CN111266545A - Method for replacing manual regulation of casting speed of continuous casting machine by HMI input setting - Google Patents
Method for replacing manual regulation of casting speed of continuous casting machine by HMI input setting Download PDFInfo
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- CN111266545A CN111266545A CN202010116228.2A CN202010116228A CN111266545A CN 111266545 A CN111266545 A CN 111266545A CN 202010116228 A CN202010116228 A CN 202010116228A CN 111266545 A CN111266545 A CN 111266545A
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- hmi
- speed
- potentiometer
- picture
- adjustment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
Abstract
The invention relates to a method for replacing manual adjustment by HMI input setting of the casting speed of a continuous casting machine, belonging to the technical field of continuous casting equipment in the metallurgical industry. The technical scheme is as follows: editing and manufacturing an HMI (human machine interface) picture, and adding a pull speed adjusting sub-picture on the HMI picture; after the picture is made, defining variables, and carrying out program design and test; the HMI inputs a set pull-up speed value to replace a manual potentiometer to adjust the pull-up speed. The invention has the beneficial effects that: the resistance change of the potentiometer caused by the external temperature change, abrasion and dirt between the slider and the variable resistor is avoided; the HMI speed control is adopted to control the operation more simply and conveniently, the adjustment range and the upper and lower limit values can be modified properly, and the hidden troubles that the blank quality is influenced by production interruption and unstable adjustment of the potentiometer due to abnormal damage of the potentiometer are completely eliminated.
Description
Technical Field
The invention relates to a method for replacing manual adjustment by HMI input setting of the casting speed of a continuous casting machine, belonging to the technical field of continuous casting equipment in the metallurgical industry.
Background
The casting speed of the continuous casting machine is the speed of a casting blank pulled out of the crystallizer by the dummy bar. Generally, the concentration is 1m/min to 4 m/min. The drawing speed determines the production efficiency of the continuous casting machine. The stability of the pulling rate determines the quality of the product. The conventional pull-up control usually adopts a potentiometer for manual adjustment, the potentiometer is a component for adjusting the pull-up speed, and the potentiometer (or voltage), also called "dots" or variable resistor, the pull-up control principle of the continuous casting machine is also based on the potentiometer having a voltage dividing function to adjust the pull-up speed, and the potentiometer outputs a voltage value which is proportional to the position of the slider along the variable resistor. The potentiometer has too low accuracy because of the resistance variations caused by temperature variations, wear and dirt between the slider and the variable resistor, which affect the accuracy of the potentiometer. In the production process, liquid level fluctuation is often caused by unstable drawing speed, great threat is brought to the stability of a continuous casting machine, great influence is also generated on the quality of products, and unnecessary maintenance work is also brought.
The potentiometer is basically introduced:
referring to fig. 1, the potentiometer is a resistor element with three terminals and a resistance value adjustable according to a certain variation rule. Potentiometers are generally composed of a resistive body and a movable brush. When the brush moves along the resistor, a resistance value or a voltage having a certain relation with the displacement is obtained at the output end. The potentiometer can be used as a three-terminal device or a two-terminal device. The latter may be regarded as a variable resistor.
The potentiometer is used for adjusting the voltage (including direct current voltage and signal voltage) and the current.
The potentiometer has the structural characteristics that the resistor body has two fixed ends, and the position of the movable contact on the resistor body is changed by manually adjusting the rotating shaft or the sliding handle, so that the resistance value between the movable contact and any one of the fixed ends is changed, and the voltage and the current are changed.
A potentiometer is an adjustable electronic component. It is composed of a resistor body and a rotating or sliding system. When a voltage is applied between two fixed contacts of the resistor body, the position of the contact on the resistor body is changed by a rotating or sliding system, and a voltage which has a certain relation with the position of the moving contact can be obtained between the moving contact and the fixed contact. It is mostly used as a voltage divider, when the potentiometer is a four-terminal element. The potentiometer is basically a variable resistor for voltage division. On the exposed resistor body, one to two movable metal contacts are pressed. The contact location determines the resistance between either end of the resistor and the contact. Winding according to the material, carbon film, solid potentiometer; the linear potentiometer (in linear relation) and the function potentiometer (in curve relation) are divided according to the relation between the output voltage ratio and the input voltage ratio and the rotation angle.
Mechanical life of the potentiometer:
the mechanical life of a potentiometer, also known as wear life, is often expressed in terms of mechanical durability. Mechanical durability refers to the total number of reliable movements of the movable contact of a potentiometer under specified test conditions, commonly referred to as "cycles". The mechanical life is related to the type, structure, material and manufacturing process of the potentiometer, and the difference is quite large.
Disclosure of Invention
The invention aims to provide a method for replacing manual regulation by HMI input setting of the casting speed of a continuous casting machine, which replaces the traditional manual potentiometer regulation by HMI input setting of the casting speed of the continuous casting machine, thereby avoiding the influence on the precision of a potentiometer caused by the resistance change of the potentiometer due to the external temperature change, abrasion and dirt between a slider and a variable resistor, thereby causing the liquid level fluctuation caused by unstable pulling speed in the production process, the influence on the quality of products, the production interruption caused in serious cases and the unnecessary maintenance work caused by serious production interruption; the control operation is simpler and more convenient by adopting the HMI, the adjustment range and the upper and lower limit values can be properly modified, the requirements on the product quality and the process operation are greatly met, the control device related to the pulling speed is not required to be maintained, the maintenance cost is reduced, the hidden danger that the blank quality is influenced by the production interruption and the unstable adjustment of the potentiometer caused by the abnormal damage of the potentiometer is completely eliminated, and the problems in the background technology are effectively solved.
The technical scheme of the invention is as follows: the method for setting the casting speed of the continuous casting machine by HMI input to replace manual regulation comprises the following steps: (1) editing and manufacturing an HMI (human machine interface) picture, and adding a pull speed adjusting sub-picture on the HMI picture; (2) after the picture is made, defining variables, and carrying out program design and test; (3) the HMI inputs a set pull-up speed value to replace a manual potentiometer to adjust the pull-up speed.
In the step (3), a set pulling speed value is input by an HMI (human machine interface) to be used as standby HMI pulling speed control for potentiometer adjustment, when the potentiometer fails, the HMI is switched to adjust the pulling speed in the first time, and the last normal pulling speed set value (stored in a program) is used as an initial value for pulling speed adjustment, so that the problem of blank quality caused by sudden change of the pulling speed in the production process is avoided, an operator can adjust the pulling speed according to the production rhythm and the temperature of molten steel, and the adjustment range and the upper and lower limit values can be modified.
In the step (3), a set pulling speed value is input by an HMI (human machine interface) to be used as HMI pulling speed control for completely cancelling potentiometer adjustment, when the potentiometer adjustment is cancelled, the pulling speed adjustment is carried out by an operator according to the production rhythm and the temperature of molten steel from the start of automatic casting of the casting machine to the stop of casting of a tail billet, and the adjustment range and the upper and lower limit values can be modified.
The invention has the beneficial effects that: the casting speed of the continuous casting machine is input and set by an HMI instead of the traditional manual potentiometer adjustment, so that the influence on the precision of the potentiometer caused by the resistance change of the potentiometer due to the external temperature change, abrasion and dirt between a slider and a variable resistor is avoided, the liquid level fluctuation caused by unstable pulling speed in the production process is avoided, the influence on the quality of products is caused, the production interruption is caused in serious cases, and unnecessary maintenance work is caused; the control operation is simpler and more convenient by adopting the HMI, the adjustment range and the upper and lower limit values can be properly modified, the requirements on the product quality and the process operation are greatly met, the control device related to the pulling speed is not required to be maintained, the maintenance cost is reduced, and the hidden danger that the blank quality is influenced by the production interruption and the unstable adjustment of the potentiometer caused by the abnormal damage of the potentiometer is completely eliminated.
Drawings
FIG. 1 is an interface diagram for HMI screen editing and authoring of the present invention;
FIG. 2 is an interface diagram defined by the variables of the present invention;
FIG. 3 is a picture of the drawing speed of the continuous casting machine of the present invention being adjusted by inputting a set drawing speed value instead of a manual potentiometer by an HMI during the production process.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the drawings of the embodiments, and it is obvious that the described embodiments are a small part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
The method for setting the casting speed of the continuous casting machine by HMI input to replace manual regulation comprises the following steps: (1) editing and manufacturing an HMI (human machine interface) picture, and adding a pull speed adjusting sub-picture on the HMI picture; (2) after the picture is made, defining variables, and carrying out program design and test; (3) the HMI inputs a set pull-up speed value to replace a manual potentiometer to adjust the pull-up speed.
In the step (3), a set pulling speed value is input by an HMI (human machine interface) to be used as standby HMI pulling speed control for potentiometer adjustment, when the potentiometer fails, the HMI is switched to adjust the pulling speed in the first time, and the last normal pulling speed set value (stored in a program) is used as an initial value for pulling speed adjustment, so that the problem of blank quality caused by sudden change of the pulling speed in the production process is avoided, an operator can adjust the pulling speed according to the production rhythm and the temperature of molten steel, and the adjustment range and the upper and lower limit values can be modified.
In the step (3), a set pulling speed value is input by an HMI (human machine interface) to be used as HMI pulling speed control for completely cancelling potentiometer adjustment, when the potentiometer adjustment is cancelled, the pulling speed adjustment is carried out by an operator according to the production rhythm and the temperature of molten steel from the start of automatic casting of the casting machine to the stop of casting of a tail billet, and the adjustment range and the upper and lower limit values can be modified.
And adding a pulling speed regulation sub-picture on the HMI picture, wherein the first mode is used for standby HMI pulling speed control of potentiometer regulation, when the potentiometer fails, the pulling speed is switched to the HMI to regulate the pulling speed in the first time, and the last normal pulling speed set value (stored in a program) is used as an initial value of the pulling speed regulation, so that the problem of blank quality caused by sudden change of the pulling speed in the production process is avoided, then an operator can regulate the pulling speed according to the production rhythm and the molten steel temperature, and the regulation amplitude and the upper and lower limit values can be modified. The second mode is HMI casting speed control for completely canceling potentiometer adjustment, when the potentiometer adjustment is canceled, the casting speed is adjusted by an operator according to the production rhythm and the molten steel temperature from the start of automatic casting of a casting machine to the stop of casting of a tail billet, and the adjustment range and the upper and lower limit values can be modified.
In practical application, HMI pictures are edited and produced, after the pictures are produced, variables are defined, and programming and testing are carried out, and the HMI pictures are applied to production for verification.
After the picture is made, the variables are defined as follows:
the set pull-up speed value of the original potentiometer is PIW988
Selecting frame to set pulling speed DB120.DBX62.1
Setting the pull rate value DB120.DBD26 on the picture
M690.6 for set pull-up speed confirm button
FC99 conversion function block for real type and word
MW418 is the final pull rate set point.
The invention aims to set the casting speed of a continuous casting machine by HMI input to replace the traditional manual potentiometer adjustment, thereby avoiding the influence on the precision of the potentiometer caused by the resistance change of the potentiometer due to the external temperature change, abrasion and dirt between a slider and a variable resistor, further causing the liquid level fluctuation caused by unstable pulling speed in the production process, influencing the quality of products, causing the production interruption in serious cases and causing unnecessary maintenance work. Particularly, the control operation is simpler and more convenient by adopting the HMI, the adjustment range and the upper and lower limit values can be properly modified, the requirements on the product quality and the process operation are greatly met, the control device related to the pulling speed is not required to be maintained, the maintenance cost is reduced, and the hidden danger that the blank quality is influenced by the production interruption and the unstable adjustment of the potentiometer caused by the abnormal damage of the potentiometer is completely eliminated.
Claims (3)
1. The method for setting the casting speed of the continuous casting machine by HMI input to replace manual regulation is characterized by comprising the following steps: (1) editing and manufacturing an HMI (human machine interface) picture, and adding a pull speed adjusting sub-picture on the HMI picture; (2) after the picture is made, defining variables, and carrying out program design and test; (3) the HMI inputs a set pull-up speed value to replace a manual potentiometer to adjust the pull-up speed.
2. The method of replacing manual adjustment of casting speed of a continuous casting machine according to claim 1 by HMI input setting, characterized by: in the step (3), a set pulling speed value is input by the HMI and used as standby HMI pulling speed control for potentiometer adjustment, when the potentiometer fails, the HMI is switched to adjust the pulling speed in the first time, and the last normal pulling speed set value is used as an initial value of the pulling speed adjustment.
3. The method of replacing manual adjustment of casting speed of a continuous casting machine according to claim 1 by HMI input setting, characterized by: in the step (3), a set pulling speed value is input by an HMI (human machine interface) to be used as HMI pulling speed control for completely cancelling potentiometer adjustment, and after the potentiometer adjustment is cancelled, the pulling speed is adjusted by an operator according to the production rhythm and the temperature of molten steel from the start of automatic casting of the casting machine to the stop of casting of a tail blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010116228.2A CN111266545A (en) | 2020-02-25 | 2020-02-25 | Method for replacing manual regulation of casting speed of continuous casting machine by HMI input setting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010116228.2A CN111266545A (en) | 2020-02-25 | 2020-02-25 | Method for replacing manual regulation of casting speed of continuous casting machine by HMI input setting |
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| CN111266545A true CN111266545A (en) | 2020-06-12 |
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| CN202010116228.2A Pending CN111266545A (en) | 2020-02-25 | 2020-02-25 | Method for replacing manual regulation of casting speed of continuous casting machine by HMI input setting |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011251307A (en) * | 2010-06-01 | 2011-12-15 | Nippon Steel Corp | Continuous casting method, control device of continuous casting and program |
| CN102398006A (en) * | 2010-09-15 | 2012-04-04 | 鞍钢股份有限公司 | Device and method for detecting speed of continuous casting blank |
| CN102974621A (en) * | 2011-09-02 | 2013-03-20 | 鞍钢股份有限公司 | Steel ingot rolling automatic control system and control method thereof |
| CN104190893A (en) * | 2014-07-22 | 2014-12-10 | 北京有色金属研究总院 | Speed regulating device and speed regulating method for automatic continuous casting system |
-
2020
- 2020-02-25 CN CN202010116228.2A patent/CN111266545A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011251307A (en) * | 2010-06-01 | 2011-12-15 | Nippon Steel Corp | Continuous casting method, control device of continuous casting and program |
| CN102398006A (en) * | 2010-09-15 | 2012-04-04 | 鞍钢股份有限公司 | Device and method for detecting speed of continuous casting blank |
| CN102974621A (en) * | 2011-09-02 | 2013-03-20 | 鞍钢股份有限公司 | Steel ingot rolling automatic control system and control method thereof |
| CN104190893A (en) * | 2014-07-22 | 2014-12-10 | 北京有色金属研究总院 | Speed regulating device and speed regulating method for automatic continuous casting system |
Non-Patent Citations (2)
| Title |
|---|
| 张晓杰等: "连铸机拉速优化自动控制系统", 《电气应用》 * |
| 梁涛等: "宝钢连铸机HMI系统优化研究", 《仪器仪表学报》 * |
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Application publication date: 20200612 |