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Production process of welded anchor chain

A production process and anchor chain technology, which is applied to ships and other directions, can solve the problems of low efficiency of flash welding, non-conformity of welding section size, large deformation of anchor chain rings, etc., to reduce upsetting distance, control end face misalignment, and reduce stress concentrated effect

Active Publication Date: 2017-07-04
QINGDAO ANCHOR CHAIN
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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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  • Production process of welded anchor chain
  • Production process of welded anchor chain
  • Production process of welded anchor chain

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] The steps of the process are as follows:

[0025] Step one, prepare materials. 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. Requirements, the anchor chain chooses the killed steel that meets the performance required by the third-grade anchor chain as the round steel material, which contains the following components in terms of mass percentage: C: 0.28-0.32%, Si: 0.68-2.46%, Mn: 0.8-1.1% , Cr: 0.42-0.75%, V: 0.06-0.14%, Ti: 0.01-0.03%, S: ≤0.02%, P: ≤0.02%, the rest is Fe; mechanical properties and material properties are: yield strength ≥ 620MPa, Tensile strength ≥ 780MPa, elongation ≥ 17%, reduction of area ≥ 40%, and the diame...

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Abstract

The invention relates to a production process for a welded chain cable. The production process includes the procedures of material preparation, heating, ring bending, flash butt welding, deburring, pressing and inspection, wherein in the ring bending procedure, round steel is bent to form a small opening with the opposite end faces in a V shape; in the flash butt welding procedure, extrusion force in different directions is exerted on a bent ring to achieve welding of the bent ring, and according to process parameters of the flash butt welding, the flash speed is 1.4-1.8 mm / s, the flash time is 5-8 s, the maximum current value is 80 kA, the upsetting speed is 90-120 mm / s, and the upsetting pressure is 30-50 kN. Through modification of the bent ring structure, the opening with the end faces being at a certain angle is formed, extrusion is exerted on the lateral ends of the bent ring and the two ends of the opening of the bent ring, stress concentration of the lateral ends of the bent ring and deformation of the ends of the opening are reduced, and welding is achieved through one-time flash; end face dislocation is effectively controlled, the upsetting distance is reduced, and in addition, the flash welding efficiency and the welding quality are further improved through the proper welding process parameters.

Description

technical field [0001] The invention relates to the processing of anchor chains used in ships and marine engineering, in particular to a production process of welded anchor chains, 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 can be divided into cast anchor chains, forged anchor chains and welded anchor chains according to their production methods. The flash welding method with a high degree of automation has become the mainstream form of modern high-strength welded anchor chain production. The production steps of the flash welding process mainly include blanking, heating, ring bending, welding, deburring and pressing. [0003] And in the flash wel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00C22C38/02C22C38/04C22C38/18C22C38/12C22C38/14
CPCB23P15/00B63B21/20C22C38/02C22C38/04C22C38/12C22C38/14C22C38/18
Inventor 孙传庆张志柏
Owner QINGDAO ANCHOR CHAIN
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