Flatness is one of the important geometric quantities in machining, reflecting the degree of smoothness
of a part's surface. This article will introduce several commonly used methods for measuring flatness
and share some practical tips for industrial applications to help you better understand and apply these methods.
Ⅰ、Level Gauge Measurement Method
1. This is a traditional method for measuring flatness, which uses a level gauge to measure the inclination
at different positions on the surface, thereby judging the degree of flatness. This method is simple and easy to
implement, suitable for rapid on-site detection.
2. It should be noted that the accuracy of the level gauge is limited, and it is generally only suitable for rough
measurements of flatness.
3. Choosing the appropriate range and accuracy level of the level gauge is crucial for the accuracy
of the measurement results.
Ⅱ、Micrometer Gauge Measurement Method
1. Fix the micrometer gauge on a height gauge, then move the height gauge across the surface being measured,
and determine the degree of flatness by reading the indications on the micrometer gauge. This method is more
accurate than the level gauge measurement method and has a wider range of applications.
2. Before measurement, the micrometer gauge needs to be calibrated to ensure the accuracy of the measurement.
3. During the measurement process, maintain the stability of the height gauge to avoid shaking or tilting.
Ⅲ、Coordinate Measuring Machine (CMM) Measurement Method
1. The Coordinate Measuring Machine (CMM) is a high-precision measurement device capable of quickly
and accurately measuring flatness. It is suitable for situations where high precision in flatness is required.
2. Before measurement, it is necessary to establish an appropriate coordinate system and select suitable
measurement parameters.
3. The measurement results can be directly output in digital form, facilitating data processing and analysis.
There are various methods for measuring flatness, and choosing the appropriate measurement method is crucial
for ensuring the accuracy of the results. In practical applications, we need to select the suitable measurement method
based on specific circumstances and adhere to operational norms to obtain reliable measurement results.
