JP2008062280A5

JP2008062280A5 -

Info

Publication number: JP2008062280A5
Application number: JP2006244351A
Authority: JP
Filing date: 2006-09-08
Publication date: 2009-01-08
Anticipated expiration: 2026-09-08

Claims

Press molding analysis step to obtain the molding data of the press molded product by numerical analysis of the molding conditions of the press molding,
Of the molding data of the press-molded product, a curvature and / or angle is calculated for the press-molded product, a region of the molded product is divided based on the curvature and / or angle, and the molding data is divided for each divided region. An arithmetic processing step for performing arithmetic processing on at least one of a physical property value and a physical quantity in a partial area determined to perform arithmetic processing based on
A springback amount calculating step for calculating a springback amount based on a result of the arithmetic processing;
A method for identifying the cause of occurrence of springback, comprising:

2. The calculation processing step according to claim 1, wherein the calculation processing step performs calculation processing on at least one of the physical property value / physical quantity variable of at least one of the integration points of the divided region having a relatively large curvature and / or angle. How to identify the cause of springback.

3. The method for determining the cause of springback occurrence according to claim 1, wherein the physical property value and the physical quantity are a plate thickness, an elastic coefficient, a plastic coefficient, a stress component value, and a strain component value.

The step of specifying the region, the physical property value, and the physical amount when the springback amount is minimized by repeatedly performing the calculation processing step and the springback amount calculation step while changing the partial region. The spring back generation | occurrence | production cause identification method as described in any one of 1-3.

The calculation processing step and the springback amount calculating step are performed by repeatedly performing at least one of the physical property value and the physical quantity, and / or changing the calculation processing, so that the region when the springback amount is minimized, The method for specifying the cause of springback occurrence according to any one of claims 1 to 4, further comprising a step of specifying a physical property value and a physical quantity.

A press molding analysis unit that numerically analyzes the molding conditions of press molding and obtains molding data of the press molded product,
Of the molding data of the press-molded product, a curvature and / or angle is calculated for the press-molded product, a region of the molded product is divided based on the curvature and / or angle, and the molding data is divided for each divided region. An arithmetic processing unit that performs arithmetic processing on at least one of a physical property value and a physical quantity variable in a partial area determined to perform arithmetic processing based on
A springback analyzer that calculates a springback amount based on the result of the arithmetic processing;
A device for identifying the cause of springback occurrence, comprising:

The physical property value and physical quantity in the divided region having a relatively large curvature and / or angle are the physical property value and physical quantity of at least one integration point of the divided region having a relatively large curvature and / or angle. Item 7. The apparatus for identifying the cause of springback occurrence according to Item 6.

The spring back generation cause identifying device according to claim 6 or 7, wherein the physical property value and the physical quantity are a plate thickness, an elastic coefficient, a plastic coefficient, a stress component value, and a strain component value.

The arithmetic processing unit and the springback analysis unit repeatedly calculate the result of the arithmetic processing and the springback amount while changing the partial area, so that the arithmetic processing unit has the smallest springback amount. The spring back generation | occurrence | production cause specific device as described in any one of Claims 6-8 which specifies the said area | region, physical property value, and physical quantity when becoming.

The arithmetic processing unit and the springback analyzing unit repeatedly calculate the result of the arithmetic processing and the springback amount by changing the physical property value and the physical quantity and / or the arithmetic processing, thereby calculating the arithmetic processing unit. The apparatus for identifying the cause of springback occurrence according to any one of claims 6 to 9, wherein the region, the physical property value, and the physical quantity when the amount of springback is the smallest are specified.

A press molding analysis procedure for numerically analyzing press molding molding conditions to obtain molding data of a press molded product,
Of the molding data of the press-molded product, a curvature and / or angle is calculated for the press-molded product, a region of the molded product is divided based on the curvature and / or angle, and the molding data is divided for each divided region. An arithmetic processing procedure for performing arithmetic processing on at least one of a physical property value and a physical quantity in a partial area determined to perform arithmetic processing based on
A springback amount calculation procedure for calculating a springback amount based on a result of the arithmetic processing;
A program for determining the cause of springback, which causes a computer to execute

The springback generation according to claim 11, wherein the arithmetic processing procedure performs arithmetic processing on at least one of the physical property value and the physical quantity variable of the integration point of the divided region having a relatively large curvature and / or angle. Cause specific program.

A numerical analysis program for calculating the molding conditions of press molding, calculating the molding data of the press molding and the amount of springback, and a springback occurrence cause identifying program capable of inputting and outputting data,
A procedure for acquiring the molding data from the numerical analysis program;
Of the molding data of the press-molded product, a curvature and / or angle is calculated for the press-molded product, a region of the molded product is divided based on the curvature and / or angle, and the molding data is divided for each divided region. An arithmetic processing procedure for performing arithmetic processing on at least one of a physical property value and a physical quantity in a partial area determined to perform arithmetic processing based on
A procedure for outputting the result of the arithmetic processing to the numerical analysis program and calculating the springback amount;
A program for determining the cause of springback, characterized by causing a computer to execute.

14. The calculation processing procedure according to claim 13, wherein the calculation processing procedure performs calculation processing on at least one of the physical property value and the physical quantity variable of the integration point of the divided region having a relatively large curvature and / or angle. Springback occurrence cause identification program.

A computer-readable recording medium on which the computer program according to claim 11 is recorded.