Principle of use of centering lever dial indicator

Principle of use of centering lever dial indicator

I. Introduction
The centering lever dial indicator is used to measure the length, diameter, thickness and other dimensions of objects.
Precision measuring tools. It adopts the lever principle and mechanical transmission principle, and measures the lever
Micro deformation of the rod ruler to achieve accurate measurement.

2. Leverage principle
   The lever principle is a basic principle in physics, which describes the balance relationship of torque. In the centering lever dial indicator, the lever principle is applied in the process of measuring the size of objects.
3. The structure of the centered lever dial indicator
   The centering lever dial indicator consists of a lever ruler, a dial, a measuring arm, a fixed arm and other parts. A lever ruler is a slender metal rod with scales engraved on it. A dial is a disk-shaped device that can be used to read measurements. Measuring arm and fixed arm are connected with lever rod
   Two arms connected to the ruler are used to clamp the object being measured.
4. Steps for using the centering lever dial indicator
5. Place the object to be measured between the measuring arm and the fixed arm to clamp it.
6. By rotating the dial, the lever ruler comes into contact with the object to be measured and causes slight deformation.
7. Read the value indicated by the pointer on the dial, which is the size of the object being measured.
8. Principle of centering lever dial indicator
   When the object to be measured is clamped, the lever ruler will undergo slight deformation. According to the leverage principle,
   The moments acting on both ends of the lever are balanced, that is:

F1 * L1 = F2 * L2

Among them, F1 is the force on the measuring arm, L1 is the distance between the measuring arm and the center of the lever; F2 is the force on the fixed arm, and L2 is the distance between the fixed arm and the center of the lever.

Since the length of the lever ruler is very long, the sizes of F1 and F2 can be ignored, that is
F1 ≈ F2. Therefore:
L1≈L2
This means that the moments experienced by the measuring arm and the fixed arm are basically equal, that is, the deformation produced by the measuring arm can be approximately regarded as the deformation produced by the fixed arm. By measuring the deformation of the lever ruler, the size of the object being measured can be indirectly measured.

6. Advantages of Centered Lever Dial Indicator
7. High precision: The centering lever dial indicator can achieve high-precision measurement, accurate to dozens of
   One-tenth of a millimeter.
8. Convenient and easy to use: It is very simple to use the centering lever dial indicator to measure the size of an object, just
   Clamp the object to be measured and read the value on the dial.
9. Multifunctional: The centering lever dial indicator can measure diameter, length, thickness, etc.
   size, with a larger range of applications.
10. Application fields of centering lever dial indicator
    Centering lever dial indicators are widely used in machining, precision instrument manufacturing, and process testing.
    and other fields. It can help engineers and technicians make accurate dimensional measurements, ensuring
    Product quality and precision.
11. Summary
    The centering lever dial indicator is a precision measuring tool based on the lever principle.
    The small deformation of the lever ruler is used to measure the size of the object. It has high precision, convenient
    It has the advantages of ease of use and multi-function, and is widely used in various fields. When taking measurements,
    Proper operation is required to ensure the accuracy of measurement results. By centering lever
    Using the principle of sub-meter, we can better understand its working principle and improve the accuracy of measurement.
    accuracy and efficiency.