Synchronization of Auxiliary Mechanisms and Main Electric Drive of the Pipe Cold-Rolling Mill. Complete Solution

Round 1

Reviewer 1 Report

The manuscript describes a synthesis of auxiliary mechanisms electric drives of pipe cold-rolling mills. The authors paid their attention to the statement of problem and noted that there are still some fundamental concerns with the experimental design and with the analysis. They took account for different features of cold-rolling mill operating principle and met the specific requirements. The work also shows detailed analysis of the problem and justified approaches and methods.
The article covers four main sections: statement of the problem with detailed description of the mechanism features, providing of minimum vibration, electromechanical converter enhancement, power circuits synthesis. Obviously, the problem is considered comprehensively. Also, the article highlights important data that might have been overlooked when promulgating the results of implementation (table 1, page 6).
The main strengths of this paper are that it addresses an interesting and actual question, finds an innovation based on a carefully selected approaches and methods, suggests the collaboration of industry and science (page 9), provides a clear answer. The manuscript is well-written and nicely presented, with a good balance of descriptive text and discourse and practical illustration of package usage.
Some of the weaknesses are the not always easy to work with 3-dimensional dependencies to quantify the results and not specified data source with the prices (figure 7, page 7).
Other than that there were the following minor observations:
1. Page 3, Figure 2: correct the title, “and the amplitude of the resonant maximum of the frequency response” probably should be removed.
2. Page 7: shown equations could not be read.
3. Page 9, Figure 9: the title of vertical axis should be T (electromagnetic torque as descripted in the text).

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

An interesting work that assesses the utilization of an independent electrical motor for the auxiliary systems in a cold rolling pilger mill. The paper is well organized and the scope is clearly defined. The paper can be considered for a potential publication, however, appropriate revisions are needed before publication:

• The first half of the abstract is more suited to the introduction. The abstract has to be rewritten in order to reflect what was the aim, the approach and the aftermath of the study.
• In Figure 3 the numbers in the legend are not visible. Please use a higher quality image.
• In section 3, it is not clear to me why the static analysis has been made. You had an old motor that you wanted to use and you conducted the analysis to confirm whether it is strong enough? In the opposite case that you designed the rotor, why do you present some intermediate draft and not just the final?
• For the static calculation, the only criterion is the stress? Isn’t there any geometrical criterion, e.g. some clearance, that has to be respected? Moreover, to me it seems that in Figure 4 the elements touch each other and for this reason, under dynamic load, the part will fail.
• Please, say a few words about the material model and the parameters used.
• How did you optimize the shape? Trial and error? Which is the maximum value of elastic deformation?
• In page 5, “The results show that, in the modified … “, presenting the modified configuration will make the manuscript more complete.
• Please provide some more information regarding the methodology for the calculation that resulted in Figure 6. Perhaps another figure or some equation. 
• In section 4, in the first paragraph and in Figure 7 if necessary please provide some references to support all your claims.
• The equations in page 7 have editing problems and cannot be read.
• In section 4, please provide further information regarding the values of all the constants and variables used and how these values were determined.
• Figure 2 editing problem in the caption
• End of manuscript, in CC BY editing problem

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

The present paper deals about the realization of a multicomponent system including an experimental investigation, in order to assess the potentiality of such structure.

It is an interesting approach.

For me it is unclear the connection with the principle for optimizing the power circuit diagram, and the dependency of the unit cost of the electrical system, probably also for the reason that such representation reporting the polynomial equations are not visible.

I do not found in the manuscript a feasibility of the system.

Author Response

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Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

The authors have taken into account all the comments and introduced appropriate changes in the text. The paper according to my humble opinion can be published as is.

Reviewer 3 Report

The Authors have provided the necessary modificationcorrections to the manuscript. In the present for can be accepted for publication.