Detailed analysis of three errors of hydraulic universal testing machine

Hydraulic universal testing machineIt is a commonly used experimental equipment in material testing tests. Our company has conducted a detailed analysis of the three errors of hydraulic universal machines. The display error is mainly reflected in the following ways:

1. The positive deviation of the display value exceeds the difference.

After confirming that the installation level of the instrument meets the requirements of the regulations, first check whether the friction in the working part is too large. If so, the guide wheel clearance should be adjusted to eliminate friction. If necessary, clean the working oil cylinder. If there is still a positive difference after eliminating the influence of friction, the tightening screws of the swing rod in the force measuring part (reading mechanism) and the push plate connecting the shaft sleeve should be loosened, and the push plate should be adjusted to the inside. After tightening the tightening screws, the small disc is checked step by step, and repeated several times until the calibration is passed. If the small disc is qualified and the large and medium discs are still exceeding the difference, the weight of B and C thallium should be appropriately increased until the calibration is passed.

2. The negative deviation of the indicator value exceeds the difference.

First, check whether the force-testing piston is installed correctly and whether the friction is too high. After this reason is eliminated, adjust the push plate to the outside and adjust the small dial to be qualified. If the large or medium dial is still exceeding the difference, the weight of B and C thallium should be appropriately reduced until the calibration is passed.

3. The display error shows "positive front and negative afterwards" or "negative front and positive afterwards" on the dial and some points exceed the difference.

At this time, the angle of the contact surface between the push plate and the tooth rod head should be changed. The contact surface is usually fixed to the surface of the push plate with a flat steel sheet through two upper and lower screws. The adjustment method is to loosen the two screws, and use copper or other light metal sheets to pad the upper or lower side between the steel sheet and the push plate (only pad on one side), so as to change the angle, and repeatedly check and adjust until it is qualified.

MoreTesting machineTechnical articles are all available in: Jinan Hengsi Shanda Instrument Co., Ltd.

Label:Universal testing machine,Hydraulic universal testing machine,Tension tester,ImpactTesting machine, twisting test machine, Material Testing Machine