A Method for Automatic Arrangement of Section Lines of Process Supplementary Surface

Abstract

The invention discloses a method for automatically arranging section lines of an addendum surface. The method is characterized by comprising the following steps that S1, a boundary curve (3) of a part(1) and a parting line (4) are projected to a plane perpendicular to a stamping direction in the stamping direction; S2, the maximum distance between the boundary curve (3) of the part (1) and the parting line (4) after projection is determined; S3, the maximum distance is used as the radius value of a rolling circle (6), a circle rolling algorithm is implemented on the outer side of the boundarycurve (3) of the part (1), and a new boundary curve (3') is formed; S4, the rolling circle radius and the parting line (4) intersect to obtain a mapping relation (7) between points on the new boundary curve (3') of the part (1) and points on the parting line (4); and S5, and the section lines (8) are arranged between the new boundary curve (3') of the part (1) and the parting line (4). Through the method, the section lines which are projected in the stamping direction without interference can be obtained.

Description

technical field [0001] The invention relates to the field of process design and manufacture of automobile panels, and more specifically, relates to a method for automatically arranging the direction of section lines for avoiding the overlapping of technical supplementary surfaces of automobile panels. Background technique [0002] In the process of supplementary surface design of automobile panel technology, the method of arranging 2D section lines is often used to control the shape of supplementary surface. The core problem of arranging the section lines is how to avoid the interference between the section lines, that is, on the plane perpendicular to the stamping direction, the projections of two section lines intersect. This will lead to overlapping curved surfaces in the stamping direction on the process supplementary surface, which is absolutely not allowed in the stamping process design. A method of arranging section lines is disclosed in US Patent Application Publica...

AI Technical Summary

Problems solved by technology

Although this method takes into account the influence of the direction of the section line on the deformation of the part, it does not consider the interference between the section lines. Interference between the section lines may occur in the recessed position of the part, resulting in overlapping of the process supplementary surface in the stamping direction. Make subsequent design and manufacturing difficult and easy

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