Stability Analysis of Planetary Rotor with Variable Speed Self Rotation and Uniform Eccentric Revolution in the Rubber Tapping Machinery

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

Dear authors,

It has been a pleasure reading your work, and I would like to provide a series of comments stemming from positive critique.

The abstract could be improved by specifying the novelties of the developed model as well as the main results obtained.

I recommend using a summary table as a glossary or abbreviation list in the first part of the Introduction.

I suggest substantially improving the "Introduction" section. It is important to cite more recent works on the modeling of systems intended for cutting materials through vibration and their associated systems. What is the challenge, barrier, or limitation that this work or development addresses? What is the novelty in relation to the existing bibliography? In my opinion, the 4GXJ-2 portable electric rubber cutter device should be described in detail in Section 2, under the Materials section.

I recommend merging Sections 2 and 3 into one section, naming it Materials and Methods. I suggest following a structure that begins with the barriers and limitations identified in Section 1 regarding the suitability of modeling and studying the behavior of this vibration cutting mechanism, indicating the challenges to be overcome or the novelty of this work (some of which you have already mentioned in the introduction). I understand that you aim to demonstrate that the modeling, experimentation, and application of this model have advantages over those already used and published in the existing literature. Then, it should be indicated how the adversities could be overcome and the strategy followed to develop the new method. Subsequently, the new model or method should be presented, and finally, the materials and equipment used and the relevant parameters, justifying the choice of the range of test values selected for the experimental part.

The document lacks a results section. I recommend transferring the results described in Section 3 to this new section, analyzing them concerning the model's predictions and against results from the literature. This section is currently very weak.

The conclusions section does not exist; I believe you have called it "summary." These are not conclusions. The conclusions should assess to what extent the objectives set at the beginning of the work have been achieved, the limitations overcome and pending, and the questions that have not been addressed and that represent future lines of work.

I hope that my recommendations, more on the document's structure than on the research itself, help you achieve the goal of publishing in the journal Forest.

Regards.

Comments on the Quality of English Language

Need improments

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

The paper "Stability analysis of planetary rotor with variable speed self-rotation and uniform eccentric revolution in the 4GXJ-2 portable electric rubber cutter" presents an interesting analysis based on a complex mathematical device, on the stability of the operation of a device used to cut rubber.

- correction of some editing errors (for example, line 38 mentions figure 1,c, which does not exist)

- in the legend of the figures that do not belong to the authors, bibliographic references should be made (it could be to figures 1, 2, or 3c)

- If Figure 5 belongs to the authors, they could explain how it was made

- a principle diagram of the test installation presented in Figure 7 could be made

- a chapter of conclusions could be introduced to complement Chapter 5 

 

Thank you

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

The paper is very valuable for multibody systems modeling. Congratulations for the nice piece of analytical and numerical work! The clearance modeling is adequately addressed and its impact on the multibody system's dynamics is thoroughly analyzed.

In the introduction, it is claimed that stability of the planetary rotor is crucial for the efficiency and quality of rubber tapping. But to which extend? What about vibration level transmitted to the hand?

Please provide a kinematic sketch of the cutter transmission. Otherwise, it is impossible to understand the principle solely on basis of kinematic description given lines 68 to 76. This is the main issue wth this paper.

Tables 1 and 2. kg and not Kg

Could you correct / comment the values of elastic modulus E and density? Materials are not defined.

Provide a drawing that defines R, radial thickness, transverse thickness for the rotating annular plate and eccentric revolving annular plate. These elements must be defined on the requested previous drawing that present the whole mechanism / power transmission.

Lines 333-334 : f is 4 N or 14 N?  as Eq(64) with average of 58 N and max of 62 N (surprising to get such a small variation)

You recommend an implicit Gill Runge Kutta integration methods (please add a reference). Why not using a IRK method for second-order differential equations lile Radau, ... ? Any comment on numerical damping of Gill RK method?  

 

You have experimental validation. But the experiments deserved a more extended description with measured values to be presented in section 4.4. Only visual evidence from tapping experiments (no idniczation how the rotation speed was measured). 

Summary is quite poor according to eht high quality of model. Please comment how this model may help to improve the design or the use of the cutter!

Typesetting: Check that a space is present before each bracket of references : tapping [4] on line 34, operation [27] on line 65, and so one. Other spaces missing: line 129, ... A space is mandatory between values and units  950 rad/s (line 351). To be checked in the whole paper.

 

Floquet without accent on e : lines 23, 281, 305,

Concerning the references:

No patents are cited throughout the document.

Looking for previously published papers, 10.16018/j.cnki.cn32-1650/n.202104005 is found and not cited. As written in Chinese, the reviewer was not able to comment furthermore. Could you clarify?

Author Response

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Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

Dear authors,

I congratulate you for the improvements to the document. I consider that they have been adequately attended to.

Good luck!

Regards

Author Response

Dear Reviewer

      Thank you for your hard work on our paper. Good luck accompanies you.

 

Fan B

14th June 2024

Reviewer 3 Report

Comments and Suggestions for Authors

I expected a kinematic diagram according to ISO 3952 standard. But I appreciate the effort and the new set of fugures, especially Fig 2c clarifies the description.

Section 3.

3.1 : In this chapter, the ??? is degraded.

I have not understood what you wanted to model with "uniformly eccentric revolution annular plate". Please clarify and justify the values of density and Elastic modulus in Tab.2 and Tab. 3. They are values for tyres in [45]! What was your objective?

Author Response

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Author Response File: Author Response.pdf