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Manufacturing technology of R6-level Kenter shackle

A technology of Kent shackle and manufacturing process, applied in the field of manufacturing process of R6 grade Kent shackle, can solve problems such as chain failure

Inactive Publication Date: 2020-07-31
JIANGSU ASIAN STAR ANCHOR CHAIN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the strength and toughness of the material, alloying elements must be added, which increases the risk of hardenability and cracking
In addition, the breakage of any link in the mooring chain will lead to the failure of the whole chain, and the Kent shackle is often the weakest link, so a special manufacturing process needs to be designed to ensure that the product meets the performance requirements and is free from defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] A manufacturing process for an R6 grade Kent shackle. The shackle includes a shackle body and a horizontal pin. It is characterized in that it includes the following steps: 1) blanking: ensure that the surface of the blanked piece is smooth, and remove the edges and corners of the saw edge; 2) put the raw material The round steel is heated in a flame furnace; the heated round steel is shaped into a billet with an electro-hydraulic hammer, and the two ends are rolled through a special bow-shaped shackle ball die, and flattened and punched (the hole size is smaller than the forming size Guaranteed machining allowance), the middle part is drawn to the required size of the forging through a special buckle die, and there should be no interlayer, crack, groove and other defects that reduce product performance during forging; 3) Shackle body forming: place the blank Bending is carried out on a special bending horse frame. When bending, ensure that the hammer hits the center of ...

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Abstract

The invention discloses a manufacturing technology of R6-level Kenter shackle. A swivel comprises a shackle body and a transverse pin, and the manufacturing process is characterized by comprising thefollowing steps: (1) blanking; (2) blank manufacturing of a D-shaped shackle body; (3) forming of the D-shaped shackle body; (4) forming of a shackle transverse pin; and (5) polishing and finishing. Forge pieces with good mechanical properties and the D-shaped shackle meeting the size and shape requirements are forged. The manufacturing technology is suitable for the field of R6-level mooring chain riveting swivel machining.

Description

technical field [0001] The invention relates to the field of marine anchor chains, in particular to a manufacturing process of an R6 grade Kent shackle Background technique [0002] Kent shackle is a commonly used chain connector, which has the advantages of simple structure and convenient disassembly. When in use, the two half-rings of the Kent shackle are each connected to a chain link, and then the half-rings are put together, and the horizontal pin and the taper pin are inserted. Due to the complex shape of the Kent shackle half-rings, the half-rings and crosspieces need to be forged separately. [0003] R6 grade Kent shackles used for mooring offshore platforms have the technical characteristics of ultra-high strength and super toughness, and at the same time are required to have certain fatigue resistance. The 89mmR6 grade Kent shackle requires the tensile strength of the material to exceed 1100MPa and the breaking load to exceed 1000 tons, which requires high struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 张明曾强徐立新陶兴陶安祥陶良凤张卫新李剑
Owner JIANGSU ASIAN STAR ANCHOR CHAIN
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