High-frequency impact fatigue testing machine

Abstract

The invention discloses a high-frequency impact fatigue testing machine, relates to the field of metal impact tests.The high-frequency impact fatigue testing machine solves the problem that a fixed clamping plate affects the flexibility of a metal pipe fitting when the metal pipe fitting is impacted, and comprises a machine tool structure, and a metal pipe fitting preheating structure is arranged at the top end of one side of the machine tool structure; a flexible clamping assembly is installed in the middle of one side of the machine tool structure and comprises an inner bearing plate, four sets of fixed blocking blocks are installed at the top end of the inner bearing plate, the outer side of the inner bearing plate is sleeved with an outer connecting ring, an impact positioning block is installed at the top end of the outer connecting ring, and the outer connecting ring rotates to impact and bend the metal pipe fitting. The device has the beneficial effects that the metal pipe penetrates through the fixed blocking block and the outer connecting ring to drive the impact positioning block to rotate, so that the metal pipe is impacted and bent, the same metal pipe can be impacted for multiple times, and then experimental data of the metal pipe under high-frequency impact can be tested.

Description

Technical Field

[0001] This invention relates to the field of metal impact testing, specifically a high-frequency impact fatigue testing machine. Background Technology

[0002] Metal pipe fittings are an important type of semi-finished metal products. Metal pipe fittings include rolled pipes, extruded pipes, drawn pipes, and pipes produced by combination. Welded pipes include welded pipes and welded rolled pipes. Because metal pipe fittings are long and strip-shaped, they are subject to lateral extrusion forces that cause bending during use. This device is designed for fatigue testing of metal pipe fittings under high-frequency impact.

[0003] Existing metal pipe fittings based on positioning and clamping thermoforming equipment for metal pipe profiles and other metal pipe fittings have the following drawbacks in practical use:

[0004] 1. Metal pipe fittings need to be fixed with clamps during testing. However, the clamping effect of the clamps is not good. Most metal pipe fittings are cylindrical or strip-shaped, and clamps are not easy to apply force to curved surfaces. Under high-frequency impact, the fixing effect will be further affected, which will lead to the metal pipe fittings easily falling off during high-frequency impact fatigue tests. Secondly, after the metal pipe fittings are fixed with clamps, the clamped position cannot be used for impact testing. When conducting bending impact tests, the direction of non-clamping must be avoided, otherwise the metal pipe fittings will move in the non-clamped direction, causing the pipes to fall off. In addition, metal pipe fittings need to withstand a large force when impacted, but force is relative. The greater the impact force on the metal pipe fittings, the greater the reverse force on the clamping equipment, which makes the clamping structure easy to damage and the maintenance cost high.

[0005] 2. The fatigue resistance of metal pipes varies at different temperatures, which in turn affects their impact resistance. High temperatures can increase the toughness of metals, and increased toughness can reduce the probability of metal pipes breaking due to excessive compressive force during bending impact tests. However, repeated exposure to high and low temperatures can also affect the fatigue resistance of metals, causing them to become brittle. Therefore, it is necessary to observe through experiments the highest and lowest temperatures that the sample can withstand, the maximum number of temperature changes it can endure, and the impact resistance of metal pipes at different temperatures. Summary of the Invention

[0006] The purpose of this invention is to provide a high-frequency impact fatigue testing machine to solve the problems mentioned in the background art.

[0007] The technical solution of the present invention is: a high-frequency impact fatigue testing machine, comprising a machine tool structure, a metal tube preheating structure provided at the top of one side of the machine tool structure, wherein the metal tube preheating structure heats and extrudes the metal tube, a flexible clamping component is installed in the middle of one side of the machine tool structure, and a cutting component is provided on the side of the flexible clamping component away from the machine tool structure, an impact auxiliary component is installed at the bottom of one side of the machine tool structure, and the impact auxiliary component and the metal tube preheating structure cooperate to impact and bend the metal tube, the metal tube preheating structure includes a supporting base plate, and a heating bracket is installed on one side of the supporting base plate, the heating bracket is fixed to the top of the supporting base plate, and a metal tube component is installed on the heating bracket, wherein the heating bracket heats the metal tube component.

[0008] A metal pipe pushing assembly includes a metal fusion device installed at the bottom of a supporting base plate. The discharge end of the original metal pipe is connected to the inlet of the metal fusion device. A flexible clamping assembly includes an inner support plate with a fixing block installed at the top of the inner support plate. Four sets of fixing blocks are provided. An outer connecting ring is sleeved on the outer side of the inner support plate, and an impact positioning block is installed at the top of the outer connecting ring. The outer connecting ring rotates to impact and bend the metal pipe.

[0009] Furthermore, the machine tool structure includes a machine tool base plate, and the end of the machine tool base plate near the metal pipe preheating structure is provided with multiple sets of positioning slots, and the positioning slots are T-shaped grooves. Fixed side plates are installed at both ends of the side of the machine tool base plate away from the metal pipe preheating structure, and a through hole is provided at the position of the machine tool base plate near the flexible clamping assembly.

[0010] Furthermore, an induction heating roller is installed at the discharge end of the heating bracket, and a heating motor is installed on the side of the induction heating roller close to the heating bracket. The induction heating roller is designed to be annular, and multiple sets of heating tubes are distributed annularly on the inner side of the induction heating roller. Diverting brackets are installed in four directions on the outer side of the induction heating roller. The metal pipe components are designed to be in four groups, and the four groups of metal pipe components are in contact with the diverting brackets. The metal pipe components enter the feed end of the metal fusion device after passing through the diverting brackets.

[0011] Furthermore, the metal fusion device is equipped with an extrusion outlet on the side away from the metal pipe preheating structure, through which the metal pipe is extruded. The top of the metal fusion device is equipped with a filling port, through which a chemical metal fusion agent is added to assist in the uniform fusion of the metal pipe. A waste discharge outlet is installed on one side of the extrusion outlet, through which the waste discharge outlet discharges the waste and debris generated after the fusion of the metal pipe.

[0012] Furthermore, the flexible clamping assembly also includes a telescopic motor, and there are two sets of telescopic motors. The two sets of telescopic motors are respectively installed at both ends on the side away from the metal pipe preheating structure of the through hole. The output end of the telescopic motor is connected to a connecting frame, and a connecting rod is installed at the middle position of the connecting frame. The connecting rod is connected to the inner support plate, and the connecting rod drives the inner support plate to extend and retract inside the outer connecting ring.

[0013] Furthermore, a rotary motor passes through the interior of the through hole, and the output end of the rotary motor is connected to an outer connecting ring. The surface of the outer connecting ring is provided with multiple sets of pre-set holes distributed in annularly. The impact positioning block can be inserted into the pre-set holes distributed on the surface of the outer connecting ring. The outer connecting ring rotates around the axis of the inner support plate. The fixing block installed on the surface of the inner support plate is detachable and is in the shape of a triangular prism. The sharp part of the fixing block is chamfered. The metal pipe after the metal pipe component is fused passes through the gap between the four sets of fixing blocks. The impact positioning block is installed on one side of the tail end of the metal pipe component. When the outer connecting ring rotates, it drives the impact positioning block to rotate, and the impact positioning block contacts the metal pipe component.

[0014] Furthermore, the impact assist component includes a limiting sleeve, and a pressure motor is installed at the top of the limiting sleeve. A telescopic rod is installed at the middle position inside the limiting sleeve. The output end of the pressure motor is connected to the telescopic rod. The pressure motor drives the telescopic rod to move within the range of the limiting sleeve. The output end of the telescopic rod is connected to a bending head. A first buffer roller is installed on the side of the bending head near the metal pipe workpiece, and a second buffer roller is installed on one side of the first buffer roller. When the first and second buffer rollers come into contact with the metal pipe workpiece, they can dissipate part of the impact force.

[0015] Furthermore, a push rod motor is provided on one side of the limiting sleeve, and a cutting head is installed on the side of the push rod motor near the metal tube workpiece. The cutting head has a sharp shape with a convex center.

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

[0017] Furthermore, the cutting assembly includes a support frame, and a lifting motor is installed at the top of the support frame. The output end of the lifting motor is connected to a cutting drill bit slot. Connecting slide plates are connected to both sides of the cutting drill bit slot. Limiting slide rails are installed on both sides inside the support frame, and the limiting slide rails and the connecting slide plates are slidably connected.

[0018] This invention provides a high-frequency impact fatigue testing machine with the following improvements and advantages compared to the prior art:

[0019] 1. By passing the metal pipe through the fixed block, the fixed block can perform a bending impact test on the metal pipe through its own rotation while fixing the metal pipe. The rounded triangular prism shape of the fixed block and the spherical shape of the impact positioning block are gentler and easier to apply force compared to sharp corners. In addition, when the impact positioning block bends the pipe, only one set of fixed blocks and impact positioning blocks are subjected to force. The rounded shape will disperse and buffer the pressure, resulting in less wear and more stability compared to clamps. The detachable design of the fixed block and impact positioning block also makes it easy to replace. During use, different models of fixed blocks can be installed according to the size of the metal pipe. During the test, the extrusion outlet continuously pushes the metal pipe forward, and the metal pipe moves in the gap between the fixed blocks, which is conducive to multiple impacts on the same metal pipe, making it easy to test the test data of the metal pipe under high-frequency impacts at multiple angles.

[0020] 2. The metal pipe is preheated by a heating bracket to soften it. Preheating is used to test the metal pipe's fatigue resistance under large temperature differences and to increase its toughness, thus preventing the metal pipe from breaking due to excessive pressure during bending and impact. In addition, the metal pipe is further heated evenly by induction heating rollers before entering the metal fusion machine for fusion, ensuring that the metal pipe is fully preheated.

[0021] In addition, the metal fusion chamber is equipped with an induction heating device, which is convenient for testing whether the metal pipe reaches the maximum temperature at which the metal softens when impacted. By adjusting the test to test the impact force on the metal pipe at temperatures close to the critical point and at normal room temperature, the fatigue resistance of the metal pipe can be tested. Attached Figure Description

[0022] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a schematic diagram of the first three-dimensional appearance structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0025] Figure 3 This is a schematic diagram of the second three-dimensional appearance structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the third three-dimensional appearance structure of the present invention;

[0027] Figure 5 This is a front view schematic diagram of the present invention;

[0028] Figure 6 This is a schematic diagram of the fourth three-dimensional appearance structure of the present invention;

[0029] Figure 7 This is a first three-dimensional exploded view of the present invention;

[0030] Figure 8 This is a second three-dimensional explosion diagram of the present invention;

[0031] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point B;

[0032] Figure 10 This is a third three-dimensional explosion diagram of the present invention;

[0033] Figure 11 This is a three-dimensional enlarged schematic diagram of the cutting component of the present invention;

[0034] Figure 12 This is a three-dimensional enlarged schematic diagram of the metal pipe preheating structure of the present invention;

[0035] Figure 13 This is a first three-dimensional enlarged schematic diagram of the impact assist component of the present invention;

[0036] Figure 14 This is a second enlarged perspective view of the impact assist component of the present invention;

[0037] Figure 15 This is a first three-dimensional enlarged schematic diagram of the flexible clamping component of the present invention;

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

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

[0040] Explanation of reference numerals in the attached drawings: 1. Machine tool structure; 101. Machine tool base plate; 102. Positioning slot; 103. Fixed side plate; 104. Through hole; 2. Metal pipe preheating structure; 201. Support base plate; 202. Metal pipe component; 203. Heating bracket; 204. Induction heating roller; 205. Diverting bracket; 206. Heating motor; 3. Metal pipe pushing assembly; 301. Metal fusion device; 302. Injection port; 303. Waste and debris outlet; 304. Extrusion outlet; 4. Flexible clamping assembly; 401. Telescopic motor; 402. Connecting frame; 403. 404. Connecting rod; 405. Inner support plate; 406. Fixing block; 407. Rotary motor; 408. Outer connecting ring; 409. Impact positioning block; 500. Cutting assembly; 501. Support frame; 502. Lifting motor; 503. Connecting slide plate; 504. Limiting slide rail; 505. Cutting drill bit slot; 600. Impact auxiliary assembly; 601. Limiting slide sleeve; 602. Bending head; 603. First buffer roller; 604. Second buffer roller; 605. Push rod motor; 606. Cutting head; 607. Pressure regulator; 608. Telescopic rod; 609. Pressure motor. Detailed Implementation

[0041] The following will be combined with the appendix Figures 1 to 17 This invention will be described in detail, and the technical solutions in the embodiments of this invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0042] This invention provides, through improvements, a high-frequency impact fatigue testing machine, such as... Figure 1-17 As shown, a high-frequency impact fatigue testing machine includes a machine tool structure 1, which includes a machine tool base plate 101. 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.

[0043] Among them, fixed side plates 103 are installed at both ends of the machine tool base plate 101 away from the metal pipe preheating structure 2, and a through hole 104 is provided in the machine tool base plate 101 near the flexible clamping assembly 4.

[0044] 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.

[0045] 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 metal pipe component 202 is preheated by the heating bracket 203 to soften the metal pipe. The preheating of the metal pipe is to test the fatigue resistance of the metal pipe under a large temperature difference. Preheating can also increase the toughness of the metal, thereby avoiding excessive extrusion pressure on the metal pipe during punching, bending and impact, which could lead to the breakage of the metal pipe. In addition, the metal pipe component 202 is further uniformly heated by the induction heating roller 204 before entering the metal fusion machine 301 for fusion, thus fully preheating the metal pipe.

[0046] An induction heating roller 204 is installed at the discharge end of the heating bracket 203, 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 to be annular, and multiple sets of heating tubes are distributed annularly on the inner side of the induction heating roller 204.

[0047] 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. In addition, the metal pipe component 202 is further heated evenly by the induction heating roller 204. The four groups of metal pipe components 202 are in contact with the diversion bracket 205. After passing through the diversion bracket 205, the metal pipe component 202 enters the feed end of the metal fusion machine 301.

[0048] The metal pipe pushing assembly 3 includes a metal fusion unit 301, which is installed at the bottom of the supporting base plate 201. The discharge end of the metal pipe component 202 is connected to the inlet of the metal fusion unit 301, and then enters the metal fusion unit 301 for fusion. In addition, the metal fusion unit 301 is equipped with an induction heating device to facilitate testing whether the metal pipe component reaches the maximum temperature for softening when impacted. By adjusting the test to test the impact force on the metal pipe component at temperatures close to the critical point and at normal room temperature, the fatigue resistance of the metal pipe component can be tested.

[0049] The metal fusion device 301 has an extrusion outlet 304 installed on the side away from the metal pipe preheating structure 2. The extrusion outlet 304 discharges the metal pipe, which then passes through the fixed block 405 to bend and impact the raw material of the metal pipe. During the test, the extrusion outlet 304 continuously pushes the metal pipe forward, and the metal pipe moves in the gap in the middle of the fixed block 405, which facilitates multiple impacts on the same metal pipe and makes it easy to test the test data of the metal pipe under high-frequency impacts at multiple angles.

[0050] Among them, the top of the metal fusion device 301 is equipped with a filling port 302, which can be used to add other neutral metals or chemical agents to increase the toughness of the metal pipe and test the effect of applying different chemical coatings on the bending resistance of the metal pipe.

[0051] Example 1: Some chemical coatings can improve the hardness and toughness of metal pipe fittings. For example, epoxy resin coatings or nanocomposite coatings can form a dense and strongly adhesive protective layer on the surface of metal pipe fittings. This not only effectively resists the corrosion of the external environment, but also fills the microcracks and defects on the metal surface caused by impact tests in the microstructure, enhancing its overall structural stability. Moreover, when subjected to external bending force, these coatings can evenly disperse stress and reduce local stress concentration, thereby significantly improving the bending resistance and toughness of metal pipe fittings.

[0052] Example 2: Some chemical coatings can corrode the surface of metal pipes. For example, strong acid coatings containing high concentrations of sulfuric acid or hydrochloric acid, or certain coatings containing chloride ions. These corrosive chemicals react with the metal, destroying the protective oxide layer on the metal surface and even penetrating into the metal, causing pitting corrosion, intergranular corrosion, and other phenomena. During subsequent bending and impact tests, these corroded areas are prone to becoming crack initiation points, causing the pipe to fracture under relatively low stress. The bending and impact resistance is significantly degraded, and the surface of the metal pipe will gradually show problems such as rust, peeling, and microcrack propagation, shortening the fatigue resistance and mechanical strength of the metal pipe.

[0053] The above test results, which recorded the reaction of metal pipe fittings with different chemical coatings, will further increase the test data of metal pipe fittings under different test samples;

[0054] Among them, a scrap and waste outlet 303 is installed on one side of the extrusion outlet 304, and the scrap and waste outlet 303 discharges the scrap and waste generated after the fused metal pipe fitting;

[0055] A flexible clamping assembly 4 is installed in the middle of one side of the machine tool structure 1. The flexible clamping assembly 4 includes an inner support plate 404, and a fixing block 405 is installed at the top of the inner support plate 404. There are four sets of fixing blocks 405. The metal pipe is passed through the fixing block 405. The fixing block 405 can fix the metal pipe and perform a bending impact test on the metal pipe by rotating itself. The rounded triangular prism shape of the fixing block 405 and the spherical impact positioning block shape are gentler and easier to apply force than sharp corners. In addition, when rotating the impact positioning block 405... When bending the pipe fitting, only one set of fixed block 405 and impact positioning block 408 bears the force. The rounded shape will disperse and buffer the pressure, resulting in less wear and greater stability compared to clamps. The detachable design of fixed block 405 and impact positioning block 408 also makes it easy to replace. Different models of fixed blocks can be installed according to the size of the metal pipe fitting. An outer connecting ring 407 is sleeved on the outer side of the inner support plate 404. The top of the outer connecting ring 407 is equipped with an impact positioning block 408. Rotating the outer connecting ring 407 can drive the impact positioning block 408 to impact and bend the metal pipe fitting.

[0056] The flexible clamping assembly 4 also includes a telescopic motor 401, and there are two sets of telescopic motors 401. The two sets of telescopic motors 401 are respectively installed at both ends of the through hole 104 away from the metal pipe preheating structure 2.

[0057] 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.

[0058] Among them, 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.

[0059] A rotary motor 406 passes through the interior of the through hole 104, and an outer connecting ring 407 is connected to the output end of the rotary motor 406;

[0060] Among them, the surface of the outer connecting ring 407 is provided with multiple sets of pre-set holes distributed in an annular pattern, and the impact positioning block 408 can be inserted into the pre-set holes distributed on the surface of the outer connecting ring 407. The outer connecting ring 407 rotates around the axis of the inner support plate 404.

[0061] The fixing block 405 installed on the surface of the inner support plate 404 is detachable and is triangular prism in shape. The sharp part of the fixing block 405 is chamfered. The chamfered triangular prism shape of the fixing block 405 and the spherical impact positioning block 408 facilitate the application of force when they contact the metal pipe. In addition, when the impact positioning block 408 bends the pipe, only one set of fixing blocks 405 and impact positioning block 408 is subjected to force, which is less than the number of parts worn by the clamping plate. The detachable design of fixing blocks 405 and impact positioning block 408 also makes them easy to replace.

[0062] The metal pipe component 202, after being fused, 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 component 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 component. In addition, during the test, the extrusion outlet 304 continuously pushes the metal pipe forward, and the metal pipe component moves in the gap between the fixed blocks 405, which facilitates multiple bending and impacts on the same metal pipe component.

[0063] Furthermore, a cutting component 5 is provided on the side of the flexible clamping component 4 that is away from the machine tool structure 1;

[0064] 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. By starting the lifting motor 502, the cutting drill slot 505 is pushed towards the metal pipe, which can further cut the metal pipe from other directions. Thus, the metal pipe is cut after the test is completed. Different cutting drills can be installed in the cutting drill slot 505. The cutting drills are easy to wear and easy to replace.

[0065] The cutting drill slot 505 is connected to two sides by a connecting slide plate 503, and the support frame 501 is installed on both sides by a limiting slide rail 504, which is slidably connected to both sides of the connecting slide plate 503.

[0066] An impact assist component 6 is installed at the bottom of one side of the machine tool structure 1;

[0067] The impact assist component 6 includes a limiting sleeve 601, and a pressure motor 609 is mounted on the top of the limiting sleeve 601;

[0068] Among them, a telescopic rod 608 is installed in the middle position of the inner side of the limiting sleeve 601, and 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.

[0069] The output end of the telescopic rod 608 is connected to a bending head 602. The bending head 602 is pushed towards the metal pipe by the pressure motor 609, which facilitates the impact bending of the metal pipe and allows for testing of the metal pipe in more directions. A first buffer roller 603 is installed on the side of the bending head 602 closest to the metal pipe workpiece, and 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, they can dissipate part of the impact force. The design of the rollers of the first buffer roller 603 and the second buffer roller 604 is such that the first buffer roller 603 and the second buffer roller 604 will roll when they first come into contact with the metal pipe, and then the subsequent force will continue to be output to hold it up. This step helps to dissipate the explosive force generated when the motor starts, making the force pushed out by the bending head 602 more stable and uniform.

[0070] A push rod motor 605 is provided on one side of the limiting sleeve 601, and a cutting head 606 is installed on the side of the push rod motor 605 close to the metal tube workpiece.

[0071] The cutting head 606 has a sharp shape with a raised center. The cutting head 606 is pushed towards the metal tube by the push rod motor 605 to facilitate cutting the metal tube that has been tested, thereby completing the test of a metal tube.

[0072] A 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 metal pipe workpieces. The metal content inside the metal pipe is different and the hardness is different. The pressure regulator 607 can be adjusted according to the difference to adjust the impact speed and force of the push rod motor 605.

[0073] Furthermore, the impact auxiliary component 6 and the metal pipe preheating structure 2 work together to impact-bend the metal pipe.

[0074] Working principle: First, the metal pipe is passed through the fixed block 405. Then, the outer connecting ring 407 rotates, causing the impact positioning block 408 to move, thus impacting and bending the metal pipe. In addition, the fixed blocks 405 on both sides of the metal pipe can clamp the metal pipe. Different models of fixed blocks 405 can be installed according to the size of the metal pipe. The fixed blocks 405 can fix the metal pipe. The chamfered triangular prism shape of the fixed block 405 and the spherical shape of the impact positioning block 408 make it easy to apply force to the metal pipe. When the impact positioning block 408 bends the pipe, only one set of fixed blocks 405 and impact positioning block 408 are subjected to force, which is less than the wear of parts in a clamping plate. The detachable design of fixed blocks 405 and impact positioning block 408 also makes them easy to replace.

[0075] In addition, during the test, the extrusion outlet 304 continuously pushes the metal pipe forward, and the metal pipe moves in the gap between the fixed block 405, which makes it easy to bend the same metal pipe multiple times and to test the experimental data of the metal pipe under high-frequency impact at multiple angles.

[0076] Then, the metal pipe component 202 is preheated by the heating bracket 203 to soften the metal pipe. The preheating of the metal pipe is to test the fatigue resistance of the metal pipe under large temperature difference, and the preheating can increase the toughness of the metal. In addition, the metal pipe component 202 is further uniformly heated by the induction heating roller 204, and then enters the metal fusion machine 301 for fusion. According to the test standards of different chemical coatings, metal or chemical agents are added from the injection port 302 to obtain metal pipe components with different coatings.

[0077] In addition, the metal fusion device 301 is equipped with an induction heating device, which is convenient for testing whether the metal pipe reaches the maximum temperature for softening when impacted. By adjusting the test to test the impact force on the metal pipe at temperatures close to the critical point and at normal room temperature, the fatigue resistance of the metal pipe can be tested.

[0078] Finally, the pressure motor 609 pushes the bending head 602 towards the metal pipe to facilitate impact bending of the metal pipe. This allows for testing of the metal pipe in more directions. The design of the first buffer roller 603 and the second buffer roller 604 ensures that they roll upon initial contact with the metal pipe, and then the subsequent continuous force output holds them in place. This step helps to dissipate the explosive force generated when the motor starts, making the force exerted by the bending head 602 more stable and uniform. In addition, the push rod motor 605 pushes the cutting head 606 towards the metal pipe to facilitate cutting the tested metal pipe, thus completing a metal pipe. Since the metal content and hardness of the internal metal of the pipe vary, the pressure regulator 607 can be adjusted to adjust the impact speed and force of the push rod motor 605 according to the differences.

[0079] In addition, by activating the lifting motor 502 to push the cutting drill slot 505 towards the metal pipe, the metal pipe can be cut from other directions. The cutting drill slot 505 can be fitted with different cutting drills, which are easy to wear and replace.

[0080] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded 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) cooperate 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). A metal pipe component (202) is installed on the heating bracket (203), and the heating bracket (203) heats the metal pipe component (202). The metal pipe pushing 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). 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 at the top of the inner support plate (404). There are four sets of fixing blocks (405). 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 at the top of the outer connecting ring (407). The outer connecting ring (407) rotates and impacts to bend the metal pipe.

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. Fixed side plates (103) are installed at both ends of the machine tool base plate (101) away from the metal pipe preheating structure (2). A through hole (104) is provided in the machine tool base plate (101) 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). Diversion brackets (205) are installed in four directions on the outer side of the induction heating roller (204). The metal pipe components (202) are set as four sets, and the four sets of metal pipe components (202) are in contact with the diversion brackets (205). The metal pipe components (202) enter the feed end of the metal fusion machine (301) after passing through the diversion brackets (205).

4. The high-frequency impact fatigue testing machine according to claim 1, characterized in that: The metal fusion device (301) is equipped with an extrusion outlet (304) on the side away from the metal pipe preheating structure (2). The extrusion outlet (304) extrudes the raw material of the metal pipe. The top of the metal fusion device (301) is equipped with a feeding port (302), and a chemical metal fusion agent is added to the feeding port (302) to assist the metal pipe in fusion evenly. A waste discharge outlet (303) is installed on one side of the extrusion outlet (304), and the waste discharge outlet (303) discharges the debris and waste generated after the fusion of the metal pipe.

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 there are two sets of telescopic motors (401). 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: A rotary motor (406) passes through the interior of the through hole (104), and an outer connecting ring (407) is connected to the output end of the rotary motor (406). The surface of the outer connecting ring (407) is provided with multiple sets of pre-set holes arranged in annular pattern. 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). A fixing block (408) is installed on the surface of the inner support plate (404). 5), and the fixed block (405) has a triangular prism shape. The sharp part of the fixed block (405) is chamfered. The metal pipe after the metal pipe component (202) is fused passes through the gap between the four fixed blocks (405). The impact positioning block (408) is installed on one side of the tail end of the metal pipe component (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.

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). A telescopic rod (608) is installed at the middle position inside the limiting sleeve (601). 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). 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 one 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) has a push rod motor (605) on one side, and a cutting head (606) is installed on the side of the push rod motor (605) near the metal pipe workpiece. The cutting head (606) has a sharp shape with a raised center.

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). Connecting slide plates (503) are connected to both sides of the cutting drill slot (505). Limiting slide rails (504) are installed on both sides inside the support frame (501), and the limiting slide rails (504) and the connecting slide plates (503) are slidably connected.

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