Segment-by-segment forming method for large curved surface adopting discrete die

Abstract

The invention provides a segment-by-segment forming method for a large curved surface adopting a discrete die. A large 3D curved-surface part is difficult in forming, and in a conventional integral stamping forming method, a large die is needed, large or extra-large table facet machining equipment is required, and therefore, the production cost of large 3D curved-surface parts is extremely high. According to the invention, a set of discrete profile adjustable die is adopted, a to-be-formed large curved surface is sequentially divided into a plurality of segments with size equal to that of the forming area of the die; during forming of each segment, the discrete die is divided into an effective forming area and a forming transition area; and by reasonably designing the profile shape of the die of the forming transition area, deformation of joint part of adjacent forming segments are in uniform transition, so as to avoid production of forming defects, and the large curved-surface part is finally obtained after segment-by-segment forming. The method disclosed by the invention only needs one set of discrete die, and with small equipment, large-size parts can be formed, and quick machining of large curved-surface parts with low cost can be achieved.

Description

technical field [0001] The invention belongs to the field of metal plastic processing, and relates to a sheet material forming method, which is suitable for fast and low-cost processing of large three-dimensional curved surface parts. Background technique [0002] At present, there is an increasing demand for large three-dimensional curved surface parts in the manufacturing fields of ships, airplanes, high-speed trains, chemical containers, etc., as well as in modern architectural structures and urban sculptures. Mold forming has good quality and high precision, and is an effective method for processing curved surface parts. However, the size of the curved surface processed by the traditional integral forming method cannot exceed the forming area of ​​the mold. Therefore, large-scale curved surface parts require large molds and large table processing equipment. Due to the high cost of large-scale mold manufacturing, the high cost of large-scale equipment, and the high produc...

AI Technical Summary

Problems solved by technology

Mold forming has good quality and high precision, and is an effective method for processing curved surface parts. However, the size of the curved surface processed by the traditional integral forming method cannot exceed the forming area of ​​the mold. Therefore, large-scale curved surface parts require large molds and large table processing equipment. Due to the high cost of large-scale mold manufacturing, the high cost of large-scale equipment, and the high production cost of large-scale three-dimensional curved surface parts, especially when the large-scale curved surface exceeds a certain size, such as tens of meters or tens of meters, there are technical problems in manufacturing super-large table processing equipment. Difficulties that cannot be realized by the integral forming method

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