SU1142303A1 - Method of monitoring process of shaping complicated mould shell - Google Patents

Abstract

METHOD OF CONTROLING THE PROCESS OF FORMING THE SHELL OF COMPLEX SHAPE by determining the position of the geodesic line along which the reinforcing fiber tape is wound onto a rotating mandrel with a thread stacker, characterized in that, in order to improve the accuracy of control of the position of the geodesic line, it is separated from the fiber ribbon yarns spaced apart from each other at a distance proportional to the minimum radius of curvature of the surface of the mandrel, while laying, they continuously measure the length of each laid yarn, calculating dissolved difference of measurement results from each thread, the sign of the difference is set direction, and the largest - the speed of movement of the traverse control. (In 4 1C 00 about OO

Description

The invention relates to the production of reinforced shells of complex shape and can be used in the chemical, aviation, shipbuilding and other industries.

A known method of controlling the process of forming shells of complex shape by determining the position of the geodesic line along which the reinforcing fiber tape is wound onto a rotating mandrel using the yarn guide 1.

According to a known method, the tape is manually handled by the handler, placed on the surface of the mandrel at the required angle between the tangent to the winding line and the meridian, searching for the path (direction) of the tape at which the tape does not slip.

The known method has the disadvantage that, in view of the presence of friction forces, the tape is held on the surface even with significant deviations from the geodesic line, which leads to a large error in finding the latter.

The aim of the invention is to improve the accuracy of control of the position of the geodesic line.

The goal is achieved by the method of controlling the process of forming a complex-shaped casing by determining the position of the geodesic line along which the reinforcing fiber ribbon is wound onto a rotating mandrel using a yfrakkladchikch, two threads are separated from the fiber ribbon when proportional to the minimum radius of curvature of the surface of the mandrel, when laying, they continuously measure the length of each laid yarn, calculate the difference in measurement results from each and the sign of the difference is set direction, and the largest - the speed of movement of the traverse control.

The drawing schematically shows a device for implementing the method.

On the surface of the mandrel 1 with a convex ending of an arbitrary shape, a ribbon is laid along the geodesic line 2, the extreme threads in which are designated 3 and 4. The folder spreader 5 ensures the passing of the laid ribbon entering through the winding impregnating path installed at any place machines guiding the pins 7, which serve to orient the ' edge threads, from the rollers 8, which can be rotated around the respective axes. The rollers 8 are rigidly connected with slots 9. A photodetector 10 and a source

 11 lights, also mounted on base 6.

The output signals from the photodetectors 11 are received through the-formers 12 electrical signals and the synchronizer 13 to the inputs of the reversible counter 14, which has indicators of 15. and 16 characters of the speed-binner speed correction.

The essence of the proposed method is to use the following

0 properties of the geodesic line: the thread laid along it has the shortest length, and deviation from the geodesic leads to an increase in this length, which will be proportional to the deviation.

5 To control the position of the geodesic line, two extreme threads are separated from the fibrous tape, the distance between which is the minimum radius of curvature of the mandrel surface; K - coefficient of friction tape on the surface.

The method of controlling the position of the geodesic line on the surface of the mandrel is carried out as follows.

5 When the mandrel is rotated at the speed of Uoi and the thread stacker moves at the speed of Uukl, the tape is wound onto the surface of the mandrel. Moreover, if the tape will be laid on the surface of the mandrel along a geodesic line, the length

0 of both extreme threads will be equal and the difference in length is zero. After the tangent points reach the extreme threads of the mandrel surface at the border of the mandrel changing curvature (points A and B) and the tape reaches the section with a new curvature (arc lengths of the extreme threads L X and BB), the middle line of the tape will fit already jie along the geodesic and length of arcs AA and BB will differ from one another, and the middle of the tape coincides with the geodesic only

In the case of, laid lines, arcs XX and BB are equal or AA - BB 0. In case of non-fulfillment of this condition, the speed of the threadpacker must be adjusted.

The outer yarns 3 and 4 of the winding tape are guided through the guide pins 7 for 5 seconds around the rollers 8 (1-2 turns) and then wound on the mandrel 1. When the threads 3 and 4 move, the rollers 8 cause the disks 9 to rotate openings in which open light

0 flow from the light sources 11 to the photodetectors 10, issuing a signal to the drivers 12. The output signals from the drivers 12 are fed to the synchronizer 13, which provides a time difference between the signals to the addition and subtraction inputs of the binary reversing counter 14 with the character indicators 15 and 16, which show the direction of the speed correction folder stacker.

- 1142303.

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When winding continuously, the measured yarns tended to zero. Wherein

the length of the extreme strands 3 and 4, compare the sign of the difference of the measurement results

The results of measurements, and the result of the comparison of lengths, establish the direction, and they use as information about the deviation of the source - the speed of movement of the thread of the middle of the tape from the geodesic. For the marker.

accurate positioning of the middle of the belt along the geode. The proposed method allows the circular line to change the direction and to determine the accuracy of controlling the position of the geodex of the thread stacker so that the time line in the process of forming

between the measured lengths of the edge-shell of a complex shape.

Claims (1)

(5.7) METHOD FOR MONITORING THE PROCESS OF FORMING A COMPLEX SHAPED Shell, by determining the position of the geodesic line, along which the reinforcing fiber tape is wound on a rotating mandrel using a yarn spreader, characterized in that, in order to improve the accuracy of monitoring the position of the geodetic line, it is isolated from the fiber tape two threads spaced one from the other at a distance proportional to the minimum radius of curvature of the surface of the mandrel, when laying, continuously measure the length of each laid thread, calculate p the variability of the measurement results from each thread, the direction is determined by the sign of the difference, and the speed of the threading device is determined by the magnitude.