Multipoint continuous serging forming method

Abstract

The invention discloses a multipoint continuous serging forming method. The method comprises the following steps of (1), mold modeling adjusting and feeding, wherein the distance and height between an upper mold and a lower mold are set according to the area and relevant size of a serging inner plate, and the inner plate and an outer plate are arranged on corresponding stations; (2), plate forming, wherein pressurized forming is conducted on the inner plate and the outer plate in the first step; (3), plate forming flanging, wherein a flanging pressing head is upwards fed, and the formed outer plate is bent; (4), pre-serging, wherein longitudinal pressure is provided by a serging pressing head, a serging punching head is transversely fed according to different speeds to promote the flanged outer plate to be evenly subjected to plastic deformation; (5), final serging, wherein an instantaneous forming surface which is momentarily changed is formed by a final forming pressing head, a longitudinal load is exerted on partial region of the outer plate, pressure maintaining is conducted for a period of time, complete attaching is achieved, and covered edges with certain shapes are formed; and (6) reshaping. According to the multipoint continuous serging forming method, the production cycle of products is significantly shortened, the production cost is reduced, and the competitiveness of the products is improved.

Description

Technical field [0001] The invention relates to the field of mechanical processing, in particular to a multi-point continuous hemming forming method. Background technique [0002] With the development of society, complex hyperbolic metal sheets are increasingly used in many industries such as aircraft, ships, automobiles and even construction. While improving the quality of sheet products, people began to pay more attention to the aesthetic diversity and structural strength of products. Especially in the field of automobile manufacturing, the requirements for its appearance and life are becoming more and more stringent. It can effectively hide the sharp edges through edging, improve the safety and appearance quality of the panel, and at the same time can effectively extend the service life of the panel and improve its market competitiveness. [0003] Hemming process is an assembly process that connects the inner and outer plates of the part after bending and flattening the upper o...

AI Technical Summary

Problems solved by technology

At present, there are three ways to achieve sheet metal hemming, manual hemming, press hemming and robot rolling hemming technology, manual hemming accuracy is difficult to guarantee, low efficiency, generally not used; traditional press hemming can be formed at one time, However, there are disadvantages such as large area occupation and high energy consumption. For different products, different molds need to be replaced to achieve it. It has poor adaptability, high cost, and poor product competitiveness. Smaller, but the main problem is that the sheet needs to be rolled in multiple passes, and the production efficiency is low, so it cannot be used in mass production

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