SU1712768A1 - Device for measuring diameter of cylindric parts - Google Patents

Abstract

The invention can be used to measure the diameters of large-sized parts. The purpose of the invention is to improve the measurement accuracy. The device comprises a housing 1 with a sensor of 3 linear movements, movable clamping tips 4, electrical contacts 9. After orientation and pressing the device to the measured surface, electrical contacts 9 are closed, forming a signal for reading data from sensor 3. 2 Il.

Description

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The invention relates to a measurement technique, namely, to means for measuring parts of large dimensions.

A device for measuring the shape of cylindrical parts, comprising a base of the object under control, a radially movable carriage with self-supporting supports made in the form of multi-stage balancers, and a linear displacement meter are known.

The large dimensions of this device, the difficulty in manufacturing and the need to base the part being monitored limit the field of application of the device and reduce the efficiency of its use.

It is also known a device for measuring the curvature of a once curved surface, comprising a housing with a handle, measuring and clamping non-contact elements, a linear displacement sensor and a reading device.

Such a device is compact and does not require a base and: measurable parts; However, the accuracy of the data obtained in the measurement depends on the accuracy of the orientation of the device relative to the measured surface, which is difficult to manually do.

The purpose of the invention is to improve the measurement accuracy.

This goal is achieved by the fact that the device is designed as a cross with a linear displacement sensor in the center, provided with electrical contacts connected in a serial electric circuit and placed on the clamping elements, and the tips are made spring-loaded, fixed in the clamping elements and designed for interaction with the electrical contacts. When the device is oriented at an angle of 45 ° to the measured part, the contact elements are closed, forming a signal to read data from the sensor.

A distinctive feature of the proposed device is (supplying it with electrically connected groups arranged on a series electric circuit and placed on the clamping elements, which are closed by moving the clamping tips when the device is installed in the measuring position.

FIG. 1 shows the proposed device, side view; fig 2 is the same, top view.

The device comprises a housing 1 made in the form of a cross with a handle 2, in the center of which there is a sensor 3 linear displacements, and at the ends of the cross there are four movable clamping elements (tips) 4 equidistant from the center 4. These tips are made with the possibility of limited movement in guides 5 , are kept in the initial position by springs 6 and contain spherical tips 7 at one end, and at the other - contact pads 8, designed to interact with elements 9.

During the measurement, the device is pressed by the movable clamping elements 4 to the measured surface 10. As a result, the contact pads 8 close the clamping elements, forming a serial electric circuit and issuing a signal to read data from the sensor 3. The closure of all four contact groups is possible only when the device is oriented at an angle of 45 to the axis of the measured cylindrical surface (Fig. 2), which excludes data acquisition with an error caused by the inaccuracy of fixing the device in the measuring position.

The use of the proposed device under production conditions makes it possible to measure (control) both individual large-sized cylindrical parts and the surfaces of individual blanks, measure the curvature of the surfaces of parts during bending, etc., at minimum cost.

Claims (1)

Formula of invention A device for measuring the diameter of a cylindrical part, comprising a case, mounted in the case and designed for interacting with the part clamping elements with tips and a linear displacement sensor, characterized in that, in order to improve the measurement accuracy, it is provided with connected in a series electric circuit and placed on the clamped elements by electrocontacts, and the tips are made spring-loaded, fixed on the base elements with the possibility of movement and are designed to interact with switch.