Method for judging setting of draw-bead in part drawing and moulding

Abstract

The invention relates to a method for setting and judging break beads for parts by draw forming. The method comprises the following steps: firstly, determining two sections of which the section difference is larger and the spacing between the sections is L; secondly, determining the section arc lengths between two profiled outlines are L1 and L2 and plan ranges between the two profiled outlines are a1 and a2; thirdly, calculating unilateral inflow volume of section materials: b1=(L1-1.06a1) / 2,b2=(L2-1.06a2) / 2, wherein 1.06 is the plastic deformation ratio of the section materials; fourthly, working out theta, according to a formula: tan theta is equal to |b1-b2| / L; and fifthly, setting a single reinforcement if the theta is less than 7 DEG, setting a double reinforcement if the theta is more than or equal to 7 DEG and less than or equal to 15 DEG, and providing design alteration of a product if the theta is more than 15 DEG. The method has simple mathematical calculation, less steps and amount of calculation, and fast and accurate determination; and the determination does not exceed ten minutes.

Description

technical field [0001] The invention relates to a judging method for drawing bead setting in part drawing forming. For those products with large cross-section differences at different positions, there will be wrinkles during the molding process. In order to eliminate this phenomenon, it is necessary to set drawbeads at the corresponding positions on the mold, and this method can quickly determine the drawbeads. Whether to set single or double ribs, or need to propose product design changes. Background technique [0002] Drawing-forming products have different shapes, and some products have large cross-sectional differences at different positions after forming, so there are different inflows. If it is not treated, if the difference in inflow is too large, it will cause wrinkles on the formed product . In order to eliminate this phenomenon, it is necessary to set drawbeads at the corresponding positions on the mold, and artificially adjust the flow of materials through the d...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings of the existing drawbead setting judgment method that takes a long time, the purpose of the present invention is to provide a new drawbead setting judgment method in part drawing forming, which can quickly determine whether the drawbead is Set up single ribs, double ribs, or need to propose product design changes

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