新型環狀內旋刮齒刀加工魯氏轉子之研究

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姓名

阮宇見(Nguyen Huu Gum) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

新型環狀內旋刮齒刀加工魯氏轉子之研究
(A Study on Novel Roots Rotor Manufacturing Process with Ring-shaped Internal-meshing Skiving Cutter)

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至系統瀏覽論文 (2030-12-26以後開放)

摘要(中)

目前，魯氏轉子使用特定的CNC機台製造，基於成形銑削法加工之轉子溝槽必須使用分度盤單獨銑削，導致加工時間較長。因此本研究提出一種新型CNC機台之數學模型，使用環狀?旋刮齒刀具製造魯氏轉子以提高加工精度和效率，切削刃由刀具平面及沙漏型?輪表面之相交曲線決定，藉此建立出新型機台切削數學模型。由本研究數學模型生成的轉子表面法向偏差接近於零，以證明本研究所提出數學模型之可行性，數值範例也驗證了進給量對轉子表面精度的影響。因此本研究為進一步高效魯氏轉子切削機台建立理論基礎。

摘要(英)

Currently, the form milling method is often used to manufacture Roots pump rotors in a specific CNC machine. However, it is time-consuming since rotor grooves must be milled individually using an indexing table. Therefore, this study proposes a mathematical model for manufacturing Roots rotors using a Ring-shaped internal-meshing skiving cutter based on new CNC machine schematics to enhance the machining precision and efficiency. The cutting edge of the skiving cutter tooth is determined by the intersecting curve between an hourglass-shaped internal wheel surface and a rake plane. Additionally, a general mathematical model of the skiving process has been established. The results indicate that the normal deviation of the skived rotor surface approaches zero, demonstrating the practicality of the proposed model. Furthermore, numerical experiments also verify the impact of the feed rate on the surface quality of the rotor. This study provides a theoretical basis for further developing an efficient Roots rotor cutting machine.

關鍵字(中)

★ 魯式轉子
★ 魯式鼓風機
★ 真空泵
★ ?切削
★ CNC 加工
★ 多軸 CNC 機台

關鍵字(英)

★ Roots rotor
★ Roots blower
★ vacuum pump
★ Internal skiving
★ CNC machining
★ Multiaxis CNC machine

論文目次

摘要 i
Abstract ii
Acknowledgment iii
Table of Contents iv
List of Figure vi
List of Table viii
Nomenclature ix
Chapter I. Introduction 1
1.1. Research background 1
1.2. Literature Review 4
1.3. Research Objective 6
1.4. Thesis Overview 6
Chapter II. Mathematical model for the composition of the Roots rotor profile 8
2.1. Composition of rotor profile 8
Chapter III. Mathematical modeling of the Hourglass-shaped internal wheel 17
3.1. Generation of an hourglass-shaped internal wheel surface 17
3.2. The position of the cutting edge 19
Chapter IV. Mathematical Modeling for skiving Roots rotor process on the multi-axis CNC skiving machine 22
4.1. Generation of a Ring-shaped Internal-meshing Skiving Cutter 22
4.2. Mathematical model for rotor cutting process using Ring-shaped Internal-meshing Skiving Cutter 26
Chapter V. Numerical Examples 30
5.1. Verification of the mathematical model for cutting Straight lobe Roots rotor using a Ring-shaped Internal-meshing Skiving Cutter 30
5.2. Consider the effect of feed rate on the surface quality of the skived straight lobe Roots rotor 34
5.3. Verification of the mathematical model for cutting Helical Roots rotor using a Ring-shaped Internal-meshing Skiving Cutter 40
Chapter VI. Conclusion and future works 43
6.1. Conclusion 43
6.2. Future works 43
References 44
Author Profile 47

參考文獻

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指導教授

吳育仁(Yu-Ren Wu)

審核日期

2024-12-31

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