SU1328038A1 - Apparatus for rewinding continuous material - Google Patents

Abstract

The invention relates to the field of machine tools, can be used in machines that produce nonwoven wire material, such as wire dampers, and allows you to expand technological capabilities by ensuring the rewinding of the helix while simultaneously pulling it. The speed of receiving the stretched helix is chosen more than the feed rate of the unstretched helix, the step of the stretched helix is monitored with the help of an inductive helix pitch sensor and, when it deviates from its nominal value, the feed rate of the unstretched helix is automatically changed. The device comprises a base 1, a wire helix receiving unit 2, a wire helix supply unit 3, an inductive coil pitch sensor 4, isolating, a gasket 5, a wire coil 6, an amplifier 7, an amplitude detector 8, a comparison unit 9, a low-pass filter 10, an amplifier 11, step generator 12, switch 13, indicator 14, and current pulse generator 15. Due to current pulses flowing in helix 6, a magnetic field is created around it, the value of which is inversely proportional to the helix pitch and measured by an inductive 4 step sensor line, the output of which through the blocks 7 ... 1 controls the node 3 of the wire spiral feeding. 13 p. F-ly, 6 ill. f (L, VVWV4 / V A from 00 00 to 00

Description

The invention relates to the production of non-woven wire material and can be used in enterprises where elements of this material are made, for example wire shock absorbers.

The purpose of the invention is the expansion of technological capabilities by ensuring the rewinding of a spiral while stretching it.

FIG. 1 shows a functional diagram of the device; in fig. 2 - functional layout of the wire helix; in fig. 3 is a functional diagram of the wire helix receiving unit; in fig. 4 - the functional set point controller; in fig. 5 - functional diagram of the generator of stable current pulses; in fig. 6 - inductive current sensor.

The device comprises a base 1 on which a wire helix receiving unit 2, a wire helix supplying unit 3 and an inductive coil pitch sensor 4 are installed, the wire helix supplying unit 3 being electrically isolated from the base 1 through an insulating gasket 5. Wire helix 6 from unit 3 supply wire spiral enters the node 2 receiving the wire spiral through the inductive sensor 4 pitch spiral, the first output of which is grounded, and the second through successively connected amplifiers 7, amplitude detector 8, block 9 comparison , the low-pass filter 10 and the amplifier 11 is connected to the control input of the wire helix supply unit 3. The second input of the comparator unit 9 is connected to the output of the step setter 12, both inputs of the comparator unit 9 are also connected to the inputs of the switch 13, the output of which is connected to the input of the indicator 14. The output of the generator of stable current pulses is connected to the wire helix unit 3, and its common the wire is grounded.

The device works in the following way.

After switching on the device (supplying-voltage of it to all nodes), the node 3 of the supply of the wire helix starts feeding the unstretched spiral with the speed V |. The coil 6 passes through a hole in the inductive sensor 4 and enters the wire coil receiving unit 2, which receives it at a constant speed Va, and, as a result, the coil is stretched.

Maintaining the desired pitch of the extended helix is accomplished by controlling the feed rate of the helix Vi by the node 3 feeding the wire helix with the help of an electronic circuit consisting of blocks 7 ... 15 as follows. The generator 15 of stable current pulses generates current pulses that are stable in magnitude with a repetition rate of 10 ... 100 kHz, which are fed to the wire helix supply unit 3. This should be done

the condition for obtaining a good electrical contact with the helix 6, which is easily achieved when performing all the details of the metal wire feeding unit 3.

Further, the current pulses in the helix 6 enter the wire helix receiving unit 2 connected to the base 1, which must also be made of metal parts to ensure electrical contact with the helix 6. The coil 6 represents a solenoid, and the current flowing through it creates an electromagnetic field around it, which is proportional to the number of turns in the solenoid, and this is uniquely associated with the pin of coil 6, i.e.

5 the smaller the pitch, the stronger the electromagnetic field around the helix 6.

Measurement of the value of the electromagnetic field around the spiral 6 is carried out using an inductive sensor 4 steps, a spiral, the output voltage of which is 0 MW is proportional to the value of the electromagnetic field and, therefore, inversely proportional to the pitch of the spiral. The output voltage of the inductive sensor 4 of the pitch of the helix is amplified by the amplifier 7 and degraded by the amplitude detector 8. Thus, the voltage at the output of the amplitude detector 8 is uniquely associated with the pitch of the helix 6. With the aid of the unit 12 of the pa output of its output, a constant voltage is established, the value of which corresponds to the required pitch of the helix 6, which is fed to the second input of the comparator unit 9, the first input of which is connected to the output of the amplitude detector 8.

In case of equality of signals received

5 to both inputs of Comparison Unit 9; i.e., in the case when the step of the extended helix corresponds to the required value, the signal at the output of the comparison unit 9 is equal to zero, equal to zero and arriving at the control input of the wire feed unit 3

0 helix control voltage from the output of amplifier 11. In case the pitch of the coil 6 deviates from the required value, for example, when the pitch of the coil 6 increases, the output voltage of the amplitude detector 8

d decreases, the negative voltage appears at the output of the comparator block 9, which through the low-frequency filter 10 and the amplifier 11 enters the control input of the wire helix supply unit 6. Otherwise, the feed rate of the helix 6 decreases to the required value. Due to this, a constant helix pitch value is achieved.

The control of the schag spiral 6 is carried out using an indicator 14, which is calibrated directly in units

5 steps spiral. By means of the switch 13, the indicator 14 can be connected either to the output of the unit 12, or to the output of the amplitude detector 8.

The wire helix supply unit 3 (FIG. 2) consists of a supply drum 16, onto which unwound helix 6 is wound, two rubberized rollers 17 and 18, between which helix 6 is missed, and the roller 17 to prevent slippage of the helix 6 is spring-loaded 19. The roller 18 is connected via a belt transmission 20 to a direct current motor 21, which is powered from the output of amplifier 11. The axis of the supply drum 16 is electrically connected to the output of the generator 15 of stable current pulses.

The wire helix receiving unit 2 (Fig. 3) consists of a receiving drum 22, in which the stretched helix 6 is wound in a helical groove along a generator. The receiving drum 22 is connected with a direct current motor 24 by means of a belt drive 23, the power of which is constant voltage from the power source.

The unit 12 of the pitch of the helix (Fig. 4) consists of a constant voltage source 25 and a potentiometer 26, by means of which the required output voltage is established.

The stable current pulse generator 15 (Fig. 5) consists of a stable current source 27, a key 28 and a clock generator 29. The clock generator 29 produces pulses with a repetition rate of 10 ... 100 kHz, which is controlled by the key 28, through which the output current source 27 stable current is fed to the output device.

Inductive sensor 4 schag spiral (Fig. 6) consists of a cylindrical frame 30 and the winding 31.

Claims (2)

1. A device for rewinding a lengthy material, comprising a sensor and a sensor for rewinding parameters, connected to the first input of the comparison unit, a filter, an amplifier, a supply unit and a receiving unit, characterized in that, in order to improve technological capabilities rewinding a helix while simultaneously stretching it, it has an additional amplifier, an amplitude detector and a generator of stable pulses, the output connected to the helix, with the helix pitch selected as the rewind parameter parameters of rewinding is schaga setpoint and a parameter sensor winding is formed as an inductive sensor, the inductive sensor output through an amplifier and an amplitude detector connected to second | 1hodom the comparator, output connected via filter and additional amplifier with a feed unit. 2. The device according to claim 1, characterized in that it has a registration unit containing series-connected the switch and the indicator; in this case, the switch inputs are connected respectively to the outputs of the amplitude detector and the reference point. 2 /  fs block to block // FIG. g Z6 FIG. five L Output ig. ig.5 3 / Compiled by C. Khachaturov Editor V. PetrashTekhred I. VeresKorrektor L. Pilipenko Order 3429/12 Circulation 582Subscription VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk office, 4/5 Production and printing company, Uzhgorod, ul. Project, 4 ipue 6