Design method of high-strength steel multi-roll roll number
By calculating the number of straightening rollers n, the residual stress of high-strength steel is controlled within the target range, solving the problem of excessive stress in the straightening material and optimizing material quality and equipment cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WISDRI ENG & RES INC LTD
- Filing Date
- 2023-06-08
- Publication Date
- 2026-06-02
Smart Images
Figure CN116586459B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of straightening machine design technology, and in particular to a design method for the number of high-strength steel multi-roller straightening rollers. Background Technology
[0002] Currently, in the metallurgical industry, the purpose of straightening is to improve the bending radius of raw materials, achieving a target bending radius, and in many cases, leveling, meaning the bending radius after straightening is infinitely large. With the development of materials technology and increasingly stringent requirements for the intrinsic properties of materials, the yield strength of materials is increasing, as is the residual stress within the materials themselves. Similarly, higher requirements are placed on the residual stress after straightening, generally requiring that the total residual stress of the material not exceed a standard value. The residual stress of a material affects its surface quality, performance, and stability.
[0003] However, there is no reasonable method in the existing technology to determine the number of rollers for high-strength steel multi-roll straightening. If the design of the number of rollers for high-strength steel multi-roll straightening is unreasonable, it will lead to excessive residual stress in the straightened material. Summary of the Invention
[0004] The main objective of this invention is to provide a design method for the number of rollers in a multi-roller straightening process for high-strength steel, which aims to facilitate the rational determination of the number of rollers in order to effectively reduce the residual stress of the straightened material.
[0005] To achieve the above objectives, the present invention provides a method for designing the number of high-strength steel multi-roll straightening rolls, comprising the following steps:
[0006] Determine the dimensions of the straightening rolls, the mechanical properties of the steel to be straightened, and the target residual stress value σ. p ;
[0007] Based on the size information of the straightening roller and the mechanical property information of the steel to be straightened, the calculation formulas for the maximum surface residual stress value σ1 and the maximum internal residual stress value σ2 of the steel to be straightened are determined.
[0008] Since both the maximum surface residual stress value σ1 and the maximum internal residual stress value σ2 are less than the target residual stress value σ p Determine the number of straightening rollers.
[0009] Preferably, the dimensional information of the straightening roller includes the original curvature ratio C0 of the straightening roller.
[0010] Preferably, the mechanical property information of the steel to be straightened includes the yield strength σ of the steel to be straightened. s And the original residual stress σ0.
[0011] Preferably, the maximum surface residual stress value σ1 is calculated using the following formula:
[0012]
[0013] Where n is the number of straightening rollers, C w This is the reverse bending ratio of the straightening roller.
[0014] Preferably, the maximum internal residual stress value σ2 is calculated using the following formula:
[0015]
[0016] Preferably, the maximum surface residual stress value σ1 and the maximum internal residual stress value σ2 are both less than the target residual stress value σ. p The specific steps for determining the number of straightening rollers include:
[0017] Initially determine the reverse curvature ratio C of the straightening roller w ;
[0018] By determining the inverse bending ratio C w The maximum internal residual stress value σ2 is calculated, and it is then determined whether the maximum internal residual stress value σ2 is less than the target residual stress value σ. p ;
[0019] When the maximum internal residual stress value σ2 is greater than or equal to the target residual stress value σ p If so, then return to the initial determination of the anti-bending ratio C of the straightening roller. w The steps to correct the inverse curvature ratio C w ;
[0020] When the maximum internal residual stress value σ2 is less than the target residual stress value σ p When, the determined inverse curvature ratio is C w Substituting into the formula for calculating the maximum surface residual stress σ1, based on the fact that σ1 is less than the target residual stress σ... p Calculate the number of straightening rollers, n.
[0021] Preferably, the anti-bending rate of the straightening roller is greater than that of C. w Between 1 and 3.
[0022] Preferably, based on σ1 being less than the target residual stress value σ p When calculating the number of straightening rolls n, based on the fact that σ1 is less than σ p Choose the minimum number of rollers n.
[0023] The design method for the number of high-strength steel multi-roll straightening rollers proposed in this invention can rationally determine the number of straightening rollers, thereby effectively reducing the residual stress in the straightened material. Furthermore, the number of rollers determined by this design method can minimize equipment costs while meeting straightening requirements. Attached Figure Description
[0024] Figure 1 This is a flowchart illustrating the design method for the number of high-strength steel multi-roll straightening rollers according to the present invention.
[0025] Figure 2 for Figure 1 The detailed flowchart of step S3 is shown.
[0026] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0027] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
[0028] It should be noted that in the description of this invention, the terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0029] Reference Figure 1 In this preferred embodiment, a method for designing the number of high-strength steel multi-roll straightening rolls includes the following steps:
[0030] Step S1: Determine the dimensional information of the straightening roller, the mechanical property information of the steel to be straightened, and the target residual stress value σ. p ;
[0031] Step S2: Based on the size information of the straightening roller and the mechanical property information of the steel to be straightened, determine the calculation formulas for the maximum surface residual stress value σ1 and the maximum internal residual stress value σ2 of the steel to be straightened.
[0032] Step S3, based on the fact that both the maximum surface residual stress value σ1 and the maximum internal residual stress value σ2 are less than the target residual stress value σ p Determine the number of straightening rollers.
[0033] Specifically, the dimensional information of the straightening roll includes the original curvature ratio C0 of the straightening roll. The mechanical property information of the steel to be straightened includes the yield strength σ of the steel to be straightened. s And the original residual stress σ0.
[0034] Step S2, the maximum surface residual stress value σ1 is calculated using the following formula:
[0035]
[0036] Where n is the number of straightening rollers, C w This is the reverse bending ratio of the straightening roller.
[0037] The maximum internal residual stress value σ2 is calculated using the following formula:
[0038]
[0039] Reference Figure 2 Step S3 specifically includes:
[0040] Step S31, initially determine the reverse bending ratio C of the straightening roller. w ;
[0041] Step S32, by determining the reverse bending ratio C w The maximum internal residual stress value σ2 was calculated.
[0042] Step S33: Determine whether the maximum internal residual stress value σ2 is less than the target residual stress value σ. p (target residual stress value σ) p (This refers to the desired stress value after straightening by the straightening rollers); when the maximum internal residual stress value σ2 is greater than or equal to the target residual stress value σ p If the condition is met, return to step S31 to correct the inverse curvature ratio C. w When the maximum internal residual stress value σ2 is less than the target residual stress value σ p When the time comes, proceed to step S34;
[0043] Step S34, the determined inverse curvature ratio C w Substituting into the formula for calculating the maximum surface residual stress σ1, based on the fact that σ1 is less than the target residual stress σ... p Calculate the number of straightening rollers, n.
[0044] Specifically, in step S31, the reverse bending rate of the straightening roller is greater than C. w Between 1 and 3. C w The larger the value, the greater the energy consumption of the equipment; the larger the equipment, the higher the cost. Therefore, under the condition of satisfying the formula, the smaller value should be selected.
[0045] Based on σ1 being less than the target residual stress value σ p When calculating the number of straightening rolls n, based on the fact that σ1 is less than σ p Choose the minimum number of rollers n. Because a larger number of rollers n results in a larger and more expensive device, it's necessary to choose the minimum value while still satisfying the formula. n is an integer.
[0046] In step S3, σ1 and σ2 need to be designed to be as close as possible to σ.p This can minimize C. w The smaller these two values are, the lower the cost of designing a straightening machine.
[0047] The design method for the number of high-strength steel multi-roll straightening rollers proposed in this invention can rationally determine the number of straightening rollers, thereby effectively reducing the residual stress in the straightened material. Furthermore, the number of rollers determined by this design method can minimize equipment costs while meeting straightening requirements.
[0048] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.
Claims
1. A method for designing the number of high-strength steel multi-roll straightening rolls, characterized in that, Includes the following steps: Determine the dimensions of the straightening rolls, the mechanical properties of the steel to be straightened, and the target residual stress value. ; Based on the dimensional information of the straightening rollers and the mechanical property information of the steel to be straightened, the maximum surface residual stress value of the steel to be straightened is determined. and maximum internal residual stress value The calculation formula; Based on the maximum surface residual stress value and maximum internal residual stress value All are less than the target residual stress value Determine the number of straightening rollers; The dimensional information of the straightening rolls includes the original curvature ratio of the straightening rolls. ; The mechanical property information of the steel to be straightened includes the yield strength of the steel. and original residual stress The maximum surface residual stress value Calculate using the following formula: ； Where n is the number of straightening rollers, The inverse bending ratio of the straightening roller; The maximum internal residual stress value Calculate using the following formula: ； The maximum surface residual stress value and maximum internal residual stress value All are less than the target residual stress value The specific steps for determining the number of straightening rollers include: Initially determine the reverse bending ratio of the straightening rollers ; By determining the reverse curvature ratio The maximum internal residual stress value was calculated. ; Determine the maximum internal residual stress value Is it less than the target residual stress value? ; When the maximum internal residual stress value Greater than or equal to the target residual stress value If so, then return to the initial determination of the anti-bending ratio of the straightening roller. The steps to correct the inverse curvature ratio ; When the maximum internal residual stress value Less than the target residual stress value When, the determined inverse curvature ratio will be... Substitute the maximum surface residual stress value In the calculation formula, based on the maximum surface residual stress value Less than the target residual stress value Calculate the number of straightening rollers, n.
2. The design method for the number of high-strength steel multi-roll straightening rolls as described in claim 1, characterized in that, The straightening roller's reverse bending ratio Between 1 and 3.
3. The design method for the number of high-strength steel multi-roll straightening rolls as described in claim 1 or 2, characterized in that, Based on the maximum surface residual stress value Less than the target residual stress value When calculating the number of straightening rolls n, the maximum surface residual stress value is used as a reference. Less than the target residual stress value Choose the minimum number of rollers n.