Do you know what precautions are there when operating the hydraulic universal testing machine?

First of all, this [1] kind of testing machine equipment should avoid direct sunlight as much as possible, pay attention to frequent maintenance in order to prolong the service life, and the operating procedures in use are as follows:

1. Connect the power cord and press the "Power" button, the indicator light will be on.

2. Select the measuring range according to the sample specifications, hang or remove the stone on the pendulum, and adjust the buffer handwheel if necessary.

3. According to the shape and size of the sample, the corresponding jaws are loaded into the upper and lower jaw seats.

4. On the drum of the delineator, roll up the recording paper (graph paper).

5. Start the oil pump and unscrew the oil supply valve to make the platen rise by about 10mm, and then close the oil supply valve. If the platen is already in the raised position, you don't have to start the oil pump first, just close the oil supply valve.

6. Clamp one end of the specimen in the upper jaw, and press the "tightening" button on the control box to clamp the specimen for the model equipped with a hydraulic chuck.

7. When the platen has risen and the oil supply and return valves are closed, adjust the indicator to the zero point of the dial. (It should be operated without pressurization).

8. Start the lifting motor to adjust the tensile test space, and clamp the specimen vertically. For models with hydraulic chucks, press the "Down" button on the control box to clamp the specimen vertically.

9. Put down the drawing pen of the putter and enter the drawing state.

10. According to the afterburner speed required by the test, slowly unscrew the oil supply valve for afterburner test. Close the oil supply valve after the specimen breaks. If the interval between the next set of tests is long, the oil pump should also be stopped.

11. Lift the pen that records the value.

12. After opening the oil return valve, dial the driven needle back to the zero point.

13. Remove the broken sample. For models equipped with hydraulic chucks, press the "Release" button to release the upper jaws, and then press the "Release" button to release the lower jaws to remove the broken specimens respectively.

1. Pay attention to the sequence of switching on and off; 2. Pay attention to the software installation environment; 3. Observe whether the indication value is displayed; 4. Other points to note: The key parts of the testing machine (such as: jaws, gearbox, etc.) should be frequently filled with lubricating grease.

The computer should be kept in a dry and ventilated room. If it is not used for a long time, it should be powered on once a month. This is what our Shanghai Hualong master often teaches newcomers to use, over and over again, everyone is familiar with the heart, so our after-sales service has never been a big problem.

In the past, I used to do product testing in a lot of contact, such as the boot sequence, the software installation environment, the computer in a dry and ventilated environment, etc., but now I don't remember much...

When the hydraulic universal testing machine is operated, the following matters need to be paid attention to:

Safe operation: When operating the hydraulic universal testing machine, it is necessary to ensure that there are no dangerous goods around, wear safety equipment, and ensure that the testing machine is in a stable working state.

Operation experience: Operating a hydraulic universal testing machine requires certain experience and skills, and there should be professional guidance during the first operation.

Correct use: Ensure that the hydraulic universal testing machine is used in accordance with the standard specifications and that the correct test fixtures are used to avoid errors in the test data.

Regular calibration: Calibrate the hydraulic universal testing machine regularly to ensure the accuracy of the test results.

Maintenance: Regularly maintain the hydraulic universal testing machine to ensure the long-term safe operation of the testing machine.

The above are the matters that need to be paid attention to when operating the hydraulic universal testing machine, in order to ensure the accuracy of the test data and the safety of operation, please be sure to follow the above requirements.

<>1. Connect the power cord and press"Power supply"button, the indicator light is on. 2. According to the sample, select the measurement range, hang or remove the thallium on the pendulum rod, and adjust the conversion handle of the buffer valve. 3. According to the shape and size of the sample, the corresponding jaws are loaded into the upper and lower jaw seats.

4. On the drum of the delineator, roll up the recording paper (graph paper), which is only needed when necessary. 5. Start the oil pump with the oil pump and unscrew the oil supply valve to make the test bench rise about 10 mm, and then close the oil supply valve, if the test bench has been in the rising position, you don't have to start the oil pump to deliver the oil first, only close the oil supply valve. 6. Clamp one end of the specimen in the upper jaw (if the specimen is heavier, the balance thallium needs to be adjusted).

7. Start the oil pump to adjust the indicator to the zero point of the accuracy dial. 8. Start the motor, lift the lower jaw to an appropriate height, and clamp the other end of the sample in the lower jaw (care should be taken to make the sample vertical). 9. Put the depiction pen of the push rod under the travel to enter the state of preparation for depiction (only carry out and match the depiction scale when necessary).

10. According to the loading speed required by the test, slowly unscrew the oil supply valve for the loading test. 11. After the sample is broken, close the oil supply valve and stop the oil pump from working. 12. Pick up the pen that records the value.

13. After opening the oil return valve and unloading, dial the driven needle back to the zero point. 14. Peb takes off the broken sample. 15. Compression and bending tests can be operated with reference to the above items.

What is the specific content of the maintenance and maintenance of the hydraulic universal testing machine, the following Zhongda Consulting will answer for you.

1) All parts of the testing machine should be wiped clean frequently, and the surface without painting should be wiped clean with a small amount of oil with gauze to prevent rust. In the rainy season, it should be wiped and oiled, and when not in use, it should be covered to prevent dust from entering.

2) All door covers on the dynamometer should not be opened frequently, so as not to dust enter the interior and affect the transmission performance of the precision part, and it is forbidden for non-operators to fiddle with it casually to avoid accidents.

3) When the test is suspended, the oil pump motor should be turned off, and it should not be idled, so as not to waste electricity and wear the rotating parts in the pump.

4) Through the grease nozzle located at the base, move the rotating part of the transmission screw of the cross beam in contact with the base. Attention should be paid to sobbing and slipping frequently to avoid wear and tear hindering rotation; The surface of the screw should be coated with new grease frequently.

5) The ball bearings at both ends of the spindle in the dynamometer and the rolling bearings in the pointer structure are flat and should not be lubricated with oil, so as not to produce oil pollution over time and hinder the sensitivity of the mechanism. During maintenance, wash and dry with kerosene, and inject a small amount of high-quality lubricating oil (such as 1 spindle oil) to prevent rust.

6) The fuel tank should be checked frequently, and if the oil level of the fuel tank is found to be lower than the high oil window, it should be made up to the sinking oil level.

7) The screws for fixing the guide pressure plate on the hydraulic clamping device, as well as the pressure plate fixing screws on both sides of the jaw, must be checked frequently to prevent loosening.

Main parameters of hydraulic universal testing machine:

Taking the 600KN testing machine in the conventional equipment as an example, the common equipment with grade 1 accuracy can meet the requirements of relevant national standards, and several other manufacturers may need a higher level, such as grade accuracy. Other customized products are not examples here due to the different requirements of various industries.

1. Maximum test force: 600kN;

2. Test force measurement range: 2%-100%FS;

3. Test force indication accuracy: 1%;

4. Maximum stretching space: 500mm;

5. Maximum compression space: 400mm;

6. Clamping thickness of flat specimen: 0-15;

7. Clamping diameter of round specimen: 13- 40;

8. The maximum spacing of bending bearings: 400mm;

9. Column spacing: 460mm;

10. Piston displacement indication accuracy: ;

11. Deformation measurement resolution:

12. Deformation measurement accuracy: 1%;

13. Sensor: oil pressure sensor, photoelectric sensor, extensometer;

14. Control mode: electro-hydraulic servo closed-loop control, the control mode can be switched smoothly;

15. Display mode: the computer screen displays the measured values of test force, piston displacement and sample deformation, the screen displays the test curve, and the screen is adjusted and calibrated;

16. Host size: about 730mm 570mm 1845mm;

17. Control cabinet size: 620mm 480mm 1135mm;

18. Weight of the main engine: about 2200kg;

19. Total power: 3kw.

The main configuration of the hydraulic universal testing machine:

1. One main engine of hydraulic universal testing machine.

2. A set of standard oil source for hydraulic universal testing machine.

3. One electro-hydraulic servo all-digital PC controller (including computer).

4. A special PC measurement and control card for the testing machine.

5. A printer.

6. One electro-hydraulic servo valve.

7. A set of electrical control box (integrated with the oil source).

8. A pressure sensor.

9. One extensometer with a gauge distance of 50mm.

10. A set of cylinder piston displacement sensor and connectors.

11. A set of all-digital servo control software.

12. A set of multi-functional test data processing software package (including common test software for tension and compression).

13. A set of pipelines.

14. A set of attachments (spare parts for tension, compression, bending and installation).

Common faults of hydraulic universal material testing machine 1:

When performing a tensile test, the specimen fracture is always broken on both sides. The reason for this phenomenon should first consider whether the main part of the testing machine is installed vertically, if this reason is excluded, and then exclude it from the following three aspects.

1.If the jaws are not clamped properly, the specimen should be clamped symmetrically according to the requirements.

2.The poor quality of the jaws and the damage to the teeth, in addition to affecting the misalignment of the jaws, also make the specimen slip during the test, making the yield point difficult to identify. At this time, the jaws should be replaced.

3. The upper and lower jaws are not concentric, a test rod should be processed, and after the upper and lower jaws are tightened, they should be measured with a dial gauge based on two force columns until the adjustment is qualified.

Common faults of hydraulic universal material testing machine two:

When loading, the oil circuit system leaks seriously or the oil pipe is ruptured. First of all, check whether the joint of the oil circuit system is tightened, and if there is a need to replace the gasket, it should be replaced in time. If the oil pipe is broken, then it is necessary to replace the oil pipe with higher strength, and in addition, it is necessary to observe whether the piston of the oil supply valve and relief valve is dead or reversed.

In short, you should always pay attention to the problems found in the use of the testing machine and eliminate them in time to avoid errors in your test results. It is to regularly check and calibrate the testing machine to ensure the normal use of the hydraulic universal material testing machine. ——Shanghai Youhong Measurement and Control

Mechanical transmission part or circuit board connection.

Maintenance & Maintenance:

1.The grease in the bearings at the upper and lower ends of the lead screw is generally replaced once every 3-5 years.

2.The lead screw and wire mother of the testing machine are lubricated once every six months.

3.Keep the testing machine clean.

Common faults and solutions:

1.If the display is abnormal during the test, turn off the power and power it back on.

2.The running control of the beam failed, and there was no response to the ascent and descent. It could be due to the following reasons:

A: Overload, when the testing machine exceeds the range of each gear, it will be overload protected, so before the test starts, the appropriate gear should be selected according to the maximum load of the sample, or the maximum gear (C *1) test. Care should be taken not to overload the maximum gear (c*1) during the test, otherwise the sensor will be damaged.

During the test, the tester should always be in front of the testing machine and should not leave casually. so as not to cause damage to the testing machine.

b: If the test force and displacement do not change during the test, check whether the connection and socket are good.

c: If abnormal sound is found during the test, stop the machine immediately to check the transmission system.

d: Other faults cannot be eliminated, you can contact the company or deal with it at its discretion.

When using, pay attention to the preheating of the machine for 10 minutes, the piston rises 10mm force value to zero, and the hydraulic oil of the testing machine is selected with special oil! Jinan Bangke testing machine.

The hydraulic universal testing machine is mainly composed of the main engine part, the hydraulic control part, the detection part, the data acquisition processing and control part, the electrical part, the accessories, etc.

1.The main engine part is composed of oil cylinder, working piston, base, workbench, column, up and down moving measurement, specimen clamping and movable beam, etc., and the main function is to tighten and fix the specimen by the specimen clamping mechanism and load the specimen.

2.Data acquisition, processing and control part: mainly composed of data acquisition, processing, control circuits, computer software and hardware systems, printers, manual control devices, etc., the main function is to complete the control of the whole system, the setting of various parameters, display, test process and test knot.

Recording of results, processing and storage of test data, output of test results and other functions.

3.Hydraulic control part: mainly by the oil tank. It is composed of high-pressure oil pump, oil supply valve, oil return valve, electro-hydraulic proportional valve, globe valve, force measuring cylinder piston, main engine working cylinder, working piston and so on. The main function is to control the tightening of the specimen and the loading of the specimen.

4.Detection part: mainly composed of load sensor (pressure sensor), electronic extensometer, photoelectric encoder, etc., the main function is to detect the test force and deformation of the test object and measure the displacement of the movement.

5.Electrical part: its basic components include all kinds of relays, AC contactors, switch buttons, etc., the main function is the switch of the oil pump motor, the action of the control beam lifting mechanism and various limits, overload protection, etc.

6.Accessories: Mainly composed of tensile and compression test fixtures, flexure test accessories and other special test accessories (various jaws, chucks) and so on. Its basic function is to complete a variety of specific tests by changing the fixtures.