JP3277967B2 - Spindle rotation control method and apparatus for spinning machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for increasing the maximum rotational speed (rotational speed) of a ring spinning machine in order from a low speed to a high speed in order to break in the traveler.

[0002]

2. Description of the Related Art The above-mentioned technology is applied to a recent ultra high-speed spinning machine (the maximum spindle speed during normal spinning is 18,000 to 200).
Various types have been proposed. For example, in Japanese Patent Application Laid-Open No. 3-104935, a plurality of spindle shift patterns from the start to the stop of spinning of a spinning machine are set and stored with different maximum spindle rotations, and spinning is performed from this shift pattern. A plurality of shift patterns are selected according to conditions and the like, and the output order and the number of repetitions are stored. During the break-in operation, the spindle rotation is controlled in the stored order, and the maximum number of rotations of the spindle is gradually increased at each doffing. There is something.

[0003]

In the above-described apparatus, since speed data from the start of spinning to the stop of spinning is set for each of a plurality of speed change patterns, there is a problem that the setting is troublesome.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to set a normal operation pattern in a normal spinning operation of a spinning machine so as to eliminate the work of setting speed data of a speed change pattern used for a break-in operation. When the production speed corresponding to each of the division points obtained by dividing the speed-up region after startup in the normal operation pattern into a plurality of parts is set, the speed level in the normal operation pattern corresponding to each division point is set to the highest speed so as to head toward the deceleration region. The spindle is rotated in accordance with the running-in operation pattern, and the spindle maximum rotation during the running-in operation is gradually increased from a low speed.

[0005]

According to the present invention, when the normal operation pattern is set, and during the break-in operation, the production amount corresponding to each of the division points obtained by dividing the speed-up region of the normal operation pattern into a plurality of parts, the normal operation pattern corresponding to the production amount is obtained. Since the speed level in the operation pattern of the speed-up region during operation is set to the highest speed and heading toward the deceleration region, and the spindle maximum rotation during the break-in operation is gradually increased, the speed data of the normal operation pattern is A running-in operation pattern can be automatically generated from the system, speed data of the running-in operation pattern need not be set, the speed data setting operation is reduced, and the running-in rotation of the traveler can be executed.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a large number of spindles 1 are arranged at equal pitches on a machine base, and a spun yarn 4 sent from a front roller 3 is wound on a bobbin 2 inserted into the spindle 1 while being heated by a traveler 22. It is made to be taken. The figure shows the spun yarn 4 in a fully-filled state in which the bobbin 2 is fully wound. A pulley 6 is wedge-fitted to a drive motor 5 for driving the spindle 1, and is disposed corresponding to the belt 8 wound around the pulley 6 and a pulley 7 for driving the chin pulley shaft 9 a and the spindle 1. The spindle 1 is driven to rotate via a spindle driving belt 10 wound around the chin pulley 9 thus wound. The drive motor 5 functions as a variable speed motor with an inverter 12 shown as a motor control unit.
The speed command output signal of the control device 11 is input via the input / output interface 18 and the digital / analog converter 19. The drive motor 5
The draft portion including the front roller 3 is also driven to rotate via another driving mechanism.

The control unit 11 includes a central processing unit 13 and
A program memory 14 consisting of a read-only memory (ROM) storing a control program and the like according to a flowchart (FIG. 3) described later, and a calculation processing result in the central processing unit 13 and speed data input from the keyboard 16 are stored. Readable and rewritable memory (RA
M). From the keyboard 16 as an input means, the production amount at each of the shift start points Na, the speed-up area end point Nb, the deceleration area start point Nc, and the full-pipe stop point (deceleration area end point) Nd in the normal operation pattern Q0 shown in FIG. (0, Sb, Sc, Sd) and the spindle rotation speeds na to nd at that time are input, the break-in division number n for dividing the speed-up region T1, and the break-in operation pattern immediately before the normal operation pattern Q0 (here, The number of repetitions K of the pattern Q8) is input. Further, the doffing completion signal from the operation completion detection device 20 of the doffing device 21 attached to the machine base is input to the control device 13, and the production amount from the production amount detector 17 connected to the front roller 3 is input to the control device 13. Information (spin length) is input.

Next, the operation will be described with reference to the control flowchart shown in FIG. Each step of the flowchart acts as a function realizing means. Generally, the drive motor 5
However, the rise time to reach the initial speed of the normal operation speed is
Rise in seconds according to a preset acceleration gradient,
In addition, since the time until the spindle rotation stops after the vessel is fully filled is extremely short according to a predetermined deceleration gradient, these times have almost no effect on the production amount, and it can be considered that the spindle rotation becomes the initial speed immediately after the start. Therefore, in step SS1, the start start point Na and the speed-up end point N of the normal operation pattern Q0 shown in FIG.
b, input the production speed at the deceleration area start point Nc and the deceleration area end point (full stop point) Nd and the spindle speed as speed data.

Next, in step SS2, the number of break-in divisions n (= 9, of course, may be finer) for dividing the speed-up region T1 into a plurality of division points, and the last of the break-in operation patterns The repetition speed K of the pattern (here, the pattern Q8) is set, and the initial value of the control coefficient i for gradually increasing the maximum spindle speed from the low speed during the running-in operation is set to "1". . In step SS3, these speed data, set values and the like are stored in the operation memory 15. In this state, the operation of the machine is started by the start push button, and it is determined in step SS4 whether or not the break-in operation is performed by turning on and off a break-in operation instruction button (not shown).

If it is not the break-in operation, step SS
At 5, the shift control according to the normal operation pattern Q0 is performed. That is, each of the shift points Na to
Using the data of Nd, the gradient θ (increase in the number of revolutions per minute) of a straight line connecting the adjacent shift points is calculated, and the gradient θ and the spinning inputted from the production amount detector 17 are calculated. Each time the spinning length increases by a fixed length from the length X, the spindle speed nx at that time is calculated, and a speed command is output to the inverter 12 so as to reach the calculated spindle speed nx, and the shift point Na, Nb, Nc, and Nd are interpolated between the points, and the spindle 2 is connected in the normal operation pattern Q0 connecting these points.
Is rotated to stop full filling in step SS6.

If it is determined in step SS4 that the running-in operation has been performed, the speed-up region T is determined by the running-in division number n (here, n = 9).
1 and the production amounts S1 to S8 at the division points P1 to P8
Until S8, the operation is performed according to the normal operation pattern Q0 (steps SS7 and SS8), and when the production amounts S1 to S8 corresponding to the division points P1 to P8 are reached, the speed gradient is set to zero (step SS9). When the spindle rotation levels (speed levels) n1 to n8 on the normal operation pattern Q0 corresponding to P1 to P8 are maintained, and the start point of the speed range T2, that is, the output Sc of the deceleration start point Nc (Step SS10), is reached. Speed levels n1 to n8, production Sc
By calculating the deceleration gradient from the production amount Sd and the rotation speed nd at the end point, outputting a deceleration command in accordance with the deceleration gradient and stopping the full filling (steps SS11 and SS12), the initial running-in The spindle rotation is controlled in the break-in operation pattern Q1 connecting (Na, P1, P1 ′, Nd), and the doffing is performed after the full-fill stop (step SS12,
SS17) At the second time, control coefficient i is set to step SS13.
The spindle rotation is controlled by the break-in operation pattern Q2 connecting the points (Na, P2, P2 ', Nd) by moving up by "1", and the maximum speed of the spindle rotation is reduced every time the doffing is performed until the break-in operation patterns Q3, Q4,. The running-in operation is sequentially carried out, and the control coefficient i is controlled in steps SS14 and SS15 to repeat the last running-in operation (here, pattern Q8) K times, which is stored in advance, and the pattern Q8 in step SS16. Is counted, and when the number of repetitions reaches the set value K,
The running-in command is released and the normal operation is determined in step SS4, and the process proceeds to step SS5 to shift to the normal operation pattern Q0.

Next, in FIG. 4, a plurality of shift points R
a to Rd are set and input in advance, and the shift points Re to Rd
Shows a case where is divided by a plurality of division points. The division is finer between points Rc and Rd than points Rb and Rc. In this case, the normal operation pattern Q0 is, as in the first embodiment, a speed gradient determined from the production amount (0, Sb to Sf) and the spindle speed (na to nf) between the adjacent shift points and the spinning at that time. Shift point (Ra, Rb, Rc, Rd, R
e, Rf), the spindle speed is obtained by interpolation, and the result is output to the inverter 12 to control the spindle speed. Also, at the time of break-in operation, the split point (shift point R
(including b and Rc), the vehicle is directed to the deceleration range T2 at the speed level in the normal operation pattern Q0 corresponding to the division point and to the transmission point Rf according to the deceleration gradient determined by the transmission points Re and Rf. In this way, the running-in operation pattern sequentially increases in speed from the patterns Q1 to Q9.

Further, in FIG. 5, the speed-up region T1 in the normal operation pattern Q0 is finely divided, and each division point is a speed change point Rb to Rl. When the production amount reaches the point Rb, the spindle rotation at the point Rb is maintained to move toward the deceleration range T2, and the same control is performed the second time when the point Rc is reached. Patterns Q1 to Q1
The maximum rotation of 1 gradually shifts from a low speed to a high speed.

In the above-described embodiment, the break-in operation pattern is generated one by one each time the doffing is performed. Therefore, there is an advantage that the operation can be performed with a small memory capacity. May be automatically generated and stored in memory, and the data may be sequentially read out at a low speed during the break-in operation.

[0015]

As described above, according to the method of the present invention, the running-in operation pattern is automatically generated using the speed data of the normal operation pattern. Therefore, it is not necessary to set the speed-in data of the running-in operation pattern. The running-in rotation of the traveler can be performed with less effort.

[Brief description of the drawings]

FIG. 1 is a diagram showing a spindle rotation drive system according to a first embodiment of the present invention.

FIG. 2 is a velocity diagram illustrating spindle drive control in FIG. 1;

FIG. 3 is a control flowchart for realizing the speed control of FIG. 2;

FIG. 4 is another embodiment of the spindle drive control.

FIG. 5 shows still another embodiment of the spindle drive control.

[Explanation of symbols]

1 spindle, 5 drive motor (variable speed motor),
11 control device, 12 inverter (motor control device), 15 operation memory (storage means), Q0 normal operation pattern, Q1 to Q8 break-in operation pattern, P1
~ P8 Division point, S1 ~ S8 Production, n1 ~ n8
Spindle speed (speed level)

Claims (2)

(57) [Claims] 1. A method for operating a spinning machine in which, after exchanging a traveler, the maximum spinning speed of the spindle is gradually increased from a low speed and sequentially shifted to a high speed, a normal operation pattern in a normal spinning operation of the spinning machine is set and a break-in is performed. At the time of operation, when the production speed corresponding to each division point obtained by dividing the speed-up region after startup in the normal operation pattern into a plurality of parts is reached, the speed level in the normal operation pattern corresponding to each division point is set to the highest speed, and the operation proceeds to the deceleration region. A spindle rotation control method for a spinning machine, characterized in that the spindle is rotated in the above-mentioned running-in pattern and the maximum rotation of the spindle during the running-in is gradually increased from a low speed. 2. A variable speed motor for driving a spindle, a motor control unit for controlling the variable speed motor, an input means for setting a normal operation pattern between start and stop of the machine during normal spinning, and the normal operation thereof The storage means for storing the pattern, and during the break-in operation, when the production amount corresponding to each division point obtained by dividing the speed-up region in the normal operation pattern into a plurality of parts, the speed level in the normal operation pattern corresponding to each division point is changed. A spinning machine that outputs speed data of a break-in operation pattern in which the speed is set to the deceleration range as the highest speed, and outputs the speed data to the motor control unit in ascending order of the break-in operation pattern with the highest spindle rotation. Spindle rotation control device.