RU2464529C1 - Adjustment and calibration device for pneumatic dimensional check units - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: device includes pneumatic instrument connected via communication line to measuring equipment, calibration instrument the input of which is connected to pneumatic instrument, and output is connected to measuring equipment. Calibration instrument consists of the valve shutting off the communication line of pneumatic instrument with measuring equipment, calibration elements for simulation of measuring gaps in the form of adjustment throttles of measuring gap, which are located between instrument-equipment communication line and atmosphere, as well as valves for switching on and off the communication of throttles to atmosphere.

EFFECT: increasing the efficiency of adjustment and periodic calibration of maintenance of adjustment accuracy.

1 dwg

Description

The invention relates to pneumatic measuring equipment and can be used to configure pneumatic dimensional control units and to verify the degree of accuracy during the control operation.

Known adjustment of pneumatic devices, which is performed using high-precision mounting parts subject to wear. Installation details are used both at the beginning of work to adjust the sorting boundaries, and during the control operation in order to determine the failure of the initial setting level. The setup process consists in installing through a certain number of measurements of the mounting parts in the measuring tool, corresponding to the lower and upper border of the tolerance field. If you save the settings, the parts are considered valid.

Known tuning methods lead to the need for conducting clean checks of the accuracy of control of measuring instruments, which leads to significant loss of time, reduced productivity of control operations, as well as to rapid wear of installation parts and, as a result, to an increase in the percentage of false marriage.

The objective of the invention is to increase the performance of the settings and periodic verification of maintaining the accuracy of the settings.

The specified technical result is achieved by the fact that the device for setting up and checking pneumatic dimensional control units contains a pneumatic device connected by a communication line with measuring equipment, a calibrator, the input of which is connected to a pneumatic device, and the output - with measuring equipment. The calibrator consists of a valve that shuts off the communication line between the pneumatic device and the measuring tool, calibrating elements for simulating measuring gaps in the form of throttles for adjusting the measuring gap between the tool-tool communication line and the atmosphere, as well as valves for turning the chokes on and off with the atmosphere.

The device for adjustment and verification is illustrated by the drawing, which shows the metrological diagram of the device containing the inlet fitting 1, the throttle 2, interacting with the valve 3 of communication with the atmosphere, the valve 4, interacting with the throttle 5, valve 6 of the communication line overlap long-snap, output fitting 7.

The measuring tool 8 is connected through a calibrator 9 with a pneumatic length meter 10.

A device for tuning and checking pneumatic units of dimensional control works as follows.

In the initial position, the working gas under constant pressure enters the pneumatic device 10 and then through the inlet 1 of the calibrator 9, the valve 6 and the outlet 7 enters the measuring tool 8 and through the measuring gap S between the end of the measuring nozzle d2 and the surface of the controlled part 11 goes into the atmosphere.

Since the main task of the control operation is to determine the degree of conformity of the controlled part 11 to the tolerance field for the controlled size N, then adjustment is made before starting.

Close valve 6, while disconnecting the measuring tool 8 from the length meter 10. Simulate mounting parts with gaps S1 and S2 in the calibrator 9.

To do this, open the valve 3 and adjust the throttle 2 to set the upper limit "a" of the tolerance field of the pneumatic device 10, after which the valve 3 is closed.

Then open the valve 4 and establish in the throttle 5 a measuring gap corresponding to the lower boundary "b" of the controlled tolerance. Close valve 4 and open valve 6. After the adjustment, the device is ready for operation.

The device is set up no more than once per shift. In other cases, verification of the settings for each boundary of the tolerance field is performed by simultaneously pressing valve 6 and, alternately, valves 3 and 4.

Thus, the use of a calibrator that simulates measuring gaps corresponding to the boundaries of the tolerance field, using independent chokes installed on the communication line between the device and the equipment, made it possible to increase the performance of tuning and periodic verification of preserving the tuning accuracy during dimensional control without the use of mounting parts.

Claims (1)

A device for adjusting and checking pneumatic dimensional control units containing a pneumatic device connected by a communication line with a measuring tool, characterized in that it is additionally equipped with a calibrator, the input of which is connected to a pneumatic device, and the output - with a measuring tool, consisting of a valve for closing the pneumatic communication line instrument with measuring equipment, calibrating elements to simulate measuring, clearances in the form of chokes to adjust the measuring gap between the communication line tooling and atmosphere, as well as valves for switching on and off the connection of throttles with the atmosphere.