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A Forging Method of R5 Mooring Chain Attachment Rotary Shackle

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

Active Publication Date: 2016-12-14
JIANGSU ASIAN STAR ANCHOR CHAIN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A Forging Method of R5 Mooring Chain Attachment Rotary Shackle
  • A Forging Method of R5 Mooring Chain Attachment Rotary Shackle
  • A Forging Method of R5 Mooring Chain Attachment Rotary 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 or over-burning surface quality defects; When thick, there should be no interlayer and crack defects; use a 3-ton belt hammer to forge both ends of the cuboid forging into steps, and there should be no interlayer, crack, groove and other defects that reduce product performance during forging; put the forging into the forming die , with a 3-ton belt hammer, forging and forming, there must be no interlayers, cracks, grooves and other defects that reduce product performance during forging; tempering, put the forgings in the tempering furnac...

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Abstract

A forging method for the rotary shackle of an R5 grade mooring chain accessory. The raw materials are blanked according to the design requirements of the drawings; the non-destructive testing of the materials is carried out with a flaw detector; heating is carried out in a box-type reverberatory furnace; the forging temperature is controlled at 900‑1100 ℃; use a 3-ton belt hammer to punch the forging into a cuboid, forge both ends into steps, put the forming die in the forging, and forge and shape; tempering, put the forging in the tempering furnace, and control the tempering temperature at 620 ‑650°C; use a flaw detector to conduct non-destructive testing on forgings. The present invention appropriately increases the initial forging temperature and the final forging temperature of the rotary shackle of the R5 mooring chain attachment. In addition, because the R5 rotary shackle will produce surface cracks during forging, the forging temperature is also appropriately increased at the same time, and the forging machine is increased. The processing allowance has reached the relevant requirements of the classification society for the surface and internal structure of the R5 mooring chain accessories, ensuring product quality.

Description

technical field [0001] The invention relates to a forging method for a rotary shackle of an R5 grade mooring chain accessory. Background technique [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 w...

Claims

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Application Information

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Patent Type & Authority Patents(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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