A Review of the Factors Influencing Surface Roughness in Machining and Their Impact on Sustainability

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

The article provides a review of the influencing factors on surface roughness during machining, seemingly aiming to include all influencing factors, but only listing some conventional machining elements. Nowadays, readers may pay more attention to some advanced machining methods, such as high-speed or ultra high-speed machining, ultrasonic assisted machining, etc., that may affect the generation of surface roughness. In addition, the changes in surface roughness during the machining of new materials such as composite materials and honeycomb materials etc. will also be more attractive to readers. Moreover, the article lacks in-depth analysis of the current research status and does not propose future research trends.

Furthermore, how is surface roughness and sustainability linked? The article only provides three machining cases. How to balance the relationship between surface roughness and sustainability? Unfortunately, the articles on these issues have not provided any reference value.

The author has conducted a large amount of literature search work, but the review article is not a simple organization of literature, and requires in-depth analysis of research status, research shortcomings, and future development trends.

Comments on the Quality of English Language

Minor editing of English language required

Author Response

Thank you for your comments.

Please, find attach our responses. Best regards

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

1. Tool diamter, heical angle,  teeth number, they are all the important factors affecting the surface roughneess, please add them to the "Factors that influence surface roughness generation". 

2. Ra Rz Rq Sa Sz Sq, they are the indicator to evaluate the surface roughness.

3. Change the degree to °

4. It is suggest to describe more information about the Back cutting effect and slight tilt of spindle to minimize it.

5.  Supplement the text about the reason for the generatition og BUE, and how BUE affect the machined surface.

6. Add the references for all equations

7. Supplyment the limitaion of this work.

Author Response

Thank you for your comments.

Please, find attach our responses. Best regards

Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

This work presents a comprehensive analysis of factors influencing machining-induced surface roughness, reviewing the researches in this field and performing three case studies. Several comments are given below:

(1) In section 3, while reviewing the machining-induced surface roughness, an important indicator is missing in this paper, i.e. the workpiece material. There is no doubt that the effect of factors on surface roughness will be different when machining difference materials. Although the workpiece material is discussed individually in section 3.1.3, I still suggest the authors add workpiece materials as much as possible while reviewing references.

(2) In Figure 5, please point out rake face and flank face. Since this paper mainly focuses on turning and milling, edge geometry of a milling tool should also be described here.

(3) In Figure 7, the color and number of inserts should be the same between left and right pictures to avoid misunderstanding. It is better to label the tool holder, inserts, workpiece, feed mark, etc.

(4) In section 3.3, what is the difference between chatter and vibration? Is it necessary to discuss them separately?

(5) As a review paper, outlook part is missing in the conclusion section. The authors should offer several suggestions to guide the research trend in this area based on the current knowledge, or point out the challenges.

(6) Review paper should focus more on the state-of-the-art, however, the references in this paper are relatively old. I suggest the authors add more articles within the past 5 years to emphasize the importance of such a review.

Comments on the Quality of English Language

The english language is fine and readable.

Author Response

Thank you for your comments.

Please, find attach our responses. Best regards

Author Response File: Author Response.pdf

Reviewer 4 Report

Comments and Suggestions for Authors

 The following is the list of detailed comments with respect to the manuscript:

1. The order of the factors mentioned in line 110 of the manuscript is inconsistent with the factors mentioned in line 85. The full text should be as consistent as possible.

2.  Please check the expression of ordinate in Figure 4.

3. The expression form of “pitch” is unified.

4. It is suggested that the relationship between tool wear rate and cutting tool should be added in lines 160-162. Please check whether it is appropriate to directly link the  “relief angle” to the surface roughness.

Author Response

Thank you for your comments.

Please, find attach our responses. Best regards

Author Response File: Author Response.pdf

Reviewer 5 Report

Comments and Suggestions for Authors

Surface roughness is one of the most important characteristics of product quality. This manuscript presents a comprehensive review of factors that affect surface roughness generation in machining (turning/milling) processes. The influence of each factor on roughness is also discussed in depth. The authors describe practicability of sustainability in terms of reducing in kg CO2 equivalent through insert geometry selection, cooling system or cutting parameter optimization. The manuscript is also well organized. This manuscript can provide a lot of useful guidance for practitioners of milling and turning finishing operations.

Comments on the Quality of English Language

The quality of English language needs to be improved a bit.

Author Response

Thank you for your comments. He have tried to improve the English language of the manuscript.

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

The author has made detailed modifications and is ready for publication.

Reviewer 3 Report

Comments and Suggestions for Authors

The authors have significantly improved their work with respect to my comments. I suggest accept.