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A method of optimizing blanking process parameters

A technology of process parameters and punching, which is applied in the field of optimizing punching process parameters, and can solve problems such as restricting punching production

Active Publication Date: 2021-01-19
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is only limited to the study of the influence of a specific process parameter on the quality of the blanking section and the punching force under specific circumstances, and rarely involves the coupling effect between multiple process parameters, which restricts the actual blanking production.

Method used

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  • A method of optimizing blanking process parameters
  • A method of optimizing blanking process parameters
  • A method of optimizing blanking process parameters

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Experimental program
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Embodiment 1

[0050] This embodiment provides a method for optimizing blanking process parameters.

[0051] The method includes the following steps:

[0052] 1) Carry out punching process test: This step can be carried out on a special press or a self-designed punching device on a tensile testing machine, and simultaneously record the punching force-stroke curve. After punching, the measurement includes collapse angle, brightness The size of the characteristic area of ​​each punching section including the band, fracture zone and burr; this embodiment uses a self-designed punching test device, such as figure 2 As shown, it was installed on the tensile testing machine for punching test. Among them, the diameters of the punch and die are 5.00mm and 5.15mm, the fillet radius is 0.05mm, the punching speed is 20mm / s, the sheet material used is 1.0mm thick non-oriented silicon steel, and the constitutive relation is where the reference strain rate

[0053] 2) Establish a blanking finite ele...

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Abstract

The invention belongs to the field of plastic processing, in particular to a method for optimizing blanking process parameters. The method comprises the following steps: (1) constructing a punching finite element model to carry out solid modeling of the punching process, the punching finite element model uses a shear modified GTN model to characterize the material damage evolution behavior in the punching process; (2) different The combination of punching process parameters is input into the finite element model, and the target optimization amount is output to obtain multiple sets of punching process parameters and corresponding target optimization amount data to form a database; (3) combine the database, train the artificial neural network model to obtain the target optimization The functional mapping relationship between the quantity and the punching process parameters is used to construct the target optimization quantity prediction model. The invention has the characteristics of high prediction accuracy, fast response speed, strong operability, etc., can accurately predict the influence of multiple process parameters coupling on the punching process, and optimize the process parameters.

Description

technical field [0001] The invention belongs to the field of plastic processing, in particular to a method for optimizing blanking process parameters. Background technique [0002] Punching is an important processing method that breaks and separates the sheet metal by means of a mold to obtain the required shape and size of the part. It belongs to the stamping process. Compared with other plastic processing methods, stamping has the advantages of high production efficiency, low processing cost, high product dimensional accuracy and simple operation, so it is widely used in industrial fields such as automobile, aerospace, shipbuilding and electronic appliances. According to statistics, in the automobile manufacturing industry, about 60% to 70% of auto parts are produced by sheet metal stamping. Manufacturing costs and the development cycle of new models. [0003] From the perspective of industrial application, the quality of cross section is the most important index to eval...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23
CPCG06F30/23
Inventor 刘倩李佳凝张荣华郑小平田亚强陈连生
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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