Daily maintenance of universal material testing machine - Huaqiang Electronic Network

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First, the maintenance principle

1. Check for oil leakage before starting each time (specific parts such as: oil pipe, various control valves, fuel tank, small piston), whether the bolts (ie, the collective name of each screw) are fastened, whether the electrical is intact; regular inspection, maintenance The integrity of its components.

2. Start warm-up time is not less than 15 minutes.

3. The piston should be lowered to the lowest position each time the test is completed.

4. Clean the garbage in time after shutdown, and test the table for anti-rust treatment.

5. After running for a period of time, the test machine should be inspected and maintained as necessary: ​​the steel plate is added with molybdenum disulfide grade grease once a week; the screw is added twice per month; the chain is checked for tightness for half a year, and the vulcanization is added. Molybdenum extreme pressure grease; regularly apply lubricating oil to sliding parts, apply anti-rust oil to easy-to-rust parts, keep clean and prevent rust.

6. Prevent high temperature, excessive humidity, dust, corrosive media, water and other erosion instruments.

7. Hydraulic oil must be replaced after 2000 hours of work or cumulative work.

8. Periodically check once a year.

9. Record the use.

10. Please start up in strict accordance with the switch sequence in the “Material Practices for Material Testing Machines”. After the equipment is turned on, please warm up for 15 minutes. After the electrical signal is stable, turn it on again. Second, the computer part

11. Do not install other application software on the computer to prevent the test machine operation software from running properly.

12. Before starting the machine, you must check whether the connection line between the computer and the host, the power plug and socket are correct, whether there is looseness, and the correct one can be turned on.

13. Prevent computers from being infected by viruses.

Second, the computer part

1,

Do not install other applications on your computer to prevent the tester operating software from functioning properly.

2,

Before starting the machine, you must check whether the connection line between the computer and the host, the power plug and socket are correct, and if there is any looseness, you can turn it on after confirming the correctness.

3,

Prevent your computer from being infected by a virus.

Third, the test part

1,

After starting the machine, the equipment should be preheated for 15 minutes. After the equipment is stable, test it again.

2,

If you have just turned off the power, you need to turn it on again, and the time interval should not be less than 10 seconds.

3,

The power cord and signal cable cannot be plugged in at any time, otherwise the control components can easily be damaged.

4,

During the test, please do not press the buttons on the hydraulic source panel, operation box and test software.

5,

During the test, do not touch the device and various cables at will, so as not to affect the accuracy of the data.

6,

Select the fixture according to the specific conditions of the test to avoid damage to the fixture.

7,

In the event of a power outage, please turn off the power immediately, and wait until the power supply is stable before starting the sequence. Frequent switching of the power supply can easily damage the inside of the device or the computer.

8,

When the equipment is running, the tester should not leave the equipment. When the personnel leave, please turn off the equipment.

9,

Regularly maintain and maintain the equipment to prevent high temperature, excessive humidity, dust, corrosive media, water, etc. from immersing in equipment or inside the computer.

10.

Do not force test irregular samples to avoid damage to the equipment.

Fourth, host maintenance

1,

Fixtures equipped with equipment should be protected with anti-rust oil.

2,

Do not place heavy objects and hard objects on the test bench surface to avoid damage to the test bench.

3,

Clean the equipment after each test.

4,

A layer of molybdenum disulfide extreme pressure grease (MoS2) is applied to the sliding surface of the inlaid steel plate and the lining plate every week.

5,

Check the screws of the jaws (the clamping part of the beam) before each test. If it is loose, tighten it in time.

6,

Check the tension of the sprocket regularly. If it is loose, re-tension the tensioner.

7,

All moving surfaces on the test machine should be lubricated to reduce wear. For example, the chain transmission mechanism and the lead screw can be coated with molybdenum disulfide extreme pressure grease, and the surface of the test bench is coated with anti-rust oil.

8,

Before each test, check whether the large nut connecting the light bar and the screw is loose. In particular, the looseness of the screw nut will cause the left and right beams to be out of sync, which will cause the lower beam to be stuck (the beam cannot be lifted or lowered). After the looseness is found, the top wire should be removed first and tightened in time. Be careful not to tighten too much to ensure that the screw has a certain gap to rotate. Generally, it can be retracted back to 1/4 turn after tightening.

Five, hydraulic system maintenance

1,

When not testing for a long time, be careful to cut off the power of the main unit. If the device is in the standby state, the transfer switch should be in the “loading” position. If the transfer switch is in the “fast reverse” position, the electromagnetic reversing valve is always energized, which will affect the service life of the component.

2,

It is necessary to regularly check whether the hydraulic system has oil leakage. The specific method is to load 80% of the full scale of the equipment and keep it for 10 minutes. If the equipment is found to have oil leakage or oil leakage, please replace the hydraulic components and seal components here. .

3,

Always check the change of the tank level (observe the cursor on the hydraulic source). If the oil level is lower than 3/4 of the oil mark, the hydraulic oil should be replenished to the upper limit of the cursor.

4,

Depending on the use of the equipment and the life of the oil, the viscosity of the hydraulic oil will change after a period of use. Therefore, the hydraulic oil and filter element should be replaced after 2000 hours of use per year or cumulatively. Before the replacement, the oil should be drained first, and the oil outlet at the bottom of the tank should be opened. When the oil is discharged, the kerosene is cleaned after the oil is drained, and then the oil drain is tightened.

5,

Always re-energize through the air filter, if the hydraulic oil is not clean, it will damage the hydraulic system.

6,

Regularly replace the seal assembly of the entire hydraulic system. It is recommended that the seal of the moving part be replaced for three years, and the seal of the joint part should be replaced one year.

7,

Check if the setting of the temperature relay is correct. After the factory setting oil temperature reaches 40 degrees, the radiator will automatically open.

Sixth, control system maintenance

1,

Regularly check whether the connection line of the DCS controller is in good contact. If it is loose, it should be tightened in time.

2,

Turn off the DCS controller and computer if there is a long period of time after the test.

3,

Confirm that the control system and all indicators, buttons, operation boxes and fixtures work properly before the test.

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