Common failures of hydraulic universal testing machine

by:Sinowon     2021-07-11
Common failures of hydraulic universal testing machine

Hydraulic universal testing machine A hydraulic material testing machine that can perform various tests such as tension, compression, and bending. Hydraulic universal testing machine is used for tensile, compression, bending and shear tests of various metal and non-metal materials, as well as special tests of some products. Next, the technician will explain to you three common failures of hydraulic universal testing machine:

Common failure 1: After the sample is broken, the pendulum quickly falls back, causing an impact.

In fact, the main reason for this kind of failure is buffer failure. In addition to regular adjustments, consideration should be given to whether the oil is too thin or too dirty. All in all, it is necessary to always pay attention to the operating conditions of the hydraulic universal testing machine. For the host, pay attention to prevent eccentricity and avoid friction; for the force measurement part, prevent impact and dust from entering. Regularly check and calibrate the hydraulic universal testing machine to ensure the normal use of the hydraulic universal testing machine.

Common fault 2: The hammer return is abnormal, sometimes fast and sometimes slow.

Under normal circumstances, it is OK to rotate the buffer to the proper position. However, if the oil hole of the buffer is blocked, or there is something in the contact part between the steel ball of the buffer valve and the inlet, or the gap is too large, the buffer will fail. The solution is to clean the buffer valve and adjust the gap between the steel ball and the valve seat at about 0.5mm. Place the oil needle knob to reduce the gap between the oil needle and the valve body, and relist the A.B.C mound mark. Also, when the temperature influence is great, the oil can be changed appropriately.

Common fault 3: When loading, the oil system leaks severely or the oil pipe ruptures.

First, check whether the joints of the oil circuit system are tightened. If the gasket needs to be replaced, replace it in time. If the tubing is broken, you need to replace the tubing with a higher strength. In addition, you should also observe whether the fuel delivery valve and the relief valve piston are top dead or reversed.

The hydraulic universal testing machine is a high-tech testing equipment. Any problems in the test must be solved immediately. It must not be careless. If a failure occurs, a specific solution is needed. It is important to understand what the failure is most important and not to be vague.

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