CN102615059B - Method for cleaning high-pressure water gun for leveler - Google Patents

Abstract

A method for cleaning a high-pressure water gun for a leveler includes a movement speed control method for the high-pressure water gun. The movement speed control method includes the steps: (1) establishing a movement speed control function model for the high-pressure water gun; and (2) transforming the set value of the movement speed of the high-pressure water gun into a 4-20MA analog current value and controlling the speed of a variable-frequency motor. In the movement speed control function model for the high-pressure water gun, input factors are running speed values of a backing roll and a working roll of a smooth section, and output variable is the movement speed of the high-pressure water gun, namely, the speed of the backing roll and the working roll based on the smooth section of a unit ranges from 10 M/MIN to 220 M/MIN. Firstly, n-1 points are set within the speed range, X1-Xn-1=30-220 M/MIN, and corresponding to the range of X1-Xn-1=30-220 M/MIN, the movement speed selection Y1-Yn-1 range of the high-pressure water gun corresponds to the 30-100 (%) speed range of X1-Xn-1. According to the method, a roll surface is completely and effectively covered in cleaning and has no color difference, and the quality defect of water gun marks are thoroughly avoided.

Description

Planisher giant cleaning method

Technical field

The present invention relates to equipment and the technical applications of cold rolling industry galvanizing unit planisher, particularly, the leveling-machine supporting-roller and the working roll that the present invention relates on a kind of continuous process for producing line clean with giant and cleaning method thereof.

Background technology

As everyone knows, giant purging system for five cold rolling hot dip galvanizing unit planishers is the important component part of planisher equipment, its design principle is exactly: smooth roll surface clean design adopts high pressure water flushing brush roll face, roll surface is cleaned, giant washes away roll surface along the scanning of roll surface transverse shifting on travelling car, object is exactly in order to remove the sticky zinc on backing roll and working roll, thereby guarantees that unit produces high-quality galvanizing product.

The giant purging system of planisher is comprised of two cover systems that are arranged on frame outlet upper surface and lower surface.Every cover system comprises two nozzles, is respectively used to the cleaning to leveling-machine supporting-roller and working roll, and meanwhile, the crosswise movement that is loaded with the dolly of giant adopts alternating current generator to drive, and absolute value encoder is used for high pressure dolly to carry out Position Control.(seeing that Fig. 1 and Fig. 2 are planisher upper surface giant mechanical construction drawing).

According to conventional art, owing to being loaded with the transverse shifting of the dolly of giant, be designed to constant speed control, translational speed is 40mm/S, therefore, there are the following problems for this kind of control model:

1. according to five cold rolling hot dip galvanizing unit actual motion effects, find, current dolly translational speed affects the quality that roll surface rinses, too fast also generation of translational speed rinsed covering completely, cause roll surface to produce aberration, the final belt steel surface that duplicates of aberration, forms the quality objection that hydraulic giant prints product defects.

2. the constant speed of giant dolly is controlled design, cause carrying out mating accordingly chain with the speed of smooth section of backing roll of unit and working roll, because the speed control range of smooth section of backing roll and working roll is 10-220M/min, so the speed of wide region is controlled, the drawback that dolly translational speed cannot be regulated is more obvious, operative employee often must be by regulating the pressure of giant, to eliminate with the hydraulic giant on steel and to print as far as possible.This causes operative employee's labour intensity to increase on the one hand, also makes on the other hand the control of hydraulic giant seal defect very unstable.

3. high-pressure wash region is full roll surface zone design, according to strip width variation, (the strip width scope of this unit is not: 700-1630mm) carry out location, corresponding position switching controls, the pure water resource of a large amount of waste units, has improved unit ton steel cost.

Summary of the invention

The problem existing in actual applications for prior art, the present invention proposes a kind of planisher giant device and cleaning method thereof.Described method comprises that the translational speed of giant is controlled and the Position Control of giant, the transverse mobile motor of described giant adopts variable frequency vector control, and the translational speed of described giant is controlled the control model mode of employing and smooth section of MRH (master control) velocity correlation connection; The control model that the Position Control of giant adopts strip width to automatically switch.

Technical scheme of the present invention is as follows:

A planisher giant cleaning method, the cleaning for to leveling-machine supporting-roller and working roll, is characterized in that, described planisher comprises the movement speed control method of giant with giant cleaning method:

Set up the translational speed control function model of giant:

It is the speed of service value of smooth section of backing roll and working roll, the function model of translational speed that output variable is giant that the translational speed control function model of described giant adopts enter factor, that is,

Velocity interval based on smooth section of backing roll of unit and working roll: 10-220M/MIN, first in described velocity interval, set n-1 point, X1-Xn-1=30-220M/MIN, corresponding to described X1-Xn-1=30-220M/MIN scope, by the selected scope of the translational speed Y1-Yn-1 of giant, be the 30-100% of corresponding described X1-Xn-1 speed; Corresponding to the speed X n=220M/MIN of smooth section of backing roll of described unit and working roll, the translational speed Yn of selected corresponding giant is 100% of described Xn speed.

According to the present invention, for realizing described technical scheme, the translational speed setting value of giant is converted to the analog current value of 4-20MA, what the translational speed setting value of giant adopted is the percentage of variable-frequency motor normal speed, be that motor is with the normal speed operation of 0-100%, the speed of control variable-frequency motor.

Thus, by the frequency conversion speed to giant dolly, control, the speed of smooth section of backing roll of giant translational speed and unit and working roll is mated accordingly, dolly translational speed regulates, and contributes to eliminate with the hydraulic giant on steel and print as far as possible.Described scope is according to the data that become mechanism and actual debugging to measure with molten steel rifle impression; It is maximum normal speeds that Yn elects 100 as.

According to band molten steel rifle impression, become mechanism, it is passable that X selects to set 2-3 point, and point should not be established too much, otherwise program can become very complicated.

According to a kind of planisher giant cleaning method of the present invention, it is characterized in that, corresponding to the scope of the speed X1-Xn-1 of smooth section of backing roll of unit and working roll, the percentage range that the translational speed Y1-Yn-1 of giant is chosen to be to corresponding X1-Xn-1 speed is: with the speed X1-Xn-1 of smooth section of backing roll of described unit and working roll scope corresponding to slope that be in line.

According to a kind of planisher giant cleaning method of the present invention, it is characterized in that, the speed based on smooth section of backing roll of unit and working roll: n is 3, and, X1=30M/MIN, X2=90M/MIN, X3=220M/MIN;

The Y1-Y3 corresponding to speed X1-X3 scope of smooth section of backing roll of giant and described unit and working roll is chosen to be: 30% of Y1=speed X1,50% of Y2=speed X2,100% of Y3=speed X3.

According to a kind of planisher giant cleaning method of the present invention, it is characterized in that, the speed based on smooth section of backing roll of unit and working roll: n is 4, and, X1=30M/MIN, X2=90M/MIN, X3=170M/MINX4=220M/MIN; The corresponding translational speed Y1-Y4 of the speed X1-X4 of smooth section of backing roll of giant and described unit and working roll is chosen to be: 30% of Y1=speed X1,50% of Y2==speed X2,100% of Y3=speed X3,100% of Y4=speed X4.

The machine group selection is provided with 2-3 point, and preferable range is respectively: X2=(80-100) M/MIN, X3=(160-180) M/MIN(X4 is the maximal rate 220M/MIN of smooth section of unit).

In figure according to the result X2=(80-100 that becomes mechanism and actual test with molten steel rifle impression) M/MIN, X3=(160-180) M/MIN.

The translational speed of giant control adopt and control mode that smooth section of backing roll and working roll (master control) velocity correlation join be applicable to the specification of steel be: thickness 0.25-2.3mm, width is: 700-1630mm.The speed control range of smooth section is 10-220M/min.

According to a kind of leveling-machine supporting-roller of the present invention and working roll cleaning, use giant cleaning method, it is characterized in that, described giant cleaning method also comprises the Position Control of giant, and its step is as follows:

Giant position set-point calculates:

$\mathrm{POS}\_\mathrm{REF}\_\mathrm{WS}=\frac{\mathrm{TPCAR}\_L}{2}-\frac{W\_\mathrm{STRP}\_\mathrm{SPM}}{2}+\mathrm{ZERO}\_\mathrm{OFFSET}--\left(2\right)$ $\mathrm{POS}\_\mathrm{REF}\_\mathrm{DS}=\frac{\mathrm{TPCAR}\_L}{2}+\frac{W\_\mathrm{STRP}\_\mathrm{SPM}}{2}+\mathrm{ZERO}\_\mathrm{OFFSET}--\left(3\right)$

Wherein:

POS_REF_WS: the Position Control set-point of giant fore side, the limit of fore side of take is spacing is reference coordinate, unit, 0mm, scope is: 0 to 1800mm;

POS_REF_DS: the Position Control set-point of giant transmission side, the limit of fore side of take is spacing is reference coordinate: scope as: 0 to 1800mm;

TPCAR_L: the stroke that giant is total, this unit is 1800mm;

W_STRP_SPM: the strip width in planisher region, this unit is: 700-1630mm, comes from the data that host computer issues;

ZERO_OFFSET: parameter (scope is below 30mm conventionally, depends on the side-play amount at planisher place with steel, if there is no side-play amount, value is 0mm) is adjusted in zero drift.This unit is: 0mm.

According to a kind of planisher giant cleaning method of the present invention, it is characterized in that, with above-mentioned formula (2) and (3), determined after the position set-point of giant fore side and transmission side, when the actual value of giant is less than the position set-point of fore side, send the action command to transmission side, and the set-point that automated location is controlled is simultaneously set as the position set-point of transmission side; When the actual value of giant is greater than the position set-point of transmission side, send the action command to fore side, and the set-point that automated location is controlled is simultaneously set as the position set-point of fore side; Go round and begin again and carry out automated location control.

According to a kind of planisher giant cleaning method of the present invention, it is characterized in that, described method for the specification with steel is: thickness 0.25-2.3mm, width is: 700-1630mm.

Thus, high-pressure wash region changes according to strip width that (the strip width scope of this unit is: 700-1630mm) carry out location, corresponding position switching controls, avoid wasting in a large number the pure water resource of unit.

According to a kind of leveling-machine supporting-roller of the present invention and working roll cleaning giant cleaning method; because the mobile variable-frequency motor that adopts of giant is controlled; it can make roll surface rinse fully effective covering, and roll surface no color differnece produces, the mass defect of thoroughly having avoided product hydraulic giant to print; After the speeds match of the translational speed of giant and smooth section is chain, operative employee does not need often to adjust hydraulic giant pressure, has guaranteed the quality of product, greatly reduces again operative employee's labour intensity simultaneously; The position of giant adopts after strip width automatic switchover control model, and the pure water resource of having saved unit, has greatly reduced unit ton steel cost.

Accompanying drawing explanation

Fig. 1 and Fig. 2 are respectively giant apparatus structure schematic diagram.

Fig. 3 is that the translational speed of giant is controlled model.

In figure, 1 is fore side memorial archway, and 2 is transmission side memorial archway, 3 is nozzle, and 4 is entrance track, and 5 is exit track, 6 is cylinder, and 7 is end face gusset, and 8 is chain, 9 is gudgeon base, and 10 is the fixing gudgeon of cylinder, and 11 is travelling carriage base plate, 12 is anchor tip support, and 13 is balancing pole, and 14 is motor, 15 is toothed disc, and 16 is driven tooth wheel disc.

The specific embodiment

Below, for embodiment, illustrate leveling-machine supporting-roller of the present invention and working roll cleaning giant cleaning method.

Embodiment

At the cold rolling 1730 galvanizing units of Baosteel five, implement the present invention.

The translational speed of giant is controlled the control model mode of employing and smooth section of MRH (master control) velocity correlation connection; The control model that the Position Control of giant adopts strip width to automatically switch.This control mode can effectively be avoided the mass defect printing with hydraulic giant on steel, reduces operative employee's labour intensity, has reduced the ton steel cost of unit.Be explained in detail as follows below: (embodiment be take band steel specification as 0.392*1020mm, and the speed of smooth section is 120M/MIN)

One, the translational speed control section explanation of giant

1, the translational speed of giant control model employing enter factor is smooth running speed value, and the translational speed function model that output variable is giant, is shown in Fig. 3.The process section maximal rate of this unit is: 180M/MIN; The maximal rate of smooth section is: 220M/MIN, threading speed is: 30M/MIN.

2, the speed of smooth section of unit: 10-220M/MIN scope, first set 2, two ends and be respectively: X1=30M/MIN, Xn=220M/MIN; Centre can become mechanism according to band molten steel rifle impression, selects to set 2-3 point, and passable, point should not be established too much, otherwise program can become very complicated.The machine group selection is provided with 2 points, and preferable range is respectively: X2=(80-100) M/MIN, X3=(160-180) M/MIN.(the present embodiment preferably provides X2=90M/MIN, X3=170M/MIN)

3, in figure according to the result that becomes mechanism and actual test with molten steel rifle impression, the corresponding translational speed Y1-Y4 of the speed X1-X4 of smooth section of backing roll of giant and described unit and working roll is chosen to be: 30% of Y1=speed X1,50% of Y2==speed X2,100% of Y3=speed X3,100% of Y4=speed X4.

According to the translational speed of giant, control model: calculating giant speed preset value is 75%.

According to following formula logical formula (1), the speed setting value of giant is converted to the analog current value of 4-20MA, control the speed of variable-frequency motor,

$L\_604\mathrm{<figure-callout\; id="100"\; label="VF"\; filenames="HDA0000147458980000013.png"\; state="\{\{state\}\}">VF</figure-callout>}100\_\mathrm{SRF}=\frac{S\_\mathrm{REF}*3200}{N_e}+800--------\left(1\right)$

Wherein: Ne: the normal speed value of giant device mobile motor.This unit is 1360 revs/min.S_REF: be 0.3Ne-Ne rev/min of the speed preset value (wherein Ne is the normal speed value of giant device mobile motor) of giant

The 3200th, the constant of analog quantity conversion use (referring to the operation manual of analog quantity fastener, the V3000 type simulated amount card operation manual of TMEIC issue on June 30th, 2006).

800 is a deviate (referring to operation manuals of analog quantity fastener), and the numerical value that 4MA is corresponding is: 800.

Thus, the frequency conversion speed of giant dolly is controlled, and the speed of smooth section of backing roll of giant translational speed and unit and working roll is mated accordingly, and dolly translational speed regulates, and contributes to eliminate with the hydraulic giant on steel and print as far as possible.

Two, the position control section of giant is divided explanation

1, giant position set-point calculates:

$\begin{array}{c}\mathrm{POS}\_\mathrm{REF}\_\mathrm{WS}=\frac{1800}{2}-\frac{1020}{2}+0--\left(2\right)\\ =390\mathrm{mm}\end{array}$

$\begin{array}{c}\mathrm{POS}\_\mathrm{REF}\_\mathrm{DS}=\frac{1800}{2}+\frac{1020}{2}+0--\left(3\right)\\ =1410\mathrm{mm}\end{array}$

Wherein:

POS_REF_WS: the Position Control set-point of giant fore side.

POS_REF_DS: the Position Control set-point of giant transmission side.

TPCAR_L: the stroke that giant is total.This unit is 1800mm.

W_STRP_SPM: the strip width in planisher region, comes from the data that host computer issues.(this example is 1020mm).

ZERO_OFFSET: parameter is adjusted in zero drift.This unit is: 0mm.

With above-mentioned formula (2) and (3), determined that giant fore side position set-point is 390mm, the position set-point of transmission side is: after 1410mm, when the actual value of giant is less than the position set-point 390mm of fore side, send the action command to transmission side, and the set-point of while APC (automated location control) is set as the position set-point 1410mm of transmission side; When the actual value of giant is greater than the position set-point 1410mm of transmission side, send the action command to fore side, and the set-point that automated location is controlled is simultaneously set as the position set-point 390mm of fore side; Go round and begin again and carry out automated location control.

According to a kind of leveling-machine supporting-roller of the present invention and working roll cleaning giant cleaning method; because the mobile variable-frequency motor that adopts of giant is controlled; it can make roll surface rinse fully effective covering, and roll surface no color differnece produces, the mass defect of thoroughly having avoided product hydraulic giant to print; After the speeds match of the translational speed of giant and smooth section is chain, operative employee does not need often to adjust hydraulic giant pressure, has guaranteed the quality of product, greatly reduces again operative employee's labour intensity simultaneously; The position of giant adopts after strip width automatic switchover control model, and the pure water resource of having saved unit, has greatly reduced unit ton steel cost.Having can application value.

Claims (7)

1. a planisher giant cleaning method, for the cleaning to leveling-machine supporting-roller and working roll, it is characterized in that, described planisher comprises the movement speed control method of giant with giant cleaning method: the translational speed control function model of setting up giant: it is the speed of service value of smooth section of backing roll and working roll that the translational speed control function model of described giant adopts enter factor, output variable is the function model of the translational speed of giant, , velocity interval based on smooth section of backing roll of unit and working roll: 10-220M/MIN, first in described velocity interval, set n-1 point, X1-Xn-1=30-220M/MIN, corresponding to described X1-Xn-1=30-220M/MIN scope, by the selected scope of the translational speed Y1-Yn-1 of giant, be: the 30-100% of corresponding described X1-Xn-1 speed, corresponding to the speed Xn=220M/MIN of smooth section of backing roll of described unit and working roll, the translational speed Yn of selected corresponding giant is 100% of described Xn speed.

2. a kind of planisher giant cleaning method as claimed in claim 1, it is characterized in that, scope corresponding to the speed X1-Xn-1 of smooth section of backing roll of unit and working roll, the translational speed Y1-Yn-1 of giant is chosen to be to the percentage range that corresponds to X1-Xn-1 speed is: the speed X1-Xn-1 of smooth section of backing roll of described unit and working roll of take is axis of abscissas, when the percentage that the translational speed Y1-Yn-1 of giant corresponds to X1-Xn-1 speed is axis of ordinates, the scope that the translational speed Y1-Yn-1 of giant corresponds to the percentage range of X1-Xn-1 speed and the speed X1-Xn-1 of smooth section of backing roll of described unit and working roll represents with the inclined degree of angled straight lines.

3. a kind of planisher giant cleaning method as claimed in claim 1 or 2, is characterized in that, the speed based on smooth section of backing roll of unit and working roll: n is 3, and, X1=30M/MIN, X2=90M/MIN, X3=220M/MIN; The Y1-Y3 corresponding to speed X1-X3 scope of smooth section of backing roll of giant and described unit and working roll is chosen to be: 30% of Y1=speed X1,50% of Y2=speed X2,100% of Y3=speed X3.

4. a kind of planisher giant cleaning method as claimed in claim 1, is characterized in that, the speed based on smooth section of backing roll of unit and working roll: n is 4, and, X1=30M/MIN, X2=90M/MIN, X3=170M/MIN, X4=220M/MIN; The corresponding translational speed Y1-Y4 of the speed X1-X4 of smooth section of backing roll of giant and described unit and working roll is chosen to be: 30% of Y1=speed X1,50% of Y2=speed X2,100% of Y3=speed X3,100% of Y4=speed X4.

5. a kind of planisher giant cleaning method as claimed in claim 1, is characterized in that, described giant cleaning method also comprises the Position Control of giant, and its step is as follows:

Giant position set-point calculates:

$\mathrm{POS}\_\mathrm{REF}\_\mathrm{WS}=\frac{\mathrm{TPCAR}\_L}{2}-\frac{W\_\mathrm{STRP}\_\mathrm{SPM}}{2}+\mathrm{ZERO}\_\mathrm{OFFSET}--\left(2\right)$

$\mathrm{POS}\_\mathrm{REF}\_\mathrm{DS}=\frac{\mathrm{TPCAR}\_L}{2}+\frac{W\_\mathrm{STRP}\_\mathrm{SPM}}{2}+\mathrm{ZERO}\_\mathrm{OFFSET}--\left(3\right)$

Wherein:

POS_REF_WS: the Position Control set-point of giant fore side, the limit of fore side of take is spacing is reference coordinate, unit, mm, scope is: 0 to 1800mm;

POS_REF_DS: the Position Control set-point of giant transmission side, the limit of fore side of take is spacing is reference coordinate: scope as: 0 to 1800mm;

TPCAR_L: the stroke that giant is total, this unit is 1800mm;

W_STRP_SPM: the strip width in planisher region, this unit is: 700-1630mm, comes from the data that host computer issues;

ZERO_OFFSET: parameter is adjusted in zero drift, and scope is below 30mm, depends on the side-play amount at planisher place with steel, if there is no side-play amount, value is 0mm.

6. a kind of planisher giant cleaning method as claimed in claim 5, it is characterized in that, with above-mentioned formula (2) and (3), determined after the position set-point of giant fore side and transmission side, when the actual value of giant is less than the position set-point of fore side, send the action command to transmission side, and the set-point that automated location is controlled is simultaneously set as the position set-point of transmission side; When the actual value of giant is greater than the position set-point of transmission side, send the action command to fore side, and the set-point that automated location is controlled is simultaneously set as the position set-point of fore side; Go round and begin again and carry out automated location control.

7. a kind of planisher giant cleaning method as claimed in claim 1, is characterized in that, described method for the specification with steel is: thickness 0.25-2.3mm, width is: 700-1630mm.

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