Wire fatigue testing machine

Abstract

The application relates to a metal wire fatigue testing machine, which comprises a box body, an opening and closing door arranged on one side of the box body, a vertically arranged mounting plate connected in the box body, two turning wheels rotationally connected on the mounting plate, a swing wheel arranged on the mounting plate and a swing assembly for driving the swing wheel to move, the swing wheel being located between the two turning wheels, a lifting seat vertically and slidingly matched on the mounting plate, a plurality of weights placed on the lifting seat, a metal wire arranged between the swing wheel and the two turning wheels, one end of the metal wire being detachably connected with the mounting plate, the other end of the metal wire being detachably connected with the lifting seat, and a detection piece arranged on the mounting plate and used for detecting the breakage of the metal wire. The application has the effect of improving the fatigue test efficiency of the fatigue testing machine.

Description

Technical Field

[0001] This application relates to the field of metal wire fatigue testing technology, and in particular to a metal wire fatigue testing machine. Background Technology

[0002] A fatigue testing machine is a machine primarily used to determine the fatigue properties of metals and their alloys under tensile, compressive, or alternating tensile and compressive loads at room temperature. This equipment is widely used in materials science, machinery manufacturing, aerospace, and the automotive industry, and is of great significance for evaluating the durability and reliability of materials and for product quality control.

[0003] Chinese Patent CN202757850U ​​discloses a miniature wire rope fatigue testing machine, which includes a frame. A drive motor is mounted on the frame and is communicatively connected to an electronic controller. The power output of the drive motor is connected to a drive wheel. A drum is mounted on the frame above the drive wheel and is connected to the drive wheel via a transmission assembly. Simulated traction components, consisting of upper and lower guide wheels and a load wheel, are arranged on both sides of the drum on the frame. The load wheel is connected to a loading device. Two sets of rope end locking components are symmetrically arranged on the drum with the center as the center point. One end of the wire rope sample is connected to the drum through one set of rope end locking components, and the other end passes around the upper guide wheel, the load wheel, and the lower guide wheel and is connected to the drum through the other set of rope end locking components. This fatigue testing machine not only has a small footprint and is easy to promote, but also has high testing efficiency and high reliability of test data.

[0004] Regarding the aforementioned technologies, existing technologies rely on the cooperation of a drive motor and a drive wheel linkage to drive the drum to reciprocate. With the cooperation of a load wheel and a counterweight, the wire rope is driven to move back and forth under load. At the same time, a counter is used to calculate the number of rotations of the drive wheel to calculate the fatigue data of the wire rope. However, the weight of the counterweight and the load wheel in existing technologies is fixed. Under this condition, a relatively long period of load tension is required for the wire to break due to fatigue. This results in a long experimental time and reduces the fatigue testing efficiency of the fatigue testing machine. Summary of the Invention

[0005] In order to improve the fatigue testing efficiency of fatigue testing machines, this application provides a metal wire fatigue testing machine.

[0006] The technical solution for the metal wire fatigue testing machine provided in this application is as follows:

[0007] A metal wire fatigue testing machine includes a housing with an opening and closing door on one side. A vertically mounted mounting plate is connected inside the housing. Two steering wheels are rotatably connected to the mounting plate. A swing wheel and a swing assembly for driving the swing wheel are mounted on the mounting plate. The swing wheel is located between the two steering wheels. A lifting seat is vertically slidably fitted on the mounting plate. Several weights are placed on the lifting seat. A metal wire is wound between the swing wheel and the two steering wheels. One end of the metal wire is detachably connected to the mounting plate, and the other end is detachably connected to the lifting seat. A detection element for detecting metal wire breakage is mounted on the mounting plate.

[0008] By adopting the above technical solution, during testing, the swing assembly causes the swing wheel to swing back and forth, thereby applying pressure to the metal wire. The metal wire moves, pulling the lifting seat to move. During this process, weights are continuously added to the lifting seat at intervals. The metal wire is stretched under the load until it breaks. At this point, the detection element detects the wire breakage and sends feedback to the internal control system of the testing machine. The swing assembly then stops working. By counting the weights, the fatigue data of the metal wire is measured. By continuously adding weights at intervals to increase the load on the metal wire until it breaks, the maximum load on the metal wire can be measured to obtain the maximum fatigue value. Compared with existing technologies, this shortens the fatigue testing time of the metal wire and improves the fatigue testing efficiency of the fatigue testing machine.

[0009] Optionally, the swing assembly includes a drive motor, a drive disc, a drive rod, and a swing rod. The drive motor is mounted on the side wall of the mounting plate away from the opening and closing door. The drive disc is connected to the output shaft of the drive motor. One end of the swing rod is rotatably connected to the mounting plate, and the other end is connected to an extension column. The mounting plate has a clearance groove, through which the extension column passes. The swing wheel is mounted at the end of the extension column. One end of the drive rod is eccentrically rotatably connected to the drive disc, and the other end is rotatably connected to the swing rod.

[0010] By adopting the above technical solution, when swinging, the drive motor is started to make the drive disc rotate, thereby driving the drive rod to move, making the swing rod swing, and achieving the effect of driving the swing wheel to swing.

[0011] Optionally, the mounting plate is provided with a first connecting assembly, which includes a first rotating wheel, a rotating ring, a baffle, a limiting block, and a moving rod. The first rotating wheel is rotatably connected to the mounting plate and has a moving hole. The limiting block is connected to the opening of the moving hole, and the moving rod is slidably fitted inside the moving hole. The moving rod has a limiting groove and a first mounting hole, and the limiting block is slidably fitted to the limiting groove. The rotating ring is rotatably connected to the first rotating wheel and threadedly fitted to the moving rod. The baffle is an L-plate and is connected to the first rotating wheel. The moving rod passes through the baffle, and one end of a metal wire passes through the first mounting hole.

[0012] By adopting the above technical solution, during installation, one end of the metal wire is passed through the first mounting hole, and then the rotating ring is rotated. Through the cooperation of the limiting block and the limiting groove, and the cooperation of the rotating ring and the moving rod, the moving rod is moved, which drives one end of the metal wire to move until the metal wire is pressed against the baffle, thereby restricting the degree of freedom of one end of the metal wire and realizing the installation of one end of the metal wire.

[0013] Optionally, the lifting base is provided with a second connecting assembly, which includes a second rotating wheel, a locking bolt, and a pressure block. The second rotating wheel is rotatably connected to the lifting base. The second rotating wheel has a locking groove and a second mounting hole. The other end of the metal wire passes through the second mounting hole. A fixing block is connected to the opening of the locking groove. The locking bolt passes through the fixing block and is threadedly engaged with the fixing block. The pressure block is disposed in the locking groove and is rotatably connected to the locking bolt. The pressure block presses the metal wire.

[0014] By adopting the above technical solution, when installing the other end of the metal wire, the other end of the metal wire is passed through the second mounting hole, and then the locking bolt is rotated to move the pressure block until the pressure block presses the other end of the metal wire, thus realizing the installation of the other end of the metal wire.

[0015] Optionally, a guide rail is vertically connected to the mounting plate. The guide rail is a T-shaped rail, and the lifting seat is slidably fitted on the guide rail.

[0016] By adopting the above technical solution, the guide rail restricts the movement direction of the lifting platform and improves its movement stability.

[0017] Optionally, a connecting block is connected to the mounting plate at a position corresponding to the lower part of the guide rail, and a rubber block is connected to the connecting block.

[0018] By adopting the above technical solution, when the metal wire breaks, the lifting platform descends rapidly under the influence of the weight's gravity, and the weight is easily damaged upon hitting the ground. By setting up rubber blocks, the descent of the lifting platform is limited on the one hand, and the impact is cushioned by the rubber blocks, reducing the possibility of damage to the weight.

[0019] Optionally, an extension rod is connected to the lifting seat, and a placement plate and a retaining ring are connected to the bottom end of the extension rod. The placement plate is located above the retaining ring. A support spring is sleeved on the extension rod, and the support spring is located between the placement plate and the retaining ring. A placement notch is provided on the weight, and the weight is stacked on the placement plate. The extension rod is located within the placement notch.

[0020] By adopting the above technical solution, the stacking of weights inevitably subjectes the initial weight to a sudden impact force. This sudden impact force on the metal wire exacerbates fatigue and reduces the accuracy of the wire fatigue test. By incorporating support springs and a placement plate, the support springs buffer subsequent weight stacks during accumulation, minimizing the impact of the sudden impact force on the metal wire. Furthermore, the weights are handled gently during placement, improving the accuracy of the wire fatigue test.

[0021] Optionally, a support rod is detachably connected to the mounting plate. The support rod is located on the moving path of the lifting seat and above the rubber block. During installation, the lifting seat is placed on the support rod. During testing, the support rod is removed.

[0022] By adopting the above technical solution, the length of the metal wire needs to be limited before testing to ensure that the lifting seat will not touch the rubber block or detach from the guide rail. Therefore, the lifting seat needs to be raised for the installation of the other end of the metal wire, and a means to maintain the height of the lifting seat needs to be set up during installation. By setting up a support rod, the lifting seat can be placed on the support rod when installing the metal wire, which facilitates the installation of the metal wire; during the experiment, the support rod is removed to avoid hindering the movement of the lifting seat.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. During testing, the swing assembly causes the swing wheel to oscillate reciprocally, applying pressure to the metal wire. The moving wire pulls the lifting seat, and weights are continuously added to the lifting seat at intervals. The metal wire stretches under the load until it breaks. At this point, the detection element detects the wire breakage and sends feedback to the internal control system of the testing machine. The swing assembly then stops operating. By counting the weights, the fatigue data of the metal wire is measured. By continuously adding weights at intervals to increase the load on the metal wire until it breaks, the maximum load on the wire can be measured to obtain the maximum fatigue value. Compared to existing technologies, this shortens the fatigue testing time and improves the fatigue testing efficiency of the fatigue testing machine.

[0025] 2. During installation, one end of the metal wire is passed through the first mounting hole. Then, the rotating ring is rotated. Through the cooperation of the limiting block and the limiting groove, and the cooperation of the rotating ring and the moving rod, the moving rod is moved, which drives one end of the metal wire to move until the metal wire is pressed against the baffle. This restricts the degree of freedom of one end of the metal wire, thus realizing the installation of one end of the metal wire. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the metal wire fatigue testing machine in the embodiments of this application.

[0027] Figure 2 This is a schematic diagram of the internal structure of the metal wire fatigue testing machine in the embodiments of this application.

[0028] Figure 3 This is a schematic diagram of the structure of the steering wheel, swing wheel and lifting seat in the embodiments of this application.

[0029] Figure 4 This is a schematic diagram of the structure of the swing component in the embodiments of this application.

[0030] Figure 5 This is an exploded view used in the embodiments of this application to illustrate the structure of the first connecting component.

[0031] Figure 6 This is a cross-sectional view used to illustrate the structure of the first connecting component in the embodiments of this application.

[0032] Figure 7 This is an exploded view used in the embodiments of this application to illustrate the structure of the second connecting component.

[0033] Figure 8 This is a cross-sectional view used to illustrate the structure of the second connecting component in the embodiments of this application.

[0034] Figure 9 This is a schematic diagram of the structure of the weights, the placement plate, and the supporting spring in the embodiments of this application.

[0035] Explanation of reference numerals in the attached drawings: 1. Box body; 11. Mounting plate; 111. Clearance groove; 112. Guide rail; 113. Support rod; 114. Rubber block; 12. Steering wheel; 13. Swing wheel; 2. Swing assembly; 21. Drive motor; 22. Drive disc; 23. Drive rod; 24. Swing rod; 3. Detection component; 31. Detection copper rod; 4. First connecting assembly; 41. First rotating wheel; 42. Rotating ring; 43. Baffle; 44. Limiting block; 45. Moving rod; 451. Limiting groove; 452. First mounting hole; 5. Lifting seat; 51. Extension rod; 52. Placement plate; 53. Retaining ring; 54. Support spring; 55. Weight; 6. Second connecting assembly; 61. Second rotating wheel; 611. Second mounting hole; 62. Locking bolt; 63. Pressure block. Detailed Implementation

[0036] The following is in conjunction with the appendix Figures 1-9 This application will be described in further detail.

[0037] This application discloses a metal wire fatigue testing machine. (Refer to...) Figure 1 and Figure 2 The metal wire fatigue testing machine includes a housing 1, with an opening and closing door on one side. A mounting plate 11 is vertically fixed inside the housing 1. Two steering wheels 12 are rotatably connected to the side wall of the mounting plate 11 near the opening and closing door. The two steering wheels 12 are vertically distributed, and a clearance groove 111 is opened on the mounting plate 11 at the position corresponding to the position between the two steering wheels 12.

[0038] Reference Figure 3 and Figure 4 A swing wheel 13 is disposed between the two steering wheels 12. A swing assembly 2 is disposed on the mounting plate 11. The swing assembly 2 includes a drive motor 21, a drive disc 22, a drive rod 23, and a swing rod 24. The drive motor 21 is mounted on the side wall of the mounting plate 11 away from the steering wheels 12. The drive disc 22 is fixedly connected to the output shaft of the drive motor 21 and is coaxial with the output shaft. One end of the swing rod 24 is rotatably connected to the mounting plate 11, and the other end is fixedly connected to an extension column. The extension column passes through the clearance groove 111, and the swing wheel 13 is rotatably connected to the end of the extension column. One end of the drive rod 23 is eccentrically hinged to the drive disc 22, and the other end is hinged to the swing rod 24.

[0039] When the swing wheel 13 swings, the drive motor 21 is started, which makes the drive disc 22 rotate, the drive rod 23 move, and the swing rod 24 swings back and forth, so as to achieve the effect of the swing wheel 13 swinging back and forth.

[0040] Reference Figure 3 and Figure 4A detection element 3 is installed on the side wall of the mounting plate 11 away from the steering wheel 12. The detection element 3 is an inductive proximity sensor. A detection copper rod 31 is fixedly connected to the detection end of the detection element 3. The detection copper rod 31 passes through the mounting plate 11 and is located above the steering wheel 12. During detection, the detection copper rod 31 is energized, and the metal wire carries a partial current. The change in current on the detection copper rod 31 causes the detection metal wire to break.

[0041] Reference Figure 3 , Figure 5 and Figure 6 A first connecting assembly 4 is provided on the mounting plate 11. The first connecting assembly 4 includes a first rotating wheel 41, a rotating ring 42, a baffle 43, a limiting block 44, and a moving rod 45. The first rotating wheel 41 is rotatably connected to the mounting plate 11. The surface of the first rotating wheel 41 is provided with a mounting plane, and a moving hole is opened on the mounting plane. The limiting block 44 is fixedly connected to the inner wall of the moving hole. The moving rod 45 has a limiting groove 451 and a first mounting hole 452. The moving rod 45 passes through the moving hole, and the limiting block 44 is slidably engaged with the limiting groove 451. The rotating ring 42 is rotatably connected to the mounting plane and is threadedly engaged with the moving rod 45. The baffle 43 is an L-plate. One end of the baffle 43 is fixedly connected to the first rotating wheel 41, and the moving rod 45 passes through the other end of the baffle 43.

[0042] When installing one end of the metal wire, the metal wire is wound around the detection copper rod 31, the steering wheel 12 and the swing wheel 13. Then, one end passes through the first mounting hole 452, and the rotating ring 42 is turned. Through the cooperation of the limiting block 44 and the limiting groove 451, and the cooperation of the rotating ring 42 and the moving rod 45, the moving rod 45 moves into the moving block, driving one end of the metal wire to move until one end of the metal wire presses against the baffle 43, thus realizing the installation of one end of the metal wire.

[0043] Reference Figure 3 , Figure 7 and Figure 8 A guide rail 112, a T-shaped rail, is bolted to the mounting plate 11 and is vertically oriented. A lifting seat 5 is slidably fitted onto the guide rail 112. A second connecting assembly 6 is mounted on the lifting seat 5, comprising a second rotating wheel 61, a locking bolt 62, and a pressure block 63. The second rotating wheel 61 is rotatably connected to the lifting seat 5 and has a locking groove and a second mounting hole 611. A fixing block is fixedly connected to the opening of the locking groove, and the locking bolt 62 is threaded onto the fixing block. The pressure block 63 is located within the locking groove and rotatably connected to the locking bolt 62. The other end of a metal wire passes through the second mounting hole 611, and the pressure block 63 presses down on the other end of the metal wire.

[0044] When installing the other end of the metal wire, pass the other end of the metal wire through the second mounting hole 611, rotate the locking bolt 62 to move the pressure block 63 until the pressure block 63 presses the other end of the metal wire, thus realizing the installation of the other end of the metal wire.

[0045] Reference Figure 3 and Figure 9 An extension rod 51 is provided on the lifting base 5. The top end of the extension rod 51 is threaded into the lifting base 5, and the bottom end is threaded into a retaining ring 53. A placement plate 52 and a support spring 54 are sleeved on the extension rod 51. A rubber pad is fixedly connected to the placement plate 52, and the support spring 54 is located between the placement plate 52 and the retaining ring 53. Several weights 55 are stacked on the placement plate 52. The weights 55 have mounting notches, and the extension rod 51 is located within the mounting notches. The cooperation between the placement plate 52 and the support spring 54 is used to buffer the instantaneous impact force when the weights 55 are stacked, minimizing the impact on the metal wire.

[0046] Reference Figure 3 To facilitate the installation of the metal wire, a support rod 113 is threaded horizontally onto the mounting plate 11. The support rod 113 is located on one side of the guide rail 112 and on the moving path of the lifting seat 5. During installation, the lifting seat 5 is placed on the support rod 113; during testing, the support rod 113 is removed.

[0047] Reference Figure 3 To reduce the possibility of damage to the weight 55, a connecting block is bolted to the mounting plate 11 at a position directly below the guide rail 112. A rubber block 114 is fixedly connected to the connecting block, and the rubber block 114 is located below the support rod 113. The connection block and the rubber block 114 work together to support the lifting seat 5, and the rubber block 114 is used to buffer the impact of the lifting seat 5.

[0048] The implementation principle of a metal wire fatigue testing machine according to an embodiment of this application is as follows: During installation, one end of the metal wire is inserted into the first mounting hole 452, the rotating ring 42 is turned, and the moving rod 45 moves until the metal wire presses against the baffle 43. Then, the metal wire is wound around the detection copper rod 31, the upper steering wheel 12, the swing wheel 13 and the lower steering wheel 12 in sequence. Then, the lifting seat 5 is raised, and the support rod 113 is threaded onto the mounting plate 11. The lifting seat 5 is placed on the support rod 113, and the other end of the metal wire is passed through the second mounting hole 611. The locking bolt 62 is rotated, and the pressure block 63 moves until the other end of the metal wire is pressed to install the metal wire.

[0049] During the test, the support rod 113 is removed, the drive motor 21 is started, the drive disk 22 rotates, causing the drive rod 23 to move, which in turn causes the swing rod 24 to swing, making the swing wheel 13 swing back and forth. During this process, weights 55 are stacked on the placement plate 52 at intervals until the metal wire breaks. At this time, the detection element 3 detects the metal wire breakage and sends an electrical signal to the internal control system of the testing machine. The drive motor 21 stops working. At this time, the weights 55 are calculated to realize the fatigue value of the metal wire.

[0050] By continuously adding weight 55 during the interval, the load on the metal wire is increased until the metal wire breaks. The maximum load on the metal wire can be measured to obtain the maximum fatigue value. Compared with the existing technology, this shortens the fatigue test time of the metal wire and improves the fatigue test efficiency of the fatigue testing machine.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A metal wire fatigue testing machine, characterized in that: The device includes a housing (1), with an opening and closing door on one side. A vertically mounted mounting plate (11) is connected inside the housing (1). Two steering wheels (12) are rotatably connected to the mounting plate (11). A swing wheel (13) and a swing assembly (2) for driving the swing wheel (13) are provided on the mounting plate (11). The swing wheel (13) is located between the two steering wheels (12). A lifting seat (5) is vertically slidably fitted on the mounting plate (11). Several weights (55) are placed on the lifting seat (5). A metal wire is wound between the swing wheel (13) and the two steering wheels (12). One end of the metal wire is detachably connected to the mounting plate (11), and the other end is detachably connected to the lifting seat (5). A detection element (3) for detecting the breakage of the metal wire is installed on the mounting plate (11).

2. The metal wire fatigue testing machine according to claim 1, characterized in that: The swing assembly (2) includes a drive motor (21), a drive disc (22), a drive rod (23), and a swing rod (24). The drive motor (21) is mounted on the side wall of the mounting plate (11) away from the opening and closing door. The drive disc (22) is connected to the output shaft of the drive motor (21). One end of the swing rod (24) is rotatably connected to the mounting plate (11), and the other end is connected to an extension column. The mounting plate (11) has a clearance groove (111), and the extension column passes through the clearance groove (111). The swing wheel (13) is mounted on the end of the extension column. One end of the drive rod (23) is eccentrically rotatably connected to the drive disc (22), and the other end is rotatably connected to the swing rod (24).

3. The metal wire fatigue testing machine according to claim 1, characterized in that: The mounting plate (11) is provided with a first connecting assembly (4), which includes a first rotating wheel (41), a rotating ring (42), a baffle (43), a limiting block (44), and a moving rod (45). The first rotating wheel (41) is rotatably connected to the mounting plate (11), and a moving hole is opened on the first rotating wheel (41). The limiting block (44) is connected to the opening of the moving hole, and the moving rod (45) is slidably fitted in the moving hole. (45) has a limiting groove (451) and a first mounting hole (452). The limiting block (44) is slidably engaged with the limiting groove (451). The rotating ring (42) is rotatably connected to the first rotating wheel (41) and threadedly engaged with the moving rod (45). The baffle (43) is an L-plate. The baffle (43) is connected to the first rotating wheel (41). The moving rod (45) passes through the baffle (43). One end of the metal wire passes through the first mounting hole (452).

4. The metal wire fatigue testing machine according to claim 1, characterized in that: The lifting seat (5) is provided with a second connecting component (6), which includes a second rotating wheel (61), a locking bolt (62), and a pressure block (63). The second rotating wheel (61) is rotatably connected to the lifting seat (5). The second rotating wheel (61) has a locking groove and a second mounting hole (611). The other end of the metal wire passes through the second mounting hole (611). A fixing block is connected to the opening of the locking groove. The locking bolt (62) passes through the fixing block and is threadedly engaged with the fixing block. The pressure block (63) is located in the locking groove and is rotatably connected to the locking bolt (62). The pressure block (63) presses the metal wire.

5. The metal wire fatigue testing machine according to claim 1, characterized in that: The mounting plate (11) is vertically connected to a guide rail (112), which is a T-shaped rail, and the lifting seat (5) is slidably fitted on the guide rail (112).

6. The metal wire fatigue testing machine according to claim 5, characterized in that: A connecting block is connected to the mounting plate (11) at a position corresponding to the lower part of the guide rail (112), and a rubber block (114) is connected to the connecting block.

7. The metal wire fatigue testing machine according to claim 1, characterized in that: An extension rod (51) is connected to the lifting seat (5). The bottom end of the extension rod (51) is connected to a placement plate (52) and a retaining ring (53). The placement plate (52) is located above the retaining ring (53). A support spring (54) is sleeved on the extension rod (51). The support spring (54) is located between the placement plate (52) and the retaining ring (53). A placement notch is provided on the weight (55). The weight (55) is stacked on the placement plate (52). The extension rod (51) is located in the placement notch.

8. The metal wire fatigue testing machine according to claim 6, characterized in that: A support rod (113) is detachably connected to the mounting plate (11). The support rod (113) is located on the moving path of the lifting seat (5) and above the rubber block (114). During installation, the lifting seat (5) is placed on the support rod (113). During the experiment, the support rod (113) is removed.

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