Intersection node multi-axis fatigue testing machine and use method thereof

Abstract

The invention relates to the technical field of steel structure testing, and discloses an intersecting node multi-axis fatigue testing machine and a method for using the same, comprising a workbench, wherein two ends of the top of the workbench are respectively fixedly connected with support frames, a disc is fixedly connected between the two support frames, and also comprising a rotating test mechanism, wherein the rotating test mechanism comprises a circular shell fixedly connected to one side of the disc, and limiting holes are respectively provided on both sides of the circular shell, a workpiece is placed on the side wall of the disc, a motor is started, the motor drives a rotating shaft to rotate, the rotating shaft drives a transmission to rotate, the transmission drives a diamond disk to rotate, the diamond disk drives a bent bar to rotate, and limited by a slot hole, the bent bar drives a rotating block to move at the inner wall of the slot hole, the rotating block drives an arc shell to move, the arc shell drives a clamping block to move, and the two clamping blocks approach each other, thereby clamping the workpiece to prevent the workpiece from being separated and affecting the fatigue test of the workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure testing, in particular to an intersecting node multi-axial fatigue testing machine and a use method thereof. Background Art

[0002] Fatigue testing machine is a machine mainly used to test the fatigue performance of metal and its alloy materials under tension, compression or tension and compression alternating load at room temperature. When using the existing fatigue testing machine, the material is fixed between the clamps through the clamps, and it is stretched or compressed by the hydraulic cylinder.

[0003] However, the existing fatigue testing machine is a uniaxial testing machine, which can only perform fatigue loading in a single direction. In reality, the material may be subjected to forces at multiple angles and directions, not limited to one direction, which will affect the accuracy of the actual force and make the final result of the test differ greatly from the actual deviation value. Summary of the invention

[0004] The object of the present invention is to provide an intersecting node multi-axis fatigue testing machine and a method of using the same to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention relates to an intersecting node multi-axis fatigue testing machine and a method for using the same, comprising a workbench, wherein the top two ends of the workbench are respectively fixedly connected with support frames, a disc is fixedly connected between the two support frames, and a rotation test mechanism is also included, wherein the rotation test mechanism comprises a circular shell fixedly connected to one side of the disc, limiting holes are respectively provided on both sides of the circular shell, a motor is fixedly connected to the side of the circular shell away from the disc, a rotating shaft is fixedly connected to the output end of the motor, one end of the rotating shaft passes through the circular shell and extends to the outside of the disc, and a speed regulating component is provided on the outer wall of the rotating shaft.

[0007] Furthermore, the speed regulation assembly includes a transmission fixedly connected to the outer wall of the rotating shaft, and a diamond-shaped disk is sleeved and fixedly connected to the outer wall of the transmission, and bent bars are rotatably connected to the two ends of one side of the diamond-shaped disk, and a rotating block is rotatably connected to the side wall of the bent bar away from the diamond disk, and slots are respectively opened at the two ends of one side of the disk.

[0008] Furthermore, the outer wall of the rotating block is sleeved and slidably connected to the inner wall of the slot, the end of the rotating block away from the bending bar is fixedly connected to an arc shell, the inner wall of the arc shell is sleeved and slidably connected to a clamping block, one side of the clamping block is fixedly connected to a cross bar, one end of the cross bar passes through the arc shell and extends to the outside of the arc shell, and the side of the clamping block close to the cross bar is fixedly connected to a return spring.

[0009] Furthermore, one end of the return spring is fixedly connected to one side of the inner wall of the arc-shaped shell, one side of the disc contacts the workpiece, one end of the cross bar away from the clamping block is fixedly connected to the pressure plate, the outer wall of the pressure plate is sleeved and slidably connected to a connecting shell, one end of the connecting shell is fixedly connected to the side wall of the arc-shaped shell, and both sides of the connecting shell are respectively connected to elastic tubes.

[0010] Furthermore, shearing assemblies are provided at both ends of the arc shell, and the shearing assemblies include a bent pipe connected to the two ends of the arc shell, one end of the bent pipe is connected to the arc tube, one end of the arc tube is fixedly connected to one end of the arc shell, one side of the inner wall of the arc tube is fixedly connected to an elastic rope, and one end of the elastic rope is fixedly connected to a slider.

[0011] Furthermore, the outer wall of the slider is sleeved and slidably connected to the inner wall of the arc tube, the end of the slider away from the elastic rope is fixedly connected to the arc rod, the side of the arc rod away from the slider passes through and is rotatably connected to the rotating rod, the outer wall of the rotating rod is sleeved and fixedly connected to the special-shaped shell, the center of the inner wall of the special-shaped shell is fixedly connected to the special-shaped capsule, a number of extrusion plates are fixedly connected around the special-shaped capsule, the outer wall of the extrusion plate is sleeved and slidably connected to the inner wall of the special-shaped shell, and one end of the elastic tube is connected to the special-shaped capsule.

[0012] Furthermore, an impact assembly is provided on one side of the disc, and the impact assembly includes a round box fixedly connected to the disc and away from one side of the round shell, an end of the rotating shaft away from the motor is fixedly connected to a special-shaped plate, one end of the special-shaped plate passes through and is rotatably connected to four corner plates, one side of the four corner plates is rotatably connected to flexible strips, the outer wall of the round box is connected to a number of round tubes, the inner wall of the round tube is sleeved and slidably connected to an extrusion shell, and both sides of the inner wall of the extrusion shell are fixedly connected to fixing rods.

[0013] Furthermore, one end of the flexible strip away from the four corner plates is rotatably connected to the outer wall of the fixed rod, two ends of one side of the outer wall of the extrusion shell are respectively fixedly connected to rubber hemispheres, one side of the extrusion shell close to the rubber hemisphere is fixedly connected to a rubber rope, one end of the rubber rope away from the extrusion shell is fixedly connected to an impact plate, one end of the impact plate is rotatably connected to a concave block, one side of the concave block is fixedly connected to the outer wall of the round box, one side of the impact plate close to the rubber rope is fixedly connected to an arc spring, and one end of the arc spring is fixedly connected to one side of the outer wall of the round tube.

[0014] Furthermore, a stretching assembly is provided on one side of the four corner plates, and the stretching assembly includes a connecting bent rod rotatably connected to the side of the four corner plates away from the special-shaped plate, the outer wall of the connecting bent rod is sleeved and fixedly connected with a sleeve plate, the outer wall of the sleeve plate is sleeved and rotatably connected to the inner wall of the round box, the end of the connecting bent rod away from the four corner plates is fixedly connected to the irregular plate, one side of the connecting bent rod is fixedly connected to an oblique rod, the side wall of the end of the oblique rod away from the connecting bent rod is fixedly connected to a flexible rope, the end of the flexible rope away from the oblique rod is fixedly connected to a lifting plate, the outer wall of the lifting plate is sleeved and fixedly connected with a square shell, one side of the square shell is fixedly connected to the side wall of the disc, and hook rods are respectively fixedly connected to the two sides of the bottom of the lifting plate.

[0015] A method for using a multi-axial fatigue testing machine with intersecting nodes, comprising the following steps:

[0016] Step 1: Place the workpiece on the side wall of the disc, start the motor, the motor drives the rotating shaft to rotate, the rotating shaft drives the transmission to rotate, the transmission drives the diamond disc to rotate, the diamond disc drives the bent bar to rotate, limited by the slot hole, the bent bar drives the rotating block to move at the inner wall of the slot hole, the rotating block drives the arc shell to move, the arc shell drives the clamping block to move, the two clamping blocks approach each other, when the clamping block clamps the workpiece, it is subjected to the reaction force of the workpiece, the clamping block moves toward the inside of the arc shell, the clamping block squeezes the lubricating oil inside the arc shell, the lubricating oil enters the inside of the arc tube through the bent pipe, the lubricating oil enters the inside of the arc tube and pushes the slider to move, the slider drives the arc rod to move, the arc rod drives the rotating rod to move, the rotating rod drives the special-shaped shell to move, and the special-shaped shell drives the extrusion plate to move;

[0017] Step 2: When one of the extrusion plates is subjected to a shear test with the surface of the workpiece, the extrusion plate is subjected to a reaction force from the workpiece, so that the extrusion plate moves toward the inside of the special-shaped shell. During the movement of the extrusion plate, the special-shaped capsule is squeezed, and the special-shaped capsule is deformed by the extrusion. The other three corners of the special-shaped capsule expand and deform. The special-shaped capsule drives the extrusion plate to move. During the movement of the extrusion plate, the extrusion plate contacts the workpiece. During the reverse movement of the clamping block, the clamping block drives the cross bar to move in the reverse direction, and the cross bar drives the pressure plate to move. During the movement of the pressure plate, the airflow inside the connecting shell enters the inside of the special-shaped capsule through the elastic tube.

[0018] Step 3: When the rotating shaft rotates, the rotating shaft drives the special-shaped plate to rotate, the special-shaped plate drives the four-corner plate to rotate eccentrically, the four-corner plate drives the flexible strip to rotate, and when the flexible strip is driven by the four-corner plate, one of the flexible strips will drive the fixed rod to move outside the round tube, the fixed rod drives the extrusion shell to move outside the round tube, the extrusion shell drives the rubber hemisphere to move, and the inner wall of the workpiece is extruded, and the extrusion shell drives the rubber rope to move, so that the rubber rope is stretched, and the rubber rope drives the impact plate to move, and during the movement of the impact plate, one side of the workpiece can be knocked;

[0019] Step 4: After the impact plate strikes the workpiece, it is elastically deformed by the arc spring, causing the impact plate to reset. At the same time, the four-corner plates drive the connecting bent rods to rotate around the rotating axis. In the process of the connecting bent rods driving the irregular plates to rotate, the irregular plates are subjected to the irregular setting of the irregular plates, causing the irregular plates to squeeze the impact plate to different degrees. In the process of the rotation of the connecting bent rods, the inclined rods are driven to rotate, and the inclined rods drive the flexible ropes to rotate. The flexible ropes are stretched, causing the lifting plate to rise, and the lifting plate drives the hook rod to rise. During the rising process of the hook rod, the workpiece is hooked and stretched.

[0020] The present invention has the following beneficial effects:

[0021] (1) A multi-axis fatigue testing machine with intersecting nodes, wherein a workpiece is placed on the side wall of a disc, and a motor is started. The motor drives a rotating shaft to rotate, and the rotating shaft drives a transmission to rotate. The transmission drives a diamond disc to rotate, and the diamond disc drives a bent bar to rotate. The bent bar is limited by a slot hole, and drives a rotating block to move at the inner wall of the slot hole. The rotating block drives an arc shell to move, and the arc shell drives a clamping block to move. The two clamping blocks are close to each other, thereby clamping the workpiece to prevent the workpiece from being separated and affecting the fatigue test of the workpiece. When the clamping block clamps the workpiece, it is subjected to a reaction force from the workpiece, and the clamping block moves toward the inside of the arc shell. The clamping block squeezes the lubricating oil inside the arc shell, and the lubricating oil enters the inside of the arc tube through the bent pipe. After the lubricating oil enters the inside of the arc tube, it pushes the slider to move, and the slider drives the arc rod to move, and the arc rod drives the rotating rod to move, and the rotating rod drives the special-shaped shell to move, and the special-shaped shell drives the extrusion plate to move, thereby performing a shear stress test on the surface of the workpiece.

[0022] (2) A multi-axis fatigue testing machine with intersecting nodes, when one of the extrusion plates is performing a shear test on the surface of a workpiece, the extrusion plate is subjected to a reaction force from the workpiece, causing the extrusion plate to move toward the inside of the special-shaped shell. During the movement of the extrusion plate, the special-shaped capsule is squeezed, and the special-shaped capsule is deformed by the squeezing. The other three corners of the special-shaped capsule expand and deform. The special-shaped capsule drives the extrusion plate to move. During the movement of the extrusion plate, the extrusion plate will come into contact with the workpiece. The friction force generated by the two causes the next extrusion plate to perform a shear test on the workpiece, thereby being able to perform a shear test on different positions of the workpiece, and being able to use different forces for shearing during the shearing process, thereby enhancing the complex stress state under real working conditions. During the reverse movement of the clamping block, the clamping block drives the cross bar to move in the reverse direction, and the cross bar drives the pressure plate to move. During the movement of the pressure plate, the airflow inside the connecting shell enters the inside of the special-shaped capsule through the elastic tube, thereby increasing the expansion efficiency of the special-shaped capsule and enhancing the squeezing effect of the special-shaped capsule on the extrusion plate.

[0023] (3) A multi-axis fatigue testing machine with intersecting nodes, wherein when the rotating shaft rotates, the rotating shaft drives the special-shaped plate to rotate, the special-shaped plate drives the four-corner plate to rotate eccentrically, the four-corner plate drives the flexible strip to rotate, and when the flexible strip is driven by the four-corner plate, one of the flexible strips drives the fixed rod to move to the outside of the circular tube, the fixed rod drives the extrusion shell to move to the outside of the circular tube, the extrusion shell drives the rubber hemisphere to move, and squeezes the inner wall of the workpiece, thereby performing a stress test on the inner wall of the workpiece, and the extrusion shell drives the rubber rope to move, so that the rubber rope is stretched, and the rubber rope drives the impact plate to move, and during the movement of the impact plate, it can knock on one side of the workpiece, thereby enhancing the accuracy of the stress test of the workpiece.

[0024] (4) A multi-axis fatigue testing machine with intersecting nodes. When the impact plate strikes the workpiece, it is elastically deformed by the arc spring, causing the impact plate to reset. At the same time, the four-corner plates drive the connecting bent rods to rotate around the rotating axis. In the process of the connecting bent rods driving the irregular plates to rotate, the irregular plates are subjected to the irregular arrangement of the irregular plates, and the irregular plates squeeze the impact plate to different degrees, so that the impact plate strikes the workpiece to different degrees, further enhancing the complex stress state under real working conditions. In addition, during the rotation of the connecting bent rods, the inclined rods are driven to rotate, and the inclined rods drive the flexible ropes to rotate. The flexible ropes are stretched, causing the lifting plate to rise, and the lifting plate drives the hook rod to rise. During the rising process of the hook rod, the workpiece is hooked and stretched, thereby enabling multi-angle stress testing of the workpiece, thereby enhancing the authenticity of the test.

[0025] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the overall side structure of the present invention;

[0028] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the explosion structure of the speed regulating assembly of the present invention;

[0030] Figure 4 It is a schematic diagram of the partial front structure of the present invention;

[0031] Figure 5 It is a schematic diagram of a half-section top view of the speed regulating assembly of the present invention;

[0032] Figure 6 This is a schematic diagram of the exploded structure of the shear assembly of the present invention;

[0033] Figure 7 This is a schematic diagram of a half-section structure of a stretching assembly of the present invention;

[0034] Figure 8 This is a schematic diagram of the explosion structure of the impact assembly of the present invention;

[0035] Fig. 9 For the present invention Figure 7 A magnified view of middle;

[0036] Fig.10 It is a schematic diagram of the working process of the present invention.

[0037] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0038] In the figure: 1, workbench; 2, support frame; 3, disc; 4, rotating test mechanism; 41, round shell; 42, limit hole; 43, motor; 44, rotating shaft; 45, speed regulating assembly; 46, shearing assembly; 47, impact assembly; 48, stretching assembly; 451, transmission; 452, diamond disc; 453, bending bar; 454, rotating block; 455, slot; 456, arc shell; 457, clamping block; 458, cross bar; 459, return spring; 4510, workpiece; 4511, pressure plate; 4512, connecting shell; 4513, elastic tube; 461, bending tube; 462, arc tube; 463, Elastic rope; 464, slider; 465, arc rod; 466, rotating rod; 467, special-shaped shell; 468, special-shaped capsule; 469, extrusion plate; 471, round box; 472, special-shaped plate; 473, four-corner plate; 474, flexible strip; 475, round tube; 476, fixed rod; 477, extrusion shell; 478, rubber hemisphere; 479, rubber rope; 4710, impact plate; 4711, arc spring; 4712, concave block; 481, connecting bent rod; 482, sleeve plate; 483, irregular plate; 484, oblique rod; 485, flexible rope; 486, lifting plate; 487, square shell; 488, hook rod. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1, please refer to Figure 1-Figure 10 As shown, the present invention is an intersecting node multi-axial fatigue testing machine and a method of using the same, comprising a workbench 1, the top two ends of the workbench 1 are respectively fixedly connected with support frames 2, the purpose of such a setting is to support the operation of the device, a disc 3 is fixedly connected between the two support frames 2, and also includes;

[0041] The rotating test mechanism 4 includes a round shell 41 fixedly connected to one side of the disc 3, and limit holes 42 are respectively provided on both sides of the round shell 41. The purpose of this arrangement is to facilitate the movement of the bending bar 453. A motor 43 is fixedly connected to the side of the round shell 41 away from the disc 3, and a rotating shaft 44 is fixedly connected to the output end of the motor 43. One end of the rotating shaft 44 passes through the round shell 41 and extends to the outside of the disc 3. A speed regulating component 45 is provided on the outer wall of the rotating shaft 44.

[0042] The speed regulating assembly 45 includes a transmission 451 fixedly connected to the outer wall of the rotating shaft 44. The purpose of this arrangement is to reduce the rotation speed of the diamond disk 452. The outer wall of the transmission 451 is sleeved and fixedly connected with the diamond disk 452. The two ends of one side of the diamond disk 452 are respectively rotatably connected with bent bars 453. The side wall of the bent bar 453 at one end away from the diamond disk 452 is rotatably connected with a rotating block 454. Slots 455 are respectively provided at the two ends of one side of the disk 3.

[0043] The outer wall of the rotating block 454 is sleeved and slidably connected to the inner wall of the slot 455, and the end of the rotating block 454 away from the bent bar 453 is fixedly connected to the arc shell 456, and the inner wall of the arc shell 456 is sleeved and slidably connected to the clamping block 457, one side of the clamping block 457 is fixedly connected to the cross bar 458, one end of the cross bar 458 passes through the arc shell 456 and extends to the outside of the arc shell 456, and the side of the clamping block 457 close to the cross bar 458 is fixedly connected to the reset spring 459. The purpose of this arrangement is to facilitate reset.

[0044] One end of the return spring 459 is fixedly connected to one side of the inner wall of the arc-shaped shell 456, one side of the disk 3 contacts the workpiece 4510, one end of the cross bar 458 away from the clamping block 457 is fixedly connected to the pressure plate 4511, the outer wall of the pressure plate 4511 is sleeved and slidably connected with a connecting shell 4512, one end of the connecting shell 4512 is fixedly connected to the side wall of the arc-shaped shell 456, and both sides of the connecting shell 4512 are respectively connected to elastic tubes 4513. The purpose of this arrangement is to enable elastic stretching and extension.

[0045] A shearing assembly 46 is provided at both ends of the arc shell 456. The shearing assembly 46 includes a curved pipe 461 connected to the two ends of the arc shell 456. One end of the curved pipe 461 is connected to an arc tube 462. One end of the arc tube 462 is fixedly connected to one end of the arc shell 456. An elastic rope 463 is fixedly connected to one side of the inner wall of the arc tube 462. One end of the elastic rope 463 is fixedly connected to a slider 464.

[0046] The outer wall of the slider 464 is sleeved and slidably connected to the inner wall of the arc tube 462, the end of the slider 464 away from the elastic rope 463 is fixedly connected to the arc rod 465, the side of the arc rod 465 away from the slider 464 passes through and is rotatably connected to the rotating rod 466, the outer wall of the rotating rod 466 is sleeved and fixedly connected to the special-shaped shell 467, the center of the inner wall of the special-shaped shell 467 is fixedly connected to the special-shaped capsule 468, and a number of extrusion plates 469 are fixedly connected around the special-shaped capsule 468. The purpose of this arrangement is that one end of the extrusion plate 469 is arranged in a tooth shape to enhance the roughness of the extrusion plate 469, the outer wall of the extrusion plate 469 is sleeved and slidably connected to the inner wall of the special-shaped shell 467, and one end of the elastic tube 4513 is connected to the special-shaped capsule 468.

[0047] The workpiece 4510 is placed on the side wall of the disk 3, and the motor 43 is started. The motor 43 drives the rotating shaft 44 to rotate, and the rotating shaft 44 drives the transmission 451 to rotate. The transmission 451 drives the diamond disk 452 to rotate, and the diamond disk 452 drives the bending bar 453 to rotate. The bending bar 453 is limited by the slot 455, and the rotating block 454 moves on the inner wall of the slot 455. The rotating block 454 drives the arc shell 456 to move. The arc shell 456 drives the clamping block 457 to move. The two clamping blocks 457 are close to each other, so as to clamp the workpiece 4510 to prevent the workpiece 4510 from being separated and affecting the fatigue test of the workpiece 4510. During the test, when the clamping block 457 clamps the workpiece 4510, it is subjected to the reaction force of the workpiece 4510, and the clamping block 457 moves toward the inside of the arc shell 456. The clamping block 457 squeezes the lubricating oil inside the arc shell 456, and the lubricating oil enters the inside of the arc tube 462 through the bend 461. After the lubricating oil enters the inside of the arc tube 462, it pushes the slider 464 to move, and the slider 464 drives the arc rod 465 to move, and the arc rod 465 drives the rotating rod 466 to move, and the rotating rod 466 drives the special-shaped shell 467 to move, and the special-shaped shell 467 drives the extrusion plate 469 to move, thereby performing a shear stress test on the surface of the workpiece 4510.

[0048] When one of the extrusion plates 469 is performing a shear test on the surface of the workpiece 4510, the extrusion plate 469 is subjected to the reaction force of the workpiece 4510, so that the extrusion plate 469 moves toward the inside of the special-shaped shell 467. During the movement, the extrusion plate 469 squeezes the special-shaped capsule 468, and the special-shaped capsule 468 is deformed by the squeezing. The other three corners of the special-shaped capsule 468 expand and deform, and the special-shaped capsule 468 drives the extrusion plate 469 to move. During the movement, the extrusion plate 469 will come into contact with the workpiece 4510. The friction force generated by the two causes the next extrusion plate 469 to perform a shear test on the workpiece 4510. In this way, shear tests can be performed on different positions of the workpiece 4510, and different forces can be used for shearing during the shearing process, thereby enhancing the complex stress state under actual working conditions. In the process of reverse movement of the clamping block 457, the clamping block 457 drives the cross bar 458 to move in the reverse direction, and the cross bar 458 drives the pressure plate 4511 to move. During the movement of the pressure plate 4511, the air flow inside the connecting shell 4512 enters into the interior of the special-shaped bag 468 through the elastic tube 4513, thereby increasing the expansion efficiency of the special-shaped bag 468 and enhancing the extrusion effect of the special-shaped bag 468 on the extrusion plate 469.

[0049] In embodiment 2, an impact assembly 47 is provided on one side of the disc 3, and the impact assembly 47 includes a round box 471 fixedly connected to the disc 3 and away from the side of the round shell 41, and the end of the rotating shaft 44 away from the motor 43 is fixedly connected to a special-shaped plate 472. The purpose of this arrangement is to be able to generate eccentric rotation, and one side end of the special-shaped plate 472 passes through and is rotatably connected to a four-corner plate 473, and one side of the four-corner plate 473 is rotatably connected to flexible strips 474 respectively. The outer wall of the round box 471 is connected to a plurality of round tubes 475 respectively, and the inner wall of the round tube 475 is sleeved and slidably connected to an extrusion shell 477, and both sides of the inner wall of the extrusion shell 477 are fixedly connected to fixing rods 476.

[0050] One end of the flexible strip 474 away from the four-corner plate 473 is rotatably connected to the outer wall of the fixed rod 476, and the two ends of one side of the outer wall of the extrusion shell 477 are respectively fixedly connected to rubber hemispheres 478, the purpose of this arrangement is to prevent damage to the workpiece 4510 during the extrusion process, and the side of the extrusion shell 477 close to the rubber hemisphere 478 is fixedly connected to a rubber rope 479, the purpose of this arrangement is to have elastic deformation, the end of the rubber rope 479 away from the extrusion shell 477 is fixedly connected to the impact plate 4710, one end of the impact plate 4710 is rotatably connected to a concave block 4712, one side of the concave block 4712 is fixedly connected to the outer wall of the round box 471, and the side of the impact plate 4710 close to the rubber rope 479 is fixedly connected to an arc spring 4711, and one end of the arc spring 4711 is fixedly connected to one side of the outer wall of the round tube 475.

[0051] A stretching assembly 48 is provided on one side of the four-corner plate 473. The stretching assembly 48 includes a connecting bent rod 481 rotatably connected to the side of the four-corner plate 473 away from the special-shaped plate 472. The outer wall of the connecting bent rod 481 is sleeved and fixedly connected with a sleeve plate 482. The purpose of this arrangement is to prevent the connecting bent rod 481 from rotating. The outer wall of the sleeve plate 482 is sleeved and rotatably connected to the inner wall of the round box 471. The end of the connecting bent rod 481 away from the four-corner plate 473 is fixedly connected with an irregular plate 483. One side of 481 is fixedly connected with an inclined rod 484, and the side wall of the inclined rod 484 at one end away from the connected curved rod 481 is fixedly connected with a flexible rope 485, and the end of the flexible rope 485 away from the inclined rod 484 is fixedly connected with a lifting plate 486, and the outer wall of the lifting plate 486 is sleeved and fixedly connected with a square shell 487, and one side of the square shell 487 is fixedly connected to the side wall of the disc 3, and the bottom sides of the lifting plate 486 are respectively fixedly connected with hook rods 488. The purpose of this arrangement is to hook the workpiece 4510.

[0052] A method for using an intersecting node multi-axial fatigue testing machine comprises the following steps:

[0053] Step 1: Place the workpiece 4510 on the side wall of the disc 3, start the motor 43, the motor 43 drives the rotating shaft 44 to rotate, the rotating shaft 44 drives the transmission 451 to rotate, the transmission 451 drives the rhombus disc 452 to rotate, the rhombus disc 452 drives the bending bar 453 to rotate, and the bending bar 453 drives the rotating block 454 to move on the inner wall of the slot 455 due to the limitation of the slot 455, the rotating block 454 drives the arc shell 456 to move, the arc shell 456 drives the clamping block 457 to move, and the two clamping blocks 457 are close to each other. When the clamping block 45 When the workpiece 4510 is clamped, the clamping block 457 is subjected to the reaction force of the workpiece 4510, and moves toward the inside of the arc shell 456. The clamping block 457 squeezes the lubricating oil inside the arc shell 456, and the lubricating oil enters the inside of the arc tube 462 through the bend 461. After the lubricating oil enters the inside of the arc tube 462, it pushes the slider 464 to move, and the slider 464 drives the arc rod 465 to move, and the arc rod 465 drives the rotating rod 466 to move, and the rotating rod 466 drives the special-shaped shell 467 to move, and the special-shaped shell 467 drives the extrusion plate 469 to move;

[0054] Step 2: When one of the extrusion plates 469 is subjected to a shear test on the surface of the workpiece 4510, the extrusion plate 469 is subjected to a reaction force from the workpiece 4510, so that the extrusion plate 469 moves toward the inside of the special-shaped shell 467. During the movement of the extrusion plate 469, the special-shaped capsule 468 is squeezed, and the special-shaped capsule 468 is deformed by the extrusion. The other three corners of the special-shaped capsule 468 expand and deform. The special-shaped capsule 468 drives the extrusion plate 469 to move. During the movement of the extrusion plate 469, the extrusion plate 469 contacts the workpiece 4510. During the reverse movement of the clamping block 457, the clamping block 457 drives the cross bar 458 to move in the reverse direction. The cross bar 458 drives the pressure plate 4511 to move. During the movement of the pressure plate 4511, the airflow inside the connecting shell 4512 enters the inside of the special-shaped capsule 468 through the elastic tube 4513.

[0055] Step 3: When the rotating shaft 44 rotates, the rotating shaft 44 drives the special-shaped plate 472 to rotate, the special-shaped plate 472 drives the four-corner plate 473 to rotate eccentrically, and the four-corner plate 473 drives the flexible strip 474 to rotate. When the flexible strip 474 is driven by the four-corner plate 473, one of the flexible strips 474 will drive the fixed rod 476 to move to the outside of the circular tube 475, and the fixed rod 476 drives the extrusion shell 477 to move to the outside of the circular tube 475. The extrusion shell 477 drives the rubber hemisphere 478 to move to squeeze the inner wall of the workpiece 4510, and the extrusion shell 477 drives the rubber rope 479 to move, so that the rubber rope 479 is stretched, and the rubber rope 479 drives the impact plate 4710 to move. During the movement of the impact plate 4710, it can knock on one side of the workpiece 4510;

[0056] Step 4: After the impact plate 4710 strikes the workpiece 4510, it is elastically deformed by the arc spring 4711, causing the impact plate 4710 to reset. At the same time, the four-corner plate 473 drives the connecting bent rod 481 to rotate around the rotating shaft 44. During the process of the connecting bent rod 481 driving the irregular plate 483 to rotate, the irregular plate 483 is subjected to the irregular setting of the irregular plate 483, and the irregular plate 483 squeezes the impact plate 4710 to different degrees. During the rotation of the connecting bent rod 481, the inclined rod 484 is driven to rotate, and the inclined rod 484 drives the flexible rope 485 to rotate. The flexible rope 485 is stretched, causing the lifting plate 486 to rise, and the lifting plate 486 drives the hook rod 488 to rise. During the rising process of the hook rod 488, the workpiece 4510 is hooked and stretched.

[0057] When in use, when the rotating shaft 44 rotates, the rotating shaft 44 drives the special-shaped plate 472 to rotate, the special-shaped plate 472 drives the four corner plates 473 to rotate eccentrically, and the four corner plates 473 drive the flexible strips 474 to rotate. During the process of the flexible strips 474 being driven by the four corner plates 473, one of the flexible strips 474 will drive the fixed rod 476 to move toward the outside of the circular tube 475, the fixed rod 476 drives the extrusion shell 477 to move toward the outside of the circular tube 475, the extrusion shell 477 drives the rubber hemisphere 478 to move, and squeezes the inner wall of the workpiece 4510, thereby performing a stress test on the inner wall of the workpiece 4510, and the extrusion shell 477 drives the rubber rope 479 to move, so that the rubber rope 479 is stretched, and the rubber rope 479 drives the impact plate 4710 to move. During the movement of the impact plate 4710, it can knock on one side of the workpiece 4510, thereby enhancing the stress test accuracy of the workpiece 4510.

[0058] After the impact plate 4710 strikes the workpiece 4510, it is elastically deformed by the arc spring 4711, causing the impact plate 4710 to reset. At the same time, the four-corner plate 473 drives the connecting bent rod 481 to rotate around the rotating shaft 44. In the process of the connecting bent rod 481 driving the irregular plate 483 to rotate, the irregular plate 483 is irregularly set, and the irregular plate 483 squeezes the impact plate 4710 to different degrees, so that the impact plate 4710 strikes the workpiece 4510 to different degrees, further enhancing the complex stress state under real working conditions. In the process of the rotation of the connecting bent rod 481, the inclined rod 484 is driven to rotate, and the inclined rod 484 drives the flexible rope 485 to rotate. The flexible rope 485 is stretched, causing the lifting plate 486 to rise, and the lifting plate 486 drives the hook rod 488 to rise. During the rising process of the hook rod 488, the workpiece 4510 is hooked and stretched, thereby enabling multi-angle stress testing of the workpiece 4510 to enhance the authenticity of the test.

[0059] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An intersecting node multi-axial fatigue testing machine, characterized in that: It comprises a workbench (1), wherein two ends of the top of the workbench (1) are respectively fixedly connected to support frames (2), a disc (3) is fixedly connected between the two support frames (2), and further comprises: A rotation test mechanism (4), the rotation test mechanism (4) comprising a round shell (41) fixedly connected to one side of the disc (3), limiting holes (42) being respectively provided on both sides of the round shell (41), a motor (43) being fixedly connected to the side of the round shell (41) away from the disc (3), a rotating shaft (44) being fixedly connected to the output end of the motor (43), one end of the rotating shaft (44) passing through the round shell (41) and extending to the outside of the disc (3), and a speed regulating component (45) being provided on the outer wall of the rotating shaft (44); The speed regulating assembly (45) comprises a transmission (451) fixedly connected to the outer wall of the rotating shaft (44); a diamond-shaped disc (452) is sleeved and fixedly connected to the outer wall of the transmission (451); two ends of one side of the diamond-shaped disc (452) are rotatably connected to curved bars (453); a side wall of one end of the curved bar (453) away from the diamond-shaped disc (452) is rotatably connected to a rotating block (454); and two ends of one side of the disc (3) are respectively provided with slots (455); The outer wall of the rotating block (454) is sleeved and slidably connected to the inner wall of the slot (455); one end of the rotating block (454) away from the curved strip (453) is fixedly connected to an arc-shaped shell (456); the inner wall of the arc-shaped shell (456) is sleeved and slidably connected to a clamping block (457); one side of the clamping block (457) is fixedly connected to a cross bar (458); one end of the cross bar (458) passes through the arc-shaped shell (456) and extends to the outside of the arc-shaped shell (456); and a side of the clamping block (457) close to the cross bar (458) is fixedly connected to a return spring (459); One end of the return spring (459) is fixedly connected to one side of the inner wall of the arc-shaped shell (456); one side of the disc (3) contacts the workpiece (4510); one end of the cross bar (458) away from the clamping block (457) is fixedly connected to a pressure plate (4511); a connecting shell (4512) is sleeved on the outer wall of the pressure plate (4511) and slidably connected; one end of the connecting shell (4512) is fixedly connected to the side wall of the arc-shaped shell (456); and both sides of the connecting shell (4512) are respectively connected to elastic tubes (4513); Both ends of the arc-shaped shell (456) are provided with shearing assemblies (46), the shearing assemblies (46) comprising a curved pipe (461) connected to both ends of the arc-shaped shell (456), one end of the curved pipe (461) being connected to an arc-shaped pipe (462), one end of the arc-shaped pipe (462) being fixedly connected to one end of the arc-shaped shell (456), one side of the inner wall of the arc-shaped pipe (462) being fixedly connected to an elastic rope (463), one end of the elastic rope (463) being fixedly connected to a slider (464); The outer wall of the slider (464) is sleeved and slidably connected to the inner wall of the arc-shaped tube (462); one end of the slider (464) away from the elastic rope (463) is fixedly connected to an arc-shaped rod (465); a side of the arc-shaped rod (465) away from the slider (464) penetrates and is rotatably connected to a rotating rod (466); the outer wall of the rotating rod (466) is sleeved and fixedly connected to a special-shaped shell (467); a special-shaped capsule (468) is fixedly connected to the center of the inner wall of the special-shaped shell (467); a plurality of extrusion plates (469) are fixedly connected to the four sides of the special-shaped capsule (468); the outer wall of the extrusion plate (469) is sleeved and slidably connected to the inner wall of the special-shaped shell (467); and one end of the elastic tube (4513) is in communication with the special-shaped capsule (468); The clamping block (457) squeezes the lubricating oil inside the arc-shaped shell (456), and the lubricating oil enters the interior of the arc-shaped tube (462) through the curved tube (461). After the lubricating oil enters the interior of the arc-shaped tube (462), it pushes the slider (464) to move.

2. The intersecting node multi-axial fatigue testing machine according to claim 1, characterized in that: An impact assembly (47) is provided on one side of the disc (3), the impact assembly (47) comprising a round box (471) fixedly connected to the disc (3) and away from the round shell (41); one end of the rotating shaft (44) away from the motor (43) is fixedly connected to a special-shaped plate (472); one end of the special-shaped plate (472) penetrates and is rotatably connected to a four-corner plate (473); one side of the four-corner plate (473) is rotatably connected to flexible strips (474); the outer wall of the round box (471) is connected to a plurality of round tubes (475) on all sides; the inner wall of the round tube (475) is sleeved with and slidably connected to an extrusion shell (477); both sides of the inner wall of the extrusion shell (477) are fixedly connected to fixing rods (476); One end of the flexible strip (474) away from the four-corner plate (473) is rotatably connected to the outer wall of the fixing rod (476); two ends of one side of the outer wall of the extrusion shell (477) are respectively fixedly connected to rubber hemispheres (478); a side of the extrusion shell (477) close to the rubber hemisphere (478) is fixedly connected to a rubber rope (479); one end of the rubber rope (479) away from the extrusion shell (477) is fixedly connected to an impact plate (4710); one end of the impact plate (4710) is rotatably connected to a concave block (4712); one side of the concave block (4712) is fixedly connected to the outer wall of the round box (471); one side of the impact plate (4710) close to the rubber rope (479) is fixedly connected to an arc spring (4711); one end of the arc spring (4711) is fixedly connected to one side of the outer wall of the round tube (475).

3. The intersecting node multi-axial fatigue testing machine according to claim 2, characterized in that: A stretching assembly (48) is provided on one side of the four-corner plate (473), and the stretching assembly (48) comprises a connecting curved rod (481) rotatably connected to a side of the four-corner plate (473) away from the irregular plate (472), a sleeve plate (482) is sleeved and fixedly connected to the outer wall of the connecting curved rod (481), and the outer wall of the sleeve plate (482) is sleeved and rotatably connected to the inner wall of the round box (471), and one end of the connecting curved rod (481) away from the four-corner plate (473) is fixedly connected to the irregular plate (483), and the connecting curved rod (481) is fixedly connected to the irregular plate (483). A side of the disc (481) is fixedly connected to an inclined rod (484), a side wall of an end of the inclined rod (484) away from the connecting bent rod (481) is fixedly connected to a flexible rope (485), an end of the flexible rope (485) away from the inclined rod (484) is fixedly connected to a lifting plate (486), an outer wall of the lifting plate (486) is sleeved with and fixedly connected to a square shell (487), one side of the square shell (487) is fixedly connected to the side wall of the disc (3), and hook rods (488) are respectively fixedly connected to the two sides of the bottom of the lifting plate (486).

4. A method for using an intersecting node multi-axial fatigue testing machine, the method is implemented based on the intersecting node multi-axial fatigue testing machine according to claim 3, comprising the following steps, characterized in that: Step 1: Place the workpiece (4510) on the side wall of the disc (3), start the motor (43), the motor (43) drives the rotating shaft (44) to rotate, the rotating shaft (44) drives the transmission (451) to rotate, the transmission (451) drives the rhombus disc (452) to rotate, the rhombus disc (452) drives the bending bar (453) to rotate, and the bending bar (453) drives the rotating block (454) to move on the inner wall of the slot hole (455) due to the position restriction of the slot hole (455), and the rotating block (454) drives the arc shell (456) to move. The arc-shaped shell (456) drives the clamping block (457) to move, and the two clamping blocks (457) approach each other. When the clamping block (457) clamps the workpiece (4510), it is subjected to the reaction force of the workpiece (4510), and the clamping block (457) moves toward the inside of the arc-shaped shell (456). The slider (464) drives the arc-shaped rod (465) to move, the arc-shaped rod (465) drives the rotating rod (466) to move, the rotating rod (466) drives the special-shaped shell (467) to move, and the special-shaped shell (467) drives the extrusion plate (469) to move. Step 2: When one of the extrusion plates (469) is subjected to a shear test on the surface of the workpiece (4510), the extrusion plate (469) is subjected to a reaction force from the workpiece (4510), so that the extrusion plate (469) moves toward the inside of the special-shaped shell (467). During the movement of the extrusion plate (469), the special-shaped capsule (468) is squeezed, and the special-shaped capsule (468) is deformed by the squeezing. The special-shaped capsule (468) drives the extrusion plate (469) to move. During the movement of the extrusion plate (469), the extrusion plate (469) contacts the workpiece (4510). During the reverse movement of the clamping block (457), the clamping block (457) drives the cross bar (458) to move in the reverse direction. The cross bar (458) drives the pressure plate (4511) to move. During the movement of the pressure plate (4511), the airflow inside the connecting shell (4512) enters the inside of the special-shaped capsule (468) through the elastic tube (4513); Step 3: When the rotating shaft (44) rotates, the rotating shaft (44) drives the special-shaped plate (472) to rotate, the special-shaped plate (472) drives the four-corner plate (473) to rotate eccentrically, and the four-corner plate (473) drives the flexible strip (474) to rotate. When the flexible strip (474) is driven by the four-corner plate (473), one of the flexible strips (474) drives the fixed rod (476) to move toward the outside of the round tube (475), and the fixed rod (476) The extrusion shell (477) is driven to move toward the outside of the circular tube (475), and the extrusion shell (477) drives the rubber hemisphere (478) to move, thereby extruding the inner wall of the workpiece (4510), and the extrusion shell (477) drives the rubber rope (479) to move, so that the rubber rope (479) is stretched, and the rubber rope (479) drives the impact plate (4710) to move, and during the movement of the impact plate (4710), one side of the workpiece (4510) can be knocked; Step 4: After the impact plate (4710) strikes the workpiece (4510), the impact plate (4710) is elastically deformed by the arc spring (4711), so that the impact plate (4710) is reset. At the same time, the four-corner plate (473) drives the connecting curved rod (481) to rotate around the rotating shaft (44). During the process of the connecting curved rod (481) driving the irregular plate (483) to rotate, the irregular plate (483) is subjected to the irregular setting of the irregular plate (483). The irregular plate (483) squeezes the impact plate (4710 to different degrees. During the rotation of the connecting curved rod (481), the inclined rod (484) is driven to rotate. The inclined rod (484) drives the flexible rope (485) to rotate. The flexible rope (485) is stretched, so that the lifting plate (486) is lifted. The lifting plate (486) drives the hook rod (488) to lift. During the lifting process of the hook rod (488), the workpiece (4510) is hooked and stretched.

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