Impact testing machine use specifications and common troubleshooting

Impact testing machine use specifications and common troubleshooting
　　 Impact refers to the instantaneous load of a structural system, and it can also be seen as a short-term process of energy transfer from the outside to a structural system. Impact testing machines are divided into manual pendulum impact testing machines, semi-automatic impact testing machines, non-metallic impact testing machines, etc. It is a new type of impact testing machine that can instantaneously measure and record the characteristic curve of the material in the impact process. By replacing the pendulum and the sample base, two types of tests of simply supported beam and cantilever beam can be realized. It detects the angular displacement signal and sends it to the computer for data processing with high accuracy. If the impact testing machine is used for too long, some common faults will occur. Today, I will explain the common faults encountered by the impact testing machine and the solutions. 1. Common faults encountered by the impact testing machine 1. The sensitivity of the dial pointer changes Poor, the position of the pendulum is abnormal, and the pendulum rod of the impact testing machine is not aligned with the vertical mark.　　 2. The hammer return of the impact testing machine is abnormal, sometimes fast and sometimes slow. The passive needle cannot stop at any position well, and it does not overlap with the main needle.　　3. When loading, the oil system leaks severely or the oil pipe ruptures.　　 4. After the sample is broken, the pendulum quickly falls back, causing an impact.　　 2. Under normal circumstances, the solution to the failure of the impact testing machine is as follows: 　　 1. The jaws are not positioned correctly when clamping, and the sample should be clamped symmetrically with the jaws as required.　　 2. The quality of the jaws is poor and the teeth are damaged, which not only affects the misalignment of the jaws, but also makes the sample slip during the test, making the yield point difficult to identify. The jaws should be replaced at this time.　　3. The lifting guide wheel is not adjusted correctly, so that the upper and lower jaws are not concentric. A test rod should be processed. After the upper and lower jaws are tightened, measure with a dial indicator based on the two force columns until the adjustment is qualified. Replace oil with suitable viscosity. Check whether the joints of the oil circuit system are tightened. If the gasket needs to be replaced, replace it in time. If the oil pipe is ruptured, 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. Common failure: After the sample is broken, the pendulum quickly falls back, causing an impact. The above are common faults and solutions encountered by the impact testing machine for everyone to share. I hope it can be helpful to everyone. In short, always pay attention to the problems found during the use of the testing machine and eliminate them in time to avoid errors in your test results . This is to check and calibrate the testing machine regularly to ensure the normal use of the testing machine.


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