SU930001A1 - Device for measuring gap between parts being cemented - Google Patents

Description

(54) DEVICE FOR MEASURING THE CLEARANCE BETWEEN GLUE PARTS

The invention relates to a control. Measuring technique and can be used to measure the gap between the parts to be glued, for example, in aircraft construction to control glued structures.

A device for measuring the gap between the parts is known, consisting of probes with different opening angles placed in the same direction.

However, this device allows to measure the gap only at the edges of the parts. ,

The closest in technical essence to the present invention is a device for measuring the gap between the parts to be glued, comprising a series-connected alternator, a current, an inductive transducer, including a housing, a magnetic core and an inductor, phase detector, indicator and a phase regulator connected between the generator output and the second input of the phase detector. The device makes it possible to measure the gaps both at the edges, and in the center of the gluing & gllh of details of a large area G2.

However, the device has insufficient measurement accuracy due to the fact that the inductive transducer presses against the surface of the controlled product with an unnormalized force and, consequently, the tie takes into account the possible deformation of the glued parts of the product.

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

The goal is achieved in that the device is equipped with a control key connected between the output of the phase detector and the indicator, and

15 with a force sensor connected via an amplifier to the control input of the switch, and the inductive converter is equipped with a magnetic flux concentrator attached to the magnetic core of the core of the inductor and an elastic element for accommodating the force sensor fixed on the housing at the end of the magnetic flux concentrator.

25

Fig. 1 shows a circuit diagram of a device for measuring the gap; Fig. 2 shows an example of a constructive embodiment of an inductive gap transducer with a force sensor integrated into its body.

A device for measuring the gap between the parts to be glued together comprises an alternating current generator 1, an inductive transducer. 2, the force sensor 3 built into it, connected to the outputs of the inductive converting 5 bodies and the sensor amplifiers: 4 and | 5, phase detector b, phase regulator 7 connected to its second input, control key 8 and indicator 9. Inductive The converter 2 includes a housing 10, a magnetically conductive core 11, an inductor 12 located thereon and a magnetic flux concentrator 13 attached to the core 11 on the axis 5 of the inductor 12. The force sensor 3 built into the housing 10 of the transducer 2 is placed on an elastic element 14 rigidly mounted on the housing 10 from the end of the concentrator 13 of the magnetic flux.

The device works as follows.

When installing an inductive transducer 2 on the surface of a controllable js product, which is, for example, two sheet parts prepared for gluing, excite an alternating current generator 1 feeding the transducer 2. The signal at the output of the inductive transducer prevents the gap between the glued details (not shown), amplified by amplifier 4 and fed to one of the inputs of the phase detector b, to the other input of which 35 is supplied the reference voltage generated by using phase regulator 7. However, the measured voltage the signal does not pass through the control key 8 to the indicator 9 until the key 8 is opened 40 under the action of the signal from the sensor 3 usi / and the corresponding value. The latter generates an electrical signal at a pressure on the parts to be glued, for example, generated by the hand 45 of the controller, which is transmitted through the concentrator 13 to the elastic element 14 and the force sensor 3. When the pressure reaches a predetermined value (for example, 3 kg / cm), the signal of the sensor 3 amplified in the amplifier 5 eg at the control input of the switch 8 becomes sufficient to open it. In the cut / gutte signal of the inductive converter, corresponding to the gap between the parts to be glued. for a given force of pressing the converter to their surface, passes on the indicator 9

Due to the fact that the gap between the parts to be glued is determined at the same, predetermined, standardized pressure on the parts to be glued, the accuracy of measurements is improved. Using the proposed device, it is possible to measure the gap on any part of the surface of the extended parts both at the head and at their center. One measurement takes only a few seconds.

Claims (2)

1. For France 2395485, cl. G 01 B 5/14, 1979. 2. USSR author's certificate No. 260191, cl. G 01 B 7/06, 1967 (prototype). CD one