CN114323924A - Sample fatigue tension and compression loading test device and installation method - Google Patents
Sample fatigue tension and compression loading test device and installation method Download PDFInfo
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- 238000009661 fatigue test Methods 0.000 abstract description 15
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Abstract
The invention relates to the technical field of metal material fatigue performance test device structures, in particular to a test sample fatigue tension and compression loading test device and an installation method. The test device comprises a sample connecting flange platform, a ring-shaped structure and a test device, wherein the ring-shaped structure is sleeved on the outer side of the circumference of a sample and is in threaded connection with the outer side of the circumference of the sample; the testing machine is connected with the flange platform, one end of the flange platform is connected with the testing machine, and the other end of the flange platform abuts against the axial end part of the test sample and is used for transferring load to the test sample; and the compressing structure is used for driving the sample connecting flange platform to compress one side of the testing machine connecting flange platform so that the axial end part of the sample is tightly abutted on the testing machine connecting flange platform to eliminate the thread gap between the sample and the sample connecting flange platform. The testing device provided by the invention is simple in structure and convenient to operate, can well eliminate the thread clearance between the sample and each component, increases the connection rigidity between the sample and each component, ensures the resonance of the resonance system of the fatigue testing machine, and has great popularization value.
Description
Technical Field
The invention relates to the technical field of metal material fatigue performance test device structures, in particular to a test sample fatigue tension and compression loading test device and an installation method.
Background
When a material sample is subjected to a high-cycle fatigue test, the test is usually performed on a high-frequency fatigue testing machine in order to shorten the test period and save the test cost. The high-frequency fatigue testing machine applies high-frequency load to the sample to perform fatigue test through resonance generated among the sample, the clamp and the resonance system. The high-frequency fatigue testing machine requires that the sample and the clamp are rigidly connected, and no gap can be generated, otherwise, the resonance of the testing machine is influenced, so that the test cannot be carried out.
Before fatigue test, two ends of a sample are clamped and fixed, fatigue load is applied to one end of the sample, and the direction of the applied load comprises tensile load, compressive load and tensile load according to the test purpose. The fatigue load waveform includes a positive sine wave, a triangular wave, and the like, depending on the purpose of the test. The tensile load, the tensile load and the compression load are always unchanged in load direction in the test process, so that the load is always kept between the clamping parts at the two ends of the sample and the clamp in any instant process in the test, no gap is generated, and the sample and the clamp are rigidly connected, so that the resonance of a fatigue testing machine system is not influenced. In the tensile-compressive load test, if the portions to which tensile and compressive loads are applied at both ends of the sample cannot be rigidly connected to the clamps at the same time at the moment when the direction of the tensile-compressive load changes due to repeated changes in the direction of the load, a gap may be generated between the sample and the clamps at the moment when the direction of the load changes, which affects the resonance of the fatigue testing machine system, and thus the fatigue test cannot be performed.
In order to eliminate the clearance, the Chinese invention patent named as 'a high-temperature tensile-compression fatigue test clamp for a round bar test piece' with the patent number of 'CN 108548716B' introduces a tensile-compression fatigue test clamp, a hydraulic clamping head of a fatigue machine in the clamp clamps an optical bar end of a connecting rod and is connected with an adapter through threads, and a sleeve is directly sleeved into the adapter; the lower half part of the threaded section of the test piece is connected with the adapter through threads, and the upper half part of the threaded section of the test piece is connected with the pressure-bearing disc through threads and is screwed down under certain tension; the short bolts are screwed into the circumferential threaded holes of the pressure-bearing disc, and the lower ends of the short bolts are in contact with the top end of the sleeve, so that thread gaps are eliminated. The clamp disclosed in this patent can eliminate the thread gap to some extent, but is limited to the case where the sample is subjected to a tensile force, and when the sample starts to be subjected to a compressive force, the applied compressive force is opposite to the force applied to the sample by the pressure-bearing disc, and a thread gap between the pressure-bearing disc and the sample may be caused. Therefore, there is a high necessity for a jig structure capable of eliminating the backlash in the axial direction of the test piece.
Disclosure of Invention
The invention aims to solve the defects of the background technology and provides a sample fatigue tension-compression loading test device and a mounting method.
The technical scheme of the invention is as follows: a test device for fatigue tension-compression loading of a test sample comprises,
the sample connecting flange platform is sleeved on the outer side of the circumference of the sample and is of an annular structure in threaded connection with the outer side of the circumference of the sample;
the testing machine is connected with the flange platform, one end of the flange platform is connected with the testing machine, and the other end of the flange platform abuts against the axial end part of the test sample and is used for transferring load to the test sample;
the pressing structure is sleeved outside the sample connecting flange table and the testing machine connecting flange table and is used for driving the sample connecting flange table to press towards one side of the testing machine connecting flange table;
when the compaction structure compacts the sample connecting flange table and the testing machine connecting flange table, an axial gap is reserved between the sample connecting flange table and the testing machine connecting flange table.
The pressing structure further comprises a pressing plate; the pressure disk is for the cover locate the annular structure in the testing machine flange platform outside, and pressure disk upper end and sample flange platform are fixed connection in the axial, and pressure disk lower extreme inboard is through helicitic texture and testing machine flange platform threaded connection.
A circle of inner side bosses protruding inwards along the radial direction are arranged on the inner side of the upper end of the pressure plate; the inner side boss is used for being abutted to the sample connecting flange table to enable the pressure plate and the sample connecting flange table to be fixed in the axial direction.
A circle of gears which are protruded outwards along the radial direction are fixed on the outer side of the lower end of the pressure plate; and a driving structure for driving the gear to rotate around the axis is arranged between the gear and the connecting flange platform of the testing machine.
The driving structure further comprises a supporting table fixed on the outer side of the circumference of the connecting flange table of the testing machine; the supporting table is provided with upright posts which are vertically arranged; a screwing rod capable of rotating around the axis of the upright column penetrates through the upright column; one end of the wrenching rod is provided with a bayonet which is meshed with the gear.
The test device further comprises a pressure-bearing flange table which is pressed between the sample connecting flange table and the testing machine connecting flange table in the axial direction; and one end of the pressure-bearing flange platform facing the sample is provided with a connecting boss which is raised along the axial direction and is abutted against the sample.
A positioning pin protruding along the axial direction is arranged at one end of the pressure-bearing flange table facing the connecting flange table of the testing machine; the positioning pin is inserted into a positioning hole in the bottom of a counter bore in the end part of the connecting flange table of the testing machine and used for limiting the movement of the pressure-bearing flange table and the connecting flange table of the testing machine in the non-axial direction.
Further both sides of testing machine flange platform are provided with two sets of brace tables, and two sets of brace tables use the axis as central symmetry and arrange.
A method for installing a fatigue tension-compression loading test device for a sample includes screwing cylindrical surfaces at two ends of the sample into an inner threaded hole of a sample connecting flange table, fixing the connecting flange table of the test machine on the test machine, placing the sample assembled with the connecting flange table of the test machine on the connecting flange table of the test machine, enabling an axial end portion of the sample to abut against a pressure-bearing flange table in a sunken hole at the end portion of the connecting flange table of the test machine, sleeving a pressure plate on the outer side of the circumference of the connecting flange table of the test machine, pressing the connecting flange table of the test sample, the pressure-bearing flange table and the connecting flange table of the test machine through a rotary pressure plate, eliminating a thread gap between the connecting flange table of the sample and the sample, and starting a fatigue tension-compression loading test.
Further, the method for eliminating the thread clearance between the sample connecting flange platform and the sample comprises the following steps: the method comprises the steps of firstly reversely rotating a pressure plate to enable the pressure plate, a sample connecting flange table, a pressure bearing flange table and a testing machine connecting flange table to be in a loose state, rotating a sample to enable the end part of the sample to be tightly abutted against the pressure bearing flange table until axial reverse acting force is generated to act on the sample connecting flange table and the pressure plate, enabling a gap to be reserved between the sample connecting flange table and the testing machine connecting flange table, and then forwardly rotating the pressure plate until the pressure plate is completely locked, so that a thread gap between the sample connecting flange table and the sample is eliminated.
The invention has the advantages that: 1. the end part of the test sample directly abuts against the end part of the connecting flange table of the testing machine, the test sample connecting flange table and the connecting flange table of the testing machine are compressed through the compression structure, the reaction force generated by the test sample abutting against the end part of the connecting flange table of the testing machine can eliminate the thread clearance between the test sample and the connecting flange table of the test sample far away from the connecting flange table of the testing machine along the axial direction, the thread clearance between the test sample and the connecting flange table of the testing machine along the axial direction can be eliminated by compressing the connecting flange table of the test sample and the connecting flange table of the testing machine, thus the thread clearance between the test sample and the connecting flange table of the test sample can be eliminated, the transmission of the moment can be well carried out no matter whether the tensile loading test or the compression loading test or the tensile-compression loading test is carried out, and the connecting rigidity between the testing device and the test sample is effectively improved, the resonance of the resonance system of the fatigue testing machine is ensured;
2. according to the invention, the sample connecting flange table and the testing machine connecting flange table are pressed together through the pressure plate to form a stable rigid connecting structure, so that the operation and installation are convenient, and the thread clearance between the sample and the clamp can be effectively eliminated;
3. according to the invention, the inner side boss at the inner side of the upper end of the pressure plate hooks the outer side boss at the outer side of the sample connecting flange table to form an axial compression connecting structure, so that an axial compression acting force can be conveniently generated on the sample connecting flange table through the pressure plate, the sample connecting flange table can be conveniently dismounted from the lower end of the pressure plate during dismounting, and the mounting operation is very convenient;
4. according to the invention, the circle of gear is arranged on the pressure plate, and the pressure plate is driven to rotate around the axis by the gear connection driving structure, so that the compression and the loosening of the connecting flange table of the testing machine are realized, and the gear is also convenient for the locking operation of the connecting flange table of the testing machine;
5. according to the invention, the support table is arranged on the connecting flange table of the testing machine, the twisting rod is arranged on the support table, and the twisting rod is utilized to drive the gear to rotate, so that the driving of the pressure plate is convenient, and the operation is simple;
6. according to the invention, the pressure-bearing flange plate is arranged between the sample connecting flange platform and the testing machine connecting flange platform, is used for bearing the sample connecting flange platform and the testing machine connecting flange platform and simultaneously tightly supports the end part of a sample, and plays a good role in load transfer;
7. the pressure-bearing flange table is connected with the positioning hole in the connecting flange table of the testing machine through the positioning pin, so that the pressure-bearing flange table is convenient to mount;
8. the two groups of supporting tables are arranged on the connecting flange table of the testing machine, and both the two groups of supporting tables can drive the gear, so that the gear can be conveniently operated, and the operation can be carried out in a mode of changing edges under the condition of narrow space;
9. the connection mode of the test device and the test sample is very convenient, the clearance between the test sample and each part of the test device can be well eliminated by screwing the test sample and the pressure plate, and the fatigue tension-compression loading test is conveniently carried out;
10. the invention eliminates the thread clearance in two directions by respectively screwing the test sample and the pressure plate, and the operation mode is extremely simple.
The testing device provided by the invention is simple in structure and convenient to operate, can well eliminate the thread clearance between the sample and each component, increases the connection rigidity between the sample and each component, ensures the resonance of the resonance system of the fatigue testing machine, and has great popularization value.
Drawings
FIG. 1: the invention of the test device shaft view;
FIG. 2: the test device of the invention is a schematic sectional view;
FIG. 3: a top view of the experimental set-up of the invention;
FIG. 4: a cross-sectional view of a sample connection flange stage of the present invention;
FIG. 5: the invention relates to a section view of a connecting flange table of a testing machine;
FIG. 6: the cross section of the pressure plate is schematic;
FIG. 7: the invention relates to a section schematic diagram of a pressure-bearing flange table;
wherein: 1-sample; 2, connecting a sample with a flange table; 3, connecting the testing machine with a flange table; 4, pressing a plate; 5, inner side boss; 6-gear; 7, supporting the table; 8, a column; 9-wrenching and twisting the rod; 10, bayonet; 11-a pressure-bearing flange table; 12-connecting a boss; 13-outer boss; 14-a positioning pin; 15-positioning holes.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The invention is described in further detail below with reference to the figures and the specific embodiments.
As shown in fig. 1-7, this embodiment relates to a sample fatigue tension and compression loading test device, the test device of this embodiment is arranged at two ends of test 1 respectively, and corresponds to two sets of fatigue testing machines, this embodiment is explained with a set of test device, as shown in fig. 2, the test device is from top to bottom (when in actual use, there is no upper and lower part, for convenience of explanation, the upper and lower direction in fig. 2 is set as the upper and lower direction of the test device, actually, the axial direction of the sample), and the test device includes pressure plate 4, sample connection flange platform 2, pressure-bearing flange platform 11, test device connection flange platform 3 in turn, test device connection flange platform 3 connects the test machine, the tension and compression load generated by the test machine is transmitted to sample 1 through test device connection flange platform 3. Sample flange platform 2 is the telescopic structure of annular, and the internal thread has been seted up to the inboard, corresponds with the external screw thread in the 1 tip circumference outside of sample, links firmly as an organic whole through threaded connection structure and sample flange platform 2. The pressure plate 4 is sleeved on the outer sides of the circumferences of the sample connecting flange platform 2 and the testing machine connecting flange platform 3, and the pressure-bearing flange platform 11 is positioned between the sample connecting flange platform 2 and the testing machine connecting flange platform 3.
Specifically, as shown in fig. 4, the sample connection flange stage 2 of the present embodiment is of an annular structure, the inner side of the sample connection flange stage is sleeved on the external thread of the outer end face of the circumference of the sample 1 through an internal thread structure (the chamfer on the side portion of the upper end of the sample connection flange stage 2 is convenient for centering and guiding when the pressure plate 4 is installed, and is convenient for installation, the chamfer is arranged on the upper end of the pressure plate 4, so that the tightness of the gap between the circumferential joint portions of the pressure plate 4 and the flange stage 2 can be observed conveniently), and the sample connection flange stage 2 and the sample 1 are fixedly connected into a whole through a thread connection mode. The outer side of the sample connecting flange platform 2 is provided with a circle of outer bosses 13 which are protruded outwards along the radial direction. The inner side end face of the joint of the pressure plate 4 and the sample connecting flange table 2 is provided with a circle of inner side bosses 5 protruding inwards along the radial direction, the inner side bosses 5 correspond to the outer side bosses, the lower end faces of the inner side bosses 5 are abutted to the upper end faces of the outer side bosses 13, and when the pressure plate 4 is compressed, axial compression acting force is applied to the sample connecting flange table 2 through the inner side bosses 5.
As shown in fig. 7, which is a schematic structural diagram of the pressure-bearing flange table 11 of this embodiment, the pressure-bearing flange table 11 is a block structure located between the sample connection flange table 2 and the test machine connection flange table 3, a counter bore is formed in an end portion of the test machine connection flange table 3 far away from the connection with the test machine connection flange table, the pressure-bearing flange table 11 is disposed in the counter bore, a lower end face of the pressure-bearing flange table 11 abuts against the bottom of the counter bore, an upper end of the pressure-bearing flange table is provided with a connection boss 12 protruding in the axial direction, and an axial upper end of the connection boss 12 abuts against an end portion of the sample 1. The central position of the lower end face of the pressure-bearing flange table 11 is provided with a positioning pin 14 protruding along the axial direction, the bottom of a counter bore of the testing machine connecting flange table 3 is provided with a positioning hole 15 (as shown in fig. 5) corresponding to the positioning pin 14, during installation, the positioning pin 14 is inserted into the positioning hole 15, the pressure-bearing flange table 11 can be conveniently arranged in the counter bore, and non-axial relative displacement between the pressure-bearing flange table 11 and the testing machine connecting flange table 3 is limited.
As shown in fig. 6, the circumference outside of sample flange platform 2 and testing machine flange platform 3 is located to pressure disk 4 cover of this embodiment, the internal thread structure has been seted up to pressure disk 4's lower extreme inboard, the circumference outside of testing machine flange platform 3 is provided with the external screw thread structure, pressure disk 4 links firmly as an organic whole through screw thread structure and testing machine flange platform 3, the upper end of pressure disk 4 compresses tightly through inboard boss 5 and the outside boss 13 of sample flange platform 2, pressure disk 4 compresses tightly sample flange platform 2 and testing machine flange platform 3 together like this. In order to facilitate the rotation of the pressure plate 4, a circle of gear 6 which protrudes outwards in the radial direction is fixed on the outer side of the lower end of the pressure plate 4, a supporting table 7 is arranged on the outer side of the circumference of the connecting flange table 3 of the testing machine, a vertical column 8 which is vertically arranged is installed on the supporting table 7, a pulling and twisting rod 9 which can rotate around the axis of the vertical column 8 penetrates through the vertical column 8, and a bayonet 10 which is meshed with the gear 6 is arranged at one end of the pulling and twisting rod 9. Bayonet 10 block is on gear 6, then uses stand 8 as the pivot, and rotatory twisting rod 9 of pulling drives gear 6 and rotates, drives pressure disk 4 and rotates on testing machine flange platform 4, realizes compressing tightly or the pine of 3 to testing machine flange platforms.
This embodiment is provided with two sets of brace tables 7 in the circumference outside of testing machine flange platform 3, and two sets of brace tables 7 use the axis to arrange as central symmetry, the convenient rotation operation to gear 6.
In the specific test: the cylindrical surfaces at two ends of a test sample 1 are screwed into the internal thread holes of the test sample connecting flange platform 2, the test sample connecting flange platform 3 is fixed on a test machine through bolts, then the test sample 1 assembled with the test sample connecting flange platform 2 is placed on the test machine connecting flange platform 3, the axial end part of the test sample 1 is abutted against a pressure-bearing flange platform 11 in a sunk hole at the end part of the test sample connecting flange platform 3, a pressure plate 4 is sleeved outside the circumference of the test machine connecting flange platform 3, the pressure plate 4 is firstly rotated reversely, the pressure plate 4, the test sample connecting flange platform 2, the pressure-bearing flange platform 11 and the test machine connecting flange platform 3 are in a loose state, the test sample 1 is rotated, the end part of the test sample 1 is abutted against the pressure-bearing flange platform 11 until an axial reverse acting force is generated to act on the test sample connecting flange platform 2 and the pressure plate 4, a gap is left between the pressure plate 4 and the test sample connecting flange platform 3 (the gap is convenient for the later-pressing process, there is removal space sample flange platform 2 to 3 one sides of test machine flange platform to in the screw thread clearance to between sample flange platform 2 and the sample 1 is eliminated), forward rotation pressure disk 4 again, eliminate the clearance until pressure disk 4 and test machine flange platform 3 lock completely, eliminated the screw thread clearance between sample flange platform 2 and the sample 1, begin to carry out fatigue and draw and press the loading test.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a sample fatigue draws presses loading test device which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the sample connecting flange platform (2) is sleeved on an annular structure which is connected with the outer side of the circumference of the sample (1) through external threads;
the testing machine is connected with the flange table (3), one end of the flange table is connected with the testing machine, and the other end of the flange table abuts against the axial end of the test sample (1) and is used for transferring load to the test sample (1);
the compaction structure is sleeved on the outer sides of the sample connecting flange table (2) and the testing machine connecting flange table (3) and is used for driving the sample connecting flange table (2) to compact towards one side of the testing machine connecting flange table (3);
when the compaction structure compacts the sample connecting flange table (2) and the testing machine connecting flange table (3), an axial gap is reserved between the sample connecting flange table (2) and the testing machine connecting flange table (3).
2. A specimen fatigue tension-compression loading test device as claimed in claim 1, wherein: the pressing structure comprises a pressing plate (4); the pressure disk (4) is an annular structure sleeved on the outer side of the connecting flange table (3) of the testing machine, the upper end of the pressure disk (4) is fixedly connected with the sample connecting flange table (2) in the axial direction, and the inner side of the lower end of the pressure disk (4) is in threaded connection with the connecting flange table (3) of the testing machine through a threaded structure.
3. A specimen fatigue tension-compression loading test device as claimed in claim 2, wherein: a circle of inner side bosses (5) protruding inwards in the radial direction are arranged on the inner side of the upper end of the pressure plate (4); the inner side boss (5) is used for being abutted against the sample connecting flange table (2) to enable the pressure plate (4) and the sample connecting flange table (2) to be fixed in the axial direction.
4. A specimen fatigue tension-compression loading test device as claimed in claim 2 or 3, wherein: a circle of gears (6) which are protruded outwards along the radial direction are fixed on the outer side of the lower end of the pressure plate (4); and a driving structure for driving the gear (6) to rotate around the axis is arranged between the gear (6) and the connecting flange platform (3) of the testing machine.
5. The test piece fatigue tension-compression loading test device as claimed in claim 4, wherein: the driving structure comprises a supporting table (7) fixed on the outer side of the circumference of the connecting flange table (3) of the testing machine; the supporting platform (7) is provided with vertical columns (8); a wrenching rod (9) which can rotate around the axis of the upright post (8) penetrates through the upright post (8); one end of the wrenching rod (9) is provided with a bayonet (10) which is meshed with the gear (6).
6. A specimen fatigue tension-compression loading test device as claimed in claim 1, wherein: the test device is characterized by also comprising a pressure-bearing flange table (11) which is pressed between the sample connecting flange table (2) and the test machine connecting flange table (3) in the axial direction; and one end of the pressure-bearing flange platform (11) facing the sample (1) is provided with a connecting boss (12) which is raised along the axial direction and is abutted against the sample (1).
7. The test piece fatigue tension-compression loading test device as claimed in claim 6, wherein: one end of the pressure-bearing flange platform (11) facing the connecting flange platform (3) of the testing machine is provided with a positioning pin (14) protruding along the axial direction; the positioning pin (14) is inserted into a positioning hole (15) at the bottom of a counter bore at the end part of the connecting flange platform (3) of the testing machine and used for limiting the movement of the pressure-bearing flange platform (11) and the connecting flange platform (3) of the testing machine in the non-axial direction.
8. The test piece fatigue tension-compression loading test device as claimed in claim 5, wherein: the two sides of the testing machine connecting flange table (3) are provided with two groups of supporting tables (7), and the two groups of supporting tables (7) are symmetrically arranged by taking the axis as the center.
9. A method for mounting a sample fatigue tension and compression loading test device according to claim 1, wherein: the method comprises the steps of screwing cylindrical surfaces at two ends of a sample (1) into internal threaded holes of a sample connecting flange platform (2), fixing the connecting flange platform (3) of the testing machine on the testing machine, placing the sample (1) provided with the sample connecting flange platform (2) on the connecting flange platform (3) of the testing machine, enabling the axial end part of the sample (1) to abut against a pressure-bearing flange platform (11) in a sunk hole at the end part of the connecting flange platform (3) of the testing machine, sleeving a pressure plate (4) on the outer side of the circumference of the connecting flange platform (3) of the testing machine, pressing the sample connecting flange platform (2) by a rotary pressure plate (4), pressing the pressure-bearing flange platform (11) and the connecting flange platform (3) of the testing machine, eliminating a threaded gap between the sample connecting flange platform (2) and the sample (1), and starting a fatigue tension-compression loading test.
10. The method for mounting the sample fatigue tension and compression loading test device according to claim 9, wherein: the method for eliminating the thread clearance between the sample connecting flange platform (2) and the sample (1) comprises the following steps: first contra-rotation pressure disk (4), make pressure disk (4), sample flange platform (2), pressure-bearing flange platform (11) and testing machine flange platform (3) are in lax state, rotatory sample (1), make sample (1) tip support pressure-bearing flange platform (11), until producing axial reverse effort to use on sample flange platform (2) and pressure disk (4), make and leave the clearance between sample flange platform (2) and testing machine flange platform (3), forward rotation pressure disk (4) until locking completely again, the screw thread clearance between sample flange platform (2) and sample (1) has been eliminated.
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| CN202111540998.0A CN114323924A (en) | 2021-12-16 | 2021-12-16 | Sample fatigue tension and compression loading test device and installation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115290304A (en) * | 2022-05-20 | 2022-11-04 | 天津大学 | Large-scale structure fatigue sample clamping device |
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| CN115290304B (en) * | 2022-05-20 | 2024-04-12 | 天津大学 | Large-scale structure fatigue test sample clamping device |
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Application publication date: 20220412 |