Fabricating method for turning large rudder pintle of fuel ship in 300, 000 tons

A processing method and rudder stock technology, which is applied in the field of processing 300,000-ton oil tanker large rudder stock, and achieves significant technical effects, low processing cost and simple structure

Inactive Publication Date: 2006-12-06
SHANGHAI HEAVY MACHINERY PLANT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the technical parameter requirements of the large rudder stock of a 300,000-ton super oil tanker, it is difficult to find a heavy-duty horizontal lathe that can process this kind of rudder stock in China, and even if there is a processing fee, it must be very high

Method used

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  • Fabricating method for turning large rudder pintle of fuel ship in 300, 000 tons
  • Fabricating method for turning large rudder pintle of fuel ship in 300, 000 tons
  • Fabricating method for turning large rudder pintle of fuel ship in 300, 000 tons

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Embodiment Construction

[0023] Such as figure 1 As shown, the large rudder stock used by the 300,000-ton tanker is a special type of part, and the existing heavy-duty horizontal lathes do not have this processing capability.

[0024] The present invention adopts a bull head lathe used for processing the rotary cylinder to turn the rod portion of the rudder stock. The faceplate of the bull head lathe has a diameter of ￠4.2m and a maximum load of 80 tons, which can be adapted to a processing range of ￠5.88×12m after enlargement and transformation.

[0025] The specific method is as follows:

[0026] Firstly, the rudder stock is roughly machined on the floor boring machine, and the rudder stock is milled into a polygonal shape with a universal square milling head to ensure the machining allowance of the bar. After rough machining, the weight of the rudder stock is 50-60 tons; This is to reduce the weight of the rudder stock when it is clamped on the bullhead lathe as much as possible, and leave a marg...

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Abstract

A turning method for manufacturing the large rudder lever of 300000-ton-class oil tanker includes such steps as rough machining it on a ground borer, installing the tail of rudder lever to the bottom plate of fixing mechanism, installing the balance weight to another side of said bottom plate, fixing the rudder lever to bull-nose lathe via said bottom plate, using two adjustable supporting rings to support the middle of rudder lever, using hydraulic supporting rollers to support the disk chuck of bull-nose lathe, and turning.

Description

technical field [0001] The invention relates to a machining process method, in particular to a process method for processing a large rudder stock of a 300,000-ton oil tanker. Background technique [0002] The large rudder stock is one of the main accessories of the 300,000-ton supertanker. figure 1 It is a schematic diagram of the structure of the rudder stock. Its forging has a gross weight of more than 100 tons and a length of 12 meters. It has an irregular shape, like an enlarged rifle. [0003] Because of the specific irregular shape, and its own weight is very heavy, the turning diameter is large, and machining is very difficult. [0004] First of all, the most critical and demanding part of the rudder stock processing is the outer circle turning of the rudder stock. The tolerance and surface roughness requirements are very high; secondly, a section of M570x6 external thread with a length of 350mm is processed on the top of the rudder stock. [0005] In addition, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P13/00
Inventor 李友发程志家
Owner SHANGHAI HEAVY MACHINERY PLANT
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