Chunheng Tools introduces the use of imported pneumatic instruments for you

OJIYAS Pneumatic Measurement in JapanThe principle is based on a physical law: the flow rate and pressure of a gas are directly proportional to the size of the gap it passes through, while the flow rate and pressure are inversely proportional, that is, when the gap increases, the gas flow rate also increases proportionally, while the gas pressure decreases proportionally; When the gap decreases, the flow rate and pressure of the gas also decrease and increase proportionally.

The above principle can be achieved by passing the set airflow through a certain type of throttling port (such as a needle valve or a gemstone hole), and then spraying it out through the nozzle of the pneumatic meter. When the obstacle (measured workpiece) approaches the nozzle, the gas flow rate decreases and the back pressure increases. When the nozzle is blocked, the gas flow rate is zero, and the back pressure is equal to the set gas pressure. On the contrary, when the nozzle is exposed to the atmosphere and there are no obstacles in front, the gas flow rate reaches its value, while the back pressure is at its minimum.

There are several different types of OJIYAS pneumatic measurement systems in Japan:

(1) Back pressure exhaust system

This system has a wide range of applications. Measurement devices of different pneumatic measurement systems may use this system. The system uses a gas pressure regulator to control the input gas pressure to ensure linearity. The pressure regulator is the second throttling port, and users can adjust the input gas pressure (to match the measuring device used) to achieve the purpose of regulating different pneumatic measuring devices. This system uses two calibration standards to calibrate the instrument.

(2) Differential system

This system divides the airflow into two paths, each passing through two fixed throttling ports. The endpoint of one of the branches is the zero position valve, which serves to balance the pressure with the other branch of the system (whose endpoint is the pneumatic ring gauge or pneumatic plug gauge). The pressure difference between these two branches is measured by a differential pressure gauge bridged between the two branches. This type of system uses a single standard component to set the zero position, and its measuring device needs to be specially ordered for each specific magnification. Due to the use of a single calibration point, this system has strict requirements for the wear or damage of the measuring device, and any parts with significant manufacturing errors may cause inaccurate readings.

(3) Traffic system

This system measures and reads using a tube flowmeter with float indication, and calibrates using two standard components. The measurement accuracy of this system within the entire tolerance range is similar to that of a back pressure exhaust system, but it adjusts the magnification range by replacing the flow tube and scale, which is more complex than the adjustment method of a back pressure system. The flow system requires the use of nozzles with larger apertures, which also require much higher gas flow rates. Due to the larger size of the nozzle, it must be closer to the measured workpiece, resulting in a lower pressure drop of the nozzle, which may shorten the service life of the measuring device. The flow system can use a long gas hose without affecting the response time of the amplifier, which makes it very suitable for measuring long holes (such as gun barrels).

OJIYAS pneumatic measurement in Japan is a fast, efficient, and reliable measurement method suitable for detecting workpieces with dimensional tolerances below 0.13mm. Its resolution and repeatability can reach several millionths of an inch. Due to the non-contact nature of pneumatic measurement, it is very suitable for detecting soft surfaces, polished surfaces, thin-walled parts, and other materials that are easily scratched by the measuring head.

OJIYAS pneumatic measurement in Japan can quickly and efficiently measure complex geometric tolerances such as diameter, taper, parallelism, perpendicularity, flatness, and fitting quality of components. Detecting these errors using other methods may be difficult to achieve, or may be costly and time-consuming. The size of the pneumatic probe is constantly shrinking (currently its diameter can be as small as 0.6mm).

Many pneumatic measuring devices and/or measuring computers today can become a component of manufacturing units that can communicate with robot feeding devices and have the ability to send cutting offsets to machine tools. By integrating measurement functions, these manufacturing units can achieve 24-hour uninterrupted processing with 100% full inspection of workpieces.

With the continuous development of computer technology, aerodynamic measurement technology is also constantly advancing. From simple desktop reading devices to statistical process control (SPC) measurement systems with contour scanning capabilities, the specifications and varieties of pneumatic measuring instruments are becoming increasingly diverse. As the processing requirements of products become increasingly complex, pneumatic measurement technology is constantly improving to better meet these needs.