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Method for predicting fusion width of underwater wet welding seam

A prediction method, a technology of wet welding, applied in the field of simulation algorithm, can solve problems such as the difficulty of predicting the weld width of the welding seam, and achieve the effects of improving the welding process, saving manpower and material resources, and good welding performance

Pending Publication Date: 2020-11-24
HOHAI UNIV CHANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the weld width of underwater wet welding is difficult to predict, the present invention proposes a method for predicting the weld width of underwater wet welding

Method used

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  • Method for predicting fusion width of underwater wet welding seam
  • Method for predicting fusion width of underwater wet welding seam
  • Method for predicting fusion width of underwater wet welding seam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 3: Carry out regression analysis on the sample data with the help of Design-Expert software, and establish an underwater wet welding response surface prediction model;

[0037] Using a second-order response surface model, the model can be expressed as:

[0038]

[0039] In the formula, β ij for x i and x j The interaction effect between; β ij for x i secondary effect.

[0040] Solved from the experimental results, the final equation expressed in terms of programmed factors is:

[0041] W=9.38+1.87x 1 +0.76x 2 -0.39x 3 +0.18x 1 x 2 +0.042x 1 x 3 +0.033x 2 x 3 -0.49x 1 2 -0.13x 2 2 +0.13x a 2

[0042] Where W represents weld width, x 1 represents the welding current, x 2 represents the welding voltage, x 3 represents water depth;

[0043] The final equation derived from the above three influencing factors of underwater welding is:

[0044] W=-5.54+0.05I+0.34U-0.03h+4.80×10 -4 IU+1.88×10 -5 Ih+2.17×10 -4 Uh+8.62×10 -5 I 2 -5.00×10 -a...

Embodiment 2

[0060] Step 3: Take the same experimental plan and experimental data, use Design-Expert software to perform regression analysis on the sample data, and call the Central Composite model;

[0061] Solved from the experimental results, the final equation expressed in terms of programmed factors is:

[0062] W=9.31+1.98x 1 +0.12x 2 -0.38x 3 +0.13x 1 x 2 +0.097x 1 x 3 +0.025x 2 x 3 -0.036x 1 2 -0.036x 2 2 +0.37x 3 2

[0063] Where W is the weld width, x 1 represents the welding current, x 2 Table welding voltage, x 3 represents water depth;

[0064] The final equation based on the above three underwater welding influence factors is:

[0065] W=-1.83036+0.041368I+0.19687U+0.026930h-3.60000×10 -4 IU-4.33333×10 - 5 Ih - 1.66667×10 -4 Uh-6.42182×10 -5 I 2 -1.44491×10 -3 u 2 -4.14627×10 -4 h 2

[0066] Where W is the weld width, I is the welding current, U is the welding voltage, and h is the water depth;

[0067] Step 4: The response surface analysis of w...

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Abstract

The invention discloses a method for predicting the fusion width of an underwater wet welding seam. The actual influence of water environment factors on the weld width is comprehensively considered inthe process of implementing welding under the underwater condition; a prediction model is constructed as follows: W =-5.54 + 0.05 I + 0.34 U-0.03 h + 4.80 * 10 <-4 > IU + 1.88 * 10 <-5 > Ih + 2.17 *10 <-4 > Uh + 8.62 * 10 <-5 > I2-5.00 * 10 <-3 > U2 + 1.42 * 10 <-4 > h2. According to the invention, a prediction model is constructed; by fully considering the influence of underwater environmentalfactors on the weld joint fusion width and combining the second-order response surface model, the obtained prediction model is accurate, the actual underwater welding process can be effectively guided, proper welding parameters are obtained according to the predicted fusion width, then the welding process is improved, manpower and material resources are saved, and better welding performance is obtained.

Description

technical field [0001] The invention belongs to the field of simulation algorithms, and in particular relates to a method for predicting the weld width of underwater wet welding. Background technique [0002] The quality of underwater welding determines the reliability of underwater engineering to a large extent. At present, underwater wet welding has obvious advantages in underwater engineering construction because of its wide application range and low cost. Therefore, research The welding process performance of underwater wet welded joints is of great significance for improving welding efficiency and weld formation. [0003] The quality of weld formation is an important factor affecting the mechanical properties of welds, and the weld width seriously affects the quality of weld formation, which is affected by the harsh underwater environment. Since the underwater wet welding process is a complex nonlinear process, it takes a lot of time and cost to determine the optimal w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20B23K31/12G06F111/10
CPCG06F30/20B23K31/12G06F2111/10
Inventor 严春妍易思张浩张可召姜心怡邱中浩
Owner HOHAI UNIV CHANGZHOU
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