Study on the Oscillating Phenomenon of Welding Pool with Different Penetration States in Short-Circuiting GMAW

Round 1

Reviewer 1 Report

Authors present work on oscillating phenomenon of the weld pool and studied the characteristics of oscillating phenomenon of weld pool in  short-circuiting gas metal arc welding. However, it is suggest revising the structure of the paper. Mechanism should to list in second section.

How existence of oscillation damping effect on droplet transition period explain in details

Line 152, author stated a large number of paper but I have seen that authors mainly cited to one journal. It suggest to diversify the literature.

Typo mistake in serval sentence such as line 191, 293, line 207 hard to read…

Line 222 should be Shi et al., [14] analyzed the relationship between the oscillation frequency…   

Author Response

Thank you very much for the reviewer’s suggestion to modify the structure of the article. However, this article is based on the observation of the oscillation behavior of the melt pool mechanism, so we believe that the mechanism should come after the experimental phenomenon.

The oscillation behavior of the melt pool does indeed affect the short-circuit transition period. In our welding experiments, we can observe that the short-circuit transition period usually alternates between multiple short and long periods. As for the underlying connection between them, we will conduct further research and will not elaborate on it in this article.

We have changed the wording at line 152 and made language modifications throughout the entire text.

Reviewer 2 Report

The manuscript deals with an analysis on characteristics of the oscillating phenomenon of the welding pool in short-circuiting gas metal arc welding (S-GMAW) with different penetration states, based on welding high-speed photography system. 

The Authors find that the form of the liquid bridging electric explosion impact on the weld pool is a surface impact in S-GMAW. The oscillation frequency of the weld pool diminishes with the welding-pool size increases. When confronted with the partially penetrated weld pool, boundary conditions of the fully penetrated welding pool has different boundary conditions with respect to the partially-penetrated one.

The work presented contains sufficiently original results and it is written in a very clear way. It meets the criteria of scientific quality and relevance for this journal.

I recommend the paper for publication in its present form.

Author Response

Thank you for your review.

Reviewer 3 Report

 

In general, this manuscript provides an account of the observation of the phenomenon of welding pool with different penetration states in S-GMAW. This idea has been previously mentioned in several articles, and the data obtained from the welding pool has the potential to be utilized for controlling welding parameters. However, the manuscript requires further elaboration and the objectives of this research need to be clearly defined. The authors are advised to allocate more time to refine the paper to meet the necessary publishing standards. Specific areas for improvement include:

·    The use of a more formal referencing style, in the manuscript, author used: “….Reference [8]…”: This format should be checked.

·        Clarification regarding the meaning of the reference point mentioned in lines 57-58.

·        Detailed information about the equipment and data collection methodology in lines 60-61 is required.

·        The rationale behind selecting a base metal thickness of 2mm and 4mm should be explained.

·        The manuscript should provide an introduction to the changing parameters and the specific results that will be observed before presenting the results and discussion.

·        The significance and usefulness of the results obtained should be clearly articulated.

 

 

Author Response

Thank you for your review. We believe that this expression"reference[8]" is more objective and can avoid some unnecessary misunderstandings.

The significance of reference points lies in the fact that we can use the height fluctuations of the reference point to characterize the oscillation behavior of the melt pool. This method has been applied by many scholars, and details can be found in references 4, 8, and 10.

We have provided sufficient detailed information on the equipment and data collection methods necessary to support the conclusions of this article.

The impact on the melt pool in the S-GMAW process is related to the welding parameters. To obtain melted pools with different penetration states under the same welding parameters, changing the thickness of the base material is a feasible method. Using base materials of 2mm and 4mm in thickness meets our requirements.

 We have added descriptions of the varying parameters and the specific results that were observed, as well as emphasized the significance and usefulness of the results, as demonstrated in the final section.

 

Round 2

Reviewer 3 Report

Dear authors,

I have reviewed your work and found the content to be generally clear and informative. However, I would like to suggest that you consider increasing the size of the figures in your work to make them more visible.

Thank you for your attention to this matter.

Sincerely,