CN110162907B - Method for obtaining window values of parameters representing sheet formability by numerical simulation research - Google Patents
Method for obtaining window values of parameters representing sheet formability by numerical simulation research Download PDFInfo
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- CN110162907B CN110162907B CN201910457677.0A CN201910457677A CN110162907B CN 110162907 B CN110162907 B CN 110162907B CN 201910457677 A CN201910457677 A CN 201910457677A CN 110162907 B CN110162907 B CN 110162907B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
Abstract
The invention discloses a method for obtaining a window value representing a sheet formability parameter by using numerical simulation, which scientifically and efficiently obtains the window value representing the sheet formability by using a simulation experiment, guides a sheet supplier to optimize a process, reduces the sheet output of parameters near the highest point of normal distribution and near the 95% value, and provides data support for reducing cost and stabilizing sheet production.
Description
Technical Field
The invention relates to a method for obtaining window values of various parameters for representing the formability of a plate by utilizing numerical simulation research.
Background
The stamping and forming of the plate is particularly important in the automobile manufacturing as an important manufacturing technology, about 70 percent of raw materials required for producing an automobile are steel materials, and almost all the steel materials (such as automobile outer plates, structural members, parts and the like) need to be obtained by stamping and forming the plate, so that the upgrading of the stamping performance of the plate plays an important role in transformation and upgrading of the automobile industry. The quality of an automobile and the deep drawing performance of a plate used by the automobile are extremely related, and correspondingly, the mastering of the stamping performance of the plate product is lost, and the cooperation opportunity of enterprises with stamping requirements, such as the automobile industry and the like, is lost in the industrial upgrading. In the field of plate stamping and forming, due to the lack of a systematic accurate formability theory and a corresponding testing technology, defects occurring in production need to be solved through repeated experiments, and a numerical simulation technology is a high-efficiency and rapid research mode and can obtain comprehensive experimental data in each experiment. However, at present, most automobile main engine plants use stamping simulation to provide technical support for stamping process, and the increasingly popular plate stamping simulation of plate manufacturers is to do some work for the popularization and butt joint of the main engine plants, and is rarely used for the research of various parameters of plate forming.
Disclosure of Invention
The invention aims to provide a method for obtaining window values of various parameters for representing the formability of a plate by using numerical simulation research, which is suitable for being used when a plate manufacturer carries out numerical simulation evaluation on the formability of a product, and the forming performance of the produced plate on a certain part can be mastered in a short time without using a physical experiment.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for obtaining window values of parameters for characterizing sheet formability by numerical simulation research comprises the following steps:
s1, counting large data of the plate performance as much as possible by using an ERP system, calling the content of the large data, and obtaining a normal distribution graph by using a least square method;
s2, taking the minimum value of the range of 95% of the central axis as a value representing the lowest performance of the plate, and taking the minimum value of the range of 68.27% as a value representing the high performance of the plate;
s3, selecting a part stamped by using the grade material as an experimental model;
s4, respectively making experiments with experiment schemes of 'highest value' for each parameter and 'lowest value' for each parameter, and observing experiment results;
s5, if the lowest value experiment reaches the qualified standard, the performance of the material is considered to completely meet the requirement, and the value at 95% is considered as the lower limit of the window value; if the highest value experiment is unqualified, the whole material can be considered to be not in accordance with the use standard; if the highest value experiment and the lowest value experiment are qualified, the next part of experiment can be started;
and S6, averaging the lowest value and the highest value, taking the average value as a reference value of each parameter, and testing the window value of each parameter one by using a control variable method.
Further, when the minimum value of the range of 95% of the central axis is taken as the value representing the lowest performance of the plate in the step S2, the extreme value of the lowest point is excluded.
Further, when the minimum value of the vicinity of the central axis, which occupies a range of 68.27%, is taken as a value representing high performance of the plate in step S2, the error that the mutual exclusion parameter reaches an extreme value at the same time is eliminated.
Compared with the prior art, the invention has the beneficial technical effects that:
the method has the advantages that the window value of plate forming is obtained through a simulation experiment scientifically and efficiently, a plate supplier is guided to optimize the process, plate output of parameters near the highest point of normal distribution and near the 95% value is reduced, and data support is provided for reducing cost and stabilizing plate production. Meanwhile, the minimum value of 95% of the area near the central axis is taken as the value representing the lowest performance of the plate, and the minimum value of 68.27% of the area is taken as the value representing the high performance of the plate, so that the accuracy is better.
Detailed Description
The invention utilizes a numerical simulation means to carry out simulation experiments and researches the window values and the matching relationship of each parameter corresponding to the forming performance of the plate.
A method for obtaining window values of parameters for characterizing the formability of a plate by utilizing numerical simulation research comprises the following steps:
s1, counting large data of the plate performance as much as possible by using an ERP system, calling the content of the large data, and obtaining a normal distribution graph by using a least square method; s2, taking the minimum value which can occupy 95% of the range near the central axis as a value representing the lowest performance of the plate (excluding the extreme value of the lowest point), and taking the minimum value in the range of 68.27% as a value representing the high performance of the plate (excluding the error that the mutual exclusion parameter simultaneously reaches the extreme value); s3, selecting a part stamped by using the grade material as an experimental model; s4, respectively making an experiment scheme that each parameter is ' highest value ' (hereinafter referred to as a highest value experiment) and ' each parameter is ' lowest value ' (hereinafter referred to as a lowest value experiment), and observing an experiment result; s5, if the lowest value experiment reaches the qualified standard and the performance of the material is approximately considered to completely meet the requirements, the value at 95 percent is considered as the lower limit of the window value; if the highest value experiment is unqualified, the whole material can be considered to be not in accordance with the use standard; if the highest value experiment and the lowest value experiment are qualified, the next part of experiment can be started; and S6, averaging the lowest value and the highest value, taking the average value as a reference value of each parameter, and testing the window values of each parameter one by using a control variable method.
The invention scientifically and efficiently utilizes the simulation experiment to obtain the window value of plate forming, guides a plate supplier to optimize the process, reduces the plate output of parameters near the highest point of normal distribution and near the 95% value, and provides data support for reducing the cost and stabilizing the plate production. Meanwhile, the minimum value of 95% of the range near the central axis is used as the value representing the lowest performance of the plate, and the minimum value of 68.27% of the range is used as the value representing the high performance of the plate, so that the accuracy is better.
The above-described embodiments are only intended to illustrate the preferred embodiments of the present invention, and not to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (3)
1. A method for obtaining a window value of a characteristic sheet formability parameter by using numerical simulation is characterized by comprising the following steps:
s1, counting large data of the plate performance as much as possible by using an ERP system, calling the content of the large data, and obtaining a normal distribution graph by using a least square method;
s2, taking the minimum value of the range of 95% of the central axis as a value representing the lowest performance of the plate, and taking the minimum value of the range of 68.27% as a value representing the high performance of the plate;
s3, selecting a part stamped by using the plate material as an experimental model;
s4, respectively making an experiment scheme that each parameter is ' highest value ', ' each parameter is ' lowest value ', and observing an experiment result;
s5, if the lowest value experiment reaches the qualified standard, the performance of the material is considered to completely meet the requirement, and the value at 95% is considered as the lower limit of the window value; if the highest value experiment is unqualified, the whole material can be considered to be not in accordance with the use standard; if the highest value experiment and the lowest value experiment are qualified, the next part of experiment can be started;
and S6, averaging the lowest value and the highest value, taking the average value as a reference value of each parameter, and testing the window values of each parameter one by using a control variable method.
2. The method for obtaining the window value of the parameters characterizing the formability of the sheet material through numerical simulation according to claim 1, wherein, when the minimum value which accounts for 95% of the range near the central axis is taken as the value representing the lowest performance of the sheet material in step S2, the extreme value of the lowest point is excluded.
3. The method for obtaining the window value of the characteristic sheet formability parameter by using the numerical simulation as claimed in claim 1, wherein the error that the mutual exclusion parameter reaches the extreme value at the same time is eliminated when the minimum value of the 68.27% range near the central axis is taken as the value representing the high performance of the sheet in the step S2.
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| CN112231892B (en) * | 2020-09-09 | 2022-11-18 | 包头钢铁（集团）有限责任公司 | Qualitative and quantitative analysis method for comprehensively evaluating reliability of stamping simulation result |
| CN113418759A (en) * | 2021-05-14 | 2021-09-21 | 包头钢铁（集团）有限责任公司 | Test method of thermal simulation sample |
| CN113686293A (en) * | 2021-08-18 | 2021-11-23 | 包头钢铁（集团）有限责任公司 | Method for representing plate forming flow state |
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