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Forging method of Grade R5 mooring chain accessory swivel shackle

A mooring chain and accessory technology, which is applied to engine components, mechanical equipment, etc., can solve the problems of large volume, difficult forming, and difficult forging of rotary shackles.

Active Publication Date: 2012-09-26
JIANGSU ASIAN STAR ANCHOR CHAIN +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high strength and hardness of the R5 grade mooring chain, and the size of the rotary shackle compared with the chain and other accessories, it is difficult to forge and form.

Method used

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  • Forging method of Grade R5 mooring chain accessory swivel shackle
  • Forging method of Grade R5 mooring chain accessory swivel shackle
  • Forging method of Grade R5 mooring chain accessory swivel shackle

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Embodiment Construction

[0011] A method for forging a rotary shackle for an R5 grade mooring chain accessory, characterized in that blanking is performed on raw materials according to the diameter and length dimensions specified in the design drawings, and the blanking length tolerance is ±1mm; The non-destructive testing of the material is carried out by the instrument; the heating is carried out in the box-type reverberatory furnace, and there must be no overheating and over-burning surface quality defects; When thick, there should be no defects such as interlayers and cracks; use a 3-ton belt hammer to forge both ends of the cuboid forging into steps, and there should be no interlayers, cracks, grooves, and other defects that reduce product performance during forging; Put it into the forming mold, use a 3-ton belt hammer, forge and form, there should be no interlayers, cracks, grooves and other defects that reduce product performance during forging; tempering, put the forgings in the tempering furn...

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Abstract

Disclosed is a forging method of a Grade R5 mooring chain accessory swivel shackle, comprising the steps of: blanking raw materials according to design requirements of drawings; carrying out nondestructive testing on the materials with a flaw detector; heating the materials in a box-type reverberatory furnace; controlling the forging temperature between 900 and 1100 DEG C; using a 3-ton belt drop hammer to beat a forge piece into a cuboid and its both ends into a step, putting a molding die into the forge piece, and forging into a shape; placing the forge piece into a tempering furnace and tempering at a controlled temperature of 620-650 DEG C; and carrying out nondestructive testing on the forge piece with the flaw detector. The forging method provided by the invention appropriately raises initial forging temperature and final forging temperature of the Grade R5 mooring chain accessory swivel shackle, appropriately raises forging temperature as surface crack will emerge when Grade R5 swivel shackle is being forged, and increases working allowance of forging machines. Furthermore, relevant requirements of classification societies for surface and internal structures of the Grade R5 mooring chain accessory are reached, and product quality is ensured.

Description

Technical field: [0001] The invention relates to a forging method for a rotary shackle of an R5 grade mooring chain accessory. technical background: [0002] The R5 grade mooring chain accessory rotary shackle used on the deep sea drilling platform has the same technical characteristics as the R5 mooring chain with high strength, toughness, corrosion resistance and fatigue resistance. According to forging requirements, its surface and internal structure should meet the relevant requirements of ABS, DNV and other classification societies. Considering its importance to the safety of marine operations, a specific forging method must be adopted to make the produced rotary shackle have good comprehensive performance. [0003] According to the design requirements of classification societies and deep-sea drilling platforms, R5 grade mooring chain accessories should have a long service life. During long-term use, the mooring chain rotary shackle is subjected to long-term Corrosion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/74
Inventor 陶安祥陶良凤张卫新张明李剑朱桥良粟京别顺武杨宏滨李亚湖李焱红
Owner JIANGSU ASIAN STAR ANCHOR CHAIN
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