Determination method for heat source model parameters in multiplewire submerged-arc welding by numerical simulation

A technology of multi-wire submerged arc welding and heat source model, which is applied in arc welding equipment, electrical digital data processing, welding equipment and other directions, and can solve problems such as difficulty in determining heat source parameters.

Inactive Publication Date: 2012-08-15
CNPC BOHAI EQUIP MFG +1
View PDF5 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to better use the finite element software to analyze the change of the heat process of multi-wire submerged arc welding, solve the problem that the he

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
  • Determination method for heat source model parameters in multiplewire submerged-arc welding by numerical simulation
  • Determination method for heat source model parameters in multiplewire submerged-arc welding by numerical simulation
  • Determination method for heat source model parameters in multiplewire submerged-arc welding by numerical simulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] Step 1: Determine the heat source model parameter U i , I i , v, n, α i , τ i , η i

[0036] Welding specification parameter table

[0037]

[0038] Determined directly by the welding specification U i , I i ,v,n,α i , τ i by formula s i / v is calculated, where S i is the distance between wire i and wire 1, considering the influence of working conditions, η i is the thermal efficiency of submerged arc welding, which is taken as 0.9 in this embodiment.

[0039] The heat flux at the position (x, y, z) at time t is:

[0040] q ( x , y , z , t ) = Σ i = 1 4 6 3 f f i ...

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

No PUM Login to view more

Abstract

The invention discloses a determination method for heat source model parameters in multiplewire submerged-arc welding by numerical simulation. The determination method comprises the following steps of: determining a heat-flow density distribution function in the multiplewire submerged-arc welding process; initially determining the heat source model parameters, wherein the heat source model parameters to be determined includes Ui, Ii, v, n, taui, etai, alphai, f<fi>, bi, ci, a<fi>, and a<bi>; and finally determining a heat-source model, wherein the determined parameters are substituted into the heat-flow density distribution function q(x, y, z, t) which is then taken as a thermology boundary condition for repeated iterative computations by a numerical simulation tool, the computation result of iterative computation of each time is compared with the shape of a joint fusion pool obtained by actual welding, the heat-source model parameters bi, ci, a<fi>, a<bi> are gradually adjusted by a range of 5% according to the comparison results until the errors between the parameters of the fusion depth and the fusion width of a simulated fusion pool and the fusion depth and the fusion width of the actual joint fusion pool are smaller than 10%, and then the determination of the heat-source model parameters in the multiplewire submerged-arc welding is finished.

Description

technical field [0001] The invention relates to a numerical simulation calculation method for the temperature field of a multi-wire submerged arc welded pipe, and proposes a method for quickly determining the parameters of the multi-wire submerged arc welding heat source model in combination with the production process, which is specifically used for the rapid calculation of the multi-wire submerged arc welding heat process Calculation can also evaluate the welding process through numerical simulation results, which plays an important role in engineering applications. Background technique [0002] Multi-wire submerged arc welding technology is a key technology in the production of longitudinal welded pipes. The optimization and control of welding process parameters is not only a key factor affecting the performance of welded joints, but also an important factor affecting the manufacturing cost of welded pipes and improving production efficiency. In recent years, with the The...

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
IPC IPC(8): G06F17/50B23K9/095
Inventor 王旭赵波张红杨玮玮韩秀林刘涛刘广川胡海朝杨新岐孙灵丽
Owner CNPC BOHAI EQUIP MFG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap