One-time pressure-molding technique for marine water-jet propulsion passage aluminum double curved plate

Abstract

The invention discloses a technical method for compressing hyperbolic aluminium panels of a ship water jet flow passage to be shaped by one time. The method comprises the steps: performing linear smoothing, modeling and lay-out on the structure of a ship flow passage and manufacturing an inspection sample box and a test compression module; performing a compression test by taking an aluminium platewhich is the same as a work piece plate to obtain an accurate rebound value; amending a testing compression module and manufacturing a special compression module; cutting the work piece, and drawingprocessing position lines on the surface of a blank; performing compression test on the special compression module to inspect the deviation values of the processing position lines of the workpiece, re-compressing to shape the workpiece after inspection and amendment and then putting the workpiece on the inspection type box to inspect the shaping accuracy; and if any error, compressing and amendingagain until the workpiece meets the requirements. The invention can ensure the shaping quality of workpieces, simplify the operation, improve the processing speed, and particularly can save cost, increase benefit in mass production and bring remarkable economic effect.

Description

technical field [0001] The invention belongs to the field of ship hull construction technology, and more specifically relates to a process method for one-time pressing and forming of an aluminum hyperbolic panel in a water jet propulsion channel structural part of a ship. Background technique [0002] There are many non-straight plate members in the hull structure, and the bending workload is relatively large. The main forming methods are mechanical cold bending method and water and fire bending method. Generally, unidirectional curvature plates are processed by mechanical cold bending. For components with small two-way curvature, cold bending can also be performed on a three-roll plate bender. For plates with two-way curvature or multi-directional curvature, the curvature in one direction (the direction with the largest curvature) is first bent by a cold bending machine, and then the curvature in other directions is bent by the water-fire bending method; if the batch If i...

AI Technical Summary

Problems solved by technology

Brother Shipyard, which built the same type of ship, used cast steel molds to carry out the processing and forming tests of the hyperbolic panels several times, but all failed. The main reasons are: the dredging and forming curvature changes greatly, and the reverse deformation process of castings is complex and difficult to control , resulting in a large error in molding accuracy; the mold correction process is complicated, the construction is difficult, and the cost is high

At present, there is no successful precedent in China to use molds to press marine aluminum hyperbolic panels

Images