Molding process of five-meter scalloped segment of carrier rocket

Abstract

The invention provides a molding process of a five-meter scalloped segment of a carrier rocket. A previous secondary stretch forming process is changed, the stretch forming rate is increased, and thequick primary stretching forming process is adopted. The molding process comprises the steps of blanking; quenching heat treatment; stretch forming; allowance removal and finishing; artificial aging;chemical milling; machining; surface treatment; and packaging and delivery. The stretch forming process specifically comprises the steps of pre-judging various types of stretch forming trajectories and stress and wall thickness distribution change under the stretch forming rate in advance through analog simulation, and carrying out discretization treatment on transverse and longitudinal displacement through the transverse and longitudinal small-displacement progressive stretch forming trajectories to make the transverse and longitudinal displacement uniformly distributed in the whole stretch forming process. According to the molding process, the quick one-time stretch forming technology is adopted, and machining parameters are optimized; on the premise of ensuring the machining precision and surface quality of the five-meter scalloped segment, the production efficiency of products is improved to the maximum extent, the forming time of the products is shortened from 3.5 h to 1.5 h, andthe production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of carrier rocket melon petal processing, and in particular relates to a forming process of a 5-meter-level melon petal of a carrier rocket. Background technique [0002] The 5-meter melon petal is an important sheet metal part of the launch vehicle. The product profile is a 5-meter-level double-curvature fitting surface, with a complex structure and many quality control points such as product surface quality and mechanical properties. At present, the 5-meter-level melon petals adopt secondary drawing technology, and the drawing rate is low. This leads to low production efficiency and seriously affects the overall production progress of the model. Contents of the invention [0003] In view of this, the present invention aims to propose a molding process of a 5-meter-level melon petal of a carrier rocket, by analyzing the existing melon petal production process, researching the one-time pulling shape techn...

AI Technical Summary

Problems solved by technology

The product profile is a 5-meter-level double-curvature fitting surface, with a complex structure and many quality control points such as product surface quality and mechanical properties. At present, the 5-meter-level melon petals adopt secondary drawing technology, and the drawing rate is low. This leads to low production efficiency and seriously affects the overall production progress of the model

Images