JPS60255228A - Method for controlling metal embossing device of process line for iron and steel - Google Patents

Abstract

PURPOSE:To assure the uniformity of the pattern formed by embossing in the stage of embossing a steel sheet by maintaining the equal tension on the inlet and outlet sides of embossing rolls and supplying only the load necessary for embossing to an embossing device thereby executing the ideal control. CONSTITUTION:The embossing rolls 2 for the steel sheet are disposed between an inlet side bridle roll 1 and an outlet side bride roll 3 and a tension gage 23 is installed on the outlet side of the rolls 2 to detect the tension Te on the outlet side of the embossing rolls. The tension gage is otherwise provided on the inlet side of the rolls 2 to detect the tension Te' on the inlet side of the rolls. The load of the rolls 2 is automatically detected in accordance with the detected tension value and the pattern on the steel sheet by embossing is formed always uniformly. The tension on the inlet side or the outlet side of the rolls 2 may be otherwise estimated in accordance with the detected torque value of the bride roll 3 on the outlet side and the load for embossing may be set in accordance with the estimated tension.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for controlling a metal enhancer device in a steel process line in the steel industry.

[Conventional technology]

First, the control of a conventional metal embossing device in a steel process line will be explained with reference to FIG.

In the figure, (1) is the entry side bridle roll, (2) is the embossing roll, (3) is the exit side bridle roll, (4) is the input side bridle motor, and (5) is the embossing motor 1. (6
) is the exit flywheel motor, (11) is the embossed load setting device, (12) is the linear accelerator, (13) is the speed setting device,
(21) is a looper, (22) is a tension reel, (2
5) is an embossing speed detector, (26) is an exit side bridle speed detector, (28) is an embossing motor control unit with drooping characteristic A, and (290; an exit side bridle motor control unit for 1 speed control) , (34) is an inlet bridle outlet tension setting device, (old) is an inlet bridle motor control unit for i-lux control, (42) is a louver tension setting device, (44) is a tensile reel motor, (46) is a tension reel motor control unit for tension control, and (47) is a tension reel tension setting device.

Such a conventional metal embossing device uses a priddle roll (1,
1. (Since it is installed between 31 and 31, the torque-speed characteristic curve of the metal embossed drive device has a drooping characteristic to control the speed, and information obtained from the operation results according to the characteristics of the embossed pattern. A control method is adopted in which the load setting device (11) is manually adjusted based on the following.

Figure 5 shows the control pattern of each control device, (a
l is entry side priddle roll, (hl is embossed, fcl
shows the respective control patterns of the exit side priddle roll. That is, the control pattern of the entry side priddle is (al
As shown in the figure, the torque is controlled to be constant with respect to the rotational speed.
Embossing is controlled by changing the output l/lux using a load setting device as in (bl) and setting a load that matches the pattern as in area (11 or (2)) in the same figure. The exit side priddle roll is controlled so that the rotational speed is constant with respect to the torque, as shown in FC+.

However, metal embossing can be considered a type of mill;
Making the embossing inlet and outlet tensions equal and having the embossing device supply only the load necessary for embossing is a condition for making the strip pattern uniform and not causing load disturbance to other sections. The reason for this can be explained as follows.

In the diagram shown in FIG. 6, when the embossing roll (2) is rolled down, the embossing entrance tension is set to 1.8. Tt is the tension equivalent value of the load torque required for embossing.

If the tension on the exit side of the emboss is T, then the output P required for embossing is expressed as a constant: P = k (T, +T"t Td) k; Here, the tension that changes before and after rolling down the emboss is: This is because of Td. If T6 is set equal to '■゛8, the emboss will be supplying only its own load (load determined by the pattern), and the tension distribution will not change before and after the embossing is rolled down, so Disturbances to other sections can also be eliminated.

However, in the case of the above method, since the embossing load is manually set (the load setting amount is adjusted to TL), the tension on the exit side of the embossing is not necessarily equal after the embossing is lowered.

That is, in Fig. 6, if the load is set too much on the inlet pry roll (1) side, T, ... > Td, and if the load is set too low on the outlet pry roll (3) side, T, <
It becomes Td. Therefore, the suitability of this manual load setting method is problematic.

Furthermore, when changing the pattern such as remodeling or changing the board size, the emboss load TL changes, so the manual setting device (11
), unless the load adjustment amount is changed by T,,=
Although it is not possible to adjust the temperature to Td, it is difficult to respond quickly with manual adjustment.

Next, consider speed control with droop characteristics.

FIG. 7 is a block diagram showing the configuration of the speed control system.
SR is speed, amplifier, ACR is current amplifier, N r e
f is speed command, N7 is load adjustment, N, b are detected speed,
1゛r is a torque command.

When the embossing roll is opened and speed control with drooping characteristics is performed, the load-speed characteristics are as shown in FIG. At this time, the gain of ASR is set to -10.

Therefore, if the load adjustment is set to 10% with respect to the 100% speed command, the speed will be 110% at no load and 100% speed at 100% load.

Next, when the emboss is rolled down and the above control is performed,
The load-speed characteristics are as follows.

(When 11Nt=o, the load adjustment is N. If it is -0, the strip speed is kept at the exit side priddle, so N r n f and N fb are completely matched, and the embossing speed deviation ΔN is Therefore, in this case, the embossing motor is not working. However, the load necessary for embossing must be supplied from somewhere, so in this case, the output side priddle is This will supply the necessary load for embossing.Therefore, the tension of the strip on the exit side and the strip on the input side will change before and after the embossing is rolled down.

In order to keep the tension of the strip on the entrance side of the exit bridle from changing before and after the embossing reduction, 9 load adjustment N is required. It is necessary to properly adjust the load and apply a load equivalent to TL2-Ttl in Figure 9 (bl) to the emboss side. Here, TLl is the load torque when the embossing is opened, and T3.2 is the load torque when the emboss is lowered. It is.

This shows that manually setting the Enhos load is extremely difficult.

(If 21Nr is adjusted and set, then the diagram 9 shows the case where load adjustment NT is adjusted and set.
Figure (C1, (di) shows.

In this figure, (cl indicates the speed-load characteristic of Enphos, id+ indicates the speed-load characteristic of the exit side priddle, and if the dimensions of load % are the same, then NT-K = 1ONt-T1.4 (ItT t a
= T t 2 T t ] f2);, Nr= (
The relational expression Tt□-T'L a)/10 (31) holds true.

[Problem that the invention seeks to solve]

The present invention is an improvement over the conventional manual method, which requires changing load settings each time a pattern is changed, making it difficult to respond appropriately and quickly, and also difficult to ensure pattern uniformity. The purpose is to solve the problem of load setting.

[Means for solving problems]

The present invention makes the tension on the exit side of the embossing roll equal,
This system is designed to ensure uniformity of the pattern by supplying only the load necessary for the embossing to the embossing device to perform ideal control, and will be specifically explained below based on an example.

FIG. 1 is a block diagram showing the configuration of a first embodiment of the present invention, and the same components as in FIG. 4 are denoted by the same reference numerals, and the description thereof will be omitted. This example shows a case where a tension meter (23) is installed on the exit side of the metal embossing (2), a looper (21) is installed on the entrance side of the entrance bridle roll (1), and a The exit side of (3) is equipped with a tension reel (22). Usually, before using the metal embossing roll (2), the exit priddle roll (3) is connected to a control part (29) (this control part consists of a thyristor Leonard device, for example, a thyristor main circuit current minor control part, a speed Consists of a control section.

) is controlled (speed master), and the inlet prydle roll (1) is controlled by the inlet prydle outlet tension setting device (
34) and the tension is controlled by a foot hack from tension M-1 (23) with speed minor control (31).

The reason why speed minor control is performed is to increase the damping of the tension control system and improve the response to tension fluctuations. The control section (27) is composed of the control section (29) except for the speed control section. In this state, the metal embossing roll is rolled down. When the embossing roll is rolled down, the entry side priddle (1) holds the current torque command T,'' in the hold circuit (32) (Fig. 2) (C)).This hold circuit (32) can be configured with R and C and a relay in an analog circuit, but if it is configured in software using a microcomputer, the value of TM8 is transferred to another memory register. It can be made to remember.

The tension control can be switched to the torque control using the software switchers (30A) and (3011) (the analog circuit is composed of R and C first-order delay circuits).

In other words, the soft switch (30A
) output is 01 (30B) output is l.

This switching is performed as shown in Figure 2 fdl and fiil.
- Since it is carried out through the next delay circuit, the control unit (
The input to 27) can be approximately constant. That is,
The addition point inputs a and b in Figure 1 are shown in Figure 2 (bl,
(C1), and the output S of the addition point is almost constant as shown in the figure (al).

In addition, in the case of torque control, acceleration/deceleration torque compensation is required, so the output of the linear accelerator (12) is 1. ? It is necessary to compensate for this. If this is done, this torque command TM8 is 1, which is the same as the 1-lux command during tension control before rolling down the embossing, so the embossing roll entrance tension 'ra'
It can be seen that the command is such that it matches the tension setting device (34).

Simultaneously with the above control switching, the tension of the metal embossing roll is controlled by the tension control section (35) based on feedback from the tension setting device (34) and the tension detector (23).

The output from the tension control section (35) is outputted through a soft switch (30C) in order to avoid sudden fluctuations in the embossing roll (see Fig. 2 ffL (g)).

The control section (28) has the same configuration as the control section (29) and has a speed minor control section. In this way, the embossing roll exit side tension T can also be made to match the tension setting device (34), and the embossing roll exit side tensions can be made equal. Therefore, if the load on the metal embossing roll is automatically determined by this method, it is possible to ensure the uniformity of the strip pattern.

FIG. 3 shows a control block diagram when a tension meter cannot be installed on the exit side of the metal embossing. In this case, before the metal embossing roll (2) is used, the speed of the exit prydle roll (3) is controlled as in FIG. 1, and the speed of the inlet prydle roll (1) is controlled by the looper tension setting device 42) and an inlet tension setting device (34), the control unit (old) controls the tension. The control section (old) has the same configuration as the control section (27). The tension of the looper is controlled by a tension setting device (34). Further, the tension of the tension reel (22) is controlled by a tension setting device (47) by controlling a tension reel drive motor (44) by a control section (46). From this state, the metal embossing roll (2) is rolled down, but when the embossing roll is rolled down, the embossing roll outlet tension T8 changes compared to before rolling down. This change in the tension Te only appears in the i-lux of the outgoing prydle roll drive motor (6) because the incoming prydle roll is under torque control and the tension reel is under tension control. Therefore, the l·lux of the exit side ply roll (3) is detected, and the emboss exit side tension 'F8 is estimated from the bristle roll diameter and the tension reel tension setting device (47), and this estimated value is the tension If the tension of the metal embossing is controlled by the tension control unit (35) so as to match the tension setting device (34), the tension on both the entrance and exit sides of the embossing roll can be made equal and consistent with the tension setting device (34). The same control as that performed in the embodiment of FIG. 1 can be performed.

The embossing exit tension T8 can be calculated by the tension calculator (43) using the following equation.

T, = (2TM)/(ηMD) +Ta 141 Here, TM: Exit side priddle torque (kg-m) 4M =
Output side prydle efficiency (including mechanical and electrical) D: Outlet side prydle roll diameter [m] T4: Tension reel tension setting (kg) This control method appropriately applies the load on the strip processing device to ensure uniformity of the strip. It can be applied to maintain the tension of the strip or to control the tension of the strip at a constant level. For example, (1) In a steel process line, determining the load on the pinch roll when the pinch roll is used by being rolled down from the open position during line operation.

(2) In stainless steel shear lines, in order to avoid leveler marks, the line is operated and the leveler is lowered from 2. In this case, the load on the leveler is determined.

In addition to matching the tension on the exit side of the processing equipment,
If you install a ratio setting device, you can easily set a certain ratio to the tension on the exit side.

〔Effect of the invention〕

-L As mentioned above, according to the present invention, the tension control method using a tension detector makes it possible to appropriately and quickly set the metal embossing load, and to equalize the tension on the exit side of the embossing roll. , it is possible to perform ideal control in which the embossing device supplies only the load necessary for embossing, and it is possible to ensure uniformity of the pattern.

Further, when a tension detector is not attached, by automatically estimating the tension, the same control as when using a tension detector can be performed. Therefore, operability, application”
The second problem can be solved, and it is particularly effective when a tension detector cannot be attached because the strip span is too short, or when it is not desired to attach a tension detector due to cost considerations.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a first embodiment of the present invention,
Fig. 2 is an operating waveform diagram, Fig. 3 is a block diagram showing the configuration of the second embodiment of the present invention, Fig. 4 is a block diagram showing the conventional control method, and Fig. 5 is each control device in the conventional method. FIG. 6 is an explanatory diagram showing the relationship between the tension on the entrance and exit sides of the embossing roll. FIG. 7 is a block diagram showing the configuration of conventional speed control with drooping characteristics. FIG. is a load-speed characteristic diagram thereof, and FIG. 9 is a load-speed characteristic diagram according to the conventional control system. (1): Entry side pridle roll (2): Metal embossing roll (3): Output side pridle roll (4) Two-person side pridle drive motor (5): Metal emboss drive motor (6): Output side pridle drive motor ( 12): Linear accelerator (13): Speed setter (21): Looper 5 (22); Tension reel (23): Tension detector (24) to (26): Speed detector (27): Inlet side priddle motor Control part (2B):
Metal embossing motor control section (29); Output side priddle motor control section (30A) to (30C): Soft switch (31): Speed control section (32): Hold circuit (33): Tension control section (34): Tension setting device (3, 5): Tension control section (41): Entry side bridle motor control section (42):
Looper tension setting device (43): Metal emboss output side tension calculator <44・'
) : Tension reel drive motor (46) : Tension reel motor control unit (47) : Tension reel tension setting device Patent applicant Yaskawa Electric Co., Ltd. Representative Masu Tegori (and one other person) 6 Figure 2

Claims (1)

[Claims] 1. In a steel process line having a metal embossing device between pre-dol rolls, the tension on the entry side or the exit side of the metal embossing device is detected, and the embossing load is automatically determined based on that value. A metal embossing device control method that is characterized by ensuring uniformity of the pattern on the strip. 2. In a steel process line having a metal embossing device between the prydle rolls, setting the embossing load by estimating the tension on the input side or the exit side of the metal embossing device based on the detected torque value of the output side prydle roll. A metal embossing device control method that ensures uniformity of the pattern on the strip.