Trunnion measurement solutions

Trunnion measurement solutions - 2019 08 - 12 axial is widely applied in all kinds of machinery. Some shaft diameter need precision measurement. Let's see, there are those who measure solution? 1, the use of measuring gauge ( FIG. 1) , also calls the card board, gauge is used to measure the average accuracy of trunnion, is the most commonly used mechanical manufacturing axial batch inspection method. Gauge according to the diameter of axle end and check end of tolerance of maximum and minimum size limit. Measured with calipers trunnion, high efficiency, easy to operate. Use table micrometer or table gauge ( FIG. 2) Measure the diameter of axle is also a commonly used method, the readings dividing value can reach 1 & mu; M, often used in axle inspection in the process of finishing. 2, the instrument measuring vertical optical meter can measure the diameter of axle. But for a long axis, the need when measuring up the shaft by hand, at the end of the operation inconvenience. It is recommended to use vertical length measuring instrument ( Figure 3) Measure the diameter of axle. As shown in figure 4 for the vertical length measuring instrument is measuring shaft neck part of a long shaft, the clever use of the fixed on the base to the left of the V on the auxiliary support bearing the left end of shaft to lift. The right end bearing cap on knife-edge test next. Auxiliary support have lift coarse, fine tune function, can easily find a turning point in the reading. Measured using the auxiliary support filament diameter bar and with handle thread plug gauge, also can bring a lot of convenience. 3, laser measuring diameter instrument, laser measuring diameter instrument ( FIG. 5) Is measured a laser beam scanning, scanning beam is photoelectric detector measure way, and with computer data processing system is a new type of trunnion measuring instrument. As shown in figure 6: laser thin beam of light from the mirror and collimating lens and shoot at the many facets of the collimating lens focal plane a reflection on the surface of the mirror, the reflected light through the collimating lens refraction, into a parallel to the optical axis of the light, then through another piece of receiving the collimating lens, the light is located in the collimating lens focus on photoelectric detector receives. Two pieces of the collimating lens coaxial, measured between two collimating lens. Measurements, as a result of polyhedral mirror in rotate at a constant speed motor driven, so by the surface reflected light scanning tested periodically. When light is sample block, photodetector output low level; And when is, output high level. As long as enough thin light beam, photoelectric detector output periodic square wave signal. According to the width of the square wave get measured diameter of sample. This kind of measuring diameter instrument of the biggest advantages is the measurement of high efficiency, used in the on-line detection of precision of bar and wire diameter. 4, axial detector with the progress of technology, at the beginning of this century, the axial detector, its function extension to shaft axial size, radial size, Angle, roundness, beating, even chamfering, empty groove, all sizes can be measured. Figure 7 for an axial detector, it adopts the contact measurement, an axial measurement system and multiple sets of radial measurement system, the uncertainty of measurement: axial: ( 3 + L / 100) μ M, radial: ( 1 + D / 100) μ M is shown in figure 8 is an optical type axial detector, using non-contact measurement, CCD receiving. Measured axis can be tilted relative projection light & plusmn; 15° , can measure the thread on the shaft. （ Source: the heavens photoelectric)