JPH10249918A - Apparatus and method for controlling outer diameter of extrusion line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To guide an extruder and a haul-off unit to a desired haul-off speed and target outer diameter in a short time at the time of accelerating or decelerating an extrusion line by calculating a new extrusion speed to an input haul-off speed from a difference of actual extrusion speed data, input extrusion speed and target outer diameter and actual work outer diameter data. SOLUTION: An extrusion speed detector 12 and haul-off speed detector 12 respectively detect a rotary speed of an extrusion motor 11 and a rotary speed of a haul-off motor, and give actual outer diameter data D and actual extrusion speed data Ve to the actual haul-off speed data Vt at one or more points to a controller CPU. The controller CPU communicates information of an updatable memory M for storing input haul-off speed Vpn, target outer diameter Do, input extrusion speed Vepn from digital switches 50, 60 via a data bus, and the speed Vepn stored in the memory M is rewritten and updated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer diameter control device used for an extrusion line such as an electric wire covering line, and more particularly, to an extrusion control device for extruding a line to a steady operation state when the line speed is accelerated or decelerated such as when the line is started or lowered. The present invention relates to an outer diameter control device for guiding a line and an outer diameter control method.

[0002]

2. Description of the Related Art Generally, in an extrusion line such as an electric wire coating line, in order to control an outer diameter of a work, that is, an outer diameter of a coating, a speed ratio (Ve / Vt) between a take-up speed Vt and an extrusion speed Ve.
= Kπ (D2-d2) / 4) to obtain the extrusion speed Ve, or the deviation ΔD between the set outer diameter D and the measured outer diameter Do.
The required set outer diameter D is obtained by the PI control according to.

[0003] By the way, PI control provides relatively good results when the line speed is constant, but when the line speed changes, such as when starting up an extrusion line, the line speed is accelerated or decelerated. If the control is likely to be unstable and the outer diameter deviation ΔD is large, the response speed is slow, and the product yield is poor. In the case of the above-described speed ratio control, the speed ratio control required to finish the same outer diameter is caused by the combination of the extruder and the take-off machine due to the non-linearity of the extrusion speed and the extrusion amount of the extruder. Different characteristics and line speeds will naturally yield different results.

Attention has been paid to this point, and conventionally,
Japanese Patent Application Publication No. 177810 discloses a control method that focuses on the constant K. In other words, in this outer diameter control,
The outer diameter is controlled by correcting the constant K. However, since this outer diameter control method is an outer diameter control with a primary focus on keeping the line speed constant, when starting up when the line speed changes, The control in a state where the line speed is not effective and the line speed changes every moment is superior to the conventional type, but has many problems in practical use. As the outer diameter control when the line speed is variable, there is a control device proposed in Japanese Patent Application Laid-Open No. 5-321369. That is, this control device is used at the time of acceleration of the line speed (at the time of start-up). Compared with the control method proposed in the above-mentioned Japanese Patent Application Laid-Open No. Sho 62-177810, the control device is used when the line speed changes. It is considered that the range of application is wide in terms of controlling the outer diameter,
Also at the center is the above-described relational expression of the speed ratio.

[0005]

However, if this relational expression of the speed ratio is used in a state where the line speed changes, an error may occur. In other words, the speed ratio corresponding to the set outer diameter at the current line speed may not be established at the next moment because the distance between the outer diameter measurement position and the extruder is large. Even if the outer diameter is within the allowable range, the surface condition is inferior to that of a manually started up. In addition, even with this control device, the relational expression of the cross-sectional area control is not strictly established in the line where the line speed is variable, and the outside diameter measurement position and the extruder are far from each other. There is a problem with the start-up speed due to the delay in the diameter and the fact that the characteristics of the actually combined extruder and take-off machine differ depending on the extrusion line.

An object of the present invention is to provide a desired take-up speed and a target outer diameter in a short time when the extrusion line is accelerated or decelerated in view of the current state of the conventional outer diameter control device and outer diameter control method as described above. An object of the present invention is to provide an outer diameter control device and an outer diameter control method that can guide an extruder and a take-off machine and that can learn the characteristics of an applied extrusion line during the guidance.

[0007]

According to the present invention, the object is to achieve the following: 1) an extruder for supplying an extruded material of an extruding line, a take-off machine for picking up a work after extrusion, and detecting an outer diameter of the work. An outer diameter detector to be driven, the pulling motor of the pulling machine is driven so that the pulling speed of the pulling machine is accelerated or decelerated to a set final speed, and the workpiece outer diameter obtained in the extrusion line is the target outer diameter. And a controller for controlling an extrusion speed of the extruder by driving an extrusion motor of the extruder. An input device capable of inputting an input extrusion speed with respect to any one or more input take-up speeds as a control characteristic; and an input device for detecting a rotation speed of an extrusion motor of the extruder and a rotation speed of the take-up motor.
Extrusion speed detector and take-off speed detector that provide the actual work outer diameter data and actual extrusion speed data for the actual take-up speed data above the point to the controller, the input target outer diameter from the input device, each input take-up speed and Updatable memory that stores the input extrusion speed, and controls the drawer and the extruder with built-in control characteristics, and the actual extrusion speed data at the input take-up speed or the input extrusion speed, the target outer diameter, and the actual work outer diameter data. A controller for calculating a new extrusion speed for the input take-up speed from the difference and rewriting the input extrusion speed in the memory to a new extrusion speed; and An extruder for supplying a material, a take-off machine for taking out a work after extrusion, an outer diameter detector for detecting an outer diameter of the work, and a take-up mode of the take-up machine. The extruder is driven by accelerating and decelerating the take-up speed of the take-up machine to a set final speed by driving the extruder so that the workpiece outer diameter obtained in the extrusion line becomes a target outer diameter. And a controller for controlling the extrusion speed of the extrusion line, wherein the input extrusion for any one or more input take-up speeds at the time of line speed acceleration / deceleration other than the target outer diameter, take-up acceleration and the set final speed is provided. Step 1 of inputting and storing a speed as a control characteristic, and driving the take-off machine at the input take-up speed and driving the extruder at the input extrusion speed to obtain actual take-up speed data, actual extrusion speed data, and actual work outer diameter data. Step 2, measuring the actual take-up speed data and the set take-up acceleration, and calculating a take-up speed command to the take-up machine. Determining whether the degree command has reached the input take-off speed, and when the actual take-up speed data reaches the same input take-up speed, the actual extrusion speed data or the input extrusion speed and the target outer diameter and the actual work outer diameter data (4) updating the input extrusion speed with a new extrusion speed corresponding to the input take-up speed calculated from the difference between the input take-up speed and determining whether or not the actual take-up speed data of the take-up machine has reached a set final speed; When the actual take-off speed data of the machine reaches the set final speed, the acceleration and deceleration of the actual take-off speed data of the take-off machine are terminated, and the actual take-off speed data of the take-off machine is held at the set final speed; When the actual take-up speed data does not reach the set final speed, the take-up speed command calculated in the step and the extrusion speed command to the extruder suitable for the target outer diameter are stored. Step 8 for calculating from the control characteristics, the step 9 for correcting the extruding speed command so that the outer diameter deviation between the actual work outer diameter data and the target outer diameter becomes zero, and the hauling motor of the hauling machine based on the hauling speed command. And a step 10 of driving the extrusion motor of the extruder by the extrusion speed command and returning to the step 2.

[0008] The object of the present invention is to provide an extruder for supplying an extruded material of an extruding line, a take-off machine for taking out a work after extrusion, and an outer diameter detection for detecting the outer diameter of the work. The extruder is driven so that the take-up speed of the take-up machine is accelerated or decelerated to a set final speed by driving a take-up motor of the take-up machine and a work outer diameter obtained in the extrusion line has a target outer diameter. A controller for driving a motor to control the extrusion speed of the extruder; an external diameter control device for the extrusion line, wherein an arbitrary point at the time of line speed acceleration / deceleration other than the target external diameter, the take-up acceleration and the set final speed. An input device capable of inputting an input extrusion speed with respect to the above-described input take-up speed as a control characteristic, an input memory capable of storing the input take-up speed, an input target outer diameter, and an input extrusion speed from the input device; Controlling the drawer and the extruder with the input take-up speed and the input push-out speed from the input device, and using the built-in control characteristics, the actual extrusion speed data at the input take-up speed and the input extrusion speed and the target outer diameter. The controller which calculates a new extrusion speed for the input take-up speed from the difference from the actual workpiece outer diameter data obtained from the outer diameter detector and rewrites the input extrusion speed in the memory to a new extrusion speed. 4) an extruder for supplying the extruded material of the extruder line, a take-off machine for picking up the extruded work, an outer diameter detector for detecting the outer diameter of the work, and the take-up machine And drives the pulling motor of the extruder so that the pulling speed of the pulling machine is accelerated or decelerated to the set final speed and the outer diameter of the work obtained in the extrusion line becomes the target outer diameter. In the outer diameter control device of the extrusion line comprising a controller that controls the extrusion speed of the extruder by moving, the target outer diameter, the take-up acceleration and any one or more points at the time of line speed acceleration / deceleration other than the set final speed. Inputting and storing the input extrusion speed with respect to the input extraction speed as a control characteristic, and driving the extruder at the input extraction speed and the extruder at the input extrusion speed to measure the actual workpiece outer diameter data. 2, a step 3 of calculating a new take-up speed to the take-up machine from the take-up speed and the set take-up acceleration, and judging whether or not a take-up speed command of the take-up machine has reached the input take-up speed. When the actual pulling speed data reaches the input pulling speed, the actual extrusion speed data or the input extrusion speed and the input calculated from the difference between the target outer diameter and the actual workpiece outer diameter data are input. Updating the input extrusion speed with a new extrusion speed for the take-off speed; and judging whether the take-off speed of the take-off device has reached a set final speed, and setting the take-off speed of the take-off device to the set final speed. Steps 6 and 7 for terminating acceleration / deceleration of the take-off speed of the take-off machine when the speed has reached and maintaining the take-off speed of the take-off machine at the set final speed. Step 8 of calculating from the take-off speed calculated in the above and the control characteristic stored in the extrusion speed command to the extruder suitable for the target outer diameter, and the outer diameter of the actual work outer diameter data and the target outer diameter. Step 9 of obtaining a corrected extrusion speed for reducing the deviation to 0, and driving the take-out motor of the take-up machine at the new take-up speed command, and driving the extrusion motor of the extruder at the new extrusion speed, and returning to the step 2. And step 10, is also achieved by the outer diameter control method of extrusion line equipped with.

In the following description of a preferred embodiment of the present invention, an outer diameter control device for controlling an extruder and a take-off machine in a steady state of the extrusion line solves the problem of acceleration and deceleration of the extrusion line. Although the control device and the outer diameter control method are exemplified, the outer diameter control device and the outer diameter control method are an extrusion line starter and an extrusion line starter designed only for the purpose of accelerating and decelerating the line speed of the extrusion line. The raising method may be used.

[0010]

Since the outer diameter control device and the outer diameter control method according to the present invention have such a configuration, each time the line speed changes, the above-described control operation is repeated. The value of the extrusion speed for obtaining the set outer diameter gradually approaches the characteristic value peculiar to the extrusion line, and the learning result makes it possible to finish the same work every time in the direction of reducing the error.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show a first embodiment of the present invention applied to an electric wire coating line. As shown in FIG. 1, the electric wire coating line (extrusion line) coats a core wire 1 with an insulating coating 1a (extruded material). An extruder 2 for performing the process, an outer diameter detector 4 for measuring the outer diameter of the insulating coating 1a after the insulating coating 1a is solidified in a water bath (not shown), and a take-off device 3 for picking up a completed coated electric wire (work). It is composed of

The extrusion motor 11 of the extruder 2 is connected to the pulling motor 2 of the pulling machine 3 via a speed control unit 13.
1 is speed-controlled by a command from the controller CPU of the outer diameter control device of the present invention via the speed control unit 23,
An output signal from the outer diameter detector 4 is input to the controller CPU via the conversion unit 41. In other words, the controller CPU of the outer diameter control device, in the normal steady operation (constant line speed), monitors the outer diameter of the insulation coating by the outer diameter detector 4 and sets the take-up motor 22 of the take-up machine 3 at the set final speed Vte.
Is driven and the extrusion motor 1 is controlled by a known outer diameter ratio control or PI control.
1 is controlled.

The outer diameter control device of the present invention drives the take-off motor 21 of the take-up machine 3 under the control of the controller CPU during acceleration / deceleration control of the electric wire covering line, thereby taking out the take-up machine 3. The extrusion motor 11 of the extruder 2 is driven so that the speed Vt is accelerated / decelerated to the set final speed Vte and the outer diameter D (work outer diameter) of the covered electric wire obtained in the electric wire covering line becomes the target outer diameter Do. , For this purpose,
The outer diameter control device includes digital switches 50 and 60 (input devices), and an extrusion speed detector 12 and a take-up speed detector 22 that can detect the rotation speed of the extrusion motor 11 and the take-up motor 21, respectively. Have.

That is, these digital switches 50, 6
From 0, the input pushing speed Vepn with respect to the input take-up speed Vpn at any one or more points at the time of line speed acceleration / deceleration other than the set final speed Vte is transmitted to the controller CPU.
, And the target outer diameter Do can be input as control characteristics. The extrusion speed detector 12 and the take-off speed detector 22 include:
The speed control unit 13 and the speed control unit 2
Output signals to the extrusion motor 11 and the take-off motor 21 at the speed specified by the controller CPU.
Speed of the motor.

The extrusion speed detector 12 and the take-up speed detector 22 detect the rotation speed of the extrusion motor 11 and the rotation speed of the take-up motor, respectively, and determine the actual outer diameter data for one or more actual take-up speed data Vt. D and the actual extrusion speed data Ve are given to the controller CPU.

Then, the controller CPU stores information in the renewable memory M for storing the input take-up speed Vpn, the target outer diameter Do, and the input push-out speed Vepn from the digital switches 50 and 60 via the data bus. The input extrusion speed Vepn stored in the memory M is transmitted and received.
Is rewritten and updated in a procedure described later. The controller CPU controls the drawer 3 and the extruder 2 with the input take-up speed Vpn and the input push-out speed Vepn, and uses the built-in control characteristics to control the actual extrusion speed data Ve or the input extrusion speed at the input take-up speed Vpn. Speed Vepn and target outer diameter D
A new extrusion speed Vec with respect to the input take-off speed Vpn is calculated from the difference between o and the actual covered wire outer diameter D, and the input extrusion speed Vepn in the memory M is rewritten to the new extrusion speed Vec.

Next, the actual control operation at the time of line speed acceleration / deceleration in the above-described electric wire covering line will be described with reference to the flowchart of FIG. First, in step S1, the input push-out speed Vepn, the target outer diameter Do, and the take-up acceleration At with respect to the input take-up speed Vpn at any one or more points during line speed acceleration / deceleration other than the set final speed Vte are set by the digital switch 50. The input take-up speed Vpn, the input push-out speed Vepn, the target outer diameter Do, and the take-up acceleration At are stored in the memory M. That is, in step S1, the relationship between the line speed Vt and the actual extrusion speed Ve that the extrusion line has and has a desired outer diameter is input and stored, and these data are used as the dynamic characteristics of the extrusion line described later. Is used to calculate the extrusion speed command Ve 'based on

Next, in step S2, the controller C
PU drives the take-off machine 3 at the input take-off speed Vpn and the extruder at the input extruder speed Vepn,
In this step, the actual take-off speed data Vt, the actual push-out speed data Ve, and the actual covered wire outer diameter data D are called into the controller CPU from the extrusion speed detector 12, the take-off speed detector 22, and the outer diameter measuring device 4.

Thereafter, the controller CPU calculates a take-up speed command Vt 'to the take-up machine 3 from the actual take-up speed data Vt and the set take-up acceleration At (step S3). That is, in this step S3, the actual take-up speed data Vt of the take-up machine 3 after a predetermined time is calculated with the preset take-up acceleration At, and a take-up speed command Vt 'is generated. The take-up speed command Vt 'is obtained by correcting the actual take-up speed data Vt after the lapse of a predetermined time by the take-up acceleration At.

Next, at step S4, it is determined whether or not the actual take-off speed data Vt has reached the input take-up speed Vpn. If the actual take-up speed data Vt has reached the input take-up speed Vpn, the process proceeds to step S4. , The actual extrusion speed data Ve or the input extrusion speed Vep, and the new extrusion speed Vec (S) calculated from the actual workpiece outer diameter D and the target outer diameter Do.
In step 5), the input extrusion speed Vepn is updated (step S).
6). In steps S4, S5, and S6, the input dynamic characteristics are brought closer to the original characteristics of the extrusion line, so that the next outer diameter control is further stabilized.

After step S6, the controller CPU
Determines whether the actual hauling speed data Vt of the hauling machine 3 has reached the set final speed Vte (step S7), and when the actual hauling speed data Vt of the hauling machine 3 has reached the set final speed Vte, Acceleration / deceleration of the actual take-off speed data Vt of the machine 3 is terminated, and the actual take-off speed data V
t is held at the set final speed Vte (step S8). In this case, the controller CPU rewrites the take-up speed command Vt 'of the take-up machine 3 at the set final speed Vte and, at the same time, controls the speed change of the take-up machine 3 with the rewritten take-up speed command Vt', thereby obtaining a steady state (line speed). Enter the general outer diameter control state of (constant).

In this case, if the actual take-up speed data Vt has not reached the set final speed Vte, the program proceeds to step S
9 and the controller CPU proceeds to step S3.
From the take-off speed command Vt 'calculated in step (1) and the stored control characteristics, an extrusion speed command Ve' to the extruder 2 suitable for the target outer diameter Do is calculated. That is, this step S9
In, based on the stored dynamic characteristics of the extrusion line, the actual extrusion speed data Ve required at the time of the actual take-off speed data Vt (= extrusion speed command Vt ') after a predetermined time is calculated, and the calculation result is used as the extrusion speed. Command Ve '.

In the next step S10, the controller C
The PU corrects the extrusion speed command Ve ′ so that the outer diameter deviation ΔD between the actual outer diameter data D of the covered wire and the target outer diameter Do becomes zero, but this correction ensures that the outer diameter deviation ΔD becomes zero. Heading.

Thereafter, in step S11, the pulling motor 22 of the pulling machine 3 is driven by the pulling speed command Vt ', and the extrusion motor 11 of the extruder 2 is driven by the pushing speed command Ve'. Return.

In the above-described repeated steps from step S2 to step 11, it is determined whether or not the actual take-up speed data Vt has reached the desired set final speed Vte. Is terminated, and the actual take-off speed data Vt is held at the set final speed Vte. If the actual take-off speed data Vt has not reached the set final speed Vte, each step is repeated except for inputting dynamic characteristics. In the steps described above, the above-described operation is repeated every time the line speed changes. Therefore, the value of the extrusion speed for obtaining the target outer diameter at the line speed point that stores the characteristics of the extrusion line is determined by the extrusion line Can be finished each time in the direction in which the characteristic value approaches the intrinsic characteristic value and the error is reduced.

FIG. 3 shows an outer diameter control device according to a second embodiment of the present invention. The outer diameter control device includes an extruder 2 and a take-off machine 3.
Is provided. The controller CPU controls the extruder 2 via the speed control unit 13.
The pulling motor 3 is controlled through the extrusion motor 11 and the speed control unit 23. During the control operation, the output signal from the outer diameter detector 4 is converted by the conversion unit 41.
Is input to the controller CPU via the.

That is, as in the case of the first embodiment, the second
The controller CPU of the outside diameter control device according to the embodiment operates the take-off motor of the take-off machine 3 at the set final speed Vte under the monitoring of the outside diameter of the insulation coating by the outside diameter detector 4 in the normal steady operation (constant line speed). 22 by controlling the outside diameter ratio control and PI
The rotation speed of the extrusion motor 11 is controlled by the control. The outer diameter control device according to the second embodiment includes digital switches 50 and 60 (input devices) for controlling the acceleration and deceleration of the electric wire coating line, the rotation speed of the extrusion motor 11 and the rotation speed of the take-off motor 21. It has an extruder speed detector 12 and a take-up speed detector 22 which can be respectively detected. The extrusion motor 11 and the take-off motor 21 are locally controlled by the speed control unit 13 and the speed control unit 23.

That is, in the outer diameter control device according to the second embodiment, the extrusion speed detector 12 and the take-up speed detector 22
Is not input to the controller CPU, that is, assuming that the actual speed data Vt = the speed command Vt 'and the actual speed data Ve = the speed command Ve', the acceleration / deceleration control of the wire coating line is performed. Only in the point, it differs from the outer diameter control device according to the first embodiment. The reason for this is that in the extrusion line, there is almost no delay between the actual extrusion speed data Ve and the extrusion speed command Ve 'and the actual take-up speed data Vt and the take-up speed command Vt' described in the first embodiment.

Next, the control operation of the outer diameter control device according to the second embodiment will be described with reference to the flowcharts shown in FIGS. The flowcharts shown in FIGS. 4 and 5 show a case where the extrusion line is started up from a stopped state to the set final speed Vte. Note that n in the flowchart
Vpn and Vepn, where “n” indicates the number of the set characteristic data (n = 1, 2, 3,...), And Vpn is the input characteristic N
o. = n is the line speed, and Vepn is the actual extrusion speed data V suitable for setting the set outer diameter Do when the input characteristic No. = n.
e. The following description is based on the assumption that the take-up machine 3 and the extrusion line are not affected by slip or the like, and that actual take-up speed data Vt = line speed Vt.

First, the relationship between the take-up speed of the take-off machine 3 and the extrusion speed of the extruder 2 (control characteristic), which becomes the target outer diameter Do.
Is input before the “START”, so that it is omitted in the flowchart. That is, although the input method and the storage method are not limited, in the second embodiment, the final pickup speed Vte is set to 100%.
10% line speed (0.1 Vte, 0.2 Vt
e, 0.3 Vte, 0.4 Vte, 0.5 Vte, 0.6 Vt
e, 0.7 Vte, 0.8 Vte, 0.9 Vte, Vte) (extruding speeds Vep1, Vep2, Vep3, Vep4,
Vep5, Vep6, Vep7, Vep8, Vep9, Vep10)
Is set by the digital switches 50 and 60, and the memory M
Was memorized. When n = 1, in this embodiment, V
pn indicates a line speed of 0.1 Vte, and Vepn indicates a line speed of 0.1 Vte.
Set outer diameter Do at 1 Vte (Vte is the set final take-up speed)
The actual extrusion speed data Ve suitable for making Similarly, when n = 2, it indicates a line speed of 0.2 Vte, and Vpn = O. 2Vte. Also, n =
In the case of 0, the initial values are the line speeds Vt = 0 and Vpn = 0.

In this case, the number of input points is preferably as large as possible, but from the viewpoint of the storage step and cost,
About 10 points are suitable. As a method of inputting the dynamic characteristics, a method of storing a test operation of the wire-covered line when the line speed changes may be stored. FIG.
And "n" shown in the flowchart of FIG.
Indicates the characteristic data No., and also indicates the corresponding range No. (Vep n-1 ≦ Vt ′ <Vep n) of the extrusion speed command Vt ′.

First, in step A1, n = 1, and in step B6, n = 1 + 1.
o. = n input data is read by the controller CPU, and the controller CPU causes the take-off machine 3 to operate at the line speed Vt corresponding to the input data of the input data No. n and the extrusion speed Ve corresponding to the input extrusion speed Ven. The extruder 2 is operated.

Next, the process proceeds to steps A2 and B1, where the actual take-off speed data Vt, the actual extrusion speed data Ve, and the actual covered wire outer diameter data D are measured. In this embodiment, as described above, The processing is performed assuming that the actual take-up speed data Vt = take-up speed command Vt 'and the actual extrusion speed data Ve = the push-out speed command Ve'.

Subsequently, a take-up speed command Vt 'is calculated from the take-up acceleration At set in the controller CPU (steps A3 and B2). That is, the take-off speed command Vt '
Since the following equation is used in the calculation of (1), the time Δt needs to be set in advance. The time Δt in this case is
It can be arbitrarily selected according to the extrusion line, but it is good to consider that if the length is too long, the effect of the present invention is weakened, and if the length is too short, the response of the speed control unit is involved. Is set to 50 ms, and as the current actual picking-up speed data Vt, the picking-up speed command Vt '= Vt + Δt · At
Was calculated. ).

Thereafter, the input characteristic value and A3 or B
An extrusion speed command Ve 'suitable for the take-up speed command Vt' calculated in step 2 is calculated (steps A4 and B9). The calculation method of the present embodiment is based on the calculated take-up speed command Vt '(Vep n-1 ≤ Vt'<Vep n). The extrusion speed command suitable for the take-up speed command Vt 'from Vep n-1 and Vepn. This is a method of calculating and calculating Ve '. For example, Vt '= 4m / sec, Vpn-1
= 1m / sec, Vpn = 5m / sec, Vepn-1 = 150rpm
, Vep n = 300 rpm, the change during that time should be continuous, so that it is considered as a linear change and ΔVep / Δ
Vp = (300-150) / (5-1) = 37.5 [rpm]
[Sec / m] and Ve ′ = Vep n−1 + ΔVep / ΔVp (Vt ′
-Vpn-1) = 150 + 37.5 (4-1) = 262.
5 [rpm]. Of course, the calculation method itself may be replaced with a calculation suitable for the extrusion line depending on the extrusion line (wire covering line) to be performed.

After that, the outside diameter deviation ΔD at the time of the actual take-off speed data Vt is corrected to the previously obtained extrusion speed command Ve ′ (step B10). Driving the extrusion line at speed,
Since the outer diameter deviation ΔD is a very small value, PI control may be performed in step B10.

Next, in steps A5 and B11, the actual pulling speed data Vt of the pulling machine 3 is calculated by the pulling speed command Vt 'of the above-described calculation result, and the actual pulling speed data Ve of the extruder 2 is calculated by the pushing speed command Ve'. Replace, take-off machine 3 at these speeds
And the extruder 2 is driven. Specifically, the take-off speed command Vt ′ and the extrusion speed command Ve ′ are input to the speed control units 23 and 13 of the take-up machine 3 and the extruder 2.

It should be noted here that in the case of a covering line such as an electric wire, if the extrusion speed is low, the covering state is intermittent and the covering is not performed over the entire circumference. Therefore,
In such a case, it is necessary to accelerate with the same acceleration until the entire circumference is covered and confirm that the coating is performed over the entire circumference, and then perform the outer diameter control according to the present invention ( Step A6). In order to satisfy this condition, the line speed may be higher than Vpn = 1 (that is, 0.1 Vte), but in this case, the line speed Vt is set to Vpn =
When it exceeds 1, n = 2 may be set. However, since such a situation is rare, in order to simplify the explanation, in the flowchart of the second embodiment, the line speed is "Vp
It is assumed that the determination of whether or not n "has been exceeded is omitted, and that the entire circumference is covered with the actual take-off speed data Vt lower than Vpn = 1. When the line speed sets the dynamic characteristics, that is, in this embodiment, 10% with the final take-up speed Vte being 100%
Line speed (0.1Vte, 0.2Vte, 0.3Vt)
e, 0.4 Vte, 0.5 Vte, 0.6 Vte, 0.7 Vt
e, 0.8 Vte, 0.9 Vte, Vte) is determined in step B3. The actual extrusion speed data Ve or the input extrusion speed Vepn and the actual extrusion speed data when the line speed reaches the line speed Vpn for which the dynamic characteristics are set are determined. A new extrusion speed Vec (step B) determined by the workpiece outer diameter D and the target outer diameter Do
In 4), the input push-out speed Vepn with respect to the input take-up speed Vpn input to the memory M is updated (step B5).

This update is performed in steps B9 and B
Since the actual extrusion speed data Ve from which the value of the outer diameter deviation can be further reduced from the extrusion speed command Ve 'set at 10 is used, the extrusion speed is updated in a direction toward an optimum value, and the number of controls is increased. The effect that the deviation of the finished outer diameter becomes smaller every time is obtained.

The above processing is repeated until the take-up speed reaches the set final speed Vte. When the take-up speed reaches the set final speed Vte, the take-up speed of the take-up machine 3 is terminated, and the take-up speed is set to the set final speed Vte. , The outer diameter control when the line speed changes is terminated, and when the take-up speed has not reached the set final speed Vte, the processing after step B9 is continued (steps B6 and B8).

In the description of the second embodiment, an example has been described in which the dynamic characteristic for a discontinuous line speed is input. However, the input dynamic characteristic may be given in the form of a function. Thus, the suitable extrusion speed command Ve 'is replaced with a calculation using a function of a given dynamic characteristic.

In each of the above-described embodiments, the case where the line speed is changed at a constant acceleration, that is, at the time of starting the extrusion line, is illustrated. However, when the acceleration is not constant, the extrusion acceleration is determined by the input characteristic value. More advanced processing may be performed at the time of finding, or the number of input points of the characteristic values may be increased. However, in the case where the acceleration of the line speed changes, in particular, a sharp change in the acceleration increases the danger that the covered electric wire may be cut or the like, and such a case is actually extremely small.

Although the above-described embodiment has exemplified the case of the outside diameter control device for controlling the take-off device and the extruder of the extrusion line even in the steady state, the present invention is specially designed as a start-up device of the extrusion line. The present invention can also be applied to the outer diameter control device provided. In each of the above-described embodiments, the outer diameter of the work is controlled by controlling the extrusion speed of the extruder 2 while controlling the take-up speed of the extractor 3. It is also possible to control the outer diameter by controlling the take-up speed of the take-up machine 3 while adjusting the speed.

[0044]

As is apparent from the above description, according to the present invention, when the extrusion line is accelerated or decelerated, the outer diameter can be controlled in accordance with the inherent control characteristics of the extrusion line. The following effects can be obtained.

1) Outer diameter control based on the characteristics of the extrusion line including the control delay can be obtained.

2) Therefore, since the outer diameter can be controlled in accordance with the capacity of the extrusion line to be applied, the maximum line speed can be varied within the capacity of the extrusion line, and the start-up time of the extrusion line can be reduced. Be shortened.

3) When the control at the constant line speed is used, when the line speed is variable, the correction amount must be corrected. However, in the present invention, the dynamics of the extrusion speed due to the change in the line speed are required. By changing the extrusion speed based on the characteristic, a control step at a constant line speed can be used as a control step for further reducing the outer diameter deviation,
After reaching the set final speed Vte, it can be used for outer diameter control under a constant line speed as it is.

4) The outer diameter control device and the outer diameter control method of the present invention can be easily applied to existing equipment because the capacity relationship between the pulling device of the extrusion line and the extruder does not matter.

5) With the outer diameter control device and the outer diameter control method of the present invention, a smooth change in the extrusion speed can be realized, so that the surface finish of the extruded material is good.

6) According to the present invention, the total loss at the time of starting the extrusion line can be reduced, so that the product cost can be reduced.

7) In the present invention, since the control state when the line speed is variable is stored in the memory, the state of the extrusion line can be easily grasped by calling the storage data.

[Brief description of the drawings]

FIG. 1 is a block diagram of an outer diameter control device according to a first embodiment of the present invention.

FIG. 2 is a control flowchart of the outer diameter control device.

FIG. 3 is a block diagram of an outer diameter control device according to a second embodiment of the present invention.

FIG. 4 is a control flowchart of a first half of the outer diameter control device.

FIG. 5 is a control flowchart of the latter half of the outer diameter control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Core wire 1a Insulated wire 2 Extruder 3 Puller 4 Outer diameter measuring device 11 Extrusion motor 12 Extrusion speed detector 13,23 Speed control unit 41 Conversion unit 50,60 Digital switch CPU controller Do Target outer diameter D Work outer diameter M Memory Ve extrusion speed data Ve 'extrusion speed command Vt take-up speed data Vt' take-up speed command Vepn input extrusion speed Vpn input take-up speed

Claims (6)

[Claims] 1. An extruder for supplying an extruded material to an extrusion line, a take-off machine for taking out a work after extrusion, an outer diameter detector for detecting an outer diameter of the work, and a take-up motor of the take-up machine. The take-up speed of the extruder is accelerated and decelerated to the set final speed, and the extrusion motor of the extruder is driven by driving the extrusion motor of the extruder so that the workpiece outer diameter obtained in the extrusion line becomes the target outer diameter. A control device for controlling an input extrusion speed with respect to any one or more input take-up speeds at the time of line speed acceleration / deceleration other than the target outer diameter, the take-up acceleration and the set final speed. An input device that can be input as the actual work outer diameter data for one or more actual take-up speed data by detecting the rotational speed of the extrusion motor of the extruder and the take-up motor, respectively. An extrusion speed detector and a take-up speed detector that provide actual extrusion speed data to the controller; an updatable memory that stores the input target outer diameter from the input device, each input take-up speed and an input extrusion speed; Controlling the drawer and extruder with control characteristics and calculating a new extrusion speed for the input pulling speed from the actual extrusion speed data at the input pulling speed or the difference between the input extrusion speed and the target outer diameter and the actual workpiece outer diameter data. And an controller for rewriting the input extrusion speed in the memory to a new extrusion speed. 2. An extruder for supplying an extruded material of an extrusion line, a take-off machine for taking out a work after extrusion, an outer diameter detector for detecting an outer diameter of the work, and a take-up motor of the take-up machine. The take-up speed of the extruder is accelerated and decelerated to the set final speed, and the extrusion motor of the extruder is driven by driving the extrusion motor of the extruder so that the workpiece outer diameter obtained in the extrusion line becomes the target outer diameter. A control device for controlling an input extrusion speed with respect to any one or more input take-up speeds at the time of line speed acceleration / deceleration other than the target outer diameter, the take-up acceleration and the set final speed. Step 1 of inputting and storing as: the actual take-up speed data, the actual extrusion speed data, and the outside of the actual work by driving the take-off machine at the input take-up speed and driving the extruder at the input extrusion speed. Step 2 of measuring data; Step 3 of calculating a take-up speed command to the take-up machine from the actual take-up speed data and the set take-up acceleration; and taking-up speed command of the take-up machine reaches the input take-up speed. Judgment is made as to whether or not the actual pulling speed data reaches the same input pulling speed, the actual pulling speed data or the input pulling speed calculated from the input extrusion speed and the difference between the target outer diameter and the actual workpiece outer diameter data. And 4, updating the input extrusion speed with a new extrusion speed for determining whether the actual take-off speed data of the take-off machine has reached a set final speed and determining whether the actual take-off speed data of the take-off machine has reached the set final speed. Steps 6 and 7 for terminating acceleration and deceleration of the actual take-off speed data of the take-off machine when the speed is reached, and holding the actual take-off speed data of the take-off machine at the set final speed; When the take-up speed data does not reach the set final speed, a step of calculating from the take-up speed command calculated in the step and the extrusion speed command to the extruder suitable for the target outer diameter from stored control characteristics. 8, a step 9 of correcting the extrusion speed command so as to make the outer diameter deviation between the actual work outer diameter data and the target outer diameter zero, and the pulling motor of the pulling machine is controlled by the pulling speed command. Driving the extrusion motor of the extruder and returning to step 2 above. 3. An extruder for supplying an extruded material of an extrusion line, a take-off machine for taking out a work after extrusion, an outer diameter detector for detecting an outer diameter of the work, and a take-up motor of the take-up machine. The take-up speed of the extruder is accelerated and decelerated to the set final speed, and the extrusion motor of the extruder is driven by driving the extrusion motor of the extruder so that the workpiece outer diameter obtained in the extrusion line becomes the target outer diameter. A control device for controlling an input extrusion speed with respect to any one or more input take-up speeds at the time of line speed acceleration / deceleration other than the target outer diameter, the take-up acceleration and the set final speed. An input device that can be input as, each input take-up speed from the input device, an input target outer diameter,
Updatable memory for storing the input extrusion speed, and controlling the drawer and the extruder with the input extraction speed and the input extrusion speed from the input device, and using the built-in control characteristics to control the input extraction speed. From the difference between the actual extrusion speed data and the input extrusion speed and the difference between the target outer diameter and the actual workpiece outer diameter data data obtained from the outer diameter detector, a new extrusion speed for the input take-off speed is calculated and the input extrusion speed in the memory is calculated. An outer diameter control device for an extrusion line, comprising: the controller for rewriting a speed to a new extrusion speed. 4. An extruder for supplying an extruded material of an extrusion line, a take-off machine for taking out a work after extrusion, an outer diameter detector for detecting an outer diameter of the work, and a take-up motor of the take-up machine. The take-up speed of the extruder is accelerated and decelerated to the set final speed, and the extrusion motor of the extruder is driven by driving the extrusion motor of the extruder so that the workpiece outer diameter obtained in the extrusion line becomes the target outer diameter. An outside diameter control device for an extrusion line having a controller for controlling the input extrusion speed with respect to the input take-off speed at any one or more points at a line speed acceleration / deceleration other than the target outside diameter, the take-up acceleration and the set final speed. Step 1 of inputting and storing the data as: and Step 2 of driving the puller at the input pulling speed and driving the extruder at the input extrusion speed to measure actual work outer diameter data; Calculating a new take-up speed to the take-off machine from the speed and the set take-up acceleration; determining whether or not a take-up speed command of the take-up machine has reached the input take-up speed; When the speed data reaches the same input take-off speed, the input extrusion speed is set to a new extrusion speed with respect to the actual extrusion speed data or the input extrusion speed and the input take-up speed calculated from the difference between the target outer diameter and the actual work outer diameter data. Steps 4 and 5 for updating, judging whether the take-up speed of the take-up machine has reached the set final speed, and terminating the acceleration / deceleration of the take-up speed of the take-up machine when the take-up speed of the take-up machine has reached the set final speed. Steps 6 and 7 for keeping the take-up speed of the take-up machine at the set final speed
When the take-off speed has not reached the set final speed, a calculation is made from the take-off speed calculated in the step 3 and a control characteristic storing an extrusion speed command to the extruder suitable for the target outer diameter. Step 8 to obtain, a step 9 to obtain a corrected extrusion speed to make the outside diameter deviation between the actual work outside diameter data and the target outside diameter zero, and a take-up motor of the take-up machine with the new take-up speed command.
A step 10 of driving the extrusion motor of the extruder at a new extrusion speed and returning to the step 2; 5. The extrusion line start-up device according to claim 1, wherein the outer diameter control device is an extrusion line start-up device designed only for the purpose of accelerating and decelerating the line speed of the extrusion line. Outer diameter control device. 6. The outer diameter control method according to claim 2, wherein the outer diameter control method is applied to an extrusion line start-up device for accelerating and decelerating the line speed of the extrusion line. .