aerometerIt is used in combination with various pneumatic measuring heads or pneumatic measuring devices to accurately measure the size or shape and position parameters of the measured parts by comparative measuring method. Yileride is a precision parts size pneumatic measurement equipment service manufacturer, independent research and development of gas coulometer, pneumatic measuring instrument and other equipment.
The pneumatic measurement method is based on compressed air as a medium, using the characteristics of the flow or pressure of air in the pipeline with the geometric size and shape of the pipeline to convert the size or displacement into the change of flow or pressure, so as to achieve measurement.
Pneumatic measuring instrument according to the working principle is divided into flow type, pressure type, flow rate type. Among them, the pressure type gas momentum meter is often used for active measurement because it is easy to send signals; Flow type and flow rate type are suitable for static measurement and are mostly used for inter-process detection.
Characteristics of pneumatic measuring instrument
The pneumatic measuring instrument is a kind of measuring instrument which can be assembled by multiple sets. It can be matched with different pneumatic probes to measure various parameters. Because of its own many advantages, the air momentum meter has been widely used in the machinery manufacturing industry. Its advantages are as follows:
1There are many measurement items, such as length, shape and position errors, etc., especially for some measurements that are difficult to be solved with mechanical measuring tools and measuring instruments, such as: the inner diameter of the sounding hole, the inner diameter of the small hole, the width of the narrow slot, etc., it is easier to achieve with pneumatic measurement.
2The magnification of the measuring instrument is high, and the human error is small, which will not affect the measurement accuracy; There is no mechanical friction during operation, so there is no return error.
3The operation method is simple, the reading is easy, the continuous measurement can be carried out, and it is easy to see whether the sizes are qualified.
4The measuring head is not in direct contact with the measured surface, reducing the impact of the measuring force on the measurement results, while avoiding scratching the surface of the measured part, especially for the measurement of thin-walled parts and soft metal parts.
5Due to non-contact measurement, the measuring head can reduce wear and extend the service life. A hose connection is adopted between the main body of the gas gauge and the measuring head to realize remote measurement.
6Simple structure, reliable work, adjustment, use and maintenance are very convenient.
Measurement of pneumatic measuring instrument
The pneumatic measuring instrument is equipped with various measuring heads and measuring devices, which can realize the following measuring items: inner diameter, outer diameter, slot width, hole distance, depth, thickness, roundness, taper, coaxiality, straightness, flatness, parallelism, verticality, ventilation and sealing.
Pneumatic measuring instrument selection
ATolerances of measured dimensions≥0.006≤0.012, use10000Multiplier meter
BTolerances of measured dimensions＞0.012≤0.025, use5000Multiplier meter
CTolerances of measured dimensions＞0.025≤0.075, use2000Multiplier meter
DTolerances of measured dimensions＞0.075≤0.154, use1000Multiplier meter
Application of pneumatic measuring instrument
1, inner diameter and outer diameter:
The air gauge is often used to measure the size or shape of the inside diameter of the hole and the outside diameter of the circle of the workpiece. Two-nozzle pneumatic probe - Having two opposite nozzle holes, it is often used to measure the inner diameter of the hole, and the two-nozzle pneumatic plug rule is mainly used to measure the outer diameter.
2Straightness:
Another commonly used place is to dynamically measure the straightness or curvature of the hole, in such a measurement, a special pneumatic probe can easily and quickly measure the straightness of the hole to be measured.
3, flatness:
Flatness is measured by moving the workpiece flat against a fixed surface with an air nozzle. This measure of flatness is fast, convenient, simple and accurate.
4Average value:
A measuring tool with multiple nozzles evenly distributed on a circular surface can measure the average value for the user. This measuring tool is mainly used for thin-walled components or special round surface components. Four, six or more nozzles can be used, the number of nozzles will depend on the size of the measuring tool.
5, perpendicularity:
The verticality of a workpiece, such as measuring the verticality of a hole with respect to a surface, can be determined by moving a hole with"ZThe pneumatic probe of the shaped nozzle measures the change in verticality according to the change in back pressure.
6, slot width:
The chip probe can easily measure the size of the groove, and the air momentum meter can not only measure the width of the groove, but also measure the parallelism of the two sides of the measured groove.
7Special round surface:
The air gauge can measure the roundness of the workpiece. For the case that the two points are not round, a commonly used two-nozzle pneumatic probe is OK, if it is an odd circle, the number of nozzles must be increased according to the number of odd circles.
8, taper:
The change in taper can be easily measured by the air momentum meter using two special probes with different nozzle surface diameters.
9, fit tolerance:
For two parts with tolerance fit requirements, the amplifier can display the hole size value, the shaft size value, and the gap value between the two components, and the operator only needs to read the gap value to determine whether the two components have the required fit size.
Billion lerideContinue to deepen the field of precision parts size pneumatic measurement, independent research and development of gas coulometer, pneumatic measurement core components, product accuracy through the Shanghai Institute of Metrology, Jiangsu Institute of Metrology and other third party testing certification. Pneumatic probe selected German steel, to ensure the probe wear resistance and long life. Accumulated service thousands of enterprises, the quality is trustworthy and choice.