SU1657932A1 - Device for measurement of linear translation - Google Patents

Abstract

The invention relates to a measuring and measuring technique and can be used to measure linear dimensions. The purpose of the invention is to improve the measurement accuracy. The goal is achieved by supplying the device with a coaxially mounted 1 guide with a sleeve 5 that is stepped along the length, made with a radial groove 8 and an L-shaped bracket 7, one shoulder of which is rigidly fixed on the step of the sleeve 5. The axis of this shoulder is parallel to the axis of the guide 1, the other shoulder Brackets 7 are placed in the radial groove 8 of the sleeve 5 and are designed to interact with the spring 10 and the meter 11 linear displacements. Sponge 3 is placed on guide 1, and sponge 4 is fixed on sleeve 5. 2 Il. And h fe O el vj ChE SO oo Fig I

Description

The invention relates to measuring and control technology, in particular, devices for measuring linear dimensions, and can be used, for example, in power engineering to measure external and internal diameters, as well as to measure the average diameter of cylindrical threads of products used for equipment of nuclear power plants.

The aim of the invention is to improve the measurement accuracy by eliminating errors.

FIG. 1 shows a device for measuring internal linear dimensions; a general view, in FIG. 2 is the same for measuring external dimensions.

The device contains a guide 1, on which the measuring jaw 3 and 4 are movably mounted along the longitudinal groove 2 and the cylindrical rod 5. The position of the measuring jaw 3 is fixed by a screw 6. The measuring sponge 4 is fixedly mounted on the sleeve 5. The device is equipped with an L-shaped bracket 7 , one shoulder of which is fixed at the step of the sleeve 5 parallel to its axis, the second shoulder is placed in the radial groove 8. In the hole 9 there is a spring 10 and a meter 11 linear displacements. Bracket 7 has an emphasis 12.

The device works as follows.

In the initial state, when measuring the internal dimensions (Fig. 1), the clamp 7 under the action of the spring 10 occupies the lowest position relative to the groove 8. To carry out the measurement, the measuring sponge 3 is moved along the groove 2 of the guide 1 to the measuring sponge 4, while the distance between they will be larger than the nominal size by 1-2 mm, and fixed with a screw 5. Then the device is adjusted to the nominal size of the monitored parameter A, for example, by gauges of length, and the meter 11 linear displacements is set to the zero position. Using the stop 12, the bracket 7 is moved to the uppermost position relative to the groove 8. The bracket 7 moves the sleeve 5 together with the sponge 4, and the distance between the jaws 3 and 4 is smaller than size A. The sponges are inserted into the test piece 13 and release the stop 12. Under the pressure of the spring 10, the clamp 7 tends to occupy the initial position and moves the sleeve 5 together with the sponge 4. The jaws tightly press against the walls of the part 13. If

if the actual size A differs from the nominal size, then the arrow of the linear displacement meter 11 deviates from zero in one direction or the other and shows the deviation from the nominal size A.

When measuring the outer dimensions (Fig. 2), the device is rearranged. For this, the spring 10 is positioned between the bracket 7 and the gauge 11 of the linear displacements. In the initial state, the clamp 7 under the action of the spring 10 occupies the uppermost position relative to the opening 8. The measuring sponge 3 is installed and fixed with the screw b on the guide 1 with respect to the measuring sponge 4 as follows. so that the distance between them is 1-2 mm less than the nominal size. The device is adjusted to the nominal size of the monitored parameter B also along the end gauges, and the meter 11 linear displacements is set to the zero position. Using stop 12 bracket 7

transferred to the lowest position relative to the hole 8. This moves the sleeve 5 with the measuring sponge 4 and the distance between the jaws 3 and 4 is larger than size B. The emphasis 12 is released, the sponge 4 under

the pressure. springs 10 tend to the initial position and the jaws 3 and 4 tightly press against the part 13. By the deflection of the arrow, the meter 11 linear displacements in one direction or the other is determined on a scale

the amount of deviation from the nominal size B.

To measure the average thread diameter of the part 13, the device is completed with tips, which are mounted

on measuring jaws 3 and 4. The process of measuring internal and external cylindrical threads is similar.

Claims (1)

An invention of a device for measuring linear displacements, comprising a guide with a longitudinal groove, a spring accommodated therein, two measuring jaws, the first of which is rigidly fixed on the guide, and the second is mounted for movement along the groove, and a linear displacement meter differing in that that, in order to increase the measurement accuracy, it is equipped with a coaxially mounted guide that can be axially moved with a sleeve that is stepped along the length and has a radial groove in the pain its diameter, and the L-shaped bracket, one shoulder of which is rigidly fixed on the sleeve step, the axis of this shoulder is parallel to the axis of the guide, the other shoulder of the bracket is placed in the radial slot of the sleeve and is designed to interact with the spring and the linear displacement meter, and the second sponge is fixed on bushing.