| 摘要 |
A method and a device determine tribological measured values of samples with a rheometer. Wherein the measuring parts of the rheometer are replaced by samples and the surfaces of the samples are moved into frictional contact relative to each other. Accordingly, it is provided that all parts of the rheometer holding the samples in frictional connection and frictional contact or forming the rheometer power circuit, including the spring unit pressing the samples against each other, are regarded as an oscillatory circuit. The oscillation properties of the spring unit are regarded as relevant to the oscillation properties of the oscillatory circuit, and that the oscillation properties of the spring unit are adjusted taking into consideration the resonance oscillations or effects produced by changing, different measurement conditions expected with the respective measurement. |
| 主权项 |
1. A method for determining tribological measured values of samples with a rheometer, which comprises the steps of:
replacing measuring parts of the rheometer by the samples and the samples being disposed opposite each other, and surfaces of the samples being moved relative to each other under force effect in frictional contact; supporting at least one of the samples lying opposite each other by a spring of a spring unit and pressing the sample against the other sample in each case; presetting a speed of the samples and/or a torque applied to the samples by means of drives provided in the rheometer; determining a resulting torque and/or a resulting speed of the samples as a measured value, all parts of the rheometer holding the samples in frictional connection and frictional contact or forming a path or circle of force of the rheometer, including the spring unit, being regarded as an oscillatory circuit, oscillation properties of the spring unit regarded as relevant to and sufficiently representative of the oscillation properties of the oscillatory circuit; and performing, before a start and/or during the determining of the measured value, a setting, adjusting or tuning of the oscillation properties of the spring unit taking into consideration resonance oscillations or effects produced by changing, different measurement conditions, including the samples possessing different mass, changes of frictional resistance and/or changes of axial forces occurring, which are expected with a respective measurement. |
