SU684285A1 - Gauge for chdcking tail ends of turbinr vanes - Google Patents

Description

(54) METHOD OF MEASURING CONES

one

The invention relates to a measurement technique and can be used in the qualification and measurement of conical gauges, tapered bearings, etc.

There is a method of measuring cones by measuring the distance along the axis between two balls of different diameters that are installed in the conical holes 1.

The disadvantage of this method is that it does not allow to measure the diameter of a cone at a certain oasis distance.

A known method of measuring cones, which consists in measuring the diameters of the cones in two transverse sections at a certain distance along the axis between them and at an arbitrary distance from one end 2.

The disadvantage of this method is that it allows to measure the taper and diameters of only the outer surfaces.

The aim of the invention is to improve the accuracy of the measurement of the taper and the determination, simultaneously with the taper of the diameters in the end sections of the cones.

This goal is achieved by additionally measuring the height of the cone, measuring the diameters in two sections between them and from the opposite end.

FIG. Figure 1 shows the first measurement position when basing on one end of the cone; in fig. 2 second measurement position when based on the other end.

Measurements can be made, for example, with a microscope and a length gauge.

The height is measured at long

5 h cone. Then, the part is mounted on the table of the microscope with support on one end, and the diameters D are measured, for example, using a contact head (and Dg in sections at a certain distance a between themselves and at an arbitrary distance P from the support end (Fig. 1). To maintain the distances E and a, for example, two blocks are used, end blocks of 5 measures of length, one of which has an arbitrary size, and the other one less than its size A. These blocks are alternately mounted on the table

0 of the measuring head, additionally attached to the carriage of the vertical movement of the eye of the microscope.

Then, the cone is inverted, mounted on the second end, and the diameters of two other sections Dg and D (Fig. 2) are measured in a similar way at a distance a between themselves and at the same distance S from the second reference end of the cone. According to the obtained measurement results, it determines the taper and diameter of the cone in any section. For example, the amount of tapering K and the dimensions of the diameters of the Dmox tTiin of the end sections are determined by the expressions:

k (P - P2) + (Re - D4). 2a

П - h (РЭ) - (Р2 + D4).

max- a 4

(R + P-e) - (Ra + P) 4

n - (DI + D 3) + (Dg +04)

  h. (D + Pz) - (D2 - D4-) a4

ff t

N | wV

g 2

Claims (2)

Invention Formula The method of measuring cones, which consists in measuring the diameters of the cones in two cross sections at a certain distance along the axis between them and pa an arbitrary distance from one of the ends, characterized in that, in order to improve the accuracy of measuring taper and simultaneously by tapering the determination of diameters in the end sections of the cones, the height of the cone is additionally measured, the diameters are measured in two sections at the same distances between them and the opposite end. Sources of information taken into account in the examination  Grigoriev, I.A., Dvoretsky, E.R. Dimensional control in mechanical engineering. 1959, p. 187, 198. 2. Patent of France No. 166060, cl. G 01 B, 1974.