Analysis: The relationship between the surfaces of automated instrumentation parts

In modern industrial production, the surface of many parts is processed to have specific technical performance characteristics, such as: the wear resistance, sealing, matching properties, heat transfer, conductivity, and reflection of light and sound waves on the surface of the parts. The fluidity and corrosivity of liquids and gases on the wall, the surface properties of films, integrated circuit components and artificial organs, the accuracy, reliability, vibration and noise of measuring instruments and machine tools, and the evaluation of these technical performances are often Depends on the condition of the surface characteristics of the workpiece, which is closely related to the geometric structure characteristics of the surface.

Therefore, the core problem of controlling the quality of the processed surface lies in its use function, and the surface characteristic parameters that can meet the requirements of the use should be specified according to the characteristics of various parts. It is not difficult to see that for a particular processed surface, we always hope to use the most (or relatively) appropriate surface feature parameters to evaluate it, in order to achieve the expected functional requirements; at the same time, we hope that the parameters themselves should be stable and reflect the essential characteristics of the surface. It is not affected by the evaluation criteria and the resolution of the instrument, and reduces the error of parameter indication caused by the measurement of random processes.

Portable Roughness Tester But from the characteristics and content of the standard formulation, we can easily find that with the development of modern industry, especially the emergence of new surface processing methods and the application of new measuring instruments and measuring methods, many of the standards are The parameters can no longer meet the needs of modern production, especially in some special processing occasions, such as finishing, the surface of the same (or very similar) Ra value of the portable roughness meter processed by different methods may not necessarily have the same use. Function, it can be seen that the Ra value is powerless to evaluate this kind of surface at this time, and the traditional evaluation method pays too much attention to averaging the height information, and almost ignores the attributes in the horizontal direction, and fails to reflect the comprehensive information of the surface topography.

In the field of surface characteristics research in recent years, relatively speaking, the research on the surface functional characteristics of parts itself is relatively weak, because it involves many disciplines and technical fields. Various parts of the machine have different requirements in use, and the research on the functional adaptability of surface features will be very complicated, which also limits the research on the relationship between surface topography and its functional characteristics.

The rapid development of industrial production urgently requires the emergence of more effective and more adaptable surface feature evaluation parameters. In order to solve this contradiction, many scholars in various countries have increased their research efforts in this area in order to be in the near future. In the future, a set of parameters with significant functional characteristics will be worked out.

On the other hand, in order to prevent the explosion of parameters and the appearance of a large number of related parameters, it is necessary to use one parameter to evaluate multiple performance characteristics, and use a small set of parameters to achieve the accuracy of the essential characteristics of the surface description.