Various methods of checking surface roughness

Check the surface roughness, just like a rigorous quality inspector, carefully inspect the appearance of the workpiece to judge whether its surface roughness meets the standard.

The measuring principles of this kind of instruments are varied, just like doctors’ diagnosis, such as touching needles, light cutting, interference and so on, and each method has its own unique diagnostic method.


Among them, the touch needle method is like a careful craftsman, sliding on the surface of the workpiece with a delicate needle, and depicting the true face of surface roughness by sensing the height difference between peaks and valleys.

The optical tangent method is like a magician who is good at optical magic. With the help of optical principle, it induces the light reflected from the surface of the workpiece to interfere, and accurately calculates the surface roughness by calculating the number of interference fringes.

The roughness instrument not only acts as a quality inspector, but also provides a “full-body photo” of the workpiece surface, so that we can see all the features of the workpiece surface clearly.

It is like an all-round information provider, which involves almost all fields in the manufacturing process, whether it is mechanical manufacturing, aerospace or automobile manufacturing, or even medical field, and it is active.

With its help, we can accurately measure and control the surface of the workpiece to ensure that each workpiece can achieve the preset quality and performance.

In addition, it often provides us with many other valuable information, such as the smoothness of the workpiece, whether there are defects on the surface, machining marks and so on.

This information is like a mirror, reflecting the problems existing in the manufacturing process, so that we can find out and solve these problems in time, further optimize the manufacturing process and improve efficiency.

Generally speaking, roughness instrument plays an important role in the manufacturing field, which provides so much valuable information that we can better understand and control the manufacturing process. Therefore, we should pay attention to the application and development of roughness instruments to improve the quality and efficiency of manufacturing engineering.

Roughness will lead to the change of actual size. The same basic size and different roughness will lead to different maximum physical size.

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