CN104308023A - Bilateral scissors pinch roll step length control method - Google Patents
Bilateral scissors pinch roll step length control method Download PDFInfo
- Publication number
- CN104308023A CN104308023A CN201410528635.9A CN201410528635A CN104308023A CN 104308023 A CN104308023 A CN 104308023A CN 201410528635 A CN201410528635 A CN 201410528635A CN 104308023 A CN104308023 A CN 104308023A
- Authority
- CN
- China
- Prior art keywords
- pinch roll
- time
- control method
- roll
- speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/08—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers
- B21D43/09—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers by one or more pairs of rollers for feeding sheet or strip material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
- B23D15/06—Sheet shears
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Abstract
The invention discloses a bilateral scissors pinch roll step length control method. The bilateral scissors pinch roll step length control method comprises the following steps that A, given data of a pinch roll step length LP and a shearing speed V are sent to a PLC (Programmable Logic Controller); B, triangular slope time Tr that a pinch roll speed is increased from 0 to V is calculated by the PLC control module according to the given pinch roll step length of a pinch roll and the speed V; C, a pinch roll main driver receives the triangular slope time Tr in real time by communication of a PROFIBUS; D, the pinch roll main driver sends a current following given signal to a secondary driver; E, the pinch roll main driver controls a motor to circularly start and stop according to the triangular slope time Tr, and steel plate shearing is implemented. The bilateral scissors pinch roll step length control method has the advantages that the method is simple, the stability is good, the condition that the pinch roll step length is changed due to inaccuracy of counting since a coder is subjected to external disturbance is weakened, and the practicability is strong.
Description
Technical field
The present invention relates to a kind of bilateral scissors shearing property technology, more particularly, relate to a kind of Double-side-shearing pinch roll step size control method.
Background technology
Bilateral scissors are the visual plants in heavy and medium plate mill cutting operation, whole bilateral scissors unit is cut by main, pinch roll, frame is traversing, rollgang, knife-edge gap adjusts, the equipment compositions such as slitter edge collection, and pinch roll controls to be the key component affecting shearing quality in whole bilateral scissors unit, pinch roll is distributed in the arrival end of bilateral scissors both sides and port of export fixation side and mobile side two to front pinch roll and two to rear pinch roll, the effect of pinch roll is that roller paired is up and down clamped steel plate, by the given instruction loop start of step-length and stopping, steel plate is sent into shearing steel plate two longitudinal edge in bilateral scissors.
Double-side-shearing pinch roll step size controlling adopts the most popular control method by encoder pulse count at present, high speed counting module is changed, PLC programming realizes, because encoder is high by site environment temperature at work, the impact of the factor such as mechanical oscillation and repeat count, easily there is deviation in counting, actual step size is neglected long suddenly short, uncontrollable in setting value, the instability of pinch roll step-length causes punching in shear process, sideslip, the sheared deficit such as misalignment, therefore pinch roll step-length is not controlled has had a strong impact on steel plate shearing lumber recovery and rhythm of production, and be a large crux of puzzlement heavy and medium plate mill shear line always.
In view of this, seek a kind of Double-side-shearing pinch roll step size control method and become pursuing a goal of these those skilled in the art.
Summary of the invention
In view of the foregoing defects the prior art has, the invention provides a kind of Double-side-shearing pinch roll step size control method, can not be forbidden to make pinch roll step-length suddenly long suddenly short because of encoder to count, the invention reside in weaken and rely on encoder pulse count control mode, disclose a kind of pinch roll step-length and equal the domatic long-pending control method of triangular aslant that time shaft and velocity wave form surround, can accurately control to send plate pinch roll step-length, it is practical.
For achieving the above object, the present invention adopts following technical scheme: a kind of Double-side-shearing pinch roll step size control method, and its step is as follows successively:
A, pinch roll step-length L
ppLC is issued to shear rate V data-oriented;
B, PLC control module is according to the given pinch roll step-length L of pinch roll
ppinch roll speed to increase to V triangle ramp time T by 0 is calculated with speed V
r;
C, pinch roll master driver are by PROFIBUS field bus communication real-time reception triangle ramp time T
r;
D, pinch roll master driver send current following Setting signal to from driver;
E, pinch roll master driver control motor and press triangle ramp time T
rloop start and stopping, and implement steel plate shearing.
Further, the pinch roll step-length L of described steps A
pequal the triangle area S that time shaft and triangle slope velocity wave form enclose, i.e. L
p=S=1/2 × 2T
s× V.
Further, described step C triangle ramp time T
r, according to formula T
r=1500 × T
s/ V
m=1500 × T
s/ 738.5379 × L
p=2.031 × T
s/ L
pcalculate.
Further, described triangle ramp time T
rfor pinch roll master driver digitlization parameter ramp up time P303 or fall time P304 value.
Further, for making pinch roll step size controlling keep stable, as long as triangular aslant slope area equation when guarantee pinch roll motor starts at every turn, that is: S
1=S
2=S
3=S
n, how the slope of no matter how rising and declining changes, and pinch roll step-length is all the same.Apply this principle, we just can by changing ramp time and sending plate time 2T
sdetermine pinch roll step-length.Conversely, after sending plate time and pinch roll step-length to determine, then triangle ramp time T can be calculated
r.
Therefore, as long as send plate time and pinch roll step-length to determine, ramp up time P303 and the ramp-down time P304 of pinch roll master driver speed regulator will determine according to computing formula thereupon, thus effectively control pinch roll step-length.
Compared with prior art, having following good effect is, Double-side-shearing pinch roll step size control method of the present invention controls simple, good stability, and weaken because encoder is forbidden by external disturbance occurrence count and change pinch roll step-length, it is practical.
Below in conjunction with drawings and Examples, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is pinch roll distribution map.
Fig. 2 is pinch roll " master-slave control " connection layout.
Fig. 3 is the calculating schematic diagram of pinch roll step-length.
Fig. 4 is flow chart of the present invention.
Detailed description of the invention
As shown in Figure 1, bilateral scissors equipment comprises that entrance moves side top roll, entrance moves side lower roll, entrance fixation side top roll, entrance fixation side lower roll, export mobile side top roll, export mobile side lower roll, outlet fixation side top roll and outlet fixation side lower roll, the each correspondence of above-mentioned eight cover pinch roll is provided with the motor of pinch roll belonging to a driving, control as target with the motor in synchrony of above-mentioned eight cover pinch rolls, adopt " master-slave control " to the motor of described eight cover pinch rolls, data transmit and adopt device to device communication mode.
Eight cover pinch rolls adopt DC motor Driver, and DC driver adopts the 6RA70 whole digit DC speed variable system with the Siemens company of modular construction.Wherein, described speed regulator is provided with and sends terminal 56, sends terminal 57, receiving terminal 58 and receiving terminal 59.
As shown in Figure 2, as a preferred version, move side top roll, entrance fixation side top roll at entrance, export mobile side top roll and outlet fixation side top roll and press down entrance and move side lower roll, entrance fixation side lower roll, export mobile side lower roll and outlet fixation side lower roll when sending plate work, have employed the control mode of " lead seven from ".Using outlet fixation side lower roll as master driver; Entrance moves side top roll, entrance moves side lower roll, entrance fixation side top roll, entrance fixation side lower roll, export mobile side top roll, export mobile side lower roll and outlet fixation side top roll as from driver, master driver is that speed current double closed-loop controls, and all the other seven is current tracking control from driver.
Particularly, the transmission terminal 56 exporting the speed regulator of fixation side lower roll connects the receiving terminal 58 of the speed regulator of entrance fixation side lower roll respectively, export the receiving terminal 58 of the speed regulator of mobile side lower roll, export the receiving terminal 58 of the speed regulator of fixation side top roll and export the receiving terminal 58 of speed regulator of mobile side top roll; The transmission terminal 57 of the speed regulator of outlet fixation side lower roll connects respectively the speed regulator of entrance fixation side lower roll receiving terminal 59, export the speed regulator of mobile side lower roll receiving terminal 59, export the receiving terminal 59 of the speed regulator of fixation side top roll and export the receiving terminal 59 of speed regulator of mobile side top roll; The transmission terminal 56 of the speed regulator of entrance fixation side lower roll connects entrance respectively and moves the receiving terminal 58 that the receiving terminal 58 of the speed regulator of side lower roll, the receiving terminal 58 of the speed regulator of entrance fixation side top roll and entrance move the speed regulator of side top roll; The transmission terminal 57 of the speed regulator of entrance fixation side lower roll connects entrance respectively and moves the receiving terminal 59 that the receiving terminal 59 of the speed regulator of side lower roll, the receiving terminal 59 of the speed regulator of entrance fixation side top roll and entrance move the speed regulator of side top roll.As the outlet fixation side lower roll of master driver, its speed regulator sends speed-regulating signals to as from the entrance fixation side lower roll of driver, totally four speed regulators of exporting mobile side lower roll, outlet fixation side top roll and exporting mobile side top roll, directly to control this four speed from driver, and this speed-regulating signal is sent to other three from driver by entrance fixation side lower roll simultaneously, it is respectively entrance and moves side lower roll, entrance fixation side top roll and entrance and move side top roll, indirectly to control this three speed from driver.
In like manner, as another preferred version, entrance move side top roll and entrance fixation side top roll depress entrance move side lower roll and entrance fixation side lower roll send separately plate to work time, have employed the control mode of " main three from ": using entrance fixation side lower roll as master driver; Entrance moves side lower roll, entrance fixation side top roll and entrance and moves side top roll as from driver, and master driver is that speed current double closed-loop controls, and its excess-three platform is from driver current model-following control.
In like manner, as another preferred version, side top roll is moved and entrance fixation side top roll lifts at entrance, export mobile side top roll and outlet fixation side top roll pressure outlet mobile side lower roll and outlet fixation side lower roll when sending separately plate to work, have employed the control mode of " main three from ", using outlet fixation side lower roll as master driver, exporting mobile side top roll, outlet fixation side top roll and exporting mobile side lower roll is from driver, master driver is that speed current double closed-loop controls, and its excess-three platform is from driver current model-following control.
In pinch roll motor control module, employ the parameter that SFC14 and SFC15 carrys out real time modifying driver, the data of this part refers to the explanation of S7-400 Programmable Logic Controller SFC14, SFC15 systemic-function.
According to the technological process that bilateral scissors are sheared, FC40 is the technical module that process controls pinch roll startup by certain requirement, stops.Below be described further:
As shown in Figure 3 and Figure 4, pinch roll step-length is exactly the linear velocity that motor drives pinch roll running, top pinch roll and bottom pinch roll steel plate clamping from start to stop steel plate walking distance be exactly pinch roll step-length.Pinch roll step-length equals the area that time shaft and velocity wave form enclose, and area S equals pinch roll step-length L
p.That is: L
p=S---------(1)
For making each pinch roll step-length consistent, as long as triangular aslant slope area equation when guarantee pinch roll motor starts at every turn, that is: S
1=S
2=S
3=S
n, no matter the flex point of speed is at which time point, and pinch roll step-length is all the same.Apply this principle, we just can pass through change the rising of velocity wave form area and the ramp time of decline and send plate time 2T
sdetermine actual pinch roll step-length.Conversely, send plate time and pinch roll step-length if known, then can calculate the rising of velocity wave form area and the ramp time of decline.
For 6RA70 driver, the rising of waveform area and the ramp time of decline and speed preset have following relation:
V≤V
rthen: T
s/ V
m=T
r/ V
r---------(2)
V≤V
rthen T
s/ V
m=T
r/ V----------(3)
Correspond to pinch roll motor, V
r=1500 revs/min.Have:
V≤1500 rev/min, then: T
s/ V
m=T
r/ 1500---------(4)
V≤1500 rev/min, then: T
s/ V
m=T
r/ V----------(5)
In formula: V is given speed, V
rfor the Rated motor speed of 6RA70 setting, T
rfor the value of P303 or P304, T
sfor the speed preset time, V
mfor actual speed.
The parameter of pinch roll is as follows: stroke speed-up ratio i=25.91; Pinch roll diameter Φ=670 millimeter.
Pinch roll speed V (meter per second) and motor speed V
m(rev/min) has following relation:
V＝V
M/60×0.67∏/25.91----------(6)
Time setting slope risen and decline is equal, by pinch roll step size computation formula L
p=S can obtain:
L
P＝S＝1/2×2T
S×V----------(7)
That is: L
p=1/2 × 2T
s× V
m/ 60 × 0.67 ∏/25.91--------------(8)
Can obtain: V
m=738.5379 × L
p/ T
s-------------(9)
Work as V
mwhen≤1500 revs/min, speed preset is fixed as 1500 revs/min; Work as V
m≤ 1500 revs/min, speed preset is V
m.
Can be obtained by formula (4), formula (5) and formula (9):
1) V
m=738.5379 × L
p/ T
swhen≤1500 revs/min, V
s=1500 revs/min,
T
r＝1500×T
S/V
M＝1500×T
S/738.5379×L
P＝2.031×T
S/L
P
2) V
m=738.5379 × L
p/ T
swhen≤1500 revs/min, V
s=V
m, T
r=T
s
In formula: V
sfor speed preset (K3002); T
rfor ramp up time P303 or fall time P304; L
pfor pinch roll step-length.
Therefore, a kind of Double-side-shearing pinch roll step size control method of the present invention, its step is as follows successively:
A, pinch roll step-length L
ppLC is issued to shear rate V data-oriented;
B, PLC control module is according to the given pinch roll step-length L of pinch roll
ppinch roll speed to increase to V triangle ramp time T by 0 is calculated with speed V
r;
C, pinch roll master driver are by PROFIBUS field bus communication real-time reception triangle ramp time T
r;
D, pinch roll master driver send given value of current signal to from driver;
E, pinch roll master driver control motor and press triangle ramp time T
rloop start and stopping, and implement steel plate shearing.
Adopt control method of the present invention, avoid because encoder causes pinch roll pinch roll step-length unstable by outside many factors interference, in practical operation, operating personnel select different pinch roll step-length and send the plate time, in pinch roll driver, ramp time is not identical yet, it is practical, is particularly useful for cut deal enterprise.
The present invention is not limited to above-mentioned embodiment, if do not depart from the spirit and scope of the present invention to various change of the present invention or modification, if these are changed and modification belongs within claim of the present invention and equivalent technologies scope, then the present invention is also intended to comprise these change and modification.
Claims (4)
1. a Double-side-shearing pinch roll step size control method, is characterized in that, its step is as follows successively:
A, pinch roll step-length L
ppLC is issued to shear rate V data-oriented;
B, PLC control module according to pinch roll to fixed step size L
ppinch roll speed to increase to V triangle ramp time T by 0 is calculated with speed V
r;
C, pinch roll master driver are by PROFIBUS field bus communication real-time reception triangle ramp time T
r;
D, pinch roll master driver send current following Setting signal to from driver;
E, pinch roll master driver control motor and press triangle ramp time T
rloop start and stopping, and implement steel plate shearing.
2. Double-side-shearing pinch roll step size control method as claimed in claim 1, is characterized in that: the pinch roll step-length L of described steps A
pequal the triangle area S that time shaft and triangle slope velocity wave form enclose, i.e. L
p=S=1/2 × 2T
s× V.
3. Double-side-shearing pinch roll step size control method as claimed in claim 1, is characterized in that: described step C triangle ramp time T
r, according to formula T
r=1500 × T
s/ V
m=1500 × T
s/ 738.5379 × L
p=2.031 × T
s/ L
pcalculate.
4. Double-side-shearing pinch roll step size control method as claimed in claim 1, is characterized in that: described triangle ramp time T
rfor pinch roll master driver digitlization parameter ramp up time P303 or fall time P304 value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410528635.9A CN104308023A (en) | 2014-10-09 | 2014-10-09 | Bilateral scissors pinch roll step length control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410528635.9A CN104308023A (en) | 2014-10-09 | 2014-10-09 | Bilateral scissors pinch roll step length control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104308023A true CN104308023A (en) | 2015-01-28 |
Family
ID=52363412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410528635.9A Pending CN104308023A (en) | 2014-10-09 | 2014-10-09 | Bilateral scissors pinch roll step length control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104841697A (en) * | 2015-05-15 | 2015-08-19 | 南京钢铁股份有限公司 | Control method for automatically preventing steel plate from deflection in shearing process of bilateral scissors |
| CN113102828A (en) * | 2021-04-21 | 2021-07-13 | 北京首钢自动化信息技术有限公司 | Method and device for controlling oil pressure of pinch roll hydraulic valve table of double-sided shear |
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| CN103537750A (en) * | 2012-07-17 | 2014-01-29 | 宝山钢铁股份有限公司 | Cutting control method for rolling-cutting type bilateral scissors |
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2014
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| CN101642826A (en) * | 2009-05-31 | 2010-02-10 | 北京中机联供非晶科技股份有限公司 | Numerical control amorphous steel band shearing machine |
| KR20120074431A (en) * | 2010-12-28 | 2012-07-06 | 주식회사 포스코 | Twin roll casting process for improving shape of strip top part |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104841697A (en) * | 2015-05-15 | 2015-08-19 | 南京钢铁股份有限公司 | Control method for automatically preventing steel plate from deflection in shearing process of bilateral scissors |
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| CN113102828A (en) * | 2021-04-21 | 2021-07-13 | 北京首钢自动化信息技术有限公司 | Method and device for controlling oil pressure of pinch roll hydraulic valve table of double-sided shear |
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Application publication date: 20150128 |
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