The tensile testing machine is the core precision equipment for material mechanical property testing, and its long-term stability directly determines the accuracy and reliability of the test data. In long-term use, environmental factors such as temperature and humidity can easily lead to aging of core components and parameter drift, affecting test accuracy and shortening service life. This paper briefly analyzes its specific impact and gives targeted control measures based on practical operation to provide guidance for equipment operation and maintenance.
Temperature is the primary factor affecting the long-term stability of equipment, and it has a significant impact on core components such as load sensors and extensometers. Temperature fluctuations will cause the strain gauge resistance value to drift, resulting in force measurement deviations. Long-term high temperature will deform the frame and aging the connecting wires, and low temperature will lead to transmission stuttering, damage to electronic components, and frequent temperature changes will aggravate component fatigue and shorten the stable working cycle.
Humidity is a key auxiliary factor, which mainly affects the stability of equipment through erosion and moisture. High humidity will cause rust and corrosion of metal parts, transmission lag, moisture in the internal circuit of precision components, strain gauge failure, signal drift, and accelerate the peeling of the equipment coating, reducing the protective performance. In addition, dust, vibration, electromagnetic interference, etc. can also indirectly affect the stability of the equipment, leading to reduced accuracy.
In response to the above impacts, control measures can be taken from three aspects. In terms of temperature control, the equipment is placed in a 20±2°C constant temperature laboratory, equipped with a constant temperature device, away from heat and cold sources, and the heat dissipation system is regularly cleaned. In terms of humidity control, use a dehumidifier to control the humidity at 45%-65%, regularly remove rust and anti-corrosion from metal parts, and seal and protect precision parts.
At the same time, keep the laboratory clean to reduce the impact of dust, fix equipment and keep away from vibration and electromagnetic interference sources, standardize the operation process, avoid overload of equipment, and regularly calibrate and maintain and replace aging parts. In summary, scientific control of environmental factors and daily operation and maintenance can effectively ensure the long-term stable operation of the tensile testing machine, ensure rigorous and accurate test data, and extend the service life of the equipment.
