CN112394678A - Control method for detecting cutting deviation of plate blank - Google Patents
Control method for detecting cutting deviation of plate blank Download PDFInfo
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- CN112394678A CN112394678A CN201910743219.3A CN201910743219A CN112394678A CN 112394678 A CN112394678 A CN 112394678A CN 201910743219 A CN201910743219 A CN 201910743219A CN 112394678 A CN112394678 A CN 112394678A
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- blanks
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- laser ranging
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/16—Plc to applications
- G05B2219/163—Domotique, domestic, home control, automation, smart, intelligent house
Abstract
The invention discloses a control method for detecting cutting deviation of a plate blank, which comprises the following steps: two laser ranging sensors are arranged on one side of the conveying roller way and used for measuring the same sub-blank, and signal processing modules of the two laser ranging sensors are connected with the PLC; setting the distance between the two laser ranging sensors according to the length specification of the sub-blanks cut by the cutting machine; after the cutting machine finishes cutting the sub-blanks, the cutting machine sends a signal of finishing cutting the plate blanks to the upper computer PLC, the rear conveying roller way automatically advances at a low speed, at the moment, the two laser ranging sensors start to measure the distances from the two laser ranging sensors to the edges of the sub-blanks respectively, and the data are transmitted to the PLC for comparison and calculation; if the absolute value of the difference value between the two data is less than or equal to the set value, the sub-blanks are automatically conveyed to the next procedure by the conveying roller way, otherwise, the sub-blanks are judged to be off tracking, and the conveying roller way stops running. The automatic running-out alarming device can automatically stop the roller way and alarm in time at the initial stage of slab deviation, thereby avoiding the expansion of accidents and causing influence on the production of equipment machines.
Description
Technical Field
The invention relates to a plate blank cutting automatic control technology, in particular to a control method for detecting cutting deviation of a plate blank.
Background
As shown in figure 1, a steel enterprise introduces a production line of thick plates with the width of 5m, the steel plate cutting of two tangent lines adopts flame cutting, and is used for cutting a continuous casting incoming stock blank into two or three sub-blanks with fixed length, the length strategy of the steel plate adopts a contact type length measuring roller and a grating, and the cutting precision and the automation degree of the steel plate have certain difference compared with the foreign technology.
At present, when a flame cutting machine of a double tangent line is used for cutting a continuous casting blank, the problem that edge connection is not completely cut off frequently occurs due to poor edge preheating, impurities on the edge of the continuous casting blank and the like. Under the full-automatic state, if the cutting is finished, the plate blank is automatically separated and transmitted, because the edge part is not completely cut off, the first sub blank can be pulled by the second sub blank, so that the two sub blanks are inclined and deviated on the roller way, if an operator does not find out in time that the roller way is manually stopped, the deviated plate blank continues to move forwards more and more, a plurality of facility equipment on the two sides of the roller way are damaged, such as a cooling water pipe of a cutting machine, a roller way-crossing overbridge, a roller way tracking grating, a subsequent deburring machine frame and the like, the equipment is damaged, a production line is stopped, and the safety of walking personnel beside the roller way can be endangered.
In order to avoid the above situation, the currently adopted measures are as follows: when the plate blank is cut, the roller way occupied by the plate blank is switched to a manual mode on an HMI picture by an operator, after the plate blank is cut, the roller way occupied by the first plate blank is manually and slowly started for a short distance, the plate blank is separated after confirmation, the roller way is put into an automatic mode, and the plate blank is automatically transmitted to the next procedure. In actual production, due to the factors of various working contents, limited energy and the like of operators, the switching of a roller way mode is forgotten, and the deviation caused by incomplete cutting of a plate blank occurs again, so that equipment is damaged by collision, and the production is influenced.
Along with the improvement of the automation degree of thick plate production, a means for automatically detecting the deviation state of the plate blank is needed, the roller way can be automatically stopped and alarmed in time at the initial stage of the deviation of the plate blank, and the influence on the production of equipment due to the expansion of accidents is avoided.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a control method for detecting the cutting deviation of a plate blank, which can automatically stop and alarm a roller way in time at the initial stage of the deviation of the plate blank, and avoid the expansion of accidents and the influence on the production of equipment.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method for detecting cutting deviation of a plate blank comprises the following steps:
two laser ranging sensors are arranged at a position 1m away from the edge of the roller way on one side of the conveying roller way, the two laser ranging sensors are used for measuring the same sub-blank, and signal processing modules of the two laser ranging sensors are connected to a PLC system;
setting the distance between two laser ranging sensors to be 1.5m according to the length specification (2600-4700 mm) of a sub-billet cut by the cutting machine and the field installation condition;
after the cutting machine finishes cutting the sub-blanks, the cutting machine sends a signal of finishing cutting the plate blanks to the upper computer PLC, the rear conveying roller way automatically advances at a low speed, at the moment, the two laser ranging sensors start to measure the distances from the two laser ranging sensors to the edges of the sub-blanks respectively, and data are transmitted to the PLC for comparison and calculation;
if the absolute value of the difference value between the two data is less than or equal to the set value, the sub-blanks are automatically conveyed to the next procedure by the conveying roller way, otherwise, the sub-blanks are judged to be off tracking, and the conveying roller way stops running.
The cutting machine sends a signal of completion of slab cutting to the upper computer PLC, if the upper computer PLC receives the signal, the upper computer PLC starts the conveying roller way after waiting for 5s, and if not, the upper computer PLC continues to wait for the signal.
The upper computer PLC starts the conveying roller way to move forward at the speed of 0.25m/s and feeds back a speed signal to the upper computer PLC, the upper computer PLC starts the two laser ranging sensors to start ranging after receiving the feedback signal, and if not, the upper computer PLC continues to wait for the speed feedback signal.
The PLC carries out comparison calculation according to the following formula:
∣d1-d2∣≤L×tanα
in the above formula, d1 is the distance between the edge portions of the sub-blanks detected by one laser ranging sensor, d2 is the distance between the edge portions of the sub-blanks detected by the other laser ranging sensor, L is the distance between the two laser ranging sensors, and alpha is the deviation angle of the sub-blanks to be detected.
And the PLC judges the deviation of the sub-slabs, the conveying roller way stops running, the slab is manually adjusted by an operator to be cut again, and the slab is automatically conveyed to the next procedure after being completely cut off.
The PLC is a Siemens S7-400 controller.
The CPU adopted by the Siemens S7-400 controller is the CPU416-2 DP.
The signal processing module is an SM321 digital quantity input module and an SM331 analog quantity input module.
The arithmetic unit of the PLC comprises a SUB module, an MUL module, an ABS module and a CMP module.
The control method for detecting the cutting deviation of the plate blank can realize automatic blank distribution of the cut sub-blank, detect the state of the plate blank in real time, and avoid the occurrence of production safety accidents of equipment damage machines caused by negligence in manual operation, thereby improving the automation degree and the production efficiency of secondary cutting of the plate blank.
Drawings
FIG. 1 is a schematic diagram of a cutting sub-blank deviation condition of a conventional cutting machine;
FIG. 2 is a schematic diagram of a control method of the present invention;
fig. 3 is a flowchart of the control method of the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
Referring to fig. 2 to 3, a control method for detecting cutting deviation of a slab according to the present invention includes:
the sensor support 1 is arranged on the ground parallel to the central line of the first conveying roller way 2 and 1m away from the edge of the roller way, the height of the sensor support 1 is 5cm higher than the level of the first conveying roller way 2, and the two laser sensors 3 and 4 are arranged at the left end and the right end of the sensor support 1 at a distance of 1.5 m. When the two laser sensors 3 and 4 are installed, the two laser sensors are required to be on the same horizontal plane, the photoelectric connecting line which is printed on the plate blank is required to be parallel to the plane and the central line of the first conveying roller way 2, and other detection tools are used for assisting installation during installation.
When the slab enters the cutting machine area and shields the two laser sensors 3 and 4, the two laser sensors 3 and 4 both have jump data, the jump value jumps to a distance value infinitely, and the distance value is uploaded to the PLC and stored in a program data block. After the slab cutting is finished, the cutting machine sends a ' slab cutting finishing ' signal and ' the running of the first conveying roller way 2 ' and ' the signal to the PLC as a trigger condition, the distance value of the two laser sensors 3 and 4 is taken to calculate the slab deviation angle alpha, the deviation angle alpha is determined according to the actual situation on site, if the deviation angle alpha is greater than 5 degrees, the slab is considered to be dragged and deviated, the equipment damage risk can be caused, the determined alpha is less than or equal to 5 degrees, and the calculation formula is as follows:
∣d1-d2∣≤L×tanα
in the above formula, d1 is the distance between the edge portions of the sub-blanks detected by the laser ranging sensor 3, d2 is the distance between the edge portions of the sub-blanks detected by the laser ranging sensor 4, L is the distance between the two laser ranging sensors 3 and 4, and α is the deviation angle of the sub-blanks to be detected.
Namely, the absolute value of the error of the two laser ranging sensors 3 and 4 exceeds 13cm, the slab is considered to be deviated, the first conveying roller bed 2 is forbidden to automatically operate and jump into a manual mode, meanwhile, an alarm signal appears on an operation picture, an operator is required to manually confirm the slab cutting condition on site, if the deviation is caused by incomplete cutting, a cutter needs to be manually controlled to carry out cutter supplementing treatment, and after the treatment is finished, the first conveying roller bed 2 is put into the automatic mode to convey the slab and waits for the next slab.
Preferably, the PLC is a Siemens S7-400 controller, the adopted CPU is a CPU416-2DP, and the signal processing modules are an SM321 digital input module and an SM331 analog input module.
Preferably, the PLC arithmetic unit includes a SUB module (subtraction module), a MUL module (multiplication module), an ABS module (absolute value module), and a CMP module (comparison module).
Preferably, the laser ranging sensors 3 and 4 are of type DT35-15551 of SICK corporation.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (9)
1. A control method for detecting cutting deviation of a plate blank is characterized by comprising the following steps:
two laser ranging sensors are arranged on one side of the conveying roller way and used for measuring the same sub-blank, and signal processing modules of the two laser ranging sensors are connected to a PLC system;
setting the distance between the two laser ranging sensors according to the length specification and the field installation condition of the sub-blanks cut by the cutting machine;
after the cutting machine finishes cutting the sub-blanks, the cutting machine sends a signal of finishing cutting the plate blanks to the upper computer PLC, the rear conveying roller way automatically advances at a low speed, at the moment, the two laser ranging sensors start to measure the distances from the two laser ranging sensors to the edges of the sub-blanks respectively, and data are transmitted to the PLC for comparison and calculation;
if the absolute value of the difference value between the two data is less than or equal to the set value, the sub-blanks are automatically conveyed to the next procedure by the conveying roller way, otherwise, the sub-blanks are judged to be off tracking, and the conveying roller way stops running.
2. The control method for detecting the cutting deviation of the slab as claimed in claim 1, characterized in that: the cutting machine sends a signal of completion of slab cutting to the upper computer PLC, if the upper computer PLC receives the signal, the upper computer PLC starts the conveying roller way after waiting for 5s, and if not, the upper computer PLC continues to wait for the signal.
3. The control method for detecting the cutting off-tracking of the slab as claimed in claim 2, characterized in that: the upper computer PLC starts the conveying roller way to move forward at the speed of 0.25m/s and feeds back a speed signal to the upper computer PLC, the upper computer PLC starts the two laser ranging sensors to start ranging after receiving the feedback signal, and if not, the upper computer PLC continues to wait for the speed feedback signal.
4. The control method for detecting the cutting deviation of the slab as claimed in claim 1, characterized in that: the PLC carries out comparison calculation according to the following formula:
∣d1-d2∣≤L×tanα
in the above formula, d1 is the distance between the edge portions of the sub-blanks detected by one laser ranging sensor, d2 is the distance between the edge portions of the sub-blanks detected by the other laser ranging sensor, L is the distance between the two laser ranging sensors, and alpha is the deviation angle of the sub-blanks to be detected.
5. The control method for detecting the cutting deviation of the slab as claimed in claim 1, characterized in that: and the PLC judges the deviation of the sub-slabs, the conveying roller way stops running, the slab is manually adjusted by an operator to be cut again, and the slab is automatically conveyed to the next procedure after being completely cut off.
6. The control method for detecting the cutting deviation of the slab as claimed in claim 1, characterized in that: the PLC is a Siemens S7-400 controller.
7. The control method for detecting the cutting deviation of the slab as claimed in claim 6, characterized in that: the CPU adopted by the Siemens S7-400 controller is the CPU416-2 DP.
8. The control method for detecting the cutting deviation of the slab as claimed in claim 1, characterized in that: the signal processing module is an SM321 digital quantity input module and an SM331 analog quantity input module.
9. The control method for detecting the cutting deviation of the slab as claimed in claim 6, characterized in that: the arithmetic unit of the PLC comprises a SUB module, an MUL module, an ABS module and a CMP module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910743219.3A CN112394678A (en) | 2019-08-13 | 2019-08-13 | Control method for detecting cutting deviation of plate blank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910743219.3A CN112394678A (en) | 2019-08-13 | 2019-08-13 | Control method for detecting cutting deviation of plate blank |
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| CN112394678A true CN112394678A (en) | 2021-02-23 |
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| CN201910743219.3A Pending CN112394678A (en) | 2019-08-13 | 2019-08-13 | Control method for detecting cutting deviation of plate blank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639672A (en) * | 2021-08-12 | 2021-11-12 | 宝武集团马钢轨交材料科技有限公司 | Automatic measuring system and method for angular deviation of steel billet saw cutting surface |
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| CN202015875U (en) * | 2010-11-17 | 2011-10-26 | 株式会社凯斯技术 | Rod material conveying apparatus for rod material shearing machine |
| CN202049231U (en) * | 2011-01-27 | 2011-11-23 | 宝山钢铁股份有限公司 | Hot rolling roller way plate blank inclination detector applicable to plate blank crane |
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2019
- 2019-08-13 CN CN201910743219.3A patent/CN112394678A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007079837A (en) * | 2005-09-13 | 2007-03-29 | Sumitomo Heavy Ind Ltd | Head operation controller, control method and stage device |
| CN202015875U (en) * | 2010-11-17 | 2011-10-26 | 株式会社凯斯技术 | Rod material conveying apparatus for rod material shearing machine |
| CN202049231U (en) * | 2011-01-27 | 2011-11-23 | 宝山钢铁股份有限公司 | Hot rolling roller way plate blank inclination detector applicable to plate blank crane |
| CN202910080U (en) * | 2012-10-30 | 2013-05-01 | 鞍钢股份有限公司 | Continuous casting hot plate base on-line deviation-correction device |
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| CN107790660A (en) * | 2016-08-30 | 2018-03-13 | 上海梅山钢铁股份有限公司 | A kind of continuous casting billet length accurate measurement method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639672A (en) * | 2021-08-12 | 2021-11-12 | 宝武集团马钢轨交材料科技有限公司 | Automatic measuring system and method for angular deviation of steel billet saw cutting surface |
| CN113639672B (en) * | 2021-08-12 | 2023-11-14 | 宝武集团马钢轨交材料科技有限公司 | Automatic measuring system and measuring method for angle deviation of saw cut surface of billet |
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Application publication date: 20210223 |