SU1325287A1 - Apparatus for checking dimensions of prismatic parts - Google Patents

Abstract

Of () b), the theory refers to a linear measurement technique. The aim of the invention is to increase performance and expand the field of application of the device. The device contains a base 1 with a desk 4 4 11 autocollimation tube 6 with a mirror and three measuring rods 11, 12 and 13. The second and third measuring rods are made shorter compared to the nerve. When controlling the height of the high-sensitized parts, the latter are mounted on an object table 4 and brought into contact with the measuring rod 11. The other two rods are held by the stoppers and the object to be monitored is not covered. To control the non-parallelism of the ends of the table, the devices are forcibly tilted with the help of mechanism 17 and interact with the part under test by the second and third measuring rods. According to the longitudinal inclination of the mirror, the longitudinal non-linearity of the end faces is judged, but to the contrary - the transverse one. To read the two angles of inclination, the 1-scale of the device was installed in the form of a two-coordinate grid, and the readout index in the form of a cross. 3 il. "(L 5 J oo IND SP JU 00

Description

This invention relates to a linear measurement technique, namely, to means of controlling prismatic parts.

The purpose of the invention is to increase productivity and expand the field of application of the device.

FIG. 1 shows the device, a general view; in fig. 2 — node I in FIG. one; in fig. 3 is a section A-A in FIG. 2

The device contains a base 1 with a stand 2, a bracket 3 and a subject table 4. A second bracket 5 is also mounted on the rack, non-coil is an autocollimation tube 6. At the bottom of the tube you can place it, but a mirror 7 mounted on three spherical supports 8, 9 and 10 (Fig. 2). Each of the spherical supports is placed on the special slide 11 (12 and 13). All rods are equipped with travel stops 14, 15, and 16. The rods are placed at the vertices of an isosceles triangle (Fig. 3).

The rods 12 and 13 are shortened compared with the rod 11 by an amount A exceeding the tolerance on non-parallelism of the ends of the objects to be monitored. The subject table is equipped with a forced tilt mechanism 17 around the axis 18. For an unambiguous base of the controlled object on the table, a stop 19 is fixed.

The device works as follows.

The object table 4 is placed in a horizontal position and, acting on the measuring rod 11, the height of the object being monitored is measured. In this case, the measuring rods 12 and 13 are held by constraints 15 and 16 and do not touch the object to be monitored. The plane mirror 7 is rocked in the same plane around the straight line passing through the spherical supports 9 and 10, and the device operates as a conventional optimeter. If it is necessary to additionally check the parallelism of the ends of the object, then using the forced tilt mechanism 17, the subject table 4 is rotated by a predetermined angle f greater than yrOvi, determined from the relation

 arctg (u / h)

where D is the magnitude of the shortening of the measuring rods 12 and 13; h the height of the triangle formed by the measuring rods. After tilting the subject table to interact with a controlled object

five

0

five

0

five

0

five

The volume comes in all three measuring rods, which changes the rotation of the flat mirror 7. The scale of the device, made in the form of a two-coordinate grid, makes it possible to count the longitudinal and transverse inclinations of the mirror. The transverse non-parallel H of the object can be calculated by the formula

H VlVh, where V is a display on a transverse scale

devices;

I is the height of the triangle formed by the measuring rods; L is the length at which it is normalized.

non-parallelism

Longitudinal non-parallel B can be calculated by the formula

U + h (X + S) I / h, where 1 / is the longitudinal reading

devices;

oC is a device constant determined from the expression SL for arctg (u / h); ; ® forced tilt angle

table;

h is the height of the triangle formed by the measuring rods. To measure the height and non-parallelism of prismatic parts with the aid of the proposed device, there is no need to perform a reinstallation, but it is enough to perform one inclination of the sample table, which improves the measurement performance. The simplicity of the calculation formulas makes it possible in the shortest possible time to calculate the desired parameters.

Claims (1)

Invention Formula A device for controlling the dimensions of prismatic parts, comprising a base with an object table, an autocollimation tube with a scale, a reading index and a mirror mounted on three supports, and a measuring rod carrying the first support of the mirror, characterized in that, in order to increase the performance of control and expand the nomenclature controlled parts, the scale is made in the form of a two-coordinate grid, the reference index is in the form of a cross, and the device is equipped with two I additional axial-sliding rods, the length of which is T he longer the length of the measuring rod, and forced the tilt mechanism of the object stage, a second and a third mirror support that serves extra stocks. / 4-L 73 2 Fig.Z