How to remove the buffer problem of impact tester

Impact testing machineIt is widely used in various fields, and usually some obstacles will occur in the test machine during work. The following are the solutions proposed by the frequently asked questions about the buffer of the test machine provided by Jinan Hengsi Shanda Instrument Co., Ltd., which I hope it will be helpful to everyone.

The impact should be applied in each of the three mutually perpendicular directions unless the battery has only two axes of symmetry, in which case the test is only performed in both directions. Each impact must be applied in the normal direction of the battery surface. Each impact must obtain such acceleration, that is, at the beginning3ms,The small average acceleration is75g(gfor the local gravity acceleration). The peak acceleration should be125gto175gbetween. Battery should be20±5℃(68±9°F) conducted the test. During the test, no unused parts and tools must be placed on the test bench to prevent falling and injuring people during vibration and damage to the instrument. After each test, do not let the working piston fall to the bottom of the oil cylinder, leave it out20mmThe distance is so that it can be used again next time, and it can prevent air from entering the oil circuit. When all accessories on the impact test machine (such as jaws, indentation heads, pendulums, etc.) are not in use, anti-rust oil should be applied and placed in a dry place. The oil used for the test machine varies according to the region and climate. If you find that the oil is insufficient during use, you must add enough oil according to the requirements of the instructions. If there is any oil leakage, check itWhere is the oil leakage in the test machine, whether the nuts at each part of the screw cap, especially the oil pipe joint, are tightened.

Normally, just rotate the buffer to the appropriate position. However, if the oil hole of the buffer is blocked, or the steel ball of the buffer valve has a stolen property with the inlet contact part or the gap is too large, the buffer will fail. The solution to the impact test machine is to clean the buffer valve and adjust the gap between the steel ball and the valve seat.0.5mmabout. Place the oil needle knob to reduce the gap between the oil needle and the valve body and relist itA.B.CThe sign of the weight. Also, when the temperature has a great influence, the oil can be replaced appropriately. If the jaws are not placed in a straight position when clamping, the jaws should be clamped symmetrically as required. The jaws are of poor quality and damage to the teeth. In addition to affecting the jaws, the sample is slipped during the test, making it difficult to identify the yield point. The jaws should be replaced at this time.

The lifting guide wheel of the impact tester is not adjusted properly, causing the upper and lower jaws to be different from the center. A test rod should be processed, and after the upper and lower jaws are tightened, use a dial gauge to measure with two force columns until the adjustment is qualified. The battery is fastened to the test equipment with rigid mounting parts that can support all mounting surfaces of the battery, each battery should withstand a total of three equal-order impacts. Check whether the blade on the swing rod is on the support, whether the top of the force-testing piston is pressed into the steel bowl, and whether the small belt on the force-testing piston is normal. Check whether the lower jaw lift limit switch and the load overload protection switch on the force measuring rod are effective. The test machine shall be regularly checked by a technical agency authorized by a statutory agency every year and must not be used expired.

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