Creep endurance testing machine and testing method

Abstract

The invention relates to the technical field of material creep tests, and discloses a creep endurance testing machine which comprises an equipment frame and a fixing mechanism slidably connected to the equipment frame, the top of the fixing mechanism is provided with a torsion mechanism, one end of the torsion mechanism is connected with a driving mechanism, and the driving mechanism is connected to the inner top wall of the equipment frame; the fixing mechanism comprises a heating furnace, a base and a protection wall are arranged in the heating furnace, and the protection wall is located in the base. Through stretching out and drawing back of the first telescopic rod and stretching out and drawing back of the extrusion assembly, a creep state test can be conducted on materials in an extrusion state; the creep state test of the material in the torsion state can be carried out by rotating the torsion seat to cooperate with the telescopic adjusting rod, and the test equipment does not need to be replaced, so that the test efficiency is improved; the problems that the test data is single, the test complexity is reduced, and the accuracy of the test data is influenced are solved.

Description

Technical Field

[0001] The invention relates to the technical field of material creep testing, in particular to a creep endurance testing machine and a testing method. Background Art

[0002] Creep refers to the phenomenon that materials slowly undergo plastic deformation under long-term constant temperature and constant load. The stress they are subjected to is much smaller than the yield strength of the material and can be either tensile stress or compressive stress. In aircraft engines, the thermal barrier coating of the test material needs to remain stable for a long time under the erosion of high-temperature combustion gases. Creep endurance tests can evaluate its reliability in such an environment.

[0003] When conducting creep tests on existing test materials, the creep test is performed by extruding and pressurizing the materials. The test data is single and there is no testing equipment for torsion durability. When conducting torsion tests on materials, the heated materials need to be taken out for testing. The process is cumbersome and affects the accuracy of the test data.

[0004] Based on this, the present invention designs a creep endurance testing machine and a testing method to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a creep endurance testing machine and a testing method to solve the above-mentioned problem that the test data is single, the test complexity is reduced and the accuracy of the test data is affected.

[0006] To achieve the above object, the present invention provides the following technical solution: a creep endurance testing machine, comprising an equipment frame, a fixing mechanism slidably connected to the equipment frame, a torsion mechanism being provided on the top of the fixing mechanism, one end of the torsion mechanism being connected to a driving mechanism, and the driving mechanism being connected to the inner top wall of the equipment frame;

[0007] The fixing mechanism comprises a heating furnace, a base and a protective wall are arranged in the heating furnace, the protective wall is located in the base, a plurality of clamping components arranged in a rectangular array are arranged on the protective wall, and a placement platform is arranged at the center of the inner cavity of the protective wall;

[0008] The twisting mechanism comprises a plurality of first telescopic rods and a twisting assembly arranged in a ring shape;

[0009] The twisting assembly comprises a twisting seat, which is connected to one end of a first telescopic rod. A telescopic extrusion assembly is arranged on the twisting seat, and a plurality of extension pieces arranged in a ring are arranged on one side of the twisting seat.

[0010] Preferably, the clamping assembly includes a plurality of first electric push rods arranged in an array, one end of each of the first electric push rods is connected to the side wall of the protective wall, and the other end of the clamping assembly is connected to a positioning plate, and a plurality of anti-slip grooves arranged in an alternating manner are provided on one side of the positioning plate.

[0011] Preferably, the first telescopic rod comprises a plurality of second electric push rods arranged in a circular array, one end of each of the second electric push rods is connected to the torsion seat, and the other ends of each of the second electric push rods are connected to one side of the driving mechanism;

[0012] A strip groove is provided at the bottom of the torsion seat, an extrusion assembly is provided in the strip groove, one end of the extrusion assembly is connected to the center of the torsion seat, and the other end of the extrusion assembly is connected to the output end of the driving mechanism.

[0013] Preferably, the extrusion assembly comprises an extrusion rod, the extrusion rod is located in the strip groove, and the bottom of the extrusion rod is an arc-shaped protrusion;

[0014] Two second telescopic rods are symmetrically arranged on one side of the extrusion rod facing the strip-shaped groove, and one end of the two second telescopic rods is connected to the inner top wall of the strip-shaped groove.

[0015] Preferably, the extension member includes a guide rod and a driving device, the guide rod is connected to the bottom of the torsion seat, a plurality of limit grooves are provided at the bottom of the guide rod, two limit rods and a threaded rod are rotatably connected in the plurality of limit grooves, an extrusion member is threadedly connected to the threaded rod, and the extrusion member is slidably connected to the two limit rods;

[0016] The driving device is connected to one end of the guide rod, and the power output end of the driving device is connected to one end of the threaded rod.

[0017] Preferably, the extrusion member comprises an extrusion block, the bottom of the extrusion block is provided with two grooves, and telescopic adjustment rods are provided in the two grooves.

[0018] Preferably, a controller is provided on one side of the equipment frame, and the telescopic adjustment rod, the clamping assembly and the driving device are all electrically connected to the controller.

[0019] Preferably, a driving motor is provided in the driving mechanism, and the driving motor is electrically connected to the controller.

[0020] A creep endurance test method comprises the following steps:

[0021] S1. First, place the material on the placement platform in the heating furnace, start the clamping assembly, and clamp and position the material through the clamping assembly;

[0022] S2, the heating furnace is powered on to heat the material, and after the heating is completed, the twisting mechanism is started to push the twisting seat to move toward the bottom so that the extruded part contacts the material;

[0023] S3, at this time, the driving mechanism is started, and the torsion mechanism is driven by the driving mechanism to rotate slowly, and the extrusion piece is adjusted so that one of the telescopic adjustment rods is extended to fit with the side wall of the material, and a torsion force is applied to the material;

[0024] S4. Continue to increase the temperature in the heating furnace, and observe and collect data on the creep state of the material in real time through the detection equipment connected to the controller;

[0025] S5. In addition, by starting the driving device at the corresponding position, the driving device drives the threaded rod to rotate, and drives the extrusion block to move, and the two extrusion blocks approach each other to extrude the material;

[0026] S6. Observe and record the creep of the clamped and extruded material.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. Through the extension and retraction of the first telescopic rod and the extrusion assembly, in addition to being able to carry out a creep state test on the material under an extrusion state, the creep state test on the material under a torsion state can also be carried out by rotating the torsion seat in conjunction with the telescopic adjustment rod, and there is no need to replace the test equipment, thereby improving the test efficiency;

[0029] 2. In the present invention, the clamping assembly can be used to clamp and fix materials of different sizes, so that when the device is performing torsion creep, the device will not be displaced, thereby ensuring the stability of the test;

[0030] 3. In the present invention, the positions of multiple extrusion parts can be adjusted by a driving device, so that the equipment can be adjusted according to materials of different sizes, thereby improving the adaptability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the appearance of the present invention;

[0032] Figure 2 The torsion mechanism structure of the present invention is shown in FIG. Figure 1 ;

[0033] Figure 3 The torsion mechanism structure of the present invention is shown in FIG. Figure 2 ;

[0034] Figure 4 Schematic diagram of the extrusion assembly structure of the present invention Figure 1 ;

[0035] Figure 5 It is a schematic diagram of the structure of the extrusion part of the present invention;

[0036] Figure 6 It is a schematic diagram of the structure of the torsion seat of the present invention;

[0037] Figure 7 Schematic diagram of the extrusion assembly structure of the present invention Figure 2 ;

[0038] Figure 8 It is a schematic diagram of the structure of the clamping assembly of the present invention.

[0039] In the figure: 1. equipment frame; 2. fixing mechanism; 21. heating furnace; 22. base; 23. protective wall; 24. clamping assembly; 241. first electric push rod; 242. positioning plate; 25. placement platform; 3. torsion mechanism; 31. first telescopic rod; 311. second electric push rod; 32. torsion assembly; 321. torsion seat; 322. extrusion assembly; 3221. extrusion rod; 3222. second telescopic rod; 323. extension piece; 3231. guide rod; 3232. driving device; 33. extrusion piece; 331. extrusion block; 332. telescopic adjustment rod; 4. driving mechanism. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figure 1-Figure 8 In an embodiment of the present invention, a creep endurance testing machine includes an equipment frame 1, a fixing mechanism 2 slidably connected to the equipment frame 1, a torsion mechanism 3 is provided on the top of the fixing mechanism 2, one end of the torsion mechanism 3 is connected to a driving mechanism 4, and the driving mechanism 4 is connected to the inner top wall of the equipment frame 1;

[0042] The fixing mechanism 2 includes a heating furnace 21, a base 22 and a protective wall 23 are provided in the heating furnace 21, the protective wall 23 is located in the base 22, a plurality of clamping components 24 arranged in a rectangular array are provided on the protective wall 23, and a placement platform 25 is provided in the center of the inner cavity of the protective wall 23;

[0043] The twisting mechanism 3 includes a plurality of first telescopic rods 31 and a twisting assembly 32 arranged in a ring shape;

[0044] The twisting assembly 32 includes a twisting seat 321 connected to one end of the first telescopic rod 31 , a telescopic pressing assembly 322 is provided on the twisting seat 321 , and a plurality of extension pieces 323 arranged in a ring shape are provided on one side of the twisting seat 321 .

[0045] Specifically, the heating furnace 21 is started, the torsion assembly 32 is pushed to move up and down by the extension and retraction of the first telescopic rod 31, and the extrusion assembly 322 on the torsion assembly 32 is extended and retracted to achieve extrusion of the material surface, and an extrusion creep test is performed;

[0046] Secondly, by starting the driving mechanism 4 to drive the torsion assembly 32 to rotate, the clamping assembly 24 is used to clamp and position the material, so that the equipment can perform a torsion creep test on the material and detect the creep state of the material during the torsion process;

[0047] Furthermore, the clamping assembly 24 includes a plurality of first electric push rods 241 arranged in an array, one end of each of the plurality of first electric push rods 241 is connected to the side wall of the protective wall 23, and the other end of the clamping assembly 24 is connected to a positioning plate 242, and a plurality of staggered anti-slip grooves are provided on one side of the positioning plate 242.

[0048] In the above, the first electric push rod 241 can be extended and retracted to push the positioning plate 242, and the material is fixed and clamped by the positioning plate 242. Multiple positioning plates 242 can clamp and fix materials of different sizes, and the anti-slip groove can effectively reduce the sliding problem that occurs during the clamping process and improve the clamping stability.

[0049] Furthermore, the first telescopic rod 31 includes a plurality of second electric push rods 311 arranged in a circular array, one end of each of the second electric push rods 311 is connected to the torsion seat 321, and the other end of each of the second electric push rods 311 is connected to one side of the driving mechanism 4;

[0050] A strip groove is provided at the bottom of the torsion seat 321, and an extrusion assembly 322 is provided in the strip groove. One end of the extrusion assembly 322 is connected to the center of the torsion seat 321, and the other end of the extrusion assembly 322 is connected to the output end of the driving mechanism 4;

[0051] The extrusion assembly 322 includes an extrusion rod 3221, the extrusion rod 3221 is located in the strip groove, and the bottom of the extrusion rod 3221 is an arc-shaped protrusion;

[0052] Two second telescopic rods 3222 are symmetrically provided on one side of the squeezing rod 3221 facing the strip groove, and one end of the two second telescopic rods 3222 is connected to the inner top wall of the strip groove.

[0053] In the above, the rotation of the torsion seat 321 drives the multiple extrusion members 33 to rotate, and the surface of the material is twisted when the multiple extrusion members 33 rotate. Prior to this, by starting the driving device 3232, the power output of the driving device 3232 drives the threaded rod to rotate, so that the extrusion block 331 moves horizontally in the strip groove, so that the adjusted extrusion block 331 can adapt to the corresponding material size, fit with the material surface, and cooperate with the rotation to perform a torsional creep test on the material.

[0054] Further, the extension member 323 includes a guide rod 3231 and a driving device 3232. The guide rod 3231 is connected to the bottom of the torsion seat 321. The bottom of the guide rod 3231 is provided with a plurality of limit grooves. Two limit rods and a threaded rod are rotatably connected in the plurality of limit grooves. The threaded rod is threadedly connected with an extrusion member 33. The extrusion member 33 is slidably connected to the two limit rods.

[0055] The driving device 3232 is connected to one end of the guide rod 3231, and the power output end of the driving device 3232 is connected to one end of the threaded rod;

[0056] The extrusion member 33 includes an extrusion block 331 . Two grooves are formed at the bottom of the extrusion block 331 . Telescopic adjustment rods 332 are disposed in the two grooves.

[0057] In the above, the two telescopic adjustment rods 332 located at the bottom of the extrusion block 331 are extended when torsion creep is performed, and the material can be twisted through the cooperation between the multiple telescopic adjustment rods 332 during rotation;

[0058] When the rotation direction changes, the other side of the material can be clamped and twisted by extending the other telescopic adjustment rod 332 and contracting the other telescopic adjustment rod 332.

[0059] Furthermore, a controller is provided on one side of the equipment frame 1, and the telescopic adjustment rod 332, the clamping assembly 24 and the driving device 3232 are all electrically connected to the controller;

[0060] A driving motor is provided in the driving mechanism 4 , and the driving motor is electrically connected to the controller.

[0061] In the above, by being electrically connected with the controller, personnel can drive multiple components through the controller for easy adjustment.

[0062] A creep endurance test method comprises the following steps:

[0063] S1, firstly, placing the material on the placing platform 25 in the heating furnace 21, starting the clamping assembly 24, and clamping and positioning the material through the clamping assembly 24;

[0064] S2, the heating furnace 21 is powered on to heat the material, and after the heating is completed, the twisting mechanism 3 is started to push the twisting seat 321 to move toward the bottom, so that the extrusion piece 33 contacts the material;

[0065] S3, at this time, the driving mechanism 4 is started, and the torsion mechanism 3 is driven by the driving mechanism 4 to rotate slowly, and the extrusion member 33 is adjusted so that one of the telescopic adjustment rods 332 is extended to fit with the side wall of the material, and a torsion force is applied to the material;

[0066] S4, continue to increase the temperature in the heating furnace 21, and observe and collect data on the creep state of the material in real time through the detection equipment connected to the controller;

[0067] S5. In addition, by starting the driving device 3232 at the corresponding position, the driving device 3232 drives the threaded rod to rotate, and drives the extrusion block 331 to move, and the two extrusion blocks 331 approach each other to extrude the material;

[0068] S6. Observe and record the creep of the clamped and extruded material.

[0069] The working principle of the present invention is: placing the material on the placing platform 25, starting the clamping assembly 24 to clamp and position the material, and closing the heating furnace 21 after completion;

[0070] After the material is heated, the creep effect of the temperature change on the material can be observed. During the process, the first telescopic rod 31 is started to push the torsion seat 321 to adjust the height so as to contact the top of the material, and then the extrusion assembly 322 is started to extrude the top of the material to observe the creep condition of the material in the extruded state.

[0071] Secondly, by starting the driving mechanism 4, the power output shaft of the driving mechanism 4 drives the torsion seat 321 to continuously adjust the rotation direction, so as to adjust the torsion state and degree of the material.

[0072] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A creep endurance testing machine, characterized in that: It comprises an equipment frame (1), a fixing mechanism (2) slidably connected to the equipment frame (1), a torsion mechanism (3) being provided on the top of the fixing mechanism (2), one end of the torsion mechanism (3) being connected to a driving mechanism (4), and the driving mechanism (4) being connected to the inner top wall of the equipment frame (1); The fixing mechanism (2) comprises a heating furnace (21), wherein a base (22) and a protective wall (23) are provided in the heating furnace (21), wherein the protective wall (23) is located in the base (22), wherein a plurality of clamping assemblies (24) arranged in a rectangular array are provided on the protective wall (23), and a placement platform (25) is provided at the center of the inner cavity of the protective wall (23); The twisting mechanism (3) comprises a plurality of first telescopic rods (31) arranged in a ring shape and a twisting assembly (32); The twisting assembly (32) comprises a twisting seat (321), the twisting seat (321) being connected to one end of the first telescopic rod (31), a telescopic extrusion assembly (322) being provided on the twisting seat (321), and a plurality of extension pieces (323) arranged in a ring shape being provided on one side of the twisting seat (321).

2. A creep endurance testing machine according to claim 1, characterized in that: The clamping assembly (24) comprises a plurality of first electric push rods (241) arranged in an array, one end of each of the first electric push rods (241) is connected to the side wall of the protective wall (23), and the other end of the clamping assembly (24) is connected to a positioning plate (242), and one side of the positioning plate (242) is provided with a plurality of anti-slip grooves arranged in a staggered manner.

3. A creep endurance testing machine according to claim 1, characterized in that: The first telescopic rod (31) comprises a plurality of second electric push rods (311) arranged in a ring array, one end of each of the plurality of second electric push rods (311) is connected to a twisting seat (321), and the other end of each of the second electric push rods (311) is connected to one side of a driving mechanism (4); A strip groove is provided at the bottom of the torsion seat (321), and an extrusion assembly (322) is provided in the strip groove. One end of the extrusion assembly (322) is connected to the center of the torsion seat (321), and the other end of the extrusion assembly (322) is connected to the output end of the driving mechanism (4).

4. A creep endurance testing machine according to claim 3, characterized in that: The extrusion assembly (322) comprises an extrusion rod (3221), the extrusion rod (3221) is located in the strip groove, and the bottom of the extrusion rod (3221) is an arc-shaped protrusion; Two second telescopic rods (3222) are symmetrically arranged on one side of the squeezing rod (3221) facing the strip-shaped groove, and one end of the two second telescopic rods (3222) is connected to the inner top wall of the strip-shaped groove.

5. A creep endurance testing machine according to claim 1, characterized in that: The extension member (323) comprises a guide rod (3231) and a driving device (3232); the guide rod (3231) is connected to the bottom of the torsion seat (321); a plurality of limit grooves are provided at the bottom of the guide rod (3231); two limit rods and a threaded rod are rotatably connected in the plurality of limit grooves; an extrusion member (33) is threadedly connected to the threaded rod; and the extrusion member (33) is slidably connected to the two limit rods; The driving device (3232) is connected to one end of the guide rod (3231), and the power output end of the driving device (3232) is connected to one end of the threaded rod.

6. A creep endurance testing machine according to claim 5, characterized in that: The extrusion piece (33) comprises an extrusion block (331), the bottom of the extrusion block (331) is provided with two grooves, and telescopic adjustment rods (332) are arranged in the two grooves.

7. A creep endurance testing machine according to claim 6, characterized in that: A controller is provided on one side of the equipment frame (1), and the telescopic adjustment rod (332), the clamping assembly (24) and the driving device (3232) are all electrically connected to the controller.

8. A creep endurance testing machine according to claim 3, characterized in that: The driving mechanism (4) is provided with a driving motor, and the driving motor is electrically connected to the controller.

9. A creep endurance test method, characterized in that: The following steps are involved: S1, firstly placing the material on the placing platform (25) in the heating furnace (21), starting the clamping assembly (24), and clamping and positioning the material by the clamping assembly (24); S2, the heating furnace (21) is powered on to heat the material, and after the heating is completed, the twisting mechanism (3) is started to push the twisting seat (321) to move toward the bottom, so that the extrusion piece (33) contacts the material; S3, at this time, the driving mechanism (4) is started, and the torsion mechanism (3) is driven by the driving mechanism (4) to rotate slowly, and the extrusion member (33) is adjusted so that one of the telescopic adjustment rods (332) is extended to fit with the side wall of the material, thereby applying a torsion force to the material; S4, continuing to increase the temperature in the heating furnace (21), and observing and collecting data on the creep state of the material in real time through the detection equipment connected to the controller; S5. In addition, by starting the driving device (3232) at the corresponding position, the driving device (3232) drives the threaded rod to rotate, and drives the extrusion block (331) to move, and the two extrusion blocks (331) approach each other to extrude the material; S6. Observe and record the creep of the clamped and extruded material.

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