SU1551997A1 - Pneumatic device for measuring linear dimensions - Google Patents

Abstract

The invention relates to a measurement technique, namely, to means for measuring the linear dimensions of porous products, in particular polished wheels. The purpose of the invention is to reduce the setup time of the device by automating the installation of the measuring gap and the measuring force for each measured product. Through the measuring gap and measuring force control unit 3, the nozzle of the pneumatic induction sensor 2, when initially adjusted to the required size, contacts the mounting measure with a certain measuring force value set by the force adjuster 5, and then is set to a specific measurement gap specified by the clearance adjuster 4. The magnitude of the measuring force is monitored by a differential pressure sensor 11 connected to the sensor chambers and set by the pressure regulator 9 on command from the control unit 3. Similarly, the measuring unit 1 and the second pressure regulator 10 automatically establish the measurement gap. 1 il.

Description

one

(21) 4458285 / 25-28

(22) 04/11/88

(46) 03/23/90. Bksh. № 11

(71) Volzhsky branch of the All-Union Scientific Research Institute of Abrasives and Grinding

(72) V.E.Nadel and O.V.Sukhorukov (53) 531.717.1 (088.8)

(56) USSR Copyright Certificate No. 3035D4, cl. G 01 B 13/02, 1971.

US patent No. 3802086, CL. G 01 B L / 20, 1972.

(54) PNEUMATIC DEVICE FOR MEASURING LINEAR SIZES (57) The invention relates to a measurement technique, in particular, to means of measuring the linear dimensions of porous products, in particular ground wheels. The purpose of the invention is to reduce the device setup time by automating the installation of the measuring gap and the measuring force for each measured product. By the middle

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the first block of control of the measuring gap and the measuring force, the nozzle of the pneumo-inductive sensor 2, when initially adjusted to the required size, contacts the mounting measure with a certain value of the measuring force specified by the force setting unit 5, and then is set to a specific measuring gap set by

The invention relates to a measurement technique, namely, to means for measuring the linear dimensions of porous products and, in particular, grinding wheels.

The purpose of the invention is to reduce the setup time of the device by automating the installation of the measuring gap and the measuring force for each measured product.

The drawing shows a pneumatic device.

The device contains a batch unit 1, a follow-up pneumo-inductive sensor 2, a unit 3 controlling the measuring gap and measuring force, a measuring gap setting unit 4 and a measuring force setting unit 5, spools 6-8, pressure regulators 9 and 10, and a differential pressure sensor 11.

The following pneumoinductive sensor 2 is made in the form of a cylinder 12 with a piston 13, which is a sensitive element and separates the cylinder cavity into the measuring chamber 14 and the backpressure chamber 15. Each of the chambers is connected to the inputs of the differential pressure sensor 11. The measuring chamber 14 and the backpressure chamber 15 through constant chokes 16 and 17 are connected to the spool 6. In addition, the normally closed spool 7 and the pressure regulator 9 are connected to the measuring chamber 14 and the normally open spool connected to the backpressure chamber 15 8 and a pressure regulator 10.

Power supply of the following pneumoinductive sensor 2 with compressed air by means of an insulator 4 gap. The magnitude of the measuring force is monitored by a differential pressure sensor 11 connected to the sensor chambers and set by the pressure regulator 9 on command from the control unit 3. Similarly, the measuring unit 1 and the second pressure regulator 10 automatically establish the measurement gap. 1 il.

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It is supplied from a pressure supply source through a pressure stabilizer 18.

A measuring nozzle 20 is mounted on the rod 19 of the follow-up pneumo-inductive sensor 2, communicated with the measuring chamber 14. The output inductive transducer 21 of the following pneumo-inductive sensor 2 is connected to the reference unit 1.

Regulators 9 and 10 are nozzle-flap-type devices, the damper 22 being made movable, moved by a reversing actuator 23. Manometer 24 is designed to monitor the supply pressure of the follow-up pneumatic inductive sensor 2.

The measuring gap control unit 3 and the measuring force are made in the form of a numerical control device, the inputs of which are connected to the outputs of the reference unit 1 of the measuring gap setting device 4 and the measuring force setting generator 5 of the differential pressure sensor 11. At the output of the unit 3, it is connected to the inputs of the regulators 9 and 10 of pressure with the control inputs of the spools 6-8.

The device works as follows.

Using the measuring gap setting unit 4 and the measuring force setting unit 5, the required values of the measurement gap and measuring force for specific measurements are set. Next, the pressure stabilizer 18 sets the working supply pressure of the tracking pneumo-inductive sensor, which is monitored by the pressure gauge 24.

The Setup command launches the work program of block 3, in accordance with

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with which the valve 6 is engaged, thereby providing compressed air supply to the follow-up pneumo-inductive sensor 2. Compressed air under supply pressure enters the measuring chamber 14 and the backpressure chamber 15, respectively, through constant chokes 16 and 17. From measuring chamber 14 is compressed air enters the atmosphere through the cavity of the rod 19, the measuring nozzle 20 and the annular measuring gap. Compressed air escapes from chamber 15 through the normally open valve 8 and the pressure regulator 10 to the atmosphere. Since from the chamber 15 of the backpressure air practically expires into the atmosphere, Resis, due to the action of si-pi generated due to the pressure difference in the measuring chamber 14 and the chamber 15 of the counterpressure, the pressure 13 with the rod 19 is shifted to the extreme upper position. This frees up the work area to set the installation measure at the measurement position. The installation measure can be made as a set of standard end measures or a reference product with the required linear,

With a time delay sufficient to install the gauge on the base elements, block 3 sends the command to turn on the spool 8. This sharply reduces the air flow from the backpressure chamber 15 to the atmosphere and sets the pressure determined by the setting of the pressure regulator 10. Under the action of the newly formed pressure drop in the measuring chamber 14 and the backpressure chamber 15, the piston 13 with the rod 19 moves downward to the mounting measure until the measuring gap between the surface to be controlled and the end face of the nozzle 20 is established. The pressure in the chambers stops and stops with the stem. When the pressure differential is close to zero, the differential pressure sensor 11 outputs a permitting signal to the unit 3 to turn on the spool 7. From the measuring chamber 14, the air starts to be further vented to the atmosphere through the pressure regulator 9. The measuring nozzle 20 smoothly comes into contact with the installation measure.

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A typical measuring pressure is determined by the differential pressure in the measuring chamber 14 and the backpressure chamber 15 and is congressed by a differential sensor and pressure. In block 3, the value of the current measuring pressure is compared with the measuring force, after IQ by this measuring force setting unit 5, and if they differ, block 3 issues a command to move the damper 22 of pressure regulator 9 by reversing drive 23 to;

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effort The magnitude of the measuring force can be regulated: to disappear. G maximum value to zero. The fluctuations of the supply pressure of the C-A and 20 i pneumatic inductance of the sensor 2 do not affect the magnitude of the measuring force, since the measuring chamber 14 and the chamber 15 of the backpressure are connected to a pressure source

25 laziness according to the differential scheme through constant chokes 1 (S and 17, having the same consumable characteristics.

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The signal 20 with the gimbal gamble is fixed at IK. io / shock 19, which is in (. in block 3. The last issued a command to deactivate the spool 7. The air from the measuring chamber 1 is turned. into the atmosphere4 Fu through pressure regulator 9 and i-nov; 1 y tor - Pom measuring con ia 20 and set.

40 The measurement gauge is set to measure. The magnitude of the current value of the measuring gap, the differential difference of the indication of the block 1 of reference at the steady-state gap and

45, the initial contact of the measuring nozzle 20 s is accounted for, compared in block 3 with the value specified by the measuring gap 4. In the case of

the misalignment of the flank will issue a command to the reversing springs: 23 of the pressure regulator 10 for the movement of the valve 22. By moving the valve it is possible to establish a penalty of the measuring gap. On oyunchanii

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measurement settings in

memory block 3 is entered information

about the size of the set measuring gap, and a command is issued to turn off the spool 8. Next, npoucj- the measuring nozzle 20 goes up. The device is configured and ready for measurement.

The process of measuring linear dimensions is carried out in the following sequence.

The installation measure is replaced by a test article, for example, a grinding wheel from a batch of wheels of one grain of abrasive material and a certain porosity of the bond, and the measuring gap is determined in the previously described sequence for one particular test article. is produced in a contactless way by tracking with a constant measuring gap by the nozzle of the follow pneumoinductive sensor 2 for the profile is controlled of the product. The measurement results are recorded by a reference unit 1.

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Claims (1)

A pneumatic device for measuring linear dimensions, comprising a reference unit and a follow-up pneumatic-inductive sensor with a measuring chamber and a counterpressure chamber separated by a sensing element, each chamber connected to a power source through corresponding molders and pressure regulators, characterized in that in order to reduce setup time, the device is equipped with measuring gaps and measuring force, a measuring gap control unit and measuring gauge. A differential pressure sensor, the inputs of which are connected to the measuring chamber and a backpressure chamber, outputs from the setters, a differential pressure sensor, and a reference block are connected to the inputs of the control gap and measuring force, the outputs of which are connected to the control inputs of pressure regulators and spool inputs .