Fatigue test fixture capable of performing multi-sample test

Abstract

The utility model discloses a fatigue test fixture capable of performing a multi-sample test, which belongs to the technical field of test fixtures and comprises two sample supports arranged on a working table of a fatigue testing machine at a certain interval and detachably connected with the working table of the fatigue testing machine; a plurality of samples are transversely arranged at the tops of the two sample supports in parallel; the pressure head mounting seat is arranged above the sample support and is detachably connected with the fatigue testing machine; the pressing rod assemblies are inserted into the pressing head mounting seat; the multiple pressing rod assemblies are arranged in one-to-one correspondence with the multiple samples and abut against the samples so as to apply downward force to the samples. According to the fatigue test fixture capable of testing the multiple samples, the multiple samples can be tested at the same time, the operation is convenient, and the test efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to test fixture technical field, concretely relates to a fatigue test fixture that can carry out multiple sample test. BACKGROUND

[0002] Fatigue test technology is applied in many fields such as aerospace, automobile, electronics, and electric porcelain. For example, in the field of aerospace, the technology is used to evaluate the fatigue performance of aircraft structure during flight; in the automobile industry, it is used to test the durability of automobile parts; in the electric porcelain industry, it is used to study the fatigue life of electric porcelain products; in the electric porcelain industry, it currently mainly includes electronic universal testing machine, high-frequency vibration fatigue testing machine and other methods. The three-point bending test method is widely used to evaluate the fatigue test of materials.

[0003] Traditional three-point bending fixture can only hold one sample per test, and due to the processing of various material test samples cannot be completely consistent, there are differences in the size of each sample, each sample cannot be tested at the same time, and needs to be tested separately. For the bending fatigue test of materials, a large number of different cycle tests are required, each cycle test takes a long time, and multiple parallel tests are required for the same cycle test, which takes a long time. UTILITY MODEL CONTENT

[0004] In order to solve the above problems, the utility model adopts the following technical scheme:

[0005] A fatigue test fixture capable of multiple sample tests, comprising:

[0006] Two sample supports, two sample supports are arranged at a certain distance on the workbench of the fatigue testing machine and are detachably connected with the workbench of the fatigue testing machine; multiple sample transverse parallel arrangements are arranged on the top of the two sample supports;

[0007] A pressure head mounting seat is arranged above the sample support and is detachably connected with the fatigue testing machine;

[0008] A plurality of pressure rod assemblies are inserted into the pressure head mounting seat; a plurality of pressure rod assemblies are arranged one-to-one corresponding to a plurality of samples and abut against the samples to exert a downward force on the samples.

[0009] Further, the top of the sample support is provided with a first groove along the length direction; a steel bar is arranged in the first groove; the steel bar is arranged perpendicular to the axis of the sample and abuts against the end of the sample.

[0010] Further, the first groove is a reverse triangular structure.

[0011] Further, the sample support is L-shaped structure; a plurality of stop blocks are arranged on the sample support; the first end of the stop block is detachably connected with the outer wall of the vertical part of the sample support, and the second end of the stop block extends longitudinally to the outside of the sample support; the second end of the stop block is provided with a second groove, and the end of the sample passes through the second groove to fix the sample.

[0012] Further, the second groove is U-shaped structure.

[0013] Further, a first threaded hole is arranged on the horizontal part of the sample support; a plurality of second threaded holes are arranged on the inner wall of the vertical part of the sample support, and the second threaded holes are arranged correspondingly with the stop blocks; the stop blocks are threadedly connected with the sample support through cross slot screws.

[0014] Further, a boss is arranged at the middle position of the top of the pressure head mounting seat, a third threaded hole is longitudinally arranged in the boss and communicates with the pressure head mounting seat; a plurality of insertion holes are arranged at both ends of the top of the pressure head mounting seat, and the insertion holes extend longitudinally in the pressure head mounting seat; the pressure head assembly is longitudinally inserted into the insertion hole and detachably connected with the pressure head mounting seat.

[0015] Further, the pressure head assembly comprises a pressure rod and a pressure head; the first end of the pressure rod is inserted into the insertion hole and detachably connected with the pressure head mounting seat; the second end of the pressure rod extends to the outside of the insertion hole, and the second end of the pressure rod is provided with a third groove in the width direction of the pressure rod, and the third groove is inverted triangular structure; the pressure head is transversely arranged in the third groove and connected with the third groove through a short pin.

[0016] Further, a pressure plate is arranged between the pressure rod and the pressure head mounting seat; a threaded through hole is arranged in the pressure plate; a plurality of fourth threaded holes are longitudinally arranged on the side wall of the pressure head mounting seat, and the fourth threaded holes communicate with the insertion hole; a hexagonal screw is threadedly connected in the threaded through hole and the fourth threaded hole to threadedly connect the pressure head mounting seat with the pressure plate.

[0017] Further, the pressure head is cylindrical structure.

[0018] Beneficial effects:

[0019] (1) In the prior art, only one sample can be clamped for each test when the fatigue performance test is performed, and the test time is long, the fatigue test clamp provided by the present application can simultaneously test a plurality of samples, effectively reducing the test times, greatly improving the test efficiency under the premise of ensuring the normal test of mechanical energy, and saving the test cost.

[0020] (2) In actual testing, the processing of various material test samples cannot be completely consistent, and the size of each sample has more or less differences, and each sample cannot be tested at the same time and needs to be tested separately. The fatigue test fixture capable of multiple sample testing provided by the utility model can test multiple samples at one time, reduces the test times, saves the test time, adjusts the position of the pressing rod in the insertion hole through the pressing plate, so that each pressing head can contact the sample at the same time when facing different samples, and the application range is wider. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is an overall structural schematic view of the fatigue test fixture capable of multiple sample testing of the utility model;

[0022] Figure 2 It is a top view of the pressing head mounting seat of the fatigue test fixture capable of multiple sample testing of the utility model;

[0023] Figure 3 It is a front view of the pressing head mounting seat of the fatigue test fixture capable of multiple sample testing of the utility model;

[0024] Figure 4 It is a front view of the pressing plate of the fatigue test fixture capable of multiple sample testing of the utility model;

[0025] Figure 5 It is a front view of the pressing rod assembly of the fatigue test fixture capable of multiple sample testing of the utility model;

[0026] Figure 6 It is a front view of the short pin of the fatigue test fixture capable of multiple sample testing of the utility model;

[0027] Figure 7 It is a working state schematic view of the fatigue test fixture capable of multiple sample testing of the utility model in use;

[0028] 1, sample support; 2, pressing head mounting seat; 3, pressing rod assembly; 4, first threaded hole; 5, second threaded hole; 6, cross slot screw; 7, stop block; 8, steel bar; 9, third threaded hole; 10, square hole; 11, fourth threaded hole; 12, cylindrical inner hexagonal screw; 13, pressing plate; 14, threaded through hole; 15, pressing rod; 16, pressing head; 17, circular through hole; 18, short pin; 19, fatigue testing machine; 20, sample. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "horizontal," "inner," "outer," and "one side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Example 1

[0032] like Figures 1 to 7 As shown, a fatigue testing fixture capable of performing multi-sample tests includes:

[0033] Two sample supports 1 are set on the worktable of the fatigue testing machine 19 at a certain distance apart and are detachably connected to the worktable of the fatigue testing machine 19; multiple samples 20 are set horizontally and parallel on the top of the two sample supports 1.

[0034] The pressure head 16 mounting base 2 is located above the sample support 1 and is detachably connected to the fatigue testing machine 19.

[0035] Multiple pressure rod assemblies 3 are inserted into the mounting base 2 of the pressure head 16; the multiple pressure rod assemblies 3 are set one-to-one with multiple samples 20 and abut against the samples 20 to apply a downward force to the samples 20.

[0036] With the above technical solution, multiple samples 20 are placed horizontally and parallel on top of two sample supports 1. The samples 20 and the sample supports 1 are set perpendicular to each other. The pressure rod 15 assembly 3 is set above the samples 20 and abuts against the samples 20. Each pressure rod 15 assembly 3 corresponds to one sample 20.

[0037] In this embodiment, a first groove is provided on the top of the sample support along its length; a steel rod is provided in the first groove; the steel rod is perpendicular to the axis of the sample and abuts against the end of the sample.

[0038] Through the technical scheme, the two ends of the sample 20 are respectively arranged on the steel bars 8 on the top of the two sample supports 1, and the steel bars 8 and the sample 20 are arranged perpendicular to each other.

[0039] In the embodiment, the first groove is a reverse triangular structure.

[0040] Through the technical scheme, the top of the sample support 1 is provided with a reverse triangular groove, and the steel bar 8 of a corresponding specification can be clamped into the first groove and clamped tightly.

[0041] In the embodiment, the sample support 1 is an L-shaped structure; a plurality of stop blocks 7 are arranged on the sample support 1; a first end of the stop block 7 is detachably connected with an outer wall of a vertical part of the sample support 1, and a second end of the stop block 7 extends longitudinally to the outside of the sample support 1; a second groove is arranged on the second end of the stop block 7, and an end of the sample 20 passes through the second groove to fix the sample 20.

[0042] The first groove is arranged on the top of the vertical part of the L-shaped sample support 1.

[0043] In the embodiment, the second groove is a U-shaped structure.

[0044] Through the technical scheme, after the end of the sample 20 passes through the second groove, the sample 20 is arranged on the top of the steel bar 8, so that the second groove of the second end of the stop block 7 limits the sample 20, and the sample 20 is prevented from shaking left and right on the top of the steel bar 8 during the test.

[0045] In the embodiment, a first threaded hole 4 is arranged on a horizontal part of the sample support 1; a plurality of second threaded holes 5 are arranged on an inner wall of a vertical part of the sample support 1, and the second threaded holes 5 are arranged correspondingly to the stop blocks 7; the stop blocks 7 are threadedly connected with the sample support 1 through the cross-slot screws 5.

[0046] Through the technical scheme, the bottom center of the horizontal part of the L-shaped sample support 1 is provided with the first threaded hole 4, the horizontal part of the L-shaped sample support 1 can be fixed with the fatigue testing machine 19 through a screw, and the interval between the two bases can be adjusted by loosening the screw and moving the base; the inner wall of the vertical part of the L-shaped sample support 1 is equally provided with four rows of second threaded holes 5, and each row has two second threaded holes 5; the first end of the stop block 7 is connected with the cross-slot screw 5, the first end of the stop block 7 is simultaneously drilled, and the position of the hole is consistent with the second threaded hole 5.

[0047] In the embodiment, a boss is arranged at the middle position of the top of the indenter 16 mounting base 2, a third threaded hole 9 is longitudinally arranged in the boss and communicates with the indenter 16 mounting base 2; a plurality of insertion holes 10 are arranged at both ends of the top of the indenter 16 mounting base 2, and the insertion holes 10 longitudinally extend in the indenter 16 mounting base 2; the indenter 16 assembly is longitudinally inserted into the insertion hole 10 and detachably connected with the indenter 16 mounting base 2.

[0048] The plug hole 10 is a directional hole; preferably, two square holes are arranged at the top of the two ends of the press head 16 mounting seat 2, and the two square holes are arranged side by side along the length direction of the press head 16 mounting seat 2.

[0049] According to the above technical scheme, the third threaded hole 9 is arranged at the center of the press head 16 mounting seat 2, and the third threaded hole 9 is connected and fixed with the fatigue testing machine 19 through the cylindrical internal hexagonal screw; there are two square holes on each side of the press head 16 mounting seat 2, and each square hole is provided with a row of three third threaded holes 9 on the same side, and the screw is connected and fixed with the pressing plate 13; the pressing plate 13 is provided with a threaded hole 14 at the center, and the position is consistent with the center of the threaded hole of the square hole.

[0050] In this embodiment, the press head 16 assembly includes a press rod 15 and a press head 16; the first end of the press rod 15 is inserted into the plug hole 10 and is detachably connected with the press head 16 mounting seat 2; the second end of the press rod 15 extends out of the plug hole 10, and the second end of the press rod 15 is provided with a third groove in the width direction of the press rod, and the third groove is a reverse triangular structure; the press head 16 is transversely arranged in the third groove and is connected with the third groove through a short pin; the press head 16 abuts against the sample 20.

[0051] According to the above technical scheme, the third groove is arranged at the bottom of the press rod 15, and the third groove is a reverse triangular structure, which can clamp the corresponding specification of the press head 16 into the third groove and press it tightly; the circular through hole 17 is arranged at the bottom of the press rod 15, and the short pin 18 is embedded in the circular through hole 17 to fix the press head 16.

[0052] In this embodiment, the press plate 13 is arranged between the press rod 15 and the press head 16 mounting seat 2; the threaded hole 14 is arranged in the press plate 13; the fourth threaded hole 11 is longitudinally arranged on the side wall of the press head 16 mounting seat 2, and the fourth threaded hole 11 is in communication with the plug hole 10; the cylindrical internal hexagonal screw 12 is threadedly connected in the threaded hole 14 and the fourth threaded hole 11, so that the press head 16 mounting seat 2 is threadedly connected with the press plate 13.

[0053] The screw is preferably a cylindrical internal hexagonal screw 12, and the length of the cylindrical internal hexagonal screw 12 is greater than the sum of the length of the threaded hole in the square hole and the length of the threaded hole 14 of the press plate 13.

[0054] Through the technical scheme, the threaded hole 14 is arranged at the center of the pressing plate 13 and is consistent with the center of the threaded hole of the square hole, the pressing plate 13 and the pressing head 16 mounting seat 2 are connected and fixed through the cylindrical internal hexagonal screw 12, the pressing rod 15 assembly 3 is connected and fixed with the pressing plate 13 through the cylindrical internal hexagonal screw 12, so that the pressing plate 13 generates the acting force on the pressing rod 15 in the square hole of the pressing head 16 mounting seat 2, and the position of the pressing rod 15 in the jack 10 is fixed; the position of the pressing rod in the jack is adjusted through the adjusting pressing plate, so that the sample can be contacted by each pressing head at the same time when facing different samples.

[0055] In the embodiment, the pressing head 16 is a cylindrical structure.

[0056] The working process of the fatigue test fixture capable of performing multi-sample tests is as follows:

[0057] The fatigue testing machine 1 is connected and fixed with the pressing head mounting seat 2 through the third threaded hole 9, the pressing head mounting seat 2 is lifted first, the four samples are placed into the corresponding stop blocks 7 of the sample support 1 and are in contact with the steel rods 8, the pressing head mounting seat 2 is lowered to be close to the upper surface of the samples 20 by the fatigue testing machine (that is, the pressing head mounting seat 2 is not in contact with the samples 20) by 2-3 mm, the cylindrical internal hexagonal screw 12 is loosened in sequence to make the pressing rod assembly 3 and the pressing plate 13 loose, the pressing rod assembly 3 performs free fall motion to stop at the upper surface of the samples 20, the cylindrical internal hexagonal screw 12 is tightened at this time, the pressing rod assembly 3 and the pressing plate 13 are connected and fixed, so that the four pressing heads 13 are all in contact with the upper surface of the samples; at this time, the fatigue testing machine can be started to start the test, when the test is finished, the pressing head mounting seat 2 is lifted by the fatigue testing machine, the pressing heads 13 are loose from the samples 20, the samples 20 are taken out, and subsequent tests are performed.

[0058] The above is only a preferred embodiment of the utility model, and does not limit the technical range of the utility model, so any slight modification, equivalent change and modification made according to the technical essence of the utility model to the above embodiment still belongs to the range of the technical scheme of the utility model.

Claims

1. A fatigue testing fixture capable of performing multi-sample tests, characterized in that, The utility model relates to a fatigue test machine, including: Two sample supports, two sample supports are arranged at a distance apart on the workbench of a fatigue testing machine and are detachably connected with the workbench of the fatigue testing machine, and a plurality of samples are arranged horizontally and in parallel on the top of the two sample supports; A pressure head mounting seat is arranged above the sample support and is detachably connected with the fatigue testing machine; A plurality of pressure rod assemblies are inserted into the pressure head mounting seat; a plurality of pressure rod assemblies are arranged one-to-one corresponding to a plurality of samples and abut against the samples to exert a downward force on the samples.

2. The multi-sample fatigue test jig according to claim 1, wherein The top of the sample support is provided with a first groove along the length direction; a steel bar is arranged in the first groove; the steel bar is arranged perpendicularly to the axis of the sample and abuts against the end of the sample.

3. The multi-sample fatigue test fixture of claim 2, wherein, The first groove is a reverse triangular structure.

4. The multi-sample fatigue test fixture of claim 1, wherein, The sample support is an L-shaped structure; a plurality of stop blocks are arranged on the sample support; the first end of the stop block is detachably connected with the outer wall of the vertical part of the sample support, and the second end of the stop block extends longitudinally to the outside of the sample support; the second end of the stop block is provided with a second groove, and the end of the sample passes through the second groove to fix the sample.

5. The multi-sample fatigue test fixture of claim 4, wherein, The second groove is a U-shaped structure.

6. The multi-sample fatigue test fixture of claim 4, wherein, A first threaded hole is arranged on the horizontal part of the sample support in the transverse direction; a plurality of second threaded holes are arranged on the inner wall of the vertical part of the sample support, corresponding to the stop blocks; the stop blocks are screw-connected with the sample support through cross-slot screws.

7. The multi-sample fatigue test fixture of claim 1, wherein, A boss is arranged at the middle position of the top of the pressure head mounting seat; a third threaded hole is longitudinally arranged in the boss and communicates with the pressure head mounting seat; a plurality of insertion holes are arranged at both ends of the top of the pressure head mounting seat, and the insertion holes extend longitudinally in the pressure head mounting seat; the pressure head assembly is longitudinally inserted into the insertion hole and detachably connected with the pressure head mounting seat.

8. The multi-sample fatigue test fixture of claim 7, wherein, The pressure head assembly includes a pressure rod and a pressure head; the first end of the pressure rod is inserted into the insertion hole and detachably connected with the pressure head mounting seat; the second end of the pressure rod extends to the outside of the insertion hole; a third groove is arranged on the second end of the pressure rod along the width direction of the pressure rod; the third groove is a reverse triangular structure; the pressure head is arranged horizontally in the third groove and connected with the third groove through a short pin.

9. The multi-sample fatigue test fixture of claim 8, wherein, A pressure plate is arranged between the pressure rod and the pressure head mounting seat; a threaded through hole is arranged in the pressure plate; a plurality of fourth threaded holes are arranged longitudinally on the side wall of the pressure head mounting seat and communicate with the insertion hole; a hexagonal screw is screw-connected in the threaded through hole and the fourth threaded hole to screw-connect the pressure head mounting seat with the pressure plate.

10. The multi-sample fatigue test fixture of claim 9, wherein, The pressure head is a cylindrical structure.

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