Method for computing an unfolded part of a modeled bended part of a 3d object

A method of manufacturing comprising:

• planning manufacturing of an object through wiping die bending based on a computer modeled 3D object, and including in the manufacturing at least a folding step;
• computing an unfolding of a folded part of said 3D object;
• determining a modification of the dimensions of the 3D object due to the unfolding of the folded part;
• and
• physically manufacturing said object based on the computer modeled 3D object, considering the modification of the dimensions of the 3D object due to the unfolding of the folded part, wherein the computing the unfolding being by:
• a) selecting a fixed portion (FP) of the 3D object;
• b) selecting a mobile portion (MP) of the 3D object;
• c) determining a 1D interface (INT) forming an intersection between the fixed portion (FP) and the mobile portion;
• d) computing a transformed portion resulting from a linear transformation of the mobile portion (MP);
• e) trimming the transformed portion in the vicinity of the 1D interface (INT), thereby forming a trimmed transformed portion (TTP);
• f) creating a fillet (FI) between the 1D interface (INT) and the trimmed transformed portion (TTP);
• and
• g) defining the unfolded part as a union of the fixed portion (FP), the trimmed transformed portion (TTP) and the created fillet (F1).

A computer program product, comprising:

• a non-transitory computer-readable data-storage medium (MEM1-MEM4), storing computer-executable instructions that cause a computer system to compute an unfolded part of a modeled bended 3D object in a 3D scene of a computer-aided design system;
• the computer executable instructions including instructions that cause the computer system to:
• a) provide the 3D object;
• b) select fixed portion (FP) of the 3D object;
• c) select a mobile portion (MP) of the 3D object;
• d) determine a 1D interface (INT) forming an intersection between the fixed portion (FP) and the mobile portion;
• e) compute a transformed portion resulting from a linear transformation of the mobile portion (MP);
• f) trim the transformed portion in the vicinity of the 1D interface (INT), thereby forming a trimmed transformed portion (TTP);
• g) create a fillet (FI) between the 1D interface (INT) and the trimmed transformed portion (TTP);
• and
• h) define the unfolded part as an union of the fixed portion (FP), the trimmed transformed portion (TTP) and the created fillet (FI).

A non-transitory computer-readable data-storage medium (MEM1-MEM4) comprising:

• a memory area containing computer-executable instructions (EXP) to cause a computer system to compute an unfolded part of a modeled bended 3D object in a 3D scene of a computer-aided design system by:
• a) providing the 3D object;
• b) selecting a fixed portion (FP) of the 3D object;
• c) selecting a mobile portion (MP) of the 3D object;
• d) determining a 1D interface (INT) forming an intersection between the fixed portion (FP) and the mobile portion;
• e) computing a transformed portion resulting from a linear transformation of the mobile portion (MP);
• f) trimming the transformed portion in the vicinity of the 1D interface (INT), thereby forming a trimmed transformed portion (TTP);
• g) creating a fillet (FI) between the 1D interface (INT) and the trimmed transformed portion (TTP);
• and
• h) defining the unfolded part as an union of the fixed portion (FP), the trimmed transformed portion (TTP) and the created fillet (F1).

A computer system comprising:

• a processor (CP) coupled to a memory (MEM1-MEM4) and a graphical user interface (KB, PD, DC, DY),
• the memory storing computer-executable instructions (EXP) that cause the computer system to compute an unfolded part of a modeled bended 3D object in a 3D scene of a computer-aided design system by:
• a) providing the 3D object;
• b) selecting a fixed portion (FP) of the 3D object;
• c) selecting a mobile portion (MP) of the 3D object;
• d) determining a 1D interface (INT) forming an intersection between the fixed portion (FP) and the mobile portion;
• e) computing a transformed portion resulting from a linear transformation of the mobile portion (MP);
• f) trimming the transformed portion in the vicinity of the 1D interface (INT), thereby forming a trimmed transformed portion (TTP);
• g) creating a fillet (FI) between the 1D interface (INT) and the trimmed transformed portion (TTP);
• and
• h) defining the unfolded part as an union of the fixed portion (FP), the trimmed transformed portion (TTP) and the created fillet (FI).