A multi-purpose high frequency fatigue testing machine

Abstract

The present application belongs to the technical field of test equipment, and particularly relates to a multipurpose high-frequency fatigue testing machine, which comprises a main control device and a fatigue testing machine, wherein the fatigue testing machine comprises a base machine and an electromagnetic high-frequency generator body, a counterweight platform is connected and assembled below the electromagnetic high-frequency generator body through a connecting rod, clamp assemblies are assembled on the surface of the base machine and the lower surface of the counterweight platform; counterweight weights are adjustably stacked on the surface of the counterweight platform, and are used to match the resonance point by replacing the counterweights; and a plate clamp is detachably assembled with the clamp assembly, and is used to detect the cracks generated by the test sample during the test. The present application can replace manual adjustment of the counterweight, realize quick and convenient operation, and can also detect the plate with cracks in time during the test, so as to stop the test in time before the test sample is broken.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of test equipment, and particularly relates to a multipurpose high-frequency fatigue testing machine. BACKGROUND

[0002] The working principle of the high-frequency fatigue testing machine is mainly based on mechanical resonance principle, high-frequency alternating load is generated through an electromagnetic or motor driving system to realize efficient testing of material fatigue performance; the high-frequency fatigue testing machine comprises a mechanical vibration system formed by a sample, a configuration mass block, a spring system and an exciter; when the excitation force frequency generated by the exciter is consistent with the inherent frequency of the system, the system resonates, at this time, small power input can generate large amplitude alternating load on the sample, wherein, the electromagnetic high-frequency fatigue testing machine is suitable for high-rigidity materials (such as metal).

[0003] Problems existing in the prior art:

[0004] Manual frequency adjustment limitation: in the electromagnetic high-frequency fatigue testing machine, the resonance point needs to be matched by replacing the counterweight block or adjusting the spring pre-tightening force, which is complicated and depends on experience;

[0005] Crack-induced frequency drift problem: when the sample cracks, the resonance point will be offset, which will directly cause unstable amplitude, directly affecting the test process and test results, in addition, the generation of cracks will also cause the problem of sample fracture, and sudden sample fracture in the resonance state may cause uncontrolled energy release of the system, damaging the sensor or clamp. SUMMARY

[0006] The purpose of the application is to provide a multipurpose high-frequency fatigue testing machine which can replace manual flexible adjustment of the counterweight, realize rapid and convenient operation, and also can detect the cracked plate in time during the test, so as to stop the test in time before the sample is fractured.

[0007] The technical scheme adopted by the application is as follows:

[0008] A multipurpose high-frequency fatigue testing machine comprises a main control device and a fatigue testing machine, the fatigue testing machine comprises a base machine and an electromagnetic high-frequency generator body, a counterweight table is connected and assembled below the electromagnetic high-frequency generator body through a connecting rod, clamp assemblies are assembled on the surface of the base machine and the lower surface of the counterweight table;

[0009] Counterweight blocks, a plurality of counterweight blocks are adjustably stacked on the surface of the counterweight table, and are used to match the resonance point by replacing the counterweight;

[0010] A plate clamp, which is detachably assembled with the clamp assembly, is used to detect the cracks generated in the test process of the sample.

[0011] The electromagnetic high-frequency generator body is vertically assembled above the bottom machine, the two sides of the inside of the bottom machine are rotationally assembled with screw pipes through a driving mechanism, the two sides below the electromagnetic high-frequency generator body are fixedly assembled with screw rods, and the screw rods are screwed with the corresponding screw pipes, and the two sides of the surface of the bottom machine are fixedly assembled with guide rods for guiding the lifting of the electromagnetic high-frequency generator body.

[0012] The top of the screw rod is integrally provided with a straight rod section, and the outer surface of the straight rod section is movably sleeved with a sleeve pipe, the two sides of the bottom of the electromagnetic high-frequency generator body are fixedly provided with air cylinders, and the telescopic output ends of the air cylinders are connected with the corresponding sleeve pipes.

[0013] The two opposite inner sides of the sleeve pipe are hingedly provided with Z-shaped hook frames, and the middle part of the Z-shaped hook frame is provided with a middle through groove, the two ends of the side wall of the sleeve pipe are integrally provided with limiting blocks for limiting the rotation range of the Z-shaped hook frame, and the top of the side of the sleeve pipe close to the Z-shaped hook frame is fixedly provided with an electromagnet.

[0014] The top of the outer wall of the two sides of the counterweight platform is integrally provided with an auxiliary block.

[0015] The inside of the counterweight is throughly provided with a through hole for the connecting rod to pass through, the two sides of the edge of the counterweight are provided with edge grooves, and the edge groove blocks are embedded and assembled in the edge grooves, and the outer wall of the edge groove block is integrally provided with a convex shell, and the middle part of the convex shell is provided with a middle groove.

[0016] The two sides of the middle part of the counterweight are throughly provided with through holes, the two sides of the upper and lower surfaces of the counterweight are symmetrically embedded and slidably assembled with mountain-shaped connecting frames, the two same-direction mountain-shaped connecting frames are connected through the connecting bodies passing through the through holes, the mountain-shaped connecting frames on the two sides are connected through the springs in the through holes, the friction blocks are connected to the support ends of the mountain-shaped connecting frames in the through holes, and the friction force of the friction blocks tightly adhering to the connecting rod is used to limit the relative movement between the counterweight and the connecting rod, and the two same-direction mountain-shaped connecting frames are commonly connected with the penetrating blocks at the support ends of the edge grooves.

[0017] The penetrating blocks movably pass through the corresponding edge groove blocks, and the upper and lower surfaces of the penetrating blocks are integrally provided with outer plates and inner plates, respectively, the inner plate is below the inner side of the outer plate, and the inner plate and the outer plate pass through the middle groove;

[0018] When the Z-shaped hook frame hooks the convex shell and drives the corresponding counterweight to move upward, the penetrating block is extruded by the Z-shaped hook frame and drives the mountain-shaped connecting frame to move inward.

[0019] The plate clamp comprises a base and a lifting seat, and the base and the lifting seat are telescopically assembled, the surface of the base away from the lifting seat is integrally provided with an end column for clamping by the clamp assembly, the two sides of the surface of the base are fixedly provided with bolt holes, and the two sides of the inside of the lifting seat are inserted with bolts screwed with the corresponding bolt holes.

[0020] The two sides of the base surface are symmetrically assembled with wedge blocks, the inner wall of the cavity through which the lifting seat is provided with a slope section, and the outer wall of the wedge block is in extrusion contact with the corresponding slope section, and the inner side of the two wedge blocks is arrayed with clamping blocks.

[0021] The inner wall of the wedge block is arrayed with a macro cavity, one side of the clamping block is integrally provided with an internal body, and the internal body is slidingly assembled in the corresponding macro cavity, a spring two is connected between the top of the internal body and the inner wall of the macro cavity, an oil cavity is formed in the internal body, a fixed oil plug is fixedly installed in the internal body of the macro cavity, and the fixed oil plug is inserted into the corresponding oil cavity.

[0022] The outer wall of the base edge is fixedly installed with a measuring box, the inside of the measuring box is provided with a chip board and an oil pressure pipe, the oil pressure pipe is arrayed, the end of the oil pipe is connected with the corresponding oil pressure pipe, the internal body of the oil pressure pipe away from the oil pipe is slidingly assembled with a movable oil plug, and the movable oil plug is embeddedly installed with a pressure sensor at one end in the internal body of the oil pressure pipe.

[0023] The technical effects obtained by the application are as follows:

[0024] In the application, the liftable sleeve cooperates with the specially designed counterweight, the number of counterweight placed on the counterweight table can be flexibly changed, the effect of adjusting the counterweight is realized, and the traditional electromagnetic resonance structure needs to be matched with the resonance point by manually replacing the counterweight block, so that the quick and convenient operation is realized.

[0025] The plate clamp designed in the application can detect the cracked plate in time in the test under the premise of ensuring the normal plate clamping function, detect the unexpected cracking of the test plate through the instantaneous change of the oil pressure in the corresponding channel, stop the test in time before the sample is broken, avoid the system energy release out of control caused by the sample breaking, damage the sensor or the clamp, prevent the resonance point from deviating caused by the sample cracking, and ensure the accuracy of the test result. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the integrated structure diagram of the testing machine provided by the embodiment of the application;

[0027] Figure 2 It is the front view structure diagram of the fatigue testing machine provided by the embodiment of the application;

[0028] Figure 3 It is the loading structure diagram of the counterweight provided by the embodiment of the application;

[0029] Figure 4 is a structural exploded view of a single counterweight provided by an embodiment of the present application;

[0030] Figure 5 is a combined variation diagram of a sleeve and a side slot block provided by an embodiment of the present application;

[0031] Figure 6 is a combined process diagram of a sleeve and a side slot block provided by an embodiment of the present application;

[0032] Figure 7 is a structural view of a two-plate clamp provided by an embodiment of the present application;

[0033] Figure 8 is an exploded sectional view of a plate clamp provided by an embodiment of the present application;

[0034] Figure 9 is a sectional view of a base provided by an embodiment of the present application;

[0035] Figure 10 is a partial enlarged structural view at A in Figure 9

[0036] Figure 11 is a partial enlarged structural view at B in Figure 9

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

[0038] 1. master control device;

[0039] 2. fatigue testing machine; 201. base machine; 202. screw pipe; 203. screw rod; 204. straight rod section; 205. electromagnetic high frequency generator body; 206. guide rod; 207. connecting rod; 208. counterweight table; 209. clamp assembly; 210. air cylinder; 211. sleeve; 212. Z-shaped hook bracket; 213. middle through slot; 214. limiting block; 215. electromagnet; 216. auxiliary block;

[0040] 3. counterweight; 301. side slot; 302. through hole; 303. through opening; 304. cross-shaped connecting bracket; 305. spring one; 306. friction block; 307. through block; 308. outer plate; 309. inner plate; 310. side slot block; 311. convex shell; 312. centering slot;

[0041] ​​4, board fixture; 401, base; 402, lifting seat; 403, wedge block; 404, inclined section; 405, bolt; 406, bolt hole; 407, clamping block; 408, microcavity; 409, built-in body; 410, oil cavity; 411, spring two; 412, oil retaining plug; 413, oil pipe; 414, measuring box; 415, chip board; 416, oil pressure pipe; 417, movable oil plug; 418, pressure sensor; 419, end column. DETAILED DESCRIPTION

[0042] In order to make the objects and advantages of the present application clearer, the following will specifically describe the present application in conjunction with embodiments. It should be understood that the following description is only used to describe one or several specific embodiments of the present application, and does not strictly limit the scope of protection specifically requested by the present application.

[0043] As shown in Figures 1-11 A multi-purpose high-frequency fatigue testing machine, comprising a main control device 1 and a fatigue testing machine 2, the fatigue testing machine 2 comprising a base machine 201 and an electromagnetic high-frequency generator body 205, a counterweight table 208 is connected and assembled below the electromagnetic high-frequency generator body 205 through a connecting rod 207, the surface of the base machine 201 and the lower surface of the counterweight table 208 are both assembled with a fixture assembly 209, the electromagnetic high-frequency generator body 205 is assembled in a lifting manner above the base machine 201, two sides inside the base machine 201 are rotatably assembled with a screw pipe 202 through a driving mechanism, two sides below the electromagnetic high-frequency generator body 205 are fixedly assembled with a screw rod 203, and the screw rod 203 is screwed with the corresponding screw pipe 202, and two sides of the surface of the base machine 201 are fixedly assembled with a guide rod 206 for guiding the lifting of the electromagnetic high-frequency generator body 205.

[0044] According to the above structure, the fixture assembly 209 can directly clamp the measured part or other clamps, the screw pipe 202 is driven to rotate through the driving mechanism, the screwing process between the screw rod 203 and the screw pipe 202 is used to control the lifting movement of the electromagnetic high-frequency generator body 205, the electromagnetic high-frequency generator body 205 generates high-frequency load, and acts on the measured part below through the connecting rod 207 and the counterweight table 208, thereby realizing efficient testing of the fatigue performance of the part. The above process is all prior art, and will not be described in detail here.

[0045] Example one:

[0046] Referring to the drawings Figures 2-3 , Figures 5-6, the top of the screw rod 203 is integrally provided with a straight rod segment 204, the outer surface of the straight rod segment 204 is movably sleeved with a sleeve pipe 211, the bottom of the electromagnetic high-frequency generator body 205 is fixedly provided with a pneumatic cylinder 210 on both sides, and the telescopic output end of the pneumatic cylinder 210 is connected with the corresponding sleeve pipe 211; the inner sides of the two sleeve pipes 211 are hingedly provided with Z-shaped hooks 212, the middle portions of the Z-shaped hooks 212 are provided with middle through grooves 213, the two ends of the side walls of the sleeve pipes 211 are integrally provided with limiting blocks 214 for limiting the rotation range of the Z-shaped hooks 212, the top of the side of the sleeve pipe 211 close to the Z-shaped hook 212 is fixedly provided with an electromagnet 215, and the top of the outer wall of the two sides of the counterweight table 208 is integrally provided with auxiliary blocks 216.

[0047] According to the above structure, in the counterweight adjustment work, the sleeve pipe 211 is controlled to move up and down by the pneumatic cylinder 210, so as to change the counterweight borne by the counterweight table 208.

[0048] The counterweight weights 3 are adjustably stacked on the surface of the counterweight table 208, and are used to match the resonance point by replacing the counterweight;

[0049] Referring to the accompanying drawings Figure 4 The inside of the counterweight weight 3 is provided with a through hole 302 for the connecting rod 207 to penetrate, the two sides of the edge of the counterweight weight 3 are provided with edge grooves 301, and the edge grooves 301 are embedded and assembled with edge groove blocks 310, the outer wall of the edge groove block 310 is integrally provided with a convex shell 311, and the middle portion of the convex shell 311 is provided with a middle groove 312.

[0050] Referring to the accompanying drawings Figure 4 The two sides of the middle portion of the counterweight weight 3 are provided with through holes 303, the two sides of the upper and lower surfaces of the counterweight weight 3 are symmetrically embedded and slidably assembled with mountain-shaped connecting frames 304, the two same-direction mountain-shaped connecting frames 304 on the upper and lower surfaces are connected through a connecting body penetrating the through hole 303, the mountain-shaped connecting frames 304 on the two sides are connected through a spring 305 inside the through hole 303, the mountain-shaped connecting frame 304 is connected with a friction block 306 at the branch end of the through hole 302, and the friction block 306 is used to limit the relative movement between the counterweight weight 3 and the connecting rod 207 through the friction force when the friction block 306 is tightly attached to the connecting rod 207, and the two same-direction mountain-shaped connecting frames 304 are jointly connected with a penetrating block 307 at the branch end of the edge groove 301.

[0051] Referring to the accompanying drawings Figure 4 The penetrating block 307 movably penetrates the corresponding edge groove block 310, the upper and lower surfaces of the penetrating block 307 are integrally provided with an outer plate 308 and an inner plate 309, the inner plate 309 is below the inner side of the outer plate 308, and the inner plate 309 and the outer plate 308 penetrate the middle groove 312;

[0052] Referring to the accompanying drawings Figures 5-6, Z hook frame 212 hook convex shell 311 and pre-driven corresponding counterweight weight 3 up, wear block 307 by Z hook frame 212 extrusion and drive the mountain letter connected frame 304 to move inboard.

[0053] According to the above structure, by changing the number of counterweight weight 3 directly placed on the counterweight platform 208, the work of adjusting the counterweight is realized, the specific process is as follows: when it is needed to carry a certain counterweight weight 3 away from the surface of the counterweight platform 208, the control cylinder 210 is controlled to move the sleeve 211 to the bottom of the counterweight weight 3, when the Z hook frame 212 passes the edge groove block 310 of the counterweight weight 3, it will be temporarily rotated and lifted due to obstruction, as shown in the accompanying drawings Figure 6 , after the Z hook frame 212 rotates back to its original position, the sleeve 211 is controlled to start moving upwards, when the Z hook frame 212 hooks the convex shell 311 and drives the corresponding counterweight weight 3 to move upwards, the wear block 307 is extruded by the Z hook frame 212 and drives the mountain letter connected frame 304 to move inboard, as shown in the accompanying drawings Figure 5 , at this time, the mountain letter connected frame 304 on both sides of the counterweight weight 3 will move towards the center of the circle, the spring 305 will be compressed and the friction block 306 will move away from the corresponding perforation 302, since the perforation 302 at this time is away from the connecting rod 207, the counterweight weight 3 can be easily driven upwards by the sleeve 211, thereby reducing the number of counterweight weights 3 directly placed on the counterweight platform 208;

[0054] When it is needed to carry two or more counterweight weights 3 upwards, it is only needed to control the sleeve 211 to move to the bottom of the corresponding lowermost counterweight weight 3, when the wear block 307 on both sides of the lowermost counterweight weight 3 is extruded and moved, the outer plate 308 on the surface of the wear block 307 will extrude the inner plate 309 above it, driving the upper wear block 307 to move synchronously towards the center of the circle, all counterweight weights 3 above the counterweight weight 3 can be driven upwards;

[0055] When it is needed to control the sleeve 211 to move upwards without carrying any counterweight weight 3, it is only needed to control the sleeve 211 to move to the bottom of the auxiliary block 216 first, and then control the Z hook frame 212 to rotate close to the electromagnet 215 by means of the obstruction of the auxiliary block 216, at this time, the electromagnet 215 is energized, the Z hook frame 212 will maintain the lifting angle, and finally the sleeve 211 is controlled to move upwards;

[0056] The above process, the sleeve 211 that can move up and down cooperates with the specially designed counterweight weight 3, which can flexibly change the number of counterweight weights 3 directly placed on the counterweight platform 208, realizes the effect of adjusting the counterweight, and changes the traditional electromagnetic resonance structure which needs to be matched with the resonance point by manually replacing the counterweight block, realizes fast and convenient operation.

[0057] The working principle of the present application is as follows: in the counterweight adjustment work, the sleeve 211 is controlled to move up and down by the air cylinder 210, when it is needed to carry a certain counterweight 3 away from the surface of the counterweight table 208, the control air cylinder 210 makes the sleeve 211 move below the counterweight 3, when the Z-shaped hook frame 212 passes the edge slot block 310 of the counterweight 3, it will temporarily rotate and rise due to the blockage, as shown in the accompanying drawings Figure 6 , after the Z-shaped hook frame 212 rotates back to the original position, the sleeve 211 is controlled to start moving up, when the Z-shaped hook frame 212 hooks the convex shell 311 and drives the corresponding counterweight 3 to move up, the block 307 is pressed by the Z-shaped hook frame 212 and drives the inverted V-shaped connecting frame 304 to move inward, as shown in the accompanying drawings Figure 5 , at this time, the inverted V-shaped connecting frames 304 on both sides of the counterweight 3 move towards the center of the circle, the spring 305 is compressed and the friction block 306 is away from the corresponding perforation 302, because the perforation 302 is away from the connecting rod 207 at this time, the counterweight 3 can be easily driven to move up by the sleeve 211, thereby reducing the number of counterweights 3 directly placed on the counterweight table 208, facilitating the replacement of the counterweight to match the resonance point, and achieving the purpose of replacing manual adjustment.

[0058] Example two

[0059] The plate clamp 4 is detachably assembled with the clamp assembly 209, and is used to explore the cracks generated by the test sample in the test process.

[0060] Referring to the accompanying drawings Figures 7-8 , the plate clamp 4 comprises a base 401 and a lifting seat 402, the base 401 and the lifting seat 402 are telescopic assembled, the surface of the base 401 away from the lifting seat 402 is integrally provided with an end column 419 for connecting with the clamp assembly 209, both sides of the surface of the base 401 are fixedly provided with a bolt hole 406, and the inside of the lifting seat 402 is inserted with a bolt 405 screw-connected with the corresponding bolt hole 406.

[0061] Referring to the accompanying drawings Figures 8-11 , both sides of the surface of the base 401 are symmetrically slidably assembled with wedge blocks 403, the inner wall of the cavity of the lifting seat 402 for the wedge blocks 403 to penetrate is provided with a bevel section 404, the wedge blocks 403 are in extrusion contact between the outer wall bevel and the corresponding bevel section 404, and the inside of the two wedge blocks 403 are arrayedly assembled with clamping blocks 407.

[0062] According to the above structure, when the plate-shaped material is clamped by the plate clamp 4, the to-be-tested plate is placed on the inside of the two groups of wedge blocks 403, then the bolt 405 is screwed by a wrench, the base 401 and the lifting seat 402 will be contracted, the wedge blocks 403 will be in extrusion contact between the outer wall bevel and the corresponding bevel section 404, and with the contraction movement, the two wedge blocks 403 will constantly approach, and the clamping blocks 407 will cooperate to achieve the effect of clamping the plate-shaped material.

[0063] Referring to the drawings Figures 8-11 The inner wall of the wedge-shaped block 403 is arrayed with micro distance cavities 408, one side of the clamping block 407 is integrally provided with an internal body 409, and the internal body 409 is slidingly assembled in the inside of the corresponding micro distance cavity 408. A spring 411 is connected between the top of the internal body 409 and the inner wall of the micro distance cavity 408. An oil cavity 410 is formed in the inside of the internal body 409. A fixed oil plug 412 is fixedly installed in the inside of the micro distance cavity 408. The fixed oil plug 412 is inserted into the inside of the corresponding oil cavity 410. The bottom of each internal body 409 is connected with a branch pipe. The branch pipes at the bottoms of the two internal bodies 409 located inside the two wedge-shaped blocks 403 are commonly connected with an oil pipe 413.

[0064] Referring to the drawings Figures 8-11 A measuring box 414 is fixedly installed on the outer wall of the edge of the base 401. A chip plate 415 and an oil pressure pipe 416 are arranged in the inside of the measuring box 414. The oil pressure pipes 416 are arrayed. The end of the oil pipe 413 is connected with the corresponding oil pressure pipe 416. An active oil plug 417 is telescopically assembled in the inside of the end of the oil pressure pipe 416 away from the oil pipe 413. A pressure sensor 418 is embeddedly installed at the end of the active oil plug 417 in the inside of the oil pressure pipe 416. A data line interface is arranged on the outer wall of the measuring box 414. The data line interface is connected with the main control equipment 1 through a data line.

[0065] According to the above structure, before the fatigue test of the clamped plate, the electromagnetic high-frequency generator body 205 is controlled to rise a small distance, so that the internal body 409 inside the clamping block 407 moves to the limit position of the micro distance cavity 408, and the spring 411 is compressed to the limit. Then the high-frequency fatigue test is carried out. In the test, the oil pressure change process in each oil cavity 410 is the same on the premise that the plate does not break. However, when the plate breaks accidentally, since the cracks are mostly generated from the edge of the plate, the clamping force of the clamping block 407 located at the edge changes instantaneously. The internal body 409 at this position moves slightly under the elastic force of the spring 411. The oil pressure in the oil cavity 410 changes slightly. At this time, the pressure sensor 418 in the oil pressure pipe 416 connected with the oil cavity 410 can measure the instantaneous change. When the change is detected by the main control equipment 1, the equipment immediately triggers the emergency stop protection mechanism. In the above process, the plate clamp 4 can detect the plate with cracks in time during the test on the premise of ensuring the normal plate clamping function. The instantaneous change of the oil pressure in the corresponding channel detects that the test plate has cracked accidentally. Therefore, the test can be stopped in time before the test sample breaks, the system energy release out of control caused by the test sample breaking is avoided, the damage to the sensor or the clamp is prevented, the situation that the resonance point deviates caused by the test sample cracking is prevented, and the accuracy of the test result is ensured.

[0066] The working principle of the present application is as follows: the plate to be tested is placed on the inner side of the upper and lower two groups of wedge-shaped blocks 403, then the bolts 405 are tightened by using a wrench, the clamping block 407 is matched to achieve the effect of clamping the plate, then the built-in body 409 in the inner side of the clamping block 407 is moved to the limit position of the micro-distance cavity 408 by controlling the electromagnetic high-frequency generator body 205 to rise a small distance, and the spring 411 is compressed to the limit, and then the high-frequency fatigue test is carried out. In the test, when the plate is accidentally broken, since the cracks are mostly generated from the edge of the plate, the clamping force of the clamping block 407 located at the edge changes at the moment of crack, the built-in body 409 at the place moves slightly under the elastic force of the spring 411, the oil pressure in the oil cavity 410 changes slightly, at this time, the pressure sensor 418 in the oil pressure pipe 416 connected with the oil cavity 410 can measure the instantaneous change, when the change is detected, it represents that the test plate has cracks, and the device immediately starts the emergency stop protection mechanism.

[0067] The above is only the preferred embodiment of the present application, it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, can also make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application, such as no special description and limitation, are implemented according to the conventional means in the art.

Claims

1. A multi-purpose high-frequency fatigue testing machine, comprising a main control device (1) and a fatigue testing machine (2), the fatigue testing machine (2) comprising a base machine (201) and an electromagnetic high-frequency generator body (205), a counterweight platform (208) being assembled directly below the electromagnetic high-frequency generator body (205) via a connecting rod (207), and clamping assemblies (209) being assembled on the surface of the base machine (201) and the lower surface of the counterweight platform (208), characterized in that: The counterweights (3) are stacked in an adjustable manner on the surface of the counterweight platform (208) and are used to match the resonance point by changing the counterweights. Screws (203) are fixedly assembled on both sides below the electromagnetic high frequency generator body (205). A straight rod section (204) is integrally provided on the top of the screw (203), and a sleeve (211) is movably sleeved on the outer surface of the straight rod section (204). Z-shaped hooks (212) are hinged to the inner sides of the two sleeves (211) facing each other. The counterweight (3) has side grooves (301) on both sides of its edge, and a side groove block (310) is embedded in the side groove (301). The outer wall of the side groove block (310) is integrally provided with a convex shell (311), and a center groove (312) is provided in the middle of the convex shell (311). The counterweight (3) has mountain-shaped connecting frames (304) symmetrically embedded and slidably assembled on both sides of its upper and lower surfaces. The two mountain-shaped connecting frames (304) in the same direction are located at the support ends of the side groove (301) and are connected to a through block (307). The through block (307) movably passes through the corresponding side groove block (310). When the Z-shaped hook frame (212) hooks the convex shell (311) and pre-drives the corresponding counterweight (3) to move upward, the through block (307) is squeezed by the Z-shaped hook frame (212) and drives the mountain-shaped connecting frame (304) to move inward; The plate clamp (4) is detachably assembled with the clamp assembly (209) and is used to detect cracks generated in the sample during the test. The plate clamp (4) includes a base (401) and a lifting seat (402). Wedge blocks (403) are symmetrically slidably assembled on both sides of the surface of the base (401). Clamping blocks (407) are arrayed on the inner sides of the two wedge blocks (403). Micro-cavities (408) are arrayed on the inner wall of the wedge blocks (403). An integrated body (409) is integrally provided on one side of the clamping block (407). An oil cavity (410) is opened inside the integrated body (409). A fixed oil plug (412) is fixedly installed inside the micro-cavities (408). The fixed oil plug (412) is inserted into the corresponding oil cavity (410). A branch pipe is connected to the bottom of each integrated body (409).

2. The multi-purpose high-frequency fatigue testing machine according to claim 1, characterized in that: The electromagnetic high-frequency generator body (205) is mounted in a lifting manner directly above the base unit (201). The two sides inside the base unit (201) are equipped with solenoids (202) through a drive mechanism, and the screw (203) is screwed to the corresponding solenoid (202). The two sides of the surface of the base unit (201) are fixedly equipped with guide rods (206) for guiding the electromagnetic high-frequency generator body (205) to rise and fall.

3. The multi-purpose high-frequency fatigue testing machine according to claim 2, characterized in that: Both sides of the bottom of the electromagnetic high-frequency generator body (205) are fixedly installed with cylinders (210), and the extension and retraction output end of the cylinder (210) is connected to the corresponding sleeve (211). A central through groove (213) is provided in the middle of the Z-shaped hook frame (212). Limiting blocks (214) for limiting the rotation range of the Z-shaped hook frame (212) are integrally provided at both ends of the side wall of the sleeve (211). An electromagnet (215) is fixedly installed on the top of the sleeve (211) near the Z-shaped hook frame (212). The top of the outer walls on both sides of the counterweight platform (208) is integrally provided with auxiliary blocks (216).

4. The multi-purpose high-frequency fatigue testing machine according to claim 3, characterized in that: The counterweight (3) has a through hole (302) inside for the connecting rod (207) to pass through.

5. The multi-purpose high-frequency fatigue testing machine according to claim 4, characterized in that: Both sides of the middle part of the counterweight (3) are provided with through openings (303). The two mountain-shaped connecting frames (304) in the same direction are connected by the connecting body through the through openings (303). The mountain-shaped connecting frames (304) on both sides are connected by a spring (305) located inside the through opening (303). The support end of the mountain-shaped connecting frame (304) located in the through hole (302) is connected to a friction block (306). The friction force of the friction block (306) when it is in close contact with the connecting rod (207) is used to limit the relative movement between the counterweight (3) and the connecting rod (207).

6. The multi-purpose high-frequency fatigue testing machine according to claim 5, characterized in that: The upper and lower surfaces of the through block (307) are respectively integrally provided with an outer plate (308) and an inner plate (309). The inner plate (309) is located below the inner side of the outer plate (308), and both the inner plate (309) and the outer plate (308) pass through the central groove (312).

7. The multi-purpose high-frequency fatigue testing machine according to claim 1, characterized in that: The base (401) and the lifting seat (402) form a telescopic assembly. The surface of the base (401) away from the lifting seat (402) is integrally provided with an end post (419) for clamping by the clamping assembly (209). Both sides of the surface of the base (401) are fixedly provided with bolt holes (406). The two sides inside the lifting seat (402) are inserted with bolts (405) that are screwed into the corresponding bolt holes (406).

8. The multi-purpose high-frequency fatigue testing machine according to claim 7, characterized in that: The inner wall of the chamber through which the wedge block (403) passes in the lifting seat (402) is set as an inclined section (404), and the inclined surface of the outer wall of the wedge block (403) and the corresponding inclined section (404) are in extrusion contact.

9. The multi-purpose high-frequency fatigue testing machine according to claim 8, characterized in that: The built-in body (409) is slidably assembled inside the corresponding micro cavity (408). A spring (411) is connected between the top of the built-in body (409) and the inner wall of the micro cavity (408). The ends of the branch pipes at the bottom of the two built-in bodies (409) located inside the two wedge blocks (403) and arranged opposite to each other are connected to an oil pipe (413).

10. The multi-purpose high-frequency fatigue testing machine according to claim 9, characterized in that: A measuring box (414) is fixedly installed on the outer wall of the base (401). The measuring box (414) contains a chip board (415) and a hydraulic tube (416). The hydraulic tubes (416) are arranged in an array. The end of the oil pipe (413) is connected to the corresponding hydraulic tube (416). A live oil plug (417) is telescopically assembled inside the end of the hydraulic tube (416) away from the oil pipe (413). A pressure sensor (418) is embedded in the end of the live oil plug (417) inside the hydraulic tube (416).

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