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Plate stamping springback control method and device

A control method and plate technology, applied in the direction of program control, computer control, general control system, etc., can solve problems such as poor precision of stamping springback control

Active Publication Date: 2020-07-10
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a control method and control device for stamping springback of sheet metal to solve or partially solve the technical problem that the existing springback compensation scheme has poor control accuracy of stamping springback

Method used

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  • Plate stamping springback control method and device
  • Plate stamping springback control method and device
  • Plate stamping springback control method and device

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Embodiment Construction

[0060] In order to enable those skilled in the technical field to which the application belongs to understand the application more clearly, the technical solutions of the application will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0061] For the existing springback compensation control scheme, the inventor has obtained the following research findings through a large number of simulations and experiments: the existing springback compensation scheme does not take into account the amount of springback compensation for the mold surface during the stamping process. Stress concentration and stress variation in . In essence, springback is the result of elastic deformation caused by the stress redistribution of the sheet after the mold is unloaded. This stress includes both external stress and internal stress. In the stamping process, the sheet often has stress concentration and stress distribution values. At the same tim...

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Abstract

The invention discloses a plate stamping springback control method which comprises the steps: obtaining performance parameters, including a Bauschinger effect material parameter, of a plate; constructing an initial mold profile comprising N grid nodes; inputting performance parameters, carrying out stamping simulation conducted on the plate, and obtaining the stress value of each grid node of theplate before springback and the springback amount of each grid node after springback; determining a potential deformation quantity at each grid node according to the stress value and the Bauschinger effect material parameter; determining a target compensation amount of each grid node according to the potential deformation amount and the springback amount, and compensating the initial mold profileto obtain a target mold profile; and according to the target mold profile, stamping and forming the plate. By means of the control method, the target mold profile meeting stamping springback precisioncontrol can be obtained more quickly and accurately, and the stamping simulation and design efficiency is improved.

Description

technical field [0001] The present application relates to the technical field of sheet metal forming, and in particular to a method and device for controlling springback of sheet metal stamping. Background technique [0002] Stamping of sheet metal is a common processing method for automobile panels, structural parts and other parts. For all metal sheets formed by stamping, there are different degrees of springback phenomena. Springback is the elastic recovery of materials in each deformation zone after the external load is removed during the sheet forming process. However, high-strength steel is widely used in automobile bodies and has high strength. Therefore, high-strength steel parts have obvious springback problems during the stamping process. When the rebound is severe, it will have a certain impact on the subsequent installation and other processes, and even cannot be installed normally. [0003] Numerical simulation is an important method to analyze and predict the...

Claims

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Application Information

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IPC IPC(8): G05B19/408B21D22/02
CPCB21D22/02G05B19/4086G05B2219/35356
Inventor 马闻宇杨建炜章军郑学斌王宝川姚野胡开广李春光张永强郝玉林
Owner SHOUGANG CORPORATION
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