KR930006008B1 - Inverter system for spinning machine - Google Patents

Abstract

The inverter system gradually increases the speed of cop rotation the winding of yarn moves from the initial position to the normal position and also adjusts the speed of cop rotation within a proper range for decrease or increase of the speed in correspondance to the up-and-down movement of the ring rail to kiip constant the tension of the yarn for winding on the whole portion of the cop and prevent the yarn from breadking off. The inverter system includes a computer, a control, a drive panel, a sensor and an inverter. The control changes the speed of cop rotation through the inverter.

Description

Inverter system of spinning machine

1 is a block diagram of a system of the present invention;

2 is a schematic view of the operation state of the spinning machine,

3 is a table for explaining the traverse control function by the system of the present invention,

4 is a rotation speed control state diagram of the cobb according to the present invention system,

5 is a flow diagram of simultaneous doping control by the present system.

* Explanation of symbols for main parts of the drawings

1: Main computer 3: Control part

6 driving panel portion 7 display portion

8: I / O Block 9: Position Sensor

10: Inverter

The present invention relates to an inverter system of a spinning machine, and more particularly, to an inverter system of a spinning machine for effectively preventing the trimming generated when driving the spinning machine.

In general, the thread trimming means that the single yarn is broken by the tension applied to the single yarn when the single yarn is wound on the cop in the spinning machine, and the greatest tension is applied in the outermost part of the cobb and less tension toward the normal part. The tension difference also occurs in the vertical movement of the ring rail for winding single yarns in the corps, which causes the trimming.

In the conventional spinning machine, in consideration of the tension difference for each part of the cobb, the rotation speed of the cob is maintained at a low speed of about 70% of the normal speed, and when it reaches the top, the cob is replaced by a pulley replacement or dial adjustment. The rotation speed of is converted to normal speed.

However, the conventional spinning machine as described above generates a lot of initial trimming when the speed change from low speed to constant speed, and furthermore, there is a problem in that the trimming factor due to the vertical motion of the above-described ring rail is not destroyed.

An object of the present invention is to invent the above problems, the speed increase from the winding portion to the top winding of the cobb gradually made, and to adjust the speed of the cobb in response to the vertical movement of the ring rail It is to provide an inverter system of a spinning machine that allows a constant tension to be maintained in all parts of the cob as it is to be automatically reduced or increased within the range.

Hereinafter, the configuration and operation effects of the system of the present invention will be described in detail by the accompanying drawings.

First, FIG. 2 schematically shows the operation state of the spinning machine, in which single yarns supplied from the roving 21 are guide bars 22 in the supply unit, back rollers 23 and 23 'and extension aprons in the extension unit. 24) through the recess roller 25 and the front rollers 26 and 26 'to the ring 32 which moves up and down by a snail wire 27 and a ring rail (not shown) in the winding section. Coil 20 is wound around the laid traveler 29, which is rotated by a spindle (not shown) connected to the lower portion.

Single yarn through the snail wire 27 is rotated in the same direction as the direction of rotation of the spindle while drawing a curve between the snail wire 27 and the traveler 29 by the centrifugal force of the cob 20, these It is called a ballooning phenomenon.

The antinode ring 28 and diaphragm 31 serve to prevent the width of the sagging from becoming too large, and the width of the sagging is proportional to the square of the velocity of the cob 20 and inversely proportional to the tension. In the spinning process, about 60% of the total trimming occurs due to the change in tension due to the rotation of the corps 20, the width of the droop, the linear velocity of the traveler 29, and the like. It is to effectively prevent envoys in the same authority.

1 is a diagram illustrating the configuration of a system of the present invention, which includes a main computer 1 which performs input data processing together with a control function of the entire system, and a position sensor 9 which detects a vertical movement state of a ring rail in a spinning machine. ), The operator outputs the output signal from the drive panel unit 6, the drive panel unit 6, and the sensor 9 for inputting data on a work order, the number of stages and the number of years, and the machine station. A programmable logic controller 5 connected to 1), thereby outputting an inverter control signal, and an inverter 10 for shifting the rotational speed of the cobb in the spinning machine according to the control signal of the controller 5; A display unit 7 connected to the control unit 5 for displaying input data through the driving panel unit 6 and the state of the doping signal and the doping preliminary signal output from the spinning machine, and the main computer 1 Various data connected to It consists of key boards (2), CRT (4) and the printer (3) for the input query, and output.

In the system of the present invention configured as described above, the main computer 1, which is a system controller, analyzes the production status, the machine status status, and all the contents of the work, and the details of the work conditions and work orders through the drive panel unit 6. Data for is input to this host computer (1).

Correction and redirection of the operation status and abnormal operation are input through the key board 2 connected to the main computer 1, and the CRT 4 and the printer 3 are used for output of the overall data. The position sensor 9 is a microsensor for detecting the vertical movement of the ring rail in the square machine 11, and is installed at the A and B points of the ring cam for vertically moving the ring rail as shown in FIG.

When the point A is detected by the position sensor 9, the ring rail is lowered, thereby shortening the width of the single yarn sagging, thereby reducing the tension. Accordingly, it is preferable to gradually increase the rotation speed of the cobb.

On the contrary, when the point B is detected by the position sensor 9, the ring rail is raised and the tension is relatively large, so that the rotation speed of the cobb is controlled to be gradually lowered.

The detection signal of the position sensor 9 is input to the control unit 5 through the I / O block 8, and accordingly, the control unit 5 again performs the above-described ring rail through the I / O block 8. By outputting the inverter control signal corresponding to the vertical movement to the inverter 10 to control the rotation speed of the cobb.

In practice, since the tension difference between the rising and falling sections of the ring rail is about 15%, the inverter 10 is controlled so that the rotational speed of the cobb is also changed by ± 7.5% from the reference speed.

FIG. 4a is a graph illustrating a two-stage speed conversion state of the conventional spinning machine as described above. As a result, a sudden speed change is made from one stage to two stages, and many initial trimmings have been generated.

4b shows the speed change state of the spinning machine according to the system of the present invention. The speed increase from the initial winding to the normal winding of the cobb is gradually made, and the cobb's rotational speed is predetermined in response to the vertical movement of the ring rail. A traverse speed change is achieved which is reduced or increased within the range.

The speed change from the ultra winding to the normal winding and the traverse speed conversion according to the vertical motion of the ring rail are performed by the controller 5. On the other hand, when the winding of the Cobb is completed or the winding is made to the dop point of the Cobb while the spinning machine 11 is running, the doping signal or the doping preliminary signal, which is a replacement signal of the Cobb, is output from the spinning machine 11. Alternatively, the doping preliminary signal is input to the main computer 1, and the main computer 1 connects these signal data to the display unit 7 through the control unit 5 to indicate to the operator whether the doping machine 11 is doped. do.

5 is a flowchart of the doping signal control, and shows the doping signal control in a state in which a plurality of inverters 10 and a spinning machine 11 are arranged in parallel.

That is, if there is a spinning machine with a doping preliminary signal generated, while the doping operation is performed in one spinning machine, the machine speed of another spinning machine is automatically lowered to prevent simultaneous doping, and when the doping work of one spinning machine is completed, The doping operation of another spinning machine is started again, and the state of the doping signal is displayed to the user through the display unit 7.

As described above, the present invention gradually increases the speed of the kob from the winding portion to the normal winding, and automatically adjusts the rotational speed of the kob in response to the tension difference caused by the vertical movement of the ring rail. Since the tension is kept constant, trimming is prevented, thereby increasing the spinning productivity and quality.

Claims (3)

In the spinning machine which winds the single yarn in the cob according to the up-and-down movement of the ring rail, the main computer (1) that performs the input data together with the control of the whole system, and the up-and-down movement position of the ring rail of the spinning machine The position sensor 9 to be detected, and a drive panel portion 6 for inputting data on the work order, the number of yarns, the number of years, and the machine tip, and from the drive panel portion 6 and the sensor 9 A control unit 5 for receiving an output signal and outputting an inverter control signal, an inverter 10 for shifting the rotational speed of the cobb in the spinning machine according to the control signal of the control unit 5, and the control unit 5 A display unit 7 for displaying the input data through the driving panel unit 6 and the state of the doping signal and the doping preliminary signal output from the spinning machine, and the main computer 1 Input, inquiry and output of data Key boards (2), CRT (4) and the printer (3) inverter system of the spinning frame, characterized in that made up for. According to claim 1, The speed is increased gradually from the winding to the normal winding by the inverter control signal output of the control unit 5, the rotational speed of the cock corresponding to the vertical movement of the ring rail Inverter system of a spinning machine characterized in that the set to decrease or increase within the appropriate range. The inverter system of claim 1 or 2, wherein the speed of the cobb is set to vary in response to the tension difference according to the vertical movement of the ring rail.

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