Crosspiece structure of R6-level shift mooring chain and shift pressing process

Abstract

The invention relates to a crosspiece structure of an R6-level mooring chain, which comprises a crosspiece head, a waist body and a crosspiece tail; the crosspiece structure of the R6-level mooring chain is characterized in that the crosspiece head and the crosspiece tail are arranged in a pyramid shape, the end surface of the crosspiece is provided with an arc-shaped pit, and a fillet Rd is arranged at the position where the arc-shaped pit intersects with two adjacent side surfaces; the waist body is a cuboid, the length of the waist body is b1, and the width of the waist body is t1; a smoothtransition is arranged between the crosspiece head and the waist body and between the waist body and the crosspiece tail. According to the crosspiece structure of the R6-level mooring chain, the crosspiece fillet is enlarged, so that the indentation depth is more uniform, the contact area is increased, the stress concentration at the indentation position is reduced, and the service life is prolonged; the length b1 of the waist body is reduced, so that the transverse sectional area of the crosspiece is reduced, the self weight is reduced, and the overall weight is effectively reduced; according to a shift pressing process, the temperature range of the R6 mooring chain shift pressing is 550-700 DEG C, so that the stress concentration cannot be caused by overlarge indentation depth, and thecrosspiece cannot fall off in the using process due to over shallow indentation.

Description

technical field [0001] The invention relates to the field of mooring chains, in particular to a crosspiece structure and pressing process of an R6 grade mooring chain with gears. Background technique [0002] The mooring chain is a kind of equipment that fixes the marine floating structure in its operating position. It is a key component of offshore mooring positioning and an indispensable safety guarantee equipment for the mooring of mining and processing devices. According to the mechanical properties, it can be divided into R3, R3S, R4, R4S, R5, R5S, R6 and other grades. In recent years, with the development of the offshore engineering industry, customers have higher and higher requirements for the performance and reliability of mooring chains. The tensile strength of R6 mooring chains is above 1100MPa. The service environment involves different sea areas horizontally and vertically covers atmospheric areas, splash areas, tidal range areas, full immersion areas and sea m...

AI Technical Summary

Problems solved by technology

Compared with R5, the strength and hardness of R6 mooring chains have been improved to a certain extent. The indentation depth of R6 level crosspieces in the prior art is shallow after being pressed into the link, and the stress concentration will affect the service life of the mooring chains. Mooring chain transoms need to be modified due to the high weight of the transoms

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