System and method for flexible forming of three-dimensional curved surface parts with bosses

Abstract

The invention provides a flexible forming system and method for a three-dimensional curved-surface part with a boss. The method includes the steps that 1, digital-analog extraction is carried out on a target three-dimensional curved surface so as to obtain shape information of the target three-dimensional curved surface; 2, the shape of a multi-point forming die is adjusted according to the shape information of the target three-dimensional curved surface, and after the multi-point forming die is controlled to move, the corresponding curved surface in a target shape is formed; 3, flexible edge pressing treatment is carried out on a to-be-machined plate placed on the multi-point forming die; 4, multi-point opposite pressing forming is carried out on the to-be-machined plate; and 5, after single-point incremental forming treatment is carried out on the local position of the formed plate, the corresponding curved-surface boss is obtained. According to the system and the method, flexible and rapid forming of the three-dimensional curved-surface part is achieved; besides, the forming precision of the curved-surface boss is high, and the shape of the die can be adjusted in real time according to the shape of the curved surface; compared with a traditional die for three-dimensional curved-surfaces with bosses, the manufacturing cost is lower, and the efficiency is higher.

Description

technical field [0001] The invention relates to the field of mechanical molds, in particular to a system and method for flexible forming of three-dimensional curved surface parts with bosses. Background technique [0002] Aerospace is a typical multi-variety and small-batch industry. In order to meet the needs of aerospace low-cost rapid launch and market competition, the aerospace sheet metal parts have backward forming methods, low forming accuracy, poor forming method versatility, and low material utilization. , it is urgent to find a flexible general-purpose forming method to meet the forming requirements of three-dimensional aerospace sheet metal parts. At present, the three-dimensional skin parts with bosses in the domestic aerospace field are mainly realized by deep drawing and flanging. Both deep drawing and flanging require specific molds. Different types of spacecraft require different forming molds, and the cost of mold manufacturing is high. , long cycle time, a...

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, the traditional rigid mold forming can realize the forming of three-dimensional curved surface parts, but the forming accuracy cannot be effectively guaranteed, and manual shape correction is required; in addition, different shapes require different molds, which is costly for new product development or small batch parts development. long response cycle

The traditional deep drawing method can realize the boss forming, but the positioning is difficult, and the shape and position accuracy is difficult to guarantee

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