| 摘要 |
PURPOSE:To obtain the measurement result of easy, high-precision quality inspection by supplying fluid of the same pressure to a molding to be inspected and a master in the same shape, and comparing and measuring the pressure and deciding whether the molding is normal or not, and discharging the fluid to the outside every time a measurement is taken. CONSTITUTION:Compressed air from an air supply source 20 is passed through a filter 22, pressure regulator 24, and pressure gauge 26 and branched in two directions through an electromagnetic change-over valve 28. The air is sent to the body 36 to be inspected and the reference master 38 in the same shape with it through electromagnetic changeover valves 30a and 30b, filters 32a and 32b, and throttle valves 34a and 34b. A difference detector 40 measures a difference in internal air pressure between conduits 31a and 31b. The differential pressure is sent to a display device 44 through an amplifier 42 and a meter 44. A defect of the object body 36 such as cracking and a pinhole is detected from the differential pressure. When the inspection is finished, the air is discharged through a valve 48 and next inspection is performed. |
