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Welding production technology for R4-level anchor chain

A production process and anchor chain technology, applied in welding equipment, welding/welding/cutting items, manufacturing tools, etc., can solve the problems of large deformation of anchor chain rings, non-conformity of welding section size, and low efficiency of flash welding, etc., to achieve Effects of reducing stress concentration, reducing upsetting distance, and accelerating melting

Active Publication Date: 2016-04-06
YANCHENG HAITE MACHINERY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When performing flash welding in this way, due to the long top distance, large dislocation and strong stress at the end will occur, and it is also easy to cause large deformation of the entire anchor chain ring, and the welding section size does not meet the requirements. Welding efficiency is low

Method used

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  • Welding production technology for R4-level anchor chain
  • Welding production technology for R4-level anchor chain
  • Welding production technology for R4-level anchor chain

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] The steps of the process are as follows:

[0026] Step one, unloading. For marine engineering equipment, a greater mooring effect is required, and there are high requirements for the strength and toughness of the anchor chain; while the ocean is a corrosive environment, the anchor chain also needs to have better corrosion resistance. It is required that high-strength steel with the required properties of R4 anchor chains be selected as the round steel material for the anchor chain, and the round steel contains the following components in terms of mass percentage: C: 0.16-0.18%, Si: 0.42-0.50%, Mn: 0.8- 1.0%, Cr: 0.42-0.70%, Mo: 0.20-0.36%, Al: 0.03-0.04%, S: ≤0.02%, P: ≤0.02%, the balance is Fe; yield strength ≥ 680MPa, tensile strength ≥ 860MPa, elongation ≥ 14%, reduction of area ≥ 50%, and the diameter of the formed round steel is 100mm-126m...

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Abstract

The invention relates to a welding production technology for an R4-level anchor chain. The welding production technology includes the processes of material preparing, heating, ring bending, flash butt welding, deburring, gear pressing and inspecting. In the ring bending process, round steel is bent into a small opening with the end faces relatively forming a V shape. In the flash butt welding step, roughing processing is conducted on the end faces, to be welded, of a bent ring before welding, during welding, extrusion force in different directions is applied to the bent ring, and welding of the bent ring is achieved. According to technology parameters of flash welding, the flash speed is 1.2-1.6 mm / s, the flash time is 5-8 s, the maximum value of maximum current is 90 kA, the upsetting speed is 100-120 mm / s, and the upsetting force is 40-55 kN.

Description

technical field [0001] The invention relates to the processing of anchor chains used in ships and marine engineering, in particular to an R4 anchor chain welding production process, which belongs to the field of anchor chain manufacturing. Background technique [0002] The anchor chain is the chain connecting the anchor and the hull or marine engineering equipment. With the development of marine resources and the continuous development of marine engineering equipment, the demand for anchor chains in marine engineering is also increasing. Anchor chains with higher specifications and strength levels are also being continuously developed and applied. The cross-sectional diameter of the welding joint of large-scale high-strength anchor chains is greater than 100mm, and the tensile strength of R4-level anchor chains is required to be greater than 860Mpa. The requirements for production quality are also getting higher and higher. Anchor chains can be divided into cast anchor chai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B23K11/04B23K11/34B23K103/04
CPCB23K11/04B23K11/34B23K2103/04B23P15/00B63B21/20
Inventor 顾伟
Owner YANCHENG HAITE MACHINERY TECH CO LTD
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