CN118023303A - A roll gap setting method, device and equipment in a thin strip rolling production process - Google Patents
A roll gap setting method, device and equipment in a thin strip rolling production process Download PDFInfo
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- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
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Abstract
本发明公开一种薄带轧制生产过程中的辊缝设定方法、装置及设备，涉及轧制技术领域，用于解决现有技术针对金属薄带的轧制过程中金属薄带的轧制力的预测精度低、预测过程复杂的问题。包括：获取金属薄带轧制过程中的相关数据；根据上下轧辊的原始半径设定初始轧辊压扁半径；根据相关数据中的部分数据计算轧制变形区金属薄带的平均变形抗力和出口变形抗力；根据工艺参数计算轧制变形区金属薄带的轧制力；结合获取以及求得的数据计算上下轧辊的压扁半径；该半径与初始轧辊压扁半径的关系满足预设条件时，求得的轧制力为最终轧制力；计算金属薄带的设定辊缝。能精确预测轧制过程中金属薄带的轧制力，且具有良好的可编程性，操作简单。
The present invention discloses a roll gap setting method, device and equipment in the process of thin strip rolling production, which relates to the field of rolling technology and is used to solve the problems of low prediction accuracy and complex prediction process of the rolling force of metal thin strips in the rolling process of metal thin strips in the prior art. It includes: obtaining relevant data in the rolling process of metal thin strips; setting the initial roll flattening radius according to the original radius of the upper and lower rolls; calculating the average deformation resistance and outlet deformation resistance of the metal thin strip in the rolling deformation zone according to part of the relevant data; calculating the rolling force of the metal thin strip in the rolling deformation zone according to process parameters; calculating the flattening radius of the upper and lower rolls in combination with the acquired and obtained data; when the relationship between the radius and the initial roll flattening radius meets the preset conditions, the obtained rolling force is the final rolling force; and calculating the set roll gap of the metal thin strip. It can accurately predict the rolling force of the metal thin strip in the rolling process, has good programmability, and is easy to operate.
Description
Technical Field
The invention relates to the technical field of rolling, in particular to a roll gap setting method, device and equipment in the thin strip rolling production process.
Background
Thin strip rolling is an advanced metal working technique, mainly used for preparing high-precision, lightweight and high-performance metal products. With the rise of 3C product miniaturization and micro-manufacturing technology, the industries of electronics, computers, medical treatment, energy sources, traffic and the like are in urgent need for high-quality metal thin strips, and development, research and industrialization of rolling thin strips are new hot spots.
For thin strip rolling, the setting of the roll gap of a rolling mill has important significance in the aspects of shape, size, quality, mechanical property, thickness uniformity, production efficiency and the like of products in the manufacturing process. In the rolling process, intensive researches on material performance, rolling process, rolling force performance parameters and the like are needed, so that rolling efficiency and strip quality are improved. In the roll gap setting process, the rolling force model plays a decisive role in the rolling process control of the thin strip, the prediction accuracy of the rolling force model directly influences the thickness and the shape of the finished thin strip, and the rolling force determines the size of the roll gap setting value.
At present, a mature and convenient setting method for a roll gap value in the rolling process of a metal thin strip is lacking, so that the prediction precision of the rolling force of the metal thin strip in the rolling process of the metal thin strip is low, and the prediction process is complex.
Accordingly, there is a need to provide a more reliable roll gap setting scheme in the thin strip rolling production process.
Disclosure of Invention
The invention aims to provide a roll gap setting method, device and equipment in the rolling production process of a metal thin strip, which are used for solving the problems that in the prior art, no roll gap value setting scheme is adopted in the rolling process of the metal thin strip, so that the prediction precision of the rolling force of the metal thin strip in the rolling process of the metal thin strip is low and the prediction process is complex.
In order to achieve the above object, the present invention provides the following technical solutions:
In a first aspect, the present invention provides a roll gap setting method in a thin strip rolling production process, the method comprising:
According to the material properties of the metal thin strip and the roller and the model of the rolling mill, obtaining the first Young modulus, the first Poisson ratio, the second Young modulus, the second Poisson ratio and the rigidity of the rolling mill of the metal thin strip material;
Obtaining technological parameters of set pass in the rolling process of the metal thin strip; the technological parameters comprise the initial thickness, the inlet thickness, the outlet thickness, the width, the front tension, the back tension, the friction coefficient and the original radius of the upper roller and the lower roller of the metal thin belt;
setting the flattening radius of an initial roller according to the original radius of the upper roller and the lower roller;
calculating the average deformation resistance and the outlet deformation resistance of the metal thin strip in the rolling deformation zone according to the initial thickness, the inlet thickness and the outlet thickness of the metal thin strip;
calculating the rolling force of the metal thin strip in the rolling deformation zone according to the technological parameters;
Calculating flattening radii of the upper and lower rolls according to the inlet thickness, the outlet thickness, the front tension, the first Young's modulus of the metal thin strip material, the first Poisson's ratio, the second Young's modulus of the roll material, the second Poisson's ratio, the original radii of the upper and lower rolls, the outlet deformation resistance and the rolling force of the metal thin strip in the rolling deformation zone;
judging whether the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets a preset condition or not;
if the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets the preset condition, determining the rolling force of the metal thin strip in the rolling deformation zone as the final rolling force;
And calculating the set roll gap of the metal thin strip according to the final rolling force and the rigidity of the rolling mill.
Compared with the prior art, the roll gap setting method in the thin strip rolling production process is provided by the invention. Obtaining a first Young modulus, a first Poisson ratio, a second Young modulus, a second Poisson ratio and rigidity of a rolling mill of a metal thin strip material according to the material properties of the metal thin strip and a roller and the model of the rolling mill; obtaining technological parameters of set pass in the rolling process of the metal thin strip; setting the flattening radius of an initial roller according to the original radius of the upper roller and the lower roller; calculating the average deformation resistance and the outlet deformation resistance of the metal thin strip in the rolling deformation zone according to the initial thickness, the inlet thickness and the outlet thickness of the metal thin strip; calculating the rolling force of the metal thin strip in the rolling deformation zone according to the technological parameters; calculating flattening radii of the upper roller and the lower roller according to the inlet thickness, the outlet thickness, the front tension, the first Young modulus of the metal thin belt material, the first Poisson ratio, the second Young modulus of the roller material, the second Poisson ratio, the original radii of the upper roller and the lower roller, the outlet deformation resistance and the rolling force of the metal thin belt in the rolling deformation area; judging whether the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets a preset condition or not; if the rolling force is satisfied, determining the rolling force of the metal thin strip in the rolling deformation zone as the final rolling force; and calculating the set roll gap of the metal thin belt. According to the invention, the roll gap in the rolling production process of the metal thin strip is set, so that the rolling force of the metal thin strip in the rolling process can be accurately predicted, the roll gap value suitable for rolling the thin strip is obtained, and the problem that the roll gap of the metal thin strip is difficult to set in the rolling production process is solved. The invention is safe and reliable, accurate in calculation, simple and convenient, has good programmability and is simple to operate. In addition, the method has no limitation on the types of metal thin strip materials, can be widely applied to setting of roll gaps in various types of metal thin strip rolling processes, is beneficial to reducing energy consumption in the rolling production process, improving the dimensional stability index of products and reducing production cost.
In a second aspect, the present invention provides a roll gap setting device in a thin strip rolling production process, the device comprising:
the first parameter acquisition module is used for acquiring the first Young modulus, the first Poisson ratio, the second Young modulus, the second Poisson ratio and the rigidity of the rolling mill of the metal thin strip material according to the material properties of the metal thin strip and the rolling roller and the model of the rolling mill;
The second parameter acquisition module is used for acquiring process parameters of set pass in the metal thin strip rolling process; the technological parameters comprise the initial thickness, the inlet thickness, the outlet thickness, the width, the front tension, the back tension, the friction coefficient and the original radius of the upper roller and the lower roller of the metal thin belt;
the initial roller flattening radius setting module is used for setting the flattening radius of the initial roller according to the original radius of the upper roller and the lower roller;
The deformation resistance calculation module is used for calculating the average deformation resistance and the outlet deformation resistance of the metal thin strip in the rolling deformation zone according to the initial thickness, the inlet thickness and the outlet thickness of the metal thin strip;
The rolling force calculation module is used for calculating the rolling force of the metal thin strip in the rolling deformation zone according to the technological parameters;
The flattening radius calculation module of the upper roller and the lower roller is used for calculating the flattening radius of the upper roller and the lower roller according to the inlet thickness, the outlet thickness, the front tension, the first Young modulus of the metal thin belt material, the first Poisson ratio, the second Young modulus of the roller material, the second Poisson ratio, the original radius of the upper roller and the lower roller, the deformation resistance of the outlet and the rolling force of the metal thin belt in the rolling deformation zone;
the judging module is used for judging whether the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets the preset condition;
The final rolling force determining module is used for determining the rolling force of the metal thin strip in the rolling deformation zone as the final rolling force if the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets the preset condition;
And the set roll gap calculation module is used for calculating the set roll gap of the metal thin strip according to the final rolling force and the rigidity of the rolling mill.
In a third aspect, the present invention provides a roll gap setting apparatus in a thin strip rolling production process, the apparatus comprising:
The communication unit/communication interface is used for acquiring the first Young modulus, the first Poisson ratio, the second Young modulus, the second Poisson ratio and the rigidity of the rolling mill of the metal thin strip material according to the material properties of the metal thin strip and the rolling roller and the model of the rolling mill;
Obtaining technological parameters of set pass in the rolling process of the metal thin strip; the technological parameters comprise the initial thickness, the inlet thickness, the outlet thickness, the width, the front tension, the back tension, the friction coefficient and the original radius of the upper roller and the lower roller of the metal thin belt;
A processing unit/processor for setting an initial roll flattening radius according to the original radius of the upper and lower rolls;
calculating the average deformation resistance and the outlet deformation resistance of the metal thin strip in the rolling deformation zone according to the initial thickness, the inlet thickness and the outlet thickness of the metal thin strip;
calculating the rolling force of the metal thin strip in the rolling deformation zone according to the technological parameters;
Calculating flattening radii of the upper and lower rolls according to the inlet thickness, the outlet thickness, the front tension, the first Young's modulus of the metal thin strip material, the first Poisson's ratio, the second Young's modulus of the roll material, the second Poisson's ratio, the original radii of the upper and lower rolls, the outlet deformation resistance and the rolling force of the metal thin strip in the rolling deformation zone;
judging whether the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets a preset condition or not;
if the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets the preset condition, determining the rolling force of the metal thin strip in the rolling deformation zone as the final rolling force;
And calculating the set roll gap of the metal thin strip according to the final rolling force and the rigidity of the rolling mill.
The technical effects achieved by the apparatus class scheme provided in the second aspect and the device class scheme provided in the third aspect are the same as those achieved by the method class scheme provided in the first aspect, and are not described herein again.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic flow chart of a roll gap setting method in a thin strip rolling production process;
FIG. 2 is a flow chart of a metal strip rolling process provided by the invention;
FIG. 3 is a schematic view of a rolling deformation zone of a metal strip according to the present invention;
FIG. 4 is a schematic diagram showing a comparison of calculated and measured values of rolling force of the model of the present invention;
FIG. 5 is a bar graph of calculated roll gaps for different passes provided by the model of the present invention;
FIG. 6 is a schematic view of a roll gap setting device in the process of rolling thin strips according to the present invention;
Fig. 7 is a schematic view of a roll gap setting apparatus in a thin strip rolling production process according to the present invention.
Reference numerals:
1-thickness gauge, 2-hydraulic plunger, 3-load sensor, 4-tensiometer, 5-backing roll, 6-working roll, 7-pinch roll, 8-coiling machine.
Detailed Description
In order to clearly describe the technical solution of the embodiments of the present invention, in the embodiments of the present invention, the words "first", "second", etc. are used to distinguish the same item or similar items having substantially the same function and effect. For example, the first threshold and the second threshold are merely for distinguishing between different thresholds, and are not limited in order. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.
In the present invention, the words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
In the present invention, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, a and b, a and c, b and c, or a, b and c, wherein a, b, c can be single or multiple.
The invention provides a roll gap setting scheme with simple operation and high precision. The rolling force model with simple model and high calculation speed is constructed, and the roll gap in the rolling process is dynamically and rapidly set according to the rolling force model, so that the shape, size and quality of the product are improved.
Next, the scheme provided by the embodiments of the present specification will be described with reference to the accompanying drawings:
as shown in fig. 1, the process may include the steps of:
Step 110: and obtaining the first Young modulus, the first Poisson ratio, the second Young modulus, the second Poisson ratio and the rigidity of the rolling mill of the metal thin strip material according to the material properties of the metal thin strip and the roller and the model of the rolling mill.
Step 120: obtaining technological parameters of set pass in the rolling process of the metal thin strip; the process parameters include the initial thickness, inlet thickness, outlet thickness, width, front tension, back tension, coefficient of friction and the original radius of the upper and lower rolls of the metal strip.
Step 130: setting the flattening radius of the initial roller according to the original radius of the upper roller and the lower roller,; Wherein the original radius of the upper and lower rolls is expressed asThe initial roll crush radius is expressed as。
Step 140: and calculating the average deformation resistance and the outlet deformation resistance of the metal thin strip in the rolling deformation zone according to the initial thickness of the metal thin strip, the inlet thickness and the outlet thickness.
Step 150: and calculating the rolling force of the metal thin strip in the rolling deformation zone according to the technological parameters.
Step 160: calculating flattening radii of the upper and lower rolls according to the inlet thickness, the outlet thickness, the front tension, the first Young's modulus of the metal thin strip material, the first Poisson's ratio, the second Young's modulus of the roll material, the second Poisson's ratio, the original radii of the upper and lower rolls, the outlet deformation resistance and the rolling force of the metal thin strip in the rolling deformation zone;
step 170: judging whether the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets a preset condition or not; specifically, it is determined whether the relationship between the flattening radius of the upper and lower rolls and the flattening radius of the initial roll satisfies: Wherein, the method comprises the steps of, wherein, Representing the flattening radius of the upper and lower rolls,Indicating the initial roll crush radius.
Step 180: if the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets the preset condition, determining the rolling force of the metal thin strip in the rolling deformation zone as the final rolling force;
Otherwise, if the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller does not meet the preset condition, the flattening radius of the upper roller and the lower roller is given to the flattening radius of the initial roller, the operations from step 140 to step 170 are circulated, the rolling force of the metal thin strip in the rolling deformation zone is circulated and calculated until the preset condition is met, and the final rolling force of the metal thin strip in the rolling deformation zone is obtained.
Step 190: and calculating the set roll gap of the metal thin strip according to the final rolling force and the rigidity of the rolling mill. Setting the roll gap of the rolling mill to be according to the actual rolling scheduleNormal production is performed.
The method of fig. 1 obtains a first young's modulus, a first poisson's ratio, a second young's modulus, a second poisson's ratio and a rigidity of a rolling mill of a metal strip material according to material properties of the metal strip and the rolling rolls and a model of the rolling mill; obtaining technological parameters of set pass in the rolling process of the metal thin strip; setting the flattening radius of an initial roller according to the original radius of the upper roller and the lower roller; calculating the average deformation resistance and the outlet deformation resistance of the metal thin strip in the rolling deformation zone according to the initial thickness, the inlet thickness and the outlet thickness of the metal thin strip; calculating the rolling force of the metal thin strip in the rolling deformation zone according to the technological parameters; calculating flattening radii of the upper roller and the lower roller according to the inlet thickness, the outlet thickness, the front tension, the first Young modulus of the metal thin belt material, the first Poisson ratio, the second Young modulus of the roller material, the second Poisson ratio, the original radii of the upper roller and the lower roller, the outlet deformation resistance and the rolling force of the metal thin belt in the rolling deformation area; judging whether the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets a preset condition or not; if the rolling force is satisfied, determining the rolling force of the metal thin strip in the rolling deformation zone as the final rolling force; and calculating the set roll gap of the metal thin belt. According to the invention, the roll gap in the rolling production process of the metal thin strip is set, so that the rolling force of the metal thin strip in the rolling process can be accurately predicted, the roll gap value suitable for rolling the thin strip is obtained, and the problem that the roll gap of the metal thin strip is difficult to set in the rolling production process is solved. The invention is safe and reliable, accurate in calculation, simple and convenient, has good programmability and is simple to operate. In addition, the method has no limitation on the types of metal thin strip materials, can be widely applied to setting of roll gaps in various types of metal thin strip rolling processes, is beneficial to reducing energy consumption in the rolling production process, improving the dimensional stability index of products and reducing production cost.
Based on the method of fig. 1, the examples of the present specification also provide some specific implementations of the method, as described below.
Wherein step 150 may be implemented based on the steps of:
step 1501: according to the inlet thickness of the metal strip Thickness of outletWidth of the containerFront tensionPost tensionYoung's modulusAnd poisson's ratioInitial roll flattening radius set in step 3And the average deformation resistance of the rolled deformation zone metal strip obtained in the step 4Calculating the rolling force of the inlet elastic compression zoneAnd outlet elastic recovery zone rolling force; More specifically, step 1501, when implemented, is based on the inlet thickness of the metal stripThickness of outletWidth of the containerFront tensionPost tensionYoung's modulusAnd poisson's ratioInitial roll flattening radius set in step 3And the average deformation resistance of the rolled deformation zone metal strip obtained in the step 4Calculating the rolling force of the inlet elastic compression zoneAnd outlet elastic recovery zone rolling forceSpecifically, as formula (1) and formula (2):
（1）
（2）
step 1502: according to the inlet thickness of the metal strip Thickness of outletWidth of the containerInitial roll flattening radiusAverage deformation resistance of metal strip in rolling deformation zoneCalculating the rolling force of the plastic deformation zone; Step 1502, in particular implementations, is based on the inlet thickness of the metal ribbonThickness of outletWidth of the containerInitial roll crush radius set in step 130And the average deformation resistance of the rolled deformation zone metal strip obtained in step 140Calculating the rolling force of the plastic deformation zoneSpecifically, as shown in formula (3):
（3）
Step 1503: according to the rolling force of the inlet elastic compression zone And outlet elastic recovery zone rolling forceAnd rolling force in plastic deformation zoneCalculating the rolling force of the metal thin strip in the rolling deformation zone。
Step 1503, when implemented, may be based on the inlet elastic compression zone rolling force obtained in step 1502 described aboveAnd outlet elastic recovery zone rolling forceAnd the plastic deformation zone rolling force obtained in step 1503Calculating the rolling force of the metal thin strip in the rolling deformation zoneSpecifically, as shown in formula (4):
（4）
further, step 160, when implemented, may be based on the inlet thickness of the metal strip Thickness of outletFront tensionFirst Young's modulus of metal ribbon materialAnd a second Poisson's ratioSecond Young's modulus of roll materialAnd a second Poisson's ratioOriginal radius of upper and lower rollsThe resistance to deformation at the outlet obtained in step 140And the rolling force of the rolled deformation zone metal strip obtained in step 150Calculating the flattening radius of the upper and lower rolls in consideration of the elastic compression and elastic recovery of the metal stripSpecifically, as shown in formula (5):
（5）
Still further, step 180 may be based on the final rolling force obtained in step 170 Calculating a set roll gap of the metal thin stripSpecifically, as shown in formula (6):
（6）
Next, a specific implementation process of the technical scheme provided by the invention is illustrated by way of example, and the technical effects corresponding to the technical scheme provided by the invention are deduced:
The data in table 1 are given as an example: table 1 shows the width The invention provides an ID969 steel coil five-pass rolling experimental field technical specification table, which takes a first-pass technical parameter as an example to explain a roll gap setting method in a metal thin strip rolling production process in detail, and the specific operation steps are as follows.
Table 1 id969 steel coil rolling process specification table
Step 1: obtaining the first Young's modulus of the ID969 metal strip material according to the material properties of the ID969 metal strip and the roller and the model of the rolling millAnd poisson's ratioSecond Young's modulus of roll materialAnd poisson's ratioRigidity of rolling mill；
Step2: according to the formulated ID969 metal thin strip rolling technological rule, specific technological rule parameters of the first pass are obtained, wherein the specific technological rule parameters comprise the initial thickness of the metal thin stripInlet thicknessThickness of outletWidth of the containerFront tensionPost tensionCoefficient of frictionOriginal radius of upper and lower rolls；
Step 3: according to the original radius of the upper and lower rollsSetting initial roll flattening radius；
Step 4: according to the initial thicknessInlet thicknessThickness of outletCalculating the average deformation resistance of the metal strip in the rolling deformation zoneAnd resistance to deformation at the outlet；
；
；
Step 5: according to the acquired technological parameters, calculating the rolling force of the metal thin strip in the rolling deformation zone；
Step 5.1: according to the inlet thickness of the metal stripThickness of outletWidth of the containerFront tensionPost tensionYoung's modulusAnd poisson's ratioInitial roll flattening radius set in step 3And the average deformation resistance of the rolled deformation zone metal strip obtained in the step 4Calculating the rolling force of the inlet elastic compression zoneAnd outlet elastic recovery zone rolling force；
；
；
Step 5.2: according to the inlet thickness of the metal stripThickness of outletWidth of the containerInitial roll flattening radius set in step 3And the average deformation resistance of the rolled deformation zone metal strip obtained in the step 4Calculating the rolling force of the plastic deformation zone；
；
Step 5.3: the inlet elastic compression zone rolling force obtained according to the above step 5.2And outlet elastic recovery zone rolling forceAnd the rolling force of the plastic deformation zone obtained in the step 5.3Calculating the rolling force of the metal thin strip in the rolling deformation zone；
；
Step 6: according to the inlet thickness of the metal stripThickness of outletFront tensionFirst Young's modulus of metal ribbon materialAnd poisson's ratioSecond Young's modulus of roll materialAnd poisson's ratioOriginal radius of upper and lower rollsThe resistance to deformation at the outlet obtained in step4And the rolling force of the metal thin strip in the rolling deformation zone obtained in the step 5Calculating the flattening radius of the upper and lower rolls in consideration of the elastic compression and elastic recovery of the metal strip；
；
Step 7: judging the flattening radius of the roller calculated in the step 6With the radius of the roller set for the first time in the step 3Comparing, and judging that the two do not meet the judgment conditionThen the radius will collapseValue assignment of (2)The operations from step 4 to step 7 are circulated, and the judging conditions are satisfied after the circulation is performed for 6 times, so that the final rolling force of the metal thin strip in the rolling deformation zone is obtained；
Step 8: according to the final rolling force obtained in step 7Calculating a set roll gap of the metal thin stripSetting the roll gap of the rolling mill to be according to the actual rolling scheduleNormal production is carried out;
；
the rolling force and the set value of the roll gap of the rolling mill of the other four passes of the ID969 steel coil in the embodiment can be calculated by the same method.
When the technical scheme provided by the invention is realized, the corresponding metal thin strip rolling process flow is shown in fig. 2, after the initial steel coil passes through the thickness gauge 1 to detect the thickness of an inlet, the initial steel coil passes through a first rolling mill, and is contacted with a metal thin strip and is called a working roll 6, and is called a supporting roll 5 contacted with the working roll 6, one end of the supporting roll 5 is provided with a load sensor 3, and the load sensor 3 is used for feeding back the rolling force in real time; the other end of the supporting roller 5 is provided with a hydraulic plunger 2; and then the hydraulic cylinder is used for adjusting, increasing or reducing the roll gap, the tensiometer 4 between each frame is used for measuring the tension born by the metal thin strip, and the required product is obtained after the five frames are continuously rolled. The entrance of the coiling machine 8 is provided with a pinch roll 7, the strip steel is segmented by using flying shears, and the steel coil is packed by the coiling machine 8.
In fig. 3, the respective regions corresponding to the rolling process of the metal strip are illustrated, as shown in fig. 3, when rolling is performed in the rolling direction indicated in fig. 3, the first region is an elastic compression region, the second region is a plastic deformation region, the third region is an elastic recovery region,Is the inlet thickness of the thin strip of metal,Is the outlet thickness of the thin strip of metal,Representing the front tension of the metal strip,Indicating the back tension of the metal ribbon.
In order to prove the accuracy and the reliability of the setting method of the roll gap in the rolling production process of the metal thin strip. The rolling force calculated value of each pass of the ID969 metal strip is compared with the actual measured value on site, as shown in FIG. 4, and a predicted roll gap value in the embodiment of the invention is calculated, as shown in FIG. 5. From the data in fig. 4 and 5, it can be seen that the predicted rolling force using the present invention is consistent with the measured rolling force, with an error of within 3.58%. Therefore, the technical scheme provided by the invention has high prediction precision, can be better applied to actual production, and guides planning of metal strip rolling technological rules.
Based on the same thought, the invention also provides a roll gap setting device in the thin strip rolling production process, as shown in fig. 6, the device can comprise:
A first parameter obtaining module 610, configured to obtain a first young modulus, a first poisson ratio, a second young modulus, a second poisson ratio, and a rigidity of the rolling mill of the metal strip material according to material properties of the metal strip and the roller and a model of the rolling mill;
A second parameter obtaining module 620, configured to obtain a process parameter of a set pass in the metal strip rolling process; the technological parameters comprise the initial thickness, the inlet thickness, the outlet thickness, the width, the front tension, the back tension, the friction coefficient and the original radius of the upper roller and the lower roller of the metal thin belt;
An initial roll flattening radius setting module 630, configured to set an initial roll flattening radius according to the original radii of the upper and lower rolls;
A deformation resistance calculation module 640, configured to calculate an average deformation resistance and an outlet deformation resistance of the metal strip in the rolling deformation zone according to the initial thickness of the metal strip, the inlet thickness and the outlet thickness;
a rolling force calculation module 650 for calculating the rolling force of the metal thin strip in the rolling deformation zone according to the process parameters;
A flattening radius calculation module 660 of the upper and lower rolls, configured to calculate flattening radii of the upper and lower rolls according to an inlet thickness of the metal strip, the outlet thickness, the front tension, a first young's modulus of the metal strip material, the first poisson ratio, a second young's modulus of the roll material, the second poisson ratio, an original radius of the upper and lower rolls, the outlet deformation resistance, and a rolling force of the metal strip in the rolling deformation zone;
a judging module 670, configured to judge whether a relationship between the flattening radius of the upper and lower rolls and the flattening radius of the initial roll meets a preset condition;
a final rolling force determining module 680, configured to determine a rolling force of the metal strip in the rolling deformation zone as a final rolling force if a relationship between the flattening radius of the upper and lower rolls and the flattening radius of the initial roll meets a preset condition;
And the set roll gap calculation module 690 is used for calculating the set roll gap of the metal thin strip according to the final rolling force and the rigidity of the rolling mill.
Based on the apparatus in fig. 6, some specific implementation units may also be included:
optionally, the judging module 670 is configured to:
judging whether the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets the following conditions: Wherein, the method comprises the steps of, wherein, Representing the flattening radius of the upper and lower rolls,Representing the initial roll flattening radius;
The apparatus may further include:
and the circulation module is used for giving the flattening radius value of the upper roller and the lower roller to the flattening radius of the initial roller if the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller does not meet the preset condition, and circularly calculating the rolling force of the metal thin strip in the rolling deformation zone until the preset condition is met, so as to obtain the final rolling force of the metal thin strip in the rolling deformation zone.
Optionally, the rolling force calculation module 650 of the metal strip may specifically include:
The rolling force unit of the inlet elastic compression zone and the rolling force unit of the outlet elastic recovery zone are used for calculating the rolling force of the inlet elastic compression zone and the rolling force of the outlet elastic recovery zone according to the inlet thickness, the outlet thickness, the width, the front tension, the back tension, the Young modulus, the Poisson ratio, the flattening radius of an initial roller and the average deformation resistance of the metal thin strip of the rolling deformation zone;
the rolling force calculation unit of the plastic deformation zone is used for calculating the rolling force of the plastic deformation zone according to the inlet thickness, the outlet thickness, the width, the initial roll flattening radius and the average deformation resistance of the metal thin strip of the rolling deformation zone;
And the rolling force calculation unit is used for calculating the rolling force of the metal thin strip in the rolling deformation zone according to the rolling force of the inlet elastic compression zone, the rolling force of the outlet elastic recovery zone and the rolling force of the plastic deformation zone.
Alternatively, the deformation resistance calculation module 640 may be specifically configured to:
In the rolling process of the metal thin strip, establishing a mathematical model of deformation resistance of the metal thin strip by taking the accumulated deformation degree as an independent variable; the magnitudes of the average deformation resistance and the outlet deformation resistance increase with an increase in the cumulative rolling reduction; the fitting formula is:
；
；
；
Wherein, The mathematical relationship between the yield stress and the average deformation resistance of the metal thin strip is as follows:； Is the yield stress of the material in an annealed state; coefficients to be fitted for the model are related to the kind of the material; Is the initial thickness of the metal ribbon; Is the inlet thickness of the thin strip of metal, Is the outlet thickness of the metal ribbon.
Optionally, the inlet elastic compression zone rolling force and outlet elastic recovery zone rolling force unit may be specifically configured to:
The formula is adopted:
；
；
calculating the rolling force of the inlet elastic compression zone and the rolling force of the outlet elastic recovery zone; wherein, Representing the width of the thin strip of metal,Representing the front tension of the metal strip,Indicating the back tension of the metal strip,Representing the first young's modulus,Representing the first poisson's ratio,Indicating the initial roll flattening radius,Represents the average deformation resistance of the metal strip in the rolling deformation zone,Representing the rolling force of the inlet elastic compression zone,Representing the rolling force of the outlet elastic recovery zone.
Alternatively, the plastic deformation zone rolling force calculation unit may be specifically configured to:
The formula is adopted:
；
calculating the rolling force of the plastic deformation area; wherein, Representing the rolling force in the plastic deformation zone,Representing the coefficient of friction;
the rolling force calculation unit for rolling the metal strip in the deformation zone can be specifically used for:
The formula is adopted:
；
And calculating to obtain the rolling force of the metal thin strip in the rolling deformation zone.
Optionally, the flattening radius calculation module 660 of the upper and lower rolls may be specifically configured to:
The formula is adopted:
；
calculating flattening radius of the upper roller and the lower roller, wherein, Representing the flattening radius of the upper and lower rolls,Representing the original radius of the upper and lower rolls,Is the inlet thickness of the thin strip of metal,Is the outlet thickness of the thin strip of metal,Representing the front tension of the metal strip,Representing the first young's modulus,Representing the first poisson's ratio,Representing a second young's modulus of the mill roll material,Representing a second poisson's ratio of the roll material,Indicating the resistance to deformation of the outlet,The rolling force of the metal strip in the rolling deformation zone is shown.
Optionally, the roll gap calculating module 690 for setting the metal strip may be specifically configured to:
The formula is adopted:
；
Calculating a set roll gap of the metal thin belt; wherein, The final rolling force is indicated as such,Indicating the set roll gap of the metal thin strip,Representing the stiffness of the mill.
Based on the same thought, the embodiment of the specification also provides roll gap setting equipment in the thin strip rolling production process. As shown in fig. 7, may include:
The communication unit/communication interface is used for acquiring the first Young modulus, the first Poisson ratio, the second Young modulus, the second Poisson ratio and the rigidity of the rolling mill of the metal thin strip material according to the material properties of the metal thin strip and the rolling roller and the model of the rolling mill;
Obtaining technological parameters of set pass in the rolling process of the metal thin strip; the technological parameters comprise the initial thickness, the inlet thickness, the outlet thickness, the width, the front tension, the back tension, the friction coefficient and the original radius of the upper roller and the lower roller of the metal thin belt;
A processing unit/processor for setting an initial roll flattening radius according to the original radius of the upper and lower rolls;
calculating the average deformation resistance and the outlet deformation resistance of the metal thin strip in the rolling deformation zone according to the initial thickness, the inlet thickness and the outlet thickness of the metal thin strip;
calculating the rolling force of the metal thin strip in the rolling deformation zone according to the technological parameters;
Calculating flattening radii of the upper and lower rolls according to the inlet thickness, the outlet thickness, the front tension, the first Young's modulus of the metal thin strip material, the first Poisson's ratio, the second Young's modulus of the roll material, the second Poisson's ratio, the original radii of the upper and lower rolls, the outlet deformation resistance and the rolling force of the metal thin strip in the rolling deformation zone;
judging whether the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets a preset condition or not;
if the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets the preset condition, determining the rolling force of the metal thin strip in the rolling deformation zone as the final rolling force;
And calculating the set roll gap of the metal thin strip according to the final rolling force and the rigidity of the rolling mill.
As shown in fig. 7, the terminal device may further include a communication line. The communication line may include a pathway to communicate information between the aforementioned components.
Optionally, as shown in fig. 7, the terminal device may further include a memory. The memory is used for storing computer-executable instructions for executing the scheme of the invention, and the processor is used for controlling the execution. The processor is configured to execute computer-executable instructions stored in the memory, thereby implementing the method provided by the embodiment of the invention.
In a specific implementation, as one embodiment, as shown in FIG. 7, the processor may include one or more CPUs, such as CPU0 and CPU1 in FIG. 7.
In a specific implementation, as an embodiment, as shown in fig. 7, the terminal device may include a plurality of processors, such as the processor in fig. 7. Each of these processors may be a single-core processor or a multi-core processor.
Although the invention is described herein in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
Although the invention has been described in connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the invention. Accordingly, the specification and drawings are merely exemplary illustrations of the present invention as defined in the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the invention. It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. The roll gap setting method in the thin strip rolling production process is characterized by comprising the following steps of:
According to the material properties of the metal thin strip and the roller and the model of the rolling mill, obtaining the first Young modulus, the first Poisson ratio, the second Young modulus, the second Poisson ratio and the rigidity of the rolling mill of the metal thin strip material;
Obtaining technological parameters of set pass in the rolling process of the metal thin strip; the technological parameters comprise the initial thickness, the inlet thickness, the outlet thickness, the width, the front tension, the back tension, the friction coefficient and the original radius of the upper roller and the lower roller of the metal thin belt;
setting the flattening radius of an initial roller according to the original radius of the upper roller and the lower roller;
calculating the average deformation resistance and the outlet deformation resistance of the metal thin strip in the rolling deformation zone according to the initial thickness, the inlet thickness and the outlet thickness of the metal thin strip;
calculating the rolling force of the metal thin strip in the rolling deformation zone according to the technological parameters;
Calculating flattening radii of the upper and lower rolls according to the inlet thickness, the outlet thickness, the front tension, the first Young's modulus of the metal thin strip material, the first Poisson's ratio, the second Young's modulus of the roll material, the second Poisson's ratio, the original radii of the upper and lower rolls, the outlet deformation resistance and the rolling force of the metal thin strip in the rolling deformation zone;
judging whether the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets a preset condition or not;
if the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets the preset condition, determining the rolling force of the metal thin strip in the rolling deformation zone as the final rolling force;
And calculating the set roll gap of the metal thin strip according to the final rolling force and the rigidity of the rolling mill.
2. The roll gap setting method in a thin strip rolling production process according to claim 1, wherein determining whether a relationship between the flattening radii of the upper and lower rolls and the initial roll flattening radius satisfies a preset condition comprises:
judging whether the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets the following conditions: wherein/> Representing the flattening radius of the upper and lower rolls,Representing the initial roll flattening radius;
After judging whether the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets the preset condition, the method further comprises the following steps:
If the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller does not meet the preset condition, giving the flattening radius of the upper roller and the lower roller to the flattening radius of the initial roller, and circularly calculating the rolling force of the metal thin strip in the rolling deformation zone until the preset condition is met, so as to obtain the final rolling force of the metal thin strip in the rolling deformation zone.
3. The roll gap setting method in a thin strip rolling production process according to claim 1, wherein the rolling force of the metal thin strip in the rolling deformation zone is calculated according to the process parameters, specifically comprising:
Calculating the rolling force of an inlet elastic compression zone and the rolling force of an outlet elastic recovery zone according to the inlet thickness, the outlet thickness, the width, the front tension, the back tension, the Young modulus, the Poisson ratio, the initial roll flattening radius and the average deformation resistance of the metal strip in the rolling deformation zone of the metal strip;
calculating the rolling force of the plastic deformation zone according to the inlet thickness, outlet thickness and width of the metal thin strip, the flattening radius of the initial roller and the average deformation resistance of the metal thin strip in the rolling deformation zone;
And calculating the rolling force of the metal thin strip in the rolling deformation zone according to the rolling force of the inlet elastic compression zone, the rolling force of the outlet elastic recovery zone and the rolling force of the plastic deformation zone.
4. A roll gap setting method in a strip rolling process according to claim 3, wherein the calculating the average deformation resistance and the exit deformation resistance of the metal strip in the rolling deformation zone according to the initial thickness, the entrance thickness and the exit thickness of the metal strip specifically comprises:
In the rolling process of the metal thin strip, establishing a mathematical model of deformation resistance of the metal thin strip by taking the accumulated deformation degree as an independent variable; the magnitudes of the average deformation resistance and the outlet deformation resistance increase with an increase in the cumulative rolling reduction; the fitting formula is:
；
；
；
Wherein, The mathematical relationship between the yield stress and the average deformation resistance of the metal thin strip is as follows: /(I)；Is the yield stress of the material in an annealed state; /(I)Coefficients to be fitted for the model are related to the kind of the material; /(I)Is the initial thickness of the metal ribbon; /(I)Is the inlet thickness of the metal thin strip,Is the outlet thickness of the metal ribbon.
5. The roll gap setting method in a strip rolling process according to claim 4, wherein the calculating of the inlet elastic compression zone rolling force and the outlet elastic recovery zone rolling force according to the inlet thickness, the outlet thickness, the width, the front tension, the back tension, the young's modulus, the poisson ratio, the initial roll flattening radius, and the average deformation resistance of the strip in the rolling deformation zone specifically comprises:
The formula is adopted:
；
；
calculating the rolling force of the inlet elastic compression zone and the rolling force of the outlet elastic recovery zone; wherein, Representing the width of a thin strip of metal,Representing the front tension of a thin metal strip,Representing the back tension of a thin strip of metal,Representing the first Young's modulus,Representing the first Poisson's ratio,Representing the initial roll crush radius,Represents the average deformation resistance of the metal strip in the rolling deformation zone,Representing the rolling force of the elastic compression zone of the inlet/(Representing the rolling force of the outlet elastic recovery zone.
6. The roll gap setting method in a strip rolling process according to claim 5, wherein the calculation of the plastic deformation zone rolling force based on the inlet thickness, outlet thickness, width, initial roll flattening radius of the metal strip and the average deformation resistance of the metal strip in the rolling deformation zone specifically comprises:
The formula is adopted:
；
calculating the rolling force of the plastic deformation area; wherein, Representing the rolling force of the plastic deformation zone,Representing the coefficient of friction;
The rolling force of the metal thin strip in the rolling deformation zone is calculated according to the rolling force of the inlet elastic compression zone, the rolling force of the outlet elastic recovery zone and the rolling force of the plastic deformation zone, and the rolling force comprises the following specific steps:
The formula is adopted:
；
And calculating to obtain the rolling force of the metal thin strip in the rolling deformation zone.
7. The roll gap setting method in a thin strip rolling production process according to claim 1, wherein calculating the flattening radius of the upper and lower rolls based on the inlet thickness of the metal thin strip, the outlet thickness, the front tension, the first young's modulus of the metal thin strip material, the first poisson's ratio, the second young's modulus of the roll material, the second poisson's ratio, the original radius of the upper and lower rolls, the outlet deformation resistance, and the rolling force of the metal thin strip in the rolling deformation zone, specifically comprises:
The formula is adopted:
；
calculating flattening radius of the upper roller and the lower roller, wherein, Representing the flattening radius of the upper and lower rolls,Representing the original radius of the upper and lower rolls,Is the inlet thickness of the metal thin strip,For the exit thickness of the thin strip of metal,Representing the front tension of a thin metal strip,Representing the first Young's modulus,Representing the first Poisson's ratio,Representing the second Young's modulus of the roll material,Representing a second poisson's ratio of the roll material,Representing the deformation resistance of the outlet,The rolling force of the metal strip in the rolling deformation zone is shown.
8. The roll gap setting method in a thin strip rolling production process according to claim 6, wherein calculating the set roll gap of the metal thin strip according to the final rolling force and the rigidity of the rolling mill specifically comprises:
The formula is adopted:
；
Calculating a set roll gap of the metal thin belt; wherein, Representing the final rolling force,Representing the set roll gap of the metal thin strip,Representing the stiffness of the mill.
9. A roll gap setting device in a thin strip rolling production process, characterized in that the device comprises:
the first parameter acquisition module is used for acquiring the first Young modulus, the first Poisson ratio, the second Young modulus, the second Poisson ratio and the rigidity of the rolling mill of the metal thin strip material according to the material properties of the metal thin strip and the rolling roller and the model of the rolling mill;
The second parameter acquisition module is used for acquiring process parameters of set pass in the metal thin strip rolling process; the technological parameters comprise the initial thickness, the inlet thickness, the outlet thickness, the width, the front tension, the back tension, the friction coefficient and the original radius of the upper roller and the lower roller of the metal thin belt;
the initial roller flattening radius setting module is used for setting the flattening radius of the initial roller according to the original radius of the upper roller and the lower roller;
The deformation resistance calculation module is used for calculating the average deformation resistance and the outlet deformation resistance of the metal thin strip in the rolling deformation zone according to the initial thickness, the inlet thickness and the outlet thickness of the metal thin strip;
The rolling force calculation module is used for calculating the rolling force of the metal thin strip in the rolling deformation zone according to the technological parameters;
The flattening radius calculation module of the upper roller and the lower roller is used for calculating the flattening radius of the upper roller and the lower roller according to the inlet thickness, the outlet thickness, the front tension, the first Young modulus of the metal thin belt material, the first Poisson ratio, the second Young modulus of the roller material, the second Poisson ratio, the original radius of the upper roller and the lower roller, the deformation resistance of the outlet and the rolling force of the metal thin belt in the rolling deformation zone;
the judging module is used for judging whether the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets the preset condition;
The final rolling force determining module is used for determining the rolling force of the metal thin strip in the rolling deformation zone as the final rolling force if the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets the preset condition;
And the set roll gap calculation module is used for calculating the set roll gap of the metal thin strip according to the final rolling force and the rigidity of the rolling mill.
10. A roll gap setting apparatus in a thin strip rolling production process, characterized in that the apparatus comprises:
The communication unit/communication interface is used for acquiring the first Young modulus, the first Poisson ratio, the second Young modulus, the second Poisson ratio and the rigidity of the rolling mill of the metal thin strip material according to the material properties of the metal thin strip and the rolling roller and the model of the rolling mill;
Obtaining technological parameters of set pass in the rolling process of the metal thin strip; the technological parameters comprise the initial thickness, the inlet thickness, the outlet thickness, the width, the front tension, the back tension, the friction coefficient and the original radius of the upper roller and the lower roller of the metal thin belt;
A processing unit/processor for setting an initial roll flattening radius according to the original radius of the upper and lower rolls;
calculating the average deformation resistance and the outlet deformation resistance of the metal thin strip in the rolling deformation zone according to the initial thickness, the inlet thickness and the outlet thickness of the metal thin strip;
calculating the rolling force of the metal thin strip in the rolling deformation zone according to the technological parameters;
Calculating flattening radii of the upper and lower rolls according to the inlet thickness, the outlet thickness, the front tension, the first Young's modulus of the metal thin strip material, the first Poisson's ratio, the second Young's modulus of the roll material, the second Poisson's ratio, the original radii of the upper and lower rolls, the outlet deformation resistance and the rolling force of the metal thin strip in the rolling deformation zone;
judging whether the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets a preset condition or not;
if the relation between the flattening radius of the upper roller and the lower roller and the flattening radius of the initial roller meets the preset condition, determining the rolling force of the metal thin strip in the rolling deformation zone as the final rolling force;
And calculating the set roll gap of the metal thin strip according to the final rolling force and the rigidity of the rolling mill.
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