CN110605298B - Method for calculating hydraulic cylinder thrust of ironing roller based on VB application - Google Patents
Method for calculating hydraulic cylinder thrust of ironing roller based on VB application Download PDFInfo
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- CN110605298B CN110605298B CN201910739216.2A CN201910739216A CN110605298B CN 110605298 B CN110605298 B CN 110605298B CN 201910739216 A CN201910739216 A CN 201910739216A CN 110605298 B CN110605298 B CN 110605298B
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- hydraulic cylinder
- ironing
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- swing arm
- ironing roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0057—Coiling the rolled product
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- Winding Of Webs (AREA)
- Control Of Metal Rolling (AREA)
Abstract
A method for realizing the calculation of the thrust of a hydraulic cylinder of a ironing roller based on VB application comprises a winding drum, the ironing roller, a driving swing arm, a bracket and a hydraulic cylinder, wherein the hydraulic cylinder fixed on the bracket can apply ironing force to the winding drum through the swing arm, the driving swing arm and the ironing roller, the influence brought by various parameter index dimensions can be eliminated in a linear normalization data processing mode, the corresponding relation between the thrust of the hydraulic cylinder of the ironing roller and the change of a winding diameter can be accurately reflected by a constructed curve fitting relation, the fitting curve relation established by the calculation of the thrust of the hydraulic cylinder of the ironing device is recorded into a constructed VB program through a program interface, the winding diameter, the ironing force and the like are set as input quantities, the thrust and the pressure of the oil cylinder are set as output quantities, and the calculation work is not needed under the next similar condition, and the hydraulic cylinder is directly set according to the stored control parameters.
Description
Technical Field
The invention belongs to the technical field of nonferrous metal processing, and particularly relates to a method for calculating the thrust of a hydraulic cylinder of a ironing roller based on VB application, which is suitable for an ironing device of an aluminum plate and foil rolling mill.
Background
The ironing roller is a key device in the production process of the aluminum plate strip foil, and assists the rolling machine to roll so as to improve the rolling quality of the coiled material. In the coiling process, the coil diameter is continuously changed, and in order to realize stable rolling and obtain a good coil coiling effect, the ironing force of the ironing roller on the coil needs to be maintained within a certain range, so that the ironing force of the ironing roller needs to be accurately controlled.
With reference to fig. 1, the conventional ironing roller device mainly comprises six parts, namely a winding drum, an ironing roller, a driving swing arm, a bracket, a hydraulic cylinder and the like, wherein the thrust of the hydraulic cylinder is used for adjusting the back pressure of the hydraulic cylinder through a proportional valve so as to realize the balance of the ironing roller.
In design practice, parameters such as the diameter of a winding drum, the diameter change of a ironing roller, the coordinate of a swinging point of the ironing roller, the length of a force arm of each part and the like affect the balance effect of ironing force together, and the parameters and the thrust of a hydraulic cylinder have nonlinear functional relations, so that the difficulty of accurate calculation of the ironing force is increased.
Related reports are not yet seen in a method for calculating the thrust of the hydraulic cylinder of the ironing roller based on VB application, and VB is short for Visual Basic.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a method for calculating the thrust of the hydraulic cylinder of the ironing roller based on VB application.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
the utility model provides a method based on VB is used and is realized ironing roller pneumatic cylinder thrust calculation, contains reel, ironing roller, drive swing arm, support and pneumatic cylinder in ironing roller device, and the pneumatic cylinder of fixing on the support can apply ironing force to the reel through swing arm, drive swing arm and ironing roller, characterized by:
(1) constructing a physical model of each component according to basic parameters of each component in the ironing roller device and through three-dimensional software Inventor, and obtaining the gravity center of each component, the coordinate position of a rotation center and the length of each arm of force when the winding drum has different winding diameters by using a measuring tool in the three-dimensional software;
(2) according to the law of conservation of angular momentum, the hydraulic cylinder, the driving swing arm, the swing arm cantilever and the ironing roller are considered to rotate around a fixed axis and the resultant force of the hydraulic cylinder, the driving swing arm, the swing arm cantilever and the ironing roller is zero, and the relation is as follows:
T * ＝(T 1 L 1 -T 2 L 2 -T 3 L 3 +FL 4 )/L
in the above relation, T * -hydraulic cylinder thrust KN; t (T) 1 -the pressure KN of the ironing roller on the web; t (T) 2 -ironing roll gravity KN; t (T) 3 Driving the swing arm gravity KN; f-back pressure KN of the hydraulic cylinder; l (L) 1 -arm m of ironing force; l (L) 2 -moment arm m of the ironing roll gravity; l (L) 3 -a moment arm m driving the weight of the swing arm; the arm of force m of the L-hydraulic cylinder pressure;
(3) presetting ironing force T according to the relation (2) 1 Calculating the thrust T of the hydraulic cylinder when the rolling diameter is changed * And obtaining data of one-to-one correspondence of the thrust of the hydraulic cylinder of the ironing roller and the rolling diameter, and then carrying out dimensionless processing on the thrust value of the hydraulic cylinder and the rolling diameter value in a linear normalization mode, wherein the linear normalization mode has the following conversion function relation:
in the functional relation, x-is the sample data needing to be normalized, namely the hydraulic cylinder thrust value or the roll diameter, max (x) -the maximum value of the sample data, and min (x) -the minimum value of the sample data;
(4) and performing curve fitting on the linear normalized hydraulic cylinder thrust and the rolling diameter data by using a curve fitting tool to obtain a fitting curve relation between the hydraulic cylinder thrust and the rolling diameter as follows:
y＝ax 5 -bx 4 +cx 3 -dx 2 +ex-k
in the fitting curve relation, x and y respectively represent normalized parameter values of the roll diameter and the thrust of the hydraulic cylinder, a, b, c, d and e are coefficients of various power terms, and k is a constant value;
(5) and (3) establishing the VB application program according to the fitting relation in the step (4), wherein the fitting calculation work is not needed when the similar situation is encountered next time, and the VB application program is directly calculated and called according to the stored control parameters.
By adopting the technical scheme, the invention has the following beneficial effects:
1. the linear normalization data processing mode can eliminate the influence caused by the dimension of each parameter index, and the constructed curve fitting relation can accurately reflect the corresponding relation between the thrust of the hydraulic cylinder of the ironing roller and the change of the rolling diameter.
2. The data such as experience parameters, design parameters and the like are extracted, processed and generalized to form a simple and practical industrial application tool, so that the tool is convenient and simple to use, and the design time cost is reduced.
Drawings
Figure 1 is a schematic diagram of the structure of an ironing apparatus.
In fig. 1: 1-a winding drum; 2-ironing rollers; 3-driving a swing arm; 4-swinging arms; 5-a bracket; 6-hydraulic cylinder.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic two-dimensional structure diagram of an ironing device of the present invention, which comprises a winding drum 1, an ironing roller 2, a driving swing arm 3, a swing arm 4, a bracket 5 and a hydraulic cylinder 6. The physical model of each part of the device is built through three-dimensional software Inventor, and a measuring tool in the software is utilized to obtain the gravity center and the force arm of the hydraulic cylinder 6, the driving swing arm 3 and the ironing roller 2, so that a basis is provided for the next calculation.
The hydraulic cylinder 6, the driving swing arm 3 and the ironing roller 2 are regarded as rotating around a fixed axis according to the law of conservation of angular momentum, the resultant force of the hydraulic cylinder 6, the driving swing arm 3 and the ironing roller is zero, and a relational expression T between the swing arm movement of the ironing roller device and the acting force is obtained * ＝(T 1 L 1 -T 2 L 2 -T 3 L 3 +FL 4 ) L, preset ironing force T 1 Calculating the thrust T of the hydraulic cylinder when the rolling diameters are changed * Obtaining the thrust T of the hydraulic cylinder of the ironing roller * Data corresponding to the winding diameters one by one are used for establishing the thrust T of the hydraulic cylinder of the ironing roller * Fitting a curve with the coil diameter and generating a polynomial fitting equation in the form of: y=ax 5 -bx 4 +cx 3 -dx 2 +ex-k, which represents the change in cylinder thrust during reeling of the roll.
Taking the coiling process of a coil from 500mm to 2000mm in diameter as an example, the thrust T of the hydraulic cylinder is calculated every 50mm * The preset ironing force is 8KN, and when different rolling diameters are calculated according to a deduction relation, the thrust value T of the hydraulic cylinder * And directly fitting to obtain a relational expression:
y＝(4E-15)x 5 -(3E-11)x 4 +(8E-8)x 3 -0.0001x 2 +0.079x 5 -8.469
converting the thrust value and the rolling diameter value of the hydraulic cylinder of the ironing roller into dimensionless values by using a linear normalization method, and performing polynomial curve fitting to obtain the following relational expression:
y＝8.374x 5 -30.28x 4 +43.62x 3 -31.395x 2 +11.243x-0.5974。
and carrying out reverse-carrying-in comparison on the two relational expressions to obtain a relational expression of fitting initial data, wherein the relational expression obtained after processing has larger difference, the hydraulic cylinder thrust corresponding to the coil diameter of 530mm is 11.98KN during deduction, and the initial data-carrying-in relational expression is carried out after coil diameter data are carried in to obtain a hydraulic cylinder thrust value which is 2.84KN different from the actual situation. The relation of data fitting after being processed by the normalization method is carried out to obtain the thrust value of the hydraulic cylinder as 11.994KN, and the difference of the thrust value of the hydraulic cylinder is 14N under the working condition, so that the accuracy of the relation of the established fitting curve is improved by the data normalization processing mode.
The hydraulic cylinder thrust calculation is provided with a program interface, a fitting curve relation established by the hydraulic cylinder thrust calculation of the required ironing device is input into a constructed VB program through the program interface, the rolling diameter, the ironing force and the like are set as input quantities, the thrust and the pressure of the oil cylinder are output quantities, calculation work is not needed in the next similar situation, and the hydraulic cylinder is directly set according to the stored control parameters.
Claims (1)
1. The utility model provides a method based on VB is used and is realized ironing roller pneumatic cylinder thrust calculation, contains reel, ironing roller, drive swing arm, support and pneumatic cylinder in ironing roller device, and the pneumatic cylinder of fixing on the support can apply ironing force to the reel through swing arm, drive swing arm and ironing roller, characterized by:
(1) constructing a physical model of each component according to basic parameters of each component in the ironing roller device and through three-dimensional software Inventor, and obtaining the gravity center of each component, the coordinate position of a rotation center and the length of each arm of force when the winding drum has different winding diameters by using a measuring tool in the three-dimensional software;
(2) according to the law of conservation of angular momentum, the hydraulic cylinder, the driving swing arm, the swing arm cantilever and the ironing roller are considered to rotate around a fixed axis and the resultant force of the hydraulic cylinder, the driving swing arm, the swing arm cantilever and the ironing roller is zero, and the relation is as follows:
T * ＝(T 1 L 1 -T 2 L 2 -T 3 L 3 +FL 4 )/L
in the above relation, T * -hydraulic cylinder thrust KN; t (T) 1 -the pressure KN of the ironing roller on the web; t (T) 2 -ironing roll gravity KN; t (T) 3 Driving the swing arm gravity KN; f-back pressure KN of the hydraulic cylinder; l (L) 1 -arm m of ironing force; l (L) 2 -moment arm m of the ironing roll gravity; l (L) 3 -a moment arm m driving the weight of the swing arm; the arm of force m of the L-hydraulic cylinder pressure;
(3) presetting ironing force T according to the relation (2) 1 Calculating the thrust T of the hydraulic cylinder when the rolling diameter is changed * And obtaining data of one-to-one correspondence of the thrust of the hydraulic cylinder of the ironing roller and the rolling diameter, and then carrying out dimensionless processing on the thrust value of the hydraulic cylinder and the rolling diameter value in a linear normalization mode, wherein the linear normalization mode has the following conversion function relation:
in the functional relation, x-is the sample data needing to be normalized, namely the hydraulic cylinder thrust value or the roll diameter, max (x) -the maximum value of the sample data, and min (x) -the minimum value of the sample data;
(4) and performing curve fitting on the linear normalized hydraulic cylinder thrust and the rolling diameter data by using a curve fitting tool to obtain a fitting curve relation between the hydraulic cylinder thrust and the rolling diameter as follows:
y＝ax 5 -bx 4 +cx 3 -dx 2 +ex-k
in the fitting curve relation, x and y respectively represent normalized parameters of the coil diameter and the thrust of the hydraulic cylinder, a, b, c, d and e are coefficients of various power terms, and k is a constant value;
(5) and (3) establishing the VB application program according to the fitting relation in the step (4), wherein the fitting calculation work is not needed when the similar situation is encountered next time, and the VB application program is directly calculated and called according to the stored control parameters.
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| CN111922092B (en) * | 2020-08-11 | 2022-02-22 | 洛阳万基铝加工有限公司 | Control method of ironing roller device |
| CN115569989A (en) * | 2022-10-09 | 2023-01-06 | 中铝河南洛阳铝箔有限公司 | Pressure control structure of ironing roller of aluminum foil mill and rolling staggered layer control method |
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| SU1014612A1 (en) * | 1981-07-28 | 1983-04-30 | Всесоюзный ордена Ленина научно-исследовательский и проектно-конструкторский институт металлургического машиностроения | Apparatus for automatic regulating of strip thickness |
| CN101139050A (en) * | 2007-10-17 | 2008-03-12 | 中色科技股份有限公司 | Ironing roller device and design method thereof |
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| US20090192674A1 (en) * | 2008-01-24 | 2009-07-30 | Gerald Frank Simons | Hydraulically propelled - gryoscopically stabilized motor vehicle |
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