Mould for pressing corrugated bulkhead with three-roller bending machine

Abstract

The invention relates to a mould for pressing a corrugated bulkhead with a three-roller bending machine in the ship constructing process, comprising an upper mould (2) and a lower mould (3). The uppermould (2) and the lower mould (3) have an equal effective working length to an upper roller (1) and a lower roller (4); the upper mould (2) comprises an upper mould pressure head (2.2) and an upper mould base (2.1); the lower mould (3) comprises a lower mould grove (3.1) and a lower mould base (3.2); the upper mould (2) is connected on a single upper roller (1) of the three-roller bending machine, and the lower mould (3) is connected between two lower rollers (4) of the three-roller bending machine; the upper mould pressure head is detachably connected with the upper mould base; the lower mould groove (3.1) is designed to be adjustable; the mould is designed to a mode formed by connecting a plurality of coupled segments; the upper mould (2) and the lower mould (3) are detachably connectedwith the upper roller (1) and the lower roller (4) of the three-roller bending machine. In the method of the invention, the processing length of the trough members can be lengthened just by one three-roller bending machine matching with a special mould, thereby reducing the amount of members, decreasing the processing and splicing working amount, improving the production efficiency and the processing precision and lowering the ship constructing cost.

Description

(1) Technical field [0001] The invention relates to a method and a mold for pressing a grooved bulkhead with a three-roll plate rolling machine in the hull building process. It belongs to the technical field of shipbuilding. (2) Background technology [0002] In the process of hull construction, due to the design and ship type requirements of some ships (such as bulk carriers and oil tankers), the subdivided transverse walls of cargo holds are generally designed as grooves. General shipyards now use hydraulic presses to press the grooved bulkheads in pieces, and then splicing them into a whole. That is: according to the span between the pressure head and the body of the hydraulic press, and taking into account the maximum pressing length of the controllable pressing precision, divide the grooved bulkhead into small pieces (generally the maximum is 1500mm×3000mm), and then use the mold to press into a single piece. After passing the inspection, the trough parts are finally ...

AI Technical Summary

Problems solved by technology

[0003] 1. The size of the general trough bulkhead is about 20000mm×20000mm. Due to the limitation of the processing capacity of the hydraulic machine, it must be divided into many small pieces. The workload of pressing and splicing is very large. At the same time, a large number of splicing welds affect the appearance, and the production cost is high. Low production efficiency

[0004] 2. In fact, single-groove parts have machining errors allowed by the precision, but in the splicing process of many parts, errors will accumulate and cause the final error to exceed the standard or the notch butt joint is not smooth

Generally, this problem can only be eliminated by adding a butt trimming allowance for single-groove parts, resulting in material waste

[0005] 3. The size and accuracy of splicing are generally controlled by splicing tire frames in use for single-groove components, resulting in sluggish site and low utilization rate

[0006] Due to the above reasons, the production cycle of the corrugated bulkhead is long, the quality control is difficult, and the economy is not good.

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