RU62231U1 - DEVICE FOR DETERMINING SIZES OF CALIBERS-BRACKET - Google Patents

Abstract

The utility model relates to test equipment and can be used in various sectors of the national economy to control parts, for example, brackets. A device for determining the dimensions of caliber brackets includes a base on which the guides are placed, two plane-parallel jaws, at least one of which is made with the possibility of reciprocating movement relative to the other along the guides, as well as a reading mechanism. The device may include at least one carriage on which a plane-parallel sponge is mounted. The device may comprise a ball screw pair for moving the carriage. The reading mechanism can be made in the form of a raster line, mounted on the base and a read head, mounted on the carriage. The technical result of the utility model is to increase productivity and measurement accuracy.

Description

The utility model relates to test equipment and can be used in various sectors of the national economy to control parts, for example, brackets.

It is known to determine the sizes of gauge brackets using a set of end-length measures made in the form of plane-parallel plates of various thicknesses (“Recommendation. Smooth gauges for cylindrical shafts and holes. MI 1927-88”, M., publishing house of standards, 1989, pg. 6-7). To determine the size of the bracket, you need to measure the distance between its working surfaces. To do this, plane-parallel plates are inserted between the working surfaces of the bracket until they are snug against each other and to these surfaces. The sum of the thicknesses of plane-parallel plates inserted between the working surfaces of the bracket determines the size of the bracket.

The disadvantage of this technical solution is the low accuracy of the measurement due to the loose fit of the end measures (plane-parallel plates) to each other and to the working surfaces of the bracket, as well as due to the application of different forces when entering them. Also, the repeated use of plane-parallel plates leads to their wear (when rubbing against each other) and to the deformation of the bracket, which ultimately reduces the measurement accuracy. Another disadvantage is the low measurement performance due to the increased complexity.

A device for measuring external and internal dimensions is also known - a vernier caliper, which consists of two measuring surfaces (jaws) between which a size is set, one of which (basic) is integral with a ruler (bar), and the other is connected to a frame moving along the ruler ( see "Big Soviet

Encyclopedia ”, third edition, vol. 29, M.,“ Soviet Encyclopedia ”, 1978, p. 488).

The disadvantage of this device is the low accuracy of measuring sizes of caliber brackets due to inaccurate exposure (by eye) of the caliper jaws between the points that protrude most on the working surfaces of the bracket opposite each other, as well as the inability to make the measuring surface of each caliper jaw contact the entire plane of the corresponding working surface of the bracket, since the design of the caliper does not provide for the extended execution of the measuring surfaces of its jaws. Another disadvantage is low productivity and an increase in the measurement time, since all measurements are performed manually, and the reading is taken by eye.

None of the devices currently known to the applicant allows for accurate and quick results of measuring sizes of caliber brackets.

The technical result of the utility model is to increase the productivity and accuracy of measuring the size of caliber brackets.

To obtain the claimed technical result, the proposed device for determining the sizes of gauges-brackets includes a base on which the guides are placed, two plane-parallel jaws, at least one of which is made with the possibility of reciprocating movement relative to the other along the guides, as well as a reading mechanism.

Moreover, the device may contain at least one carriage on which a plane-parallel sponge is fixed.

The device may comprise a ball screw pair for moving the carriage.

The reading mechanism can be made in the form of a raster line, mounted on the base and a read head, mounted on the carriage.

The process of measuring the size of caliber brackets is to determine the minimum size between the working surfaces of the bracket, i.e. between the most protruding points of opposite surfaces (since the working surfaces of the bracket are not perfectly smooth). Moreover, these most protruding points of the working surfaces of the bracket are usually not located opposite each other. Therefore, it is necessary that when measuring the size of the staples, the jaws touch exactly the points indicated above.

The placement on the basis of the claimed device guides, two plane-parallel jaws, at least one of which is made with the possibility of reciprocating movement relative to the other along the guides, as well as a reading mechanism, allows the application to apply the same effort to the working surfaces of the measured bracket, in contrast from the point forces exerted when measuring with a caliper, which can lead to deformation of the bracket. As well as the execution of the jaws plane-parallel and of any length within the base, it is possible to carry out during the measurement process the tight contact of each jaw with the entire plane of the corresponding working surface of the bracket. In this case, the measurement will be made between the two most protruding points on the working surfaces of the bracket, in contrast to the measurement with a caliper - between the points selected on the eye that were touched by the lips of the caliper. Moreover, the design of the claimed device provides for automatic measurement processing. All of the above advantages of the claimed device allow, in comparison with a caliper, to increase the accuracy of measurements, as well as

increase productivity by reducing the complexity and time taken to perform measurements.

The proposed invention is illustrated by the schematic drawings shown in figures 1-2, which depict:

figure 1 - General view of the device,

figure 2 is a top view of a device (the bracket is not shown).

A device for determining the dimensions of caliber brackets 1 contains a base, made, for example, in the form of a frame 2, on which the guides 3, 4 are placed, along which the carriage 5 is moved with a ball screw pair 6. Plane parallel mounted on the carriage 5 and on part 7 of the frame 2 jaws 8 and 9, respectively. To determine the amount of movement of the carriage, the device is equipped with a reading mechanism made, for example, in the form of a displacement sensor containing a raster line 10 mounted on a frame 2, a read head 11 mounted on the carriage 5, and an electronic unit with digital indication (not shown in the drawings).

The thickness of the plane-parallel jaws 8 and 9 may be different, while the sum of their thicknesses should be less than the minimum measured size.

The accounting mechanism can be various, made, for example, in the form of a ruler with a pointer, a linear displacement sensor, in the form of a clockwork, etc.

The final measurement result can be obtained automatically and displayed on a digital indicator (not shown in the drawings).

A device for determining the size of caliber brackets works as follows.

The first measurement option. Determine the thicknesses l ₁ and l _{2 of} two plane-parallel jaws 8 and 9 mounted respectively on the carriage 5 and on part 7 of the bed 2. By means of a ball screw 6, the carriage 5 is moved until the plane-parallel jaws 8 are snug against each other

and 9. In this position, the linear displacement sensor, consisting of a raster line 10, a read head 11, and an electronic unit with digital indication (not shown), is zeroed. Device mounted on bracket 1, the size L which should be measured, and moving the carriage 5 along the guide rails 2 and 3 provide a tight fit of the two plane-parallel jaws 8 and 9 of the working surfaces of the bracket 1. Using linear displacement sensor determined value l _edited moving the carriage. The size L of the bracket 1 is calculated as the sum of the thicknesses l ₁ and l _{2 of the} plane-parallel jaws 8 and 9, respectively, and the values of l _meas :

L = (l ₁ + l ₂ ) + l _meas

The second measurement option. A bracket is installed on the device with a known size l _et . By means of a ball screw pair 6, the carriage 5 is moved until the plane-parallel jaws 8 and 9 fit snugly against the working surfaces of the reference bracket. In this position, the value of l _et is introduced into the electronic unit of the linear displacement sensor. Next, instead of a reference bracket, a bracket 1 is installed on the device, the size L of which must be measured and the carriage 5 is moved until the plane-parallel jaws 8 and 9 are firmly attached to the working surfaces of the measured bracket 1. At the moment of tight-fitting plane-parallel jaws 8 and 9 to the working surfaces of the measured bracket 1 are read reading from the electronic unit of the linear displacement sensor, the value of which corresponds to the size L of the measured bracket 1.

Claims (4)

1. A device for determining the dimensions of caliber brackets includes a base on which the guides are placed, two plane-parallel jaws, at least one of which is made with the possibility of reciprocating movement relative to the other along the guides, and also a reading mechanism. 2. The device according to claim 1, characterized in that it contains at least one carriage on which a plane-parallel sponge is fixed. 3. The device according to claim 2, characterized in that it contains a ball screw pair for moving the carriage. 4. The device according to claim 2, characterized in that the reading mechanism is made in the form of a raster line, mounted on the base and a read head, mounted on the carriage.