratchet wheel 13 rotates, so as to tension or release the steel ring 18 and simulate the working state of the cable-type bead.

[0041] As Figure 3 shown, in the reset state, the expansion blocks of the expansion assembly 4 form a circular ring structure; As Figure 4 , Figure 5 shown, in the expansion state, the ratchet wheel 13 rotates and applies tension to the roller 15, and the corresponding expansion block is driven by the roller 15 to translate radially outward along the ratchet wheel 13, applying tension to the inner side of the steel ring 18.

[0042] Further, the expansion block unit further includes a washer 14. The washer 14 is sleeved on the roller shaft 16 and is axially located between the roller 15 and the ratchet wheel 13 along the roller shaft 16.

[0043] As Figure 1 , Figure 2 shown, the expansion drive assembly includes a cylinder 5, a force arm 6 and a transmission shaft 7; the cylinder 5 is installed on the bottom platform of the rack 1 and can drive the force arm 6 to rotate; one end of the force arm 6 is connected to the push rod of the cylinder 5, and the other end is connected to the transmission shaft 7; the other end of the transmission shaft 7 is fixedly connected to the rotating shaft of the ratchet wheel 13 in the expansion unit; The telescopic movement of the push rod of the cylinder 5 is transmitted to the ratchet wheel 13 through the force arm 6 and the transmission shaft 7, and is used to drive the ratchet wheel 13 to rotate.

[0044] In this embodiment, the rotation angle of the force arm 6 when it is in the horizontal position is 0°, and the rotation angle range of the force arm 6 is 0 to 30°.

[0045] As Figure 6 、 Figure 7 shown, the expansion block includes a first expansion block 12 and a second expansion block 17 that are fixedly connected. A first working groove 121 for accommodating a steel ring 18 is provided on the outer periphery of the first expansion block 12, and a second working groove 171 for accommodating the steel ring 18 is provided on the outer periphery of the second expansion block 17; The diameter of the circular ring structure formed by all the first expansion blocks 12 is smaller than the diameter of the circular ring structure formed by all the second expansion blocks 17.

[0046] In this embodiment, the guide rail 11 is a linear guide rail, and the extending direction of the linear guide rail connected to each expansion block is parallel to the radial direction of the ratchet 13.

[0047] As Figure 8 shown, the chute 131 uniformly provided along the radial direction of the ratchet 13 on the ratchet 13 is in the shape of an eccentric sector waist groove.

[0048] As Figure 9 、 Figure 10 shown, the detection assembly 3 includes a sliding seat slidably and limitedly installed in the frame 1, and a pressure detection unit and a deformation detection unit installed on the sliding seat; The pressure detection unit includes a detection rod 20 and a tension sensor 21. One end of the tension sensor 21 is fixedly connected to the sliding seat, and the other end is detachably connected to the detection rod 20. The other end of the detection rod 20 faces the expansion block in the expansion assembly 4; The deformation detection unit includes a detection piece 19 and a laser distance sensor 25 arranged oppositely. The laser distance sensor 25 is fixedly arranged on the sliding seat, and the detection piece 19 is fixedly arranged on the edge of the expansion block in the expansion assembly 4; it is used to obtain the tension position data of the detection piece 19 during the test for calculating the deformation deviation value of the steel ring 18.

[0049] Specifically, the sliding seat includes a slider 22, two limit supports 23, a fixed seat 26 and a displacement adjustment screw 27. The limit supports 23 limit the slider 22 so that the slider 22 can only slide in a fixed direction; the laser distance sensor 25 is fixed on the slider 22 through a laser distance sensor fixing bracket 24; the screw handle part of the displacement adjustment screw 27 is fixedly connected to the frame 1 through the fixed seat 26, and the threaded part is threadedly connected to the slider 22 for changing the position of the slider 22 to control the contact between the detection rod 20 and the guide rail 11 in the expansion assembly 4.

[0050] Figure 10It is a structural diagram of the detection component 3 in the working state, at which time the detection rod 20 on the tension sensor 21 is in contact with the guide rail 11 in the expansion component 4. During the test, the expansion component 4 applies tension to the steel ring 18, and the pressure between the guide rail 11 and the detection rod 20 on the tension sensor 21 increases. The real-time pressure data is read by the tension sensor 21, and when the pressure value set by the detection is reached, the expansion component 4 stops applying pressure to the steel ring 18. The laser ranging sensor 25 can continuously monitor the change in the ring diameter of the steel ring 18 in the cable-type tire bead during the test. When the steel ring deformation deviation threshold is reached, the equipment stops, records the number of pulse tensions applied to the steel ring at this time, that is, the number of cylinder openings, and determines whether the steel ring is fatigue-failed.

[0051] In this embodiment, the cable-type tire bead fatigue testing machine further includes a human-machine interface 2, which is installed on the housing of the frame 1 and is used to display test process data and allow the user to set test parameters and transmit the test parameters to the controller; The test parameters include the inflation volume, inflation times, pressure holding time, exhaust time of the cylinder 5 in the expansion drive assembly, and the deformation deviation threshold data of the steel ring 18; the test process data includes the current inflation times of the cylinder 5, the operating state of the cylinder 5 and the deformation deviation data of the steel ring 18; The controller controls the operation of the cylinder 5 in the expansion drive assembly according to the test parameters.

[0052] Embodiment 2:

[0053] This embodiment provides a cable-type tire bead fatigue failure detection method, using the cable-type tire bead fatigue testing machine as described in the first embodiment, the method comprising: S1, put the steel ring 18 of the cable-type tire bead to be tested into the working groove on the outer periphery of the expansion block, and use the human-machine interface 2 to set the detection pressure threshold of the steel ring 18, the deformation deviation threshold of the steel ring 18, and the number of inflation times and pressure holding time of the cylinder 5; S2, rotating the displacement adjustment screw 27 to adjust the position of the slider 22 so that the detection rod 20 abuts against the guide rail 11; S3, inflate the cylinder 5, and the push rod of the cylinder 5 extends out, and transmits the air to the ratchet 13 through the lever arm 6 and the transmission shaft 7, so that the ratchet rotates at a certain angle; Under the action of multiple groups of eccentric fan-shaped waist grooves 131 evenly distributed on the ratchet 13, the expansion block unit composed of the guide rail 11, the expansion block 12, the washer 14, the roller 15 and the roller shaft 16 is translated from the center of the circle to the surrounding areas along the direction limited by the guide rail fixing seat 10 to tighten the steel ring 18; Using the PLC program in the controller for control, continuously pressurize and inflate the cylinder 5. When the pressure data detected by the tension sensor 21 reaches the detected pressure threshold, the controller controls the cylinder to stop inflating, detects the initial tension position of the steel ring through the detection component, and records the inflation volume of the cylinder 5; S4. Use the PLC program in the controller to control the exhaust of the cylinder 5, the ratchet 12 returns to its original position, and the controller records the exhaust time required for the exhaust to be completed; S5. Remove the detection rod 20; S6. Restart the equipment again, and set test parameters through the controller: the inflation volume of the cylinder 5, the exhaust time, the number of inflation times, and the pressure holding time, where the inflation volume of the cylinder 5 is the inflation volume recorded in S3; Inflate the cylinder 5 to the set inflation volume, keep it for a period of time and then exhaust, and cycle the operations of inflating, pressure holding, and exhausting the cylinder 5; the PLC program in the controller records the number of inflation times of the cylinder 5, and when the set number of inflation times is reached, the controller stops this cycle; Read the position value of the detection piece 19 in the pressure holding state of the cylinder 5 through the laser distance sensor 25, generate a dynamic displacement diagram using the PLC program, and display it at the human-machine interface 2; Since the detection piece 19 is horizontal, therefore, calculate the steel ring deformation deviation value according to the current position value and the initial position value of the detection piece 19 on the horizontal axis, that is, the steel ring deformation deviation value = |the current position value of the detection piece 19 - the initial position value|; S7. When the steel ring deformation deviation value exceeds the steel ring deformation deviation threshold, the equipment alarms and stops, and the controller determines that the steel ring 18 of the cable-type bead is fatigued and fails.

[0054] In some embodiments, when the steel ring 18 deformation deviation exceeds the steel ring deformation deviation threshold, the controller controls the cylinder 5 to stop inflating again.

[0055] In the description of the present disclosure / this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only used to explain the relative positional relationship and movement conditions between the components in a certain specific posture. If this specific posture changes, then this directional indication also changes accordingly. It is only for the convenience of describing the present disclosure / this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present disclosure / this application.

[0056] In addition, terms such as "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more such features. In the description of the present disclosure / application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0057] In the description of the present disclosure / application, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be construed broadly. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure / application can be understood through specific circumstances.

[0058] The above are only the preferred embodiments of the present disclosure / application. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present disclosure / application, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present disclosure / application.

Claims

1. A cable-type bead fatigue testing machine, characterized in that including a frame (1); an expansion component (4) and an expansion driving component, which are installed inside the frame (1). The expansion component (4) is used to sleeved the steel ring (18) of the cable bead to be measured, and apply a force from the center along the normal line outward to the steel ring (18) under the drive of the expansion driving component; a detection component (3), which is installed inside the frame (1), and is used to detect the deformation data of the steel ring (18) during the process of the expansion component (4) applying force to the steel ring (18); a controller, which is used to control the operation of the expansion driving component, and receive the tension position data of the steel ring (18) transmitted by the detection component (3), and calculate the deformation data of the steel ring (18) according to the tension position data of the steel ring, and judge the fatigue state of the steel ring (18).

2. The cable-type bead fatigue testing machine according to claim 1, wherein, The expansion component (4) includes a ratchet wheel (13) and a plurality of expansion block units evenly distributed along the outer circumference of the ratchet wheel (13); Chute grooves corresponding to each expansion block unit are radially formed in the ratchet wheel (13); The expansion block unit includes an expansion block, a roller (15) and a roller shaft (16). The expansion component (4) includes an expansion state and a reset state. In the reset state, all the expansion blocks are butted into a circular ring structure; The expansion block is slidably connected to a guide rail fixed seat (10) fixedly connected to the frame (1) through a guide rail (11), and a working groove for accommodating the steel ring (18) is formed in the outer circumference of the expansion block; One end of the roller shaft (16) is fixed to the expansion block, and the other end is installed with the roller (15). The roller (15) is in rolling connection with the chute groove of the ratchet wheel (13), and is used to drive the expansion block unit to perform a translation movement when the ratchet wheel (13) rotates, so as to tension or release the steel ring (18).

3. The cable-type bead fatigue testing machine according to claim 2, wherein The expansion driving component includes a cylinder (5), a force arm (6) and a transmission shaft (7); one end of the force arm (6) is connected to the push rod of the cylinder (5), and the other end is connected to the transmission shaft (7); the other end of the transmission shaft (7) is fixedly connected to the rotating shaft of the ratchet wheel (13) in the expansion unit; The expansion and contraction of the push rod of the cylinder (5) is transmitted to the ratchet wheel (13) through the force arm (6) and the transmission shaft (7), and is used to drive the ratchet wheel (13) to rotate.

4. The cable-type bead fatigue testing machine according to claim 2, characterized in that, The expansion block includes a first expansion block (12) and a second expansion block (17) fixedly connected. A first working groove (121) for accommodating the steel ring (18) is formed in the outer circumference of the first expansion block (12), and a second working groove (171) for accommodating the steel ring (18) is formed in the outer circumference of the second expansion block (17); The diameter of the circular ring structure composed of all the first expansion blocks (12) is smaller than the diameter of the circular ring structure composed of all the second expansion blocks (17).

5. The cable-type bead fatigue testing machine according to claim 2, characterized in that, The guide rail (11) is a linear guide rail, and the extending direction of the linear guide rails connected to each expansion block is parallel to the radial direction of the ratchet wheel (13).

6. The cable-type bead fatigue testing machine according to claim 2, wherein, The chute grooves uniformly formed along the radial direction of the ratchet wheel (13) on the ratchet wheel (13) are in the shape of eccentric sector waist grooves.

7. The cable-type bead fatigue testing machine according to claim 3, characterized in that, The detection component (3) includes a sliding seat slidably and limitedly installed in the frame (1), and a pressure detection unit and a deformation detection unit installed on the sliding seat; The pressure detection unit includes a detection rod (20) and a tension sensor (21). One end of the tension sensor (21) is fixedly connected to the sliding seat, and the other end is detachably connected to the detection rod (20). The other end of the detection rod (20) faces the expansion block in the expansion component (4). The deformation amount detection unit includes a detection piece (19) and a laser ranging sensor (25) arranged opposite to each other. The laser ranging sensor (25) is fixedly arranged on the sliding seat, and the detection piece (19) is fixedly arranged at the edge of the expansion block in the expansion component (4). It is used to obtain the tension position data of the detection piece (19) during the test for calculating the deformation amount deviation value of the steel ring (18).

8. The cable-type bead fatigue testing machine according to claim 7, wherein, It further includes: A human-machine interface (2), installed on the outer shell of the frame (1), for displaying the test process data, allowing the user to set the test parameters, and transmitting the test parameters to the controller. Among them, the test parameters include the inflation amount, inflation times, pressure holding time, exhaust time of the cylinder (5) in the expansion drive component, and the deformation amount deviation threshold data of the steel ring (18). The test process data includes the current inflation times of the cylinder (5), the operating state of the cylinder (5), and the deformation amount deviation data of the steel ring (18). The controller controls the operation of the cylinder (5) in the expansion drive component according to the test parameters.

9. A method for detecting the fatigue failure of a cable-type bead, characterized in that, Using the cable-type bead fatigue testing machine as claimed in claim 8, the method includes: S1. Fit the steel ring (18) of the cable-type bead to be tested onto the working groove on the outer periphery of the expansion block, and use the human-machine interface (2) to set the detection pressure threshold of the steel ring (18), the deformation amount deviation threshold of the steel ring (18), as well as the cylinder inflation times and pressure holding time. S2. Adjust the position of the detection rod (20) so that the detection rod (20) abuts against the guide rail (11). S3. Control the cylinder (5) to inflate to tension the steel ring (18). When the pressure data detected by the tension sensor (21) reaches the detection pressure threshold, the controller controls the cylinder to stop inflating. Detect the initial tension position of the steel ring through the detection component and record the inflation amount of the cylinder (5). S4. Control the cylinder (5) to exhaust, and the controller records the exhaust time required for the exhaust to be completed. S5. Remove the detection rod (20). S6. Through the controller, according to the inflation amount, exhaust time, cylinder inflation times, and pressure holding time, control the cylinder to cycle inflate and exhaust, so as to perform operations of tensioning, pressure holding, and releasing on the steel ring (18) in a cycle, and detect the tension position of the steel ring (18) in each pressure holding state through the detection component, and calculate the deformation amount deviation data of the steel ring in combination with the initial tension position. S7. When the deformation amount deviation of the steel ring exceeds the deformation amount deviation threshold of the steel ring, the controller determines that the steel ring (18) of the cable-type bead is fatigued and fails.

10. The cable-type bead fatigue failure detection method according to claim 9, characterized in that, When the deformation amount deviation of the steel ring exceeds the deformation amount deviation threshold of the steel ring, the controller controls the cylinder (5) to stop inflating again.

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