A high frequency impact fatigue testing machine

Abstract

The application discloses a high-frequency impact fatigue testing machine and relates to the field of metal impact testing, which solves the problem that a fixed clamping plate affects the flexibility of a metal pipe when the metal pipe is impacted. The high-frequency impact fatigue testing machine comprises a machine tool structure, a metal pipe preheating structure is arranged at the top of one side of the machine tool structure, and a flexible clamping assembly is arranged at the middle of the one side of the machine tool structure. The flexible clamping assembly comprises an inner supporting plate, a fixed plug is arranged at the top of the inner supporting plate, the fixed plug is provided with four groups, an outer connecting ring is arranged on the outer side of the inner supporting plate, an impact positioning block is arranged at the top of the outer connecting ring, and the outer connecting ring is used for rotating to impact and bend the metal pipe. The metal pipe is penetrated through the fixed plug, the outer connecting ring drives the impact positioning block to rotate, the metal pipe is impacted and bent, the metal pipe can be impacted for multiple times, and experimental data of the metal pipe under high-frequency impact can be tested.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of metal impact testing, in particular to a high-frequency impact fatigue testing machine. BACKGROUND

[0002] Metal pipe fittings are an important variety of metal semi-finished products, including rolled pipes, extruded pipes, drawn pipes, and pipes produced by combination, and welded pipes and welded rolled pipes for seamed pipes. Metal pipes need to face bending caused by transverse extrusion force during use because they are long strips. The device is for fatigue testing of metal pipes under high-frequency impact.

[0003] The existing metal pipe fitting based on positioning and clamping metal pipe fitting profile hot forming equipment and other metal pipe fittings have the following defects in specific use:

[0004] 1. The metal pipe fitting workpiece needs to be fixed by a clamp plate during testing. The clamping effect of the clamp plate is not good. Most metal pipe fittings use cylindrical strip shapes, and it is not easy to apply force to the curved surface of the clamp plate. The fixing effect is further affected under high-frequency impact, which can cause the metal pipe fitting to fall off during high-frequency impact fatigue testing. Secondly, after the clamp plate fixes the metal pipe fitting, the clamping position cannot be subjected to impact test operation. When bending impact testing is performed, the unclamped direction should be avoided, otherwise the metal pipe fitting will move in the unclamped direction, causing the pipe to fall off. In addition, the metal pipe fitting needs to withstand a large force when impacted, but the force is relative. The impact force received by the metal pipe fitting is as large as the force received by the clamping device in the opposite direction, which can cause the clamping structure to be easily damaged and the maintenance cost to be high.

[0005] 2. The fatigue resistance of metal pipe fittings at different temperatures will be different, which will affect the impact resistance of metal pipe fittings. High temperature can increase the toughness of metal. The increase in metal toughness can reduce the probability of metal pipe fitting rupture due to excessive extrusion force during bending impact testing. However, the metal repeatedly experiences high and low temperatures, which can also affect the fatigue resistance of the metal, causing the metal to become brittle. Therefore, the highest temperature, the lowest temperature, and the maximum temperature difference that the sample can withstand are observed through testing, as well as the impact resistance of the metal pipe fitting at different temperatures. SUMMARY

[0006] The present application aims to provide a high-frequency impact fatigue testing machine to solve the problems raised in the background art.

[0007] The technical scheme of the present application is: a high-frequency impact fatigue testing machine, comprising a machine tool structure, a metal pipe preheating structure is arranged at the top of one side of the machine tool structure, and the metal pipe preheating structure heats and extrudes the metal pipe, a flexible clamping assembly is installed at the middle of one side of the machine tool structure, and a cutting assembly is arranged on the side of the flexible clamping assembly away from the machine tool structure, an impact auxiliary assembly is installed at the bottom of one side of the machine tool structure, and the impact auxiliary assembly and the metal pipe preheating structure cooperate to impact and bend the metal pipe, the metal pipe preheating structure comprises a supporting bottom plate, a heating support is installed on one side of the supporting bottom plate, the heating support is fixed to the top of the supporting bottom plate, a metal pipe original piece is installed on the heating support, and the heating support heats the metal pipe original piece;

[0008] A metal pipe pushing assembly is arranged, the metal pipe pushing assembly comprises a metal fusion device, and the metal fusion device is installed at the bottom of the supporting bottom plate, the discharge end of the metal pipe original piece is connected with the feeding port of the metal fusion device, the flexible clamping assembly comprises an inner supporting plate, a fixed plug is installed at the top of the inner supporting plate, the fixed plug is provided in four groups, an outer connecting ring is arranged on the outer side of the inner supporting plate, and an impact positioning block is installed at the top of the outer connecting ring, and the outer connecting ring rotates to impact and bend the metal pipe.

[0009] Further, the machine tool structure comprises a machine tool bottom plate, a plurality of positioning clamping grooves are arranged at one end of the machine tool bottom plate close to the metal pipe preheating structure, the positioning clamping grooves are T-shaped grooves, fixed side plates are installed at both ends of the machine tool bottom plate away from the metal pipe preheating structure, and through holes are arranged at positions of the machine tool bottom plate close to the flexible clamping assembly.

[0010] Further, an induction heating roller is installed at the discharge end of the heating support, a heating motor is installed at the side of the induction heating roller close to the heating support, the induction heating roller is arranged in a ring shape, a plurality of heating pipes are arranged in a ring shape on the inner side of the induction heating roller, shunt supports are installed in four directions on the outer side of the induction heating roller, the metal pipe original piece is arranged in four groups, the four groups of metal pipe original pieces are in contact with the shunt supports, and the metal pipe original piece enters the feeding end of the metal fusion device after passing through the shunt supports.

[0011] Further, an extrusion outlet is installed at the side of the metal fusion device away from the metal pipe preheating structure, the extrusion outlet extrudes the metal pipe, an injection port is installed at the top of the metal fusion device, and the injection port is used to pour chemical metal fusion agent to assist in uniform fusion of the metal pipe, and a scrap and waste outlet is installed at the side of the extrusion outlet, and the scrap and waste outlet is used to discharge the scrap and waste generated after the fusion of the metal pipe.

[0012] Further, the flexible clamping assembly further comprises telescopic motors, and the telescopic motors are provided in two groups, and the two groups of telescopic motors are respectively installed at the two ends of the side of the through hole away from the metal pipe element preheating structure, the output end of the telescopic motor is connected with a connecting frame, and a connecting plug rod is installed at the middle position of the connecting frame, the connecting plug rod is connected with the inner supporting plate, and the connecting plug rod drives the inner supporting plate to telescopically extend in the outer connecting ring.

[0013] Further, the inside of the through hole is provided with a rotating motor, and the output end of the rotating motor is connected with an outer connecting ring, the surface of the outer connecting ring is provided with a plurality of annularly distributed preset holes, the impact positioning block can be inserted into the preset holes distributed on the surface of the outer connecting ring, the outer connecting ring rotates around the axis of the inner supporting plate, the fixed plug installed on the surface of the inner supporting plate is detachable, and the fixed plug is in the shape of a triangular prism, the sharp part of the fixed plug is chamfered, the metal pipe element after fusion passes through the gap between the four fixed plugs, the impact positioning block is installed on the side of the tail end of the metal pipe element original element, the outer connecting ring drives the impact positioning block to rotate when rotating, and the impact positioning block contacts the metal pipe element.

[0014] Further, the impact auxiliary assembly comprises a limiting sliding sleeve, and a pressure motor is installed at the top end of the limiting sliding sleeve, a telescopic rod is installed at the inside middle position of the limiting sliding sleeve, the output end of the pressure motor is connected with the telescopic rod, the pressure motor drives the telescopic rod to move in the range of the limiting sliding sleeve, the output end of the telescopic rod is connected with a bent head, a first buffer roller is installed on the side close to the metal pipe element workpiece, a second buffer roller is installed on the side of the first buffer roller, and the first buffer roller and the second buffer roller can unload part of the impact force when contacting the metal pipe element workpiece.

[0015] Further, a push rod motor is arranged on one side of the limiting sliding sleeve, and a cutting tool bit is installed on the side close to the metal pipe element workpiece of the push rod motor, and the cutting tool bit is in the shape of a protruding sharp object in the middle.

[0016] Further, a pressure regulator is installed on the other side of the push rod motor, and the pressure regulator adjusts the impact force when cutting the metal pipe element workpiece.

[0017] Further, the cutting assembly comprises a support frame, and a lifting motor is installed at the top end of the support frame, the output end of the lifting motor is connected with a cutting drill bit slot, connecting sliding plates are connected on the two sides of the cutting drill bit slot, limiting sliding rails are installed on the two sides in the inside of the support frame, and the limiting sliding rails and the two sides of the connecting sliding plates are slidingly connected.

[0018] The present application improves the high-frequency impact fatigue testing machine, and has the following improvements and advantages compared with the prior art.

[0019] 1. By putting the metal pipe through the fixed plug, the fixed plug can be fixed while bending the metal pipe through its rotation, and the round triangular shape of the fixed plug and the spherical impact positioning block is more moderate than the sharp corner, which is easier to apply force. In addition, when the impact positioning block bends the pipe, only one set of fixed plug and impact positioning block is stressed, and the round shape can disperse and buffer the pressure received, which is less abrasive and more stable than the clamp plate. The detachable design of the fixed plug and the impact positioning block also facilitates replacement. When used, different models of fixed plugs can be installed according to the size of the metal pipe, and the extrusion outlet always pushes the metal pipe forward during the test, and the metal pipe moves in the gap between the fixed plugs, which facilitates multiple impacts on the same metal pipe and facilitates the testing of test data of the metal pipe under high-frequency impact at multiple angles.

[0020] 2. By preheating the metal pipe element with a heating bracket, the metal pipe element is softened, and the metal pipe element is preheated to test the fatigue resistance of the metal pipe element under a large temperature difference, and the preheating can increase the toughness of the metal, thereby avoiding the rupture of the metal pipe element due to excessive extrusion force when the metal pipe element is stressed during the impact and bending impact. In addition, the metal pipe element is further uniformly heated by the induction heating roller, and then enters the metal fusion device for fusion, and the metal pipe element is fully preheated.

[0021] In addition, the metal fusion device is provided with an induction heating device, which facilitates testing whether the metal pipe element reaches the highest temperature of the metal softening during impact, and adjusts the test temperature near the critical point and the normal room temperature to test the impact of the metal pipe element. The fatigue resistance of the metal pipe element is tested. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further explained in conjunction with the drawings and examples:

[0023] Figure 1 The first perspective view of the present application shows the structure of the fixed plug and the impact positioning block;

[0024] Figure 2 The second perspective view of the present application shows the structure of the fixed plug and the impact positioning block; Figure 1 The enlarged structure diagram of A in the present application;

[0025] Figure 3 The second perspective view of the present application shows the structure of the fixed plug and the impact positioning block;

[0026] Figure 4 The third perspective view of the present application shows the structure of the fixed plug and the impact positioning block;

[0027] Figure 5 The front view of the present application shows the structure of the fixed plug and the impact positioning block;

[0028] Figure 6 The fourth perspective view of the present application shows the structure of the fixed plug and the impact positioning block;

[0029] Figure 7 is a first perspective exploded schematic view of the present application;

[0030] Figure 8 is a second perspective exploded schematic view of the present application;

[0031] Figure 9 is a perspective view of the present application Figure 8 is an enlarged structural schematic view at B in the middle;

[0032] Figure 10 is a third perspective exploded schematic view of the present application;

[0033] Figure 11 is a perspective enlarged schematic view of the cutting assembly of the present application;

[0034] Figure 12 is a perspective enlarged schematic view of the metal pipe preheating structure of the present application;

[0035] Figure 13 is a first perspective enlarged schematic view of the impact assisting assembly of the present application;

[0036] Figure 14 is a second perspective enlarged schematic view of the impact assisting assembly of the present application;

[0037] Figure 15 is a first perspective enlarged schematic view of the flexible clamping assembly of the present application;

[0038] Figure 16 is a second perspective enlarged schematic view of the flexible clamping assembly of the present application;

[0039] Figure 17 is a top view schematic view of the impact positioning block of the present application during the impact bending metal pipe test.

[0040] Explanation of reference signs: 1, machine tool structure; 101, machine tool bottom plate; 102, positioning clamping groove; 103, fixed side plate; 104, through hole; 2, metal pipe preheating structure; 201, supporting bottom plate; 202, metal pipe original piece; 203, heating support; 204, induction heating roller; 205, shunt support; 206, heating motor; 3, metal pipe pushing assembly; 301, metal fusion device; 302, material injection port; 303, scrap waste outlet; 304, extrusion outlet; 4, flexible clamping assembly; 401, telescopic motor; 402, connecting frame; 403, connecting plug rod; 404, inner supporting plate; 405, fixed plug; 406, rotary motor; 407, outer connecting ring; 408, impact positioning block; 5, cutting assembly; 501, support frame; 502, lifting motor; 503, connecting sliding plate; 504, limiting sliding rail; 505, cutting drill bit slot; 6, impact auxiliary assembly; 601, limiting sliding sleeve; 602, bending head; 603, first buffer roller; 604, second buffer roller; 605, push rod motor; 606, cutting bit; 607, pressure regulator; 608, telescopic rod; 609, pressure motor. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings. Figures 1 to 17 The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0042] The present application provides a high-frequency impact fatigue testing machine. Figures 1-17 As shown in the figure, a high-frequency impact fatigue testing machine comprises a machine tool structure 1, the machine tool structure 1 comprises a machine tool bottom plate 101, and the machine tool bottom plate 101 is provided with a plurality of positioning clamping grooves 102 in a T-shaped groove near one end of a metal pipe preheating structure 2.

[0043] The two ends of the machine tool bottom plate 101 away from the metal pipe preheating structure 2 are provided with fixed side plates 103, and the machine tool bottom plate 101 is provided with through holes 104 near the position of the flexible clamping assembly 4.

[0044] The top end of one side of the machine tool structure 1 is provided with the metal pipe preheating structure 2, and the metal pipe preheating structure 2 heats the metal pipe.

[0045] The metal pipe preheating structure 2 comprises a supporting bottom plate 201, and a heating support 203 is arranged on one side of the supporting bottom plate 201, the heating support 203 is fixed to the top of the supporting bottom plate 201, and a metal pipe original piece 202 is arranged on the heating support 203, the metal pipe original piece 202 is preheated through the heating support 203, so as to soften the metal pipe, the metal pipe is preheated to test the fatigue resistance of the metal pipe under a large temperature difference, and the preheating can increase the toughness of the metal, so that the metal pipe is prevented from being broken due to excessive extrusion force when the metal pipe is impacted during the bending and folding, and in addition, the metal pipe original piece 202 is further uniformly heated through an induction heating roller 204, and then enters a metal fusion device 301 for fusion, so that the metal pipe is fully preheated.

[0046] The induction heating roller 204 is arranged at the discharging end of the heating support 203, a heating motor 206 is arranged on the side close to the heating support 203 of the induction heating roller 204, the induction heating roller 204 is annular, and a plurality of groups of heating pipes are annularly arranged on the inner side of the induction heating roller 204.

[0047] The four directions of the outer side of the induction heating roller 204 are provided with shunt supports 205, the metal pipe original piece 202 is provided in four groups, in addition, the metal pipe original piece 202 is further uniformly heated through the induction heating roller 204, and the four groups of metal pipe original pieces 202 are in contact with the shunt supports 205, and the metal pipe original piece 202 enters the feeding end of the metal fusion device 301 after passing through the shunt support 205.

[0048] The metal pipe pushing assembly 3 comprises the metal fusion device 301, and the metal fusion device 301 is arranged at the bottom of the supporting bottom plate 201, the discharging end of the metal pipe original piece 202 is connected with the feeding port of the metal fusion device 301, and then enters the metal fusion device 301 for fusion, in addition, the metal fusion device 301 is internally provided with an induction heating device, so as to test whether the metal pipe reaches the highest temperature of softening when the metal pipe is impacted, and the influence of the impact force on the metal pipe under the temperature close to the critical point and the normal room temperature is adjusted, so as to test the fatigue resistance of the metal pipe.

[0049] The metal fusion device 301 is provided with an extrusion outlet 304 away from the metal pipe preheating structure 2, the extrusion outlet 304 discharges the metal pipe, and then the metal pipe is bent and impacted through the fixed block 405, the extrusion outlet 304 always pushes the metal pipe forward during the test, the metal pipe moves in the gap between the fixed block 405, so as to impact the metal pipe multiple times on the same metal pipe, and the test data of the metal pipe under high-frequency impact at multiple angles is tested.

[0050] Wherein, the top end of the metal fuser 301 is installed with a pouring port 302, other neutralizing metal or chemical agent can be poured from the pouring port 302 to increase the toughness of the metal pipe fitting, and the influence of different chemical coatings on the bending resistance of the metal pipe fitting is tested after being coated on the surface;

[0051] Example 1: Some chemical coatings can improve the hardness and toughness of the metal pipe fitting, for example, epoxy resin coatings or nano-composite coatings. Such coatings can form a dense and strongly adhered protective layer on the surface of the metal pipe fitting, which not only effectively resists external environmental erosion, but also fills the micro-cracks and defects on the metal surface caused by impact testing on the microstructure, enhances the overall structural stability, and when subjected to external bending, these coatings can uniformly disperse stress and reduce local stress concentration, thereby significantly improving the bending resistance and toughness of the metal pipe fitting;

[0052] Example 2: Some chemical coatings will corrode the surface of the metal pipe fitting, for example, strong acid coating treatment agents containing high concentration of sulfuric acid or hydrochloric acid or some coatings containing chloride ions. These corrosive chemicals will react with the metal, destroy the oxidation protective layer on the surface of the metal, and even penetrate into the interior of the metal, causing pitting, intergranular corrosion, etc. During subsequent bending impact testing, these corroded areas are prone to become the starting point of cracks, causing the pipe to break under lower stress, significantly degrading the bending resistance and impact resistance, and the surface of the metal pipe fitting will gradually appear rusting, peeling, micro-crack expansion, etc., shortening the fatigue resistance and mechanical strength of the metal pipe fitting.

[0053] The above test results of the reaction of metal pipe fittings to different chemical coatings further increase the test data of metal pipe fittings under different test samples;

[0054] Wherein, one side of the extrusion outlet 304 is installed with a scrap waste outlet 303, and the scrap waste outlet 303 discharges the scraps and waste generated after the fusion of the metal pipe fitting;

[0055] The flexible clamping assembly 4 is installed in the middle of one side of the machine tool structure 1, wherein the flexible clamping assembly 4 comprises an inner supporting plate 404, and the top end of the inner supporting plate 404 is provided with a fixed plug 405, the fixed plug 405 is provided with four groups, the metal pipe is passed through the fixed plug 405, the fixed plug 405 can be fixed while the metal pipe is bent by the impact test of the rotation of the fixed plug 405, and the round triangular prism shape of the fixed plug 405 and the spherical impact positioning block are more moderate than the sharp corners and are convenient to force, in addition, when the impact positioning block 408 is bent, only one group of the fixed plug 405 and the impact positioning block 408 is stressed, the round shape can disperse and buffer the pressure received, and the wear of the clamp plate is less and more stable; the detachable design of the fixed plug 405 and the impact positioning block 408 is also convenient to replace, and different models of the fixed plug can be installed according to the size of the metal pipe during use, the outer side of the inner supporting plate 404 is provided with an outer connecting ring 407, the top end of the outer connecting ring 407 is provided with an impact positioning block 408, and the outer connecting ring 407 is rotated to drive the impact positioning block 408 to impact and bend the metal pipe;

[0056] The flexible clamping assembly 4 further comprises two groups of telescopic motors 401, and the two groups of telescopic motors 401 are respectively installed at two ends of the side of the through hole 104 away from the metal pipe preheating structure 2;

[0057] The output end of the telescopic motor 401 is connected with a connecting frame 402, and the middle position of the connecting frame 402 is provided with a connecting plug rod 403;

[0058] The connecting plug rod 403 is connected with the inner supporting plate 404, and the connecting plug rod 403 drives the inner supporting plate 404 to stretch and contract in the outer connecting ring 407;

[0059] The inside of the through hole 104 is penetrated by a rotating motor 406, and the output end of the rotating motor 406 is connected with the outer connecting ring 407;

[0060] The surface of the outer connecting ring 407 is provided with a plurality of groups of annularly distributed preset holes, the impact positioning block 408 can be inserted into the preset holes distributed on the surface of the outer connecting ring 407, and the outer connecting ring 407 rotates around the axis of the inner supporting plate 404;

[0061] The fixed plug 405 mounted on the surface of the inner supporting plate 404 is detachable, and the fixed plug 405 is in the shape of a triangular prism, the sharp part of the fixed plug 405 is chamfered, the round triangular prism shape of the fixed plug 405 and the spherical shape of the impact positioning block 408 are convenient to force when contacting the metal pipe; in addition, when the impact positioning block 408 is bent, only one group of the fixed plug 405 and the impact positioning block 408 is stressed, and the wear of the clamp plate is less, and the detachable design of the fixed plug 405 and the impact positioning block 408 is also convenient to replace;

[0062] Wherein, the metal pipe element 202 fusion after the metal pipe element through four sets of fixed block 405 between the gap, impact positioning block 408 is installed at the tail end of one side of the metal pipe element 202, the outer connecting ring 407 rotation when driving impact positioning block 408 rotation, and impact positioning block 408 and metal pipe contact; In addition, the extrusion outlet 304 is always pushed forward during the test, the metal pipe element in the gap between the fixed block 405 moves, which is convenient for bending impact on the same metal pipe element several times;

[0063] And the flexible clamping assembly 4 away from the side of the machine tool structure 1 is provided with cutting assembly 5;

[0064] Cutting assembly 5 includes support frame 501, and the top end of support frame 501 is installed with lifting motor 502, the output end of lifting motor 502 is connected with cutting drill bit slot 505, cutting drill bit slot 505 is pushed to the direction of metal pipe element by starting lifting motor 502, which can further cut the metal pipe element from other directions, so as to cut after the test of metal pipe element, cutting drill bit slot 505 can install different cutting drill bit, cutting drill bit is easy to wear, and is convenient to replace;

[0065] Wherein, the two sides of cutting drill bit slot 505 are connected with connecting slide plate 503, the two sides of support frame 501 inside are installed with limiting slide rail 504, and the two sides of limiting slide rail 504 and connecting slide plate 503 are slidingly connected;

[0066] The bottom end of one side of machine tool structure 1 is installed with impact auxiliary assembly 6;

[0067] Impact auxiliary assembly 6 includes limiting sliding sleeve 601, and the top end of limiting sliding sleeve 601 is installed with pressure motor 609;

[0068] Wherein, the inside of limiting sliding sleeve 601 is installed with telescopic rod 608 at the middle position, the output end of pressure motor 609 is connected with telescopic rod 608, and pressure motor 609 drives telescopic rod 608 to move within the range of limiting sliding sleeve 601;

[0069] The output end of the telescopic rod 608 is connected with the bending head 602. The bending head 602 is pushed to move towards the metal pipe by the pressure motor 609, so as to facilitate auxiliary impact bending of the metal pipe, and the metal pipe can be tested in more directions. The first buffer roller 603 is installed on the side of the bending head 602 close to the metal pipe workpiece, and the second buffer roller 604 is installed on the side of the first buffer roller 603. When the first buffer roller 603 and the second buffer roller 604 contact the metal pipe workpiece, part of the impact force can be unloaded. The design of the first buffer roller 603 and the second buffer roller 604 rolling wheels makes the first buffer roller 603 and the second buffer roller 604 roll when they contact the metal pipe for the first time, and then the force is continuously output to support it. This step unloads the burst force generated when the motor starts, so that the force pushed by the bending head 602 is more stable and uniform.

[0070] The push rod motor 605 is installed on one side of the limiting sliding sleeve 601, and the cutting tool bit 606 is installed on the side of the push rod motor 605 close to the metal pipe workpiece.

[0071] The cutting tool bit 606 has a sharp shape with a protruding middle. The cutting tool bit 606 is pushed towards the metal pipe by the push rod motor 605, so as to cut the metal pipe that has been tested, thereby completing the test of the metal pipe.

[0072] The push rod motor 605 is installed on the other side of the push rod motor 605, and the pressure regulator 607 is installed on the other side of the push rod motor 605. The pressure regulator 607 adjusts the impact force when cutting the metal pipe workpiece. The content and hardness of the metal inside the metal pipe are different, and the pressure regulator 607 can be adjusted according to the difference to adjust the speed and force of the push rod motor 605.

[0073] The impact auxiliary assembly 6 and the metal pipe preheating structure 2 cooperate to impact and bend the metal pipe.

[0074] Working principle: first, the metal pipe is inserted through the fixed plug 405, and then the impact positioning block 408 is moved by rotating the outer connecting ring 407 to impact and bend the metal pipe. In addition, the fixed plug 405 on both sides of the metal pipe can clamp the metal pipe. The fixed plug 405 can be installed with different types of fixed plug 405 according to the size of the metal pipe, and the fixed plug 405 can fix the metal pipe. The chamfered triangular prism shape of the fixed plug 405 and the spherical shape of the impact positioning block 408 facilitate force application. When the impact positioning block 408 bends the pipe, only one set of fixed plug 405 and impact positioning block 408 is stressed, which is less than the wear of the clamp plate. The fixed plug 405 and the impact positioning block 408 can be disassembled and replaced.

[0075] In addition, the extrusion outlet 304 pushes the metal pipe forward during the test, and the metal pipe moves in the gap between the fixed plugs 405, facilitating multiple bending of the metal pipe and facilitating the test of the experimental data of the metal pipe under high-frequency impact at multiple angles.

[0076] Then, the metal pipe element 202 is preheated by heating the support 203, which softens the metal pipe. The preheating of the metal pipe is to test the fatigue resistance of the metal pipe under a large temperature difference, and the preheating can increase the toughness of the metal. In addition, the metal pipe element 202 is further uniformly heated by the induction heating roller 204, and then enters the metal fusion device 301 for fusion. According to the test standard of different chemical coatings, different coatings of the metal pipe are obtained by pouring metal or chemical agents from the pouring port 302.

[0077] In addition, the metal fusion device 301 is provided with an induction heating device inside, which is convenient for testing whether the metal pipe reaches the highest temperature of softening during impact. By adjusting the test temperature near the critical point and the normal room temperature, the impact force of the metal pipe is tested, so as to test the fatigue resistance of the metal pipe.

[0078] Finally, in addition, the bending head 602 is pushed towards the metal pipe by the pressure motor 609, which facilitates auxiliary impact bending of the metal pipe, and more directions of the metal pipe can be tested. The design of the first buffer roller 603 and the second buffer roller 604 makes the first buffer roller 603 and the second buffer roller 604 roll when they first contact the metal pipe, and then the force behind is continuously output to stop. This step facilitates the removal of the burst force generated when the motor starts, so that the force pushed by the bending head 602 is more stable and uniform. In addition, the cutting bit 606 is pushed towards the metal pipe by the push rod motor 605, which facilitates cutting of the metal pipe that has been tested, so as to complete a metal pipe. The content and hardness of the metal inside the metal pipe are different, and the pressure regulator 607 can be adjusted according to the difference to adjust the speed and intensity of the impact of the push rod motor 605.

[0079] In addition, the cutting drill bit slot 505 is pushed towards the metal pipe by starting the lifting motor 502, which can further cut the metal pipe from other directions. The cutting drill bit slot 505 can be installed with different cutting drill bits, and the cutting drill bit is easy to wear and replaceable.

[0080] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-frequency impact fatigue testing machine, comprising a machine tool structure (1), characterized in that: The top of one side of the machine tool structure (1) is provided with a metal pipe preheating structure (2), and the metal pipe preheating structure (2) heats the metal pipe. A flexible clamping component (4) is installed in the middle of one side of the machine tool structure (1), and a cutting component (5) is provided on the side of the flexible clamping component (4) away from the machine tool structure (1). An impact auxiliary component (6) is installed at the bottom of one side of the machine tool structure (1), and the impact auxiliary component (6) and the metal pipe preheating structure (2) work together to impact the metal pipe. The metal pipe preheating structure (2) includes a supporting base plate (201), and a heating bracket (203) is installed on one side of the supporting base plate (201). The heating bracket (203) is fixed to the top of the supporting base plate (201), and a metal pipe component (202) is installed on the heating bracket (203). The heating bracket (203) heats the metal pipe component (202). Metal pipe push assembly (3), the metal pipe push assembly (3) includes a metal fusion device (301), and the metal fusion device (301) is installed at the bottom of the support base plate (201), and the discharge end of the metal pipe component (202) is connected to the inlet of the metal fusion device (301); The flexible clamping assembly (4) includes an inner support plate (404), and a fixing block (405) is installed on the top of the inner support plate (404). The fixing block (405) is provided in four sets. An outer connecting ring (407) is sleeved on the outer side of the inner support plate (404), and an impact positioning block (408) is installed on the top of the outer connecting ring (407). The outer connecting ring (407) rotates and impacts to bend the metal pipe. The metal pipe fitting (202) is fused together and then passes through the gap between four sets of fixed blocks (405). The impact positioning block (408) is installed on one side of the tail end of the metal pipe fitting (202). When the outer connecting ring (407) rotates, it drives the impact positioning block (408) to rotate, and the impact positioning block (408) contacts the metal pipe fitting.

2. The high-frequency impact fatigue testing machine according to claim 1, characterized in that: The machine tool structure (1) includes a machine tool base plate (101), and the machine tool base plate (101) is provided with multiple sets of positioning slots (102) at one end near the metal pipe preheating structure (2), and the positioning slots (102) are T-shaped grooves; Among them, the machine tool base plate (101) has fixed side plates (103) installed at both ends on the side away from the metal pipe preheating structure (2), and the machine tool base plate (101) has a through hole (104) near the flexible clamping assembly (4).

3. The high-frequency impact fatigue testing machine according to claim 1, characterized in that: The discharge end of the heating bracket (203) is equipped with an induction heating roller (204), and a heating motor (206) is installed on the side of the induction heating roller (204) close to the heating bracket (203). The induction heating roller (204) is designed as a ring, and multiple sets of heating tubes are distributed in a ring on the inner side of the induction heating roller (204). Among them, the induction heating roller (204) is equipped with a diversion bracket (205) in four directions on the outside. The metal pipe component (202) is set into four groups, and the four groups of metal pipe components (202) are in contact with the diversion bracket (205). The metal pipe component (202) enters the feed end of the metal fusion machine (301) after passing through the diversion bracket (205).

4. The high-frequency impact fatigue testing machine according to claim 1, characterized in that: The metal fusion device (301) has an extrusion outlet (304) installed on the side away from the metal pipe preheating structure (2), and the extrusion outlet (304) extrudes the metal pipe. The metal fusion device (301) is equipped with a filling port (302) at its top, and a chemical metal fusion agent is injected through the filling port (302) to assist in the uniform fusion of the metal pipes. The extrusion outlet (304) is equipped with a waste material outlet (303) on one side, and the waste material outlet (303) discharges the debris and waste generated after the fused metal pipe fitting.

5. A high-frequency impact fatigue testing machine according to claim 2, characterized in that: The flexible clamping assembly (4) also includes a telescopic motor (401), and the telescopic motor (401) is provided in two sets. The two sets of telescopic motors (401) are respectively installed at both ends of the side of the through hole (104) away from the metal pipe preheating structure (2). The output end of the telescopic motor (401) is connected to a connecting frame (402), and a connecting rod (403) is installed at the middle position of the connecting frame (402). The connecting rod (403) is connected to the inner support plate (404), and the connecting rod (403) drives the inner support plate (404) to extend and retract inside the outer connecting ring (407).

6. A high-frequency impact fatigue testing machine according to claim 5, characterized in that: The through hole (104) has a rotary motor (406) passing through its interior, and the output end of the rotary motor (406) is connected to an outer connecting ring (407). The outer connecting ring (407) has multiple sets of pre-set holes arranged in annular pattern on its surface. The impact positioning block (408) can be inserted into the pre-set holes arranged in the surface of the outer connecting ring (407). The outer connecting ring (407) rotates around the axis of the inner support plate (404). The fixing block (405) installed on the surface of the inner support plate (404) is detachable, and the fixing block (405) is in the shape of a triangular prism, with the sharp part of the fixing block (405) being chamfered.

7. A high-frequency impact fatigue testing machine according to claim 1, characterized in that: The impact assist component (6) includes a limiting sleeve (601), and a pressure motor (609) is installed at the top of the limiting sleeve (601). The limiting sleeve (601) has a telescopic rod (608) installed in the middle of its interior. The output end of the pressure motor (609) is connected to the telescopic rod (608). The pressure motor (609) drives the telescopic rod (608) to move within the range of the limiting sleeve (601). The output end of the telescopic rod (608) is connected to a bending head (602), and a first buffer roller (603) is installed on the side of the bending head (602) close to the metal pipe workpiece. A second buffer roller (604) is installed on the side of the first buffer roller (603). When the first buffer roller (603) and the second buffer roller (604) come into contact with the metal pipe workpiece, part of the impact force can be dissipated.

8. A high-frequency impact fatigue testing machine according to claim 7, characterized in that: The limiting sleeve (601) is provided with a push rod motor (605) on one side, and a cutting head (606) is installed on the side of the push rod motor (605) close to the metal pipe workpiece. The cutting head (606) has a sharp shape with a central protrusion.

9. A high-frequency impact fatigue testing machine according to claim 8, characterized in that: A pressure regulator (607) is installed on the other side of the push rod motor (605), and the pressure regulator (607) adjusts the impact force when cutting metal pipe workpieces.

10. A high-frequency impact fatigue testing machine according to claim 1, characterized in that: The cutting assembly (5) includes a support frame (501), and a lifting motor (502) is installed at the top of the support frame (501). The output end of the lifting motor (502) is connected to a cutting drill slot (505). The cutting drill slot (505) is connected to the two sides of the connecting slide plate (503), and the two sides of the support frame (501) are equipped with limiting slide rails (504), and the limiting slide rails (504) and the two sides of the connecting slide plate (503) are slidably connected.

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