SU439684A1 - Device for measuring the size of m fine-grained gears - Google Patents

Description

one

The invention relates to control devices in measurement technology, in particular to devices for measuring the size M of fine-grained gears by measuring wires.

There are known devices for measuring the size M of fine-grained gears by measuring wires, containing a micrometer node with a measuring leg for mounting the device on the calculated size M, an indicator node with a leg for measuring the deviation of the test item from the size M, a measuring table assembly with a hole in the center of the table and a base, on which the specified nodes are placed.

The known devices do not allow to measure the fine-modular wheels with the required accuracy, since it is necessary to rearrange and adjust the replaceable parts of the device when measuring.

In order to improve measurement accuracy and labor productivity, at measuring fine-grained gears, the proposed fixture is equipped with clip-less clips with backlash-free ballpieces mounted on the legs of the indicator and micrometric nodes, and a tapered needle installed into the hole of the measuring table for orientation of the measured gear by

the center of the table, and the supporting surface of the measuring table is made in the form of cross-shaped slats, two adjacent ones of which form an angle at the apex of about 90 °.

FIG. 1 shows the proposed adaptation, top view; in fig. 2 is the same section along G-D in FIG. one.

The device consists of three nodes A, B and C: micrometric, indicator and measuring table, respectively.

Micrometer node A contains a micrometer 1, the design of which is similar to the standard measuring leg 2, the holder 3 mounted on the leg with measuring wire 4, corresponding to its module.

The indicator assembly B contains an indicator 5, a measuring foot 6 of the indicator, a holder 7 with a measuring wire 8 corresponding to the module, mounted on the measuring foot 6 of the indicator.

The node B of the measuring table contains a supporting surface of the table 9, on which the measured gear is stirred, and made in the form of cross-shaped planks, two adjacent of which form an angle with a wedge of about 90 °, a conical needle 10 installed in the hole of the supporting surface of the table. The taper needle allows the measured gear to be oriented.

in the center of the table 9, fixed by its base into one of the nest holes of the carriage 11, moving without clearance along the guide rails 12. All nodes A, B and C are placed on the base of the fixture.

The device works as follows.

On the table 9 set controlled gear. In this case, the measuring leg of the indicator is retracted to the extreme position. Then, the measuring leg of the indicator is brought into contact with the surface of the profile of the measured gear. In this case, the measured wires will occupy an appropriate position between the gear teeth. According to the indicator deviation within the tolerance limit, the suitability of the gear wheel is determined. The device allows to measure the size of the MI between the wires. The micrometer is set to zero using a gauge. Therefore, the table for measurement should be added for each measured part (fine-modular gear) additional times DK and L of the nest opening of the chamber of Mark 11.

Mr g Ml - D,.; flf; hence M, MpZ Mr M-2rf-D,

where d is the diameter of the wire; M - the size of the wires; M | - the size between the wires;

Mr - settlement-installation indication of the micrometer;

to

caliber diameters equal to 25, 50, 75 mm, based on the reference maximum micrometer size

25 mm.

Subject invention

A device for measuring the size M of fine-grained gears through wires, containing a micrometer assembly with a measuring leg for mounting the adaptation on the calculated dimension M, an indicator assembly with

measuring leg to measure the deviation of the product under test from the size M, the measuring table assembly with a hole in the center of the table and the base on which these nodes are placed, characterized in that, in order to improve the accuracy and performance of the measurement, it is equipped with indicator and micrometric feet mounted nodes clips with backlash-free ball course, in each of

which the measuring wire is placed, and a tapered needle installed in the opening of the measuring table for orientation of the measured gear in the center of the table, and the reference surface of the measuring table is made in the form of cross-shaped strips, two adjacent of which form an angle at the top of about 90 °. Q FIG. 2