Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Large-pipe-diameter large-thickness high-strength steel cylinder welding process

A high-strength steel, welding process technology, applied in welding equipment, welding/welding/cutting items, manufacturing tools, etc., can solve problems such as the accuracy of the cylinder body not up to standard, to ensure the flatness and verticality, ensure the accuracy of components, The effect of ensuring structural accuracy

Pending Publication Date: 2021-02-02
CSSC HUANGPU WENCHONG SHIPBUILDING COMPANY
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention aims to propose a large-diameter, large-thickness, high-strength steel cylinder welding process to solve the problem of cylinder construction due to construction sequence, welding heat input, and welding shrinkage. Technical problems with substandard precision

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Large-pipe-diameter large-thickness high-strength steel cylinder welding process
  • Large-pipe-diameter large-thickness high-strength steel cylinder welding process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: 40mm thick EH36 diameter 3.6m crane cylinder welding

[0035] (1) Remove rust, oil, cutting slag, scale, moisture, etc. within 30mm of the groove and both sides of the groove surface before welding.

[0036] (2) Tack welding and temporary spot welding The weld seam and the base metal are smoothly transitioned, the length of the tack welding is 40-60mm, and the spacing is 200-250mm. The thickness of tack welding is not less than 1 / 3 of the thickness of the cylinder.

[0037] Before welding, use a heating plate to preheat the 200mm range of the weld seam area, and the preheating temperature is greater than 100°C. Welding is performed after the preheating area meets the temperature requirements.

[0038] (3) Two welders are used to weld along the same direction, and the circumferential weld of the cylinder is divided into 18 sections according to each section of about 600mm. See figure 1 , using TWE-71Ni welding wire, welding current 180-220, voltage 27V, we...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
lengthaaaaaaaaaa
angleaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of steel cylinder welding, and discloses a large-pipe-diameter large-thickness high-strength steel cylinder welding process. The large-pipe-diameter large-thickness high-strength steel cylinder welding process comprises the following steps: cutting the edge of a barrel section to form an inclined groove; forming a barrel body through at least two barrelsections, and carrying out positioned welding along the circular seam; and arranging an even number of welders at equal intervals in the circumferential direction of a weld joint, and carrying out segmented welding in the same direction. A multi-layer welding method is adopted in the welding manner, and staggered welding is conducted on weld bead welding heads in adjacent layers at preset intervals. According to the large-pipe-diameter large-thickness high-strength steel cylinder welding process in the embodiment, segmented welding is conducted on the weld joint, an even number of welders areadopted to be arranged in the circumferential direction of the weld joint at equal intervals and conduct welding in the same direction, barrel body deformation caused by stress concentration in the welding process is avoided, the structural precision is guaranteed, the flatness and perpendicularity of a barrel body flange can be effectively guaranteed, and the component precision is guaranteed.

Description

technical field [0001] The invention relates to the technical field of steel cylinder welding, in particular to a large-diameter, large-thickness, high-strength steel cylinder welding process. Background technique [0002] In the construction process of product ships and offshore platforms, cranes are one of the important equipment on engineering ships and offshore platforms. They are responsible for lifting and transporting various equipment and materials. The accuracy requirements are correspondingly more stringent. During the construction of the cylinder, due to the construction sequence, welding heat input, welding shrinkage and other reasons, the accuracy of the cylinder is often not up to standard. Contents of the invention [0003] In view of this, the present invention aims to propose a large-diameter, large-thickness, high-strength steel cylinder welding process to solve the problem of cylinder construction due to construction sequence, welding heat input, and we...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/00B23K9/028B23K9/235B23P15/00
CPCB23K9/0052B23K9/0282B23K9/235B23P15/00B23K2101/06B23K2103/04
Inventor 邵丹丹卓振坚张继军陈立群杨婷
Owner CSSC HUANGPU WENCHONG SHIPBUILDING COMPANY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com