1. According to the sample, select the measurement range, hang or remove the pendulum thallium on the pendulum rod and adjust the handle of the buffer valve to align with the marking line.
2. Put the corresponding chuck into the upper and lower jaw seat according to the shape and size of the sample.
3. Roll the recording paper (graph paper) on the roller of the tracer. This item is only performed when needed.
4. Turn on the oil pump motor, unscrew the oil delivery valve to raise the test bed by 10 mm, and then close the oil valve. If the test bed is already in the raised position, you do not need to turn on the oil pump to deliver oil first, just close the oil delivery valve. .
5. Start the lower jaw motor, lift the lower jaw to an appropriate height, and clamp the other end of the test in the lower jaw, paying attention to making the sample vertical.
6. Put down the drawing pen on the push rod to enter the drawing preparation state (only when drawing is required).
7. The hydraulic oil is N46 anti-wear hydraulic oil or N46 low-condensing hydraulic oil. It is used after being filtered by 80-100 mesh screen. The first oil change time should not exceed 2 months, and every 6 months thereafter. Change the oil once.
8. Check the cleanliness of the oil after 200 hours of working time of the stretching hydraulic press. It is required to be free of odor. Put a drop of oil on the white filter paper and there is no ink within the center of the oil, otherwise the oil should be changed.
9. In case of accidental leakage of the system, sufficient hydraulic oil should be added after the failure is eliminated.
10. Check the pump station frequently, and the air in the system should be exhausted to work.
11. During the test machine, if there is any abnormality, immediately stop the machine for inspection.
12.The pressure can be reduced by 2.5MPa for ten minutes.
The above content is a detailed introduction to the precautions for the test machine of the stretch hydraulic press, and I hope it will be helpful to everyone.
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