高速連桿沖床機構動態特性研究｜國立清華大學博碩士論文庫

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研究生：	張昇崑 Shen-Kun Chang
論文名稱：	高速連桿沖床機構動態特性研究 A Study of the Dynamic Characteristics of High Speed Press Machine Mechanism
指導教授：	左培倫 Pei-Lum Tso
口試委員:
學位類別：	碩士 Master
系所名稱：	工學院 - 動力機械工程學系 Department of Power Mechanical Engineering
論文出版年：	2004
畢業學年度：	92
語文別：	英文
論文頁數：	47
中文關鍵詞：	沖床、機構動力學、坤氏定理、高速沖壓
外文關鍵詞：	press machine, mechanism dynamics, Quinn’s theorem, high speed pressing
相關次數：	點閱：2 下載：0
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Four-bar crank slider mechanism is broadly used in the design of mechanical presses. General assumptions such as crank having a constant input angular velocity or neglecting the effect of workpiece are often made for simplicity in the analysis and synthesis.

By applying Quinn's theorem and introducing general press machine considerations, such as the effect of workpiece and constant energy input, this paper proposes a concise model of determining the dynamic characteristics of four-bar crank slider mechanism which is used in mechanical pressing.

The following items are accomplished in this paper: the variation of crank angular velocity with respect to the conventional assumption, the effect of different types energy input ( ) and the comparison between the defined dynamic pressing force and corresponding static pressing force. Also, the designing of flywheels is conducted with different modes.

ABSTRACT…………………………...………..............………Ⅰ
CONTENTS.................................................................................Ⅱ
LIST OF FIGUES... ....................................................................Ⅳ
LIST OF TABLES.......................................................................Ⅵ

CHAPTER 1  Introduction....................................................................1
1.1 Metal forming and press machine........................................................1
1.2 Mechanical press..................................................................................4
1.3 Motive of study.....................................................................................6
1.4 Objective of study.................................................................................8
1.5 Previous work.......................................................................................8

CHAPTER 2  Theory and Modeling...................................................11
2.1 Quinn’s theorem.................................................................................11
2.2 Advantages of applying Quinn’s theorem..........................................16
2.3 Assumptions for Modeling.................................................................18
2.4 Procedure of Modeling.......................................................................20

CHAPTER 3  Numerical Examples....................................................23
3.1 Establishing εcurves........................................................................23
3.2 Effect of Different  ......................................................................26
3.3 Consideration of potential energy.......................................................30
3.4 Designing of flywheel........................................................................33
3.5 Dynamic pressing force......................................................................36
3.6 Comparison of dynamic and static pressing force..............................39


CHAPTER 4  Conclusions and Future Work....................................43
4.1 Conclusions........................................................................................43
4.2 Future Work........................................................................................44

REFERENCES.......................................................................................45

                                

[1] B. E. Quinn, “Energy Method for Determining Dynamic Characteristics of Mechanisms”, ASME Journal of Applied Mechanics. Vol. 16. No. 3. September 1949

[2] Hamilton H. Mabie, Fred W. Ocvirk, “Mechanisms and dynamics of machinery”, 1987

[3]
http://www.advantagefabricatedmetals.com/metalformingglossaryb.html

[4]
http://www.ent.ohiou.edu/~raub/manufacturing/forging.htm

[5] Erik Oberg & Franklin D. Jones & Holbrook L. Horton & Henry H. Ryffel “Machinery's handbook /a reference book for the mechanical engineer, designer, manufacturing engineer, draftsman, toolmaker, and machinist”, 1992

[6] 黃艦緯著, 左培倫指導, 「精密連桿沖床電腦輔助機構設計之研究」, 清華大學2002碩士論文

[7] S. Molian, “Mechanism design: the practical kinematics and dynamics of machinery”, 1997

[8] Barker, C. R., and Tso Pei-Lum, “Characteristic Surface for Three Position Function Generation with Planar Four Bar Mechanisms”, Journal of Mechanisms, Transmission, and Automation in Design, vol. 109, June 1987

[9] 梁克欽著, 左培倫指導, 「淨成型沖床之電腦輔助機構設計」, 清華大學2000碩士論文

[10] A. G. Sandor and G. N. Erdman “Mechanism design: analysis and synthesis”, 1984

[11] Rao, J. S. & Dukkipati, R. V., ”Mechanism and machine theory”, (Publish Info.) New York/Wiley/1989

[12] Howell, L.L. ,Midha, A. “Effects of a compliant workpiece on the input/output characteristics of rigid-link toggle mechanisms”, Mechanism & Machine Theory, v 30, n 6, Aug, 1995, p 801-810

[13] 押田良輝等著,陳以淦譯, 「機械製圖與演習第四冊」,五洲出版社

[14] 伊藤美光著,杜光宗譯, 「機械之驅動系統設計」，建宏出版社, 1995

[15] 賴耿陽譯著, 「應用塑性加工學」, 復漢出版社, 2000

[16] Charles E. Wilson, J. Peter Sadler. ”Kinematics and dynamics of machinery”, 1993

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