High frequency fatigue testing machine
The high-frequency fatigue testing machine is used to measure the fatigue characteristics and fatigue of metal, alloy materials and their components (such as operating joints, fixed parts, spiral moving parts, etc.) at room temperature under tensile, compression or tensile and compression alternating load Life, prefabricated cracks and crack propagation tests. After equipped with corresponding test fixtures, the high-frequency fatigue testing machine can carry out three-point bending test, four-point bending test, thin plate tensile test, thick plate tensile test, reinforced steel strip tensile test, chain tensile Test, fixed part test, connecting rod test, torsional fatigue test, bending-torsion composite fatigue test, interactive bending fatigue test, CT test, CCT test, gear fatigue test.
General: Test equipment, which can achieve the following relevant test standards: JJG 556-1988 Axial loading fatigue testing machine verification method HB 5287-1996 Metal material axial loading fatigue test method GB / T 6395-2000 metal material fatigue crack growth rate test Method GB / T 4161-1984 Metallic material plane strain fracture toughness KIC test method GB / T 2038-1991 metallic material ductile fracture toughness JIC test method
Host:
1. Peak power of power supply: ≤10 KW (including peripheral devices such as cooling and high-temperature devices);
2. Should be equipped with corresponding UPS uninterruptible power supply;
3. The width of the effective test work space: ＞ 680 mm, depth: ＞ 860 mm;
4. Moving range of beam: ≥300mm;
5. One-way maximum tensile or compression static load: not less than ± 100kN;
6. Maximum tensile and compression alternating load: not less than ± 50kN;
7. Dynamic and static loading system, suitable for load 0 ～ 100KN (force value sensor should have advanced acceleration dynamic compensation);
8. Static accuracy of the sensor: within the load range, not more than 0.5% of the load indication value;
9. The dynamic accuracy of the sensor: within the load range, not more than 0.5% of the load indication;
10. Frequency range: 50 ～ 300Hz (frequency can be greater than 300Hz);
11. The maximum distance between the lower fixture and the upper fixture should be: not less than 700mm;
12. The coaxiality of the upper and lower chucks: no more than 10%;
13. Displacement measurement and control accuracy: not more than 0.5% of the indicated value.
Wedge-shaped fixtures and accessories are used to hold flat and round specimens at room temperature, and corresponding clamping blocks should be configured to ensure the use of the following specimens:
1. The thickness of the flat sample a: 0.2 ～ 20mm;
2. The diameter of the circular sample: 2 ～ 20mm.
Room temperature thread fixture
1. Samples for round thread joints at room temperature;
2. Configure the internal threaded joints of the following specifications to meet the use of external threaded specimens of the same specifications: M8 × 1, M11 × 1, M14 × 1, M16 × 1, M22 × 1, M32 × 1;
Metal material fatigue crack growth rate (da / dN) test fixture and accessories: should meet the following sample test requirements: Sample size B (thickness) × W (width): 20 × 80mm.
Fracture mechanics CT (compact tensile) specimen fixtures and accessories: should meet the following specimen test requirements: CT (compact tensile) specimen size B (thickness) × W (width): 12.5 × 25mm.
Strain extensometer and accessories
1. Static accuracy: not more than 0.5% of the indicated value;
2. Dynamic accuracy: not more than 1% of the indicated value;
3. Gage length: 25mm; 4) Strain range: ~ 10%.
Displacement type (COD gauge) extensometer and accessories
1. Dynamic accuracy: not greater than the indicated value? 0.5%;
2. The data collection rate meets the maximum test frequency requirement during the test;
3. The deformation range is not less than 2.5 mm. 4.2.8 The standard high-temperature device is used for high-temperature fatigue test of metals at 100 ℃ ～ 1200 ℃.
Heating furnace
1. Adopt folio heating furnace, stainless steel shell;
2. The heating furnace is easy to install in the rack space and leave enough space;
3. Size range of heating furnace: length / width / height are 250 ～ 400mm / 150 ～ 300mm / 150 ～ 300mm;
4. Furnace inner diameter ≥80mm
5. The length of the mean tropical zone ≥50mm (temperature fluctuation within the mean tropical zone ≤ ± 5 ℃, temperature gradient ≤5 ℃);
6. Surface temperature of furnace shell ≤ room temperature + 50 ℃.
Temperature measurement and control device
1. Temperature measurement accuracy ≤ ± 1 ℃, and room temperature automatic cold junction temperature compensation deviation ≤0.50C;
2. Temperature control accuracy ≤ ± 1 ℃;
3. The overshoot of the temperature rise ≤5 ℃;
4. The independent control panel should be simple and clear, with manual and automatic PID temperature control settings;
5. Computer-controlled temperature setting, real-time temperature data collection and temperature rise process graph display.
High temperature fixture
1. Used in conjunction with the heating furnace for round thread joint samples and plate fatigue samples at high temperatures;
2. Configure M16 internal thread joint to meet the use of external thread specimens of the same specifications;
3. Configure the corresponding fixture to meet the use of 0.5 to 2mm thick plate samples;
4. During the high temperature test, the safety of the test and equipment should be ensured to be carried out normally. If it is necessary to cool the fixture connection, a circulating water cooling system should be provided.
The main function:
1. The measurement and control and acquisition system of the equipment should have complete and fully functional related hard and soft accessories, with load, displacement and strain control methods;
2. Manual fast and slow adjustment function of the position of the beam;
3. Arbitrary setting function of beam speed;
4. The beam can be locked in time during the test, otherwise there should be corresponding protection settings during the test;
5. The equipment can automatically and manually control and adjust relevant parameters, such as system gain, phase, feedback response, excitation, etc., through the advanced computer application software to produce the best test frequency response effect;
6. Closed-loop digital intelligent control and acquisition by computer, running on stable WINDOS / XP platform, multiple control modes (load, displacement, strain, function) online automatic conversion, with a separate remote control panel;
7. The software should have dynamic information such as automatic calibration test machine accuracy, automatic zero adjustment, real-time display of force value (stress), deformation, strain and calculation, etc .;
8. When the predetermined condition or protection state is reached, it has the functions of automatically storing test data and safe shutdown;
9. There are various test methods for the safe stop and pause function of the criterion of breaking or failure;
10. Test data and results should be in international units and can be automatically converted with other engineering units;
11. Test data storage, retrieval and statistical analysis functions;
12. Test data can be transmitted and shared on the authorized network, and authorized remote measurement and control;
13. Support user-defined formula input mode, the software has online help and version upgrade function;
14. The user can easily and accurately set the real-time static dynamic load, displacement, number of cycles, test frequency and strain variable and other parameters according to the test requirements, and display the dynamic test data and curve in real time;
15. Test software can automatically generate test results, statistical analysis test reports, automatically store test data results, and can be transmitted and shared with corresponding third-party data processing application software (such as EXCEL, etc.);
16. There is an emergency brake switch for safety control;
17. The operation adopts man-machine dialogue mode, and the interface adopts Chinese or English.
Equipment configuration and accessories
1. One set of host.
2. 1 set of wedge clamps and accessories.
3. One set of room temperature screw clamps.
4. A set of test fixtures and accessories for fatigue crack growth rate (da / dN) of metal materials.
5. A set of fracture mechanics CT (compact tensile) sample fixtures and accessories.
6. Strain extensometer and 1 set of accessories.
7. Displacement type (COD gauge) extensometer and 1 set of accessories.
8. 1 set of standard high temperature device.
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