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A method for calculating the straightening force of a roller straightener by using the multipole boundary element method

A boundary element method, straightening machine straightening technology, applied in computing, special data processing applications, instruments, etc., can solve problems such as high degree of nonlinearity, influence of straightening effect, and influence on the establishment of straightening force model

Inactive Publication Date: 2017-04-05
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

At present, the numerical calculation method of the straightening force is mainly the finite element method, but because there are many factors affecting the straightening force, and the degree of nonlinearity is high, the finite element calculation results are not ideal
In turn, it affects the establishment of the straightening force model, and the straightening effect is also affected to a certain extent, which is not conducive to improving product quality and enhancing the competitiveness of enterprises

Method used

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  • A method for calculating the straightening force of a roller straightener by using the multipole boundary element method
  • A method for calculating the straightening force of a roller straightener by using the multipole boundary element method
  • A method for calculating the straightening force of a roller straightener by using the multipole boundary element method

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Embodiment Construction

[0117] This embodiment is used to illustrate the invention, but not to limit the invention in any way.

[0118] The experimental verification is carried out on the experimental platform of the 11-roll leveler in the laboratory. Q235 steel is selected as the straightening piece material. The straightening piece has a thickness of 40mm, a width of 600mm, an elastic modulus of 2.06E+11, a Poisson’s ratio of 0.3, and an inlet and outlet bending amount of -2.08mm / 0mm. The theoretically calculated straightening force is 1921.67KN, the measured straightening force is 1969.47KN, and the error between the measured straightening force and the calculated value is 2.49%.

[0119] The process is as follows:

[0120] (1) According to the product specification, use the formula (1) to obtain the offset of the neutral layer as 0.215mm, and calculate the straightening force calculation formula F including the offset of the neutral layer according to the formula (2) 1 1466.4KN;

[0121] (2) A...

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Abstract

The invention provides a method for calculating straightening force of a roller type straightening machine through a multi-pole boundary element method, and belongs to the technical field of roller type straightening. The method is characterized in that the method includes the steps of firstly, calculating and considering straightening force of deviation of a neutral layer, secondly, calculating and considering straightening force of the bauschinger effect, thirdly, using an independently developed three-dimensional elastic-plastic multi-object contact multi-pole boundary element method program package for calculating straightening force, finally, giving comprehensive consideration to the three factors, and utilizing weight, occupied in straightening force, of each factor to obtain the size of straightening force in the roller type straightening process at last. The method has the advantages that a more accurate straightening force calculating formula is obtained, theoretical support is provided for design of the straightening machine, straightening force calculation is more accurate, the straightening effect is improved effectively, and accordingly the product quality is improved.

Description

technical field [0001] The invention belongs to the technical field of roller straightening, and in particular relates to a method for calculating the straightening force of a roller straightening machine by using a multipolar boundary element method. Background technique [0002] The accuracy of the straightening force in roller straightening determines the quality of the straightening effect, the product quality of the plate, and finally determines the competitiveness of the enterprise in the plate market. At present, the numerical calculation method of the straightening force is mainly the finite element method, but because there are many factors affecting the straightening force, and the degree of nonlinearity is high, the result of the finite element calculation is not ideal. Then it affects the establishment of the straightening force model, and the straightening effect is also affected to a certain extent, which is not conducive to improving product quality and enhanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 桂海莲李强黄庆学李曜杨霞
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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