Creep testing machine

Abstract

The invention discloses a creep testing machine, and relates to the technical field of environment simulation creep testing devices. The creep testing machine comprises an environment box main body, a bottom cross arm group, a plurality of groups of ball screws, a plurality of groups of fixed upright posts, a measuring mechanism, a lower joint rod and a clamp unit. According to the creep testing machine, the structure that the clamp unit is arranged between the lower joint rod and the upper joint rod is adopted, the clamp A, the clamp B and the clamp C in the clamp unit can limit and extrude the two ends and the middle part of a test piece respectively, it is guaranteed that the test piece with the inclined surface does not displace in the testing process, and the testing precision and reliability are improved; meanwhile, the measuring mechanism arranged on the fixed stand column facilitates non-contact measurement of the creep displacement of the tested piece, the magnetic grid reading head and the magnetic grid ruler are matched for measurement, extra interference cannot be generated in the testing process of the tested piece, and the accuracy of a testing result is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of environmental simulation creep testing devices, in particular to a creep testing machine. Background Art

[0002] In modern industry and scientific research, the reliability of material performance is of vital importance. Environmental simulation creep testing devices have emerged as the times require. They can simulate complex environments such as high temperature, high pressure, and high airflow, and accurately monitor the deformation and performance changes of materials under long-term stress conditions. This provides key data support for material research and development and quality control in industries such as aerospace, energy, and electricity.

[0003] Existing environmental simulation creep testing devices simulate the temperature, atmosphere, humidity and other conditions of the material in the actual working environment to study the long-term deformation behavior of the material under constant load. They accurately monitor the deformation and performance changes of the material under long-term stress, facilitate the evaluation of the material's creep resistance, establish creep life models, optimize material design, and ensure engineering safety. However, the creep displacement of the test piece is mostly measured using contact measurement methods, which interferes with the testing process and affects the accuracy of the test results. At the same time, the existing limited extrusion structure is prone to small displacement changes when extruding the test piece with an inclined surface, which is not convenient for achieving accurate measurement and control requirements. In response to the shortcomings of the existing technology, the present invention provides a creep testing machine to solve the above problems. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a creep testing machine that solves the problem that the creep displacement of the test piece is mostly measured by contact measurement, which interferes with the testing process and affects the accuracy of the test results. At the same time, the existing limiting extrusion structure is prone to slight displacement changes when extruding the test piece with an inclined surface, making it difficult to achieve precise measurement and control requirements.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A creep testing machine, comprising:

[0006] The main body of the environmental chamber has a control box on one side;

[0007] The bottom cross arm assembly is fixedly connected to the inner wall of the environmental chamber body;

[0008] Multiple sets of ball screws are slidably connected to the bottom cross arm set;

[0009] Multiple groups of fixed columns, each of which is fixedly connected to the upper end of the ball screw;

[0010] A measuring mechanism comprising a magnetic grating reader mounted on a side of a fixed column, a magnetic scale fixedly connected to the side wall of the fixed column, and the measuring mechanism is used for non-contact measurement of creep displacement of the test piece;

[0011] A lower joint rod is fixedly connected to a fixed column, an upper joint rod is provided above the lower joint rod, a clamp unit is provided between the lower joint rod and the upper joint rod, the clamp unit includes clamp A, clamp B and clamp C, which are respectively fixedly connected to the lower joint rod and the upper joint rod, and the clamp unit is used to limit and squeeze the test piece.

[0012] Preferably, a top cross arm is provided at the upper end of the upper joint rod, and a force sensor is provided between the upper joint rod and the top cross arm.

[0013] Preferably, a plurality of servo motors are provided at the bottom of the bottom cross arm group, and a plurality of transmission mechanisms are provided between the plurality of servo motors and the plurality of ball screws. The transmission mechanisms are used to drive the ball screws to move, and the transmission mechanisms include:

[0014] A first motor frame, which is fixedly connected to the output end of the servo motor;

[0015] a second motor frame threadedly connected to the ball screw;

[0016] The transmission pulley is transmission-connected between the first motor frame and the second motor frame.

[0017] Preferably, a guide rod is fixedly connected between the bottom cross arm group and the top cross arm, a bearing seat is fixedly connected to the bottom cross arm group, and the first motor frame and the second motor frame are fixedly connected to the bearing seat.

[0018] Preferably, a slide rail is fixedly connected to the bottom cross arm group, a slider is slidably connected in the slide rail, one end of the slider is fixedly connected to a connecting seat, and the connecting seat is fixedly connected to a fixed column.

[0019] Preferably, an environmental box air circulation unit is provided in the environmental box body, and the environmental box air circulation unit is used to simulate real environmental airflow in the environmental box body.

[0020] Preferably, a revolving door is hinged on the upper part of the environmental chamber body, a transparent observation window is provided on the revolving door, and a limiting mechanism is provided on the revolving door for limiting the position of the revolving door.

[0021] Preferably, a control panel is provided on the control box.

[0022] Preferably, heat dissipation holes are provided on the outer peripheral wall of the environmental box body and the control box.

[0023] Preferably, the environmental chamber body and the bottom of the control box are fixedly connected with universal wheels.

[0024] The present invention discloses a creep testing machine, which has the following beneficial effects:

[0025] This creep testing machine adopts a structure in which a fixture unit is set between the lower joint rod and the upper joint rod. Clamps A, B and C in the fixture unit can respectively limit and squeeze the two ends and the middle part of the test piece, ensuring that the test piece with an inclined surface does not move during the test process, thereby improving the accuracy and reliability of the test. At the same time, the measuring mechanism set on the fixed column facilitates the non-contact measurement of the creep displacement of the test piece. The magnetic grating reader and the magnetic scale cooperate in measurement without causing additional interference to the test process of the test piece, thereby ensuring the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

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

[0028] Figure 2 This is a schematic structural diagram of the transparent observation window of the present invention;

[0029] Figure 3 This is a schematic diagram of the revolving door structure of the present invention;

[0030] Figure 4 Schematic diagram of the transmission mechanism structure of the present invention;

[0031] Figure 5 Schematic diagram of the fixture unit structure of the present invention;

[0032] Figure 6 It is a schematic diagram of the ball screw structure of the present invention.

[0033] In the figure: 1. Environmental chamber body; 101. Bottom cross arm group; 102. Environmental chamber air circulation unit; 103. Revolving door; 1031. Transparent observation window; 1032. Limiting mechanism; 104. Heat dissipation hole; 105. Universal wheel; 107. Control box; 1071. Control panel; 2. Top cross arm; 3. Guide rod; 4. Bearing seat; 5. Transmission mechanism; 501. First motor frame; 502. Drive pulley; 503. Second motor frame; 6. Clamp unit; 601. Clamp A; 602. Clamp B; 603. Clamp C; 7. Ball screw; 8. Fixed column; 9. Slide rail; 10. Slider; 11. Connecting seat; 12. Lower joint rod; 13. Upper joint rod; 14. Force sensor; 15. Measuring mechanism; 1501. Magnetic grating reader; 1502. Magnetic scale; 16. Servo motor. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] The embodiment of the present application provides a creep testing machine, which solves the problem that the creep displacement of the test piece is mostly measured by contact measurement. The contact measurement method will interfere with the testing process and affect the accuracy of the test results. At the same time, the existing limiting and extrusion structure is prone to slight displacement changes when extruding the test piece with an inclined surface, which is not convenient for achieving accurate measurement and control requirements. The invention realizes a structure in which a clamp unit 6 is set between the lower joint rod 12 and the upper joint rod 13. The clamps A601, B602 and C603 in the clamp unit 6 can respectively limit and squeeze the two ends and the middle part of the test piece, ensuring that the test piece with an inclined surface does not move during the test process, thereby improving the accuracy and reliability of the test. At the same time, the measuring mechanism 15 set on the fixed column 8 facilitates the non-contact measurement of the creep displacement of the test piece. The magnetic grating reader 1501 and the magnetic scale 1502 cooperate in measurement without causing additional interference to the test process of the test piece, thereby ensuring the accuracy of the test results.

[0036] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0037] The embodiment of the present invention discloses the creep testing machine.

[0038] Embodiment 1: According to the attached Figure 1-6 Shown, including:

[0039] The environmental chamber body 1 has a control box 107 installed on one side. The creep test device is fixed in the environmental chamber body 1, ensuring that each joint rod passes through the insulation layer of the environmental chamber body 1. The environmental chamber body 1 serves as the main structure of the entire test device, providing a closed test environment for accommodating the test piece and the test mechanism, and simulating real environmental conditions. The user can easily perform various operations through the control panel 1071 on the control box 107;

[0040] The bottom cross arm assembly 101 is fixedly connected to the inner wall of the environmental chamber body 1. The bottom cross arm assembly 101 serves as the basic support component of the entire gantry frame and is fixed to the bottom of the environmental chamber body 1 to provide a stable installation foundation for the guide rod 3 and other components.

[0041] Multiple sets of ball screws 7 are slidably connected to the bottom cross arm set 101. The upper ends of the ball screws 7 are fixedly connected to the fixed columns 8. Driven by the servo motor 16 and the transmission mechanism 5, the ball screws 7 can drive the fixed columns 8 to move up and down, thereby achieving the purpose of adjusting the position of the lower joint rod 12;

[0042] Multiple groups of fixed columns 8 are fixedly connected to the upper ends of the ball screws 7. The fixed columns 8 are equipped with magnetic grating readers 1501 on the side and magnetic scales 1502 on the side walls for non-contact measurement of creep displacement of the test piece.

[0043] The measuring mechanism 15 includes a magnetic grating reader 1501 mounted on the side of the fixed column 8, and a magnetic scale 1502 is fixedly connected to the side wall of the fixed column 8. The measuring mechanism 15 is used for non-contact measurement of creep displacement of the test piece;

[0044] The lower joint rod 12 is fixedly connected to the fixed column 8. An upper joint rod 13 is arranged above the lower joint rod 12. A clamp unit 6 is arranged between the lower joint rod 12 and the upper joint rod 13. The clamp unit 6 includes a clamp A601, a clamp B602 and a clamp C603, which are respectively fixedly connected to the lower joint rod 12 and the upper joint rod 13. The clamp unit 6 is used to limit and squeeze the test piece.

[0045] The control box 107 is provided with a control panel 1071 , through which the user can perform various operations.

[0046] Heat dissipation holes 104 are provided on the outer peripheral walls of the environmental chamber body 1 and the control box 107 . Heat dissipation holes 104 are provided on the outer peripheral walls of the control box 107 for heat dissipation to prevent internal components from overheating.

[0047] Universal wheels 105 are fixedly connected to the bottom of the environmental chamber body 1 and the control box 107. The universal wheels 105 at the bottom of the environmental chamber body 1 and the control box 107 facilitate their movement and positioning.

[0048] The fixture unit 6 structure arranged between the lower joint rod 12 and the upper joint rod 13 ensures that the test piece with an inclined surface does not move during the test, thereby improving the accuracy and reliability of the test. The fixtures A601, B602 and C603 in the fixture unit 6 have different limiting structures. The fixtures A601 and C603 are convenient for limiting the two ends of the test piece to ensure that it does not move toward the two ends during the test. The function of the fixture B602 is mainly to apply a constant load to the middle part of the inclined test piece and perform the test in the environmental chamber body 1 at the same time. The environmental chamber body 1 serves as the main structure of the entire test device, providing a closed test environment for accommodating the test piece and the test mechanism, and simulating real environmental conditions. The fixture unit 6 can limit and squeeze the two ends and the middle part of the test piece respectively, thereby ensuring that the test piece with an inclined surface does not move during the test, thereby improving the accuracy and reliability of the test.

[0049] Example 2: According to the attached Figure 1-6 Shown, including:

[0050] The environmental chamber body 1 has a control box 107 installed on one side. The creep test device is fixed in the environmental chamber body 1, ensuring that each joint rod passes through the insulation layer of the environmental chamber body 1. The environmental chamber body 1 serves as the main structure of the entire test device, providing a closed test environment for accommodating the test piece and the test mechanism, and simulating real environmental conditions. The user can easily perform various operations through the control panel 1071 on the control box 107;

[0051] The bottom cross arm assembly 101 is fixedly connected to the inner wall of the environmental chamber body 1. The bottom cross arm assembly 101 serves as the basic support component of the entire gantry frame and is fixed to the bottom of the environmental chamber body 1 to provide a stable installation foundation for the guide rod 3 and other components.

[0052] Multiple sets of ball screws 7 are slidably connected to the bottom cross arm group 101. The upper end of the ball screw 7 is fixedly connected to the fixed column 8. Driven by the servo motor 16 and the transmission mechanism 5, the ball screw 7 can drive the fixed column 8 to move up and down, thereby achieving the purpose of adjusting the position of the lower joint rod 12;

[0053] Multiple groups of fixed columns 8 are fixedly connected to the upper ends of the ball screws 7. The fixed columns 8 are equipped with magnetic grating readers 1501 on the side and magnetic scales 1502 on the side walls for non-contact measurement of creep displacement of the test piece.

[0054] The measuring mechanism 15 includes a magnetic grating reader 1501 mounted on the side of the fixed column 8, and a magnetic scale 1502 is fixedly connected to the side wall of the fixed column 8. The measuring mechanism 15 is used for non-contact measurement of creep displacement of the test piece;

[0055] The lower joint rod 12 is fixedly connected to the fixed column 8. An upper joint rod 13 is arranged above the lower joint rod 12. A clamp unit 6 is arranged between the lower joint rod 12 and the upper joint rod 13. The clamp unit 6 includes a clamp A601, a clamp B602 and a clamp C603, which are respectively fixedly connected to the lower joint rod 12 and the upper joint rod 13. The clamp unit 6 is used to limit and squeeze the test piece.

[0056] A top cross arm 2 is provided at the upper end of the upper joint rod 13, and a force sensor 14 is provided between the upper joint rod 13 and the top cross arm 2. The force sensor 14 is provided between the top cross arm 2 and the upper joint rod 13, and can monitor and record the force changes during the test in real time.

[0057] A plurality of servo motors 16 are provided at the bottom of the bottom cross arm assembly 101. A plurality of transmission mechanisms 5 are provided between the plurality of servo motors 16 and the plurality of ball screws 7. The transmission mechanisms 5 are used to drive the ball screws 7 to move. The transmission mechanisms 5 include:

[0058] A first motor frame 501 is fixedly connected to the output end of the servo motor 16;

[0059] The second motor frame 503 is threadedly connected to the ball screw 7;

[0060] The drive pulley 502 is connected between the first motor frame 501 and the second motor frame 503. The servo motor 16 is fixedly connected to the bottom of the bottom crossarm assembly 101. The output end of the servo motor 16 is fixedly connected to the first motor frame 501. The second motor frame 503 is threadedly connected to the ball screw 7. The drive pulley 502 is connected between the first motor frame 501 and the second motor frame 503. Driven by the servo motor 16, the transmission mechanism 5 can drive the ball screw 7 to move.

[0061] A guide rod 3 is fixedly connected between the bottom cross arm assembly 101 and the top cross arm 2 . A bearing seat 4 is fixedly connected to the bottom cross arm assembly 101 . The first motor frame 501 and the second motor frame 503 are fixedly connected to the bearing seat 4 .

[0062] A slide rail 9 is fixedly connected to the bottom cross arm assembly 101 , a slider 10 is slidably connected inside the slide rail 9 , one end of the slider 10 is fixedly connected to a connecting seat 11 , and the connecting seat 11 is fixedly connected to the fixed column 8 .

[0063] An environmental chamber air circulation unit 102 is provided in the environmental chamber main body 1 , and the environmental chamber air circulation unit 102 is used to simulate real environmental airflow in the environmental chamber main body 1 .

[0064] A revolving door 103 is hinged on the upper part of the environmental chamber body 1 . A transparent observation window 1031 is provided on the revolving door 103 . A limiting mechanism 1032 is provided on the revolving door 103 . The limiting mechanism 1032 is used to limit the revolving door 103 .

[0065] After the test piece with an inclined surface is installed on the fixture unit 6, the servo motor 16 fixedly connected to the bottom of the bottom cross arm group 101 is started. The first motor frame 501 fixedly connected to the output end of the servo motor 16 drives the transmission pulley 502 to rotate, and the transmission pulley 502 drives the second motor frame 503 threadedly connected to the ball screw 7 to rotate. Driven by the servo motor 16, the transmission mechanism 5 can drive the ball screw 7 to move upward. When the fixture unit 6 and the test piece are completely against each other and the reading of the force sensor 14 is zero, the first step of the installation is completed.

[0066] The second step is to start the heating function in the environmental chamber body 1 to simulate the test piece working under actual working conditions. At the same time, the user can easily perform various operations through the control panel 1071 on the control box 107. Then, under the drive of the servo motor 16, the transmission mechanism 5 can drive the ball screw 7 to move upward and apply a constant pressure to the test piece. This can be done by observing the reading on the force sensor 14. The magnetic grating reader 1501 and the magnetic scale 1502 in the measuring mechanism 15 can realize non-contact measurement of the creep displacement of the test piece. The magnetic grating reader 1501 and the magnetic scale 1502 cooperate in measurement without causing additional interference to the test process of the test piece, thereby ensuring the accuracy of the test results.

[0067] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0068] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A creep testing machine, characterized in that: include: An environmental chamber body (1), with a control box (107) provided on one side; A bottom cross arm assembly (101) fixedly connected to the inner wall of the environmental chamber body (1); A plurality of ball screws (7) are slidably connected to the bottom cross arm assembly (101); Multiple groups of fixed columns (8), which are respectively fixedly connected to the upper ends of the ball screws (7); A measuring mechanism (15) comprising a magnetic grating reader (1501) mounted on a side of a fixed column (8), a magnetic grating scale (1502) being fixedly connected to a side wall of the fixed column (8), the measuring mechanism (15) being used for non-contact measurement of creep displacement of a test piece; A lower joint rod (12) is fixedly connected to a fixed column (8); an upper joint rod (13) is provided above the lower joint rod (12); a clamp unit (6) is provided between the lower joint rod (12) and the upper joint rod (13); the clamp unit (6) comprises a clamp A (601), a clamp B (602) and a clamp C (603), which are fixedly connected to the lower joint rod (12) and the upper joint rod (13), respectively; the clamp unit (6) is used to limit and squeeze the test piece.

2. A creep testing machine according to claim 1, characterized in that: A top cross arm (2) is provided at the upper end of the upper joint rod (13), and a force sensor (14) is provided between the upper joint rod (13) and the top cross arm (2).

3. A creep testing machine according to claim 2, characterized in that: A plurality of servo motors (16) are provided at the bottom of the bottom cross arm group (101), and a plurality of transmission mechanisms (5) are provided between the plurality of servo motors (16) and the plurality of ball screws (7). The transmission mechanisms (5) are used to drive the ball screws (7) to move, and the transmission mechanisms (5) include: A first motor frame (501) is fixedly connected to the output end of the servo motor (16); A second motor frame (503) is threadedly connected to the ball screw (7); The transmission pulley (502) is transmission-connected between the first motor frame (501) and the second motor frame (503).

4. A creep testing machine according to claim 3, characterized in that: A guide rod (3) is fixedly connected between the bottom cross arm group (101) and the top cross arm (2), a bearing seat (4) is fixedly connected to the bottom cross arm group (101), and the first motor frame (501) and the second motor frame (503) are fixedly connected to the bearing seat (4).

5. A creep testing machine according to claim 1, characterized in that: A slide rail (9) is fixedly connected to the bottom cross arm group (101), a slider (10) is slidably connected inside the slide rail (9), one end of the slider (10) is fixedly connected to a connecting seat (11), and the connecting seat (11) is fixedly connected to the fixed column (8).

6. A creep testing machine according to claim 1, characterized in that: An environmental box air circulation unit (102) is provided in the environmental box body (1), and the environmental box air circulation unit (102) is used to simulate real environmental airflow in the environmental box body (1).

7. A creep testing machine according to claim 1, characterized in that: A revolving door (103) is hinged above the environmental chamber body (1), a transparent observation window (1031) is provided on the revolving door (103), and a limiting mechanism (1032) is provided on the revolving door (103), and the limiting mechanism (1032) is used to limit the revolving door (103).

8. The creep testing machine according to claim 1, characterized in that: The control box (107) is provided with a control panel (1071).

9. The creep testing machine according to claim 1, characterized in that: Heat dissipation holes (104) are provided on the outer peripheral walls of the environmental chamber body (1) and the control box (107).

10. The creep testing machine according to claim 1, characterized in that: The environmental chamber body (1) and the bottom of the control box (107) are fixedly connected with universal wheels (105).

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