Outer diameter edge circle measurer

Abstract

The invention discloses an outer diameter prismatic measuring instrument which consists of a dial, a dial gauge stand, a platform, a base and a support; the lower part of the platform is provided with a V-shaped device with changeable angles consisting of two shear racks; each shear rack is provided with a angle positioning device; each shear rack is long and narrow, the cross section of which is in cutting edge shape and one end of which is provided with an installation hole; the shear racks are fixed in the screw holes at the lower part of the platform by bolts with springs, and can rotate freely; the angle positioning device consists of pin holes on the shear racks, six positioning holes and two locating pins on the platform; the six positioning holes are respectively lined on both sides of the central line of the platform and on the concentric circle from the pin hole centers to the platform screw holes; each positioning hole is 15 degrees separated; the angle of the two positioning holes closest to the central line of the platform is 60 degrees; 60 degrees , 90 degrees and 120 degrees prismatic roundness of a work piece can be measured only by adjusting the angle of the shear rack, so as to obtain the maximum prismatic error value, which has the advantages of simple and convenient operation, short measuring time and high work efficiency.

Description

technical field [0001] The invention relates to a special measuring device for outer diameter deviation, in particular to an outer diameter edge circle measuring instrument. technical background [0002] As we all know, roundness refers to the maximum radial distance between the inscribed circle or circumscribed circle of the contour surface and any point on the contour line, which can be measured by a roundness meter. In practical applications, when an even number of facets appear on the contour surface, the measured data is usually called ellipticity, and an ellipsometer is usually used to measure the roundness error of an even number of facets; when an odd number of facets appears on the contour surface , the measured data is usually called edge roundness, and the roundness error of an odd number of facets is usually measured with an edge circle meter; the measurement principle of the edge circle meter is actually a three-point measurement method, two points are used as p...

AI Technical Summary

Problems solved by technology

Therefore, it is very cumbersome to adjust the angle between the two positioning points twice to measure a product with a conventional edge-circle meter, which is very cumbersome and prone to errors, delays in work and time, or use the adjusted 60°, 90°, 120° There are three cylindrometers with the same degree, the measurement time is long, it is not economical, and the production cost is increased

Images