JPS6099403A - Control method of rolling for single stand multipass rolling mill - Google Patents

Abstract

PURPOSE:To prevent the mechanical damage of each part of rolling mill by providing a device used for estimating the run-out of material tail-end at each rolling pass, etc. and transferring the roll speeds from different speeds to equal speeds when work rolls are in danger of being in direct contact with each other. CONSTITUTION:A titled device is constituted of a tracking device 20 at an inlet side of the 1st pass, the 2nd detector for detecting the breakage of a material A to be rolled, a device for generating timing, and speed setting device 26 for setting a target speed-value necessary for the purpose of transferring the upper and lower work rolls at each rolling pass to the equal speed running in accordance with the timing generated by the timing generating device. The device 20 estimates the timing of tail-end run-out at each rolling pass basing on the detecting signal of the tail-end position of material A. Further, the timing generating device generates the timing necessary for transferring the upper and lower work rolls at each pass from different speeds to equal speeds basing on the output signal of device 20, prior to the run-out timing of tail-end position or breaking position of material A.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention involves rolling a material to be rolled in a meandering manner on each rolling pane between the upper and lower work rolls by stacking eight work rolls. This invention relates to a rolling control device in a 1-nutand multi-pass pressure rolling machine.

[Technical background of the invention and its problems]

Conventionally, general rolling mills have been configured for rolling one pane with 12 tans. However, in this type of rolling mill, the rolling reduction rate per stand is at most 40 steps, so in a tandem rolling mill, it is necessary to perform further reduction rolling by increasing the number of bolts.

This was the cause of the increase in Conut and Nupeine. Recently, however, attention has been paid to the 1-stand multi-mass rolling mill for the purpose of cost saving and nupaine, as described in ν11, for example, Japanese Patent Application No. Sho 56-17105 (Japanese Patent Application Sho 54-91478). ing. This has been achieved by installing three or more work rolls, compared to only two in the past, passing the material to be rolled between each work roll in a meandering manner, and rolling the material by sequentially changing the speed of each work roll according to the rolling reduction ratio. This enables multi-panu rolling. If such a 1-nutand multi-panu rolling mill is used, the rolling reduction rate per 1 nutand is 70.
This makes it possible to perform high-reduction rolling.

However, in this rigid one-nutand multi-panu rolling mill, if the work rolls continue to rotate in a state where there is no material to be rolled between the work rolls due to plate breakage, tail drop, etc., the work rolls may There will be direct contact at different circumferential speeds.

Therefore, mechanical overload was applied to the roll surface, roll shaft, gear 7, and other parts, which could lead to damage.

[Purpose of the invention]

The present invention was made to solve the above-mentioned intercondylar point, and the work rolls directly contact each other at different circumferential speeds due to plate breakage, bottom drop, etc. It is an object of the present invention to provide a rolling control device that prevents accidents that cause mechanical damage to the roll surface, roll shaft, gear, and other rolling mill valleys.

[1 Summary of the Invention] In order to achieve this object, the present invention predicts the timing at which the material to be rolled passes through each rolling pane, and the predicted timing at which the material to be rolled passes through each rolling pane is performed in advance of the timing. At the same time, the upper and lower work rolls of each rolling pane are shifted from a true speed operation state to a constant speed operation state, and a break in the material to be rolled is detected, and when this plate breakage is detected, a 4. The vertical and vertical production rolls are changed from a different speed rotation state to a constant speed operation state.
I try to do something in the evening.

[Embodiment of Ji6mei] Hereinafter, one embodiment of the present invention will be explained with reference to Fig. 1 and Fig. 2 of the present invention.

Figure 1 is a side view of a one-button, multi-pane rolling mill, such as a one-button, multi-pane rolling mill, which is a part of the present invention.

In the Eki 1 diagram, 1 is the first work roll, 2 is the second work roll, 8 is the third work roll, and 4 is the 4th year roll, and these 1st to 4th younger work rolls 1 to 4 are The rollers are stacked and sandwiched between a lower backing roll 5 and an upper backing roll 6. The material to be rolled A is rolled as it passes through the rolls 1 and 2, 2 and 8, 8 and 4+t+J of each product in a meandering manner in the direction indicated by the arrow. In this way, three pressure pannus are performed per kutand, and from now on, these will be referred to as the first panu, the second panu, and the younger brother three panu, in order from the bottom. Drawer roll 7 or dλ2 panu and 8th for the 1st panu and 2nd panutono music.
There is a drawer roll 8 in the same place as Panu, respectively.
Each Panu plays the role of pulling out the material to be rolled in the south. In addition, if you are not sure about the rolling material A ke υ in each pan IWJ, roll 1-r in the condition shown by the broken line in 6., 1. I< has become. The tension meter roll 9 for detecting the tensile force is installed on the 1st panel that was cut, and the tension meter roll IO is installed on the 3rd panel.
Yes, they are all installed.

FIG. 2 is a purchasing diagram of a rolling control device for a rolling mill. In the figure, zoi. hmi pane entry side tracking vortex 1g, this tracking vortex 20 is for tracking the tailings level η1 of the material A to be rolled on the first pane entry side, and the tension meter roll 9 By manually inputting the output signal of the rotation speed detector (for example, PAL 2 GENE V-TA) 21 connected to the PAL 2 GENE V-TA 21 and the position signal 22 of the tension meter roll 9, the generated PALNU number Pt of the PAL 2 GENE V-TA 21 is calculated. By counting, the tail end position of the inclined side A to be rolled is calculated and the tail end position signal 23 is sent to the first. The signal is sent to the 20th rule constant velocity command unit 24. 1st. At the 20th wheel constant speed command device 24, the tail end position receives the signal 23, and the tail position 1i- reaches the position where the hands of the tail end are smoothly pressed together. At the point when it is detected that the 20th - Speed up command 25 (IL - Sends to speed setting device 26).

Jiraniko No. 1. In record 20-Le uniform velocity command contribution 24,
Tension meter 27 attached to tension meter roll 9
Detection power of 28 people and this detection %Ji force of 28, ash removal or plate breakage I) The second speed-up command 25 is not sent to the speed setting device 2 (i, and the function is switched to 44. Zheng 2. 80th which is the output signal of the 30th constant velocity command device 430
8. uniform velocity command 31; 8 + i) which is the output No. 48 of the 40th-rule constant velocity command device C32! 1,4 c
The l-ru curve/linkage command 33 is input. Here's the second one.
The 30th constant velocity command device yzn inputs the detected tension 35 of the pull-out roll 7 and the tension meter 34, and
, 2nd and 30th-L development commands 3 were issued to ll-1, where the detected tension 35 showed ``4'' due to ash removal or plate breakage.
1 Not sent to 2fi with north degree setting device. God'ia:
81 a゛, 401 constant velocity command 32, input the output force 37 of the tension meter 36 that was pierced several times on the pull-out roll 8, and detect it by removing the ash or breaking the plate. ! i long force 37
If you add chopsticks ÷ tension, you get 5 coffins at 1 time, 89. A speed saving command 33 is sent to the speed setting device head 26. Speed setting 1
Zuni 1iiiI: 26 is IL of each work ζ: 10-rules 1 to 4
1) 1■ Recorded smart speed command 25.31.33 Purple human power, each command 25.3
According to 1.33・1′1-shi）“・Roll 1.2
．． 8. 4 jN practice target value Vll V21 VB2
V4 k'is speed control device F240°41, 42.
I sent it out on 43rd. And this G speed, control 11
1t of ridges? o, 41.42.43, 1', Shitani Sakurai roll drive motor 44.45.46. ' 47 rotation speed is controlled. The upper backing roll 6 is equipped with a detector (for example, a-docel) for detecting plate breakage and ash removal.
is attached, and this load cell output 51 is given to the equalization command device 24.3F1.32 to detect ash removal and plate breakage.

The rolling flrtl a configured as above? - Explain the behavior of bonds. First, let's look at the process of removing ash from the rolled material A. The operation of example i will be explained.

As the material to be rolled A is rolled through the first to third vanes, the first pane entry side trucking unit 2o is connected to the tension meter roll 9 based on the position signal +522 of the tension meter roll 9. The tail end position to the material to be rolled is calculated by counting the number of pulses generated by the nuclear generator 21, and the tail end position signal 2: one is outputted to the first. 20th-
is given to the constant velocity command device 24. Then “L 2nd o-
When the tail end position reaches the predetermined position 16 in front of the first panu, the le constant velocity command device j724
．． 20- A uniform speed command 25 is given to the speed setting device 20. Dimensions 1st. The second class connection command price 24 is the tension meter 27
Even if the detected tension 28 of the 1st. 20th - Le constant speed command 2
5 to the speed setting device 26. 1st. The speed setting device 626 that receives the uniform velocity command 25 for the first work roll 1 sets the ratio of the uniform velocity scale 11αV1 and V2 of the work rolls 1 and 2 to 1, and adjusts the required circumference of the first work roll 1. Speed target
1. The circumferential speed target value VS of the second work roll 2, the circumferential speed target value VS of the third work roll 3, and the No^J speed group target area V4 of the first work roll 1 are set for each speed wave 1 series. Control device i: 41.
Given on 42.43.44. Then, valley speed concealment control 14:
41.42.4+3.44 is Tanisaku pear roll drive electric type/14.45.46.47 is Tanisaku peripheral speed target value v,,v
,.

■ 1st work roll 1 to move 31V4 and threaten 6
and the second work roll 2 transition from the different speed rolling state to the constant speed rolling state. Because the first and second work rolls 1.2 rotate with the same series of losses, the tail end 11' of the material to be rolled passes between the first work roll 1 and the second work roll 20 due to the collision. , ash removal can sometimes prevent the upper and lower work rolls 271 of the first panu from coming into contact at different speeds. Note that the epicenter of the circumferential speed target value, which is safe for the transition from the different speed rolling state to the constant speed rolling state, may be set stepwise or with a certain slope, or may be set in advance at 4' This may be done according to a predetermined pattern.

Next, the second. In the 30th rule constant velocity command device 30, the first
When it is detected that the tension 35 detected by the tension meter 34 becomes zero due to the end of the pass or the plate breaking between the first and second panu, the second panu. A 30th wheel constant speed command 31 is given to the speed setting device 26. Second. The speed setting device iQ'26 that received the 80th-rule uniform velocity command 31 sets the ratio of the peripheral speed target values ■, and ■, of the work roll 2.8 to 1, and sets each predetermined peripheral speed target value to 1. Value ■1 e ■2 r ■3s ■4 for each speed control device 40.41. , 42.43. Due to this, the upper and lower east rolls of the 2 puffs rotate at the same speed,
Upper and lower work rolls 3 whose tail end position or breakage position is the second Panu
, 2, the upper and lower work rolls 3 and 2 can be prevented from coming into contact at different speeds.

Furthermore, the third. The 40th wheel constant speed command device 32
When it is detected that the tension 37 detected by the tension meter 36 becomes zero due to the bottom of the panu slipping out or the plate breaking between the second to eighth passes, the third. A 401-th rule constant speed command 33 is given to the speed setting device. Third. In response to the 40th-role constant speed command 33, the Sokukan 2 Wholesale Goso W26 is the work roll 3 of the 3rd panu of Sakucha.
, 4's circumferential speed, j + a, the ratio of vs and ■4 is 1
Set each predetermined circumferential speed target value ■1 + Vt + V
s + V4 efra degree 1tjllt'll outfit! 40
．． 41° 42, 43. Thereby, it is possible to prevent the above-mentioned and colleague's three-pass upper and lower work rolls 4.3 from coming into contact with each other at different speeds.

Note that the load cell output 51 from the load cell 50 is input to the equal connection command device 24, 30, and 32, but this is because the force applied to the load cell 50 changes considerably when the bottom is pulled out or when the plate breaks. Utilizing this fact, it is used as a backup signal for detecting tail drop and plate breakage, and
．． This is to ensure that the operations in 30.32 are performed reliably.

Therefore, in this embodiment, three work rolls 1 to 4 are stacked, and the breaking rolled material is passed in a meandering manner between each roll, and the probing depth of each work roll 1 to 4 is adjusted according to the rolling reduction rate. te/IIE'i
In a one-stand multi-pass rolling mill that performs rolling at different intervals, the timing at which the rolled paulownia roll ends each pass is predicted, and each Panuchi work roll is rolled in advance of the predicted ash removal timing of the valley pass. 1 to 4 are configured to shift from the hot water speed operation state to the constant speed operation state, and when the roof plate breakage is detected, the up and down production rolls on the downstream path from the Kei break 1 valve are also in an increased speed operation state (1 to move from constant speed driving condition to law (
With this structure, it is possible to prevent mechanical damage to the roll surface, the roll shaft, the key, and other parts of the rolling machine that would otherwise occur if the work rolls 1 to 4 collide with each other.

Incidentally, in the above example of the 5 pretexts, all of the work rolls 1 to 4 are driven by the drive +A44 to 47, but the first work roll 1 may be an idle roll. Furthermore, the total length of 34°36 for the two lids in Fig. 2 cannot be used in the rolling form shown by the broken line in Fig. 151; By attaching a load cell to the plate and detecting plate breakage and bottom removal, it is possible to perform the same function as shown in Fig. 2. Furthermore, it is not the case that the above embodiment can also be applied to a rolling mill with 4 buses per stand.

〔Effect of the invention〕

As mentioned above, in the present invention, there is a risk that the work rolls 10 in contact with each other may run out of material to be rolled due to tail drop, plate breakage, etc. in the l-stand multi-pass rolling mill, and the work rolls may directly contact each other. Then, +j+W so as to quickly shift from the different speed running state JS ζ to the constant speed J running state 1.
BJ, it is possible to prevent mechanical damage to the roll surface, roll spiders, gears, and the valleys of the elongation rolling mill, which are a concern when they come into contact with each other.

[Brief explanation of drawings]

FIG. 1 is a side view of a multi-pass rolling mill to which the present invention is applied, and FIG. 2 is a block diagram of a rolling control device showing an embodiment of the present invention. 1 to 4... work roll, 5. ri...back roll, 7
゜8...Drawer roll, 9. 1.0... Tension meter roll, 20... First panel latching device, 2]... Pulse generator, 24...
・it, 20th rule i equalization command device, 26...speed setting device j\, 27.34.36...tension meter, 30...
・Second. 80-Le constant velocity command device, 32...3rd.
Skin 40 - Roll constant velocity command device, 40-43... Speed 1 strain control device, 44-47... Work roll drive (city machine),... Material to be rolled. Applicant's agent Kiyoshi Inomata District 1

Claims (1)

[Claims] (1) It has three work rolls, and the rolling phase is 1llIL in a meandering manner on each rolling pan between adjacent work rolls, and the speed of each rolling work roll is sequentially varied according to the rolling reduction ratio. Based on the detection signal of the first detector which detects the rolling of the bamboo 51 nutando (in some cases, the first rolled material is the tail end of the rolled material) a second detector for detecting cracks in the rolled material at the entrance side of the rolling mill and between each rolling and rolling mill; Based on each output signal of the second detector,
Kiri-ryo's tail position 1 white or broken l) [Article 1)■ The bottom removal is done prior to the timing [)1 (Kiriya I:!-The upper and lower work rolls of En Ikunu are moved from true speed operation to constant speed. A timing generator 6 that generates a timing for transitioning to an operating state;
A speed setting device is provided for setting a speed value for shifting the upper and lower work rolls of each rolling panel to a constant speed operation state according to the timing of the timing generator. Rolling control device for rolling. (2. In the device described in claim (1),
fnJ1 self-timing device is qff The bottom of the valley rolling bus predicted by the M-tracking device is removed in advance of the timing) 17-chi M11 The upper and lower rolling rolls of each rolling bus are changed from the state of interchanging at different speeds. Rolling tli1. of a 1-nutand multi-panu pressure 78 machine designed to generate timing before shifting to poor uniform speed operation. Control device 9゜(3) In the device according to claim (1), i11 the timing generator! On the west side, based on the detection signal of the detector of the front roller, the upper and lower rolls of each rolling roll located downstream of the fracture point H1 are changed from a different speed rolling state to a constant speed running state. A rolling control device for a 1-nutand multi-vanu rolling mill that generates timing for transition.