Method for producing press-molded article

By performing shape analysis and mold correction on the blank of the stamped molded product, the drawing ribs are imparted, which solves the problem that changes in the blank shape affect the dimensional accuracy of the stamped molded product, and achieves higher yield and dimensional accuracy.

CN119730972APending Publication Date: 2025-03-28JFE STEEL CORP
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Patent Information

Application Number
CN202380060165.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2022-12-13
Filing Date
2023-08-14
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

During the stamping process, the blank collected from the metal plate with shape changes causes the dimensional accuracy of the stamped product to deviate from the target value, and it is difficult to determine the part with a greater impact.

Method used

By stamping the blank with a stamping mold, the shape of the reference stamping product is obtained first, and then the actual blank model is generated based on the shape change data of the actual blank, and the stamping and molding analysis is performed. The deviation between the reference shape and the actual shape is compared, the parts that need to be countermeasures are determined, and the mold and blank are corrected at these parts to give the deep-drawn ribs to improve the molding accuracy.

Benefits of technology

It effectively reduces the impact of changes in the shape of the blank on the dimensional accuracy of the stamped molded products, and improves the yield and dimensional accuracy of the stamped molded products.

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Abstract

The present invention provides a method for manufacturing a press-molded article, which reduces the influence of shape variation of a blank. This press-molded article manufacturing method is provided with: a reference press-molded article shape acquisition step for acquiring a reference press-molded article shape (5); a first actual blank press-molded product shape acquisition step for acquiring a first actual blank press-molded product shape (13); a first actual deviation amount acquisition step for obtaining a first actual deviation amount between the reference press-molded article shape (5) and the first actual blank press-molded article shape (13); a second actual blank press-molded product shape acquisition step for acquiring a second actual blank press-molded product shape (23); a second actual deviation amount acquisition step for obtaining a second actual deviation amount between the reference press-molded article shape (5) and the second actual blank press-molded article shape (23); a countermeasure-requiring part determination step for determining a countermeasure-requiring part; a draw bead applying step of applying a draw bead to the actual mold; and an actual press-forming step of performing press-forming using the actual die to which the draw bead has been imparted.
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