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Forging method for R6-grade mooring chain riveting swivel

A mooring chain and riveting technology, applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve problems such as cracking, achieve the effect of prolonging the annealing time, ensuring plasticity, and eliminating the risk of fracture

Inactive Publication Date: 2020-04-17
JIANGSU ASIAN STAR ANCHOR CHAIN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary swivels can be fixed by welding after the assembly is completed, but since the R6 grade swivel exceeds 1100MPa, welding is prone to the risk of cracking, so it cannot be fixed by welding

Method used

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  • Forging method for R6-grade mooring chain riveting swivel
  • Forging method for R6-grade mooring chain riveting swivel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] A forging method for a riveted swivel, the swivel includes a swivel body and a swivel ring bolt, 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) riveting the swivel Ring body billet: put the raw material round steel into the flame furnace to heat; use the air hammer to upset and stretch the heated round steel to make a blank of close size, then gas cut the inner hole (the size of the hole is smaller than the forming size), forging There should be no interlayers, cracks, grooves and other defects that reduce product performance; 3) Forming of riveted swivel body: check the forming mold before forming, the forming cavity should have a smooth surface, and there should be no cracks, grooves and lowering Other defects in product performance; then the bent blank is heated to 1200~1260°C and formed by forging with a forming die, and the final forging ...

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PUM

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Abstract

The invention relates to a forging method for a R6-grade mooring chain riveting swivel. The swivel comprises a swivel body and a swivel bolt. The method comprises the following steps: 1) performing feeding; 2) forming a blank of the riveting swivel body; 3) molding the riveting swivel body; (4) forming a blank of the riveting swivel bolt; 5) molding the riveting swivel bolt; 6) performing edge trimming and polishing. The forged swivel product has good mechanical properties and meets size and shape requirements. The forging method is applicable to the processing field of the R6-grade mooring chain riveting swivel.

Description

technical field [0001] The invention relates to the supporting field of ships and marine engineering, in particular to a forging method for riveting swivels of R6 mooring chains. Background technique [0002] The mooring chain riveted swivel used for mooring of offshore platforms has the technical characteristics of super high strength and super toughness. During use, two ends of the riveted swivel are respectively connected with a chain link. Due to the complex shape of the riveted swivel, the body and the ring bolt need to be forged separately, and finally assembled into the final product. Ordinary swivels can be fixed by welding after the assembly is completed. However, since the R6 grade swivel exceeds 1100MPa, welding is prone to the risk of cracking, so it cannot be fixed by welding. At the same time, due to the special high-temperature mechanical properties of R6 grade materials, special heating methods are required. Contents of the invention [0003] The purpose...

Claims

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Application Information

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IPC IPC(8): B21J5/00B21J1/06C21D8/00C21D9/40
CPCB21J1/06B21J5/002C21D8/005C21D9/40
Inventor 李剑曾强徐立新陶兴陶安祥陶良凤张卫新董鑫
Owner JIANGSU ASIAN STAR ANCHOR CHAIN
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